main.js

var ytdl_client;

(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof reqqq&&reqqq;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof reqqq&&reqqq,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(reqqq,module,exports){
const proxyquire = reqqq('proxyquireify')(reqqq); 
const realMiniget = reqqq('miniget');
const m3u8stream = reqqq('m3u8stream');
// We import the library so it cached before using proxyquire
const ytdlCore = reqqq('ytdl-core');

ytdl_client = (options) => {
    return proxyquire(ytdlCore, {
        miniget(url, opts){
            return realMiniget(options.proxyUrl + url, opts);
        },
        m3u8stream(url, opts){
            return m3u8stream(options.proxyUrl + url, opts);
        },
        ...(options.proxyquireStubs || {})
    });
};
},{"m3u8stream":13,"miniget":18,"proxyquireify":21,"ytdl-core":72}],2:[function(reqqq,module,exports){
'use strict'

exports.byteLength = byteLength
exports.toByteArray = toByteArray
exports.fromByteArray = fromByteArray

var lookup = []
var revLookup = []
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array

var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
for (var i = 0, len = code.length; i < len; ++i) {
  lookup[i] = code[i]
  revLookup[code.charCodeAt(i)] = i
}

// Support decoding URL-safe base64 strings, as Node.js does.
// See: https://en.wikipedia.org/wiki/Base64#URL_applications
revLookup['-'.charCodeAt(0)] = 62
revLookup['_'.charCodeAt(0)] = 63

function getLens (b64) {
  var len = b64.length

  if (len % 4 > 0) {
    throw new Error('Invalid string. Length must be a multiple of 4')
  }

  // Trim off extra bytes after placeholder bytes are found
  // See: https://github.com/beatgammit/base64-js/issues/42
  var validLen = b64.indexOf('=')
  if (validLen === -1) validLen = len

  var placeHoldersLen = validLen === len
    ? 0
    : 4 - (validLen % 4)

  return [validLen, placeHoldersLen]
}

// base64 is 4/3 + up to two characters of the original data
function byteLength (b64) {
  var lens = getLens(b64)
  var validLen = lens[0]
  var placeHoldersLen = lens[1]
  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}

function _byteLength (b64, validLen, placeHoldersLen) {
  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
}

function toByteArray (b64) {
  var tmp
  var lens = getLens(b64)
  var validLen = lens[0]
  var placeHoldersLen = lens[1]

  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))

  var curByte = 0

  // if there are placeholders, only get up to the last complete 4 chars
  var len = placeHoldersLen > 0
    ? validLen - 4
    : validLen

  var i
  for (i = 0; i < len; i += 4) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 18) |
      (revLookup[b64.charCodeAt(i + 1)] << 12) |
      (revLookup[b64.charCodeAt(i + 2)] << 6) |
      revLookup[b64.charCodeAt(i + 3)]
    arr[curByte++] = (tmp >> 16) & 0xFF
    arr[curByte++] = (tmp >> 8) & 0xFF
    arr[curByte++] = tmp & 0xFF
  }

  if (placeHoldersLen === 2) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 2) |
      (revLookup[b64.charCodeAt(i + 1)] >> 4)
    arr[curByte++] = tmp & 0xFF
  }

  if (placeHoldersLen === 1) {
    tmp =
      (revLookup[b64.charCodeAt(i)] << 10) |
      (revLookup[b64.charCodeAt(i + 1)] << 4) |
      (revLookup[b64.charCodeAt(i + 2)] >> 2)
    arr[curByte++] = (tmp >> 8) & 0xFF
    arr[curByte++] = tmp & 0xFF
  }

  return arr
}

function tripletToBase64 (num) {
  return lookup[num >> 18 & 0x3F] +
    lookup[num >> 12 & 0x3F] +
    lookup[num >> 6 & 0x3F] +
    lookup[num & 0x3F]
}

function encodeChunk (uint8, start, end) {
  var tmp
  var output = []
  for (var i = start; i < end; i += 3) {
    tmp =
      ((uint8[i] << 16) & 0xFF0000) +
      ((uint8[i + 1] << 8) & 0xFF00) +
      (uint8[i + 2] & 0xFF)
    output.push(tripletToBase64(tmp))
  }
  return output.join('')
}

function fromByteArray (uint8) {
  var tmp
  var len = uint8.length
  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
  var parts = []
  var maxChunkLength = 16383 // must be multiple of 3

  // go through the array every three bytes, we'll deal with trailing stuff later
  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
    parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))
  }

  // pad the end with zeros, but make sure to not forget the extra bytes
  if (extraBytes === 1) {
    tmp = uint8[len - 1]
    parts.push(
      lookup[tmp >> 2] +
      lookup[(tmp << 4) & 0x3F] +
      '=='
    )
  } else if (extraBytes === 2) {
    tmp = (uint8[len - 2] << 8) + uint8[len - 1]
    parts.push(
      lookup[tmp >> 10] +
      lookup[(tmp >> 4) & 0x3F] +
      lookup[(tmp << 2) & 0x3F] +
      '='
    )
  }

  return parts.join('')
}

},{}],3:[function(reqqq,module,exports){

},{}],4:[function(reqqq,module,exports){
(function (Buffer){(function (){
/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <https://feross.org>
 * @license  MIT
 */
/* eslint-disable no-proto */

'use strict'

var base64 = reqqq('base64-js')
var ieee754 = reqqq('ieee754')

exports.Buffer = Buffer
exports.SlowBuffer = SlowBuffer
exports.INSPECT_MAX_BYTES = 50

var K_MAX_LENGTH = 0x7fffffff
exports.kMaxLength = K_MAX_LENGTH

/**
 * If `Buffer.TYPED_ARRAY_SUPPORT`:
 *   === true    Use Uint8Array implementation (fastest)
 *   === false   Print warning and recommend using `buffer` v4.x which has an Object
 *               implementation (most compatible, even IE6)
 *
 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
 * Opera 11.6+, iOS 4.2+.
 *
 * We report that the browser does not support typed arrays if the are not subclassable
 * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
 * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
 * for __proto__ and has a buggy typed array implementation.
 */
Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()

if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
    typeof console.error === 'function') {
  console.error(
    'This browser lacks typed array (Uint8Array) support which is reqqqd by ' +
    '`buffer` v5.x. Use `buffer` v4.x if you reqqq old browser support.'
  )
}

function typedArraySupport () {
  // Can typed array instances can be augmented?
  try {
    var arr = new Uint8Array(1)
    arr.__proto__ = { __proto__: Uint8Array.prototype, foo: function () { return 42 } }
    return arr.foo() === 42
  } catch (e) {
    return false
  }
}

Object.defineProperty(Buffer.prototype, 'parent', {
  enumerable: true,
  get: function () {
    if (!Buffer.isBuffer(this)) return undefined
    return this.buffer
  }
})

Object.defineProperty(Buffer.prototype, 'offset', {
  enumerable: true,
  get: function () {
    if (!Buffer.isBuffer(this)) return undefined
    return this.byteOffset
  }
})

function createBuffer (length) {
  if (length > K_MAX_LENGTH) {
    throw new RangeError('The value "' + length + '" is invalid for option "size"')
  }
  // Return an augmented `Uint8Array` instance
  var buf = new Uint8Array(length)
  buf.__proto__ = Buffer.prototype
  return buf
}

/**
 * The Buffer constructor returns instances of `Uint8Array` that have their
 * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
 * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
 * and the `Uint8Array` methods. Square bracket notation works as expected -- it
 * returns a single octet.
 *
 * The `Uint8Array` prototype remains unmodified.
 */

function Buffer (arg, encodingOrOffset, length) {
  // Common case.
  if (typeof arg === 'number') {
    if (typeof encodingOrOffset === 'string') {
      throw new TypeError(
        'The "string" argument must be of type string. Received type number'
      )
    }
    return allocUnsafe(arg)
  }
  return from(arg, encodingOrOffset, length)
}

// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
if (typeof Symbol !== 'undefined' && Symbol.species != null &&
    Buffer[Symbol.species] === Buffer) {
  Object.defineProperty(Buffer, Symbol.species, {
    value: null,
    configurable: true,
    enumerable: false,
    writable: false
  })
}

Buffer.poolSize = 8192 // not used by this implementation

function from (value, encodingOrOffset, length) {
  if (typeof value === 'string') {
    return fromString(value, encodingOrOffset)
  }

  if (ArrayBuffer.isView(value)) {
    return fromArrayLike(value)
  }

  if (value == null) {
    throw TypeError(
      'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
      'or Array-like Object. Received type ' + (typeof value)
    )
  }

  if (isInstance(value, ArrayBuffer) ||
      (value && isInstance(value.buffer, ArrayBuffer))) {
    return fromArrayBuffer(value, encodingOrOffset, length)
  }

  if (typeof value === 'number') {
    throw new TypeError(
      'The "value" argument must not be of type number. Received type number'
    )
  }

  var valueOf = value.valueOf && value.valueOf()
  if (valueOf != null && valueOf !== value) {
    return Buffer.from(valueOf, encodingOrOffset, length)
  }

  var b = fromObject(value)
  if (b) return b

  if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
      typeof value[Symbol.toPrimitive] === 'function') {
    return Buffer.from(
      value[Symbol.toPrimitive]('string'), encodingOrOffset, length
    )
  }

  throw new TypeError(
    'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
    'or Array-like Object. Received type ' + (typeof value)
  )
}

/**
 * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
 * if value is a number.
 * Buffer.from(str[, encoding])
 * Buffer.from(array)
 * Buffer.from(buffer)
 * Buffer.from(arrayBuffer[, byteOffset[, length]])
 **/
Buffer.from = function (value, encodingOrOffset, length) {
  return from(value, encodingOrOffset, length)
}

// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
// https://github.com/feross/buffer/pull/148
Buffer.prototype.__proto__ = Uint8Array.prototype
Buffer.__proto__ = Uint8Array

function assertSize (size) {
  if (typeof size !== 'number') {
    throw new TypeError('"size" argument must be of type number')
  } else if (size < 0) {
    throw new RangeError('The value "' + size + '" is invalid for option "size"')
  }
}

function alloc (size, fill, encoding) {
  assertSize(size)
  if (size <= 0) {
    return createBuffer(size)
  }
  if (fill !== undefined) {
    // Only pay attention to encoding if it's a string. This
    // prevents accidentally sending in a number that would
    // be interpretted as a start offset.
    return typeof encoding === 'string'
      ? createBuffer(size).fill(fill, encoding)
      : createBuffer(size).fill(fill)
  }
  return createBuffer(size)
}

/**
 * Creates a new filled Buffer instance.
 * alloc(size[, fill[, encoding]])
 **/
Buffer.alloc = function (size, fill, encoding) {
  return alloc(size, fill, encoding)
}

function allocUnsafe (size) {
  assertSize(size)
  return createBuffer(size < 0 ? 0 : checked(size) | 0)
}

/**
 * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
 * */
Buffer.allocUnsafe = function (size) {
  return allocUnsafe(size)
}
/**
 * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
 */
Buffer.allocUnsafeSlow = function (size) {
  return allocUnsafe(size)
}

function fromString (string, encoding) {
  if (typeof encoding !== 'string' || encoding === '') {
    encoding = 'utf8'
  }

  if (!Buffer.isEncoding(encoding)) {
    throw new TypeError('Unknown encoding: ' + encoding)
  }

  var length = byteLength(string, encoding) | 0
  var buf = createBuffer(length)

  var actual = buf.write(string, encoding)

  if (actual !== length) {
    // Writing a hex string, for example, that contains invalid characters will
    // cause everything after the first invalid character to be ignored. (e.g.
    // 'abxxcd' will be treated as 'ab')
    buf = buf.slice(0, actual)
  }

  return buf
}

function fromArrayLike (array) {
  var length = array.length < 0 ? 0 : checked(array.length) | 0
  var buf = createBuffer(length)
  for (var i = 0; i < length; i += 1) {
    buf[i] = array[i] & 255
  }
  return buf
}

function fromArrayBuffer (array, byteOffset, length) {
  if (byteOffset < 0 || array.byteLength < byteOffset) {
    throw new RangeError('"offset" is outside of buffer bounds')
  }

  if (array.byteLength < byteOffset + (length || 0)) {
    throw new RangeError('"length" is outside of buffer bounds')
  }

  var buf
  if (byteOffset === undefined && length === undefined) {
    buf = new Uint8Array(array)
  } else if (length === undefined) {
    buf = new Uint8Array(array, byteOffset)
  } else {
    buf = new Uint8Array(array, byteOffset, length)
  }

  // Return an augmented `Uint8Array` instance
  buf.__proto__ = Buffer.prototype
  return buf
}

function fromObject (obj) {
  if (Buffer.isBuffer(obj)) {
    var len = checked(obj.length) | 0
    var buf = createBuffer(len)

    if (buf.length === 0) {
      return buf
    }

    obj.copy(buf, 0, 0, len)
    return buf
  }

  if (obj.length !== undefined) {
    if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
      return createBuffer(0)
    }
    return fromArrayLike(obj)
  }

  if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
    return fromArrayLike(obj.data)
  }
}

function checked (length) {
  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
  // length is NaN (which is otherwise coerced to zero.)
  if (length >= K_MAX_LENGTH) {
    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
                         'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
  }
  return length | 0
}

function SlowBuffer (length) {
  if (+length != length) { // eslint-disable-line eqeqeq
    length = 0
  }
  return Buffer.alloc(+length)
}

Buffer.isBuffer = function isBuffer (b) {
  return b != null && b._isBuffer === true &&
    b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
}

Buffer.compare = function compare (a, b) {
  if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
  if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
    throw new TypeError(
      'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
    )
  }

  if (a === b) return 0

  var x = a.length
  var y = b.length

  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
    if (a[i] !== b[i]) {
      x = a[i]
      y = b[i]
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

Buffer.isEncoding = function isEncoding (encoding) {
  switch (String(encoding).toLowerCase()) {
    case 'hex':
    case 'utf8':
    case 'utf-8':
    case 'ascii':
    case 'latin1':
    case 'binary':
    case 'base64':
    case 'ucs2':
    case 'ucs-2':
    case 'utf16le':
    case 'utf-16le':
      return true
    default:
      return false
  }
}

Buffer.concat = function concat (list, length) {
  if (!Array.isArray(list)) {
    throw new TypeError('"list" argument must be an Array of Buffers')
  }

  if (list.length === 0) {
    return Buffer.alloc(0)
  }

  var i
  if (length === undefined) {
    length = 0
    for (i = 0; i < list.length; ++i) {
      length += list[i].length
    }
  }

  var buffer = Buffer.allocUnsafe(length)
  var pos = 0
  for (i = 0; i < list.length; ++i) {
    var buf = list[i]
    if (isInstance(buf, Uint8Array)) {
      buf = Buffer.from(buf)
    }
    if (!Buffer.isBuffer(buf)) {
      throw new TypeError('"list" argument must be an Array of Buffers')
    }
    buf.copy(buffer, pos)
    pos += buf.length
  }
  return buffer
}

function byteLength (string, encoding) {
  if (Buffer.isBuffer(string)) {
    return string.length
  }
  if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
    return string.byteLength
  }
  if (typeof string !== 'string') {
    throw new TypeError(
      'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
      'Received type ' + typeof string
    )
  }

  var len = string.length
  var mustMatch = (arguments.length > 2 && arguments[2] === true)
  if (!mustMatch && len === 0) return 0

  // Use a for loop to avoid recursion
  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'ascii':
      case 'latin1':
      case 'binary':
        return len
      case 'utf8':
      case 'utf-8':
        return utf8ToBytes(string).length
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return len * 2
      case 'hex':
        return len >>> 1
      case 'base64':
        return base64ToBytes(string).length
      default:
        if (loweredCase) {
          return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
        }
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}
Buffer.byteLength = byteLength

function slowToString (encoding, start, end) {
  var loweredCase = false

  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
  // property of a typed array.

  // This behaves neither like String nor Uint8Array in that we set start/end
  // to their upper/lower bounds if the value passed is out of range.
  // undefined is handled specially as per ECMA-262 6th Edition,
  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
  if (start === undefined || start < 0) {
    start = 0
  }
  // Return early if start > this.length. Done here to prevent potential uint32
  // coercion fail below.
  if (start > this.length) {
    return ''
  }

  if (end === undefined || end > this.length) {
    end = this.length
  }

  if (end <= 0) {
    return ''
  }

  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
  end >>>= 0
  start >>>= 0

  if (end <= start) {
    return ''
  }

  if (!encoding) encoding = 'utf8'

  while (true) {
    switch (encoding) {
      case 'hex':
        return hexSlice(this, start, end)

      case 'utf8':
      case 'utf-8':
        return utf8Slice(this, start, end)

      case 'ascii':
        return asciiSlice(this, start, end)

      case 'latin1':
      case 'binary':
        return latin1Slice(this, start, end)

      case 'base64':
        return base64Slice(this, start, end)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return utf16leSlice(this, start, end)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = (encoding + '').toLowerCase()
        loweredCase = true
    }
  }
}

// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
// reliably in a browserify context because there could be multiple different
// copies of the 'buffer' package in use. This method works even for Buffer
// instances that were created from another copy of the `buffer` package.
// See: https://github.com/feross/buffer/issues/154
Buffer.prototype._isBuffer = true

function swap (b, n, m) {
  var i = b[n]
  b[n] = b[m]
  b[m] = i
}

Buffer.prototype.swap16 = function swap16 () {
  var len = this.length
  if (len % 2 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 16-bits')
  }
  for (var i = 0; i < len; i += 2) {
    swap(this, i, i + 1)
  }
  return this
}

Buffer.prototype.swap32 = function swap32 () {
  var len = this.length
  if (len % 4 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 32-bits')
  }
  for (var i = 0; i < len; i += 4) {
    swap(this, i, i + 3)
    swap(this, i + 1, i + 2)
  }
  return this
}

Buffer.prototype.swap64 = function swap64 () {
  var len = this.length
  if (len % 8 !== 0) {
    throw new RangeError('Buffer size must be a multiple of 64-bits')
  }
  for (var i = 0; i < len; i += 8) {
    swap(this, i, i + 7)
    swap(this, i + 1, i + 6)
    swap(this, i + 2, i + 5)
    swap(this, i + 3, i + 4)
  }
  return this
}

Buffer.prototype.toString = function toString () {
  var length = this.length
  if (length === 0) return ''
  if (arguments.length === 0) return utf8Slice(this, 0, length)
  return slowToString.apply(this, arguments)
}

Buffer.prototype.toLocaleString = Buffer.prototype.toString

Buffer.prototype.equals = function equals (b) {
  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return true
  return Buffer.compare(this, b) === 0
}

Buffer.prototype.inspect = function inspect () {
  var str = ''
  var max = exports.INSPECT_MAX_BYTES
  str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
  if (this.length > max) str += ' ... '
  return '<Buffer ' + str + '>'
}

Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
  if (isInstance(target, Uint8Array)) {
    target = Buffer.from(target, target.offset, target.byteLength)
  }
  if (!Buffer.isBuffer(target)) {
    throw new TypeError(
      'The "target" argument must be one of type Buffer or Uint8Array. ' +
      'Received type ' + (typeof target)
    )
  }

  if (start === undefined) {
    start = 0
  }
  if (end === undefined) {
    end = target ? target.length : 0
  }
  if (thisStart === undefined) {
    thisStart = 0
  }
  if (thisEnd === undefined) {
    thisEnd = this.length
  }

  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
    throw new RangeError('out of range index')
  }

  if (thisStart >= thisEnd && start >= end) {
    return 0
  }
  if (thisStart >= thisEnd) {
    return -1
  }
  if (start >= end) {
    return 1
  }

  start >>>= 0
  end >>>= 0
  thisStart >>>= 0
  thisEnd >>>= 0

  if (this === target) return 0

  var x = thisEnd - thisStart
  var y = end - start
  var len = Math.min(x, y)

  var thisCopy = this.slice(thisStart, thisEnd)
  var targetCopy = target.slice(start, end)

  for (var i = 0; i < len; ++i) {
    if (thisCopy[i] !== targetCopy[i]) {
      x = thisCopy[i]
      y = targetCopy[i]
      break
    }
  }

  if (x < y) return -1
  if (y < x) return 1
  return 0
}

// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
//
// Arguments:
// - buffer - a Buffer to search
// - val - a string, Buffer, or number
// - byteOffset - an index into `buffer`; will be clamped to an int32
// - encoding - an optional encoding, relevant is val is a string
// - dir - true for indexOf, false for lastIndexOf
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
  // Empty buffer means no match
  if (buffer.length === 0) return -1

  // Normalize byteOffset
  if (typeof byteOffset === 'string') {
    encoding = byteOffset
    byteOffset = 0
  } else if (byteOffset > 0x7fffffff) {
    byteOffset = 0x7fffffff
  } else if (byteOffset < -0x80000000) {
    byteOffset = -0x80000000
  }
  byteOffset = +byteOffset // Coerce to Number.
  if (numberIsNaN(byteOffset)) {
    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
    byteOffset = dir ? 0 : (buffer.length - 1)
  }

  // Normalize byteOffset: negative offsets start from the end of the buffer
  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
  if (byteOffset >= buffer.length) {
    if (dir) return -1
    else byteOffset = buffer.length - 1
  } else if (byteOffset < 0) {
    if (dir) byteOffset = 0
    else return -1
  }

  // Normalize val
  if (typeof val === 'string') {
    val = Buffer.from(val, encoding)
  }

  // Finally, search either indexOf (if dir is true) or lastIndexOf
  if (Buffer.isBuffer(val)) {
    // Special case: looking for empty string/buffer always fails
    if (val.length === 0) {
      return -1
    }
    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
  } else if (typeof val === 'number') {
    val = val & 0xFF // Search for a byte value [0-255]
    if (typeof Uint8Array.prototype.indexOf === 'function') {
      if (dir) {
        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
      } else {
        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
      }
    }
    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
  }

  throw new TypeError('val must be string, number or Buffer')
}

function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
  var indexSize = 1
  var arrLength = arr.length
  var valLength = val.length

  if (encoding !== undefined) {
    encoding = String(encoding).toLowerCase()
    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
        encoding === 'utf16le' || encoding === 'utf-16le') {
      if (arr.length < 2 || val.length < 2) {
        return -1
      }
      indexSize = 2
      arrLength /= 2
      valLength /= 2
      byteOffset /= 2
    }
  }

  function read (buf, i) {
    if (indexSize === 1) {
      return buf[i]
    } else {
      return buf.readUInt16BE(i * indexSize)
    }
  }

  var i
  if (dir) {
    var foundIndex = -1
    for (i = byteOffset; i < arrLength; i++) {
      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
        if (foundIndex === -1) foundIndex = i
        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
      } else {
        if (foundIndex !== -1) i -= i - foundIndex
        foundIndex = -1
      }
    }
  } else {
    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
    for (i = byteOffset; i >= 0; i--) {
      var found = true
      for (var j = 0; j < valLength; j++) {
        if (read(arr, i + j) !== read(val, j)) {
          found = false
          break
        }
      }
      if (found) return i
    }
  }

  return -1
}

Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
  return this.indexOf(val, byteOffset, encoding) !== -1
}

Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
}

Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
}

function hexWrite (buf, string, offset, length) {
  offset = Number(offset) || 0
  var remaining = buf.length - offset
  if (!length) {
    length = remaining
  } else {
    length = Number(length)
    if (length > remaining) {
      length = remaining
    }
  }

  var strLen = string.length

  if (length > strLen / 2) {
    length = strLen / 2
  }
  for (var i = 0; i < length; ++i) {
    var parsed = parseInt(string.substr(i * 2, 2), 16)
    if (numberIsNaN(parsed)) return i
    buf[offset + i] = parsed
  }
  return i
}

function utf8Write (buf, string, offset, length) {
  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}

function asciiWrite (buf, string, offset, length) {
  return blitBuffer(asciiToBytes(string), buf, offset, length)
}

function latin1Write (buf, string, offset, length) {
  return asciiWrite(buf, string, offset, length)
}

function base64Write (buf, string, offset, length) {
  return blitBuffer(base64ToBytes(string), buf, offset, length)
}

function ucs2Write (buf, string, offset, length) {
  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}

Buffer.prototype.write = function write (string, offset, length, encoding) {
  // Buffer#write(string)
  if (offset === undefined) {
    encoding = 'utf8'
    length = this.length
    offset = 0
  // Buffer#write(string, encoding)
  } else if (length === undefined && typeof offset === 'string') {
    encoding = offset
    length = this.length
    offset = 0
  // Buffer#write(string, offset[, length][, encoding])
  } else if (isFinite(offset)) {
    offset = offset >>> 0
    if (isFinite(length)) {
      length = length >>> 0
      if (encoding === undefined) encoding = 'utf8'
    } else {
      encoding = length
      length = undefined
    }
  } else {
    throw new Error(
      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
    )
  }

  var remaining = this.length - offset
  if (length === undefined || length > remaining) length = remaining

  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
    throw new RangeError('Attempt to write outside buffer bounds')
  }

  if (!encoding) encoding = 'utf8'

  var loweredCase = false
  for (;;) {
    switch (encoding) {
      case 'hex':
        return hexWrite(this, string, offset, length)

      case 'utf8':
      case 'utf-8':
        return utf8Write(this, string, offset, length)

      case 'ascii':
        return asciiWrite(this, string, offset, length)

      case 'latin1':
      case 'binary':
        return latin1Write(this, string, offset, length)

      case 'base64':
        // Warning: maxLength not taken into account in base64Write
        return base64Write(this, string, offset, length)

      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return ucs2Write(this, string, offset, length)

      default:
        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
        encoding = ('' + encoding).toLowerCase()
        loweredCase = true
    }
  }
}

Buffer.prototype.toJSON = function toJSON () {
  return {
    type: 'Buffer',
    data: Array.prototype.slice.call(this._arr || this, 0)
  }
}

function base64Slice (buf, start, end) {
  if (start === 0 && end === buf.length) {
    return base64.fromByteArray(buf)
  } else {
    return base64.fromByteArray(buf.slice(start, end))
  }
}

function utf8Slice (buf, start, end) {
  end = Math.min(buf.length, end)
  var res = []

  var i = start
  while (i < end) {
    var firstByte = buf[i]
    var codePoint = null
    var bytesPerSequence = (firstByte > 0xEF) ? 4
      : (firstByte > 0xDF) ? 3
        : (firstByte > 0xBF) ? 2
          : 1

    if (i + bytesPerSequence <= end) {
      var secondByte, thirdByte, fourthByte, tempCodePoint

      switch (bytesPerSequence) {
        case 1:
          if (firstByte < 0x80) {
            codePoint = firstByte
          }
          break
        case 2:
          secondByte = buf[i + 1]
          if ((secondByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
            if (tempCodePoint > 0x7F) {
              codePoint = tempCodePoint
            }
          }
          break
        case 3:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
              codePoint = tempCodePoint
            }
          }
          break
        case 4:
          secondByte = buf[i + 1]
          thirdByte = buf[i + 2]
          fourthByte = buf[i + 3]
          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
              codePoint = tempCodePoint
            }
          }
      }
    }

    if (codePoint === null) {
      // we did not generate a valid codePoint so insert a
      // replacement char (U+FFFD) and advance only 1 byte
      codePoint = 0xFFFD
      bytesPerSequence = 1
    } else if (codePoint > 0xFFFF) {
      // encode to utf16 (surrogate pair dance)
      codePoint -= 0x10000
      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
      codePoint = 0xDC00 | codePoint & 0x3FF
    }

    res.push(codePoint)
    i += bytesPerSequence
  }

  return decodeCodePointsArray(res)
}

// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000

function decodeCodePointsArray (codePoints) {
  var len = codePoints.length
  if (len <= MAX_ARGUMENTS_LENGTH) {
    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
  }

  // Decode in chunks to avoid "call stack size exceeded".
  var res = ''
  var i = 0
  while (i < len) {
    res += String.fromCharCode.apply(
      String,
      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
    )
  }
  return res
}

function asciiSlice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i] & 0x7F)
  }
  return ret
}

function latin1Slice (buf, start, end) {
  var ret = ''
  end = Math.min(buf.length, end)

  for (var i = start; i < end; ++i) {
    ret += String.fromCharCode(buf[i])
  }
  return ret
}

function hexSlice (buf, start, end) {
  var len = buf.length

  if (!start || start < 0) start = 0
  if (!end || end < 0 || end > len) end = len

  var out = ''
  for (var i = start; i < end; ++i) {
    out += toHex(buf[i])
  }
  return out
}

function utf16leSlice (buf, start, end) {
  var bytes = buf.slice(start, end)
  var res = ''
  for (var i = 0; i < bytes.length; i += 2) {
    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
  }
  return res
}

Buffer.prototype.slice = function slice (start, end) {
  var len = this.length
  start = ~~start
  end = end === undefined ? len : ~~end

  if (start < 0) {
    start += len
    if (start < 0) start = 0
  } else if (start > len) {
    start = len
  }

  if (end < 0) {
    end += len
    if (end < 0) end = 0
  } else if (end > len) {
    end = len
  }

  if (end < start) end = start

  var newBuf = this.subarray(start, end)
  // Return an augmented `Uint8Array` instance
  newBuf.__proto__ = Buffer.prototype
  return newBuf
}

/*
 * Need to make sure that buffer isn't trying to write out of bounds.
 */
function checkOffset (offset, ext, length) {
  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}

Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }

  return val
}

Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) {
    checkOffset(offset, byteLength, this.length)
  }

  var val = this[offset + --byteLength]
  var mul = 1
  while (byteLength > 0 && (mul *= 0x100)) {
    val += this[offset + --byteLength] * mul
  }

  return val
}

Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 1, this.length)
  return this[offset]
}

Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 2, this.length)
  return this[offset] | (this[offset + 1] << 8)
}

Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 2, this.length)
  return (this[offset] << 8) | this[offset + 1]
}

Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)

  return ((this[offset]) |
      (this[offset + 1] << 8) |
      (this[offset + 2] << 16)) +
      (this[offset + 3] * 0x1000000)
}

Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] * 0x1000000) +
    ((this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    this[offset + 3])
}

Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var val = this[offset]
  var mul = 1
  var i = 0
  while (++i < byteLength && (mul *= 0x100)) {
    val += this[offset + i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) checkOffset(offset, byteLength, this.length)

  var i = byteLength
  var mul = 1
  var val = this[offset + --i]
  while (i > 0 && (mul *= 0x100)) {
    val += this[offset + --i] * mul
  }
  mul *= 0x80

  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

  return val
}

Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 1, this.length)
  if (!(this[offset] & 0x80)) return (this[offset])
  return ((0xff - this[offset] + 1) * -1)
}

Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset] | (this[offset + 1] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 2, this.length)
  var val = this[offset + 1] | (this[offset] << 8)
  return (val & 0x8000) ? val | 0xFFFF0000 : val
}

Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset]) |
    (this[offset + 1] << 8) |
    (this[offset + 2] << 16) |
    (this[offset + 3] << 24)
}

Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)

  return (this[offset] << 24) |
    (this[offset + 1] << 16) |
    (this[offset + 2] << 8) |
    (this[offset + 3])
}

Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, true, 23, 4)
}

Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 4, this.length)
  return ieee754.read(this, offset, false, 23, 4)
}

Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, true, 52, 8)
}

Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
  offset = offset >>> 0
  if (!noAssert) checkOffset(offset, 8, this.length)
  return ieee754.read(this, offset, false, 52, 8)
}

function checkInt (buf, value, offset, ext, max, min) {
  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
}

Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1
    checkInt(this, value, offset, byteLength, maxBytes, 0)
  }

  var mul = 1
  var i = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset >>> 0
  byteLength = byteLength >>> 0
  if (!noAssert) {
    var maxBytes = Math.pow(2, 8 * byteLength) - 1
    checkInt(this, value, offset, byteLength, maxBytes, 0)
  }

  var i = byteLength - 1
  var mul = 1
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    this[offset + i] = (value / mul) & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
  this[offset] = (value & 0xff)
  return offset + 1
}

Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  this[offset] = (value & 0xff)
  this[offset + 1] = (value >>> 8)
  return offset + 2
}

Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
  this[offset] = (value >>> 8)
  this[offset + 1] = (value & 0xff)
  return offset + 2
}

Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  this[offset + 3] = (value >>> 24)
  this[offset + 2] = (value >>> 16)
  this[offset + 1] = (value >>> 8)
  this[offset] = (value & 0xff)
  return offset + 4
}

Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
  this[offset] = (value >>> 24)
  this[offset + 1] = (value >>> 16)
  this[offset + 2] = (value >>> 8)
  this[offset + 3] = (value & 0xff)
  return offset + 4
}

Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) {
    var limit = Math.pow(2, (8 * byteLength) - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = 0
  var mul = 1
  var sub = 0
  this[offset] = value & 0xFF
  while (++i < byteLength && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
      sub = 1
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) {
    var limit = Math.pow(2, (8 * byteLength) - 1)

    checkInt(this, value, offset, byteLength, limit - 1, -limit)
  }

  var i = byteLength - 1
  var mul = 1
  var sub = 0
  this[offset + i] = value & 0xFF
  while (--i >= 0 && (mul *= 0x100)) {
    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
      sub = 1
    }
    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
  }

  return offset + byteLength
}

Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
  if (value < 0) value = 0xff + value + 1
  this[offset] = (value & 0xff)
  return offset + 1
}

Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  this[offset] = (value & 0xff)
  this[offset + 1] = (value >>> 8)
  return offset + 2
}

Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
  this[offset] = (value >>> 8)
  this[offset + 1] = (value & 0xff)
  return offset + 2
}

Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  this[offset] = (value & 0xff)
  this[offset + 1] = (value >>> 8)
  this[offset + 2] = (value >>> 16)
  this[offset + 3] = (value >>> 24)
  return offset + 4
}

Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
  if (value < 0) value = 0xffffffff + value + 1
  this[offset] = (value >>> 24)
  this[offset + 1] = (value >>> 16)
  this[offset + 2] = (value >>> 8)
  this[offset + 3] = (value & 0xff)
  return offset + 4
}

function checkIEEE754 (buf, value, offset, ext, max, min) {
  if (offset + ext > buf.length) throw new RangeError('Index out of range')
  if (offset < 0) throw new RangeError('Index out of range')
}

function writeFloat (buf, value, offset, littleEndian, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
  }
  ieee754.write(buf, value, offset, littleEndian, 23, 4)
  return offset + 4
}

Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
  return writeFloat(this, value, offset, true, noAssert)
}

Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
  return writeFloat(this, value, offset, false, noAssert)
}

function writeDouble (buf, value, offset, littleEndian, noAssert) {
  value = +value
  offset = offset >>> 0
  if (!noAssert) {
    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
  }
  ieee754.write(buf, value, offset, littleEndian, 52, 8)
  return offset + 8
}

Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
  return writeDouble(this, value, offset, true, noAssert)
}

Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
  return writeDouble(this, value, offset, false, noAssert)
}

// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
  if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
  if (!start) start = 0
  if (!end && end !== 0) end = this.length
  if (targetStart >= target.length) targetStart = target.length
  if (!targetStart) targetStart = 0
  if (end > 0 && end < start) end = start

  // Copy 0 bytes; we're done
  if (end === start) return 0
  if (target.length === 0 || this.length === 0) return 0

  // Fatal error conditions
  if (targetStart < 0) {
    throw new RangeError('targetStart out of bounds')
  }
  if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
  if (end < 0) throw new RangeError('sourceEnd out of bounds')

  // Are we oob?
  if (end > this.length) end = this.length
  if (target.length - targetStart < end - start) {
    end = target.length - targetStart + start
  }

  var len = end - start

  if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
    // Use built-in when available, missing from IE11
    this.copyWithin(targetStart, start, end)
  } else if (this === target && start < targetStart && targetStart < end) {
    // descending copy from end
    for (var i = len - 1; i >= 0; --i) {
      target[i + targetStart] = this[i + start]
    }
  } else {
    Uint8Array.prototype.set.call(
      target,
      this.subarray(start, end),
      targetStart
    )
  }

  return len
}

// Usage:
//    buffer.fill(number[, offset[, end]])
//    buffer.fill(buffer[, offset[, end]])
//    buffer.fill(string[, offset[, end]][, encoding])
Buffer.prototype.fill = function fill (val, start, end, encoding) {
  // Handle string cases:
  if (typeof val === 'string') {
    if (typeof start === 'string') {
      encoding = start
      start = 0
      end = this.length
    } else if (typeof end === 'string') {
      encoding = end
      end = this.length
    }
    if (encoding !== undefined && typeof encoding !== 'string') {
      throw new TypeError('encoding must be a string')
    }
    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
      throw new TypeError('Unknown encoding: ' + encoding)
    }
    if (val.length === 1) {
      var code = val.charCodeAt(0)
      if ((encoding === 'utf8' && code < 128) ||
          encoding === 'latin1') {
        // Fast path: If `val` fits into a single byte, use that numeric value.
        val = code
      }
    }
  } else if (typeof val === 'number') {
    val = val & 255
  }

  // Invalid ranges are not set to a default, so can range check early.
  if (start < 0 || this.length < start || this.length < end) {
    throw new RangeError('Out of range index')
  }

  if (end <= start) {
    return this
  }

  start = start >>> 0
  end = end === undefined ? this.length : end >>> 0

  if (!val) val = 0

  var i
  if (typeof val === 'number') {
    for (i = start; i < end; ++i) {
      this[i] = val
    }
  } else {
    var bytes = Buffer.isBuffer(val)
      ? val
      : Buffer.from(val, encoding)
    var len = bytes.length
    if (len === 0) {
      throw new TypeError('The value "' + val +
        '" is invalid for argument "value"')
    }
    for (i = 0; i < end - start; ++i) {
      this[i + start] = bytes[i % len]
    }
  }

  return this
}

// HELPER FUNCTIONS
// ================

var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g

function base64clean (str) {
  // Node takes equal signs as end of the Base64 encoding
  str = str.split('=')[0]
  // Node strips out invalid characters like \n and \t from the string, base64-js does not
  str = str.trim().replace(INVALID_BASE64_RE, '')
  // Node converts strings with length < 2 to ''
  if (str.length < 2) return ''
  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
  while (str.length % 4 !== 0) {
    str = str + '='
  }
  return str
}

function toHex (n) {
  if (n < 16) return '0' + n.toString(16)
  return n.toString(16)
}

function utf8ToBytes (string, units) {
  units = units || Infinity
  var codePoint
  var length = string.length
  var leadSurrogate = null
  var bytes = []

  for (var i = 0; i < length; ++i) {
    codePoint = string.charCodeAt(i)

    // is surrogate component
    if (codePoint > 0xD7FF && codePoint < 0xE000) {
      // last char was a lead
      if (!leadSurrogate) {
        // no lead yet
        if (codePoint > 0xDBFF) {
          // unexpected trail
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        } else if (i + 1 === length) {
          // unpaired lead
          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
          continue
        }

        // valid lead
        leadSurrogate = codePoint

        continue
      }

      // 2 leads in a row
      if (codePoint < 0xDC00) {
        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
        leadSurrogate = codePoint
        continue
      }

      // valid surrogate pair
      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
    } else if (leadSurrogate) {
      // valid bmp char, but last char was a lead
      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
    }

    leadSurrogate = null

    // encode utf8
    if (codePoint < 0x80) {
      if ((units -= 1) < 0) break
      bytes.push(codePoint)
    } else if (codePoint < 0x800) {
      if ((units -= 2) < 0) break
      bytes.push(
        codePoint >> 0x6 | 0xC0,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x10000) {
      if ((units -= 3) < 0) break
      bytes.push(
        codePoint >> 0xC | 0xE0,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else if (codePoint < 0x110000) {
      if ((units -= 4) < 0) break
      bytes.push(
        codePoint >> 0x12 | 0xF0,
        codePoint >> 0xC & 0x3F | 0x80,
        codePoint >> 0x6 & 0x3F | 0x80,
        codePoint & 0x3F | 0x80
      )
    } else {
      throw new Error('Invalid code point')
    }
  }

  return bytes
}

function asciiToBytes (str) {
  var byteArray = []
  for (var i = 0; i < str.length; ++i) {
    // Node's code seems to be doing this and not & 0x7F..
    byteArray.push(str.charCodeAt(i) & 0xFF)
  }
  return byteArray
}

function utf16leToBytes (str, units) {
  var c, hi, lo
  var byteArray = []
  for (var i = 0; i < str.length; ++i) {
    if ((units -= 2) < 0) break

    c = str.charCodeAt(i)
    hi = c >> 8
    lo = c % 256
    byteArray.push(lo)
    byteArray.push(hi)
  }

  return byteArray
}

function base64ToBytes (str) {
  return base64.toByteArray(base64clean(str))
}

function blitBuffer (src, dst, offset, length) {
  for (var i = 0; i < length; ++i) {
    if ((i + offset >= dst.length) || (i >= src.length)) break
    dst[i + offset] = src[i]
  }
  return i
}

// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
// the `instanceof` check but they should be treated as of that type.
// See: https://github.com/feross/buffer/issues/166
function isInstance (obj, type) {
  return obj instanceof type ||
    (obj != null && obj.constructor != null && obj.constructor.name != null &&
      obj.constructor.name === type.name)
}
function numberIsNaN (obj) {
  // For IE11 support
  return obj !== obj // eslint-disable-line no-self-compare
}

}).call(this)}).call(this,reqqq("buffer").Buffer)
},{"base64-js":2,"buffer":4,"ieee754":9}],5:[function(reqqq,module,exports){
module.exports = {
  "100": "Continue",
  "101": "Switching Protocols",
  "102": "Processing",
  "200": "OK",
  "201": "Created",
  "202": "Accepted",
  "203": "Non-Authoritative Information",
  "204": "No Content",
  "205": "Reset Content",
  "206": "Partial Content",
  "207": "Multi-Status",
  "208": "Already Reported",
  "226": "IM Used",
  "300": "Multiple Choices",
  "301": "Moved Permanently",
  "302": "Found",
  "303": "See Other",
  "304": "Not Modified",
  "305": "Use Proxy",
  "307": "Temporary Redirect",
  "308": "Permanent Redirect",
  "400": "Bad Request",
  "401": "Unauthorized",
  "402": "Payment reqqqd",
  "403": "Forbidden",
  "404": "Not Found",
  "405": "Method Not Allowed",
  "406": "Not Acceptable",
  "407": "Proxy Authentication reqqqd",
  "408": "Request Timeout",
  "409": "Conflict",
  "410": "Gone",
  "411": "Length reqqqd",
  "412": "Precondition Failed",
  "413": "Payload Too Large",
  "414": "URI Too Long",
  "415": "Unsupported Media Type",
  "416": "Range Not Satisfiable",
  "417": "Expectation Failed",
  "418": "I'm a teapot",
  "421": "Misdirected Request",
  "422": "Unprocessable Entity",
  "423": "Locked",
  "424": "Failed Dependency",
  "425": "Unordered Collection",
  "426": "Upgrade reqqqd",
  "428": "Precondition reqqqd",
  "429": "Too Many Requests",
  "431": "Request Header Fields Too Large",
  "451": "Unavailable For Legal Reasons",
  "500": "Internal Server Error",
  "501": "Not Implemented",
  "502": "Bad Gateway",
  "503": "Service Unavailable",
  "504": "Gateway Timeout",
  "505": "HTTP Version Not Supported",
  "506": "Variant Also Negotiates",
  "507": "Insufficient Storage",
  "508": "Loop Detected",
  "509": "Bandwidth Limit Exceeded",
  "510": "Not Extended",
  "511": "Network Authentication reqqqd"
}

},{}],6:[function(reqqq,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

var R = typeof Reflect === 'object' ? Reflect : null
var ReflectApply = R && typeof R.apply === 'function'
  ? R.apply
  : function ReflectApply(target, receiver, args) {
    return Function.prototype.apply.call(target, receiver, args);
  }

var ReflectOwnKeys
if (R && typeof R.ownKeys === 'function') {
  ReflectOwnKeys = R.ownKeys
} else if (Object.getOwnPropertySymbols) {
  ReflectOwnKeys = function ReflectOwnKeys(target) {
    return Object.getOwnPropertyNames(target)
      .concat(Object.getOwnPropertySymbols(target));
  };
} else {
  ReflectOwnKeys = function ReflectOwnKeys(target) {
    return Object.getOwnPropertyNames(target);
  };
}

function ProcessEmitWarning(warning) {
  if (console && console.warn) console.warn(warning);
}

var NumberIsNaN = Number.isNaN || function NumberIsNaN(value) {
  return value !== value;
}

function EventEmitter() {
  EventEmitter.init.call(this);
}
module.exports = EventEmitter;
module.exports.once = once;

// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.prototype._events = undefined;
EventEmitter.prototype._eventsCount = 0;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
var defaultMaxListeners = 10;

function checkListener(listener) {
  if (typeof listener !== 'function') {
    throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
  }
}

Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
  enumerable: true,
  get: function() {
    return defaultMaxListeners;
  },
  set: function(arg) {
    if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
      throw new RangeError('The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' + arg + '.');
    }
    defaultMaxListeners = arg;
  }
});

EventEmitter.init = function() {

  if (this._events === undefined ||
      this._events === Object.getPrototypeOf(this)._events) {
    this._events = Object.create(null);
    this._eventsCount = 0;
  }

  this._maxListeners = this._maxListeners || undefined;
};

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
  if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
    throw new RangeError('The value of "n" is out of range. It must be a non-negative number. Received ' + n + '.');
  }
  this._maxListeners = n;
  return this;
};

function _getMaxListeners(that) {
  if (that._maxListeners === undefined)
    return EventEmitter.defaultMaxListeners;
  return that._maxListeners;
}

EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
  return _getMaxListeners(this);
};

EventEmitter.prototype.emit = function emit(type) {
  var args = [];
  for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
  var doError = (type === 'error');

  var events = this._events;
  if (events !== undefined)
    doError = (doError && events.error === undefined);
  else if (!doError)
    return false;

  // If there is no 'error' event listener then throw.
  if (doError) {
    var er;
    if (args.length > 0)
      er = args[0];
    if (er instanceof Error) {
      // Note: The comments on the `throw` lines are intentional, they show
      // up in Node's output if this results in an unhandled exception.
      throw er; // Unhandled 'error' event
    }
    // At least give some kind of context to the user
    var err = new Error('Unhandled error.' + (er ? ' (' + er.message + ')' : ''));
    err.context = er;
    throw err; // Unhandled 'error' event
  }

  var handler = events[type];

  if (handler === undefined)
    return false;

  if (typeof handler === 'function') {
    ReflectApply(handler, this, args);
  } else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      ReflectApply(listeners[i], this, args);
  }

  return true;
};

function _addListener(target, type, listener, prepend) {
  var m;
  var events;
  var existing;

  checkListener(listener);

  events = target._events;
  if (events === undefined) {
    events = target._events = Object.create(null);
    target._eventsCount = 0;
  } else {
    // To avoid recursion in the case that type === "newListener"! Before
    // adding it to the listeners, first emit "newListener".
    if (events.newListener !== undefined) {
      target.emit('newListener', type,
                  listener.listener ? listener.listener : listener);

      // Re-assign `events` because a newListener handler could have caused the
      // this._events to be assigned to a new object
      events = target._events;
    }
    existing = events[type];
  }

  if (existing === undefined) {
    // Optimize the case of one listener. Don't need the extra array object.
    existing = events[type] = listener;
    ++target._eventsCount;
  } else {
    if (typeof existing === 'function') {
      // Adding the second element, need to change to array.
      existing = events[type] =
        prepend ? [listener, existing] : [existing, listener];
      // If we've already got an array, just append.
    } else if (prepend) {
      existing.unshift(listener);
    } else {
      existing.push(listener);
    }

    // Check for listener leak
    m = _getMaxListeners(target);
    if (m > 0 && existing.length > m && !existing.warned) {
      existing.warned = true;
      // No error code for this since it is a Warning
      // eslint-disable-next-line no-restricted-syntax
      var w = new Error('Possible EventEmitter memory leak detected. ' +
                          existing.length + ' ' + String(type) + ' listeners ' +
                          'added. Use emitter.setMaxListeners() to ' +
                          'increase limit');
      w.name = 'MaxListenersExceededWarning';
      w.emitter = target;
      w.type = type;
      w.count = existing.length;
      ProcessEmitWarning(w);
    }
  }

  return target;
}

EventEmitter.prototype.addListener = function addListener(type, listener) {
  return _addListener(this, type, listener, false);
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.prependListener =
    function prependListener(type, listener) {
      return _addListener(this, type, listener, true);
    };

function onceWrapper() {
  if (!this.fired) {
    this.target.removeListener(this.type, this.wrapFn);
    this.fired = true;
    if (arguments.length === 0)
      return this.listener.call(this.target);
    return this.listener.apply(this.target, arguments);
  }
}

function _onceWrap(target, type, listener) {
  var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
  var wrapped = onceWrapper.bind(state);
  wrapped.listener = listener;
  state.wrapFn = wrapped;
  return wrapped;
}

EventEmitter.prototype.once = function once(type, listener) {
  checkListener(listener);
  this.on(type, _onceWrap(this, type, listener));
  return this;
};

EventEmitter.prototype.prependOnceListener =
    function prependOnceListener(type, listener) {
      checkListener(listener);
      this.prependListener(type, _onceWrap(this, type, listener));
      return this;
    };

// Emits a 'removeListener' event if and only if the listener was removed.
EventEmitter.prototype.removeListener =
    function removeListener(type, listener) {
      var list, events, position, i, originalListener;

      checkListener(listener);

      events = this._events;
      if (events === undefined)
        return this;

      list = events[type];
      if (list === undefined)
        return this;

      if (list === listener || list.listener === listener) {
        if (--this._eventsCount === 0)
          this._events = Object.create(null);
        else {
          delete events[type];
          if (events.removeListener)
            this.emit('removeListener', type, list.listener || listener);
        }
      } else if (typeof list !== 'function') {
        position = -1;

        for (i = list.length - 1; i >= 0; i--) {
          if (list[i] === listener || list[i].listener === listener) {
            originalListener = list[i].listener;
            position = i;
            break;
          }
        }

        if (position < 0)
          return this;

        if (position === 0)
          list.shift();
        else {
          spliceOne(list, position);
        }

        if (list.length === 1)
          events[type] = list[0];

        if (events.removeListener !== undefined)
          this.emit('removeListener', type, originalListener || listener);
      }

      return this;
    };

EventEmitter.prototype.off = EventEmitter.prototype.removeListener;

EventEmitter.prototype.removeAllListeners =
    function removeAllListeners(type) {
      var listeners, events, i;

      events = this._events;
      if (events === undefined)
        return this;

      // not listening for removeListener, no need to emit
      if (events.removeListener === undefined) {
        if (arguments.length === 0) {
          this._events = Object.create(null);
          this._eventsCount = 0;
        } else if (events[type] !== undefined) {
          if (--this._eventsCount === 0)
            this._events = Object.create(null);
          else
            delete events[type];
        }
        return this;
      }

      // emit removeListener for all listeners on all events
      if (arguments.length === 0) {
        var keys = Object.keys(events);
        var key;
        for (i = 0; i < keys.length; ++i) {
          key = keys[i];
          if (key === 'removeListener') continue;
          this.removeAllListeners(key);
        }
        this.removeAllListeners('removeListener');
        this._events = Object.create(null);
        this._eventsCount = 0;
        return this;
      }

      listeners = events[type];

      if (typeof listeners === 'function') {
        this.removeListener(type, listeners);
      } else if (listeners !== undefined) {
        // LIFO order
        for (i = listeners.length - 1; i >= 0; i--) {
          this.removeListener(type, listeners[i]);
        }
      }

      return this;
    };

function _listeners(target, type, unwrap) {
  var events = target._events;

  if (events === undefined)
    return [];

  var evlistener = events[type];
  if (evlistener === undefined)
    return [];

  if (typeof evlistener === 'function')
    return unwrap ? [evlistener.listener || evlistener] : [evlistener];

  return unwrap ?
    unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
}

EventEmitter.prototype.listeners = function listeners(type) {
  return _listeners(this, type, true);
};

EventEmitter.prototype.rawListeners = function rawListeners(type) {
  return _listeners(this, type, false);
};

EventEmitter.listenerCount = function(emitter, type) {
  if (typeof emitter.listenerCount === 'function') {
    return emitter.listenerCount(type);
  } else {
    return listenerCount.call(emitter, type);
  }
};

EventEmitter.prototype.listenerCount = listenerCount;
function listenerCount(type) {
  var events = this._events;

  if (events !== undefined) {
    var evlistener = events[type];

    if (typeof evlistener === 'function') {
      return 1;
    } else if (evlistener !== undefined) {
      return evlistener.length;
    }
  }

  return 0;
}

EventEmitter.prototype.eventNames = function eventNames() {
  return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
};

function arrayClone(arr, n) {
  var copy = new Array(n);
  for (var i = 0; i < n; ++i)
    copy[i] = arr[i];
  return copy;
}

function spliceOne(list, index) {
  for (; index + 1 < list.length; index++)
    list[index] = list[index + 1];
  list.pop();
}

function unwrapListeners(arr) {
  var ret = new Array(arr.length);
  for (var i = 0; i < ret.length; ++i) {
    ret[i] = arr[i].listener || arr[i];
  }
  return ret;
}

function once(emitter, name) {
  return new Promise(function (resolve, reject) {
    function errorListener(err) {
      emitter.removeListener(name, resolver);
      reject(err);
    }

    function resolver() {
      if (typeof emitter.removeListener === 'function') {
        emitter.removeListener('error', errorListener);
      }
      resolve([].slice.call(arguments));
    };

    eventTargetAgnosticAddListener(emitter, name, resolver, { once: true });
    if (name !== 'error') {
      addErrorHandlerIfEventEmitter(emitter, errorListener, { once: true });
    }
  });
}

function addErrorHandlerIfEventEmitter(emitter, handler, flags) {
  if (typeof emitter.on === 'function') {
    eventTargetAgnosticAddListener(emitter, 'error', handler, flags);
  }
}

function eventTargetAgnosticAddListener(emitter, name, listener, flags) {
  if (typeof emitter.on === 'function') {
    if (flags.once) {
      emitter.once(name, listener);
    } else {
      emitter.on(name, listener);
    }
  } else if (typeof emitter.addEventListener === 'function') {
    // EventTarget does not have `error` event semantics like Node
    // EventEmitters, we do not listen for `error` events here.
    emitter.addEventListener(name, function wrapListener(arg) {
      // IE does not have builtin `{ once: true }` support so we
      // have to do it manually.
      if (flags.once) {
        emitter.removeEventListener(name, wrapListener);
      }
      listener(arg);
    });
  } else {
    throw new TypeError('The "emitter" argument must be of type EventEmitter. Received type ' + typeof emitter);
  }
}

},{}],7:[function(reqqq,module,exports){
'use strict'

var mergeDescriptors = reqqq('merge-descriptors')
var isObject = reqqq('is-object')
var hasOwnProperty = Object.prototype.hasOwnProperty

function fill (destination, source, merge) {
  if (destination && (isObject(source) || isFunction(source))) {
    merge(destination, source, false)
    if (isFunction(destination) && isFunction(source) && source.prototype) {
      merge(destination.prototype, source.prototype, false)
    }
  }
  return destination
}

exports = module.exports = function fillKeys (destination, source) {
  return fill(destination, source, mergeDescriptors)
}

exports.es3 = function fillKeysEs3 (destination, source) {
  return fill(destination, source, es3Merge)
}

function es3Merge (destination, source) {
  for (var key in source) {
    if (!hasOwnProperty.call(destination, key)) {
      destination[key] = source[key]
    }
  }
  return destination
}

function isFunction (value) {
  return typeof value === 'function'
}

},{"is-object":11,"merge-descriptors":17}],8:[function(reqqq,module,exports){
var http = reqqq('http')
var url = reqqq('url')

var https = module.exports

for (var key in http) {
  if (http.hasOwnProperty(key)) https[key] = http[key]
}

https.request = function (params, cb) {
  params = validateParams(params)
  return http.request.call(this, params, cb)
}

https.get = function (params, cb) {
  params = validateParams(params)
  return http.get.call(this, params, cb)
}

function validateParams (params) {
  if (typeof params === 'string') {
    params = url.parse(params)
  }
  if (!params.protocol) {
    params.protocol = 'https:'
  }
  if (params.protocol !== 'https:') {
    throw new Error('Protocol "' + params.protocol + '" not supported. Expected "https:"')
  }
  return params
}

},{"http":43,"url":64}],9:[function(reqqq,module,exports){
/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
exports.read = function (buffer, offset, isLE, mLen, nBytes) {
  var e, m
  var eLen = (nBytes * 8) - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var nBits = -7
  var i = isLE ? (nBytes - 1) : 0
  var d = isLE ? -1 : 1
  var s = buffer[offset + i]

  i += d

  e = s & ((1 << (-nBits)) - 1)
  s >>= (-nBits)
  nBits += eLen
  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}

  m = e & ((1 << (-nBits)) - 1)
  e >>= (-nBits)
  nBits += mLen
  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}

  if (e === 0) {
    e = 1 - eBias
  } else if (e === eMax) {
    return m ? NaN : ((s ? -1 : 1) * Infinity)
  } else {
    m = m + Math.pow(2, mLen)
    e = e - eBias
  }
  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}

exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
  var e, m, c
  var eLen = (nBytes * 8) - mLen - 1
  var eMax = (1 << eLen) - 1
  var eBias = eMax >> 1
  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
  var i = isLE ? 0 : (nBytes - 1)
  var d = isLE ? 1 : -1
  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0

  value = Math.abs(value)

  if (isNaN(value) || value === Infinity) {
    m = isNaN(value) ? 1 : 0
    e = eMax
  } else {
    e = Math.floor(Math.log(value) / Math.LN2)
    if (value * (c = Math.pow(2, -e)) < 1) {
      e--
      c *= 2
    }
    if (e + eBias >= 1) {
      value += rt / c
    } else {
      value += rt * Math.pow(2, 1 - eBias)
    }
    if (value * c >= 2) {
      e++
      c /= 2
    }

    if (e + eBias >= eMax) {
      m = 0
      e = eMax
    } else if (e + eBias >= 1) {
      m = ((value * c) - 1) * Math.pow(2, mLen)
      e = e + eBias
    } else {
      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
      e = 0
    }
  }

  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

  e = (e << mLen) | m
  eLen += mLen
  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

  buffer[offset + i - d] |= s * 128
}

},{}],10:[function(reqqq,module,exports){
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    if (superCtor) {
      ctor.super_ = superCtor
      ctor.prototype = Object.create(superCtor.prototype, {
        constructor: {
          value: ctor,
          enumerable: false,
          writable: true,
          configurable: true
        }
      })
    }
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    if (superCtor) {
      ctor.super_ = superCtor
      var TempCtor = function () {}
      TempCtor.prototype = superCtor.prototype
      ctor.prototype = new TempCtor()
      ctor.prototype.constructor = ctor
    }
  }
}

},{}],11:[function(reqqq,module,exports){
'use strict';

module.exports = function isObject(x) {
	return typeof x === 'object' && x !== null;
};

},{}],12:[function(reqqq,module,exports){
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const stream_1 = reqqq("stream");
const sax_1 = __importDefault(reqqq("sax"));
const parse_time_1 = reqqq("./parse-time");
/**
 * A wrapper around sax that emits segments.
 */
class DashMPDParser extends stream_1.Writable {
    constructor(targetID) {
        super();
        this._parser = sax_1.default.createStream(false, { lowercase: true });
        this._parser.on('error', this.destroy.bind(this));
        let lastTag;
        let currtime = 0;
        let seq = 0;
        let segmentTemplate;
        let timescale, offset, duration, baseURL;
        let timeline = [];
        let getSegments = false;
        let gotSegments = false;
        let isStatic;
        let treeLevel;
        let periodStart;
        const tmpl = (str) => {
            const context = {
                RepresentationID: targetID,
                Number: seq,
                Time: currtime,
            };
            return str.replace(/\$(\w+)\$/g, (m, p1) => `${context[p1]}`);
        };
        this._parser.on('opentag', node => {
            switch (node.name) {
                case 'mpd':
                    currtime =
                        node.attributes.availabilitystarttime ?
                            new Date(node.attributes.availabilitystarttime).getTime() : 0;
                    isStatic = node.attributes.type !== 'dynamic';
                    break;
                case 'period':
                    // Reset everything on <Period> tag.
                    seq = 0;
                    timescale = 1000;
                    duration = 0;
                    offset = 0;
                    baseURL = [];
                    treeLevel = 0;
                    periodStart = parse_time_1.durationStr(node.attributes.start) || 0;
                    break;
                case 'segmentlist':
                    seq = parseInt(node.attributes.startnumber) || seq;
                    timescale = parseInt(node.attributes.timescale) || timescale;
                    duration = parseInt(node.attributes.duration) || duration;
                    offset = parseInt(node.attributes.presentationtimeoffset) || offset;
                    break;
                case 'segmenttemplate':
                    segmentTemplate = node.attributes;
                    seq = parseInt(node.attributes.startnumber) || seq;
                    timescale = parseInt(node.attributes.timescale) || timescale;
                    break;
                case 'segmenttimeline':
                case 'baseurl':
                    lastTag = node.name;
                    break;
                case 's':
                    timeline.push({
                        duration: parseInt(node.attributes.d),
                        repeat: parseInt(node.attributes.r),
                        time: parseInt(node.attributes.t),
                    });
                    break;
                case 'adaptationset':
                case 'representation':
                    treeLevel++;
                    if (!targetID) {
                        targetID = node.attributes.id;
                    }
                    getSegments = node.attributes.id === `${targetID}`;
                    if (getSegments) {
                        if (periodStart) {
                            currtime += periodStart;
                        }
                        if (offset) {
                            currtime -= offset / timescale * 1000;
                        }
                        this.emit('starttime', currtime);
                    }
                    break;
                case 'initialization':
                    if (getSegments) {
                        this.emit('item', {
                            url: baseURL.filter(s => !!s).join('') + node.attributes.sourceurl,
                            seq: seq,
                            init: true,
                            duration: 0,
                        });
                    }
                    break;
                case 'segmenturl':
                    if (getSegments) {
                        gotSegments = true;
                        let tl = timeline.shift();
                        let segmentDuration = ((tl === null || tl === void 0 ? void 0 : tl.duration) || duration) / timescale * 1000;
                        this.emit('item', {
                            url: baseURL.filter(s => !!s).join('') + node.attributes.media,
                            seq: seq++,
                            duration: segmentDuration,
                        });
                        currtime += segmentDuration;
                    }
                    break;
            }
        });
        const onEnd = () => {
            if (isStatic) {
                this.emit('endlist');
            }
            if (!getSegments) {
                this.destroy(Error(`Representation '${targetID}' not found`));
            }
            else {
                this.emit('end');
            }
        };
        this._parser.on('closetag', tagName => {
            switch (tagName) {
                case 'adaptationset':
                case 'representation':
                    treeLevel--;
                    if (segmentTemplate && timeline.length) {
                        gotSegments = true;
                        if (segmentTemplate.initialization) {
                            this.emit('item', {
                                url: baseURL.filter(s => !!s).join('') +
                                    tmpl(segmentTemplate.initialization),
                                seq: seq,
                                init: true,
                                duration: 0,
                            });
                        }
                        for (let { duration: itemDuration, repeat, time } of timeline) {
                            itemDuration = itemDuration / timescale * 1000;
                            repeat = repeat || 1;
                            currtime = time || currtime;
                            for (let i = 0; i < repeat; i++) {
                                this.emit('item', {
                                    url: baseURL.filter(s => !!s).join('') +
                                        tmpl(segmentTemplate.media),
                                    seq: seq++,
                                    duration: itemDuration,
                                });
                                currtime += itemDuration;
                            }
                        }
                    }
                    if (gotSegments) {
                        this.emit('endearly');
                        onEnd();
                        this._parser.removeAllListeners();
                        this.removeAllListeners('finish');
                    }
                    break;
            }
        });
        this._parser.on('text', text => {
            if (lastTag === 'baseurl') {
                baseURL[treeLevel] = text;
                lastTag = null;
            }
        });
        this.on('finish', onEnd);
    }
    _write(chunk, encoding, callback) {
        this._parser.write(chunk);
        callback();
    }
}
exports.default = DashMPDParser;

},{"./parse-time":15,"sax":27,"stream":28}],13:[function(reqqq,module,exports){
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
const stream_1 = reqqq("stream");
const miniget_1 = __importDefault(reqqq("miniget"));
const m3u8_parser_1 = __importDefault(reqqq("./m3u8-parser"));
const dash_mpd_parser_1 = __importDefault(reqqq("./dash-mpd-parser"));
const queue_1 = reqqq("./queue");
const parse_time_1 = reqqq("./parse-time");
const supportedParsers = {
    m3u8: m3u8_parser_1.default,
    'dash-mpd': dash_mpd_parser_1.default,
};
let m3u8stream = ((playlistURL, options = {}) => {
    const stream = new stream_1.PassThrough({ highWaterMark: options.highWaterMark });
    const chunkReadahead = options.chunkReadahead || 3;
    // 20 seconds.
    const liveBuffer = options.liveBuffer || 20000;
    const requestOptions = options.requestOptions;
    const Parser = supportedParsers[options.parser || (/\.mpd$/.test(playlistURL) ? 'dash-mpd' : 'm3u8')];
    if (!Parser) {
        throw TypeError(`parser '${options.parser}' not supported`);
    }
    let begin = 0;
    if (typeof options.begin !== 'undefined') {
        begin = typeof options.begin === 'string' ?
            parse_time_1.humanStr(options.begin) :
            Math.max(options.begin - liveBuffer, 0);
    }
    const forwardEvents = (req) => {
        for (let event of ['abort', 'request', 'response', 'redirect', 'retry', 'reconnect']) {
            req.on(event, stream.emit.bind(stream, event));
        }
    };
    let currSegment;
    const streamQueue = new queue_1.Queue((req, callback) => {
        currSegment = req;
        // Count the size manually, since the `content-length` header is not
        // always there.
        let size = 0;
        req.on('data', (chunk) => size += chunk.length);
        req.pipe(stream, { end: false });
        req.on('end', () => callback(null, size));
    }, { concurrency: 1 });
    let segmentNumber = 0;
    let downloaded = 0;
    const requestQueue = new queue_1.Queue((segment, callback) => {
        let reqOptions = Object.assign({}, requestOptions);
        if (segment.range) {
            reqOptions.headers = Object.assign({}, reqOptions.headers, {
                Range: `bytes=${segment.range.start}-${segment.range.end}`,
            });
        }
        let req = miniget_1.default(new URL(segment.url, playlistURL).toString(), reqOptions);
        req.on('error', callback);
        forwardEvents(req);
        streamQueue.push(req, (_, size) => {
            downloaded += +size;
            stream.emit('progress', {
                num: ++segmentNumber,
                size: size,
                duration: segment.duration,
                url: segment.url,
            }, requestQueue.total, downloaded);
            callback(null);
        });
    }, { concurrency: chunkReadahead });
    const onError = (err) => {
        stream.emit('error', err);
        // Stop on any error.
        stream.end();
    };
    // When to look for items again.
    let refreshThreshold;
    let minRefreshTime;
    let refreshTimeout;
    let fetchingPlaylist = true;
    let ended = false;
    let isStatic = false;
    let lastRefresh;
    const onQueuedEnd = (err) => {
        currSegment = null;
        if (err) {
            onError(err);
        }
        else if (!fetchingPlaylist && !ended && !isStatic &&
            requestQueue.tasks.length + requestQueue.active <= refreshThreshold) {
            let ms = Math.max(0, minRefreshTime - (Date.now() - lastRefresh));
            fetchingPlaylist = true;
            refreshTimeout = setTimeout(refreshPlaylist, ms);
        }
        else if ((ended || isStatic) &&
            !requestQueue.tasks.length && !requestQueue.active) {
            stream.end();
        }
    };
    let currPlaylist;
    let lastSeq;
    let starttime = 0;
    const refreshPlaylist = () => {
        lastRefresh = Date.now();
        currPlaylist = miniget_1.default(playlistURL, requestOptions);
        currPlaylist.on('error', onError);
        forwardEvents(currPlaylist);
        const parser = currPlaylist.pipe(new Parser(options.id));
        parser.on('starttime', (a) => {
            if (starttime) {
                return;
            }
            starttime = a;
            if (typeof options.begin === 'string' && begin >= 0) {
                begin += starttime;
            }
        });
        parser.on('endlist', () => { isStatic = true; });
        parser.on('endearly', currPlaylist.unpipe.bind(currPlaylist, parser));
        let addedItems = [];
        const addItem = (item) => {
            if (!item.init) {
                if (item.seq <= lastSeq) {
                    return;
                }
                lastSeq = item.seq;
            }
            begin = item.time;
            requestQueue.push(item, onQueuedEnd);
            addedItems.push(item);
        };
        let tailedItems = [], tailedItemsDuration = 0;
        parser.on('item', (item) => {
            let timedItem = Object.assign({ time: starttime }, item);
            if (begin <= timedItem.time) {
                addItem(timedItem);
            }
            else {
                tailedItems.push(timedItem);
                tailedItemsDuration += timedItem.duration;
                // Only keep the last `liveBuffer` of items.
                while (tailedItems.length > 1 &&
                    tailedItemsDuration - tailedItems[0].duration > liveBuffer) {
                    const lastItem = tailedItems.shift();
                    tailedItemsDuration -= lastItem.duration;
                }
            }
            starttime += timedItem.duration;
        });
        parser.on('end', () => {
            currPlaylist = null;
            // If we are too ahead of the stream, make sure to get the
            // latest available items with a small buffer.
            if (!addedItems.length && tailedItems.length) {
                tailedItems.forEach(item => { addItem(item); });
            }
            // Refresh the playlist when remaining segments get low.
            refreshThreshold = Math.max(1, Math.ceil(addedItems.length * 0.01));
            // Throttle refreshing the playlist by looking at the duration
            // of live items added on this refresh.
            minRefreshTime =
                addedItems.reduce((total, item) => item.duration + total, 0);
            fetchingPlaylist = false;
            onQueuedEnd(null);
        });
    };
    refreshPlaylist();
    stream.end = () => {
        ended = true;
        streamQueue.die();
        requestQueue.die();
        clearTimeout(refreshTimeout);
        currPlaylist === null || currPlaylist === void 0 ? void 0 : currPlaylist.destroy();
        currSegment === null || currSegment === void 0 ? void 0 : currSegment.destroy();
        stream_1.PassThrough.prototype.end.call(stream, null);
        return stream;
    };
    return stream;
});
m3u8stream.parseTimestamp = parse_time_1.humanStr;
module.exports = m3u8stream;

},{"./dash-mpd-parser":12,"./m3u8-parser":14,"./parse-time":15,"./queue":16,"miniget":18,"stream":28}],14:[function(reqqq,module,exports){
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const stream_1 = reqqq("stream");
/**
 * A very simple m3u8 playlist file parser that detects tags and segments.
 */
class m3u8Parser extends stream_1.Writable {
    constructor() {
        super();
        this._lastLine = '';
        this._seq = 0;
        this._nextItemDuration = null;
        this._nextItemRange = null;
        this._lastItemRangeEnd = 0;
        this.on('finish', () => {
            this._parseLine(this._lastLine);
            this.emit('end');
        });
    }
    _parseAttrList(value) {
        let attrs = {};
        let regex = /([A-Z0-9-]+)=(?:"([^"]*?)"|([^,]*?))/g;
        let match;
        while ((match = regex.exec(value)) !== null) {
            attrs[match[1]] = match[2] || match[3];
        }
        return attrs;
    }
    _parseRange(value) {
        if (!value)
            return null;
        let svalue = value.split('@');
        let start = svalue[1] ? parseInt(svalue[1]) : this._lastItemRangeEnd + 1;
        let end = start + parseInt(svalue[0]) - 1;
        let range = { start, end };
        this._lastItemRangeEnd = range.end;
        return range;
    }
    _parseLine(line) {
        let match = line.match(/^#(EXT[A-Z0-9-]+)(?::(.*))?/);
        if (match) {
            // This is a tag.
            const tag = match[1];
            const value = match[2] || '';
            switch (tag) {
                case 'EXT-X-PROGRAM-DATE-TIME':
                    this.emit('starttime', new Date(value).getTime());
                    break;
                case 'EXT-X-MEDIA-SEQUENCE':
                    this._seq = parseInt(value);
                    break;
                case 'EXT-X-MAP': {
                    let attrs = this._parseAttrList(value);
                    if (!attrs.URI) {
                        this.destroy(new Error('`EXT-X-MAP` found without reqqqd attribute `URI`'));
                        return;
                    }
                    this.emit('item', {
                        url: attrs.URI,
                        seq: this._seq,
                        init: true,
                        duration: 0,
                        range: this._parseRange(attrs.BYTERANGE),
                    });
                    break;
                }
                case 'EXT-X-BYTERANGE': {
                    this._nextItemRange = this._parseRange(value);
                    break;
                }
                case 'EXTINF':
                    this._nextItemDuration =
                        Math.round(parseFloat(value.split(',')[0]) * 1000);
                    break;
                case 'EXT-X-ENDLIST':
                    this.emit('endlist');
                    break;
            }
        }
        else if (!/^#/.test(line) && line.trim()) {
            // This is a segment
            this.emit('item', {
                url: line.trim(),
                seq: this._seq++,
                duration: this._nextItemDuration,
                range: this._nextItemRange,
            });
            this._nextItemRange = null;
        }
    }
    _write(chunk, encoding, callback) {
        let lines = chunk.toString('utf8').split('\n');
        if (this._lastLine) {
            lines[0] = this._lastLine + lines[0];
        }
        lines.forEach((line, i) => {
            if (this.destroyed)
                return;
            if (i < lines.length - 1) {
                this._parseLine(line);
            }
            else {
                // Save the last line in case it has been broken up.
                this._lastLine = line;
            }
        });
        callback();
    }
}
exports.default = m3u8Parser;

},{"stream":28}],15:[function(reqqq,module,exports){
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.durationStr = exports.humanStr = void 0;
const numberFormat = /^\d+$/;
const timeFormat = /^(?:(?:(\d+):)?(\d{1,2}):)?(\d{1,2})(?:\.(\d{3}))?$/;
const timeUnits = {
    ms: 1,
    s: 1000,
    m: 60000,
    h: 3600000,
};
/**
 * Converts human friendly time to milliseconds. Supports the format
 * 00:00:00.000 for hours, minutes, seconds, and milliseconds respectively.
 * And 0ms, 0s, 0m, 0h, and together 1m1s.
 *
 * @param {number|string} time
 * @returns {number}
 */
exports.humanStr = (time) => {
    if (typeof time === 'number') {
        return time;
    }
    if (numberFormat.test(time)) {
        return +time;
    }
    const firstFormat = timeFormat.exec(time);
    if (firstFormat) {
        return (+(firstFormat[1] || 0) * timeUnits.h) +
            (+(firstFormat[2] || 0) * timeUnits.m) +
            (+firstFormat[3] * timeUnits.s) +
            +(firstFormat[4] || 0);
    }
    else {
        let total = 0;
        const r = /(-?\d+)(ms|s|m|h)/g;
        let rs;
        while ((rs = r.exec(time)) !== null) {
            total += +rs[1] * timeUnits[rs[2]];
        }
        return total;
    }
};
/**
 * Parses a duration string in the form of "123.456S", returns milliseconds.
 *
 * @param {string} time
 * @returns {number}
 */
exports.durationStr = (time) => {
    let total = 0;
    const r = /(\d+(?:\.\d+)?)(S|M|H)/g;
    let rs;
    while ((rs = r.exec(time)) !== null) {
        total += +rs[1] * timeUnits[rs[2].toLowerCase()];
    }
    return total;
};

},{}],16:[function(reqqq,module,exports){
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Queue = void 0;
class Queue {
    /**
     * A really simple queue with concurrency.
     *
     * @param {Function} worker
     * @param {Object} options
     * @param {!number} options.concurrency
     */
    constructor(worker, options = {}) {
        this._worker = worker;
        this._concurrency = options.concurrency || 1;
        this.tasks = [];
        this.total = 0;
        this.active = 0;
    }
    /**
     * Push a task to the queue.
     *
     *  @param {T} item
     *  @param {!Function} callback
     */
    push(item, callback) {
        this.tasks.push({ item, callback });
        this.total++;
        this._next();
    }
    /**
     * Process next job in queue.
     */
    _next() {
        if (this.active >= this._concurrency || !this.tasks.length) {
            return;
        }
        const { item, callback } = this.tasks.shift();
        let callbackCalled = false;
        this.active++;
        this._worker(item, (err, result) => {
            if (callbackCalled) {
                return;
            }
            this.active--;
            callbackCalled = true;
            callback === null || callback === void 0 ? void 0 : callback(err, result);
            this._next();
        });
    }
    /**
     * Stops processing queued jobs.
     */
    die() {
        this.tasks = [];
    }
}
exports.Queue = Queue;

},{}],17:[function(reqqq,module,exports){
/*!
 * merge-descriptors
 * Copyright(c) 2014 Jonathan Ong
 * Copyright(c) 2015 Douglas Christopher Wilson
 * MIT Licensed
 */

'use strict'

/**
 * Module exports.
 * @public
 */

module.exports = merge

/**
 * Module variables.
 * @private
 */

var hasOwnProperty = Object.prototype.hasOwnProperty

/**
 * Merge the property descriptors of `src` into `dest`
 *
 * @param {object} dest Object to add descriptors to
 * @param {object} src Object to clone descriptors from
 * @param {boolean} [redefine=true] Redefine `dest` properties with `src` properties
 * @returns {object} Reference to dest
 * @public
 */

function merge(dest, src, redefine) {
  if (!dest) {
    throw new TypeError('argument dest is reqqqd')
  }

  if (!src) {
    throw new TypeError('argument src is reqqqd')
  }

  if (redefine === undefined) {
    // Default to true
    redefine = true
  }

  Object.getOwnPropertyNames(src).forEach(function forEachOwnPropertyName(name) {
    if (!redefine && hasOwnProperty.call(dest, name)) {
      // Skip desriptor
      return
    }

    // Copy descriptor
    var descriptor = Object.getOwnPropertyDescriptor(src, name)
    Object.defineProperty(dest, name, descriptor)
  })

  return dest
}

},{}],18:[function(reqqq,module,exports){
(function (process){(function (){
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
const http_1 = __importDefault(reqqq("http"));
const https_1 = __importDefault(reqqq("https"));
const stream_1 = reqqq("stream");
const httpLibs = { 'http:': http_1.default, 'https:': https_1.default };
const redirectStatusCodes = new Set([301, 302, 303, 307, 308]);
const retryStatusCodes = new Set([429, 503]);
// `request`, `response`, `abort`, left out, miniget will emit these.
const requestEvents = ['connect', 'continue', 'information', 'socket', 'timeout', 'upgrade'];
const responseEvents = ['aborted'];
Miniget.MinigetError = class MinigetError extends Error {
    constructor(message, statusCode) {
        super(message);
        this.statusCode = statusCode;
    }
};
Miniget.defaultOptions = {
    maxRedirects: 10,
    maxRetries: 2,
    maxReconnects: 0,
    backoff: { inc: 100, max: 10000 },
};
function Miniget(url, options = {}) {
    var _a;
    const opts = Object.assign({}, Miniget.defaultOptions, options);
    const stream = new stream_1.PassThrough({ highWaterMark: opts.highWaterMark });
    stream.destroyed = stream.aborted = false;
    let activeRequest;
    let activeResponse;
    let activeDecodedStream;
    let redirects = 0;
    let retries = 0;
    let retryTimeout;
    let reconnects = 0;
    let contentLength;
    let acceptRanges = false;
    let rangeStart = 0, rangeEnd;
    let downloaded = 0;
    // Check if this is a ranged request.
    if ((_a = opts.headers) === null || _a === void 0 ? void 0 : _a.Range) {
        let r = /bytes=(\d+)-(\d+)?/.exec(`${opts.headers.Range}`);
        if (r) {
            rangeStart = parseInt(r[1], 10);
            rangeEnd = parseInt(r[2], 10);
        }
    }
    // Add `Accept-Encoding` header.
    if (opts.acceptEncoding) {
        opts.headers = Object.assign({
            'Accept-Encoding': Object.keys(opts.acceptEncoding).join(', '),
        }, opts.headers);
    }
    const downloadHasStarted = () => activeDecodedStream && downloaded > 0;
    const downloadComplete = () => !acceptRanges || downloaded === contentLength;
    const reconnect = (err) => {
        activeDecodedStream = null;
        retries = 0;
        let inc = opts.backoff.inc;
        let ms = Math.min(inc, opts.backoff.max);
        retryTimeout = setTimeout(doDownload, ms);
        stream.emit('reconnect', reconnects, err);
    };
    const reconnectIfEndedEarly = (err) => {
        if (options.method !== 'HEAD' && !downloadComplete() && reconnects++ < opts.maxReconnects) {
            reconnect(err);
            return true;
        }
        return false;
    };
    const retryRequest = (retryOptions) => {
        if (stream.destroyed) {
            return false;
        }
        if (downloadHasStarted()) {
            return reconnectIfEndedEarly(retryOptions.err);
        }
        else if ((!retryOptions.err || retryOptions.err.message === 'ENOTFOUND') &&
            retries++ < opts.maxRetries) {
            let ms = retryOptions.retryAfter ||
                Math.min(retries * opts.backoff.inc, opts.backoff.max);
            retryTimeout = setTimeout(doDownload, ms);
            stream.emit('retry', retries, retryOptions.err);
            return true;
        }
        return false;
    };
    const forwardEvents = (ee, events) => {
        for (let event of events) {
            ee.on(event, stream.emit.bind(stream, event));
        }
    };
    const doDownload = () => {
        let parsed = {}, httpLib;
        try {
            let urlObj = typeof url === 'string' ? new URL(url) : url;
            parsed = Object.assign({}, {
                host: urlObj.host,
                hostname: urlObj.hostname,
                path: urlObj.pathname + urlObj.search + urlObj.hash,
                port: urlObj.port,
                protocol: urlObj.protocol,
            });
            if (urlObj.username) {
                parsed.auth = `${urlObj.username}:${urlObj.password}`;
            }
            httpLib = httpLibs[String(parsed.protocol)];
        }
        catch (err) {
            // Let the error be caught by the if statement below.
        }
        if (!httpLib) {
            stream.emit('error', new Miniget.MinigetError(`Invalid URL: ${url}`));
            return;
        }
        Object.assign(parsed, opts);
        if (acceptRanges && downloaded > 0) {
            let start = downloaded + rangeStart;
            let end = rangeEnd || '';
            parsed.headers = Object.assign({}, parsed.headers, {
                Range: `bytes=${start}-${end}`,
            });
        }
        if (opts.transform) {
            try {
                parsed = opts.transform(parsed);
            }
            catch (err) {
                stream.emit('error', err);
                return;
            }
            if (!parsed || parsed.protocol) {
                httpLib = httpLibs[String(parsed === null || parsed === void 0 ? void 0 : parsed.protocol)];
                if (!httpLib) {
                    stream.emit('error', new Miniget.MinigetError('Invalid URL object from `transform` function'));
                    return;
                }
            }
        }
        const onError = (err) => {
            if (stream.destroyed || stream.readableEnded) {
                return;
            }
            cleanup();
            if (!retryRequest({ err })) {
                stream.emit('error', err);
            }
            else {
                activeRequest.removeListener('close', onRequestClose);
            }
        };
        const onRequestClose = () => {
            cleanup();
            retryRequest({});
        };
        const cleanup = () => {
            activeRequest.removeListener('close', onRequestClose);
            activeResponse === null || activeResponse === void 0 ? void 0 : activeResponse.removeListener('data', onData);
            activeDecodedStream === null || activeDecodedStream === void 0 ? void 0 : activeDecodedStream.removeListener('end', onEnd);
        };
        const onData = (chunk) => { downloaded += chunk.length; };
        const onEnd = () => {
            cleanup();
            if (!reconnectIfEndedEarly()) {
                stream.end();
            }
        };
        activeRequest = httpLib.request(parsed, (res) => {
            // Needed for node v10, v12.
            // istanbul ignore next
            if (stream.destroyed) {
                return;
            }
            if (redirectStatusCodes.has(res.statusCode)) {
                if (redirects++ >= opts.maxRedirects) {
                    stream.emit('error', new Miniget.MinigetError('Too many redirects'));
                }
                else {
                    if (res.headers.location) {
                        url = res.headers.location;
                    }
                    else {
                        let err = new Miniget.MinigetError('Redirect status code given with no location', res.statusCode);
                        stream.emit('error', err);
                        cleanup();
                        return;
                    }
                    setTimeout(doDownload, parseInt(res.headers['retry-after'] || '0', 10) * 1000);
                    stream.emit('redirect', url);
                }
                cleanup();
                return;
                // Check for rate limiting.
            }
            else if (retryStatusCodes.has(res.statusCode)) {
                if (!retryRequest({ retryAfter: parseInt(res.headers['retry-after'] || '0', 10) })) {
                    let err = new Miniget.MinigetError(`Status code: ${res.statusCode}`, res.statusCode);
                    stream.emit('error', err);
                }
                cleanup();
                return;
            }
            else if (res.statusCode && (res.statusCode < 200 || res.statusCode >= 400)) {
                let err = new Miniget.MinigetError(`Status code: ${res.statusCode}`, res.statusCode);
                if (res.statusCode >= 500) {
                    onError(err);
                }
                else {
                    stream.emit('error', err);
                }
                cleanup();
                return;
            }
            activeDecodedStream = res;
            if (opts.acceptEncoding && res.headers['content-encoding']) {
                for (let enc of res.headers['content-encoding'].split(', ').reverse()) {
                    let fn = opts.acceptEncoding[enc];
                    if (fn) {
                        activeDecodedStream = activeDecodedStream.pipe(fn());
                        activeDecodedStream.on('error', onError);
                    }
                }
            }
            if (!contentLength) {
                contentLength = parseInt(`${res.headers['content-length']}`, 10);
                acceptRanges = res.headers['accept-ranges'] === 'bytes' &&
                    contentLength > 0 && opts.maxReconnects > 0;
            }
            res.on('data', onData);
            activeDecodedStream.on('end', onEnd);
            activeDecodedStream.pipe(stream, { end: !acceptRanges });
            activeResponse = res;
            stream.emit('response', res);
            res.on('error', onError);
            forwardEvents(res, responseEvents);
        });
        activeRequest.on('error', onError);
        activeRequest.on('close', onRequestClose);
        forwardEvents(activeRequest, requestEvents);
        if (stream.destroyed) {
            streamDestroy(...destroyArgs);
        }
        stream.emit('request', activeRequest);
        activeRequest.end();
    };
    stream.abort = (err) => {
        console.warn('`MinigetStream#abort()` has been deprecated in favor of `MinigetStream#destroy()`');
        stream.aborted = true;
        stream.emit('abort');
        stream.destroy(err);
    };
    let destroyArgs;
    const streamDestroy = (err) => {
        activeRequest.destroy(err);
        activeDecodedStream === null || activeDecodedStream === void 0 ? void 0 : activeDecodedStream.unpipe(stream);
        activeDecodedStream === null || activeDecodedStream === void 0 ? void 0 : activeDecodedStream.destroy();
        clearTimeout(retryTimeout);
    };
    stream._destroy = (...args) => {
        stream.destroyed = true;
        if (activeRequest) {
            streamDestroy(...args);
        }
        else {
            destroyArgs = args;
        }
    };
    stream.text = () => new Promise((resolve, reject) => {
        let body = '';
        stream.setEncoding('utf8');
        stream.on('data', chunk => body += chunk);
        stream.on('end', () => resolve(body));
        stream.on('error', reject);
    });
    process.nextTick(doDownload);
    return stream;
}
module.exports = Miniget;

}).call(this)}).call(this,reqqq('_process'))
},{"_process":20,"http":43,"https":8,"stream":28}],19:[function(reqqq,module,exports){
'use strict'

module.exports = function createNotFoundError (path) {
  var err = new Error('Cannot find module \'' + path + '\'')
  err.code = 'MODULE_NOT_FOUND'
  return err
}

},{}],20:[function(reqqq,module,exports){
// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;

process.listeners = function (name) { return [] }

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],21:[function(reqqq,module,exports){
'use strict';

var fillMissingKeys = reqqq('fill-keys');
var moduleNotFoundError = reqqq('module-not-found-error');

function ProxyquireifyError(msg) {
  this.name = 'ProxyquireifyError';
  Error.captureStackTrace(this, ProxyquireifyError);
  this.message = msg || 'An error occurred inside proxyquireify.';
}

function validateArguments(request, stubs) {
  var msg = (function getMessage() {
    if (!request)
      return 'Missing argument: "request". Need it to resolve desired module.';

    if (!stubs)
      return 'Missing argument: "stubs". If no stubbing is needed, use regular reqqq instead.';

    if (typeof request != 'string')
      return 'Invalid argument: "request". Needs to be a requirable string that is the module to load.';

    if (typeof stubs != 'object')
      return 'Invalid argument: "stubs". Needs to be an object containing overrides e.g., {"path": { extname: function () { ... } } }.';
  })();

  if (msg) throw new ProxyquireifyError(msg);
}

var stubs;

function stub(stubs_) {
  stubs = stubs_;
  // This cache is used by the prelude as an alternative to the regular cache.
  // It is not read or written here, except to set it to an empty object when
  // adding stubs and to reset it to null when clearing stubs.
  module.exports._cache = {};
}

function reset() {
  stubs = undefined;
  module.exports._cache = null;
}

var proxyquire = module.exports = function (reqqq_) {
  if (typeof reqqq_ != 'function')
    throw new ProxyquireifyError(
        'It seems like you didn\'t initialize proxyquireify with the reqqq in your test.\n'
      + 'Make sure to correct this, i.e.: "var proxyquire = reqqq(\'proxyquireify\')(reqqq);"'
    );

  reset();

  return function(request, stubs) {

    validateArguments(request, stubs);

    // set the stubs and reqqq dependency
    // when stub reqqq is invoked by the module under test it will find the stubs here
    stub(stubs);
    var dep = reqqq_(request);
    reset();

    return dep;
  };
};

// Start with the default cache
proxyquire._cache = null;

proxyquire._proxy = function (reqqq_, request) {
  function original() {
    return reqqq_(request);
  }

  if (!stubs || !stubs.hasOwnProperty(request)) return original();

  var stub = stubs[request];

  if (stub === null) throw moduleNotFoundError(request)

  var stubWideNoCallThru = Boolean(stubs['@noCallThru']) && (stub == null || stub['@noCallThru'] !== false);
  var noCallThru = stubWideNoCallThru || (stub != null && Boolean(stub['@noCallThru']));
  return noCallThru ? stub : fillMissingKeys(stub, original());
};

if (reqqq.cache) {
  // only used during build, so prevent browserify from including it
  var replacePreludePath = './lib/replace-prelude';
  var replacePrelude = reqqq(replacePreludePath);
  proxyquire.browserify = replacePrelude.browserify;
  proxyquire.plugin = replacePrelude.plugin;
}

},{"fill-keys":7,"module-not-found-error":19}],22:[function(reqqq,module,exports){
(function (global){(function (){
/*! https://mths.be/punycode v1.4.1 by @mathias */
;(function(root) {

	/** Detect free variables */
	var freeExports = typeof exports == 'object' && exports &&
		!exports.nodeType && exports;
	var freeModule = typeof module == 'object' && module &&
		!module.nodeType && module;
	var freeGlobal = typeof global == 'object' && global;
	if (
		freeGlobal.global === freeGlobal ||
		freeGlobal.window === freeGlobal ||
		freeGlobal.self === freeGlobal
	) {
		root = freeGlobal;
	}

	/**
	 * The `punycode` object.
	 * @name punycode
	 * @type Object
	 */
	var punycode,

	/** Highest positive signed 32-bit float value */
	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1

	/** Bootstring parameters */
	base = 36,
	tMin = 1,
	tMax = 26,
	skew = 38,
	damp = 700,
	initialBias = 72,
	initialN = 128, // 0x80
	delimiter = '-', // '\x2D'

	/** Regular expressions */
	regexPunycode = /^xn--/,
	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators

	/** Error messages */
	errors = {
		'overflow': 'Overflow: input needs wider integers to process',
		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
		'invalid-input': 'Invalid input'
	},

	/** Convenience shortcuts */
	baseMinusTMin = base - tMin,
	floor = Math.floor,
	stringFromCharCode = String.fromCharCode,

	/** Temporary variable */
	key;

	/*--------------------------------------------------------------------------*/

	/**
	 * A generic error utility function.
	 * @private
	 * @param {String} type The error type.
	 * @returns {Error} Throws a `RangeError` with the applicable error message.
	 */
	function error(type) {
		throw new RangeError(errors[type]);
	}

	/**
	 * A generic `Array#map` utility function.
	 * @private
	 * @param {Array} array The array to iterate over.
	 * @param {Function} callback The function that gets called for every array
	 * item.
	 * @returns {Array} A new array of values returned by the callback function.
	 */
	function map(array, fn) {
		var length = array.length;
		var result = [];
		while (length--) {
			result[length] = fn(array[length]);
		}
		return result;
	}

	/**
	 * A simple `Array#map`-like wrapper to work with domain name strings or email
	 * addresses.
	 * @private
	 * @param {String} domain The domain name or email address.
	 * @param {Function} callback The function that gets called for every
	 * character.
	 * @returns {Array} A new string of characters returned by the callback
	 * function.
	 */
	function mapDomain(string, fn) {
		var parts = string.split('@');
		var result = '';
		if (parts.length > 1) {
			// In email addresses, only the domain name should be punycoded. Leave
			// the local part (i.e. everything up to `@`) intact.
			result = parts[0] + '@';
			string = parts[1];
		}
		// Avoid `split(regex)` for IE8 compatibility. See #17.
		string = string.replace(regexSeparators, '\x2E');
		var labels = string.split('.');
		var encoded = map(labels, fn).join('.');
		return result + encoded;
	}

	/**
	 * Creates an array containing the numeric code points of each Unicode
	 * character in the string. While JavaScript uses UCS-2 internally,
	 * this function will convert a pair of surrogate halves (each of which
	 * UCS-2 exposes as separate characters) into a single code point,
	 * matching UTF-16.
	 * @see `punycode.ucs2.encode`
	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
	 * @memberOf punycode.ucs2
	 * @name decode
	 * @param {String} string The Unicode input string (UCS-2).
	 * @returns {Array} The new array of code points.
	 */
	function ucs2decode(string) {
		var output = [],
		    counter = 0,
		    length = string.length,
		    value,
		    extra;
		while (counter < length) {
			value = string.charCodeAt(counter++);
			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
				// high surrogate, and there is a next character
				extra = string.charCodeAt(counter++);
				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
				} else {
					// unmatched surrogate; only append this code unit, in case the next
					// code unit is the high surrogate of a surrogate pair
					output.push(value);
					counter--;
				}
			} else {
				output.push(value);
			}
		}
		return output;
	}

	/**
	 * Creates a string based on an array of numeric code points.
	 * @see `punycode.ucs2.decode`
	 * @memberOf punycode.ucs2
	 * @name encode
	 * @param {Array} codePoints The array of numeric code points.
	 * @returns {String} The new Unicode string (UCS-2).
	 */
	function ucs2encode(array) {
		return map(array, function(value) {
			var output = '';
			if (value > 0xFFFF) {
				value -= 0x10000;
				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
				value = 0xDC00 | value & 0x3FF;
			}
			output += stringFromCharCode(value);
			return output;
		}).join('');
	}

	/**
	 * Converts a basic code point into a digit/integer.
	 * @see `digitToBasic()`
	 * @private
	 * @param {Number} codePoint The basic numeric code point value.
	 * @returns {Number} The numeric value of a basic code point (for use in
	 * representing integers) in the range `0` to `base - 1`, or `base` if
	 * the code point does not represent a value.
	 */
	function basicToDigit(codePoint) {
		if (codePoint - 48 < 10) {
			return codePoint - 22;
		}
		if (codePoint - 65 < 26) {
			return codePoint - 65;
		}
		if (codePoint - 97 < 26) {
			return codePoint - 97;
		}
		return base;
	}

	/**
	 * Converts a digit/integer into a basic code point.
	 * @see `basicToDigit()`
	 * @private
	 * @param {Number} digit The numeric value of a basic code point.
	 * @returns {Number} The basic code point whose value (when used for
	 * representing integers) is `digit`, which needs to be in the range
	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
	 * used; else, the lowercase form is used. The behavior is undefined
	 * if `flag` is non-zero and `digit` has no uppercase form.
	 */
	function digitToBasic(digit, flag) {
		//  0..25 map to ASCII a..z or A..Z
		// 26..35 map to ASCII 0..9
		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
	}

	/**
	 * Bias adaptation function as per section 3.4 of RFC 3492.
	 * https://tools.ietf.org/html/rfc3492#section-3.4
	 * @private
	 */
	function adapt(delta, numPoints, firstTime) {
		var k = 0;
		delta = firstTime ? floor(delta / damp) : delta >> 1;
		delta += floor(delta / numPoints);
		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
			delta = floor(delta / baseMinusTMin);
		}
		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
	}

	/**
	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
	 * symbols.
	 * @memberOf punycode
	 * @param {String} input The Punycode string of ASCII-only symbols.
	 * @returns {String} The resulting string of Unicode symbols.
	 */
	function decode(input) {
		// Don't use UCS-2
		var output = [],
		    inputLength = input.length,
		    out,
		    i = 0,
		    n = initialN,
		    bias = initialBias,
		    basic,
		    j,
		    index,
		    oldi,
		    w,
		    k,
		    digit,
		    t,
		    /** Cached calculation results */
		    baseMinusT;

		// Handle the basic code points: let `basic` be the number of input code
		// points before the last delimiter, or `0` if there is none, then copy
		// the first basic code points to the output.

		basic = input.lastIndexOf(delimiter);
		if (basic < 0) {
			basic = 0;
		}

		for (j = 0; j < basic; ++j) {
			// if it's not a basic code point
			if (input.charCodeAt(j) >= 0x80) {
				error('not-basic');
			}
			output.push(input.charCodeAt(j));
		}

		// Main decoding loop: start just after the last delimiter if any basic code
		// points were copied; start at the beginning otherwise.

		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {

			// `index` is the index of the next character to be consumed.
			// Decode a generalized variable-length integer into `delta`,
			// which gets added to `i`. The overflow checking is easier
			// if we increase `i` as we go, then subtract off its starting
			// value at the end to obtain `delta`.
			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {

				if (index >= inputLength) {
					error('invalid-input');
				}

				digit = basicToDigit(input.charCodeAt(index++));

				if (digit >= base || digit > floor((maxInt - i) / w)) {
					error('overflow');
				}

				i += digit * w;
				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);

				if (digit < t) {
					break;
				}

				baseMinusT = base - t;
				if (w > floor(maxInt / baseMinusT)) {
					error('overflow');
				}

				w *= baseMinusT;

			}

			out = output.length + 1;
			bias = adapt(i - oldi, out, oldi == 0);

			// `i` was supposed to wrap around from `out` to `0`,
			// incrementing `n` each time, so we'll fix that now:
			if (floor(i / out) > maxInt - n) {
				error('overflow');
			}

			n += floor(i / out);
			i %= out;

			// Insert `n` at position `i` of the output
			output.splice(i++, 0, n);

		}

		return ucs2encode(output);
	}

	/**
	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
	 * Punycode string of ASCII-only symbols.
	 * @memberOf punycode
	 * @param {String} input The string of Unicode symbols.
	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
	 */
	function encode(input) {
		var n,
		    delta,
		    handledCPCount,
		    basicLength,
		    bias,
		    j,
		    m,
		    q,
		    k,
		    t,
		    currentValue,
		    output = [],
		    /** `inputLength` will hold the number of code points in `input`. */
		    inputLength,
		    /** Cached calculation results */
		    handledCPCountPlusOne,
		    baseMinusT,
		    qMinusT;

		// Convert the input in UCS-2 to Unicode
		input = ucs2decode(input);

		// Cache the length
		inputLength = input.length;

		// Initialize the state
		n = initialN;
		delta = 0;
		bias = initialBias;

		// Handle the basic code points
		for (j = 0; j < inputLength; ++j) {
			currentValue = input[j];
			if (currentValue < 0x80) {
				output.push(stringFromCharCode(currentValue));
			}
		}

		handledCPCount = basicLength = output.length;

		// `handledCPCount` is the number of code points that have been handled;
		// `basicLength` is the number of basic code points.

		// Finish the basic string - if it is not empty - with a delimiter
		if (basicLength) {
			output.push(delimiter);
		}

		// Main encoding loop:
		while (handledCPCount < inputLength) {

			// All non-basic code points < n have been handled already. Find the next
			// larger one:
			for (m = maxInt, j = 0; j < inputLength; ++j) {
				currentValue = input[j];
				if (currentValue >= n && currentValue < m) {
					m = currentValue;
				}
			}

			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
			// but guard against overflow
			handledCPCountPlusOne = handledCPCount + 1;
			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
				error('overflow');
			}

			delta += (m - n) * handledCPCountPlusOne;
			n = m;

			for (j = 0; j < inputLength; ++j) {
				currentValue = input[j];

				if (currentValue < n && ++delta > maxInt) {
					error('overflow');
				}

				if (currentValue == n) {
					// Represent delta as a generalized variable-length integer
					for (q = delta, k = base; /* no condition */; k += base) {
						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
						if (q < t) {
							break;
						}
						qMinusT = q - t;
						baseMinusT = base - t;
						output.push(
							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
						);
						q = floor(qMinusT / baseMinusT);
					}

					output.push(stringFromCharCode(digitToBasic(q, 0)));
					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
					delta = 0;
					++handledCPCount;
				}
			}

			++delta;
			++n;

		}
		return output.join('');
	}

	/**
	 * Converts a Punycode string representing a domain name or an email address
	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
	 * it doesn't matter if you call it on a string that has already been
	 * converted to Unicode.
	 * @memberOf punycode
	 * @param {String} input The Punycoded domain name or email address to
	 * convert to Unicode.
	 * @returns {String} The Unicode representation of the given Punycode
	 * string.
	 */
	function toUnicode(input) {
		return mapDomain(input, function(string) {
			return regexPunycode.test(string)
				? decode(string.slice(4).toLowerCase())
				: string;
		});
	}

	/**
	 * Converts a Unicode string representing a domain name or an email address to
	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
	 * i.e. it doesn't matter if you call it with a domain that's already in
	 * ASCII.
	 * @memberOf punycode
	 * @param {String} input The domain name or email address to convert, as a
	 * Unicode string.
	 * @returns {String} The Punycode representation of the given domain name or
	 * email address.
	 */
	function toASCII(input) {
		return mapDomain(input, function(string) {
			return regexNonASCII.test(string)
				? 'xn--' + encode(string)
				: string;
		});
	}

	/*--------------------------------------------------------------------------*/

	/** Define the public API */
	punycode = {
		/**
		 * A string representing the current Punycode.js version number.
		 * @memberOf punycode
		 * @type String
		 */
		'version': '1.4.1',
		/**
		 * An object of methods to convert from JavaScript's internal character
		 * representation (UCS-2) to Unicode code points, and back.
		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
		 * @memberOf punycode
		 * @type Object
		 */
		'ucs2': {
			'decode': ucs2decode,
			'encode': ucs2encode
		},
		'decode': decode,
		'encode': encode,
		'toASCII': toASCII,
		'toUnicode': toUnicode
	};

	/** Expose `punycode` */
	// Some AMD build optimizers, like r.js, check for specific condition patterns
	// like the following:
	if (
		typeof define == 'function' &&
		typeof define.amd == 'object' &&
		define.amd
	) {
		define('punycode', function() {
			return punycode;
		});
	} else if (freeExports && freeModule) {
		if (module.exports == freeExports) {
			// in Node.js, io.js, or RingoJS v0.8.0+
			freeModule.exports = punycode;
		} else {
			// in Narwhal or RingoJS v0.7.0-
			for (key in punycode) {
				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
			}
		}
	} else {
		// in Rhino or a web browser
		root.punycode = punycode;
	}

}(this));

}).call(this)}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],23:[function(reqqq,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

// If obj.hasOwnProperty has been overridden, then calling
// obj.hasOwnProperty(prop) will break.
// See: https://github.com/joyent/node/issues/1707
function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}

module.exports = function(qs, sep, eq, options) {
  sep = sep || '&';
  eq = eq || '=';
  var obj = {};

  if (typeof qs !== 'string' || qs.length === 0) {
    return obj;
  }

  var regexp = /\+/g;
  qs = qs.split(sep);

  var maxKeys = 1000;
  if (options && typeof options.maxKeys === 'number') {
    maxKeys = options.maxKeys;
  }

  var len = qs.length;
  // maxKeys <= 0 means that we should not limit keys count
  if (maxKeys > 0 && len > maxKeys) {
    len = maxKeys;
  }

  for (var i = 0; i < len; ++i) {
    var x = qs[i].replace(regexp, '%20'),
        idx = x.indexOf(eq),
        kstr, vstr, k, v;

    if (idx >= 0) {
      kstr = x.substr(0, idx);
      vstr = x.substr(idx + 1);
    } else {
      kstr = x;
      vstr = '';
    }

    k = decodeURIComponent(kstr);
    v = decodeURIComponent(vstr);

    if (!hasOwnProperty(obj, k)) {
      obj[k] = v;
    } else if (isArray(obj[k])) {
      obj[k].push(v);
    } else {
      obj[k] = [obj[k], v];
    }
  }

  return obj;
};

var isArray = Array.isArray || function (xs) {
  return Object.prototype.toString.call(xs) === '[object Array]';
};

},{}],24:[function(reqqq,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

var stringifyPrimitive = function(v) {
  switch (typeof v) {
    case 'string':
      return v;

    case 'boolean':
      return v ? 'true' : 'false';

    case 'number':
      return isFinite(v) ? v : '';

    default:
      return '';
  }
};

module.exports = function(obj, sep, eq, name) {
  sep = sep || '&';
  eq = eq || '=';
  if (obj === null) {
    obj = undefined;
  }

  if (typeof obj === 'object') {
    return map(objectKeys(obj), function(k) {
      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
      if (isArray(obj[k])) {
        return map(obj[k], function(v) {
          return ks + encodeURIComponent(stringifyPrimitive(v));
        }).join(sep);
      } else {
        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
      }
    }).join(sep);

  }

  if (!name) return '';
  return encodeURIComponent(stringifyPrimitive(name)) + eq +
         encodeURIComponent(stringifyPrimitive(obj));
};

var isArray = Array.isArray || function (xs) {
  return Object.prototype.toString.call(xs) === '[object Array]';
};

function map (xs, f) {
  if (xs.map) return xs.map(f);
  var res = [];
  for (var i = 0; i < xs.length; i++) {
    res.push(f(xs[i], i));
  }
  return res;
}

var objectKeys = Object.keys || function (obj) {
  var res = [];
  for (var key in obj) {
    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);
  }
  return res;
};

},{}],25:[function(reqqq,module,exports){
'use strict';

exports.decode = exports.parse = reqqq('./decode');
exports.encode = exports.stringify = reqqq('./encode');

},{"./decode":23,"./encode":24}],26:[function(reqqq,module,exports){
/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
/* eslint-disable node/no-deprecated-api */
var buffer = reqqq('buffer')
var Buffer = buffer.Buffer

// alternative to using Object.keys for old browsers
function copyProps (src, dst) {
  for (var key in src) {
    dst[key] = src[key]
  }
}
if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
  module.exports = buffer
} else {
  // Copy properties from reqqq('buffer')
  copyProps(buffer, exports)
  exports.Buffer = SafeBuffer
}

function SafeBuffer (arg, encodingOrOffset, length) {
  return Buffer(arg, encodingOrOffset, length)
}

SafeBuffer.prototype = Object.create(Buffer.prototype)

// Copy static methods from Buffer
copyProps(Buffer, SafeBuffer)

SafeBuffer.from = function (arg, encodingOrOffset, length) {
  if (typeof arg === 'number') {
    throw new TypeError('Argument must not be a number')
  }
  return Buffer(arg, encodingOrOffset, length)
}

SafeBuffer.alloc = function (size, fill, encoding) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number')
  }
  var buf = Buffer(size)
  if (fill !== undefined) {
    if (typeof encoding === 'string') {
      buf.fill(fill, encoding)
    } else {
      buf.fill(fill)
    }
  } else {
    buf.fill(0)
  }
  return buf
}

SafeBuffer.allocUnsafe = function (size) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number')
  }
  return Buffer(size)
}

SafeBuffer.allocUnsafeSlow = function (size) {
  if (typeof size !== 'number') {
    throw new TypeError('Argument must be a number')
  }
  return buffer.SlowBuffer(size)
}

},{"buffer":4}],27:[function(reqqq,module,exports){
(function (Buffer){(function (){
;(function (sax) { // wrapper for non-node envs
  sax.parser = function (strict, opt) { return new SAXParser(strict, opt) }
  sax.SAXParser = SAXParser
  sax.SAXStream = SAXStream
  sax.createStream = createStream

  // When we pass the MAX_BUFFER_LENGTH position, start checking for buffer overruns.
  // When we check, schedule the next check for MAX_BUFFER_LENGTH - (max(buffer lengths)),
  // since that's the earliest that a buffer overrun could occur.  This way, checks are
  // as rare as reqqqd, but as often as necessary to ensure never crossing this bound.
  // Furthermore, buffers are only tested at most once per write(), so passing a very
  // large string into write() might have undesirable effects, but this is manageable by
  // the caller, so it is assumed to be safe.  Thus, a call to write() may, in the extreme
  // edge case, result in creating at most one complete copy of the string passed in.
  // Set to Infinity to have unlimited buffers.
  sax.MAX_BUFFER_LENGTH = 64 * 1024

  var buffers = [
    'comment', 'sgmlDecl', 'textNode', 'tagName', 'doctype',
    'procInstName', 'procInstBody', 'entity', 'attribName',
    'attribValue', 'cdata', 'script'
  ]

  sax.EVENTS = [
    'text',
    'processinginstruction',
    'sgmldeclaration',
    'doctype',
    'comment',
    'opentagstart',
    'attribute',
    'opentag',
    'closetag',
    'opencdata',
    'cdata',
    'closecdata',
    'error',
    'end',
    'ready',
    'script',
    'opennamespace',
    'closenamespace'
  ]

  function SAXParser (strict, opt) {
    if (!(this instanceof SAXParser)) {
      return new SAXParser(strict, opt)
    }

    var parser = this
    clearBuffers(parser)
    parser.q = parser.c = ''
    parser.bufferCheckPosition = sax.MAX_BUFFER_LENGTH
    parser.opt = opt || {}
    parser.opt.lowercase = parser.opt.lowercase || parser.opt.lowercasetags
    parser.looseCase = parser.opt.lowercase ? 'toLowerCase' : 'toUpperCase'
    parser.tags = []
    parser.closed = parser.closedRoot = parser.sawRoot = false
    parser.tag = parser.error = null
    parser.strict = !!strict
    parser.noscript = !!(strict || parser.opt.noscript)
    parser.state = S.BEGIN
    parser.strictEntities = parser.opt.strictEntities
    parser.ENTITIES = parser.strictEntities ? Object.create(sax.XML_ENTITIES) : Object.create(sax.ENTITIES)
    parser.attribList = []

    // namespaces form a prototype chain.
    // it always points at the current tag,
    // which protos to its parent tag.
    if (parser.opt.xmlns) {
      parser.ns = Object.create(rootNS)
    }

    // mostly just for error reporting
    parser.trackPosition = parser.opt.position !== false
    if (parser.trackPosition) {
      parser.position = parser.line = parser.column = 0
    }
    emit(parser, 'onready')
  }

  if (!Object.create) {
    Object.create = function (o) {
      function F () {}
      F.prototype = o
      var newf = new F()
      return newf
    }
  }

  if (!Object.keys) {
    Object.keys = function (o) {
      var a = []
      for (var i in o) if (o.hasOwnProperty(i)) a.push(i)
      return a
    }
  }

  function checkBufferLength (parser) {
    var maxAllowed = Math.max(sax.MAX_BUFFER_LENGTH, 10)
    var maxActual = 0
    for (var i = 0, l = buffers.length; i < l; i++) {
      var len = parser[buffers[i]].length
      if (len > maxAllowed) {
        // Text/cdata nodes can get big, and since they're buffered,
        // we can get here under normal conditions.
        // Avoid issues by emitting the text node now,
        // so at least it won't get any bigger.
        switch (buffers[i]) {
          case 'textNode':
            closeText(parser)
            break

          case 'cdata':
            emitNode(parser, 'oncdata', parser.cdata)
            parser.cdata = ''
            break

          case 'script':
            emitNode(parser, 'onscript', parser.script)
            parser.script = ''
            break

          default:
            error(parser, 'Max buffer length exceeded: ' + buffers[i])
        }
      }
      maxActual = Math.max(maxActual, len)
    }
    // schedule the next check for the earliest possible buffer overrun.
    var m = sax.MAX_BUFFER_LENGTH - maxActual
    parser.bufferCheckPosition = m + parser.position
  }

  function clearBuffers (parser) {
    for (var i = 0, l = buffers.length; i < l; i++) {
      parser[buffers[i]] = ''
    }
  }

  function flushBuffers (parser) {
    closeText(parser)
    if (parser.cdata !== '') {
      emitNode(parser, 'oncdata', parser.cdata)
      parser.cdata = ''
    }
    if (parser.script !== '') {
      emitNode(parser, 'onscript', parser.script)
      parser.script = ''
    }
  }

  SAXParser.prototype = {
    end: function () { end(this) },
    write: write,
    resume: function () { this.error = null; return this },
    close: function () { return this.write(null) },
    flush: function () { flushBuffers(this) }
  }

  var Stream
  try {
    Stream = reqqq('stream').Stream
  } catch (ex) {
    Stream = function () {}
  }

  var streamWraps = sax.EVENTS.filter(function (ev) {
    return ev !== 'error' && ev !== 'end'
  })

  function createStream (strict, opt) {
    return new SAXStream(strict, opt)
  }

  function SAXStream (strict, opt) {
    if (!(this instanceof SAXStream)) {
      return new SAXStream(strict, opt)
    }

    Stream.apply(this)

    this._parser = new SAXParser(strict, opt)
    this.writable = true
    this.readable = true

    var me = this

    this._parser.onend = function () {
      me.emit('end')
    }

    this._parser.onerror = function (er) {
      me.emit('error', er)

      // if didn't throw, then means error was handled.
      // go ahead and clear error, so we can write again.
      me._parser.error = null
    }

    this._decoder = null

    streamWraps.forEach(function (ev) {
      Object.defineProperty(me, 'on' + ev, {
        get: function () {
          return me._parser['on' + ev]
        },
        set: function (h) {
          if (!h) {
            me.removeAllListeners(ev)
            me._parser['on' + ev] = h
            return h
          }
          me.on(ev, h)
        },
        enumerable: true,
        configurable: false
      })
    })
  }

  SAXStream.prototype = Object.create(Stream.prototype, {
    constructor: {
      value: SAXStream
    }
  })

  SAXStream.prototype.write = function (data) {
    if (typeof Buffer === 'function' &&
      typeof Buffer.isBuffer === 'function' &&
      Buffer.isBuffer(data)) {
      if (!this._decoder) {
        var SD = reqqq('string_decoder').StringDecoder
        this._decoder = new SD('utf8')
      }
      data = this._decoder.write(data)
    }

    this._parser.write(data.toString())
    this.emit('data', data)
    return true
  }

  SAXStream.prototype.end = function (chunk) {
    if (chunk && chunk.length) {
      this.write(chunk)
    }
    this._parser.end()
    return true
  }

  SAXStream.prototype.on = function (ev, handler) {
    var me = this
    if (!me._parser['on' + ev] && streamWraps.indexOf(ev) !== -1) {
      me._parser['on' + ev] = function () {
        var args = arguments.length === 1 ? [arguments[0]] : Array.apply(null, arguments)
        args.splice(0, 0, ev)
        me.emit.apply(me, args)
      }
    }

    return Stream.prototype.on.call(me, ev, handler)
  }

  // this really needs to be replaced with character classes.
  // XML allows all manner of ridiculous numbers and digits.
  var CDATA = '[CDATA['
  var DOCTYPE = 'DOCTYPE'
  var XML_NAMESPACE = 'http://www.w3.org/XML/1998/namespace'
  var XMLNS_NAMESPACE = 'http://www.w3.org/2000/xmlns/'
  var rootNS = { xml: XML_NAMESPACE, xmlns: XMLNS_NAMESPACE }

  // http://www.w3.org/TR/REC-xml/#NT-NameStartChar
  // This implementation works on strings, a single character at a time
  // as such, it cannot ever support astral-plane characters (10000-EFFFF)
  // without a significant breaking change to either this  parser, or the
  // JavaScript language.  Implementation of an emoji-capable xml parser
  // is left as an exercise for the reader.
  var nameStart = /[:_A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/

  var nameBody = /[:_A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD\u00B7\u0300-\u036F\u203F-\u2040.\d-]/

  var entityStart = /[#:_A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/
  var entityBody = /[#:_A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD\u00B7\u0300-\u036F\u203F-\u2040.\d-]/

  function isWhitespace (c) {
    return c === ' ' || c === '\n' || c === '\r' || c === '\t'
  }

  function isQuote (c) {
    return c === '"' || c === '\''
  }

  function isAttribEnd (c) {
    return c === '>' || isWhitespace(c)
  }

  function isMatch (regex, c) {
    return regex.test(c)
  }

  function notMatch (regex, c) {
    return !isMatch(regex, c)
  }

  var S = 0
  sax.STATE = {
    BEGIN: S++, // leading byte order mark or whitespace
    BEGIN_WHITESPACE: S++, // leading whitespace
    TEXT: S++, // general stuff
    TEXT_ENTITY: S++, // &amp and such.
    OPEN_WAKA: S++, // <
    SGML_DECL: S++, // <!BLARG
    SGML_DECL_QUOTED: S++, // <!BLARG foo "bar
    DOCTYPE: S++, // <!DOCTYPE
    DOCTYPE_QUOTED: S++, // <!DOCTYPE "//blah
    DOCTYPE_DTD: S++, // <!DOCTYPE "//blah" [ ...
    DOCTYPE_DTD_QUOTED: S++, // <!DOCTYPE "//blah" [ "foo
    COMMENT_STARTING: S++, // <!-
    COMMENT: S++, // <!--
    COMMENT_ENDING: S++, // <!-- blah -
    COMMENT_ENDED: S++, // <!-- blah --
    CDATA: S++, // <![CDATA[ something
    CDATA_ENDING: S++, // ]
    CDATA_ENDING_2: S++, // ]]
    PROC_INST: S++, // <?hi
    PROC_INST_BODY: S++, // <?hi there
    PROC_INST_ENDING: S++, // <?hi "there" ?
    OPEN_TAG: S++, // <strong
    OPEN_TAG_SLASH: S++, // <strong /
    ATTRIB: S++, // <a
    ATTRIB_NAME: S++, // <a foo
    ATTRIB_NAME_SAW_WHITE: S++, // <a foo _
    ATTRIB_VALUE: S++, // <a foo=
    ATTRIB_VALUE_QUOTED: S++, // <a foo="bar
    ATTRIB_VALUE_CLOSED: S++, // <a foo="bar"
    ATTRIB_VALUE_UNQUOTED: S++, // <a foo=bar
    ATTRIB_VALUE_ENTITY_Q: S++, // <foo bar="&quot;"
    ATTRIB_VALUE_ENTITY_U: S++, // <foo bar=&quot
    CLOSE_TAG: S++, // </a
    CLOSE_TAG_SAW_WHITE: S++, // </a   >
    SCRIPT: S++, // <script> ...
    SCRIPT_ENDING: S++ // <script> ... <
  }

  sax.XML_ENTITIES = {
    'amp': '&',
    'gt': '>',
    'lt': '<',
    'quot': '"',
    'apos': "'"
  }

  sax.ENTITIES = {
    'amp': '&',
    'gt': '>',
    'lt': '<',
    'quot': '"',
    'apos': "'",
    'AElig': 198,
    'Aacute': 193,
    'Acirc': 194,
    'Agrave': 192,
    'Aring': 197,
    'Atilde': 195,
    'Auml': 196,
    'Ccedil': 199,
    'ETH': 208,
    'Eacute': 201,
    'Ecirc': 202,
    'Egrave': 200,
    'Euml': 203,
    'Iacute': 205,
    'Icirc': 206,
    'Igrave': 204,
    'Iuml': 207,
    'Ntilde': 209,
    'Oacute': 211,
    'Ocirc': 212,
    'Ograve': 210,
    'Oslash': 216,
    'Otilde': 213,
    'Ouml': 214,
    'THORN': 222,
    'Uacute': 218,
    'Ucirc': 219,
    'Ugrave': 217,
    'Uuml': 220,
    'Yacute': 221,
    'aacute': 225,
    'acirc': 226,
    'aelig': 230,
    'agrave': 224,
    'aring': 229,
    'atilde': 227,
    'auml': 228,
    'ccedil': 231,
    'eacute': 233,
    'ecirc': 234,
    'egrave': 232,
    'eth': 240,
    'euml': 235,
    'iacute': 237,
    'icirc': 238,
    'igrave': 236,
    'iuml': 239,
    'ntilde': 241,
    'oacute': 243,
    'ocirc': 244,
    'ograve': 242,
    'oslash': 248,
    'otilde': 245,
    'ouml': 246,
    'szlig': 223,
    'thorn': 254,
    'uacute': 250,
    'ucirc': 251,
    'ugrave': 249,
    'uuml': 252,
    'yacute': 253,
    'yuml': 255,
    'copy': 169,
    'reg': 174,
    'nbsp': 160,
    'iexcl': 161,
    'cent': 162,
    'pound': 163,
    'curren': 164,
    'yen': 165,
    'brvbar': 166,
    'sect': 167,
    'uml': 168,
    'ordf': 170,
    'laquo': 171,
    'not': 172,
    'shy': 173,
    'macr': 175,
    'deg': 176,
    'plusmn': 177,
    'sup1': 185,
    'sup2': 178,
    'sup3': 179,
    'acute': 180,
    'micro': 181,
    'para': 182,
    'middot': 183,
    'cedil': 184,
    'ordm': 186,
    'raquo': 187,
    'frac14': 188,
    'frac12': 189,
    'frac34': 190,
    'iquest': 191,
    'times': 215,
    'divide': 247,
    'OElig': 338,
    'oelig': 339,
    'Scaron': 352,
    'scaron': 353,
    'Yuml': 376,
    'fnof': 402,
    'circ': 710,
    'tilde': 732,
    'Alpha': 913,
    'Beta': 914,
    'Gamma': 915,
    'Delta': 916,
    'Epsilon': 917,
    'Zeta': 918,
    'Eta': 919,
    'Theta': 920,
    'Iota': 921,
    'Kappa': 922,
    'Lambda': 923,
    'Mu': 924,
    'Nu': 925,
    'Xi': 926,
    'Omicron': 927,
    'Pi': 928,
    'Rho': 929,
    'Sigma': 931,
    'Tau': 932,
    'Upsilon': 933,
    'Phi': 934,
    'Chi': 935,
    'Psi': 936,
    'Omega': 937,
    'alpha': 945,
    'beta': 946,
    'gamma': 947,
    'delta': 948,
    'epsilon': 949,
    'zeta': 950,
    'eta': 951,
    'theta': 952,
    'iota': 953,
    'kappa': 954,
    'lambda': 955,
    'mu': 956,
    'nu': 957,
    'xi': 958,
    'omicron': 959,
    'pi': 960,
    'rho': 961,
    'sigmaf': 962,
    'sigma': 963,
    'tau': 964,
    'upsilon': 965,
    'phi': 966,
    'chi': 967,
    'psi': 968,
    'omega': 969,
    'thetasym': 977,
    'upsih': 978,
    'piv': 982,
    'ensp': 8194,
    'emsp': 8195,
    'thinsp': 8201,
    'zwnj': 8204,
    'zwj': 8205,
    'lrm': 8206,
    'rlm': 8207,
    'ndash': 8211,
    'mdash': 8212,
    'lsquo': 8216,
    'rsquo': 8217,
    'sbquo': 8218,
    'ldquo': 8220,
    'rdquo': 8221,
    'bdquo': 8222,
    'dagger': 8224,
    'Dagger': 8225,
    'bull': 8226,
    'hellip': 8230,
    'permil': 8240,
    'prime': 8242,
    'Prime': 8243,
    'lsaquo': 8249,
    'rsaquo': 8250,
    'oline': 8254,
    'frasl': 8260,
    'euro': 8364,
    'image': 8465,
    'weierp': 8472,
    'real': 8476,
    'trade': 8482,
    'alefsym': 8501,
    'larr': 8592,
    'uarr': 8593,
    'rarr': 8594,
    'darr': 8595,
    'harr': 8596,
    'crarr': 8629,
    'lArr': 8656,
    'uArr': 8657,
    'rArr': 8658,
    'dArr': 8659,
    'hArr': 8660,
    'forall': 8704,
    'part': 8706,
    'exist': 8707,
    'empty': 8709,
    'nabla': 8711,
    'isin': 8712,
    'notin': 8713,
    'ni': 8715,
    'prod': 8719,
    'sum': 8721,
    'minus': 8722,
    'lowast': 8727,
    'radic': 8730,
    'prop': 8733,
    'infin': 8734,
    'ang': 8736,
    'and': 8743,
    'or': 8744,
    'cap': 8745,
    'cup': 8746,
    'int': 8747,
    'there4': 8756,
    'sim': 8764,
    'cong': 8773,
    'asymp': 8776,
    'ne': 8800,
    'equiv': 8801,
    'le': 8804,
    'ge': 8805,
    'sub': 8834,
    'sup': 8835,
    'nsub': 8836,
    'sube': 8838,
    'supe': 8839,
    'oplus': 8853,
    'otimes': 8855,
    'perp': 8869,
    'sdot': 8901,
    'lceil': 8968,
    'rceil': 8969,
    'lfloor': 8970,
    'rfloor': 8971,
    'lang': 9001,
    'rang': 9002,
    'loz': 9674,
    'spades': 9824,
    'clubs': 9827,
    'hearts': 9829,
    'diams': 9830
  }

  Object.keys(sax.ENTITIES).forEach(function (key) {
    var e = sax.ENTITIES[key]
    var s = typeof e === 'number' ? String.fromCharCode(e) : e
    sax.ENTITIES[key] = s
  })

  for (var s in sax.STATE) {
    sax.STATE[sax.STATE[s]] = s
  }

  // shorthand
  S = sax.STATE

  function emit (parser, event, data) {
    parser[event] && parser[event](data)
  }

  function emitNode (parser, nodeType, data) {
    if (parser.textNode) closeText(parser)
    emit(parser, nodeType, data)
  }

  function closeText (parser) {
    parser.textNode = textopts(parser.opt, parser.textNode)
    if (parser.textNode) emit(parser, 'ontext', parser.textNode)
    parser.textNode = ''
  }

  function textopts (opt, text) {
    if (opt.trim) text = text.trim()
    if (opt.normalize) text = text.replace(/\s+/g, ' ')
    return text
  }

  function error (parser, er) {
    closeText(parser)
    if (parser.trackPosition) {
      er += '\nLine: ' + parser.line +
        '\nColumn: ' + parser.column +
        '\nChar: ' + parser.c
    }
    er = new Error(er)
    parser.error = er
    emit(parser, 'onerror', er)
    return parser
  }

  function end (parser) {
    if (parser.sawRoot && !parser.closedRoot) strictFail(parser, 'Unclosed root tag')
    if ((parser.state !== S.BEGIN) &&
      (parser.state !== S.BEGIN_WHITESPACE) &&
      (parser.state !== S.TEXT)) {
      error(parser, 'Unexpected end')
    }
    closeText(parser)
    parser.c = ''
    parser.closed = true
    emit(parser, 'onend')
    SAXParser.call(parser, parser.strict, parser.opt)
    return parser
  }

  function strictFail (parser, message) {
    if (typeof parser !== 'object' || !(parser instanceof SAXParser)) {
      throw new Error('bad call to strictFail')
    }
    if (parser.strict) {
      error(parser, message)
    }
  }

  function newTag (parser) {
    if (!parser.strict) parser.tagName = parser.tagName[parser.looseCase]()
    var parent = parser.tags[parser.tags.length - 1] || parser
    var tag = parser.tag = { name: parser.tagName, attributes: {} }

    // will be overridden if tag contails an xmlns="foo" or xmlns:foo="bar"
    if (parser.opt.xmlns) {
      tag.ns = parent.ns
    }
    parser.attribList.length = 0
    emitNode(parser, 'onopentagstart', tag)
  }

  function qname (name, attribute) {
    var i = name.indexOf(':')
    var qualName = i < 0 ? [ '', name ] : name.split(':')
    var prefix = qualName[0]
    var local = qualName[1]

    // <x "xmlns"="http://foo">
    if (attribute && name === 'xmlns') {
      prefix = 'xmlns'
      local = ''
    }

    return { prefix: prefix, local: local }
  }

  function attrib (parser) {
    if (!parser.strict) {
      parser.attribName = parser.attribName[parser.looseCase]()
    }

    if (parser.attribList.indexOf(parser.attribName) !== -1 ||
      parser.tag.attributes.hasOwnProperty(parser.attribName)) {
      parser.attribName = parser.attribValue = ''
      return
    }

    if (parser.opt.xmlns) {
      var qn = qname(parser.attribName, true)
      var prefix = qn.prefix
      var local = qn.local

      if (prefix === 'xmlns') {
        // namespace binding attribute. push the binding into scope
        if (local === 'xml' && parser.attribValue !== XML_NAMESPACE) {
          strictFail(parser,
            'xml: prefix must be bound to ' + XML_NAMESPACE + '\n' +
            'Actual: ' + parser.attribValue)
        } else if (local === 'xmlns' && parser.attribValue !== XMLNS_NAMESPACE) {
          strictFail(parser,
            'xmlns: prefix must be bound to ' + XMLNS_NAMESPACE + '\n' +
            'Actual: ' + parser.attribValue)
        } else {
          var tag = parser.tag
          var parent = parser.tags[parser.tags.length - 1] || parser
          if (tag.ns === parent.ns) {
            tag.ns = Object.create(parent.ns)
          }
          tag.ns[local] = parser.attribValue
        }
      }

      // defer onattribute events until all attributes have been seen
      // so any new bindings can take effect. preserve attribute order
      // so deferred events can be emitted in document order
      parser.attribList.push([parser.attribName, parser.attribValue])
    } else {
      // in non-xmlns mode, we can emit the event right away
      parser.tag.attributes[parser.attribName] = parser.attribValue
      emitNode(parser, 'onattribute', {
        name: parser.attribName,
        value: parser.attribValue
      })
    }

    parser.attribName = parser.attribValue = ''
  }

  function openTag (parser, selfClosing) {
    if (parser.opt.xmlns) {
      // emit namespace binding events
      var tag = parser.tag

      // add namespace info to tag
      var qn = qname(parser.tagName)
      tag.prefix = qn.prefix
      tag.local = qn.local
      tag.uri = tag.ns[qn.prefix] || ''

      if (tag.prefix && !tag.uri) {
        strictFail(parser, 'Unbound namespace prefix: ' +
          JSON.stringify(parser.tagName))
        tag.uri = qn.prefix
      }

      var parent = parser.tags[parser.tags.length - 1] || parser
      if (tag.ns && parent.ns !== tag.ns) {
        Object.keys(tag.ns).forEach(function (p) {
          emitNode(parser, 'onopennamespace', {
            prefix: p,
            uri: tag.ns[p]
          })
        })
      }

      // handle deferred onattribute events
      // Note: do not apply default ns to attributes:
      //   http://www.w3.org/TR/REC-xml-names/#defaulting
      for (var i = 0, l = parser.attribList.length; i < l; i++) {
        var nv = parser.attribList[i]
        var name = nv[0]
        var value = nv[1]
        var qualName = qname(name, true)
        var prefix = qualName.prefix
        var local = qualName.local
        var uri = prefix === '' ? '' : (tag.ns[prefix] || '')
        var a = {
          name: name,
          value: value,
          prefix: prefix,
          local: local,
          uri: uri
        }

        // if there's any attributes with an undefined namespace,
        // then fail on them now.
        if (prefix && prefix !== 'xmlns' && !uri) {
          strictFail(parser, 'Unbound namespace prefix: ' +
            JSON.stringify(prefix))
          a.uri = prefix
        }
        parser.tag.attributes[name] = a
        emitNode(parser, 'onattribute', a)
      }
      parser.attribList.length = 0
    }

    parser.tag.isSelfClosing = !!selfClosing

    // process the tag
    parser.sawRoot = true
    parser.tags.push(parser.tag)
    emitNode(parser, 'onopentag', parser.tag)
    if (!selfClosing) {
      // special case for <script> in non-strict mode.
      if (!parser.noscript && parser.tagName.toLowerCase() === 'script') {
        parser.state = S.SCRIPT
      } else {
        parser.state = S.TEXT
      }
      parser.tag = null
      parser.tagName = ''
    }
    parser.attribName = parser.attribValue = ''
    parser.attribList.length = 0
  }

  function closeTag (parser) {
    if (!parser.tagName) {
      strictFail(parser, 'Weird empty close tag.')
      parser.textNode += '</>'
      parser.state = S.TEXT
      return
    }

    if (parser.script) {
      if (parser.tagName !== 'script') {
        parser.script += '</' + parser.tagName + '>'
        parser.tagName = ''
        parser.state = S.SCRIPT
        return
      }
      emitNode(parser, 'onscript', parser.script)
      parser.script = ''
    }

    // first make sure that the closing tag actually exists.
    // <a><b></c></b></a> will close everything, otherwise.
    var t = parser.tags.length
    var tagName = parser.tagName
    if (!parser.strict) {
      tagName = tagName[parser.looseCase]()
    }
    var closeTo = tagName
    while (t--) {
      var close = parser.tags[t]
      if (close.name !== closeTo) {
        // fail the first time in strict mode
        strictFail(parser, 'Unexpected close tag')
      } else {
        break
      }
    }

    // didn't find it.  we already failed for strict, so just abort.
    if (t < 0) {
      strictFail(parser, 'Unmatched closing tag: ' + parser.tagName)
      parser.textNode += '</' + parser.tagName + '>'
      parser.state = S.TEXT
      return
    }
    parser.tagName = tagName
    var s = parser.tags.length
    while (s-- > t) {
      var tag = parser.tag = parser.tags.pop()
      parser.tagName = parser.tag.name
      emitNode(parser, 'onclosetag', parser.tagName)

      var x = {}
      for (var i in tag.ns) {
        x[i] = tag.ns[i]
      }

      var parent = parser.tags[parser.tags.length - 1] || parser
      if (parser.opt.xmlns && tag.ns !== parent.ns) {
        // remove namespace bindings introduced by tag
        Object.keys(tag.ns).forEach(function (p) {
          var n = tag.ns[p]
          emitNode(parser, 'onclosenamespace', { prefix: p, uri: n })
        })
      }
    }
    if (t === 0) parser.closedRoot = true
    parser.tagName = parser.attribValue = parser.attribName = ''
    parser.attribList.length = 0
    parser.state = S.TEXT
  }

  function parseEntity (parser) {
    var entity = parser.entity
    var entityLC = entity.toLowerCase()
    var num
    var numStr = ''

    if (parser.ENTITIES[entity]) {
      return parser.ENTITIES[entity]
    }
    if (parser.ENTITIES[entityLC]) {
      return parser.ENTITIES[entityLC]
    }
    entity = entityLC
    if (entity.charAt(0) === '#') {
      if (entity.charAt(1) === 'x') {
        entity = entity.slice(2)
        num = parseInt(entity, 16)
        numStr = num.toString(16)
      } else {
        entity = entity.slice(1)
        num = parseInt(entity, 10)
        numStr = num.toString(10)
      }
    }
    entity = entity.replace(/^0+/, '')
    if (isNaN(num) || numStr.toLowerCase() !== entity) {
      strictFail(parser, 'Invalid character entity')
      return '&' + parser.entity + ';'
    }

    return String.fromCodePoint(num)
  }

  function beginWhiteSpace (parser, c) {
    if (c === '<') {
      parser.state = S.OPEN_WAKA
      parser.startTagPosition = parser.position
    } else if (!isWhitespace(c)) {
      // have to process this as a text node.
      // weird, but happens.
      strictFail(parser, 'Non-whitespace before first tag.')
      parser.textNode = c
      parser.state = S.TEXT
    }
  }

  function charAt (chunk, i) {
    var result = ''
    if (i < chunk.length) {
      result = chunk.charAt(i)
    }
    return result
  }

  function write (chunk) {
    var parser = this
    if (this.error) {
      throw this.error
    }
    if (parser.closed) {
      return error(parser,
        'Cannot write after close. Assign an onready handler.')
    }
    if (chunk === null) {
      return end(parser)
    }
    if (typeof chunk === 'object') {
      chunk = chunk.toString()
    }
    var i = 0
    var c = ''
    while (true) {
      c = charAt(chunk, i++)
      parser.c = c

      if (!c) {
        break
      }

      if (parser.trackPosition) {
        parser.position++
        if (c === '\n') {
          parser.line++
          parser.column = 0
        } else {
          parser.column++
        }
      }

      switch (parser.state) {
        case S.BEGIN:
          parser.state = S.BEGIN_WHITESPACE
          if (c === '\uFEFF') {
            continue
          }
          beginWhiteSpace(parser, c)
          continue

        case S.BEGIN_WHITESPACE:
          beginWhiteSpace(parser, c)
          continue

        case S.TEXT:
          if (parser.sawRoot && !parser.closedRoot) {
            var starti = i - 1
            while (c && c !== '<' && c !== '&') {
              c = charAt(chunk, i++)
              if (c && parser.trackPosition) {
                parser.position++
                if (c === '\n') {
                  parser.line++
                  parser.column = 0
                } else {
                  parser.column++
                }
              }
            }
            parser.textNode += chunk.substring(starti, i - 1)
          }
          if (c === '<' && !(parser.sawRoot && parser.closedRoot && !parser.strict)) {
            parser.state = S.OPEN_WAKA
            parser.startTagPosition = parser.position
          } else {
            if (!isWhitespace(c) && (!parser.sawRoot || parser.closedRoot)) {
              strictFail(parser, 'Text data outside of root node.')
            }
            if (c === '&') {
              parser.state = S.TEXT_ENTITY
            } else {
              parser.textNode += c
            }
          }
          continue

        case S.SCRIPT:
          // only non-strict
          if (c === '<') {
            parser.state = S.SCRIPT_ENDING
          } else {
            parser.script += c
          }
          continue

        case S.SCRIPT_ENDING:
          if (c === '/') {
            parser.state = S.CLOSE_TAG
          } else {
            parser.script += '<' + c
            parser.state = S.SCRIPT
          }
          continue

        case S.OPEN_WAKA:
          // either a /, ?, !, or text is coming next.
          if (c === '!') {
            parser.state = S.SGML_DECL
            parser.sgmlDecl = ''
          } else if (isWhitespace(c)) {
            // wait for it...
          } else if (isMatch(nameStart, c)) {
            parser.state = S.OPEN_TAG
            parser.tagName = c
          } else if (c === '/') {
            parser.state = S.CLOSE_TAG
            parser.tagName = ''
          } else if (c === '?') {
            parser.state = S.PROC_INST
            parser.procInstName = parser.procInstBody = ''
          } else {
            strictFail(parser, 'Unencoded <')
            // if there was some whitespace, then add that in.
            if (parser.startTagPosition + 1 < parser.position) {
              var pad = parser.position - parser.startTagPosition
              c = new Array(pad).join(' ') + c
            }
            parser.textNode += '<' + c
            parser.state = S.TEXT
          }
          continue

        case S.SGML_DECL:
          if ((parser.sgmlDecl + c).toUpperCase() === CDATA) {
            emitNode(parser, 'onopencdata')
            parser.state = S.CDATA
            parser.sgmlDecl = ''
            parser.cdata = ''
          } else if (parser.sgmlDecl + c === '--') {
            parser.state = S.COMMENT
            parser.comment = ''
            parser.sgmlDecl = ''
          } else if ((parser.sgmlDecl + c).toUpperCase() === DOCTYPE) {
            parser.state = S.DOCTYPE
            if (parser.doctype || parser.sawRoot) {
              strictFail(parser,
                'Inappropriately located doctype declaration')
            }
            parser.doctype = ''
            parser.sgmlDecl = ''
          } else if (c === '>') {
            emitNode(parser, 'onsgmldeclaration', parser.sgmlDecl)
            parser.sgmlDecl = ''
            parser.state = S.TEXT
          } else if (isQuote(c)) {
            parser.state = S.SGML_DECL_QUOTED
            parser.sgmlDecl += c
          } else {
            parser.sgmlDecl += c
          }
          continue

        case S.SGML_DECL_QUOTED:
          if (c === parser.q) {
            parser.state = S.SGML_DECL
            parser.q = ''
          }
          parser.sgmlDecl += c
          continue

        case S.DOCTYPE:
          if (c === '>') {
            parser.state = S.TEXT
            emitNode(parser, 'ondoctype', parser.doctype)
            parser.doctype = true // just remember that we saw it.
          } else {
            parser.doctype += c
            if (c === '[') {
              parser.state = S.DOCTYPE_DTD
            } else if (isQuote(c)) {
              parser.state = S.DOCTYPE_QUOTED
              parser.q = c
            }
          }
          continue

        case S.DOCTYPE_QUOTED:
          parser.doctype += c
          if (c === parser.q) {
            parser.q = ''
            parser.state = S.DOCTYPE
          }
          continue

        case S.DOCTYPE_DTD:
          parser.doctype += c
          if (c === ']') {
            parser.state = S.DOCTYPE
          } else if (isQuote(c)) {
            parser.state = S.DOCTYPE_DTD_QUOTED
            parser.q = c
          }
          continue

        case S.DOCTYPE_DTD_QUOTED:
          parser.doctype += c
          if (c === parser.q) {
            parser.state = S.DOCTYPE_DTD
            parser.q = ''
          }
          continue

        case S.COMMENT:
          if (c === '-') {
            parser.state = S.COMMENT_ENDING
          } else {
            parser.comment += c
          }
          continue

        case S.COMMENT_ENDING:
          if (c === '-') {
            parser.state = S.COMMENT_ENDED
            parser.comment = textopts(parser.opt, parser.comment)
            if (parser.comment) {
              emitNode(parser, 'oncomment', parser.comment)
            }
            parser.comment = ''
          } else {
            parser.comment += '-' + c
            parser.state = S.COMMENT
          }
          continue

        case S.COMMENT_ENDED:
          if (c !== '>') {
            strictFail(parser, 'Malformed comment')
            // allow <!-- blah -- bloo --> in non-strict mode,
            // which is a comment of " blah -- bloo "
            parser.comment += '--' + c
            parser.state = S.COMMENT
          } else {
            parser.state = S.TEXT
          }
          continue

        case S.CDATA:
          if (c === ']') {
            parser.state = S.CDATA_ENDING
          } else {
            parser.cdata += c
          }
          continue

        case S.CDATA_ENDING:
          if (c === ']') {
            parser.state = S.CDATA_ENDING_2
          } else {
            parser.cdata += ']' + c
            parser.state = S.CDATA
          }
          continue

        case S.CDATA_ENDING_2:
          if (c === '>') {
            if (parser.cdata) {
              emitNode(parser, 'oncdata', parser.cdata)
            }
            emitNode(parser, 'onclosecdata')
            parser.cdata = ''
            parser.state = S.TEXT
          } else if (c === ']') {
            parser.cdata += ']'
          } else {
            parser.cdata += ']]' + c
            parser.state = S.CDATA
          }
          continue

        case S.PROC_INST:
          if (c === '?') {
            parser.state = S.PROC_INST_ENDING
          } else if (isWhitespace(c)) {
            parser.state = S.PROC_INST_BODY
          } else {
            parser.procInstName += c
          }
          continue

        case S.PROC_INST_BODY:
          if (!parser.procInstBody && isWhitespace(c)) {
            continue
          } else if (c === '?') {
            parser.state = S.PROC_INST_ENDING
          } else {
            parser.procInstBody += c
          }
          continue

        case S.PROC_INST_ENDING:
          if (c === '>') {
            emitNode(parser, 'onprocessinginstruction', {
              name: parser.procInstName,
              body: parser.procInstBody
            })
            parser.procInstName = parser.procInstBody = ''
            parser.state = S.TEXT
          } else {
            parser.procInstBody += '?' + c
            parser.state = S.PROC_INST_BODY
          }
          continue

        case S.OPEN_TAG:
          if (isMatch(nameBody, c)) {
            parser.tagName += c
          } else {
            newTag(parser)
            if (c === '>') {
              openTag(parser)
            } else if (c === '/') {
              parser.state = S.OPEN_TAG_SLASH
            } else {
              if (!isWhitespace(c)) {
                strictFail(parser, 'Invalid character in tag name')
              }
              parser.state = S.ATTRIB
            }
          }
          continue

        case S.OPEN_TAG_SLASH:
          if (c === '>') {
            openTag(parser, true)
            closeTag(parser)
          } else {
            strictFail(parser, 'Forward-slash in opening tag not followed by >')
            parser.state = S.ATTRIB
          }
          continue

        case S.ATTRIB:
          // haven't read the attribute name yet.
          if (isWhitespace(c)) {
            continue
          } else if (c === '>') {
            openTag(parser)
          } else if (c === '/') {
            parser.state = S.OPEN_TAG_SLASH
          } else if (isMatch(nameStart, c)) {
            parser.attribName = c
            parser.attribValue = ''
            parser.state = S.ATTRIB_NAME
          } else {
            strictFail(parser, 'Invalid attribute name')
          }
          continue

        case S.ATTRIB_NAME:
          if (c === '=') {
            parser.state = S.ATTRIB_VALUE
          } else if (c === '>') {
            strictFail(parser, 'Attribute without value')
            parser.attribValue = parser.attribName
            attrib(parser)
            openTag(parser)
          } else if (isWhitespace(c)) {
            parser.state = S.ATTRIB_NAME_SAW_WHITE
          } else if (isMatch(nameBody, c)) {
            parser.attribName += c
          } else {
            strictFail(parser, 'Invalid attribute name')
          }
          continue

        case S.ATTRIB_NAME_SAW_WHITE:
          if (c === '=') {
            parser.state = S.ATTRIB_VALUE
          } else if (isWhitespace(c)) {
            continue
          } else {
            strictFail(parser, 'Attribute without value')
            parser.tag.attributes[parser.attribName] = ''
            parser.attribValue = ''
            emitNode(parser, 'onattribute', {
              name: parser.attribName,
              value: ''
            })
            parser.attribName = ''
            if (c === '>') {
              openTag(parser)
            } else if (isMatch(nameStart, c)) {
              parser.attribName = c
              parser.state = S.ATTRIB_NAME
            } else {
              strictFail(parser, 'Invalid attribute name')
              parser.state = S.ATTRIB
            }
          }
          continue

        case S.ATTRIB_VALUE:
          if (isWhitespace(c)) {
            continue
          } else if (isQuote(c)) {
            parser.q = c
            parser.state = S.ATTRIB_VALUE_QUOTED
          } else {
            strictFail(parser, 'Unquoted attribute value')
            parser.state = S.ATTRIB_VALUE_UNQUOTED
            parser.attribValue = c
          }
          continue

        case S.ATTRIB_VALUE_QUOTED:
          if (c !== parser.q) {
            if (c === '&') {
              parser.state = S.ATTRIB_VALUE_ENTITY_Q
            } else {
              parser.attribValue += c
            }
            continue
          }
          attrib(parser)
          parser.q = ''
          parser.state = S.ATTRIB_VALUE_CLOSED
          continue

        case S.ATTRIB_VALUE_CLOSED:
          if (isWhitespace(c)) {
            parser.state = S.ATTRIB
          } else if (c === '>') {
            openTag(parser)
          } else if (c === '/') {
            parser.state = S.OPEN_TAG_SLASH
          } else if (isMatch(nameStart, c)) {
            strictFail(parser, 'No whitespace between attributes')
            parser.attribName = c
            parser.attribValue = ''
            parser.state = S.ATTRIB_NAME
          } else {
            strictFail(parser, 'Invalid attribute name')
          }
          continue

        case S.ATTRIB_VALUE_UNQUOTED:
          if (!isAttribEnd(c)) {
            if (c === '&') {
              parser.state = S.ATTRIB_VALUE_ENTITY_U
            } else {
              parser.attribValue += c
            }
            continue
          }
          attrib(parser)
          if (c === '>') {
            openTag(parser)
          } else {
            parser.state = S.ATTRIB
          }
          continue

        case S.CLOSE_TAG:
          if (!parser.tagName) {
            if (isWhitespace(c)) {
              continue
            } else if (notMatch(nameStart, c)) {
              if (parser.script) {
                parser.script += '</' + c
                parser.state = S.SCRIPT
              } else {
                strictFail(parser, 'Invalid tagname in closing tag.')
              }
            } else {
              parser.tagName = c
            }
          } else if (c === '>') {
            closeTag(parser)
          } else if (isMatch(nameBody, c)) {
            parser.tagName += c
          } else if (parser.script) {
            parser.script += '</' + parser.tagName
            parser.tagName = ''
            parser.state = S.SCRIPT
          } else {
            if (!isWhitespace(c)) {
              strictFail(parser, 'Invalid tagname in closing tag')
            }
            parser.state = S.CLOSE_TAG_SAW_WHITE
          }
          continue

        case S.CLOSE_TAG_SAW_WHITE:
          if (isWhitespace(c)) {
            continue
          }
          if (c === '>') {
            closeTag(parser)
          } else {
            strictFail(parser, 'Invalid characters in closing tag')
          }
          continue

        case S.TEXT_ENTITY:
        case S.ATTRIB_VALUE_ENTITY_Q:
        case S.ATTRIB_VALUE_ENTITY_U:
          var returnState
          var buffer
          switch (parser.state) {
            case S.TEXT_ENTITY:
              returnState = S.TEXT
              buffer = 'textNode'
              break

            case S.ATTRIB_VALUE_ENTITY_Q:
              returnState = S.ATTRIB_VALUE_QUOTED
              buffer = 'attribValue'
              break

            case S.ATTRIB_VALUE_ENTITY_U:
              returnState = S.ATTRIB_VALUE_UNQUOTED
              buffer = 'attribValue'
              break
          }

          if (c === ';') {
            parser[buffer] += parseEntity(parser)
            parser.entity = ''
            parser.state = returnState
          } else if (isMatch(parser.entity.length ? entityBody : entityStart, c)) {
            parser.entity += c
          } else {
            strictFail(parser, 'Invalid character in entity name')
            parser[buffer] += '&' + parser.entity + c
            parser.entity = ''
            parser.state = returnState
          }

          continue

        default:
          throw new Error(parser, 'Unknown state: ' + parser.state)
      }
    } // while

    if (parser.position >= parser.bufferCheckPosition) {
      checkBufferLength(parser)
    }
    return parser
  }

  /*! http://mths.be/fromcodepoint v0.1.0 by @mathias */
  /* istanbul ignore next */
  if (!String.fromCodePoint) {
    (function () {
      var stringFromCharCode = String.fromCharCode
      var floor = Math.floor
      var fromCodePoint = function () {
        var MAX_SIZE = 0x4000
        var codeUnits = []
        var highSurrogate
        var lowSurrogate
        var index = -1
        var length = arguments.length
        if (!length) {
          return ''
        }
        var result = ''
        while (++index < length) {
          var codePoint = Number(arguments[index])
          if (
            !isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity`
            codePoint < 0 || // not a valid Unicode code point
            codePoint > 0x10FFFF || // not a valid Unicode code point
            floor(codePoint) !== codePoint // not an integer
          ) {
            throw RangeError('Invalid code point: ' + codePoint)
          }
          if (codePoint <= 0xFFFF) { // BMP code point
            codeUnits.push(codePoint)
          } else { // Astral code point; split in surrogate halves
            // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
            codePoint -= 0x10000
            highSurrogate = (codePoint >> 10) + 0xD800
            lowSurrogate = (codePoint % 0x400) + 0xDC00
            codeUnits.push(highSurrogate, lowSurrogate)
          }
          if (index + 1 === length || codeUnits.length > MAX_SIZE) {
            result += stringFromCharCode.apply(null, codeUnits)
            codeUnits.length = 0
          }
        }
        return result
      }
      /* istanbul ignore next */
      if (Object.defineProperty) {
        Object.defineProperty(String, 'fromCodePoint', {
          value: fromCodePoint,
          configurable: true,
          writable: true
        })
      } else {
        String.fromCodePoint = fromCodePoint
      }
    }())
  }
})(typeof exports === 'undefined' ? this.sax = {} : exports)

}).call(this)}).call(this,reqqq("buffer").Buffer)
},{"buffer":4,"stream":28,"string_decoder":62}],28:[function(reqqq,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

module.exports = Stream;

var EE = reqqq('events').EventEmitter;
var inherits = reqqq('inherits');

inherits(Stream, EE);
Stream.Readable = reqqq('readable-stream/lib/_stream_readable.js');
Stream.Writable = reqqq('readable-stream/lib/_stream_writable.js');
Stream.Duplex = reqqq('readable-stream/lib/_stream_duplex.js');
Stream.Transform = reqqq('readable-stream/lib/_stream_transform.js');
Stream.PassThrough = reqqq('readable-stream/lib/_stream_passthrough.js');
Stream.finished = reqqq('readable-stream/lib/internal/streams/end-of-stream.js')
Stream.pipeline = reqqq('readable-stream/lib/internal/streams/pipeline.js')

// Backwards-compat with node 0.4.x
Stream.Stream = Stream;



// old-style streams.  Note that the pipe method (the only relevant
// part of this class) is overridden in the Readable class.

function Stream() {
  EE.call(this);
}

Stream.prototype.pipe = function(dest, options) {
  var source = this;

  function ondata(chunk) {
    if (dest.writable) {
      if (false === dest.write(chunk) && source.pause) {
        source.pause();
      }
    }
  }

  source.on('data', ondata);

  function ondrain() {
    if (source.readable && source.resume) {
      source.resume();
    }
  }

  dest.on('drain', ondrain);

  // If the 'end' option is not supplied, dest.end() will be called when
  // source gets the 'end' or 'close' events.  Only dest.end() once.
  if (!dest._isStdio && (!options || options.end !== false)) {
    source.on('end', onend);
    source.on('close', onclose);
  }

  var didOnEnd = false;
  function onend() {
    if (didOnEnd) return;
    didOnEnd = true;

    dest.end();
  }


  function onclose() {
    if (didOnEnd) return;
    didOnEnd = true;

    if (typeof dest.destroy === 'function') dest.destroy();
  }

  // don't leave dangling pipes when there are errors.
  function onerror(er) {
    cleanup();
    if (EE.listenerCount(this, 'error') === 0) {
      throw er; // Unhandled stream error in pipe.
    }
  }

  source.on('error', onerror);
  dest.on('error', onerror);

  // remove all the event listeners that were added.
  function cleanup() {
    source.removeListener('data', ondata);
    dest.removeListener('drain', ondrain);

    source.removeListener('end', onend);
    source.removeListener('close', onclose);

    source.removeListener('error', onerror);
    dest.removeListener('error', onerror);

    source.removeListener('end', cleanup);
    source.removeListener('close', cleanup);

    dest.removeListener('close', cleanup);
  }

  source.on('end', cleanup);
  source.on('close', cleanup);

  dest.on('close', cleanup);

  dest.emit('pipe', source);

  // Allow for unix-like usage: A.pipe(B).pipe(C)
  return dest;
};

},{"events":6,"inherits":10,"readable-stream/lib/_stream_duplex.js":30,"readable-stream/lib/_stream_passthrough.js":31,"readable-stream/lib/_stream_readable.js":32,"readable-stream/lib/_stream_transform.js":33,"readable-stream/lib/_stream_writable.js":34,"readable-stream/lib/internal/streams/end-of-stream.js":38,"readable-stream/lib/internal/streams/pipeline.js":40}],29:[function(reqqq,module,exports){
'use strict';

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

var codes = {};

function createErrorType(code, message, Base) {
  if (!Base) {
    Base = Error;
  }

  function getMessage(arg1, arg2, arg3) {
    if (typeof message === 'string') {
      return message;
    } else {
      return message(arg1, arg2, arg3);
    }
  }

  var NodeError =
  /*#__PURE__*/
  function (_Base) {
    _inheritsLoose(NodeError, _Base);

    function NodeError(arg1, arg2, arg3) {
      return _Base.call(this, getMessage(arg1, arg2, arg3)) || this;
    }

    return NodeError;
  }(Base);

  NodeError.prototype.name = Base.name;
  NodeError.prototype.code = code;
  codes[code] = NodeError;
} // https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js


function oneOf(expected, thing) {
  if (Array.isArray(expected)) {
    var len = expected.length;
    expected = expected.map(function (i) {
      return String(i);
    });

    if (len > 2) {
      return "one of ".concat(thing, " ").concat(expected.slice(0, len - 1).join(', '), ", or ") + expected[len - 1];
    } else if (len === 2) {
      return "one of ".concat(thing, " ").concat(expected[0], " or ").concat(expected[1]);
    } else {
      return "of ".concat(thing, " ").concat(expected[0]);
    }
  } else {
    return "of ".concat(thing, " ").concat(String(expected));
  }
} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith


function startsWith(str, search, pos) {
  return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith


function endsWith(str, search, this_len) {
  if (this_len === undefined || this_len > str.length) {
    this_len = str.length;
  }

  return str.substring(this_len - search.length, this_len) === search;
} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes


function includes(str, search, start) {
  if (typeof start !== 'number') {
    start = 0;
  }

  if (start + search.length > str.length) {
    return false;
  } else {
    return str.indexOf(search, start) !== -1;
  }
}

createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
  return 'The value "' + value + '" is invalid for option "' + name + '"';
}, TypeError);
createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
  // determiner: 'must be' or 'must not be'
  var determiner;

  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
    determiner = 'must not be';
    expected = expected.replace(/^not /, '');
  } else {
    determiner = 'must be';
  }

  var msg;

  if (endsWith(name, ' argument')) {
    // For cases like 'first argument'
    msg = "The ".concat(name, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
  } else {
    var type = includes(name, '.') ? 'property' : 'argument';
    msg = "The \"".concat(name, "\" ").concat(type, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
  }

  msg += ". Received type ".concat(typeof actual);
  return msg;
}, TypeError);
createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
  return 'The ' + name + ' method is not implemented';
});
createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
createErrorType('ERR_STREAM_DESTROYED', function (name) {
  return 'Cannot call ' + name + ' after a stream was destroyed';
});
createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
  return 'Unknown encoding: ' + arg;
}, TypeError);
createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
module.exports.codes = codes;

},{}],30:[function(reqqq,module,exports){
(function (process){(function (){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a duplex stream is just a stream that is both readable and writable.
// Since JS doesn't have multiple prototypal inheritance, this class
// prototypally inherits from Readable, and then parasitically from
// Writable.
'use strict';
/*<replacement>*/

var objectKeys = Object.keys || function (obj) {
  var keys = [];

  for (var key in obj) {
    keys.push(key);
  }

  return keys;
};
/*</replacement>*/


module.exports = Duplex;

var Readable = reqqq('./_stream_readable');

var Writable = reqqq('./_stream_writable');

reqqq('inherits')(Duplex, Readable);

{
  // Allow the keys array to be GC'ed.
  var keys = objectKeys(Writable.prototype);

  for (var v = 0; v < keys.length; v++) {
    var method = keys[v];
    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
  }
}

function Duplex(options) {
  if (!(this instanceof Duplex)) return new Duplex(options);
  Readable.call(this, options);
  Writable.call(this, options);
  this.allowHalfOpen = true;

  if (options) {
    if (options.readable === false) this.readable = false;
    if (options.writable === false) this.writable = false;

    if (options.allowHalfOpen === false) {
      this.allowHalfOpen = false;
      this.once('end', onend);
    }
  }
}

Object.defineProperty(Duplex.prototype, 'writableHighWaterMark', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._writableState.highWaterMark;
  }
});
Object.defineProperty(Duplex.prototype, 'writableBuffer', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._writableState && this._writableState.getBuffer();
  }
});
Object.defineProperty(Duplex.prototype, 'writableLength', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._writableState.length;
  }
}); // the no-half-open enforcer

function onend() {
  // If the writable side ended, then we're ok.
  if (this._writableState.ended) return; // no more data can be written.
  // But allow more writes to happen in this tick.

  process.nextTick(onEndNT, this);
}

function onEndNT(self) {
  self.end();
}

Object.defineProperty(Duplex.prototype, 'destroyed', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    if (this._readableState === undefined || this._writableState === undefined) {
      return false;
    }

    return this._readableState.destroyed && this._writableState.destroyed;
  },
  set: function set(value) {
    // we ignore the value if the stream
    // has not been initialized yet
    if (this._readableState === undefined || this._writableState === undefined) {
      return;
    } // backward compatibility, the user is explicitly
    // managing destroyed


    this._readableState.destroyed = value;
    this._writableState.destroyed = value;
  }
});
}).call(this)}).call(this,reqqq('_process'))
},{"./_stream_readable":32,"./_stream_writable":34,"_process":20,"inherits":10}],31:[function(reqqq,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a passthrough stream.
// basically just the most minimal sort of Transform stream.
// Every written chunk gets output as-is.
'use strict';

module.exports = PassThrough;

var Transform = reqqq('./_stream_transform');

reqqq('inherits')(PassThrough, Transform);

function PassThrough(options) {
  if (!(this instanceof PassThrough)) return new PassThrough(options);
  Transform.call(this, options);
}

PassThrough.prototype._transform = function (chunk, encoding, cb) {
  cb(null, chunk);
};
},{"./_stream_transform":33,"inherits":10}],32:[function(reqqq,module,exports){
(function (process,global){(function (){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';

module.exports = Readable;
/*<replacement>*/

var Duplex;
/*</replacement>*/

Readable.ReadableState = ReadableState;
/*<replacement>*/

var EE = reqqq('events').EventEmitter;

var EElistenerCount = function EElistenerCount(emitter, type) {
  return emitter.listeners(type).length;
};
/*</replacement>*/

/*<replacement>*/


var Stream = reqqq('./internal/streams/stream');
/*</replacement>*/


var Buffer = reqqq('buffer').Buffer;

var OurUint8Array = global.Uint8Array || function () {};

function _uint8ArrayToBuffer(chunk) {
  return Buffer.from(chunk);
}

function _isUint8Array(obj) {
  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}
/*<replacement>*/


var debugUtil = reqqq('util');

var debug;

if (debugUtil && debugUtil.debuglog) {
  debug = debugUtil.debuglog('stream');
} else {
  debug = function debug() {};
}
/*</replacement>*/


var BufferList = reqqq('./internal/streams/buffer_list');

var destroyImpl = reqqq('./internal/streams/destroy');

var _reqqq = reqqq('./internal/streams/state'),
    getHighWaterMark = _reqqq.getHighWaterMark;

var _reqqq$codes = reqqq('../errors').codes,
    ERR_INVALID_ARG_TYPE = _reqqq$codes.ERR_INVALID_ARG_TYPE,
    ERR_STREAM_PUSH_AFTER_EOF = _reqqq$codes.ERR_STREAM_PUSH_AFTER_EOF,
    ERR_METHOD_NOT_IMPLEMENTED = _reqqq$codes.ERR_METHOD_NOT_IMPLEMENTED,
    ERR_STREAM_UNSHIFT_AFTER_END_EVENT = _reqqq$codes.ERR_STREAM_UNSHIFT_AFTER_END_EVENT; // Lazy loaded to improve the startup performance.


var StringDecoder;
var createReadableStreamAsyncIterator;
var from;

reqqq('inherits')(Readable, Stream);

var errorOrDestroy = destroyImpl.errorOrDestroy;
var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];

function prependListener(emitter, event, fn) {
  // Sadly this is not cacheable as some libraries bundle their own
  // event emitter implementation with them.
  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn); // This is a hack to make sure that our error handler is attached before any
  // userland ones.  NEVER DO THIS. This is here only because this code needs
  // to continue to work with older versions of Node.js that do not include
  // the prependListener() method. The goal is to eventually remove this hack.

  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (Array.isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
}

function ReadableState(options, stream, isDuplex) {
  Duplex = Duplex || reqqq('./_stream_duplex');
  options = options || {}; // Duplex streams are both readable and writable, but share
  // the same options object.
  // However, some cases reqqq setting options to different
  // values for the readable and the writable sides of the duplex stream.
  // These options can be provided separately as readableXXX and writableXXX.

  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag. Used to make read(n) ignore n and to
  // make all the buffer merging and length checks go away

  this.objectMode = !!options.objectMode;
  if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode; // the point at which it stops calling _read() to fill the buffer
  // Note: 0 is a valid value, means "don't call _read preemptively ever"

  this.highWaterMark = getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex); // A linked list is used to store data chunks instead of an array because the
  // linked list can remove elements from the beginning faster than
  // array.shift()

  this.buffer = new BufferList();
  this.length = 0;
  this.pipes = null;
  this.pipesCount = 0;
  this.flowing = null;
  this.ended = false;
  this.endEmitted = false;
  this.reading = false; // a flag to be able to tell if the event 'readable'/'data' is emitted
  // immediately, or on a later tick.  We set this to true at first, because
  // any actions that shouldn't happen until "later" should generally also
  // not happen before the first read call.

  this.sync = true; // whenever we return null, then we set a flag to say
  // that we're awaiting a 'readable' event emission.

  this.needReadable = false;
  this.emittedReadable = false;
  this.readableListening = false;
  this.resumeScheduled = false;
  this.paused = true; // Should close be emitted on destroy. Defaults to true.

  this.emitClose = options.emitClose !== false; // Should .destroy() be called after 'end' (and potentially 'finish')

  this.autoDestroy = !!options.autoDestroy; // has it been destroyed

  this.destroyed = false; // Crypto is kind of old and crusty.  Historically, its default string
  // encoding is 'binary' so we have to make this configurable.
  // Everything else in the universe uses 'utf8', though.

  this.defaultEncoding = options.defaultEncoding || 'utf8'; // the number of writers that are awaiting a drain event in .pipe()s

  this.awaitDrain = 0; // if true, a maybeReadMore has been scheduled

  this.readingMore = false;
  this.decoder = null;
  this.encoding = null;

  if (options.encoding) {
    if (!StringDecoder) StringDecoder = reqqq('string_decoder/').StringDecoder;
    this.decoder = new StringDecoder(options.encoding);
    this.encoding = options.encoding;
  }
}

function Readable(options) {
  Duplex = Duplex || reqqq('./_stream_duplex');
  if (!(this instanceof Readable)) return new Readable(options); // Checking for a Stream.Duplex instance is faster here instead of inside
  // the ReadableState constructor, at least with V8 6.5

  var isDuplex = this instanceof Duplex;
  this._readableState = new ReadableState(options, this, isDuplex); // legacy

  this.readable = true;

  if (options) {
    if (typeof options.read === 'function') this._read = options.read;
    if (typeof options.destroy === 'function') this._destroy = options.destroy;
  }

  Stream.call(this);
}

Object.defineProperty(Readable.prototype, 'destroyed', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    if (this._readableState === undefined) {
      return false;
    }

    return this._readableState.destroyed;
  },
  set: function set(value) {
    // we ignore the value if the stream
    // has not been initialized yet
    if (!this._readableState) {
      return;
    } // backward compatibility, the user is explicitly
    // managing destroyed


    this._readableState.destroyed = value;
  }
});
Readable.prototype.destroy = destroyImpl.destroy;
Readable.prototype._undestroy = destroyImpl.undestroy;

Readable.prototype._destroy = function (err, cb) {
  cb(err);
}; // Manually shove something into the read() buffer.
// This returns true if the highWaterMark has not been hit yet,
// similar to how Writable.write() returns true if you should
// write() some more.


Readable.prototype.push = function (chunk, encoding) {
  var state = this._readableState;
  var skipChunkCheck;

  if (!state.objectMode) {
    if (typeof chunk === 'string') {
      encoding = encoding || state.defaultEncoding;

      if (encoding !== state.encoding) {
        chunk = Buffer.from(chunk, encoding);
        encoding = '';
      }

      skipChunkCheck = true;
    }
  } else {
    skipChunkCheck = true;
  }

  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
}; // Unshift should *always* be something directly out of read()


Readable.prototype.unshift = function (chunk) {
  return readableAddChunk(this, chunk, null, true, false);
};

function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
  debug('readableAddChunk', chunk);
  var state = stream._readableState;

  if (chunk === null) {
    state.reading = false;
    onEofChunk(stream, state);
  } else {
    var er;
    if (!skipChunkCheck) er = chunkInvalid(state, chunk);

    if (er) {
      errorOrDestroy(stream, er);
    } else if (state.objectMode || chunk && chunk.length > 0) {
      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {
        chunk = _uint8ArrayToBuffer(chunk);
      }

      if (addToFront) {
        if (state.endEmitted) errorOrDestroy(stream, new ERR_STREAM_UNSHIFT_AFTER_END_EVENT());else addChunk(stream, state, chunk, true);
      } else if (state.ended) {
        errorOrDestroy(stream, new ERR_STREAM_PUSH_AFTER_EOF());
      } else if (state.destroyed) {
        return false;
      } else {
        state.reading = false;

        if (state.decoder && !encoding) {
          chunk = state.decoder.write(chunk);
          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);
        } else {
          addChunk(stream, state, chunk, false);
        }
      }
    } else if (!addToFront) {
      state.reading = false;
      maybeReadMore(stream, state);
    }
  } // We can push more data if we are below the highWaterMark.
  // Also, if we have no data yet, we can stand some more bytes.
  // This is to work around cases where hwm=0, such as the repl.


  return !state.ended && (state.length < state.highWaterMark || state.length === 0);
}

function addChunk(stream, state, chunk, addToFront) {
  if (state.flowing && state.length === 0 && !state.sync) {
    state.awaitDrain = 0;
    stream.emit('data', chunk);
  } else {
    // update the buffer info.
    state.length += state.objectMode ? 1 : chunk.length;
    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);
    if (state.needReadable) emitReadable(stream);
  }

  maybeReadMore(stream, state);
}

function chunkInvalid(state, chunk) {
  var er;

  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk);
  }

  return er;
}

Readable.prototype.isPaused = function () {
  return this._readableState.flowing === false;
}; // backwards compatibility.


Readable.prototype.setEncoding = function (enc) {
  if (!StringDecoder) StringDecoder = reqqq('string_decoder/').StringDecoder;
  var decoder = new StringDecoder(enc);
  this._readableState.decoder = decoder; // If setEncoding(null), decoder.encoding equals utf8

  this._readableState.encoding = this._readableState.decoder.encoding; // Iterate over current buffer to convert already stored Buffers:

  var p = this._readableState.buffer.head;
  var content = '';

  while (p !== null) {
    content += decoder.write(p.data);
    p = p.next;
  }

  this._readableState.buffer.clear();

  if (content !== '') this._readableState.buffer.push(content);
  this._readableState.length = content.length;
  return this;
}; // Don't raise the hwm > 1GB


var MAX_HWM = 0x40000000;

function computeNewHighWaterMark(n) {
  if (n >= MAX_HWM) {
    // TODO(ronag): Throw ERR_VALUE_OUT_OF_RANGE.
    n = MAX_HWM;
  } else {
    // Get the next highest power of 2 to prevent increasing hwm excessively in
    // tiny amounts
    n--;
    n |= n >>> 1;
    n |= n >>> 2;
    n |= n >>> 4;
    n |= n >>> 8;
    n |= n >>> 16;
    n++;
  }

  return n;
} // This function is designed to be inlinable, so please take care when making
// changes to the function body.


function howMuchToRead(n, state) {
  if (n <= 0 || state.length === 0 && state.ended) return 0;
  if (state.objectMode) return 1;

  if (n !== n) {
    // Only flow one buffer at a time
    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
  } // If we're asking for more than the current hwm, then raise the hwm.


  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
  if (n <= state.length) return n; // Don't have enough

  if (!state.ended) {
    state.needReadable = true;
    return 0;
  }

  return state.length;
} // you can override either this method, or the async _read(n) below.


Readable.prototype.read = function (n) {
  debug('read', n);
  n = parseInt(n, 10);
  var state = this._readableState;
  var nOrig = n;
  if (n !== 0) state.emittedReadable = false; // if we're doing read(0) to trigger a readable event, but we
  // already have a bunch of data in the buffer, then just trigger
  // the 'readable' event and move on.

  if (n === 0 && state.needReadable && ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)) {
    debug('read: emitReadable', state.length, state.ended);
    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
    return null;
  }

  n = howMuchToRead(n, state); // if we've ended, and we're now clear, then finish it up.

  if (n === 0 && state.ended) {
    if (state.length === 0) endReadable(this);
    return null;
  } // All the actual chunk generation logic needs to be
  // *below* the call to _read.  The reason is that in certain
  // synthetic stream cases, such as passthrough streams, _read
  // may be a completely synchronous operation which may change
  // the state of the read buffer, providing enough data when
  // before there was *not* enough.
  //
  // So, the steps are:
  // 1. Figure out what the state of things will be after we do
  // a read from the buffer.
  //
  // 2. If that resulting state will trigger a _read, then call _read.
  // Note that this may be asynchronous, or synchronous.  Yes, it is
  // deeply ugly to write APIs this way, but that still doesn't mean
  // that the Readable class should behave improperly, as streams are
  // designed to be sync/async agnostic.
  // Take note if the _read call is sync or async (ie, if the read call
  // has returned yet), so that we know whether or not it's safe to emit
  // 'readable' etc.
  //
  // 3. Actually pull the requested chunks out of the buffer and return.
  // if we need a readable event, then we need to do some reading.


  var doRead = state.needReadable;
  debug('need readable', doRead); // if we currently have less than the highWaterMark, then also read some

  if (state.length === 0 || state.length - n < state.highWaterMark) {
    doRead = true;
    debug('length less than watermark', doRead);
  } // however, if we've ended, then there's no point, and if we're already
  // reading, then it's unnecessary.


  if (state.ended || state.reading) {
    doRead = false;
    debug('reading or ended', doRead);
  } else if (doRead) {
    debug('do read');
    state.reading = true;
    state.sync = true; // if the length is currently zero, then we *need* a readable event.

    if (state.length === 0) state.needReadable = true; // call internal read method

    this._read(state.highWaterMark);

    state.sync = false; // If _read pushed data synchronously, then `reading` will be false,
    // and we need to re-evaluate how much data we can return to the user.

    if (!state.reading) n = howMuchToRead(nOrig, state);
  }

  var ret;
  if (n > 0) ret = fromList(n, state);else ret = null;

  if (ret === null) {
    state.needReadable = state.length <= state.highWaterMark;
    n = 0;
  } else {
    state.length -= n;
    state.awaitDrain = 0;
  }

  if (state.length === 0) {
    // If we have nothing in the buffer, then we want to know
    // as soon as we *do* get something into the buffer.
    if (!state.ended) state.needReadable = true; // If we tried to read() past the EOF, then emit end on the next tick.

    if (nOrig !== n && state.ended) endReadable(this);
  }

  if (ret !== null) this.emit('data', ret);
  return ret;
};

function onEofChunk(stream, state) {
  debug('onEofChunk');
  if (state.ended) return;

  if (state.decoder) {
    var chunk = state.decoder.end();

    if (chunk && chunk.length) {
      state.buffer.push(chunk);
      state.length += state.objectMode ? 1 : chunk.length;
    }
  }

  state.ended = true;

  if (state.sync) {
    // if we are sync, wait until next tick to emit the data.
    // Otherwise we risk emitting data in the flow()
    // the readable code triggers during a read() call
    emitReadable(stream);
  } else {
    // emit 'readable' now to make sure it gets picked up.
    state.needReadable = false;

    if (!state.emittedReadable) {
      state.emittedReadable = true;
      emitReadable_(stream);
    }
  }
} // Don't emit readable right away in sync mode, because this can trigger
// another read() call => stack overflow.  This way, it might trigger
// a nextTick recursion warning, but that's not so bad.


function emitReadable(stream) {
  var state = stream._readableState;
  debug('emitReadable', state.needReadable, state.emittedReadable);
  state.needReadable = false;

  if (!state.emittedReadable) {
    debug('emitReadable', state.flowing);
    state.emittedReadable = true;
    process.nextTick(emitReadable_, stream);
  }
}

function emitReadable_(stream) {
  var state = stream._readableState;
  debug('emitReadable_', state.destroyed, state.length, state.ended);

  if (!state.destroyed && (state.length || state.ended)) {
    stream.emit('readable');
    state.emittedReadable = false;
  } // The stream needs another readable event if
  // 1. It is not flowing, as the flow mechanism will take
  //    care of it.
  // 2. It is not ended.
  // 3. It is below the highWaterMark, so we can schedule
  //    another readable later.


  state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark;
  flow(stream);
} // at this point, the user has presumably seen the 'readable' event,
// and called read() to consume some data.  that may have triggered
// in turn another _read(n) call, in which case reading = true if
// it's in progress.
// However, if we're not ended, or reading, and the length < hwm,
// then go ahead and try to read some more preemptively.


function maybeReadMore(stream, state) {
  if (!state.readingMore) {
    state.readingMore = true;
    process.nextTick(maybeReadMore_, stream, state);
  }
}

function maybeReadMore_(stream, state) {
  // Attempt to read more data if we should.
  //
  // The conditions for reading more data are (one of):
  // - Not enough data buffered (state.length < state.highWaterMark). The loop
  //   is responsible for filling the buffer with enough data if such data
  //   is available. If highWaterMark is 0 and we are not in the flowing mode
  //   we should _not_ attempt to buffer any extra data. We'll get more data
  //   when the stream consumer calls read() instead.
  // - No data in the buffer, and the stream is in flowing mode. In this mode
  //   the loop below is responsible for ensuring read() is called. Failing to
  //   call read here would abort the flow and there's no other mechanism for
  //   continuing the flow if the stream consumer has just subscribed to the
  //   'data' event.
  //
  // In addition to the above conditions to keep reading data, the following
  // conditions prevent the data from being read:
  // - The stream has ended (state.ended).
  // - There is already a pending 'read' operation (state.reading). This is a
  //   case where the the stream has called the implementation defined _read()
  //   method, but they are processing the call asynchronously and have _not_
  //   called push() with new data. In this case we skip performing more
  //   read()s. The execution ends in this method again after the _read() ends
  //   up calling push() with more data.
  while (!state.reading && !state.ended && (state.length < state.highWaterMark || state.flowing && state.length === 0)) {
    var len = state.length;
    debug('maybeReadMore read 0');
    stream.read(0);
    if (len === state.length) // didn't get any data, stop spinning.
      break;
  }

  state.readingMore = false;
} // abstract method.  to be overridden in specific implementation classes.
// call cb(er, data) where data is <= n in length.
// for virtual (non-string, non-buffer) streams, "length" is somewhat
// arbitrary, and perhaps not very meaningful.


Readable.prototype._read = function (n) {
  errorOrDestroy(this, new ERR_METHOD_NOT_IMPLEMENTED('_read()'));
};

Readable.prototype.pipe = function (dest, pipeOpts) {
  var src = this;
  var state = this._readableState;

  switch (state.pipesCount) {
    case 0:
      state.pipes = dest;
      break;

    case 1:
      state.pipes = [state.pipes, dest];
      break;

    default:
      state.pipes.push(dest);
      break;
  }

  state.pipesCount += 1;
  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;
  var endFn = doEnd ? onend : unpipe;
  if (state.endEmitted) process.nextTick(endFn);else src.once('end', endFn);
  dest.on('unpipe', onunpipe);

  function onunpipe(readable, unpipeInfo) {
    debug('onunpipe');

    if (readable === src) {
      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
        unpipeInfo.hasUnpiped = true;
        cleanup();
      }
    }
  }

  function onend() {
    debug('onend');
    dest.end();
  } // when the dest drains, it reduces the awaitDrain counter
  // on the source.  This would be more elegant with a .once()
  // handler in flow(), but adding and removing repeatedly is
  // too slow.


  var ondrain = pipeOnDrain(src);
  dest.on('drain', ondrain);
  var cleanedUp = false;

  function cleanup() {
    debug('cleanup'); // cleanup event handlers once the pipe is broken

    dest.removeListener('close', onclose);
    dest.removeListener('finish', onfinish);
    dest.removeListener('drain', ondrain);
    dest.removeListener('error', onerror);
    dest.removeListener('unpipe', onunpipe);
    src.removeListener('end', onend);
    src.removeListener('end', unpipe);
    src.removeListener('data', ondata);
    cleanedUp = true; // if the reader is waiting for a drain event from this
    // specific writer, then it would cause it to never start
    // flowing again.
    // So, if this is awaiting a drain, then we just call it now.
    // If we don't know, then assume that we are waiting for one.

    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
  }

  src.on('data', ondata);

  function ondata(chunk) {
    debug('ondata');
    var ret = dest.write(chunk);
    debug('dest.write', ret);

    if (ret === false) {
      // If the user unpiped during `dest.write()`, it is possible
      // to get stuck in a permanently paused state if that write
      // also returned false.
      // => Check whether `dest` is still a piping destination.
      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
        debug('false write response, pause', state.awaitDrain);
        state.awaitDrain++;
      }

      src.pause();
    }
  } // if the dest has an error, then stop piping into it.
  // however, don't suppress the throwing behavior for this.


  function onerror(er) {
    debug('onerror', er);
    unpipe();
    dest.removeListener('error', onerror);
    if (EElistenerCount(dest, 'error') === 0) errorOrDestroy(dest, er);
  } // Make sure our error handler is attached before userland ones.


  prependListener(dest, 'error', onerror); // Both close and finish should trigger unpipe, but only once.

  function onclose() {
    dest.removeListener('finish', onfinish);
    unpipe();
  }

  dest.once('close', onclose);

  function onfinish() {
    debug('onfinish');
    dest.removeListener('close', onclose);
    unpipe();
  }

  dest.once('finish', onfinish);

  function unpipe() {
    debug('unpipe');
    src.unpipe(dest);
  } // tell the dest that it's being piped to


  dest.emit('pipe', src); // start the flow if it hasn't been started already.

  if (!state.flowing) {
    debug('pipe resume');
    src.resume();
  }

  return dest;
};

function pipeOnDrain(src) {
  return function pipeOnDrainFunctionResult() {
    var state = src._readableState;
    debug('pipeOnDrain', state.awaitDrain);
    if (state.awaitDrain) state.awaitDrain--;

    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
      state.flowing = true;
      flow(src);
    }
  };
}

Readable.prototype.unpipe = function (dest) {
  var state = this._readableState;
  var unpipeInfo = {
    hasUnpiped: false
  }; // if we're not piping anywhere, then do nothing.

  if (state.pipesCount === 0) return this; // just one destination.  most common case.

  if (state.pipesCount === 1) {
    // passed in one, but it's not the right one.
    if (dest && dest !== state.pipes) return this;
    if (!dest) dest = state.pipes; // got a match.

    state.pipes = null;
    state.pipesCount = 0;
    state.flowing = false;
    if (dest) dest.emit('unpipe', this, unpipeInfo);
    return this;
  } // slow case. multiple pipe destinations.


  if (!dest) {
    // remove all.
    var dests = state.pipes;
    var len = state.pipesCount;
    state.pipes = null;
    state.pipesCount = 0;
    state.flowing = false;

    for (var i = 0; i < len; i++) {
      dests[i].emit('unpipe', this, {
        hasUnpiped: false
      });
    }

    return this;
  } // try to find the right one.


  var index = indexOf(state.pipes, dest);
  if (index === -1) return this;
  state.pipes.splice(index, 1);
  state.pipesCount -= 1;
  if (state.pipesCount === 1) state.pipes = state.pipes[0];
  dest.emit('unpipe', this, unpipeInfo);
  return this;
}; // set up data events if they are asked for
// Ensure readable listeners eventually get something


Readable.prototype.on = function (ev, fn) {
  var res = Stream.prototype.on.call(this, ev, fn);
  var state = this._readableState;

  if (ev === 'data') {
    // update readableListening so that resume() may be a no-op
    // a few lines down. This is needed to support once('readable').
    state.readableListening = this.listenerCount('readable') > 0; // Try start flowing on next tick if stream isn't explicitly paused

    if (state.flowing !== false) this.resume();
  } else if (ev === 'readable') {
    if (!state.endEmitted && !state.readableListening) {
      state.readableListening = state.needReadable = true;
      state.flowing = false;
      state.emittedReadable = false;
      debug('on readable', state.length, state.reading);

      if (state.length) {
        emitReadable(this);
      } else if (!state.reading) {
        process.nextTick(nReadingNextTick, this);
      }
    }
  }

  return res;
};

Readable.prototype.addListener = Readable.prototype.on;

Readable.prototype.removeListener = function (ev, fn) {
  var res = Stream.prototype.removeListener.call(this, ev, fn);

  if (ev === 'readable') {
    // We need to check if there is someone still listening to
    // readable and reset the state. However this needs to happen
    // after readable has been emitted but before I/O (nextTick) to
    // support once('readable', fn) cycles. This means that calling
    // resume within the same tick will have no
    // effect.
    process.nextTick(updateReadableListening, this);
  }

  return res;
};

Readable.prototype.removeAllListeners = function (ev) {
  var res = Stream.prototype.removeAllListeners.apply(this, arguments);

  if (ev === 'readable' || ev === undefined) {
    // We need to check if there is someone still listening to
    // readable and reset the state. However this needs to happen
    // after readable has been emitted but before I/O (nextTick) to
    // support once('readable', fn) cycles. This means that calling
    // resume within the same tick will have no
    // effect.
    process.nextTick(updateReadableListening, this);
  }

  return res;
};

function updateReadableListening(self) {
  var state = self._readableState;
  state.readableListening = self.listenerCount('readable') > 0;

  if (state.resumeScheduled && !state.paused) {
    // flowing needs to be set to true now, otherwise
    // the upcoming resume will not flow.
    state.flowing = true; // crude way to check if we should resume
  } else if (self.listenerCount('data') > 0) {
    self.resume();
  }
}

function nReadingNextTick(self) {
  debug('readable nexttick read 0');
  self.read(0);
} // pause() and resume() are remnants of the legacy readable stream API
// If the user uses them, then switch into old mode.


Readable.prototype.resume = function () {
  var state = this._readableState;

  if (!state.flowing) {
    debug('resume'); // we flow only if there is no one listening
    // for readable, but we still have to call
    // resume()

    state.flowing = !state.readableListening;
    resume(this, state);
  }

  state.paused = false;
  return this;
};

function resume(stream, state) {
  if (!state.resumeScheduled) {
    state.resumeScheduled = true;
    process.nextTick(resume_, stream, state);
  }
}

function resume_(stream, state) {
  debug('resume', state.reading);

  if (!state.reading) {
    stream.read(0);
  }

  state.resumeScheduled = false;
  stream.emit('resume');
  flow(stream);
  if (state.flowing && !state.reading) stream.read(0);
}

Readable.prototype.pause = function () {
  debug('call pause flowing=%j', this._readableState.flowing);

  if (this._readableState.flowing !== false) {
    debug('pause');
    this._readableState.flowing = false;
    this.emit('pause');
  }

  this._readableState.paused = true;
  return this;
};

function flow(stream) {
  var state = stream._readableState;
  debug('flow', state.flowing);

  while (state.flowing && stream.read() !== null) {
    ;
  }
} // wrap an old-style stream as the async data source.
// This is *not* part of the readable stream interface.
// It is an ugly unfortunate mess of history.


Readable.prototype.wrap = function (stream) {
  var _this = this;

  var state = this._readableState;
  var paused = false;
  stream.on('end', function () {
    debug('wrapped end');

    if (state.decoder && !state.ended) {
      var chunk = state.decoder.end();
      if (chunk && chunk.length) _this.push(chunk);
    }

    _this.push(null);
  });
  stream.on('data', function (chunk) {
    debug('wrapped data');
    if (state.decoder) chunk = state.decoder.write(chunk); // don't skip over falsy values in objectMode

    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;

    var ret = _this.push(chunk);

    if (!ret) {
      paused = true;
      stream.pause();
    }
  }); // proxy all the other methods.
  // important when wrapping filters and duplexes.

  for (var i in stream) {
    if (this[i] === undefined && typeof stream[i] === 'function') {
      this[i] = function methodWrap(method) {
        return function methodWrapReturnFunction() {
          return stream[method].apply(stream, arguments);
        };
      }(i);
    }
  } // proxy certain important events.


  for (var n = 0; n < kProxyEvents.length; n++) {
    stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));
  } // when we try to consume some more bytes, simply unpause the
  // underlying stream.


  this._read = function (n) {
    debug('wrapped _read', n);

    if (paused) {
      paused = false;
      stream.resume();
    }
  };

  return this;
};

if (typeof Symbol === 'function') {
  Readable.prototype[Symbol.asyncIterator] = function () {
    if (createReadableStreamAsyncIterator === undefined) {
      createReadableStreamAsyncIterator = reqqq('./internal/streams/async_iterator');
    }

    return createReadableStreamAsyncIterator(this);
  };
}

Object.defineProperty(Readable.prototype, 'readableHighWaterMark', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._readableState.highWaterMark;
  }
});
Object.defineProperty(Readable.prototype, 'readableBuffer', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._readableState && this._readableState.buffer;
  }
});
Object.defineProperty(Readable.prototype, 'readableFlowing', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._readableState.flowing;
  },
  set: function set(state) {
    if (this._readableState) {
      this._readableState.flowing = state;
    }
  }
}); // exposed for testing purposes only.

Readable._fromList = fromList;
Object.defineProperty(Readable.prototype, 'readableLength', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._readableState.length;
  }
}); // Pluck off n bytes from an array of buffers.
// Length is the combined lengths of all the buffers in the list.
// This function is designed to be inlinable, so please take care when making
// changes to the function body.

function fromList(n, state) {
  // nothing buffered
  if (state.length === 0) return null;
  var ret;
  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
    // read it all, truncate the list
    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.first();else ret = state.buffer.concat(state.length);
    state.buffer.clear();
  } else {
    // read part of list
    ret = state.buffer.consume(n, state.decoder);
  }
  return ret;
}

function endReadable(stream) {
  var state = stream._readableState;
  debug('endReadable', state.endEmitted);

  if (!state.endEmitted) {
    state.ended = true;
    process.nextTick(endReadableNT, state, stream);
  }
}

function endReadableNT(state, stream) {
  debug('endReadableNT', state.endEmitted, state.length); // Check that we didn't get one last unshift.

  if (!state.endEmitted && state.length === 0) {
    state.endEmitted = true;
    stream.readable = false;
    stream.emit('end');

    if (state.autoDestroy) {
      // In case of duplex streams we need a way to detect
      // if the writable side is ready for autoDestroy as well
      var wState = stream._writableState;

      if (!wState || wState.autoDestroy && wState.finished) {
        stream.destroy();
      }
    }
  }
}

if (typeof Symbol === 'function') {
  Readable.from = function (iterable, opts) {
    if (from === undefined) {
      from = reqqq('./internal/streams/from');
    }

    return from(Readable, iterable, opts);
  };
}

function indexOf(xs, x) {
  for (var i = 0, l = xs.length; i < l; i++) {
    if (xs[i] === x) return i;
  }

  return -1;
}
}).call(this)}).call(this,reqqq('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"../errors":29,"./_stream_duplex":30,"./internal/streams/async_iterator":35,"./internal/streams/buffer_list":36,"./internal/streams/destroy":37,"./internal/streams/from":39,"./internal/streams/state":41,"./internal/streams/stream":42,"_process":20,"buffer":4,"events":6,"inherits":10,"string_decoder/":62,"util":3}],33:[function(reqqq,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a transform stream is a readable/writable stream where you do
// something with the data.  Sometimes it's called a "filter",
// but that's not a great name for it, since that implies a thing where
// some bits pass through, and others are simply ignored.  (That would
// be a valid example of a transform, of course.)
//
// While the output is causally related to the input, it's not a
// necessarily symmetric or synchronous transformation.  For example,
// a zlib stream might take multiple plain-text writes(), and then
// emit a single compressed chunk some time in the future.
//
// Here's how this works:
//
// The Transform stream has all the aspects of the readable and writable
// stream classes.  When you write(chunk), that calls _write(chunk,cb)
// internally, and returns false if there's a lot of pending writes
// buffered up.  When you call read(), that calls _read(n) until
// there's enough pending readable data buffered up.
//
// In a transform stream, the written data is placed in a buffer.  When
// _read(n) is called, it transforms the queued up data, calling the
// buffered _write cb's as it consumes chunks.  If consuming a single
// written chunk would result in multiple output chunks, then the first
// outputted bit calls the readcb, and subsequent chunks just go into
// the read buffer, and will cause it to emit 'readable' if necessary.
//
// This way, back-pressure is actually determined by the reading side,
// since _read has to be called to start processing a new chunk.  However,
// a pathological inflate type of transform can cause excessive buffering
// here.  For example, imagine a stream where every byte of input is
// interpreted as an integer from 0-255, and then results in that many
// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
// 1kb of data being output.  In this case, you could write a very small
// amount of input, and end up with a very large amount of output.  In
// such a pathological inflating mechanism, there'd be no way to tell
// the system to stop doing the transform.  A single 4MB write could
// cause the system to run out of memory.
//
// However, even in such a pathological case, only a single written chunk
// would be consumed, and then the rest would wait (un-transformed) until
// the results of the previous transformed chunk were consumed.
'use strict';

module.exports = Transform;

var _reqqq$codes = reqqq('../errors').codes,
    ERR_METHOD_NOT_IMPLEMENTED = _reqqq$codes.ERR_METHOD_NOT_IMPLEMENTED,
    ERR_MULTIPLE_CALLBACK = _reqqq$codes.ERR_MULTIPLE_CALLBACK,
    ERR_TRANSFORM_ALREADY_TRANSFORMING = _reqqq$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,
    ERR_TRANSFORM_WITH_LENGTH_0 = _reqqq$codes.ERR_TRANSFORM_WITH_LENGTH_0;

var Duplex = reqqq('./_stream_duplex');

reqqq('inherits')(Transform, Duplex);

function afterTransform(er, data) {
  var ts = this._transformState;
  ts.transforming = false;
  var cb = ts.writecb;

  if (cb === null) {
    return this.emit('error', new ERR_MULTIPLE_CALLBACK());
  }

  ts.writechunk = null;
  ts.writecb = null;
  if (data != null) // single equals check for both `null` and `undefined`
    this.push(data);
  cb(er);
  var rs = this._readableState;
  rs.reading = false;

  if (rs.needReadable || rs.length < rs.highWaterMark) {
    this._read(rs.highWaterMark);
  }
}

function Transform(options) {
  if (!(this instanceof Transform)) return new Transform(options);
  Duplex.call(this, options);
  this._transformState = {
    afterTransform: afterTransform.bind(this),
    needTransform: false,
    transforming: false,
    writecb: null,
    writechunk: null,
    writeencoding: null
  }; // start out asking for a readable event once data is transformed.

  this._readableState.needReadable = true; // we have implemented the _read method, and done the other things
  // that Readable wants before the first _read call, so unset the
  // sync guard flag.

  this._readableState.sync = false;

  if (options) {
    if (typeof options.transform === 'function') this._transform = options.transform;
    if (typeof options.flush === 'function') this._flush = options.flush;
  } // When the writable side finishes, then flush out anything remaining.


  this.on('prefinish', prefinish);
}

function prefinish() {
  var _this = this;

  if (typeof this._flush === 'function' && !this._readableState.destroyed) {
    this._flush(function (er, data) {
      done(_this, er, data);
    });
  } else {
    done(this, null, null);
  }
}

Transform.prototype.push = function (chunk, encoding) {
  this._transformState.needTransform = false;
  return Duplex.prototype.push.call(this, chunk, encoding);
}; // This is the part where you do stuff!
// override this function in implementation classes.
// 'chunk' is an input chunk.
//
// Call `push(newChunk)` to pass along transformed output
// to the readable side.  You may call 'push' zero or more times.
//
// Call `cb(err)` when you are done with this chunk.  If you pass
// an error, then that'll put the hurt on the whole operation.  If you
// never call cb(), then you'll never get another chunk.


Transform.prototype._transform = function (chunk, encoding, cb) {
  cb(new ERR_METHOD_NOT_IMPLEMENTED('_transform()'));
};

Transform.prototype._write = function (chunk, encoding, cb) {
  var ts = this._transformState;
  ts.writecb = cb;
  ts.writechunk = chunk;
  ts.writeencoding = encoding;

  if (!ts.transforming) {
    var rs = this._readableState;
    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
  }
}; // Doesn't matter what the args are here.
// _transform does all the work.
// That we got here means that the readable side wants more data.


Transform.prototype._read = function (n) {
  var ts = this._transformState;

  if (ts.writechunk !== null && !ts.transforming) {
    ts.transforming = true;

    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
  } else {
    // mark that we need a transform, so that any data that comes in
    // will get processed, now that we've asked for it.
    ts.needTransform = true;
  }
};

Transform.prototype._destroy = function (err, cb) {
  Duplex.prototype._destroy.call(this, err, function (err2) {
    cb(err2);
  });
};

function done(stream, er, data) {
  if (er) return stream.emit('error', er);
  if (data != null) // single equals check for both `null` and `undefined`
    stream.push(data); // TODO(BridgeAR): Write a test for these two error cases
  // if there's nothing in the write buffer, then that means
  // that nothing more will ever be provided

  if (stream._writableState.length) throw new ERR_TRANSFORM_WITH_LENGTH_0();
  if (stream._transformState.transforming) throw new ERR_TRANSFORM_ALREADY_TRANSFORMING();
  return stream.push(null);
}
},{"../errors":29,"./_stream_duplex":30,"inherits":10}],34:[function(reqqq,module,exports){
(function (process,global){(function (){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// A bit simpler than readable streams.
// Implement an async ._write(chunk, encoding, cb), and it'll handle all
// the drain event emission and buffering.
'use strict';

module.exports = Writable;
/* <replacement> */

function WriteReq(chunk, encoding, cb) {
  this.chunk = chunk;
  this.encoding = encoding;
  this.callback = cb;
  this.next = null;
} // It seems a linked list but it is not
// there will be only 2 of these for each stream


function CorkedRequest(state) {
  var _this = this;

  this.next = null;
  this.entry = null;

  this.finish = function () {
    onCorkedFinish(_this, state);
  };
}
/* </replacement> */

/*<replacement>*/


var Duplex;
/*</replacement>*/

Writable.WritableState = WritableState;
/*<replacement>*/

var internalUtil = {
  deprecate: reqqq('util-deprecate')
};
/*</replacement>*/

/*<replacement>*/

var Stream = reqqq('./internal/streams/stream');
/*</replacement>*/


var Buffer = reqqq('buffer').Buffer;

var OurUint8Array = global.Uint8Array || function () {};

function _uint8ArrayToBuffer(chunk) {
  return Buffer.from(chunk);
}

function _isUint8Array(obj) {
  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}

var destroyImpl = reqqq('./internal/streams/destroy');

var _reqqq = reqqq('./internal/streams/state'),
    getHighWaterMark = _reqqq.getHighWaterMark;

var _reqqq$codes = reqqq('../errors').codes,
    ERR_INVALID_ARG_TYPE = _reqqq$codes.ERR_INVALID_ARG_TYPE,
    ERR_METHOD_NOT_IMPLEMENTED = _reqqq$codes.ERR_METHOD_NOT_IMPLEMENTED,
    ERR_MULTIPLE_CALLBACK = _reqqq$codes.ERR_MULTIPLE_CALLBACK,
    ERR_STREAM_CANNOT_PIPE = _reqqq$codes.ERR_STREAM_CANNOT_PIPE,
    ERR_STREAM_DESTROYED = _reqqq$codes.ERR_STREAM_DESTROYED,
    ERR_STREAM_NULL_VALUES = _reqqq$codes.ERR_STREAM_NULL_VALUES,
    ERR_STREAM_WRITE_AFTER_END = _reqqq$codes.ERR_STREAM_WRITE_AFTER_END,
    ERR_UNKNOWN_ENCODING = _reqqq$codes.ERR_UNKNOWN_ENCODING;

var errorOrDestroy = destroyImpl.errorOrDestroy;

reqqq('inherits')(Writable, Stream);

function nop() {}

function WritableState(options, stream, isDuplex) {
  Duplex = Duplex || reqqq('./_stream_duplex');
  options = options || {}; // Duplex streams are both readable and writable, but share
  // the same options object.
  // However, some cases reqqq setting options to different
  // values for the readable and the writable sides of the duplex stream,
  // e.g. options.readableObjectMode vs. options.writableObjectMode, etc.

  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag to indicate whether or not this stream
  // contains buffers or objects.

  this.objectMode = !!options.objectMode;
  if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode; // the point at which write() starts returning false
  // Note: 0 is a valid value, means that we always return false if
  // the entire buffer is not flushed immediately on write()

  this.highWaterMark = getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex); // if _final has been called

  this.finalCalled = false; // drain event flag.

  this.needDrain = false; // at the start of calling end()

  this.ending = false; // when end() has been called, and returned

  this.ended = false; // when 'finish' is emitted

  this.finished = false; // has it been destroyed

  this.destroyed = false; // should we decode strings into buffers before passing to _write?
  // this is here so that some node-core streams can optimize string
  // handling at a lower level.

  var noDecode = options.decodeStrings === false;
  this.decodeStrings = !noDecode; // Crypto is kind of old and crusty.  Historically, its default string
  // encoding is 'binary' so we have to make this configurable.
  // Everything else in the universe uses 'utf8', though.

  this.defaultEncoding = options.defaultEncoding || 'utf8'; // not an actual buffer we keep track of, but a measurement
  // of how much we're waiting to get pushed to some underlying
  // socket or file.

  this.length = 0; // a flag to see when we're in the middle of a write.

  this.writing = false; // when true all writes will be buffered until .uncork() call

  this.corked = 0; // a flag to be able to tell if the onwrite cb is called immediately,
  // or on a later tick.  We set this to true at first, because any
  // actions that shouldn't happen until "later" should generally also
  // not happen before the first write call.

  this.sync = true; // a flag to know if we're processing previously buffered items, which
  // may call the _write() callback in the same tick, so that we don't
  // end up in an overlapped onwrite situation.

  this.bufferProcessing = false; // the callback that's passed to _write(chunk,cb)

  this.onwrite = function (er) {
    onwrite(stream, er);
  }; // the callback that the user supplies to write(chunk,encoding,cb)


  this.writecb = null; // the amount that is being written when _write is called.

  this.writelen = 0;
  this.bufferedRequest = null;
  this.lastBufferedRequest = null; // number of pending user-supplied write callbacks
  // this must be 0 before 'finish' can be emitted

  this.pendingcb = 0; // emit prefinish if the only thing we're waiting for is _write cbs
  // This is relevant for synchronous Transform streams

  this.prefinished = false; // True if the error was already emitted and should not be thrown again

  this.errorEmitted = false; // Should close be emitted on destroy. Defaults to true.

  this.emitClose = options.emitClose !== false; // Should .destroy() be called after 'finish' (and potentially 'end')

  this.autoDestroy = !!options.autoDestroy; // count buffered requests

  this.bufferedRequestCount = 0; // allocate the first CorkedRequest, there is always
  // one allocated and free to use, and we maintain at most two

  this.corkedRequestsFree = new CorkedRequest(this);
}

WritableState.prototype.getBuffer = function getBuffer() {
  var current = this.bufferedRequest;
  var out = [];

  while (current) {
    out.push(current);
    current = current.next;
  }

  return out;
};

(function () {
  try {
    Object.defineProperty(WritableState.prototype, 'buffer', {
      get: internalUtil.deprecate(function writableStateBufferGetter() {
        return this.getBuffer();
      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')
    });
  } catch (_) {}
})(); // Test _writableState for inheritance to account for Duplex streams,
// whose prototype chain only points to Readable.


var realHasInstance;

if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {
  realHasInstance = Function.prototype[Symbol.hasInstance];
  Object.defineProperty(Writable, Symbol.hasInstance, {
    value: function value(object) {
      if (realHasInstance.call(this, object)) return true;
      if (this !== Writable) return false;
      return object && object._writableState instanceof WritableState;
    }
  });
} else {
  realHasInstance = function realHasInstance(object) {
    return object instanceof this;
  };
}

function Writable(options) {
  Duplex = Duplex || reqqq('./_stream_duplex'); // Writable ctor is applied to Duplexes, too.
  // `realHasInstance` is necessary because using plain `instanceof`
  // would return false, as no `_writableState` property is attached.
  // Trying to use the custom `instanceof` for Writable here will also break the
  // Node.js LazyTransform implementation, which has a non-trivial getter for
  // `_writableState` that would lead to infinite recursion.
  // Checking for a Stream.Duplex instance is faster here instead of inside
  // the WritableState constructor, at least with V8 6.5

  var isDuplex = this instanceof Duplex;
  if (!isDuplex && !realHasInstance.call(Writable, this)) return new Writable(options);
  this._writableState = new WritableState(options, this, isDuplex); // legacy.

  this.writable = true;

  if (options) {
    if (typeof options.write === 'function') this._write = options.write;
    if (typeof options.writev === 'function') this._writev = options.writev;
    if (typeof options.destroy === 'function') this._destroy = options.destroy;
    if (typeof options.final === 'function') this._final = options.final;
  }

  Stream.call(this);
} // Otherwise people can pipe Writable streams, which is just wrong.


Writable.prototype.pipe = function () {
  errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE());
};

function writeAfterEnd(stream, cb) {
  var er = new ERR_STREAM_WRITE_AFTER_END(); // TODO: defer error events consistently everywhere, not just the cb

  errorOrDestroy(stream, er);
  process.nextTick(cb, er);
} // Checks that a user-supplied chunk is valid, especially for the particular
// mode the stream is in. Currently this means that `null` is never accepted
// and undefined/non-string values are only allowed in object mode.


function validChunk(stream, state, chunk, cb) {
  var er;

  if (chunk === null) {
    er = new ERR_STREAM_NULL_VALUES();
  } else if (typeof chunk !== 'string' && !state.objectMode) {
    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer'], chunk);
  }

  if (er) {
    errorOrDestroy(stream, er);
    process.nextTick(cb, er);
    return false;
  }

  return true;
}

Writable.prototype.write = function (chunk, encoding, cb) {
  var state = this._writableState;
  var ret = false;

  var isBuf = !state.objectMode && _isUint8Array(chunk);

  if (isBuf && !Buffer.isBuffer(chunk)) {
    chunk = _uint8ArrayToBuffer(chunk);
  }

  if (typeof encoding === 'function') {
    cb = encoding;
    encoding = null;
  }

  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
  if (typeof cb !== 'function') cb = nop;
  if (state.ending) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {
    state.pendingcb++;
    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);
  }
  return ret;
};

Writable.prototype.cork = function () {
  this._writableState.corked++;
};

Writable.prototype.uncork = function () {
  var state = this._writableState;

  if (state.corked) {
    state.corked--;
    if (!state.writing && !state.corked && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
  }
};

Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
  // node::ParseEncoding() reqqqs lower case.
  if (typeof encoding === 'string') encoding = encoding.toLowerCase();
  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new ERR_UNKNOWN_ENCODING(encoding);
  this._writableState.defaultEncoding = encoding;
  return this;
};

Object.defineProperty(Writable.prototype, 'writableBuffer', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._writableState && this._writableState.getBuffer();
  }
});

function decodeChunk(state, chunk, encoding) {
  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
    chunk = Buffer.from(chunk, encoding);
  }

  return chunk;
}

Object.defineProperty(Writable.prototype, 'writableHighWaterMark', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._writableState.highWaterMark;
  }
}); // if we're already writing something, then just put this
// in the queue, and wait our turn.  Otherwise, call _write
// If we return false, then we need a drain event, so set that flag.

function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {
  if (!isBuf) {
    var newChunk = decodeChunk(state, chunk, encoding);

    if (chunk !== newChunk) {
      isBuf = true;
      encoding = 'buffer';
      chunk = newChunk;
    }
  }

  var len = state.objectMode ? 1 : chunk.length;
  state.length += len;
  var ret = state.length < state.highWaterMark; // we must ensure that previous needDrain will not be reset to false.

  if (!ret) state.needDrain = true;

  if (state.writing || state.corked) {
    var last = state.lastBufferedRequest;
    state.lastBufferedRequest = {
      chunk: chunk,
      encoding: encoding,
      isBuf: isBuf,
      callback: cb,
      next: null
    };

    if (last) {
      last.next = state.lastBufferedRequest;
    } else {
      state.bufferedRequest = state.lastBufferedRequest;
    }

    state.bufferedRequestCount += 1;
  } else {
    doWrite(stream, state, false, len, chunk, encoding, cb);
  }

  return ret;
}

function doWrite(stream, state, writev, len, chunk, encoding, cb) {
  state.writelen = len;
  state.writecb = cb;
  state.writing = true;
  state.sync = true;
  if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED('write'));else if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
  state.sync = false;
}

function onwriteError(stream, state, sync, er, cb) {
  --state.pendingcb;

  if (sync) {
    // defer the callback if we are being called synchronously
    // to avoid piling up things on the stack
    process.nextTick(cb, er); // this can emit finish, and it will always happen
    // after error

    process.nextTick(finishMaybe, stream, state);
    stream._writableState.errorEmitted = true;
    errorOrDestroy(stream, er);
  } else {
    // the caller expect this to happen before if
    // it is async
    cb(er);
    stream._writableState.errorEmitted = true;
    errorOrDestroy(stream, er); // this can emit finish, but finish must
    // always follow error

    finishMaybe(stream, state);
  }
}

function onwriteStateUpdate(state) {
  state.writing = false;
  state.writecb = null;
  state.length -= state.writelen;
  state.writelen = 0;
}

function onwrite(stream, er) {
  var state = stream._writableState;
  var sync = state.sync;
  var cb = state.writecb;
  if (typeof cb !== 'function') throw new ERR_MULTIPLE_CALLBACK();
  onwriteStateUpdate(state);
  if (er) onwriteError(stream, state, sync, er, cb);else {
    // Check if we're actually ready to finish, but don't emit yet
    var finished = needFinish(state) || stream.destroyed;

    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
      clearBuffer(stream, state);
    }

    if (sync) {
      process.nextTick(afterWrite, stream, state, finished, cb);
    } else {
      afterWrite(stream, state, finished, cb);
    }
  }
}

function afterWrite(stream, state, finished, cb) {
  if (!finished) onwriteDrain(stream, state);
  state.pendingcb--;
  cb();
  finishMaybe(stream, state);
} // Must force callback to be called on nextTick, so that we don't
// emit 'drain' before the write() consumer gets the 'false' return
// value, and has a chance to attach a 'drain' listener.


function onwriteDrain(stream, state) {
  if (state.length === 0 && state.needDrain) {
    state.needDrain = false;
    stream.emit('drain');
  }
} // if there's something in the buffer waiting, then process it


function clearBuffer(stream, state) {
  state.bufferProcessing = true;
  var entry = state.bufferedRequest;

  if (stream._writev && entry && entry.next) {
    // Fast case, write everything using _writev()
    var l = state.bufferedRequestCount;
    var buffer = new Array(l);
    var holder = state.corkedRequestsFree;
    holder.entry = entry;
    var count = 0;
    var allBuffers = true;

    while (entry) {
      buffer[count] = entry;
      if (!entry.isBuf) allBuffers = false;
      entry = entry.next;
      count += 1;
    }

    buffer.allBuffers = allBuffers;
    doWrite(stream, state, true, state.length, buffer, '', holder.finish); // doWrite is almost always async, defer these to save a bit of time
    // as the hot path ends with doWrite

    state.pendingcb++;
    state.lastBufferedRequest = null;

    if (holder.next) {
      state.corkedRequestsFree = holder.next;
      holder.next = null;
    } else {
      state.corkedRequestsFree = new CorkedRequest(state);
    }

    state.bufferedRequestCount = 0;
  } else {
    // Slow case, write chunks one-by-one
    while (entry) {
      var chunk = entry.chunk;
      var encoding = entry.encoding;
      var cb = entry.callback;
      var len = state.objectMode ? 1 : chunk.length;
      doWrite(stream, state, false, len, chunk, encoding, cb);
      entry = entry.next;
      state.bufferedRequestCount--; // if we didn't call the onwrite immediately, then
      // it means that we need to wait until it does.
      // also, that means that the chunk and cb are currently
      // being processed, so move the buffer counter past them.

      if (state.writing) {
        break;
      }
    }

    if (entry === null) state.lastBufferedRequest = null;
  }

  state.bufferedRequest = entry;
  state.bufferProcessing = false;
}

Writable.prototype._write = function (chunk, encoding, cb) {
  cb(new ERR_METHOD_NOT_IMPLEMENTED('_write()'));
};

Writable.prototype._writev = null;

Writable.prototype.end = function (chunk, encoding, cb) {
  var state = this._writableState;

  if (typeof chunk === 'function') {
    cb = chunk;
    chunk = null;
    encoding = null;
  } else if (typeof encoding === 'function') {
    cb = encoding;
    encoding = null;
  }

  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding); // .end() fully uncorks

  if (state.corked) {
    state.corked = 1;
    this.uncork();
  } // ignore unnecessary end() calls.


  if (!state.ending) endWritable(this, state, cb);
  return this;
};

Object.defineProperty(Writable.prototype, 'writableLength', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    return this._writableState.length;
  }
});

function needFinish(state) {
  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
}

function callFinal(stream, state) {
  stream._final(function (err) {
    state.pendingcb--;

    if (err) {
      errorOrDestroy(stream, err);
    }

    state.prefinished = true;
    stream.emit('prefinish');
    finishMaybe(stream, state);
  });
}

function prefinish(stream, state) {
  if (!state.prefinished && !state.finalCalled) {
    if (typeof stream._final === 'function' && !state.destroyed) {
      state.pendingcb++;
      state.finalCalled = true;
      process.nextTick(callFinal, stream, state);
    } else {
      state.prefinished = true;
      stream.emit('prefinish');
    }
  }
}

function finishMaybe(stream, state) {
  var need = needFinish(state);

  if (need) {
    prefinish(stream, state);

    if (state.pendingcb === 0) {
      state.finished = true;
      stream.emit('finish');

      if (state.autoDestroy) {
        // In case of duplex streams we need a way to detect
        // if the readable side is ready for autoDestroy as well
        var rState = stream._readableState;

        if (!rState || rState.autoDestroy && rState.endEmitted) {
          stream.destroy();
        }
      }
    }
  }

  return need;
}

function endWritable(stream, state, cb) {
  state.ending = true;
  finishMaybe(stream, state);

  if (cb) {
    if (state.finished) process.nextTick(cb);else stream.once('finish', cb);
  }

  state.ended = true;
  stream.writable = false;
}

function onCorkedFinish(corkReq, state, err) {
  var entry = corkReq.entry;
  corkReq.entry = null;

  while (entry) {
    var cb = entry.callback;
    state.pendingcb--;
    cb(err);
    entry = entry.next;
  } // reuse the free corkReq.


  state.corkedRequestsFree.next = corkReq;
}

Object.defineProperty(Writable.prototype, 'destroyed', {
  // making it explicit this property is not enumerable
  // because otherwise some prototype manipulation in
  // userland will fail
  enumerable: false,
  get: function get() {
    if (this._writableState === undefined) {
      return false;
    }

    return this._writableState.destroyed;
  },
  set: function set(value) {
    // we ignore the value if the stream
    // has not been initialized yet
    if (!this._writableState) {
      return;
    } // backward compatibility, the user is explicitly
    // managing destroyed


    this._writableState.destroyed = value;
  }
});
Writable.prototype.destroy = destroyImpl.destroy;
Writable.prototype._undestroy = destroyImpl.undestroy;

Writable.prototype._destroy = function (err, cb) {
  cb(err);
};
}).call(this)}).call(this,reqqq('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"../errors":29,"./_stream_duplex":30,"./internal/streams/destroy":37,"./internal/streams/state":41,"./internal/streams/stream":42,"_process":20,"buffer":4,"inherits":10,"util-deprecate":66}],35:[function(reqqq,module,exports){
(function (process){(function (){
'use strict';

var _Object$setPrototypeO;

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var finished = reqqq('./end-of-stream');

var kLastResolve = Symbol('lastResolve');
var kLastReject = Symbol('lastReject');
var kError = Symbol('error');
var kEnded = Symbol('ended');
var kLastPromise = Symbol('lastPromise');
var kHandlePromise = Symbol('handlePromise');
var kStream = Symbol('stream');

function createIterResult(value, done) {
  return {
    value: value,
    done: done
  };
}

function readAndResolve(iter) {
  var resolve = iter[kLastResolve];

  if (resolve !== null) {
    var data = iter[kStream].read(); // we defer if data is null
    // we can be expecting either 'end' or
    // 'error'

    if (data !== null) {
      iter[kLastPromise] = null;
      iter[kLastResolve] = null;
      iter[kLastReject] = null;
      resolve(createIterResult(data, false));
    }
  }
}

function onReadable(iter) {
  // we wait for the next tick, because it might
  // emit an error with process.nextTick
  process.nextTick(readAndResolve, iter);
}

function wrapForNext(lastPromise, iter) {
  return function (resolve, reject) {
    lastPromise.then(function () {
      if (iter[kEnded]) {
        resolve(createIterResult(undefined, true));
        return;
      }

      iter[kHandlePromise](resolve, reject);
    }, reject);
  };
}

var AsyncIteratorPrototype = Object.getPrototypeOf(function () {});
var ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf((_Object$setPrototypeO = {
  get stream() {
    return this[kStream];
  },

  next: function next() {
    var _this = this;

    // if we have detected an error in the meanwhile
    // reject straight away
    var error = this[kError];

    if (error !== null) {
      return Promise.reject(error);
    }

    if (this[kEnded]) {
      return Promise.resolve(createIterResult(undefined, true));
    }

    if (this[kStream].destroyed) {
      // We need to defer via nextTick because if .destroy(err) is
      // called, the error will be emitted via nextTick, and
      // we cannot guarantee that there is no error lingering around
      // waiting to be emitted.
      return new Promise(function (resolve, reject) {
        process.nextTick(function () {
          if (_this[kError]) {
            reject(_this[kError]);
          } else {
            resolve(createIterResult(undefined, true));
          }
        });
      });
    } // if we have multiple next() calls
    // we will wait for the previous Promise to finish
    // this logic is optimized to support for await loops,
    // where next() is only called once at a time


    var lastPromise = this[kLastPromise];
    var promise;

    if (lastPromise) {
      promise = new Promise(wrapForNext(lastPromise, this));
    } else {
      // fast path needed to support multiple this.push()
      // without triggering the next() queue
      var data = this[kStream].read();

      if (data !== null) {
        return Promise.resolve(createIterResult(data, false));
      }

      promise = new Promise(this[kHandlePromise]);
    }

    this[kLastPromise] = promise;
    return promise;
  }
}, _defineProperty(_Object$setPrototypeO, Symbol.asyncIterator, function () {
  return this;
}), _defineProperty(_Object$setPrototypeO, "return", function _return() {
  var _this2 = this;

  // destroy(err, cb) is a private API
  // we can guarantee we have that here, because we control the
  // Readable class this is attached to
  return new Promise(function (resolve, reject) {
    _this2[kStream].destroy(null, function (err) {
      if (err) {
        reject(err);
        return;
      }

      resolve(createIterResult(undefined, true));
    });
  });
}), _Object$setPrototypeO), AsyncIteratorPrototype);

var createReadableStreamAsyncIterator = function createReadableStreamAsyncIterator(stream) {
  var _Object$create;

  var iterator = Object.create(ReadableStreamAsyncIteratorPrototype, (_Object$create = {}, _defineProperty(_Object$create, kStream, {
    value: stream,
    writable: true
  }), _defineProperty(_Object$create, kLastResolve, {
    value: null,
    writable: true
  }), _defineProperty(_Object$create, kLastReject, {
    value: null,
    writable: true
  }), _defineProperty(_Object$create, kError, {
    value: null,
    writable: true
  }), _defineProperty(_Object$create, kEnded, {
    value: stream._readableState.endEmitted,
    writable: true
  }), _defineProperty(_Object$create, kHandlePromise, {
    value: function value(resolve, reject) {
      var data = iterator[kStream].read();

      if (data) {
        iterator[kLastPromise] = null;
        iterator[kLastResolve] = null;
        iterator[kLastReject] = null;
        resolve(createIterResult(data, false));
      } else {
        iterator[kLastResolve] = resolve;
        iterator[kLastReject] = reject;
      }
    },
    writable: true
  }), _Object$create));
  iterator[kLastPromise] = null;
  finished(stream, function (err) {
    if (err && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {
      var reject = iterator[kLastReject]; // reject if we are waiting for data in the Promise
      // returned by next() and store the error

      if (reject !== null) {
        iterator[kLastPromise] = null;
        iterator[kLastResolve] = null;
        iterator[kLastReject] = null;
        reject(err);
      }

      iterator[kError] = err;
      return;
    }

    var resolve = iterator[kLastResolve];

    if (resolve !== null) {
      iterator[kLastPromise] = null;
      iterator[kLastResolve] = null;
      iterator[kLastReject] = null;
      resolve(createIterResult(undefined, true));
    }

    iterator[kEnded] = true;
  });
  stream.on('readable', onReadable.bind(null, iterator));
  return iterator;
};

module.exports = createReadableStreamAsyncIterator;
}).call(this)}).call(this,reqqq('_process'))
},{"./end-of-stream":38,"_process":20}],36:[function(reqqq,module,exports){
'use strict';

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var _reqqq = reqqq('buffer'),
    Buffer = _reqqq.Buffer;

var _reqqq2 = reqqq('util'),
    inspect = _reqqq2.inspect;

var custom = inspect && inspect.custom || 'inspect';

function copyBuffer(src, target, offset) {
  Buffer.prototype.copy.call(src, target, offset);
}

module.exports =
/*#__PURE__*/
function () {
  function BufferList() {
    _classCallCheck(this, BufferList);

    this.head = null;
    this.tail = null;
    this.length = 0;
  }

  _createClass(BufferList, [{
    key: "push",
    value: function push(v) {
      var entry = {
        data: v,
        next: null
      };
      if (this.length > 0) this.tail.next = entry;else this.head = entry;
      this.tail = entry;
      ++this.length;
    }
  }, {
    key: "unshift",
    value: function unshift(v) {
      var entry = {
        data: v,
        next: this.head
      };
      if (this.length === 0) this.tail = entry;
      this.head = entry;
      ++this.length;
    }
  }, {
    key: "shift",
    value: function shift() {
      if (this.length === 0) return;
      var ret = this.head.data;
      if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
      --this.length;
      return ret;
    }
  }, {
    key: "clear",
    value: function clear() {
      this.head = this.tail = null;
      this.length = 0;
    }
  }, {
    key: "join",
    value: function join(s) {
      if (this.length === 0) return '';
      var p = this.head;
      var ret = '' + p.data;

      while (p = p.next) {
        ret += s + p.data;
      }

      return ret;
    }
  }, {
    key: "concat",
    value: function concat(n) {
      if (this.length === 0) return Buffer.alloc(0);
      var ret = Buffer.allocUnsafe(n >>> 0);
      var p = this.head;
      var i = 0;

      while (p) {
        copyBuffer(p.data, ret, i);
        i += p.data.length;
        p = p.next;
      }

      return ret;
    } // Consumes a specified amount of bytes or characters from the buffered data.

  }, {
    key: "consume",
    value: function consume(n, hasStrings) {
      var ret;

      if (n < this.head.data.length) {
        // `slice` is the same for buffers and strings.
        ret = this.head.data.slice(0, n);
        this.head.data = this.head.data.slice(n);
      } else if (n === this.head.data.length) {
        // First chunk is a perfect match.
        ret = this.shift();
      } else {
        // Result spans more than one buffer.
        ret = hasStrings ? this._getString(n) : this._getBuffer(n);
      }

      return ret;
    }
  }, {
    key: "first",
    value: function first() {
      return this.head.data;
    } // Consumes a specified amount of characters from the buffered data.

  }, {
    key: "_getString",
    value: function _getString(n) {
      var p = this.head;
      var c = 1;
      var ret = p.data;
      n -= ret.length;

      while (p = p.next) {
        var str = p.data;
        var nb = n > str.length ? str.length : n;
        if (nb === str.length) ret += str;else ret += str.slice(0, n);
        n -= nb;

        if (n === 0) {
          if (nb === str.length) {
            ++c;
            if (p.next) this.head = p.next;else this.head = this.tail = null;
          } else {
            this.head = p;
            p.data = str.slice(nb);
          }

          break;
        }

        ++c;
      }

      this.length -= c;
      return ret;
    } // Consumes a specified amount of bytes from the buffered data.

  }, {
    key: "_getBuffer",
    value: function _getBuffer(n) {
      var ret = Buffer.allocUnsafe(n);
      var p = this.head;
      var c = 1;
      p.data.copy(ret);
      n -= p.data.length;

      while (p = p.next) {
        var buf = p.data;
        var nb = n > buf.length ? buf.length : n;
        buf.copy(ret, ret.length - n, 0, nb);
        n -= nb;

        if (n === 0) {
          if (nb === buf.length) {
            ++c;
            if (p.next) this.head = p.next;else this.head = this.tail = null;
          } else {
            this.head = p;
            p.data = buf.slice(nb);
          }

          break;
        }

        ++c;
      }

      this.length -= c;
      return ret;
    } // Make sure the linked list only shows the minimal necessary information.

  }, {
    key: custom,
    value: function value(_, options) {
      return inspect(this, _objectSpread({}, options, {
        // Only inspect one level.
        depth: 0,
        // It should not recurse.
        customInspect: false
      }));
    }
  }]);

  return BufferList;
}();
},{"buffer":4,"util":3}],37:[function(reqqq,module,exports){
(function (process){(function (){
'use strict'; // undocumented cb() API, needed for core, not for public API

function destroy(err, cb) {
  var _this = this;

  var readableDestroyed = this._readableState && this._readableState.destroyed;
  var writableDestroyed = this._writableState && this._writableState.destroyed;

  if (readableDestroyed || writableDestroyed) {
    if (cb) {
      cb(err);
    } else if (err) {
      if (!this._writableState) {
        process.nextTick(emitErrorNT, this, err);
      } else if (!this._writableState.errorEmitted) {
        this._writableState.errorEmitted = true;
        process.nextTick(emitErrorNT, this, err);
      }
    }

    return this;
  } // we set destroyed to true before firing error callbacks in order
  // to make it re-entrance safe in case destroy() is called within callbacks


  if (this._readableState) {
    this._readableState.destroyed = true;
  } // if this is a duplex stream mark the writable part as destroyed as well


  if (this._writableState) {
    this._writableState.destroyed = true;
  }

  this._destroy(err || null, function (err) {
    if (!cb && err) {
      if (!_this._writableState) {
        process.nextTick(emitErrorAndCloseNT, _this, err);
      } else if (!_this._writableState.errorEmitted) {
        _this._writableState.errorEmitted = true;
        process.nextTick(emitErrorAndCloseNT, _this, err);
      } else {
        process.nextTick(emitCloseNT, _this);
      }
    } else if (cb) {
      process.nextTick(emitCloseNT, _this);
      cb(err);
    } else {
      process.nextTick(emitCloseNT, _this);
    }
  });

  return this;
}

function emitErrorAndCloseNT(self, err) {
  emitErrorNT(self, err);
  emitCloseNT(self);
}

function emitCloseNT(self) {
  if (self._writableState && !self._writableState.emitClose) return;
  if (self._readableState && !self._readableState.emitClose) return;
  self.emit('close');
}

function undestroy() {
  if (this._readableState) {
    this._readableState.destroyed = false;
    this._readableState.reading = false;
    this._readableState.ended = false;
    this._readableState.endEmitted = false;
  }

  if (this._writableState) {
    this._writableState.destroyed = false;
    this._writableState.ended = false;
    this._writableState.ending = false;
    this._writableState.finalCalled = false;
    this._writableState.prefinished = false;
    this._writableState.finished = false;
    this._writableState.errorEmitted = false;
  }
}

function emitErrorNT(self, err) {
  self.emit('error', err);
}

function errorOrDestroy(stream, err) {
  // We have tests that rely on errors being emitted
  // in the same tick, so changing this is semver major.
  // For now when you opt-in to autoDestroy we allow
  // the error to be emitted nextTick. In a future
  // semver major update we should change the default to this.
  var rState = stream._readableState;
  var wState = stream._writableState;
  if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err);
}

module.exports = {
  destroy: destroy,
  undestroy: undestroy,
  errorOrDestroy: errorOrDestroy
};
}).call(this)}).call(this,reqqq('_process'))
},{"_process":20}],38:[function(reqqq,module,exports){
// Ported from https://github.com/mafintosh/end-of-stream with
// permission from the author, Mathias Buus (@mafintosh).
'use strict';

var ERR_STREAM_PREMATURE_CLOSE = reqqq('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;

function once(callback) {
  var called = false;
  return function () {
    if (called) return;
    called = true;

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    callback.apply(this, args);
  };
}

function noop() {}

function isRequest(stream) {
  return stream.setHeader && typeof stream.abort === 'function';
}

function eos(stream, opts, callback) {
  if (typeof opts === 'function') return eos(stream, null, opts);
  if (!opts) opts = {};
  callback = once(callback || noop);
  var readable = opts.readable || opts.readable !== false && stream.readable;
  var writable = opts.writable || opts.writable !== false && stream.writable;

  var onlegacyfinish = function onlegacyfinish() {
    if (!stream.writable) onfinish();
  };

  var writableEnded = stream._writableState && stream._writableState.finished;

  var onfinish = function onfinish() {
    writable = false;
    writableEnded = true;
    if (!readable) callback.call(stream);
  };

  var readableEnded = stream._readableState && stream._readableState.endEmitted;

  var onend = function onend() {
    readable = false;
    readableEnded = true;
    if (!writable) callback.call(stream);
  };

  var onerror = function onerror(err) {
    callback.call(stream, err);
  };

  var onclose = function onclose() {
    var err;

    if (readable && !readableEnded) {
      if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
      return callback.call(stream, err);
    }

    if (writable && !writableEnded) {
      if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
      return callback.call(stream, err);
    }
  };

  var onrequest = function onrequest() {
    stream.req.on('finish', onfinish);
  };

  if (isRequest(stream)) {
    stream.on('complete', onfinish);
    stream.on('abort', onclose);
    if (stream.req) onrequest();else stream.on('request', onrequest);
  } else if (writable && !stream._writableState) {
    // legacy streams
    stream.on('end', onlegacyfinish);
    stream.on('close', onlegacyfinish);
  }

  stream.on('end', onend);
  stream.on('finish', onfinish);
  if (opts.error !== false) stream.on('error', onerror);
  stream.on('close', onclose);
  return function () {
    stream.removeListener('complete', onfinish);
    stream.removeListener('abort', onclose);
    stream.removeListener('request', onrequest);
    if (stream.req) stream.req.removeListener('finish', onfinish);
    stream.removeListener('end', onlegacyfinish);
    stream.removeListener('close', onlegacyfinish);
    stream.removeListener('finish', onfinish);
    stream.removeListener('end', onend);
    stream.removeListener('error', onerror);
    stream.removeListener('close', onclose);
  };
}

module.exports = eos;
},{"../../../errors":29}],39:[function(reqqq,module,exports){
module.exports = function () {
  throw new Error('Readable.from is not available in the browser')
};

},{}],40:[function(reqqq,module,exports){
// Ported from https://github.com/mafintosh/pump with
// permission from the author, Mathias Buus (@mafintosh).
'use strict';

var eos;

function once(callback) {
  var called = false;
  return function () {
    if (called) return;
    called = true;
    callback.apply(void 0, arguments);
  };
}

var _reqqq$codes = reqqq('../../../errors').codes,
    ERR_MISSING_ARGS = _reqqq$codes.ERR_MISSING_ARGS,
    ERR_STREAM_DESTROYED = _reqqq$codes.ERR_STREAM_DESTROYED;

function noop(err) {
  // Rethrow the error if it exists to avoid swallowing it
  if (err) throw err;
}

function isRequest(stream) {
  return stream.setHeader && typeof stream.abort === 'function';
}

function destroyer(stream, reading, writing, callback) {
  callback = once(callback);
  var closed = false;
  stream.on('close', function () {
    closed = true;
  });
  if (eos === undefined) eos = reqqq('./end-of-stream');
  eos(stream, {
    readable: reading,
    writable: writing
  }, function (err) {
    if (err) return callback(err);
    closed = true;
    callback();
  });
  var destroyed = false;
  return function (err) {
    if (closed) return;
    if (destroyed) return;
    destroyed = true; // request.destroy just do .end - .abort is what we want

    if (isRequest(stream)) return stream.abort();
    if (typeof stream.destroy === 'function') return stream.destroy();
    callback(err || new ERR_STREAM_DESTROYED('pipe'));
  };
}

function call(fn) {
  fn();
}

function pipe(from, to) {
  return from.pipe(to);
}

function popCallback(streams) {
  if (!streams.length) return noop;
  if (typeof streams[streams.length - 1] !== 'function') return noop;
  return streams.pop();
}

function pipeline() {
  for (var _len = arguments.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {
    streams[_key] = arguments[_key];
  }

  var callback = popCallback(streams);
  if (Array.isArray(streams[0])) streams = streams[0];

  if (streams.length < 2) {
    throw new ERR_MISSING_ARGS('streams');
  }

  var error;
  var destroys = streams.map(function (stream, i) {
    var reading = i < streams.length - 1;
    var writing = i > 0;
    return destroyer(stream, reading, writing, function (err) {
      if (!error) error = err;
      if (err) destroys.forEach(call);
      if (reading) return;
      destroys.forEach(call);
      callback(error);
    });
  });
  return streams.reduce(pipe);
}

module.exports = pipeline;
},{"../../../errors":29,"./end-of-stream":38}],41:[function(reqqq,module,exports){
'use strict';

var ERR_INVALID_OPT_VALUE = reqqq('../../../errors').codes.ERR_INVALID_OPT_VALUE;

function highWaterMarkFrom(options, isDuplex, duplexKey) {
  return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
}

function getHighWaterMark(state, options, duplexKey, isDuplex) {
  var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);

  if (hwm != null) {
    if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {
      var name = isDuplex ? duplexKey : 'highWaterMark';
      throw new ERR_INVALID_OPT_VALUE(name, hwm);
    }

    return Math.floor(hwm);
  } // Default value


  return state.objectMode ? 16 : 16 * 1024;
}

module.exports = {
  getHighWaterMark: getHighWaterMark
};
},{"../../../errors":29}],42:[function(reqqq,module,exports){
module.exports = reqqq('events').EventEmitter;

},{"events":6}],43:[function(reqqq,module,exports){
(function (global){(function (){
var ClientRequest = reqqq('./lib/request')
var response = reqqq('./lib/response')
var extend = reqqq('xtend')
var statusCodes = reqqq('builtin-status-codes')
var url = reqqq('url')

var http = exports

http.request = function (opts, cb) {
	if (typeof opts === 'string')
		opts = url.parse(opts)
	else
		opts = extend(opts)

	// Normally, the page is loaded from http or https, so not specifying a protocol
	// will result in a (valid) protocol-relative url. However, this won't work if
	// the protocol is something else, like 'file:'
	var defaultProtocol = global.location.protocol.search(/^https?:$/) === -1 ? 'http:' : ''

	var protocol = opts.protocol || defaultProtocol
	var host = opts.hostname || opts.host
	var port = opts.port
	var path = opts.path || '/'

	// Necessary for IPv6 addresses
	if (host && host.indexOf(':') !== -1)
		host = '[' + host + ']'

	// This may be a relative url. The browser should always be able to interpret it correctly.
	opts.url = (host ? (protocol + '//' + host) : '') + (port ? ':' + port : '') + path
	opts.method = (opts.method || 'GET').toUpperCase()
	opts.headers = opts.headers || {}

	// Also valid opts.auth, opts.mode

	var req = new ClientRequest(opts)
	if (cb)
		req.on('response', cb)
	return req
}

http.get = function get (opts, cb) {
	var req = http.request(opts, cb)
	req.end()
	return req
}

http.ClientRequest = ClientRequest
http.IncomingMessage = response.IncomingMessage

http.Agent = function () {}
http.Agent.defaultMaxSockets = 4

http.globalAgent = new http.Agent()

http.STATUS_CODES = statusCodes

http.METHODS = [
	'CHECKOUT',
	'CONNECT',
	'COPY',
	'DELETE',
	'GET',
	'HEAD',
	'LOCK',
	'M-SEARCH',
	'MERGE',
	'MKACTIVITY',
	'MKCOL',
	'MOVE',
	'NOTIFY',
	'OPTIONS',
	'PATCH',
	'POST',
	'PROPFIND',
	'PROPPATCH',
	'PURGE',
	'PUT',
	'REPORT',
	'SEARCH',
	'SUBSCRIBE',
	'TRACE',
	'UNLOCK',
	'UNSUBSCRIBE'
]
}).call(this)}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./lib/request":45,"./lib/response":46,"builtin-status-codes":5,"url":64,"xtend":68}],44:[function(reqqq,module,exports){
(function (global){(function (){
exports.fetch = isFunction(global.fetch) && isFunction(global.ReadableStream)

exports.writableStream = isFunction(global.WritableStream)

exports.abortController = isFunction(global.AbortController)

// The xhr request to example.com may violate some restrictive CSP configurations,
// so if we're running in a browser that supports `fetch`, avoid calling getXHR()
// and assume support for certain features below.
var xhr
function getXHR () {
	// Cache the xhr value
	if (xhr !== undefined) return xhr

	if (global.XMLHttpRequest) {
		xhr = new global.XMLHttpRequest()
		// If XDomainRequest is available (ie only, where xhr might not work
		// cross domain), use the page location. Otherwise use example.com
		// Note: this doesn't actually make an http request.
		try {
			xhr.open('GET', global.XDomainRequest ? '/' : 'https://example.com')
		} catch(e) {
			xhr = null
		}
	} else {
		// Service workers don't have XHR
		xhr = null
	}
	return xhr
}

function checkTypeSupport (type) {
	var xhr = getXHR()
	if (!xhr) return false
	try {
		xhr.responseType = type
		return xhr.responseType === type
	} catch (e) {}
	return false
}

// If fetch is supported, then arraybuffer will be supported too. Skip calling
// checkTypeSupport(), since that calls getXHR().
exports.arraybuffer = exports.fetch || checkTypeSupport('arraybuffer')

// These next two tests unavoidably show warnings in Chrome. Since fetch will always
// be used if it's available, just return false for these to avoid the warnings.
exports.msstream = !exports.fetch && checkTypeSupport('ms-stream')
exports.mozchunkedarraybuffer = !exports.fetch && checkTypeSupport('moz-chunked-arraybuffer')

// If fetch is supported, then overrideMimeType will be supported too. Skip calling
// getXHR().
exports.overrideMimeType = exports.fetch || (getXHR() ? isFunction(getXHR().overrideMimeType) : false)

function isFunction (value) {
	return typeof value === 'function'
}

xhr = null // Help gc

}).call(this)}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],45:[function(reqqq,module,exports){
(function (process,global,Buffer){(function (){
var capability = reqqq('./capability')
var inherits = reqqq('inherits')
var response = reqqq('./response')
var stream = reqqq('readable-stream')

var IncomingMessage = response.IncomingMessage
var rStates = response.readyStates

function decideMode (preferBinary, useFetch) {
	if (capability.fetch && useFetch) {
		return 'fetch'
	} else if (capability.mozchunkedarraybuffer) {
		return 'moz-chunked-arraybuffer'
	} else if (capability.msstream) {
		return 'ms-stream'
	} else if (capability.arraybuffer && preferBinary) {
		return 'arraybuffer'
	} else {
		return 'text'
	}
}

var ClientRequest = module.exports = function (opts) {
	var self = this
	stream.Writable.call(self)

	self._opts = opts
	self._body = []
	self._headers = {}
	if (opts.auth)
		self.setHeader('Authorization', 'Basic ' + Buffer.from(opts.auth).toString('base64'))
	Object.keys(opts.headers).forEach(function (name) {
		self.setHeader(name, opts.headers[name])
	})

	var preferBinary
	var useFetch = true
	if (opts.mode === 'disable-fetch' || ('requestTimeout' in opts && !capability.abortController)) {
		// If the use of XHR should be preferred. Not typically needed.
		useFetch = false
		preferBinary = true
	} else if (opts.mode === 'prefer-streaming') {
		// If streaming is a high priority but binary compatibility and
		// the accuracy of the 'content-type' header aren't
		preferBinary = false
	} else if (opts.mode === 'allow-wrong-content-type') {
		// If streaming is more important than preserving the 'content-type' header
		preferBinary = !capability.overrideMimeType
	} else if (!opts.mode || opts.mode === 'default' || opts.mode === 'prefer-fast') {
		// Use binary if text streaming may corrupt data or the content-type header, or for speed
		preferBinary = true
	} else {
		throw new Error('Invalid value for opts.mode')
	}
	self._mode = decideMode(preferBinary, useFetch)
	self._fetchTimer = null
	self._socketTimeout = null
	self._socketTimer = null

	self.on('finish', function () {
		self._onFinish()
	})
}

inherits(ClientRequest, stream.Writable)

ClientRequest.prototype.setHeader = function (name, value) {
	var self = this
	var lowerName = name.toLowerCase()
	// This check is not necessary, but it prevents warnings from browsers about setting unsafe
	// headers. To be honest I'm not entirely sure hiding these warnings is a good thing, but
	// http-browserify did it, so I will too.
	if (unsafeHeaders.indexOf(lowerName) !== -1)
		return

	self._headers[lowerName] = {
		name: name,
		value: value
	}
}

ClientRequest.prototype.getHeader = function (name) {
	var header = this._headers[name.toLowerCase()]
	if (header)
		return header.value
	return null
}

ClientRequest.prototype.removeHeader = function (name) {
	var self = this
	delete self._headers[name.toLowerCase()]
}

ClientRequest.prototype._onFinish = function () {
	var self = this

	if (self._destroyed)
		return
	var opts = self._opts

	if ('timeout' in opts && opts.timeout !== 0) {
		self.setTimeout(opts.timeout)
	}

	var headersObj = self._headers
	var body = null
	if (opts.method !== 'GET' && opts.method !== 'HEAD') {
        body = new Blob(self._body, {
            type: (headersObj['content-type'] || {}).value || ''
        });
    }

	// create flattened list of headers
	var headersList = []
	Object.keys(headersObj).forEach(function (keyName) {
		var name = headersObj[keyName].name
		var value = headersObj[keyName].value
		if (Array.isArray(value)) {
			value.forEach(function (v) {
				headersList.push([name, v])
			})
		} else {
			headersList.push([name, value])
		}
	})

	if (self._mode === 'fetch') {
		var signal = null
		if (capability.abortController) {
			var controller = new AbortController()
			signal = controller.signal
			self._fetchAbortController = controller

			if ('requestTimeout' in opts && opts.requestTimeout !== 0) {
				self._fetchTimer = global.setTimeout(function () {
					self.emit('requestTimeout')
					if (self._fetchAbortController)
						self._fetchAbortController.abort()
				}, opts.requestTimeout)
			}
		}

		global.fetch(self._opts.url, {
			method: self._opts.method,
			headers: headersList,
			body: body || undefined,
			mode: 'cors',
			credentials: opts.withCredentials ? 'include' : 'same-origin',
			signal: signal
		}).then(function (response) {
			self._fetchResponse = response
			self._resetTimers(false)
			self._connect()
		}, function (reason) {
			self._resetTimers(true)
			if (!self._destroyed)
				self.emit('error', reason)
		})
	} else {
		var xhr = self._xhr = new global.XMLHttpRequest()
		try {
			xhr.open(self._opts.method, self._opts.url, true)
		} catch (err) {
			process.nextTick(function () {
				self.emit('error', err)
			})
			return
		}

		// Can't set responseType on really old browsers
		if ('responseType' in xhr)
			xhr.responseType = self._mode

		if ('withCredentials' in xhr)
			xhr.withCredentials = !!opts.withCredentials

		if (self._mode === 'text' && 'overrideMimeType' in xhr)
			xhr.overrideMimeType('text/plain; charset=x-user-defined')

		if ('requestTimeout' in opts) {
			xhr.timeout = opts.requestTimeout
			xhr.ontimeout = function () {
				self.emit('requestTimeout')
			}
		}

		headersList.forEach(function (header) {
			xhr.setRequestHeader(header[0], header[1])
		})

		self._response = null
		xhr.onreadystatechange = function () {
			switch (xhr.readyState) {
				case rStates.LOADING:
				case rStates.DONE:
					self._onXHRProgress()
					break
			}
		}
		// Necessary for streaming in Firefox, since xhr.response is ONLY defined
		// in onprogress, not in onreadystatechange with xhr.readyState = 3
		if (self._mode === 'moz-chunked-arraybuffer') {
			xhr.onprogress = function () {
				self._onXHRProgress()
			}
		}

		xhr.onerror = function () {
			if (self._destroyed)
				return
			self._resetTimers(true)
			self.emit('error', new Error('XHR error'))
		}

		try {
			xhr.send(body)
		} catch (err) {
			process.nextTick(function () {
				self.emit('error', err)
			})
			return
		}
	}
}

/**
 * Checks if xhr.status is readable and non-zero, indicating no error.
 * Even though the spec says it should be available in readyState 3,
 * accessing it throws an exception in IE8
 */
function statusValid (xhr) {
	try {
		var status = xhr.status
		return (status !== null && status !== 0)
	} catch (e) {
		return false
	}
}

ClientRequest.prototype._onXHRProgress = function () {
	var self = this

	self._resetTimers(false)

	if (!statusValid(self._xhr) || self._destroyed)
		return

	if (!self._response)
		self._connect()

	self._response._onXHRProgress(self._resetTimers.bind(self))
}

ClientRequest.prototype._connect = function () {
	var self = this

	if (self._destroyed)
		return

	self._response = new IncomingMessage(self._xhr, self._fetchResponse, self._mode, self._resetTimers.bind(self))
	self._response.on('error', function(err) {
		self.emit('error', err)
	})

	self.emit('response', self._response)
}

ClientRequest.prototype._write = function (chunk, encoding, cb) {
	var self = this

	self._body.push(chunk)
	cb()
}

ClientRequest.prototype._resetTimers = function (done) {
	var self = this

	global.clearTimeout(self._socketTimer)
	self._socketTimer = null

	if (done) {
		global.clearTimeout(self._fetchTimer)
		self._fetchTimer = null
	} else if (self._socketTimeout) {
		self._socketTimer = global.setTimeout(function () {
			self.emit('timeout')
		}, self._socketTimeout)
	}
}

ClientRequest.prototype.abort = ClientRequest.prototype.destroy = function (err) {
	var self = this
	self._destroyed = true
	self._resetTimers(true)
	if (self._response)
		self._response._destroyed = true
	if (self._xhr)
		self._xhr.abort()
	else if (self._fetchAbortController)
		self._fetchAbortController.abort()

	if (err)
		self.emit('error', err)
}

ClientRequest.prototype.end = function (data, encoding, cb) {
	var self = this
	if (typeof data === 'function') {
		cb = data
		data = undefined
	}

	stream.Writable.prototype.end.call(self, data, encoding, cb)
}

ClientRequest.prototype.setTimeout = function (timeout, cb) {
	var self = this

	if (cb)
		self.once('timeout', cb)

	self._socketTimeout = timeout
	self._resetTimers(false)
}

ClientRequest.prototype.flushHeaders = function () {}
ClientRequest.prototype.setNoDelay = function () {}
ClientRequest.prototype.setSocketKeepAlive = function () {}

// Taken from http://www.w3.org/TR/XMLHttpRequest/#the-setrequestheader%28%29-method
var unsafeHeaders = [
	'accept-charset',
	'accept-encoding',
	'access-control-request-headers',
	'access-control-request-method',
	'connection',
	'content-length',
	'cookie',
	'cookie2',
	'date',
	'dnt',
	'expect',
	'host',
	'keep-alive',
	'origin',
	'referer',
	'te',
	'trailer',
	'transfer-encoding',
	'upgrade',
	'via'
]

}).call(this)}).call(this,reqqq('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},reqqq("buffer").Buffer)
},{"./capability":44,"./response":46,"_process":20,"buffer":4,"inherits":10,"readable-stream":61}],46:[function(reqqq,module,exports){
(function (process,global,Buffer){(function (){
var capability = reqqq('./capability')
var inherits = reqqq('inherits')
var stream = reqqq('readable-stream')

var rStates = exports.readyStates = {
	UNSENT: 0,
	OPENED: 1,
	HEADERS_RECEIVED: 2,
	LOADING: 3,
	DONE: 4
}

var IncomingMessage = exports.IncomingMessage = function (xhr, response, mode, resetTimers) {
	var self = this
	stream.Readable.call(self)

	self._mode = mode
	self.headers = {}
	self.rawHeaders = []
	self.trailers = {}
	self.rawTrailers = []

	// Fake the 'close' event, but only once 'end' fires
	self.on('end', function () {
		// The nextTick is necessary to prevent the 'request' module from causing an infinite loop
		process.nextTick(function () {
			self.emit('close')
		})
	})

	if (mode === 'fetch') {
		self._fetchResponse = response

		self.url = response.url
		self.statusCode = response.status
		self.statusMessage = response.statusText
		
		response.headers.forEach(function (header, key){
			self.headers[key.toLowerCase()] = header
			self.rawHeaders.push(key, header)
		})

		if (capability.writableStream) {
			var writable = new WritableStream({
				write: function (chunk) {
					resetTimers(false)
					return new Promise(function (resolve, reject) {
						if (self._destroyed) {
							reject()
						} else if(self.push(Buffer.from(chunk))) {
							resolve()
						} else {
							self._resumeFetch = resolve
						}
					})
				},
				close: function () {
					resetTimers(true)
					if (!self._destroyed)
						self.push(null)
				},
				abort: function (err) {
					resetTimers(true)
					if (!self._destroyed)
						self.emit('error', err)
				}
			})

			try {
				response.body.pipeTo(writable).catch(function (err) {
					resetTimers(true)
					if (!self._destroyed)
						self.emit('error', err)
				})
				return
			} catch (e) {} // pipeTo method isn't defined. Can't find a better way to feature test this
		}
		// fallback for when writableStream or pipeTo aren't available
		var reader = response.body.getReader()
		function read () {
			reader.read().then(function (result) {
				if (self._destroyed)
					return
				resetTimers(result.done)
				if (result.done) {
					self.push(null)
					return
				}
				self.push(Buffer.from(result.value))
				read()
			}).catch(function (err) {
				resetTimers(true)
				if (!self._destroyed)
					self.emit('error', err)
			})
		}
		read()
	} else {
		self._xhr = xhr
		self._pos = 0

		self.url = xhr.responseURL
		self.statusCode = xhr.status
		self.statusMessage = xhr.statusText
		var headers = xhr.getAllResponseHeaders().split(/\r?\n/)
		headers.forEach(function (header) {
			var matches = header.match(/^([^:]+):\s*(.*)/)
			if (matches) {
				var key = matches[1].toLowerCase()
				if (key === 'set-cookie') {
					if (self.headers[key] === undefined) {
						self.headers[key] = []
					}
					self.headers[key].push(matches[2])
				} else if (self.headers[key] !== undefined) {
					self.headers[key] += ', ' + matches[2]
				} else {
					self.headers[key] = matches[2]
				}
				self.rawHeaders.push(matches[1], matches[2])
			}
		})

		self._charset = 'x-user-defined'
		if (!capability.overrideMimeType) {
			var mimeType = self.rawHeaders['mime-type']
			if (mimeType) {
				var charsetMatch = mimeType.match(/;\s*charset=([^;])(;|$)/)
				if (charsetMatch) {
					self._charset = charsetMatch[1].toLowerCase()
				}
			}
			if (!self._charset)
				self._charset = 'utf-8' // best guess
		}
	}
}

inherits(IncomingMessage, stream.Readable)

IncomingMessage.prototype._read = function () {
	var self = this

	var resolve = self._resumeFetch
	if (resolve) {
		self._resumeFetch = null
		resolve()
	}
}

IncomingMessage.prototype._onXHRProgress = function (resetTimers) {
	var self = this

	var xhr = self._xhr

	var response = null
	switch (self._mode) {
		case 'text':
			response = xhr.responseText
			if (response.length > self._pos) {
				var newData = response.substr(self._pos)
				if (self._charset === 'x-user-defined') {
					var buffer = Buffer.alloc(newData.length)
					for (var i = 0; i < newData.length; i++)
						buffer[i] = newData.charCodeAt(i) & 0xff

					self.push(buffer)
				} else {
					self.push(newData, self._charset)
				}
				self._pos = response.length
			}
			break
		case 'arraybuffer':
			if (xhr.readyState !== rStates.DONE || !xhr.response)
				break
			response = xhr.response
			self.push(Buffer.from(new Uint8Array(response)))
			break
		case 'moz-chunked-arraybuffer': // take whole
			response = xhr.response
			if (xhr.readyState !== rStates.LOADING || !response)
				break
			self.push(Buffer.from(new Uint8Array(response)))
			break
		case 'ms-stream':
			response = xhr.response
			if (xhr.readyState !== rStates.LOADING)
				break
			var reader = new global.MSStreamReader()
			reader.onprogress = function () {
				if (reader.result.byteLength > self._pos) {
					self.push(Buffer.from(new Uint8Array(reader.result.slice(self._pos))))
					self._pos = reader.result.byteLength
				}
			}
			reader.onload = function () {
				resetTimers(true)
				self.push(null)
			}
			// reader.onerror = ??? // TODO: this
			reader.readAsArrayBuffer(response)
			break
	}

	// The ms-stream case handles end separately in reader.onload()
	if (self._xhr.readyState === rStates.DONE && self._mode !== 'ms-stream') {
		resetTimers(true)
		self.push(null)
	}
}

}).call(this)}).call(this,reqqq('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},reqqq("buffer").Buffer)
},{"./capability":44,"_process":20,"buffer":4,"inherits":10,"readable-stream":61}],47:[function(reqqq,module,exports){
arguments[4][29][0].apply(exports,arguments)
},{"dup":29}],48:[function(reqqq,module,exports){
arguments[4][30][0].apply(exports,arguments)
},{"./_stream_readable":50,"./_stream_writable":52,"_process":20,"dup":30,"inherits":10}],49:[function(reqqq,module,exports){
arguments[4][31][0].apply(exports,arguments)
},{"./_stream_transform":51,"dup":31,"inherits":10}],50:[function(reqqq,module,exports){
arguments[4][32][0].apply(exports,arguments)
},{"../errors":47,"./_stream_duplex":48,"./internal/streams/async_iterator":53,"./internal/streams/buffer_list":54,"./internal/streams/destroy":55,"./internal/streams/from":57,"./internal/streams/state":59,"./internal/streams/stream":60,"_process":20,"buffer":4,"dup":32,"events":6,"inherits":10,"string_decoder/":62,"util":3}],51:[function(reqqq,module,exports){
arguments[4][33][0].apply(exports,arguments)
},{"../errors":47,"./_stream_duplex":48,"dup":33,"inherits":10}],52:[function(reqqq,module,exports){
arguments[4][34][0].apply(exports,arguments)
},{"../errors":47,"./_stream_duplex":48,"./internal/streams/destroy":55,"./internal/streams/state":59,"./internal/streams/stream":60,"_process":20,"buffer":4,"dup":34,"inherits":10,"util-deprecate":66}],53:[function(reqqq,module,exports){
arguments[4][35][0].apply(exports,arguments)
},{"./end-of-stream":56,"_process":20,"dup":35}],54:[function(reqqq,module,exports){
arguments[4][36][0].apply(exports,arguments)
},{"buffer":4,"dup":36,"util":3}],55:[function(reqqq,module,exports){
arguments[4][37][0].apply(exports,arguments)
},{"_process":20,"dup":37}],56:[function(reqqq,module,exports){
arguments[4][38][0].apply(exports,arguments)
},{"../../../errors":47,"dup":38}],57:[function(reqqq,module,exports){
arguments[4][39][0].apply(exports,arguments)
},{"dup":39}],58:[function(reqqq,module,exports){
arguments[4][40][0].apply(exports,arguments)
},{"../../../errors":47,"./end-of-stream":56,"dup":40}],59:[function(reqqq,module,exports){
arguments[4][41][0].apply(exports,arguments)
},{"../../../errors":47,"dup":41}],60:[function(reqqq,module,exports){
arguments[4][42][0].apply(exports,arguments)
},{"dup":42,"events":6}],61:[function(reqqq,module,exports){
exports = module.exports = reqqq('./lib/_stream_readable.js');
exports.Stream = exports;
exports.Readable = exports;
exports.Writable = reqqq('./lib/_stream_writable.js');
exports.Duplex = reqqq('./lib/_stream_duplex.js');
exports.Transform = reqqq('./lib/_stream_transform.js');
exports.PassThrough = reqqq('./lib/_stream_passthrough.js');
exports.finished = reqqq('./lib/internal/streams/end-of-stream.js');
exports.pipeline = reqqq('./lib/internal/streams/pipeline.js');

},{"./lib/_stream_duplex.js":48,"./lib/_stream_passthrough.js":49,"./lib/_stream_readable.js":50,"./lib/_stream_transform.js":51,"./lib/_stream_writable.js":52,"./lib/internal/streams/end-of-stream.js":56,"./lib/internal/streams/pipeline.js":58}],62:[function(reqqq,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

/*<replacement>*/

var Buffer = reqqq('safe-buffer').Buffer;
/*</replacement>*/

var isEncoding = Buffer.isEncoding || function (encoding) {
  encoding = '' + encoding;
  switch (encoding && encoding.toLowerCase()) {
    case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw':
      return true;
    default:
      return false;
  }
};

function _normalizeEncoding(enc) {
  if (!enc) return 'utf8';
  var retried;
  while (true) {
    switch (enc) {
      case 'utf8':
      case 'utf-8':
        return 'utf8';
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return 'utf16le';
      case 'latin1':
      case 'binary':
        return 'latin1';
      case 'base64':
      case 'ascii':
      case 'hex':
        return enc;
      default:
        if (retried) return; // undefined
        enc = ('' + enc).toLowerCase();
        retried = true;
    }
  }
};

// Do not cache `Buffer.isEncoding` when checking encoding names as some
// modules monkey-patch it to support additional encodings
function normalizeEncoding(enc) {
  var nenc = _normalizeEncoding(enc);
  if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc);
  return nenc || enc;
}

// StringDecoder provides an interface for efficiently splitting a series of
// buffers into a series of JS strings without breaking apart multi-byte
// characters.
exports.StringDecoder = StringDecoder;
function StringDecoder(encoding) {
  this.encoding = normalizeEncoding(encoding);
  var nb;
  switch (this.encoding) {
    case 'utf16le':
      this.text = utf16Text;
      this.end = utf16End;
      nb = 4;
      break;
    case 'utf8':
      this.fillLast = utf8FillLast;
      nb = 4;
      break;
    case 'base64':
      this.text = base64Text;
      this.end = base64End;
      nb = 3;
      break;
    default:
      this.write = simpleWrite;
      this.end = simpleEnd;
      return;
  }
  this.lastNeed = 0;
  this.lastTotal = 0;
  this.lastChar = Buffer.allocUnsafe(nb);
}

StringDecoder.prototype.write = function (buf) {
  if (buf.length === 0) return '';
  var r;
  var i;
  if (this.lastNeed) {
    r = this.fillLast(buf);
    if (r === undefined) return '';
    i = this.lastNeed;
    this.lastNeed = 0;
  } else {
    i = 0;
  }
  if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);
  return r || '';
};

StringDecoder.prototype.end = utf8End;

// Returns only complete characters in a Buffer
StringDecoder.prototype.text = utf8Text;

// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer
StringDecoder.prototype.fillLast = function (buf) {
  if (this.lastNeed <= buf.length) {
    buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);
    return this.lastChar.toString(this.encoding, 0, this.lastTotal);
  }
  buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);
  this.lastNeed -= buf.length;
};

// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a
// continuation byte. If an invalid byte is detected, -2 is returned.
function utf8CheckByte(byte) {
  if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4;
  return byte >> 6 === 0x02 ? -1 : -2;
}

// Checks at most 3 bytes at the end of a Buffer in order to detect an
// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)
// needed to complete the UTF-8 character (if applicable) are returned.
function utf8CheckIncomplete(self, buf, i) {
  var j = buf.length - 1;
  if (j < i) return 0;
  var nb = utf8CheckByte(buf[j]);
  if (nb >= 0) {
    if (nb > 0) self.lastNeed = nb - 1;
    return nb;
  }
  if (--j < i || nb === -2) return 0;
  nb = utf8CheckByte(buf[j]);
  if (nb >= 0) {
    if (nb > 0) self.lastNeed = nb - 2;
    return nb;
  }
  if (--j < i || nb === -2) return 0;
  nb = utf8CheckByte(buf[j]);
  if (nb >= 0) {
    if (nb > 0) {
      if (nb === 2) nb = 0;else self.lastNeed = nb - 3;
    }
    return nb;
  }
  return 0;
}

// Validates as many continuation bytes for a multi-byte UTF-8 character as
// needed or are available. If we see a non-continuation byte where we expect
// one, we "replace" the validated continuation bytes we've seen so far with
// a single UTF-8 replacement character ('\ufffd'), to match v8's UTF-8 decoding
// behavior. The continuation byte check is included three times in the case
// where all of the continuation bytes for a character exist in the same buffer.
// It is also done this way as a slight performance increase instead of using a
// loop.
function utf8CheckExtraBytes(self, buf, p) {
  if ((buf[0] & 0xC0) !== 0x80) {
    self.lastNeed = 0;
    return '\ufffd';
  }
  if (self.lastNeed > 1 && buf.length > 1) {
    if ((buf[1] & 0xC0) !== 0x80) {
      self.lastNeed = 1;
      return '\ufffd';
    }
    if (self.lastNeed > 2 && buf.length > 2) {
      if ((buf[2] & 0xC0) !== 0x80) {
        self.lastNeed = 2;
        return '\ufffd';
      }
    }
  }
}

// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.
function utf8FillLast(buf) {
  var p = this.lastTotal - this.lastNeed;
  var r = utf8CheckExtraBytes(this, buf, p);
  if (r !== undefined) return r;
  if (this.lastNeed <= buf.length) {
    buf.copy(this.lastChar, p, 0, this.lastNeed);
    return this.lastChar.toString(this.encoding, 0, this.lastTotal);
  }
  buf.copy(this.lastChar, p, 0, buf.length);
  this.lastNeed -= buf.length;
}

// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a
// partial character, the character's bytes are buffered until the reqqqd
// number of bytes are available.
function utf8Text(buf, i) {
  var total = utf8CheckIncomplete(this, buf, i);
  if (!this.lastNeed) return buf.toString('utf8', i);
  this.lastTotal = total;
  var end = buf.length - (total - this.lastNeed);
  buf.copy(this.lastChar, 0, end);
  return buf.toString('utf8', i, end);
}

// For UTF-8, a replacement character is added when ending on a partial
// character.
function utf8End(buf) {
  var r = buf && buf.length ? this.write(buf) : '';
  if (this.lastNeed) return r + '\ufffd';
  return r;
}

// UTF-16LE typically needs two bytes per character, but even if we have an even
// number of bytes available, we need to check if we end on a leading/high
// surrogate. In that case, we need to wait for the next two bytes in order to
// decode the last character properly.
function utf16Text(buf, i) {
  if ((buf.length - i) % 2 === 0) {
    var r = buf.toString('utf16le', i);
    if (r) {
      var c = r.charCodeAt(r.length - 1);
      if (c >= 0xD800 && c <= 0xDBFF) {
        this.lastNeed = 2;
        this.lastTotal = 4;
        this.lastChar[0] = buf[buf.length - 2];
        this.lastChar[1] = buf[buf.length - 1];
        return r.slice(0, -1);
      }
    }
    return r;
  }
  this.lastNeed = 1;
  this.lastTotal = 2;
  this.lastChar[0] = buf[buf.length - 1];
  return buf.toString('utf16le', i, buf.length - 1);
}

// For UTF-16LE we do not explicitly append special replacement characters if we
// end on a partial character, we simply let v8 handle that.
function utf16End(buf) {
  var r = buf && buf.length ? this.write(buf) : '';
  if (this.lastNeed) {
    var end = this.lastTotal - this.lastNeed;
    return r + this.lastChar.toString('utf16le', 0, end);
  }
  return r;
}

function base64Text(buf, i) {
  var n = (buf.length - i) % 3;
  if (n === 0) return buf.toString('base64', i);
  this.lastNeed = 3 - n;
  this.lastTotal = 3;
  if (n === 1) {
    this.lastChar[0] = buf[buf.length - 1];
  } else {
    this.lastChar[0] = buf[buf.length - 2];
    this.lastChar[1] = buf[buf.length - 1];
  }
  return buf.toString('base64', i, buf.length - n);
}

function base64End(buf) {
  var r = buf && buf.length ? this.write(buf) : '';
  if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed);
  return r;
}

// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)
function simpleWrite(buf) {
  return buf.toString(this.encoding);
}

function simpleEnd(buf) {
  return buf && buf.length ? this.write(buf) : '';
}
},{"safe-buffer":26}],63:[function(reqqq,module,exports){
(function (setImmediate,clearImmediate){(function (){
var nextTick = reqqq('process/browser.js').nextTick;
var apply = Function.prototype.apply;
var slice = Array.prototype.slice;
var immediateIds = {};
var nextImmediateId = 0;

// DOM APIs, for completeness

exports.setTimeout = function() {
  return new Timeout(apply.call(setTimeout, window, arguments), clearTimeout);
};
exports.setInterval = function() {
  return new Timeout(apply.call(setInterval, window, arguments), clearInterval);
};
exports.clearTimeout =
exports.clearInterval = function(timeout) { timeout.close(); };

function Timeout(id, clearFn) {
  this._id = id;
  this._clearFn = clearFn;
}
Timeout.prototype.unref = Timeout.prototype.ref = function() {};
Timeout.prototype.close = function() {
  this._clearFn.call(window, this._id);
};

// Does not start the time, just sets up the members needed.
exports.enroll = function(item, msecs) {
  clearTimeout(item._idleTimeoutId);
  item._idleTimeout = msecs;
};

exports.unenroll = function(item) {
  clearTimeout(item._idleTimeoutId);
  item._idleTimeout = -1;
};

exports._unrefActive = exports.active = function(item) {
  clearTimeout(item._idleTimeoutId);

  var msecs = item._idleTimeout;
  if (msecs >= 0) {
    item._idleTimeoutId = setTimeout(function onTimeout() {
      if (item._onTimeout)
        item._onTimeout();
    }, msecs);
  }
};

// That's not how node.js implements it but the exposed api is the same.
exports.setImmediate = typeof setImmediate === "function" ? setImmediate : function(fn) {
  var id = nextImmediateId++;
  var args = arguments.length < 2 ? false : slice.call(arguments, 1);

  immediateIds[id] = true;

  nextTick(function onNextTick() {
    if (immediateIds[id]) {
      // fn.call() is faster so we optimize for the common use-case
      // @see http://jsperf.com/call-apply-segu
      if (args) {
        fn.apply(null, args);
      } else {
        fn.call(null);
      }
      // Prevent ids from leaking
      exports.clearImmediate(id);
    }
  });

  return id;
};

exports.clearImmediate = typeof clearImmediate === "function" ? clearImmediate : function(id) {
  delete immediateIds[id];
};
}).call(this)}).call(this,reqqq("timers").setImmediate,reqqq("timers").clearImmediate)
},{"process/browser.js":20,"timers":63}],64:[function(reqqq,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

var punycode = reqqq('punycode');
var util = reqqq('./util');

exports.parse = urlParse;
exports.resolve = urlResolve;
exports.resolveObject = urlResolveObject;
exports.format = urlFormat;

exports.Url = Url;

function Url() {
  this.protocol = null;
  this.slashes = null;
  this.auth = null;
  this.host = null;
  this.port = null;
  this.hostname = null;
  this.hash = null;
  this.search = null;
  this.query = null;
  this.pathname = null;
  this.path = null;
  this.href = null;
}

// Reference: RFC 3986, RFC 1808, RFC 2396

// define these here so at least they only have to be
// compiled once on the first module load.
var protocolPattern = /^([a-z0-9.+-]+:)/i,
    portPattern = /:[0-9]*$/,

    // Special case for a simple path URL
    simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,

    // RFC 2396: characters reserved for delimiting URLs.
    // We actually just auto-escape these.
    delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],

    // RFC 2396: characters not allowed for various reasons.
    unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),

    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
    autoEscape = ['\''].concat(unwise),
    // Characters that are never ever allowed in a hostname.
    // Note that any invalid chars are also handled, but these
    // are the ones that are *expected* to be seen, so we fast-path
    // them.
    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
    hostEndingChars = ['/', '?', '#'],
    hostnameMaxLen = 255,
    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
    // protocols that can allow "unsafe" and "unwise" chars.
    unsafeProtocol = {
      'javascript': true,
      'javascript:': true
    },
    // protocols that never have a hostname.
    hostlessProtocol = {
      'javascript': true,
      'javascript:': true
    },
    // protocols that always contain a // bit.
    slashedProtocol = {
      'http': true,
      'https': true,
      'ftp': true,
      'gopher': true,
      'file': true,
      'http:': true,
      'https:': true,
      'ftp:': true,
      'gopher:': true,
      'file:': true
    },
    querystring = reqqq('querystring');

function urlParse(url, parseQueryString, slashesDenoteHost) {
  if (url && util.isObject(url) && url instanceof Url) return url;

  var u = new Url;
  u.parse(url, parseQueryString, slashesDenoteHost);
  return u;
}

Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
  if (!util.isString(url)) {
    throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
  }

  // Copy chrome, IE, opera backslash-handling behavior.
  // Back slashes before the query string get converted to forward slashes
  // See: https://code.google.com/p/chromium/issues/detail?id=25916
  var queryIndex = url.indexOf('?'),
      splitter =
          (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
      uSplit = url.split(splitter),
      slashRegex = /\\/g;
  uSplit[0] = uSplit[0].replace(slashRegex, '/');
  url = uSplit.join(splitter);

  var rest = url;

  // trim before proceeding.
  // This is to support parse stuff like "  http://foo.com  \n"
  rest = rest.trim();

  if (!slashesDenoteHost && url.split('#').length === 1) {
    // Try fast path regexp
    var simplePath = simplePathPattern.exec(rest);
    if (simplePath) {
      this.path = rest;
      this.href = rest;
      this.pathname = simplePath[1];
      if (simplePath[2]) {
        this.search = simplePath[2];
        if (parseQueryString) {
          this.query = querystring.parse(this.search.substr(1));
        } else {
          this.query = this.search.substr(1);
        }
      } else if (parseQueryString) {
        this.search = '';
        this.query = {};
      }
      return this;
    }
  }

  var proto = protocolPattern.exec(rest);
  if (proto) {
    proto = proto[0];
    var lowerProto = proto.toLowerCase();
    this.protocol = lowerProto;
    rest = rest.substr(proto.length);
  }

  // figure out if it's got a host
  // user@server is *always* interpreted as a hostname, and url
  // resolution will treat //foo/bar as host=foo,path=bar because that's
  // how the browser resolves relative URLs.
  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
    var slashes = rest.substr(0, 2) === '//';
    if (slashes && !(proto && hostlessProtocol[proto])) {
      rest = rest.substr(2);
      this.slashes = true;
    }
  }

  if (!hostlessProtocol[proto] &&
      (slashes || (proto && !slashedProtocol[proto]))) {

    // there's a hostname.
    // the first instance of /, ?, ;, or # ends the host.
    //
    // If there is an @ in the hostname, then non-host chars *are* allowed
    // to the left of the last @ sign, unless some host-ending character
    // comes *before* the @-sign.
    // URLs are obnoxious.
    //
    // ex:
    // http://a@b@c/ => user:a@b host:c
    // http://a@b?@c => user:a host:c path:/?@c

    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
    // Review our test case against browsers more comprehensively.

    // find the first instance of any hostEndingChars
    var hostEnd = -1;
    for (var i = 0; i < hostEndingChars.length; i++) {
      var hec = rest.indexOf(hostEndingChars[i]);
      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
        hostEnd = hec;
    }

    // at this point, either we have an explicit point where the
    // auth portion cannot go past, or the last @ char is the decider.
    var auth, atSign;
    if (hostEnd === -1) {
      // atSign can be anywhere.
      atSign = rest.lastIndexOf('@');
    } else {
      // atSign must be in auth portion.
      // http://a@b/c@d => host:b auth:a path:/c@d
      atSign = rest.lastIndexOf('@', hostEnd);
    }

    // Now we have a portion which is definitely the auth.
    // Pull that off.
    if (atSign !== -1) {
      auth = rest.slice(0, atSign);
      rest = rest.slice(atSign + 1);
      this.auth = decodeURIComponent(auth);
    }

    // the host is the remaining to the left of the first non-host char
    hostEnd = -1;
    for (var i = 0; i < nonHostChars.length; i++) {
      var hec = rest.indexOf(nonHostChars[i]);
      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
        hostEnd = hec;
    }
    // if we still have not hit it, then the entire thing is a host.
    if (hostEnd === -1)
      hostEnd = rest.length;

    this.host = rest.slice(0, hostEnd);
    rest = rest.slice(hostEnd);

    // pull out port.
    this.parseHost();

    // we've indicated that there is a hostname,
    // so even if it's empty, it has to be present.
    this.hostname = this.hostname || '';

    // if hostname begins with [ and ends with ]
    // assume that it's an IPv6 address.
    var ipv6Hostname = this.hostname[0] === '[' &&
        this.hostname[this.hostname.length - 1] === ']';

    // validate a little.
    if (!ipv6Hostname) {
      var hostparts = this.hostname.split(/\./);
      for (var i = 0, l = hostparts.length; i < l; i++) {
        var part = hostparts[i];
        if (!part) continue;
        if (!part.match(hostnamePartPattern)) {
          var newpart = '';
          for (var j = 0, k = part.length; j < k; j++) {
            if (part.charCodeAt(j) > 127) {
              // we replace non-ASCII char with a temporary placeholder
              // we need this to make sure size of hostname is not
              // broken by replacing non-ASCII by nothing
              newpart += 'x';
            } else {
              newpart += part[j];
            }
          }
          // we test again with ASCII char only
          if (!newpart.match(hostnamePartPattern)) {
            var validParts = hostparts.slice(0, i);
            var notHost = hostparts.slice(i + 1);
            var bit = part.match(hostnamePartStart);
            if (bit) {
              validParts.push(bit[1]);
              notHost.unshift(bit[2]);
            }
            if (notHost.length) {
              rest = '/' + notHost.join('.') + rest;
            }
            this.hostname = validParts.join('.');
            break;
          }
        }
      }
    }

    if (this.hostname.length > hostnameMaxLen) {
      this.hostname = '';
    } else {
      // hostnames are always lower case.
      this.hostname = this.hostname.toLowerCase();
    }

    if (!ipv6Hostname) {
      // IDNA Support: Returns a punycoded representation of "domain".
      // It only converts parts of the domain name that
      // have non-ASCII characters, i.e. it doesn't matter if
      // you call it with a domain that already is ASCII-only.
      this.hostname = punycode.toASCII(this.hostname);
    }

    var p = this.port ? ':' + this.port : '';
    var h = this.hostname || '';
    this.host = h + p;
    this.href += this.host;

    // strip [ and ] from the hostname
    // the host field still retains them, though
    if (ipv6Hostname) {
      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
      if (rest[0] !== '/') {
        rest = '/' + rest;
      }
    }
  }

  // now rest is set to the post-host stuff.
  // chop off any delim chars.
  if (!unsafeProtocol[lowerProto]) {

    // First, make 100% sure that any "autoEscape" chars get
    // escaped, even if encodeURIComponent doesn't think they
    // need to be.
    for (var i = 0, l = autoEscape.length; i < l; i++) {
      var ae = autoEscape[i];
      if (rest.indexOf(ae) === -1)
        continue;
      var esc = encodeURIComponent(ae);
      if (esc === ae) {
        esc = escape(ae);
      }
      rest = rest.split(ae).join(esc);
    }
  }


  // chop off from the tail first.
  var hash = rest.indexOf('#');
  if (hash !== -1) {
    // got a fragment string.
    this.hash = rest.substr(hash);
    rest = rest.slice(0, hash);
  }
  var qm = rest.indexOf('?');
  if (qm !== -1) {
    this.search = rest.substr(qm);
    this.query = rest.substr(qm + 1);
    if (parseQueryString) {
      this.query = querystring.parse(this.query);
    }
    rest = rest.slice(0, qm);
  } else if (parseQueryString) {
    // no query string, but parseQueryString still requested
    this.search = '';
    this.query = {};
  }
  if (rest) this.pathname = rest;
  if (slashedProtocol[lowerProto] &&
      this.hostname && !this.pathname) {
    this.pathname = '/';
  }

  //to support http.request
  if (this.pathname || this.search) {
    var p = this.pathname || '';
    var s = this.search || '';
    this.path = p + s;
  }

  // finally, reconstruct the href based on what has been validated.
  this.href = this.format();
  return this;
};

// format a parsed object into a url string
function urlFormat(obj) {
  // ensure it's an object, and not a string url.
  // If it's an obj, this is a no-op.
  // this way, you can call url_format() on strings
  // to clean up potentially wonky urls.
  if (util.isString(obj)) obj = urlParse(obj);
  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
  return obj.format();
}

Url.prototype.format = function() {
  var auth = this.auth || '';
  if (auth) {
    auth = encodeURIComponent(auth);
    auth = auth.replace(/%3A/i, ':');
    auth += '@';
  }

  var protocol = this.protocol || '',
      pathname = this.pathname || '',
      hash = this.hash || '',
      host = false,
      query = '';

  if (this.host) {
    host = auth + this.host;
  } else if (this.hostname) {
    host = auth + (this.hostname.indexOf(':') === -1 ?
        this.hostname :
        '[' + this.hostname + ']');
    if (this.port) {
      host += ':' + this.port;
    }
  }

  if (this.query &&
      util.isObject(this.query) &&
      Object.keys(this.query).length) {
    query = querystring.stringify(this.query);
  }

  var search = this.search || (query && ('?' + query)) || '';

  if (protocol && protocol.substr(-1) !== ':') protocol += ':';

  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
  // unless they had them to begin with.
  if (this.slashes ||
      (!protocol || slashedProtocol[protocol]) && host !== false) {
    host = '//' + (host || '');
    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
  } else if (!host) {
    host = '';
  }

  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
  if (search && search.charAt(0) !== '?') search = '?' + search;

  pathname = pathname.replace(/[?#]/g, function(match) {
    return encodeURIComponent(match);
  });
  search = search.replace('#', '%23');

  return protocol + host + pathname + search + hash;
};

function urlResolve(source, relative) {
  return urlParse(source, false, true).resolve(relative);
}

Url.prototype.resolve = function(relative) {
  return this.resolveObject(urlParse(relative, false, true)).format();
};

function urlResolveObject(source, relative) {
  if (!source) return relative;
  return urlParse(source, false, true).resolveObject(relative);
}

Url.prototype.resolveObject = function(relative) {
  if (util.isString(relative)) {
    var rel = new Url();
    rel.parse(relative, false, true);
    relative = rel;
  }

  var result = new Url();
  var tkeys = Object.keys(this);
  for (var tk = 0; tk < tkeys.length; tk++) {
    var tkey = tkeys[tk];
    result[tkey] = this[tkey];
  }

  // hash is always overridden, no matter what.
  // even href="" will remove it.
  result.hash = relative.hash;

  // if the relative url is empty, then there's nothing left to do here.
  if (relative.href === '') {
    result.href = result.format();
    return result;
  }

  // hrefs like //foo/bar always cut to the protocol.
  if (relative.slashes && !relative.protocol) {
    // take everything except the protocol from relative
    var rkeys = Object.keys(relative);
    for (var rk = 0; rk < rkeys.length; rk++) {
      var rkey = rkeys[rk];
      if (rkey !== 'protocol')
        result[rkey] = relative[rkey];
    }

    //urlParse appends trailing / to urls like http://www.example.com
    if (slashedProtocol[result.protocol] &&
        result.hostname && !result.pathname) {
      result.path = result.pathname = '/';
    }

    result.href = result.format();
    return result;
  }

  if (relative.protocol && relative.protocol !== result.protocol) {
    // if it's a known url protocol, then changing
    // the protocol does weird things
    // first, if it's not file:, then we MUST have a host,
    // and if there was a path
    // to begin with, then we MUST have a path.
    // if it is file:, then the host is dropped,
    // because that's known to be hostless.
    // anything else is assumed to be absolute.
    if (!slashedProtocol[relative.protocol]) {
      var keys = Object.keys(relative);
      for (var v = 0; v < keys.length; v++) {
        var k = keys[v];
        result[k] = relative[k];
      }
      result.href = result.format();
      return result;
    }

    result.protocol = relative.protocol;
    if (!relative.host && !hostlessProtocol[relative.protocol]) {
      var relPath = (relative.pathname || '').split('/');
      while (relPath.length && !(relative.host = relPath.shift()));
      if (!relative.host) relative.host = '';
      if (!relative.hostname) relative.hostname = '';
      if (relPath[0] !== '') relPath.unshift('');
      if (relPath.length < 2) relPath.unshift('');
      result.pathname = relPath.join('/');
    } else {
      result.pathname = relative.pathname;
    }
    result.search = relative.search;
    result.query = relative.query;
    result.host = relative.host || '';
    result.auth = relative.auth;
    result.hostname = relative.hostname || relative.host;
    result.port = relative.port;
    // to support http.request
    if (result.pathname || result.search) {
      var p = result.pathname || '';
      var s = result.search || '';
      result.path = p + s;
    }
    result.slashes = result.slashes || relative.slashes;
    result.href = result.format();
    return result;
  }

  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
      isRelAbs = (
          relative.host ||
          relative.pathname && relative.pathname.charAt(0) === '/'
      ),
      mustEndAbs = (isRelAbs || isSourceAbs ||
                    (result.host && relative.pathname)),
      removeAllDots = mustEndAbs,
      srcPath = result.pathname && result.pathname.split('/') || [],
      relPath = relative.pathname && relative.pathname.split('/') || [],
      psychotic = result.protocol && !slashedProtocol[result.protocol];

  // if the url is a non-slashed url, then relative
  // links like ../.. should be able
  // to crawl up to the hostname, as well.  This is strange.
  // result.protocol has already been set by now.
  // Later on, put the first path part into the host field.
  if (psychotic) {
    result.hostname = '';
    result.port = null;
    if (result.host) {
      if (srcPath[0] === '') srcPath[0] = result.host;
      else srcPath.unshift(result.host);
    }
    result.host = '';
    if (relative.protocol) {
      relative.hostname = null;
      relative.port = null;
      if (relative.host) {
        if (relPath[0] === '') relPath[0] = relative.host;
        else relPath.unshift(relative.host);
      }
      relative.host = null;
    }
    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
  }

  if (isRelAbs) {
    // it's absolute.
    result.host = (relative.host || relative.host === '') ?
                  relative.host : result.host;
    result.hostname = (relative.hostname || relative.hostname === '') ?
                      relative.hostname : result.hostname;
    result.search = relative.search;
    result.query = relative.query;
    srcPath = relPath;
    // fall through to the dot-handling below.
  } else if (relPath.length) {
    // it's relative
    // throw away the existing file, and take the new path instead.
    if (!srcPath) srcPath = [];
    srcPath.pop();
    srcPath = srcPath.concat(relPath);
    result.search = relative.search;
    result.query = relative.query;
  } else if (!util.isNullOrUndefined(relative.search)) {
    // just pull out the search.
    // like href='?foo'.
    // Put this after the other two cases because it simplifies the booleans
    if (psychotic) {
      result.hostname = result.host = srcPath.shift();
      //occationaly the auth can get stuck only in host
      //this especially happens in cases like
      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
      var authInHost = result.host && result.host.indexOf('@') > 0 ?
                       result.host.split('@') : false;
      if (authInHost) {
        result.auth = authInHost.shift();
        result.host = result.hostname = authInHost.shift();
      }
    }
    result.search = relative.search;
    result.query = relative.query;
    //to support http.request
    if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
      result.path = (result.pathname ? result.pathname : '') +
                    (result.search ? result.search : '');
    }
    result.href = result.format();
    return result;
  }

  if (!srcPath.length) {
    // no path at all.  easy.
    // we've already handled the other stuff above.
    result.pathname = null;
    //to support http.request
    if (result.search) {
      result.path = '/' + result.search;
    } else {
      result.path = null;
    }
    result.href = result.format();
    return result;
  }

  // if a url ENDs in . or .., then it must get a trailing slash.
  // however, if it ends in anything else non-slashy,
  // then it must NOT get a trailing slash.
  var last = srcPath.slice(-1)[0];
  var hasTrailingSlash = (
      (result.host || relative.host || srcPath.length > 1) &&
      (last === '.' || last === '..') || last === '');

  // strip single dots, resolve double dots to parent dir
  // if the path tries to go above the root, `up` ends up > 0
  var up = 0;
  for (var i = srcPath.length; i >= 0; i--) {
    last = srcPath[i];
    if (last === '.') {
      srcPath.splice(i, 1);
    } else if (last === '..') {
      srcPath.splice(i, 1);
      up++;
    } else if (up) {
      srcPath.splice(i, 1);
      up--;
    }
  }

  // if the path is allowed to go above the root, restore leading ..s
  if (!mustEndAbs && !removeAllDots) {
    for (; up--; up) {
      srcPath.unshift('..');
    }
  }

  if (mustEndAbs && srcPath[0] !== '' &&
      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
    srcPath.unshift('');
  }

  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
    srcPath.push('');
  }

  var isAbsolute = srcPath[0] === '' ||
      (srcPath[0] && srcPath[0].charAt(0) === '/');

  // put the host back
  if (psychotic) {
    result.hostname = result.host = isAbsolute ? '' :
                                    srcPath.length ? srcPath.shift() : '';
    //occationaly the auth can get stuck only in host
    //this especially happens in cases like
    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
    var authInHost = result.host && result.host.indexOf('@') > 0 ?
                     result.host.split('@') : false;
    if (authInHost) {
      result.auth = authInHost.shift();
      result.host = result.hostname = authInHost.shift();
    }
  }

  mustEndAbs = mustEndAbs || (result.host && srcPath.length);

  if (mustEndAbs && !isAbsolute) {
    srcPath.unshift('');
  }

  if (!srcPath.length) {
    result.pathname = null;
    result.path = null;
  } else {
    result.pathname = srcPath.join('/');
  }

  //to support request.http
  if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
    result.path = (result.pathname ? result.pathname : '') +
                  (result.search ? result.search : '');
  }
  result.auth = relative.auth || result.auth;
  result.slashes = result.slashes || relative.slashes;
  result.href = result.format();
  return result;
};

Url.prototype.parseHost = function() {
  var host = this.host;
  var port = portPattern.exec(host);
  if (port) {
    port = port[0];
    if (port !== ':') {
      this.port = port.substr(1);
    }
    host = host.substr(0, host.length - port.length);
  }
  if (host) this.hostname = host;
};

},{"./util":65,"punycode":22,"querystring":25}],65:[function(reqqq,module,exports){
'use strict';

module.exports = {
  isString: function(arg) {
    return typeof(arg) === 'string';
  },
  isObject: function(arg) {
    return typeof(arg) === 'object' && arg !== null;
  },
  isNull: function(arg) {
    return arg === null;
  },
  isNullOrUndefined: function(arg) {
    return arg == null;
  }
};

},{}],66:[function(reqqq,module,exports){
(function (global){(function (){

/**
 * Module exports.
 */

module.exports = deprecate;

/**
 * Mark that a method should not be used.
 * Returns a modified function which warns once by default.
 *
 * If `localStorage.noDeprecation = true` is set, then it is a no-op.
 *
 * If `localStorage.throwDeprecation = true` is set, then deprecated functions
 * will throw an Error when invoked.
 *
 * If `localStorage.traceDeprecation = true` is set, then deprecated functions
 * will invoke `console.trace()` instead of `console.error()`.
 *
 * @param {Function} fn - the function to deprecate
 * @param {String} msg - the string to print to the console when `fn` is invoked
 * @returns {Function} a new "deprecated" version of `fn`
 * @api public
 */

function deprecate (fn, msg) {
  if (config('noDeprecation')) {
    return fn;
  }

  var warned = false;
  function deprecated() {
    if (!warned) {
      if (config('throwDeprecation')) {
        throw new Error(msg);
      } else if (config('traceDeprecation')) {
        console.trace(msg);
      } else {
        console.warn(msg);
      }
      warned = true;
    }
    return fn.apply(this, arguments);
  }

  return deprecated;
}

/**
 * Checks `localStorage` for boolean values for the given `name`.
 *
 * @param {String} name
 * @returns {Boolean}
 * @api private
 */

function config (name) {
  // accessing global.localStorage can trigger a DOMException in sandboxed iframes
  try {
    if (!global.localStorage) return false;
  } catch (_) {
    return false;
  }
  var val = global.localStorage[name];
  if (null == val) return false;
  return String(val).toLowerCase() === 'true';
}

}).call(this)}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],67:[function(reqqq,module,exports){
var indexOf = function (xs, item) {
    if (xs.indexOf) return xs.indexOf(item);
    else for (var i = 0; i < xs.length; i++) {
        if (xs[i] === item) return i;
    }
    return -1;
};
var Object_keys = function (obj) {
    if (Object.keys) return Object.keys(obj)
    else {
        var res = [];
        for (var key in obj) res.push(key)
        return res;
    }
};

var forEach = function (xs, fn) {
    if (xs.forEach) return xs.forEach(fn)
    else for (var i = 0; i < xs.length; i++) {
        fn(xs[i], i, xs);
    }
};

var defineProp = (function() {
    try {
        Object.defineProperty({}, '_', {});
        return function(obj, name, value) {
            Object.defineProperty(obj, name, {
                writable: true,
                enumerable: false,
                configurable: true,
                value: value
            })
        };
    } catch(e) {
        return function(obj, name, value) {
            obj[name] = value;
        };
    }
}());

var globals = ['Array', 'Boolean', 'Date', 'Error', 'EvalError', 'Function',
'Infinity', 'JSON', 'Math', 'NaN', 'Number', 'Object', 'RangeError',
'ReferenceError', 'RegExp', 'String', 'SyntaxError', 'TypeError', 'URIError',
'decodeURI', 'decodeURIComponent', 'encodeURI', 'encodeURIComponent', 'escape',
'eval', 'isFinite', 'isNaN', 'parseFloat', 'parseInt', 'undefined', 'unescape'];

function Context() {}
Context.prototype = {};

var Script = exports.Script = function NodeScript (code) {
    if (!(this instanceof Script)) return new Script(code);
    this.code = code;
};

Script.prototype.runInContext = function (context) {
    if (!(context instanceof Context)) {
        throw new TypeError("needs a 'context' argument.");
    }
    
    var iframe = document.createElement('iframe');
    if (!iframe.style) iframe.style = {};
    iframe.style.display = 'none';
    
    document.body.appendChild(iframe);
    
    var win = iframe.contentWindow;
    var wEval = win.eval, wExecScript = win.execScript;

    if (!wEval && wExecScript) {
        // win.eval() magically appears when this is called in IE:
        wExecScript.call(win, 'null');
        wEval = win.eval;
    }
    
    forEach(Object_keys(context), function (key) {
        win[key] = context[key];
    });
    forEach(globals, function (key) {
        if (context[key]) {
            win[key] = context[key];
        }
    });
    
    var winKeys = Object_keys(win);

    var res = wEval.call(win, this.code);
    
    forEach(Object_keys(win), function (key) {
        // Avoid copying circular objects like `top` and `window` by only
        // updating existing context properties or new properties in the `win`
        // that was only introduced after the eval.
        if (key in context || indexOf(winKeys, key) === -1) {
            context[key] = win[key];
        }
    });

    forEach(globals, function (key) {
        if (!(key in context)) {
            defineProp(context, key, win[key]);
        }
    });
    
    document.body.removeChild(iframe);
    
    return res;
};

Script.prototype.runInThisContext = function () {
    return eval(this.code); // maybe...
};

Script.prototype.runInNewContext = function (context) {
    var ctx = Script.createContext(context);
    var res = this.runInContext(ctx);

    if (context) {
        forEach(Object_keys(ctx), function (key) {
            context[key] = ctx[key];
        });
    }

    return res;
};

forEach(Object_keys(Script.prototype), function (name) {
    exports[name] = Script[name] = function (code) {
        var s = Script(code);
        return s[name].apply(s, [].slice.call(arguments, 1));
    };
});

exports.isContext = function (context) {
    return context instanceof Context;
};

exports.createScript = function (code) {
    return exports.Script(code);
};

exports.createContext = Script.createContext = function (context) {
    var copy = new Context();
    if(typeof context === 'object') {
        forEach(Object_keys(context), function (key) {
            copy[key] = context[key];
        });
    }
    return copy;
};

},{}],68:[function(reqqq,module,exports){
module.exports = extend

var hasOwnProperty = Object.prototype.hasOwnProperty;

function extend() {
    var target = {}

    for (var i = 0; i < arguments.length; i++) {
        var source = arguments[i]

        for (var key in source) {
            if (hasOwnProperty.call(source, key)) {
                target[key] = source[key]
            }
        }
    }

    return target
}

},{}],69:[function(reqqq,module,exports){
const { setTimeout } = reqqq('timers');

// A cache that expires.
module.exports = class Cache extends Map {
  constructor(timeout = 1000) {
    super();
    this.timeout = timeout;
  }
  set(key, value) {
    if (this.has(key)) {
      clearTimeout(super.get(key).tid);
    }
    super.set(key, {
      tid: setTimeout(this.delete.bind(this, key), this.timeout).unref(),
      value,
    });
  }
  get(key) {
    let entry = super.get(key);
    if (entry) {
      return entry.value;
    }
    return null;
  }
  getOrSet(key, fn) {
    if (this.has(key)) {
      return this.get(key);
    } else {
      let value = fn();
      this.set(key, value);
      (async() => {
        try {
          await value;
        } catch (err) {
          this.delete(key);
        }
      })();
      return value;
    }
  }
  delete(key) {
    let entry = super.get(key);
    if (entry) {
      clearTimeout(entry.tid);
      super.delete(key);
    }
  }
  clear() {
    for (let entry of this.values()) {
      clearTimeout(entry.tid);
    }
    super.clear();
  }
};

},{"timers":63}],70:[function(reqqq,module,exports){
const utils = reqqq('./utils');
const FORMATS = reqqq('./formats');


// Use these to help sort formats, higher index is better.
const audioEncodingRanks = [
  'mp4a',
  'mp3',
  'vorbis',
  'aac',
  'opus',
  'flac',
];
const videoEncodingRanks = [
  'mp4v',
  'avc1',
  'Sorenson H.283',
  'MPEG-4 Visual',
  'VP8',
  'VP9',
  'H.264',
];

const getVideoBitrate = format => format.bitrate || 0;
const getVideoEncodingRank = format =>
  videoEncodingRanks.findIndex(enc => format.codecs && format.codecs.includes(enc));
const getAudioBitrate = format => format.audioBitrate || 0;
const getAudioEncodingRank = format =>
  audioEncodingRanks.findIndex(enc => format.codecs && format.codecs.includes(enc));


/**
 * Sort formats by a list of functions.
 *
 * @param {Object} a
 * @param {Object} b
 * @param {Array.<Function>} sortBy
 * @returns {number}
 */
const sortFormatsBy = (a, b, sortBy) => {
  let res = 0;
  for (let fn of sortBy) {
    res = fn(b) - fn(a);
    if (res !== 0) {
      break;
    }
  }
  return res;
};


const sortFormatsByVideo = (a, b) => sortFormatsBy(a, b, [
  format => parseInt(format.qualityLabel),
  getVideoBitrate,
  getVideoEncodingRank,
]);


const sortFormatsByAudio = (a, b) => sortFormatsBy(a, b, [
  getAudioBitrate,
  getAudioEncodingRank,
]);


/**
 * Sort formats from highest quality to lowest.
 *
 * @param {Object} a
 * @param {Object} b
 * @returns {number}
 */
exports.sortFormats = (a, b) => sortFormatsBy(a, b, [
  // Formats with both video and audio are ranked highest.
  format => +!!format.isHLS,
  format => +!!format.isDashMPD,
  format => +(format.contentLength > 0),
  format => +(format.hasVideo && format.hasAudio),
  format => +format.hasVideo,
  format => parseInt(format.qualityLabel) || 0,
  getVideoBitrate,
  getAudioBitrate,
  getVideoEncodingRank,
  getAudioEncodingRank,
]);


/**
 * Choose a format depending on the given options.
 *
 * @param {Array.<Object>} formats
 * @param {Object} options
 * @returns {Object}
 * @throws {Error} when no format matches the filter/format rules
 */
exports.chooseFormat = (formats, options) => {
  if (typeof options.format === 'object') {
    if (!options.format.url) {
      throw Error('Invalid format given, did you use `ytdl.getInfo()`?');
    }
    return options.format;
  }

  if (options.filter) {
    formats = exports.filterFormats(formats, options.filter);
  }

  // We currently only support HLS-Formats for livestreams
  // So we (now) remove all non-HLS streams
  if (formats.some(fmt => fmt.isHLS)) {
    formats = formats.filter(fmt => fmt.isHLS || !fmt.isLive);
  }

  let format;
  const quality = options.quality || 'highest';
  switch (quality) {
    case 'highest':
      format = formats[0];
      break;

    case 'lowest':
      format = formats[formats.length - 1];
      break;

    case 'highestaudio': {
      formats = exports.filterFormats(formats, 'audio');
      formats.sort(sortFormatsByAudio);
      // Filter for only the best audio format
      const bestAudioFormat = formats[0];
      formats = formats.filter(f => sortFormatsByAudio(bestAudioFormat, f) === 0);
      // Check for the worst video quality for the best audio quality and pick according
      // This does not loose default sorting of video encoding and bitrate
      const worstVideoQuality = formats.map(f => parseInt(f.qualityLabel) || 0).sort((a, b) => a - b)[0];
      format = formats.find(f => (parseInt(f.qualityLabel) || 0) === worstVideoQuality);
      break;
    }

    case 'lowestaudio':
      formats = exports.filterFormats(formats, 'audio');
      formats.sort(sortFormatsByAudio);
      format = formats[formats.length - 1];
      break;

    case 'highestvideo': {
      formats = exports.filterFormats(formats, 'video');
      formats.sort(sortFormatsByVideo);
      // Filter for only the best video format
      const bestVideoFormat = formats[0];
      formats = formats.filter(f => sortFormatsByVideo(bestVideoFormat, f) === 0);
      // Check for the worst audio quality for the best video quality and pick according
      // This does not loose default sorting of audio encoding and bitrate
      const worstAudioQuality = formats.map(f => f.audioBitrate || 0).sort((a, b) => a - b)[0];
      format = formats.find(f => (f.audioBitrate || 0) === worstAudioQuality);
      break;
    }

    case 'lowestvideo':
      formats = exports.filterFormats(formats, 'video');
      formats.sort(sortFormatsByVideo);
      format = formats[formats.length - 1];
      break;

    default:
      format = getFormatByQuality(quality, formats);
      break;
  }

  if (!format) {
    throw Error(`No such format found: ${quality}`);
  }
  return format;
};

/**
 * Gets a format based on quality or array of quality's
 *
 * @param {string|[string]} quality
 * @param {[Object]} formats
 * @returns {Object}
 */
const getFormatByQuality = (quality, formats) => {
  let getFormat = itag => formats.find(format => `${format.itag}` === `${itag}`);
  if (Array.isArray(quality)) {
    return getFormat(quality.find(q => getFormat(q)));
  } else {
    return getFormat(quality);
  }
};


/**
 * @param {Array.<Object>} formats
 * @param {Function} filter
 * @returns {Array.<Object>}
 */
exports.filterFormats = (formats, filter) => {
  let fn;
  switch (filter) {
    case 'videoandaudio':
    case 'audioandvideo':
      fn = format => format.hasVideo && format.hasAudio;
      break;

    case 'video':
      fn = format => format.hasVideo;
      break;

    case 'videoonly':
      fn = format => format.hasVideo && !format.hasAudio;
      break;

    case 'audio':
      fn = format => format.hasAudio;
      break;

    case 'audioonly':
      fn = format => !format.hasVideo && format.hasAudio;
      break;

    default:
      if (typeof filter === 'function') {
        fn = filter;
      } else {
        throw TypeError(`Given filter (${filter}) is not supported`);
      }
  }
  return formats.filter(format => !!format.url && fn(format));
};


/**
 * @param {Object} format
 * @returns {Object}
 */
exports.addFormatMeta = format => {
  format = Object.assign({}, FORMATS[format.itag], format);
  format.hasVideo = !!format.qualityLabel;
  format.hasAudio = !!format.audioBitrate;
  format.container = format.mimeType ?
    format.mimeType.split(';')[0].split('/')[1] : null;
  format.codecs = format.mimeType ?
    utils.between(format.mimeType, 'codecs="', '"') : null;
  format.videoCodec = format.hasVideo && format.codecs ?
    format.codecs.split(', ')[0] : null;
  format.audioCodec = format.hasAudio && format.codecs ?
    format.codecs.split(', ').slice(-1)[0] : null;
  format.isLive = /\bsource[/=]yt_live_broadcast\b/.test(format.url);
  format.isHLS = /\/manifest\/hls_(variant|playlist)\//.test(format.url);
  format.isDashMPD = /\/manifest\/dash\//.test(format.url);
  return format;
};

},{"./formats":71,"./utils":77}],71:[function(reqqq,module,exports){
/**
 * http://en.wikipedia.org/wiki/YouTube#Quality_and_formats
 */
module.exports = {

  5: {
    mimeType: 'video/flv; codecs="Sorenson H.283, mp3"',
    qualityLabel: '240p',
    bitrate: 250000,
    audioBitrate: 64,
  },

  6: {
    mimeType: 'video/flv; codecs="Sorenson H.263, mp3"',
    qualityLabel: '270p',
    bitrate: 800000,
    audioBitrate: 64,
  },

  13: {
    mimeType: 'video/3gp; codecs="MPEG-4 Visual, aac"',
    qualityLabel: null,
    bitrate: 500000,
    audioBitrate: null,
  },

  17: {
    mimeType: 'video/3gp; codecs="MPEG-4 Visual, aac"',
    qualityLabel: '144p',
    bitrate: 50000,
    audioBitrate: 24,
  },

  18: {
    mimeType: 'video/mp4; codecs="H.264, aac"',
    qualityLabel: '360p',
    bitrate: 500000,
    audioBitrate: 96,
  },

  22: {
    mimeType: 'video/mp4; codecs="H.264, aac"',
    qualityLabel: '720p',
    bitrate: 2000000,
    audioBitrate: 192,
  },

  34: {
    mimeType: 'video/flv; codecs="H.264, aac"',
    qualityLabel: '360p',
    bitrate: 500000,
    audioBitrate: 128,
  },

  35: {
    mimeType: 'video/flv; codecs="H.264, aac"',
    qualityLabel: '480p',
    bitrate: 800000,
    audioBitrate: 128,
  },

  36: {
    mimeType: 'video/3gp; codecs="MPEG-4 Visual, aac"',
    qualityLabel: '240p',
    bitrate: 175000,
    audioBitrate: 32,
  },

  37: {
    mimeType: 'video/mp4; codecs="H.264, aac"',
    qualityLabel: '1080p',
    bitrate: 3000000,
    audioBitrate: 192,
  },

  38: {
    mimeType: 'video/mp4; codecs="H.264, aac"',
    qualityLabel: '3072p',
    bitrate: 3500000,
    audioBitrate: 192,
  },

  43: {
    mimeType: 'video/webm; codecs="VP8, vorbis"',
    qualityLabel: '360p',
    bitrate: 500000,
    audioBitrate: 128,
  },

  44: {
    mimeType: 'video/webm; codecs="VP8, vorbis"',
    qualityLabel: '480p',
    bitrate: 1000000,
    audioBitrate: 128,
  },

  45: {
    mimeType: 'video/webm; codecs="VP8, vorbis"',
    qualityLabel: '720p',
    bitrate: 2000000,
    audioBitrate: 192,
  },

  46: {
    mimeType: 'audio/webm; codecs="vp8, vorbis"',
    qualityLabel: '1080p',
    bitrate: null,
    audioBitrate: 192,
  },

  82: {
    mimeType: 'video/mp4; codecs="H.264, aac"',
    qualityLabel: '360p',
    bitrate: 500000,
    audioBitrate: 96,
  },

  83: {
    mimeType: 'video/mp4; codecs="H.264, aac"',
    qualityLabel: '240p',
    bitrate: 500000,
    audioBitrate: 96,
  },

  84: {
    mimeType: 'video/mp4; codecs="H.264, aac"',
    qualityLabel: '720p',
    bitrate: 2000000,
    audioBitrate: 192,
  },

  85: {
    mimeType: 'video/mp4; codecs="H.264, aac"',
    qualityLabel: '1080p',
    bitrate: 3000000,
    audioBitrate: 192,
  },

  91: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '144p',
    bitrate: 100000,
    audioBitrate: 48,
  },

  92: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '240p',
    bitrate: 150000,
    audioBitrate: 48,
  },

  93: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '360p',
    bitrate: 500000,
    audioBitrate: 128,
  },

  94: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '480p',
    bitrate: 800000,
    audioBitrate: 128,
  },

  95: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '720p',
    bitrate: 1500000,
    audioBitrate: 256,
  },

  96: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '1080p',
    bitrate: 2500000,
    audioBitrate: 256,
  },

  100: {
    mimeType: 'audio/webm; codecs="VP8, vorbis"',
    qualityLabel: '360p',
    bitrate: null,
    audioBitrate: 128,
  },

  101: {
    mimeType: 'audio/webm; codecs="VP8, vorbis"',
    qualityLabel: '360p',
    bitrate: null,
    audioBitrate: 192,
  },

  102: {
    mimeType: 'audio/webm; codecs="VP8, vorbis"',
    qualityLabel: '720p',
    bitrate: null,
    audioBitrate: 192,
  },

  120: {
    mimeType: 'video/flv; codecs="H.264, aac"',
    qualityLabel: '720p',
    bitrate: 2000000,
    audioBitrate: 128,
  },

  127: {
    mimeType: 'audio/ts; codecs="aac"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 96,
  },

  128: {
    mimeType: 'audio/ts; codecs="aac"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 96,
  },

  132: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '240p',
    bitrate: 150000,
    audioBitrate: 48,
  },

  133: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '240p',
    bitrate: 200000,
    audioBitrate: null,
  },

  134: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '360p',
    bitrate: 300000,
    audioBitrate: null,
  },

  135: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '480p',
    bitrate: 500000,
    audioBitrate: null,
  },

  136: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '720p',
    bitrate: 1000000,
    audioBitrate: null,
  },

  137: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '1080p',
    bitrate: 2500000,
    audioBitrate: null,
  },

  138: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '4320p',
    bitrate: 13500000,
    audioBitrate: null,
  },

  139: {
    mimeType: 'audio/mp4; codecs="aac"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 48,
  },

  140: {
    mimeType: 'audio/m4a; codecs="aac"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 128,
  },

  141: {
    mimeType: 'audio/mp4; codecs="aac"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 256,
  },

  151: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '720p',
    bitrate: 50000,
    audioBitrate: 24,
  },

  160: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '144p',
    bitrate: 100000,
    audioBitrate: null,
  },

  171: {
    mimeType: 'audio/webm; codecs="vorbis"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 128,
  },

  172: {
    mimeType: 'audio/webm; codecs="vorbis"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 192,
  },

  242: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '240p',
    bitrate: 100000,
    audioBitrate: null,
  },

  243: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '360p',
    bitrate: 250000,
    audioBitrate: null,
  },

  244: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '480p',
    bitrate: 500000,
    audioBitrate: null,
  },

  247: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '720p',
    bitrate: 700000,
    audioBitrate: null,
  },

  248: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '1080p',
    bitrate: 1500000,
    audioBitrate: null,
  },

  249: {
    mimeType: 'audio/webm; codecs="opus"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 48,
  },

  250: {
    mimeType: 'audio/webm; codecs="opus"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 64,
  },

  251: {
    mimeType: 'audio/webm; codecs="opus"',
    qualityLabel: null,
    bitrate: null,
    audioBitrate: 160,
  },

  264: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '1440p',
    bitrate: 4000000,
    audioBitrate: null,
  },

  266: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '2160p',
    bitrate: 12500000,
    audioBitrate: null,
  },

  271: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '1440p',
    bitrate: 9000000,
    audioBitrate: null,
  },

  272: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '4320p',
    bitrate: 20000000,
    audioBitrate: null,
  },

  278: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '144p 30fps',
    bitrate: 80000,
    audioBitrate: null,
  },

  298: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '720p',
    bitrate: 3000000,
    audioBitrate: null,
  },

  299: {
    mimeType: 'video/mp4; codecs="H.264"',
    qualityLabel: '1080p',
    bitrate: 5500000,
    audioBitrate: null,
  },

  300: {
    mimeType: 'video/ts; codecs="H.264, aac"',
    qualityLabel: '720p',
    bitrate: 1318000,
    audioBitrate: 48,
  },

  302: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '720p HFR',
    bitrate: 2500000,
    audioBitrate: null,
  },

  303: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '1080p HFR',
    bitrate: 5000000,
    audioBitrate: null,
  },

  308: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '1440p HFR',
    bitrate: 10000000,
    audioBitrate: null,
  },

  313: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '2160p',
    bitrate: 13000000,
    audioBitrate: null,
  },

  315: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '2160p HFR',
    bitrate: 20000000,
    audioBitrate: null,
  },

  330: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '144p HDR, HFR',
    bitrate: 80000,
    audioBitrate: null,
  },

  331: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '240p HDR, HFR',
    bitrate: 100000,
    audioBitrate: null,
  },

  332: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '360p HDR, HFR',
    bitrate: 250000,
    audioBitrate: null,
  },

  333: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '240p HDR, HFR',
    bitrate: 500000,
    audioBitrate: null,
  },

  334: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '720p HDR, HFR',
    bitrate: 1000000,
    audioBitrate: null,
  },

  335: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '1080p HDR, HFR',
    bitrate: 1500000,
    audioBitrate: null,
  },

  336: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '1440p HDR, HFR',
    bitrate: 5000000,
    audioBitrate: null,
  },

  337: {
    mimeType: 'video/webm; codecs="VP9"',
    qualityLabel: '2160p HDR, HFR',
    bitrate: 12000000,
    audioBitrate: null,
  },

};

},{}],72:[function(reqqq,module,exports){
(function (setImmediate){(function (){
const PassThrough = reqqq('stream').PassThrough;
const getInfo = reqqq('./info');
const utils = reqqq('./utils');
const formatUtils = reqqq('./format-utils');
const urlUtils = reqqq('./url-utils');
const sig = reqqq('./sig');
const miniget = reqqq('miniget');
const m3u8stream = reqqq('m3u8stream');
const { parseTimestamp } = reqqq('m3u8stream');


/**
 * @param {string} link
 * @param {!Object} options
 * @returns {ReadableStream}
 */
const ytdl = (link, options) => {
  const stream = createStream(options);
  ytdl.getInfo(link, options).then(info => {
    downloadFromInfoCallback(stream, info, options);
  }, stream.emit.bind(stream, 'error'));
  return stream;
};
module.exports = ytdl;

ytdl.getBasicInfo = getInfo.getBasicInfo;
ytdl.getInfo = getInfo.getInfo;
ytdl.chooseFormat = formatUtils.chooseFormat;
ytdl.filterFormats = formatUtils.filterFormats;
ytdl.validateID = urlUtils.validateID;
ytdl.validateURL = urlUtils.validateURL;
ytdl.getURLVideoID = urlUtils.getURLVideoID;
ytdl.getVideoID = urlUtils.getVideoID;
ytdl.cache = {
  sig: sig.cache,
  info: getInfo.cache,
  watch: getInfo.watchPageCache,
  cookie: getInfo.cookieCache,
};
ytdl.version = reqqq('../package.json').version;


const createStream = options => {
  const stream = new PassThrough({
    highWaterMark: (options && options.highWaterMark) || 1024 * 512,
  });
  stream._destroy = () => { stream.destroyed = true; };
  return stream;
};


const pipeAndSetEvents = (req, stream, end) => {
  // Forward events from the request to the stream.
  [
    'abort', 'request', 'response', 'error', 'redirect', 'retry', 'reconnect',
  ].forEach(event => {
    req.prependListener(event, stream.emit.bind(stream, event));
  });
  req.pipe(stream, { end });
};


/**
 * Chooses a format to download.
 *
 * @param {stream.Readable} stream
 * @param {Object} info
 * @param {Object} options
 */
const downloadFromInfoCallback = (stream, info, options) => {
  options = options || {};

  let err = utils.playError(info.player_response, ['UNPLAYABLE', 'LIVE_STREAM_OFFLINE', 'LOGIN_reqqqD']);
  if (err) {
    stream.emit('error', err);
    return;
  }

  if (!info.formats.length) {
    stream.emit('error', Error('This video is unavailable'));
    return;
  }

  let format;
  try {
    format = formatUtils.chooseFormat(info.formats, options);
  } catch (e) {
    stream.emit('error', e);
    return;
  }
  stream.emit('info', info, format);
  if (stream.destroyed) { return; }

  let contentLength, downloaded = 0;
  const ondata = chunk => {
    downloaded += chunk.length;
    stream.emit('progress', chunk.length, downloaded, contentLength);
  };

  if (options.IPv6Block) {
    options.requestOptions = Object.assign({}, options.requestOptions, {
      family: 6,
      localAddress: utils.getRandomIPv6(options.IPv6Block),
    });
  }

  // Download the file in chunks, in this case the default is 10MB,
  // anything over this will cause youtube to throttle the download
  const dlChunkSize = options.dlChunkSize || 1024 * 1024 * 10;
  let req;
  let shouldEnd = true;

  if (format.isHLS || format.isDashMPD) {
    req = m3u8stream(format.url, {
      chunkReadahead: +info.live_chunk_readahead,
      begin: options.begin || (format.isLive && Date.now()),
      liveBuffer: options.liveBuffer,
      requestOptions: options.requestOptions,
      parser: format.isDashMPD ? 'dash-mpd' : 'm3u8',
      id: format.itag,
    });

    req.on('progress', (segment, totalSegments) => {
      stream.emit('progress', segment.size, segment.num, totalSegments);
    });
    pipeAndSetEvents(req, stream, shouldEnd);
  } else {
    const requestOptions = Object.assign({}, options.requestOptions, {
      maxReconnects: 6,
      maxRetries: 3,
      backoff: { inc: 500, max: 10000 },
    });

    let shouldBeChunked = dlChunkSize !== 0 && (!format.hasAudio || !format.hasVideo);

    if (shouldBeChunked) {
      let start = (options.range && options.range.start) || 0;
      let end = start + dlChunkSize;
      const rangeEnd = options.range && options.range.end;

      contentLength = options.range ?
        (rangeEnd ? rangeEnd + 1 : parseInt(format.contentLength)) - start :
        parseInt(format.contentLength);

      const getNextChunk = () => {
        if (!rangeEnd && end >= contentLength) end = 0;
        if (rangeEnd && end > rangeEnd) end = rangeEnd;
        shouldEnd = !end || end === rangeEnd;

        requestOptions.headers = Object.assign({}, requestOptions.headers, {
          Range: `bytes=${start}-${end || ''}`,
        });

        req = miniget(format.url, requestOptions);
        req.on('data', ondata);
        req.on('end', () => {
          if (stream.destroyed) { return; }
          if (end && end !== rangeEnd) {
            start = end + 1;
            end += dlChunkSize;
            getNextChunk();
          }
        });
        pipeAndSetEvents(req, stream, shouldEnd);
      };
      getNextChunk();
    } else {
      // Audio only and video only formats don't support begin
      if (options.begin) {
        format.url += `&begin=${parseTimestamp(options.begin)}`;
      }
      if (options.range && (options.range.start || options.range.end)) {
        requestOptions.headers = Object.assign({}, requestOptions.headers, {
          Range: `bytes=${options.range.start || '0'}-${options.range.end || ''}`,
        });
      }
      req = miniget(format.url, requestOptions);
      req.on('response', res => {
        if (stream.destroyed) { return; }
        contentLength = contentLength || parseInt(res.headers['content-length']);
      });
      req.on('data', ondata);
      pipeAndSetEvents(req, stream, shouldEnd);
    }
  }

  stream._destroy = () => {
    stream.destroyed = true;
    req.destroy();
    req.end();
  };
};


/**
 * Can be used to download video after its `info` is gotten through
 * `ytdl.getInfo()`. In case the user might want to look at the
 * `info` object before deciding to download.
 *
 * @param {Object} info
 * @param {!Object} options
 * @returns {ReadableStream}
 */
ytdl.downloadFromInfo = (info, options) => {
  const stream = createStream(options);
  if (!info.full) {
    throw Error('Cannot use `ytdl.downloadFromInfo()` when called ' +
      'with info from `ytdl.getBasicInfo()`');
  }
  setImmediate(() => {
    downloadFromInfoCallback(stream, info, options);
  });
  return stream;
};

}).call(this)}).call(this,reqqq("timers").setImmediate)
},{"../package.json":78,"./format-utils":70,"./info":74,"./sig":75,"./url-utils":76,"./utils":77,"m3u8stream":13,"miniget":18,"stream":28,"timers":63}],73:[function(reqqq,module,exports){
const utils = reqqq('./utils');
const qs = reqqq('querystring');
const { parseTimestamp } = reqqq('m3u8stream');


const BASE_URL = 'https://www.youtube.com/watch?v=';
const TITLE_TO_CATEGORY = {
  song: { name: 'Music', url: 'https://music.youtube.com/' },
};

const getText = obj => obj ? obj.runs ? obj.runs[0].text : obj.simpleText : null;


/**
 * Get video media.
 *
 * @param {Object} info
 * @returns {Object}
 */
exports.getMedia = info => {
  let media = {};
  let results = [];
  try {
    results = info.response.contents.twoColumnWatchNextResults.results.results.contents;
  } catch (err) {
    // Do nothing
  }

  let result = results.find(v => v.videoSecondaryInfoRenderer);
  if (!result) { return {}; }

  try {
    let metadataRows =
      (result.metadataRowContainer || result.videoSecondaryInfoRenderer.metadataRowContainer)
        .metadataRowContainerRenderer.rows;
    for (let row of metadataRows) {
      if (row.metadataRowRenderer) {
        let title = getText(row.metadataRowRenderer.title).toLowerCase();
        let contents = row.metadataRowRenderer.contents[0];
        media[title] = getText(contents);
        let runs = contents.runs;
        if (runs && runs[0].navigationEndpoint) {
          media[`${title}_url`] = new URL(
            runs[0].navigationEndpoint.commandMetadata.webCommandMetadata.url, BASE_URL).toString();
        }
        if (title in TITLE_TO_CATEGORY) {
          media.category = TITLE_TO_CATEGORY[title].name;
          media.category_url = TITLE_TO_CATEGORY[title].url;
        }
      } else if (row.richMetadataRowRenderer) {
        let contents = row.richMetadataRowRenderer.contents;
        let boxArt = contents
          .filter(meta => meta.richMetadataRenderer.style === 'RICH_METADATA_RENDERER_STYLE_BOX_ART');
        for (let { richMetadataRenderer } of boxArt) {
          let meta = richMetadataRenderer;
          media.year = getText(meta.subtitle);
          let type = getText(meta.callToAction).split(' ')[1];
          media[type] = getText(meta.title);
          media[`${type}_url`] = new URL(
            meta.endpoint.commandMetadata.webCommandMetadata.url, BASE_URL).toString();
          media.thumbnails = meta.thumbnail.thumbnails;
        }
        let topic = contents
          .filter(meta => meta.richMetadataRenderer.style === 'RICH_METADATA_RENDERER_STYLE_TOPIC');
        for (let { richMetadataRenderer } of topic) {
          let meta = richMetadataRenderer;
          media.category = getText(meta.title);
          media.category_url = new URL(
            meta.endpoint.commandMetadata.webCommandMetadata.url, BASE_URL).toString();
        }
      }
    }
  } catch (err) {
    // Do nothing.
  }

  return media;
};


const isVerified = badges => !!(badges && badges.find(b => b.metadataBadgeRenderer.tooltip === 'Verified'));


/**
 * Get video author.
 *
 * @param {Object} info
 * @returns {Object}
 */
exports.getAuthor = info => {
  let channelId, thumbnails = [], subscriberCount, verified = false;
  try {
    let results = info.response.contents.twoColumnWatchNextResults.results.results.contents;
    let v = results.find(v2 =>
      v2.videoSecondaryInfoRenderer &&
      v2.videoSecondaryInfoRenderer.owner &&
      v2.videoSecondaryInfoRenderer.owner.videoOwnerRenderer);
    let videoOwnerRenderer = v.videoSecondaryInfoRenderer.owner.videoOwnerRenderer;
    channelId = videoOwnerRenderer.navigationEndpoint.browseEndpoint.browseId;
    thumbnails = videoOwnerRenderer.thumbnail.thumbnails.map(thumbnail => {
      thumbnail.url = new URL(thumbnail.url, BASE_URL).toString();
      return thumbnail;
    });
    subscriberCount = utils.parseAbbreviatedNumber(getText(videoOwnerRenderer.subscriberCountText));
    verified = isVerified(videoOwnerRenderer.badges);
  } catch (err) {
    // Do nothing.
  }
  try {
    let videoDetails = info.player_response.microformat && info.player_response.microformat.playerMicroformatRenderer;
    let id = (videoDetails && videoDetails.channelId) || channelId || info.player_response.videoDetails.channelId;
    let author = {
      id: id,
      name: videoDetails ? videoDetails.ownerChannelName : info.player_response.videoDetails.author,
      user: videoDetails ? videoDetails.ownerProfileUrl.split('/').slice(-1)[0] : null,
      channel_url: `https://www.youtube.com/channel/${id}`,
      external_channel_url: videoDetails ? `https://www.youtube.com/channel/${videoDetails.externalChannelId}` : '',
      user_url: videoDetails ? new URL(videoDetails.ownerProfileUrl, BASE_URL).toString() : '',
      thumbnails,
      verified,
      subscriber_count: subscriberCount,
    };
    if (thumbnails.length) {
      utils.deprecate(author, 'avatar', author.thumbnails[0].url, 'author.avatar', 'author.thumbnails[0].url');
    }
    return author;
  } catch (err) {
    return {};
  }
};

const parseRelatedVideo = (details, rvsParams) => {
  if (!details) return;
  try {
    let viewCount = getText(details.viewCountText);
    let shortViewCount = getText(details.shortViewCountText);
    let rvsDetails = rvsParams.find(elem => elem.id === details.videoId);
    if (!/^\d/.test(shortViewCount)) {
      shortViewCount = (rvsDetails && rvsDetails.short_view_count_text) || '';
    }
    viewCount = (/^\d/.test(viewCount) ? viewCount : shortViewCount).split(' ')[0];
    let browseEndpoint = details.shortBylineText.runs[0].navigationEndpoint.browseEndpoint;
    let channelId = browseEndpoint.browseId;
    let name = getText(details.shortBylineText);
    let user = (browseEndpoint.canonicalBaseUrl || '').split('/').slice(-1)[0];
    let video = {
      id: details.videoId,
      title: getText(details.title),
      published: getText(details.publishedTimeText),
      author: {
        id: channelId,
        name,
        user,
        channel_url: `https://www.youtube.com/channel/${channelId}`,
        user_url: `https://www.youtube.com/user/${user}`,
        thumbnails: details.channelThumbnail.thumbnails.map(thumbnail => {
          thumbnail.url = new URL(thumbnail.url, BASE_URL).toString();
          return thumbnail;
        }),
        verified: isVerified(details.ownerBadges),

        [Symbol.toPrimitive]() {
          console.warn(`\`relatedVideo.author\` will be removed in a near future release, ` +
            `use \`relatedVideo.author.name\` instead.`);
          return video.author.name;
        },

      },
      short_view_count_text: shortViewCount.split(' ')[0],
      view_count: viewCount.replace(/,/g, ''),
      length_seconds: details.lengthText ?
        Math.floor(parseTimestamp(getText(details.lengthText)) / 1000) :
        rvsParams && `${rvsParams.length_seconds}`,
      thumbnails: details.thumbnail.thumbnails,
      richThumbnails:
        details.richThumbnail ?
          details.richThumbnail.movingThumbnailRenderer.movingThumbnailDetails.thumbnails : [],
      isLive: !!(details.badges && details.badges.find(b => b.metadataBadgeRenderer.label === 'LIVE NOW')),
    };

    utils.deprecate(video, 'author_thumbnail', video.author.thumbnails[0].url,
      'relatedVideo.author_thumbnail', 'relatedVideo.author.thumbnails[0].url');
    utils.deprecate(video, 'ucid', video.author.id, 'relatedVideo.ucid', 'relatedVideo.author.id');
    utils.deprecate(video, 'video_thumbnail', video.thumbnails[0].url,
      'relatedVideo.video_thumbnail', 'relatedVideo.thumbnails[0].url');
    return video;
  } catch (err) {
    // Skip.
  }
};

/**
 * Get related videos.
 *
 * @param {Object} info
 * @returns {Array.<Object>}
 */
exports.getRelatedVideos = info => {
  let rvsParams = [], secondaryResults = [];
  try {
    rvsParams = info.response.webWatchNextResponseExtensionData.relatedVideoArgs.split(',').map(e => qs.parse(e));
  } catch (err) {
    // Do nothing.
  }
  try {
    secondaryResults = info.response.contents.twoColumnWatchNextResults.secondaryResults.secondaryResults.results;
  } catch (err) {
    return [];
  }
  let videos = [];
  for (let result of secondaryResults || []) {
    let details = result.compactVideoRenderer;
    if (details) {
      let video = parseRelatedVideo(details, rvsParams);
      if (video) videos.push(video);
    } else {
      let autoplay = result.compactAutoplayRenderer || result.itemSectionRenderer;
      if (!autoplay || !Array.isArray(autoplay.contents)) continue;
      for (let content of autoplay.contents) {
        let video = parseRelatedVideo(content.compactVideoRenderer, rvsParams);
        if (video) videos.push(video);
      }
    }
  }
  return videos;
};

/**
 * Get like count.
 *
 * @param {Object} info
 * @returns {number}
 */
exports.getLikes = info => {
  try {
    let contents = info.response.contents.twoColumnWatchNextResults.results.results.contents;
    let video = contents.find(r => r.videoPrimaryInfoRenderer);
    let buttons = video.videoPrimaryInfoRenderer.videoActions.menuRenderer.topLevelButtons;
    let like = buttons.find(b => b.toggleButtonRenderer &&
      b.toggleButtonRenderer.defaultIcon.iconType === 'LIKE');
    return parseInt(like.toggleButtonRenderer.defaultText.accessibility.accessibilityData.label.replace(/\D+/g, ''));
  } catch (err) {
    return null;
  }
};

/**
 * Get dislike count.
 *
 * @param {Object} info
 * @returns {number}
 */
exports.getDislikes = info => {
  try {
    let contents = info.response.contents.twoColumnWatchNextResults.results.results.contents;
    let video = contents.find(r => r.videoPrimaryInfoRenderer);
    let buttons = video.videoPrimaryInfoRenderer.videoActions.menuRenderer.topLevelButtons;
    let dislike = buttons.find(b => b.toggleButtonRenderer &&
      b.toggleButtonRenderer.defaultIcon.iconType === 'DISLIKE');
    return parseInt(dislike.toggleButtonRenderer.defaultText.accessibility.accessibilityData.label.replace(/\D+/g, ''));
  } catch (err) {
    return null;
  }
};

/**
 * Cleans up a few fields on `videoDetails`.
 *
 * @param {Object} videoDetails
 * @param {Object} info
 * @returns {Object}
 */
exports.cleanVideoDetails = (videoDetails, info) => {
  videoDetails.thumbnails = videoDetails.thumbnail.thumbnails;
  delete videoDetails.thumbnail;
  utils.deprecate(videoDetails, 'thumbnail', { thumbnails: videoDetails.thumbnails },
    'videoDetails.thumbnail.thumbnails', 'videoDetails.thumbnails');
  videoDetails.description = videoDetails.shortDescription || getText(videoDetails.description);
  delete videoDetails.shortDescription;
  utils.deprecate(videoDetails, 'shortDescription', videoDetails.description,
    'videoDetails.shortDescription', 'videoDetails.description');

  // Use more reliable `lengthSeconds` from `playerMicroformatRenderer`.
  videoDetails.lengthSeconds =
    (info.player_response.microformat &&
    info.player_response.microformat.playerMicroformatRenderer.lengthSeconds) ||
    info.player_response.videoDetails.lengthSeconds;
  return videoDetails;
};

/**
 * Get storyboards info.
 *
 * @param {Object} info
 * @returns {Array.<Object>}
 */
exports.getStoryboards = info => {
  const parts = info.player_response.storyboards &&
    info.player_response.storyboards.playerStoryboardSpecRenderer &&
    info.player_response.storyboards.playerStoryboardSpecRenderer.spec &&
    info.player_response.storyboards.playerStoryboardSpecRenderer.spec.split('|');

  if (!parts) return [];

  const url = new URL(parts.shift());

  return parts.map((part, i) => {
    let [
      thumbnailWidth,
      thumbnailHeight,
      thumbnailCount,
      columns,
      rows,
      interval,
      nameReplacement,
      sigh,
    ] = part.split('#');

    url.searchParams.set('sigh', sigh);

    thumbnailCount = parseInt(thumbnailCount, 10);
    columns = parseInt(columns, 10);
    rows = parseInt(rows, 10);

    const storyboardCount = Math.ceil(thumbnailCount / (columns * rows));

    return {
      templateUrl: url.toString().replace('$L', i).replace('$N', nameReplacement),
      thumbnailWidth: parseInt(thumbnailWidth, 10),
      thumbnailHeight: parseInt(thumbnailHeight, 10),
      thumbnailCount,
      interval: parseInt(interval, 10),
      columns,
      rows,
      storyboardCount,
    };
  });
};

/**
 * Get chapters info.
 *
 * @param {Object} info
 * @returns {Array.<Object>}
 */
exports.getChapters = info => {
  const playerOverlayRenderer = info.response &&
    info.response.playerOverlays &&
    info.response.playerOverlays.playerOverlayRenderer;
  const playerBar = playerOverlayRenderer &&
    playerOverlayRenderer.decoratedPlayerBarRenderer &&
    playerOverlayRenderer.decoratedPlayerBarRenderer.decoratedPlayerBarRenderer &&
    playerOverlayRenderer.decoratedPlayerBarRenderer.decoratedPlayerBarRenderer.playerBar;
  const markersMap = playerBar &&
    playerBar.multiMarkersPlayerBarRenderer &&
    playerBar.multiMarkersPlayerBarRenderer.markersMap;
  const marker = Array.isArray(markersMap) && markersMap.find(m => m.value && Array.isArray(m.value.chapters));
  if (!marker) return [];
  const chapters = marker.value.chapters;

  return chapters.map(chapter => ({
    title: getText(chapter.chapterRenderer.title),
    start_time: chapter.chapterRenderer.timeRangeStartMillis / 1000,
  }));
};

},{"./utils":77,"m3u8stream":13,"querystring":25}],74:[function(reqqq,module,exports){
const querystring = reqqq('querystring');
const sax = reqqq('sax');
const miniget = reqqq('miniget');
const utils = reqqq('./utils');
// Forces Node JS version of setTimeout for Electron based applications
const { setTimeout } = reqqq('timers');
const formatUtils = reqqq('./format-utils');
const urlUtils = reqqq('./url-utils');
const extras = reqqq('./info-extras');
const sig = reqqq('./sig');
const Cache = reqqq('./cache');


const BASE_URL = 'https://www.youtube.com/watch?v=';


// Cached for storing basic/full info.
exports.cache = new Cache();
exports.cookieCache = new Cache(1000 * 60 * 60 * 24);
exports.watchPageCache = new Cache();
// Cache for cver used in getVideoInfoPage
let cver = '2.20210622.10.00';


// Special error class used to determine if an error is unrecoverable,
// as in, ytdl-core should not try again to fetch the video metadata.
// In this case, the video is usually unavailable in some way.
class UnrecoverableError extends Error {}


// List of URLs that show up in `notice_url` for age restricted videos.
const AGE_RESTRICTED_URLS = [
  'support.google.com/youtube/?p=age_restrictions',
  'youtube.com/t/community_guidelines',
];


/**
 * Gets info from a video without getting additional formats.
 *
 * @param {string} id
 * @param {Object} options
 * @returns {Promise<Object>}
*/
exports.getBasicInfo = async(id, options) => {
  if (options.IPv6Block) {
    options.requestOptions = Object.assign({}, options.requestOptions, {
      family: 6,
      localAddress: utils.getRandomIPv6(options.IPv6Block),
    });
  }
  const retryOptions = Object.assign({}, miniget.defaultOptions, options.requestOptions);
  options.requestOptions = Object.assign({}, options.requestOptions, {});
  options.requestOptions.headers = Object.assign({},
    {
      // eslint-disable-next-line max-len
      'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Safari/537.36',
    }, options.requestOptions.headers);
  const validate = info => {
    let playErr = utils.playError(info.player_response, ['ERROR'], UnrecoverableError);
    let privateErr = privateVideoError(info.player_response);
    if (playErr || privateErr) {
      throw playErr || privateErr;
    }
    return info && info.player_response && (
      info.player_response.streamingData || isRental(info.player_response) || isNotYetBroadcasted(info.player_response)
    );
  };
  let info = await pipeline([id, options], validate, retryOptions, [
    getWatchHTMLPage,
    getWatchJSONPage,
    getVideoInfoPage,
  ]);

  Object.assign(info, {
    formats: parseFormats(info.player_response),
    related_videos: extras.getRelatedVideos(info),
  });

  // Add additional properties to info.
  const media = extras.getMedia(info);
  const additional = {
    author: extras.getAuthor(info),
    media,
    likes: extras.getLikes(info),
    dislikes: extras.getDislikes(info),
    age_restricted: !!(media && AGE_RESTRICTED_URLS.some(url =>
      Object.values(media).some(v => typeof v === 'string' && v.includes(url)))
    ),

    // Give the standard link to the video.
    video_url: BASE_URL + id,
    storyboards: extras.getStoryboards(info),
    chapters: extras.getChapters(info),
  };

  info.videoDetails = extras.cleanVideoDetails(Object.assign({},
    info.player_response && info.player_response.microformat &&
    info.player_response.microformat.playerMicroformatRenderer,
    info.player_response && info.player_response.videoDetails, additional), info);

  return info;
};

const privateVideoError = player_response => {
  let playability = player_response && player_response.playabilityStatus;
  if (playability && playability.status === 'LOGIN_reqqqD' && playability.messages &&
    playability.messages.filter(m => /This is a private video/.test(m)).length) {
    return new UnrecoverableError(playability.reason || (playability.messages && playability.messages[0]));
  } else {
    return null;
  }
};


const isRental = player_response => {
  let playability = player_response.playabilityStatus;
  return playability && playability.status === 'UNPLAYABLE' &&
    playability.errorScreen && playability.errorScreen.playerLegacyDesktopYpcOfferRenderer;
};


const isNotYetBroadcasted = player_response => {
  let playability = player_response.playabilityStatus;
  return playability && playability.status === 'LIVE_STREAM_OFFLINE';
};


const getWatchHTMLURL = (id, options) => `${BASE_URL + id}&hl=${options.lang || 'en'}`;
const getWatchHTMLPageBody = (id, options) => {
  const url = getWatchHTMLURL(id, options);
  return exports.watchPageCache.getOrSet(url, () => utils.exposedMiniget(url, options).text());
};


const EMBED_URL = 'https://www.youtube.com/embed/';
const getEmbedPageBody = (id, options) => {
  const embedUrl = `${EMBED_URL + id}?hl=${options.lang || 'en'}`;
  return utils.exposedMiniget(embedUrl, options).text();
};


const getHTML5player = body => {
  let html5playerRes =
    /<script\s+src="([^"]+)"(?:\s+type="text\/javascript")?\s+name="player_ias\/base"\s*>|"jsUrl":"([^"]+)"/
      .exec(body);
  return html5playerRes ? html5playerRes[1] || html5playerRes[2] : null;
};


const getIdentityToken = (id, options, key, throwIfNotFound) =>
  exports.cookieCache.getOrSet(key, async() => {
    let page = await getWatchHTMLPageBody(id, options);
    let match = page.match(/(["'])ID_TOKEN\1[:,]\s?"([^"]+)"/);
    if (!match && throwIfNotFound) {
      throw new UnrecoverableError('Cookie header used in request, but unable to find YouTube identity token');
    }
    return match && match[2];
  });


/**
 * Goes through each endpoint in the pipeline, retrying on failure if the error is recoverable.
 * If unable to succeed with one endpoint, moves onto the next one.
 *
 * @param {Array.<Object>} args
 * @param {Function} validate
 * @param {Object} retryOptions
 * @param {Array.<Function>} endpoints
 * @returns {[Object, Object, Object]}
 */
const pipeline = async(args, validate, retryOptions, endpoints) => {
  let info;
  for (let func of endpoints) {
    try {
      const newInfo = await retryFunc(func, args.concat([info]), retryOptions);
      if (newInfo.player_response) {
        newInfo.player_response.videoDetails = assign(
          info && info.player_response && info.player_response.videoDetails,
          newInfo.player_response.videoDetails);
        newInfo.player_response = assign(info && info.player_response, newInfo.player_response);
      }
      info = assign(info, newInfo);
      if (validate(info, false)) {
        break;
      }
    } catch (err) {
      if (err instanceof UnrecoverableError || func === endpoints[endpoints.length - 1]) {
        throw err;
      }
      // Unable to find video metadata... so try next endpoint.
    }
  }
  return info;
};


/**
 * Like Object.assign(), but ignores `null` and `undefined` from `source`.
 *
 * @param {Object} target
 * @param {Object} source
 * @returns {Object}
 */
const assign = (target, source) => {
  if (!target || !source) { return target || source; }
  for (let [key, value] of Object.entries(source)) {
    if (value !== null && value !== undefined) {
      target[key] = value;
    }
  }
  return target;
};


/**
 * Given a function, calls it with `args` until it's successful,
 * or until it encounters an unrecoverable error.
 * Currently, any error from miniget is considered unrecoverable. Errors such as
 * too many redirects, invalid URL, status code 404, status code 502.
 *
 * @param {Function} func
 * @param {Array.<Object>} args
 * @param {Object} options
 * @param {number} options.maxRetries
 * @param {Object} options.backoff
 * @param {number} options.backoff.inc
 */
const retryFunc = async(func, args, options) => {
  let currentTry = 0, result;
  while (currentTry <= options.maxRetries) {
    try {
      result = await func(...args);
      break;
    } catch (err) {
      if (err instanceof UnrecoverableError ||
        (err instanceof miniget.MinigetError && err.statusCode < 500) || currentTry >= options.maxRetries) {
        throw err;
      }
      let wait = Math.min(++currentTry * options.backoff.inc, options.backoff.max);
      await new Promise(resolve => setTimeout(resolve, wait));
    }
  }
  return result;
};


const jsonClosingChars = /^[)\]}'\s]+/;
const parseJSON = (source, varName, json) => {
  if (!json || typeof json === 'object') {
    return json;
  } else {
    try {
      json = json.replace(jsonClosingChars, '');
      return JSON.parse(json);
    } catch (err) {
      throw Error(`Error parsing ${varName} in ${source}: ${err.message}`);
    }
  }
};


const findJSON = (source, varName, body, left, right, prependJSON) => {
  let jsonStr = utils.between(body, left, right);
  if (!jsonStr) {
    throw Error(`Could not find ${varName} in ${source}`);
  }
  return parseJSON(source, varName, utils.cutAfterJS(`${prependJSON}${jsonStr}`));
};


const findPlayerResponse = (source, info) => {
  const player_response = info && (
    (info.args && info.args.player_response) ||
    info.player_response || info.playerResponse || info.embedded_player_response);
  return parseJSON(source, 'player_response', player_response);
};


const getWatchJSONURL = (id, options) => `${getWatchHTMLURL(id, options)}&pbj=1`;
const getWatchJSONPage = async(id, options) => {
  const reqOptions = Object.assign({ headers: {} }, options.requestOptions);
  let cookie = reqOptions.headers.Cookie || reqOptions.headers.cookie;
  reqOptions.headers = Object.assign({
    'x-youtube-client-name': '1',
    'x-youtube-client-version': cver,
    'x-youtube-identity-token': exports.cookieCache.get(cookie || 'browser') || '',
  }, reqOptions.headers);

  const setIdentityToken = async(key, throwIfNotFound) => {
    if (reqOptions.headers['x-youtube-identity-token']) { return; }
    reqOptions.headers['x-youtube-identity-token'] = await getIdentityToken(id, options, key, throwIfNotFound);
  };

  if (cookie) {
    await setIdentityToken(cookie, true);
  }

  const jsonUrl = getWatchJSONURL(id, options);
  const body = await utils.exposedMiniget(jsonUrl, options, reqOptions).text();
  let parsedBody = parseJSON('watch.json', 'body', body);
  if (parsedBody.reload === 'now') {
    await setIdentityToken('browser', false);
  }
  if (parsedBody.reload === 'now' || !Array.isArray(parsedBody)) {
    throw Error('Unable to retrieve video metadata in watch.json');
  }
  let info = parsedBody.reduce((part, curr) => Object.assign(curr, part), {});
  info.player_response = findPlayerResponse('watch.json', info);
  info.html5player = info.player && info.player.assets && info.player.assets.js;

  return info;
};


const getWatchHTMLPage = async(id, options) => {
  let body = await getWatchHTMLPageBody(id, options);
  let info = { page: 'watch' };
  try {
    cver = utils.between(body, '{"key":"cver","value":"', '"}');
    info.player_response = findJSON('watch.html', 'player_response',
      body, /\bytInitialPlayerResponse\s*=\s*\{/i, '</script>', '{');
  } catch (err) {
    let args = findJSON('watch.html', 'player_response', body, /\bytplayer\.config\s*=\s*{/, '</script>', '{');
    info.player_response = findPlayerResponse('watch.html', args);
  }
  info.response = findJSON('watch.html', 'response', body, /\bytInitialData("\])?\s*=\s*\{/i, '</script>', '{');
  info.html5player = getHTML5player(body);
  return info;
};


const INFO_HOST = 'www.youtube.com';
const INFO_PATH = '/get_video_info';
const VIDEO_EURL = 'https://youtube.googleapis.com/v/';
const getVideoInfoPage = async(id, options) => {
  const url = new URL(`https://${INFO_HOST}${INFO_PATH}`);
  url.searchParams.set('video_id', id);
  url.searchParams.set('c', 'TVHTML5');
  url.searchParams.set('cver', `7${cver.substr(1)}`);
  url.searchParams.set('eurl', VIDEO_EURL + id);
  url.searchParams.set('ps', 'default');
  url.searchParams.set('gl', 'US');
  url.searchParams.set('hl', options.lang || 'en');
  url.searchParams.set('html5', '1');
  const body = await utils.exposedMiniget(url.toString(), options).text();
  let info = querystring.parse(body);
  info.player_response = findPlayerResponse('get_video_info', info);
  return info;
};


/**
 * @param {Object} player_response
 * @returns {Array.<Object>}
 */
const parseFormats = player_response => {
  let formats = [];
  if (player_response && player_response.streamingData) {
    formats = formats
      .concat(player_response.streamingData.formats || [])
      .concat(player_response.streamingData.adaptiveFormats || []);
  }
  return formats;
};


/**
 * Gets info from a video additional formats and deciphered URLs.
 *
 * @param {string} id
 * @param {Object} options
 * @returns {Promise<Object>}
 */
exports.getInfo = async(id, options) => {
  let info = await exports.getBasicInfo(id, options);
  const hasManifest =
    info.player_response && info.player_response.streamingData && (
      info.player_response.streamingData.dashManifestUrl ||
      info.player_response.streamingData.hlsManifestUrl
    );
  let funcs = [];
  if (info.formats.length) {
    info.html5player = info.html5player ||
      getHTML5player(await getWatchHTMLPageBody(id, options)) || getHTML5player(await getEmbedPageBody(id, options));
    if (!info.html5player) {
      throw Error('Unable to find html5player file');
    }
    const html5player = new URL(info.html5player, BASE_URL).toString();
    funcs.push(sig.decipherFormats(info.formats, html5player, options));
  }
  if (hasManifest && info.player_response.streamingData.dashManifestUrl) {
    let url = info.player_response.streamingData.dashManifestUrl;
    funcs.push(getDashManifest(url, options));
  }
  if (hasManifest && info.player_response.streamingData.hlsManifestUrl) {
    let url = info.player_response.streamingData.hlsManifestUrl;
    funcs.push(getM3U8(url, options));
  }

  let results = await Promise.all(funcs);
  info.formats = Object.values(Object.assign({}, ...results));
  info.formats = info.formats.map(formatUtils.addFormatMeta);
  info.formats.sort(formatUtils.sortFormats);
  info.full = true;
  return info;
};


/**
 * Gets additional DASH formats.
 *
 * @param {string} url
 * @param {Object} options
 * @returns {Promise<Array.<Object>>}
 */
const getDashManifest = (url, options) => new Promise((resolve, reject) => {
  let formats = {};
  const parser = sax.parser(false);
  parser.onerror = reject;
  let adaptationSet;
  parser.onopentag = node => {
    if (node.name === 'ADAPTATIONSET') {
      adaptationSet = node.attributes;
    } else if (node.name === 'REPRESENTATION') {
      const itag = parseInt(node.attributes.ID);
      if (!isNaN(itag)) {
        formats[url] = Object.assign({
          itag, url,
          bitrate: parseInt(node.attributes.BANDWIDTH),
          mimeType: `${adaptationSet.MIMETYPE}; codecs="${node.attributes.CODECS}"`,
        }, node.attributes.HEIGHT ? {
          width: parseInt(node.attributes.WIDTH),
          height: parseInt(node.attributes.HEIGHT),
          fps: parseInt(node.attributes.FRAMERATE),
        } : {
          audioSampleRate: node.attributes.AUDIOSAMPLINGRATE,
        });
      }
    }
  };
  parser.onend = () => { resolve(formats); };
  const req = utils.exposedMiniget(new URL(url, BASE_URL).toString(), options);
  req.setEncoding('utf8');
  req.on('error', reject);
  req.on('data', chunk => { parser.write(chunk); });
  req.on('end', parser.close.bind(parser));
});


/**
 * Gets additional formats.
 *
 * @param {string} url
 * @param {Object} options
 * @returns {Promise<Array.<Object>>}
 */
const getM3U8 = async(url, options) => {
  url = new URL(url, BASE_URL);
  const body = await utils.exposedMiniget(url.toString(), options).text();
  let formats = {};
  body
    .split('\n')
    .filter(line => /^https?:\/\//.test(line))
    .forEach(line => {
      const itag = parseInt(line.match(/\/itag\/(\d+)\//)[1]);
      formats[line] = { itag, url: line };
    });
  return formats;
};


// Cache get info functions.
// In case a user wants to get a video's info before downloading.
for (let funcName of ['getBasicInfo', 'getInfo']) {
  /**
   * @param {string} link
   * @param {Object} options
   * @returns {Promise<Object>}
   */
  const func = exports[funcName];
  exports[funcName] = async(link, options = {}) => {
    utils.checkForUpdates();
    let id = await urlUtils.getVideoID(link);
    const key = [funcName, id, options.lang].join('-');
    return exports.cache.getOrSet(key, () => func(id, options));
  };
}


// Export a few helpers.
exports.validateID = urlUtils.validateID;
exports.validateURL = urlUtils.validateURL;
exports.getURLVideoID = urlUtils.getURLVideoID;
exports.getVideoID = urlUtils.getVideoID;

},{"./cache":69,"./format-utils":70,"./info-extras":73,"./sig":75,"./url-utils":76,"./utils":77,"miniget":18,"querystring":25,"sax":27,"timers":63}],75:[function(reqqq,module,exports){
const querystring = reqqq('querystring');
const Cache = reqqq('./cache');
const utils = reqqq('./utils');
const vm = reqqq('vm');

// A shared cache to keep track of html5player js functions.
exports.cache = new Cache();

/**
 * Extract signature deciphering and n parameter transform functions from html5player file.
 *
 * @param {string} html5playerfile
 * @param {Object} options
 * @returns {Promise<Array.<string>>}
 */
exports.getFunctions = (html5playerfile, options) => exports.cache.getOrSet(html5playerfile, async() => {
  const body = await utils.exposedMiniget(html5playerfile, options).text();
  const functions = exports.extractFunctions(body);
  if (!functions || !functions.length) {
    throw Error('Could not extract functions');
  }
  exports.cache.set(html5playerfile, functions);
  return functions;
});

/**
 * Extracts the actions that should be taken to decipher a signature
 * and tranform the n parameter
 *
 * @param {string} body
 * @returns {Array.<string>}
 */
exports.extractFunctions = body => {
  const functions = [];
  const extractManipulations = caller => {
    const functionName = utils.between(caller, `a=a.split("");`, `.`);
    if (!functionName) return '';
    const functionStart = `var ${functionName}={`;
    const ndx = body.indexOf(functionStart);
    if (ndx < 0) return '';
    const subBody = body.slice(ndx + functionStart.length - 1);
    return `var ${functionName}=${utils.cutAfterJS(subBody)}`;
  };
  const extractDecipher = () => {
    const functionName = utils.between(body, `a.set("alr","yes");c&&(c=`, `(decodeURIC`);
    if (functionName && functionName.length) {
      const functionStart = `${functionName}=function(a)`;
      const ndx = body.indexOf(functionStart);
      if (ndx >= 0) {
        const subBody = body.slice(ndx + functionStart.length);
        let functionBody = `var ${functionStart}${utils.cutAfterJS(subBody)}`;
        functionBody = `${extractManipulations(functionBody)};${functionBody};${functionName}(sig);`;
        functions.push(functionBody);
      }
    }
  };
  const extractNCode = () => {
    let functionName = utils.between(body, `&&(b=a.get("n"))&&(b=`, `(b)`);
    if (functionName.includes('[')) functionName = utils.between(body, `${functionName.split('[')[0]}=[`, `]`);
    if (functionName && functionName.length) {
      const functionStart = `${functionName}=function(a)`;
      const ndx = body.indexOf(functionStart);
      if (ndx >= 0) {
        const subBody = body.slice(ndx + functionStart.length);
        const functionBody = `var ${functionStart}${utils.cutAfterJS(subBody)};${functionName}(ncode);`;
        functions.push(functionBody);
      }
    }
  };
  extractDecipher();
  extractNCode();
  return functions;
};

/**
 * Apply decipher and n-transform to individual format
 *
 * @param {Object} format
 * @param {vm.Script} decipherScript
 * @param {vm.Script} nTransformScript
 */
exports.setDownloadURL = (format, decipherScript, nTransformScript) => {
  const decipher = url => {
    const args = querystring.parse(url);
    if (!args.s || !decipherScript) return args.url;
    const components = new URL(decodeURIComponent(args.url));
    components.searchParams.set(args.sp ? args.sp : 'signature',
      decipherScript.runInNewContext({ sig: decodeURIComponent(args.s) }));
    return components.toString();
  };
  const ncode = url => {
    const components = new URL(decodeURIComponent(url));
    const n = components.searchParams.get('n');
    if (!n || !nTransformScript) return url;
    components.searchParams.set('n', nTransformScript.runInNewContext({ ncode: n }));
    return components.toString();
  };
  const cipher = !format.url;
  const url = format.url || format.signatureCipher || format.cipher;
  format.url = cipher ? ncode(decipher(url)) : ncode(url);
  delete format.signatureCipher;
  delete format.cipher;
};

/**
 * Applies decipher and n parameter transforms to all format URL's.
 *
 * @param {Array.<Object>} formats
 * @param {string} html5player
 * @param {Object} options
 */
exports.decipherFormats = async(formats, html5player, options) => {
  let decipheredFormats = {};
  let functions = await exports.getFunctions(html5player, options);
  const decipherScript = functions.length ? new vm.Script(functions[0]) : null;
  const nTransformScript = functions.length > 1 ? new vm.Script(functions[1]) : null;
  formats.forEach(format => {
    exports.setDownloadURL(format, decipherScript, nTransformScript);
    decipheredFormats[format.url] = format;
  });
  return decipheredFormats;
};

},{"./cache":69,"./utils":77,"querystring":25,"vm":67}],76:[function(reqqq,module,exports){
/**
 * Get video ID.
 *
 * There are a few type of video URL formats.
 *  - https://www.youtube.com/watch?v=VIDEO_ID
 *  - https://m.youtube.com/watch?v=VIDEO_ID
 *  - https://youtu.be/VIDEO_ID
 *  - https://www.youtube.com/v/VIDEO_ID
 *  - https://www.youtube.com/embed/VIDEO_ID
 *  - https://music.youtube.com/watch?v=VIDEO_ID
 *  - https://gaming.youtube.com/watch?v=VIDEO_ID
 *
 * @param {string} link
 * @return {string}
 * @throws {Error} If unable to find a id
 * @throws {TypeError} If videoid doesn't match specs
 */
const validQueryDomains = new Set([
  'youtube.com',
  'www.youtube.com',
  'm.youtube.com',
  'music.youtube.com',
  'gaming.youtube.com',
]);
const validPathDomains = /^https?:\/\/(youtu\.be\/|(www\.)?youtube\.com\/(embed|v|shorts)\/)/;
exports.getURLVideoID = link => {
  const parsed = new URL(link.trim());
  let id = parsed.searchParams.get('v');
  if (validPathDomains.test(link.trim()) && !id) {
    const paths = parsed.pathname.split('/');
    id = parsed.host === 'youtu.be' ? paths[1] : paths[2];
  } else if (parsed.hostname && !validQueryDomains.has(parsed.hostname)) {
    throw Error('Not a YouTube domain');
  }
  if (!id) {
    throw Error(`No video id found: "${link}"`);
  }
  id = id.substring(0, 11);
  if (!exports.validateID(id)) {
    throw TypeError(`Video id (${id}) does not match expected ` +
      `format (${idRegex.toString()})`);
  }
  return id;
};


/**
 * Gets video ID either from a url or by checking if the given string
 * matches the video ID format.
 *
 * @param {string} str
 * @returns {string}
 * @throws {Error} If unable to find a id
 * @throws {TypeError} If videoid doesn't match specs
 */
const urlRegex = /^https?:\/\//;
exports.getVideoID = str => {
  if (exports.validateID(str)) {
    return str;
  } else if (urlRegex.test(str.trim())) {
    return exports.getURLVideoID(str);
  } else {
    throw Error(`No video id found: ${str}`);
  }
};


/**
 * Returns true if given id satifies YouTube's id format.
 *
 * @param {string} id
 * @return {boolean}
 */
const idRegex = /^[a-zA-Z0-9-_]{11}$/;
exports.validateID = id => idRegex.test(id.trim());


/**
 * Checks wether the input string includes a valid id.
 *
 * @param {string} string
 * @returns {boolean}
 */
exports.validateURL = string => {
  try {
    exports.getURLVideoID(string);
    return true;
  } catch (e) {
    return false;
  }
};

},{}],77:[function(reqqq,module,exports){
(function (process){(function (){
const miniget = reqqq('miniget');


/**
 * Extract string inbetween another.
 *
 * @param {string} haystack
 * @param {string} left
 * @param {string} right
 * @returns {string}
 */
exports.between = (haystack, left, right) => {
  let pos;
  if (left instanceof RegExp) {
    const match = haystack.match(left);
    if (!match) { return ''; }
    pos = match.index + match[0].length;
  } else {
    pos = haystack.indexOf(left);
    if (pos === -1) { return ''; }
    pos += left.length;
  }
  haystack = haystack.slice(pos);
  pos = haystack.indexOf(right);
  if (pos === -1) { return ''; }
  haystack = haystack.slice(0, pos);
  return haystack;
};


/**
 * Get a number from an abbreviated number string.
 *
 * @param {string} string
 * @returns {number}
 */
exports.parseAbbreviatedNumber = string => {
  const match = string
    .replace(',', '.')
    .replace(' ', '')
    .match(/([\d,.]+)([MK]?)/);
  if (match) {
    let [, num, multi] = match;
    num = parseFloat(num);
    return Math.round(multi === 'M' ? num * 1000000 :
      multi === 'K' ? num * 1000 : num);
  }
  return null;
};

/**
 * Escape sequences for cutAfterJS
 * @param {string} start the character string the escape sequence
 * @param {string} end the character string to stop the escape seequence
 * @param {undefined|Regex} startPrefix a regex to check against the preceding 10 characters
 */
const ESCAPING_SEQUENZES = [
  // Strings
  { start: '"', end: '"' },
  { start: "'", end: "'" },
  { start: '`', end: '`' },
  // RegeEx
  { start: '/', end: '/', startPrefix: /(^|[[{:;,])\s?$/ },
];

/**
 * Match begin and end braces of input JS, return only JS
 *
 * @param {string} mixedJson
 * @returns {string}
*/
exports.cutAfterJS = mixedJson => {
  // Define the general open and closing tag
  let open, close;
  if (mixedJson[0] === '[') {
    open = '[';
    close = ']';
  } else if (mixedJson[0] === '{') {
    open = '{';
    close = '}';
  }

  if (!open) {
    throw new Error(`Can't cut unsupported JSON (need to begin with [ or { ) but got: ${mixedJson[0]}`);
  }

  // States if the loop is currently inside an escaped js object
  let isEscapedObject = null;

  // States if the current character is treated as escaped or not
  let isEscaped = false;

  // Current open brackets to be closed
  let counter = 0;

  let i;
  // Go through all characters from the start
  for (i = 0; i < mixedJson.length; i++) {
    // End of current escaped object
    if (!isEscaped && isEscapedObject !== null && mixedJson[i] === isEscapedObject.end) {
      isEscapedObject = null;
      continue;
    // Might be the start of a new escaped object
    } else if (!isEscaped && isEscapedObject === null) {
      for (const escaped of ESCAPING_SEQUENZES) {
        if (mixedJson[i] !== escaped.start) continue;
        // Test startPrefix against last 10 characters
        if (!escaped.startPrefix || mixedJson.substring(i - 10, i).match(escaped.startPrefix)) {
          isEscapedObject = escaped;
          break;
        }
      }
      // Continue if we found a new escaped object
      if (isEscapedObject !== null) {
        continue;
      }
    }

    // Toggle the isEscaped boolean for every backslash
    // Reset for every regular character
    isEscaped = mixedJson[i] === '\\' && !isEscaped;

    if (isEscapedObject !== null) continue;

    if (mixedJson[i] === open) {
      counter++;
    } else if (mixedJson[i] === close) {
      counter--;
    }

    // All brackets have been closed, thus end of JSON is reached
    if (counter === 0) {
      // Return the cut JSON
      return mixedJson.substring(0, i + 1);
    }
  }

  // We ran through the whole string and ended up with an unclosed bracket
  throw Error("Can't cut unsupported JSON (no matching closing bracket found)");
};


/**
 * Checks if there is a playability error.
 *
 * @param {Object} player_response
 * @param {Array.<string>} statuses
 * @param {Error} ErrorType
 * @returns {!Error}
 */
exports.playError = (player_response, statuses, ErrorType = Error) => {
  let playability = player_response && player_response.playabilityStatus;
  if (playability && statuses.includes(playability.status)) {
    return new ErrorType(playability.reason || (playability.messages && playability.messages[0]));
  }
  return null;
};

/**
 * Does a miniget request and calls options.requestCallback if present
 *
 * @param {string} url the request url
 * @param {Object} options an object with optional requestOptions and requestCallback parameters
 * @param {Object} requestOptionsOverwrite overwrite of options.requestOptions
 * @returns {miniget.Stream}
 */
exports.exposedMiniget = (url, options = {}, requestOptionsOverwrite) => {
  const req = miniget(url, requestOptionsOverwrite || options.requestOptions);
  if (typeof options.requestCallback === 'function') options.requestCallback(req);
  return req;
};

/**
 * Temporary helper to help deprecating a few properties.
 *
 * @param {Object} obj
 * @param {string} prop
 * @param {Object} value
 * @param {string} oldPath
 * @param {string} newPath
 */
exports.deprecate = (obj, prop, value, oldPath, newPath) => {
  Object.defineProperty(obj, prop, {
    get: () => {
      console.warn(`\`${oldPath}\` will be removed in a near future release, ` +
        `use \`${newPath}\` instead.`);
      return value;
    },
  });
};


// Check for updates.
const pkg = reqqq('../package.json');
const UPDATE_INTERVAL = 1000 * 60 * 60 * 12;
exports.lastUpdateCheck = 0;
exports.checkForUpdates = () => {
  if (!process.env.YTDL_NO_UPDATE && !pkg.version.startsWith('0.0.0-') &&
    Date.now() - exports.lastUpdateCheck >= UPDATE_INTERVAL) {
    exports.lastUpdateCheck = Date.now();
    return miniget('https://api.github.com/repos/fent/node-ytdl-core/releases/latest', {
      headers: { 'User-Agent': 'ytdl-core' },
    }).text().then(response => {
      if (JSON.parse(response).tag_name !== `v${pkg.version}`) {
        console.warn('\x1b[33mWARNING:\x1B[0m ytdl-core is out of date! Update with "npm install ytdl-core@latest".');
      }
    }, err => {
      console.warn('Error checking for updates:', err.message);
      console.warn('You can disable this check by setting the `YTDL_NO_UPDATE` env variable.');
    });
  }
  return null;
};


/**
 * Gets random IPv6 Address from a block
 *
 * @param {string} ip the IPv6 block in CIDR-Notation
 * @returns {string}
 */
exports.getRandomIPv6 = ip => {
  // Start with a fast Regex-Check
  if (!isIPv6(ip)) throw Error('Invalid IPv6 format');
  // Start by splitting and normalizing addr and mask
  const [rawAddr, rawMask] = ip.split('/');
  let base10Mask = parseInt(rawMask);
  if (!base10Mask || base10Mask > 128 || base10Mask < 24) throw Error('Invalid IPv6 subnet');
  const base10addr = normalizeIP(rawAddr);
  // Get random addr to pad with
  // using Math.random since we're not requiring high level of randomness
  const randomAddr = new Array(8).fill(1).map(() => Math.floor(Math.random() * 0xffff));

  // Merge base10addr with randomAddr
  const mergedAddr = randomAddr.map((randomItem, idx) => {
    // Calculate the amount of static bits
    const staticBits = Math.min(base10Mask, 16);
    // Adjust the bitmask with the staticBits
    base10Mask -= staticBits;
    // Calculate the bitmask
    // lsb makes the calculation way more complicated
    const mask = 0xffff - ((2 ** (16 - staticBits)) - 1);
    // Combine base10addr and random
    return (base10addr[idx] & mask) + (randomItem & (mask ^ 0xffff));
  });
  // Return new addr
  return mergedAddr.map(x => x.toString('16')).join(':');
};


// eslint-disable-next-line max-len
const IPV6_REGEX = /^(([0-9a-f]{1,4}:)(:[0-9a-f]{1,4}){1,6}|([0-9a-f]{1,4}:){1,2}(:[0-9a-f]{1,4}){1,5}|([0-9a-f]{1,4}:){1,3}(:[0-9a-f]{1,4}){1,4}|([0-9a-f]{1,4}:){1,4}(:[0-9a-f]{1,4}){1,3}|([0-9a-f]{1,4}:){1,5}(:[0-9a-f]{1,4}){1,2}|([0-9a-f]{1,4}:){1,6}(:[0-9a-f]{1,4})|([0-9a-f]{1,4}:){1,7}(([0-9a-f]{1,4})|:))\/(1[0-1]\d|12[0-8]|\d{1,2})$/;
/**
 * Quick check for a valid IPv6
 * The Regex only accepts a subset of all IPv6 Addresses
 *
 * @param {string} ip the IPv6 block in CIDR-Notation to test
 * @returns {boolean} true if valid
 */
const isIPv6 = exports.isIPv6 = ip => IPV6_REGEX.test(ip);


/**
 * Normalise an IP Address
 *
 * @param {string} ip the IPv6 Addr
 * @returns {number[]} the 8 parts of the IPv6 as Integers
 */
const normalizeIP = exports.normalizeIP = ip => {
  // Split by fill position
  const parts = ip.split('::').map(x => x.split(':'));
  // Normalize start and end
  const partStart = parts[0] || [];
  const partEnd = parts[1] || [];
  partEnd.reverse();
  // Placeholder for full ip
  const fullIP = new Array(8).fill(0);
  // Fill in start and end parts
  for (let i = 0; i < Math.min(partStart.length, 8); i++) {
    fullIP[i] = parseInt(partStart[i], 16) || 0;
  }
  for (let i = 0; i < Math.min(partEnd.length, 8); i++) {
    fullIP[7 - i] = parseInt(partEnd[i], 16) || 0;
  }
  return fullIP;
};

}).call(this)}).call(this,reqqq('_process'))
},{"../package.json":78,"_process":20,"miniget":18}],78:[function(reqqq,module,exports){
module.exports ={
  "name": "ytdl-core",
  "description": "YouTube video downloader in pure javascript.",
  "keywords": [
    "youtube",
    "video",
    "download"
  ],
  "version": "4.11.2",
  "repository": {
    "type": "git",
    "url": "git://github.com/fent/node-ytdl-core.git"
  },
  "author": "fent <fentbox@gmail.com> (https://github.com/fent)",
  "contributors": [
    "Tobias Kutscha (https://github.com/TimeForANinja)",
    "Andrew Kelley (https://github.com/andrewrk)",
    "Mauricio Allende (https://github.com/mallendeo)",
    "Rodrigo Altamirano (https://github.com/raltamirano)",
    "Jim Buck (https://github.com/JimmyBoh)",
    "Paweł Ruciński (https://github.com/Roki100)",
    "Alexander Paolini (https://github.com/Million900o)"
  ],
  "main": "./lib/index.js",
  "types": "./typings/index.d.ts",
  "files": [
    "lib",
    "typings"
  ],
  "scripts": {
    "test": "nyc --reporter=lcov --reporter=text-summary npm run test:unit",
    "test:unit": "mocha --ignore test/irl-test.js test/*-test.js --timeout 4000",
    "test:irl": "mocha --timeout 16000 test/irl-test.js",
    "lint": "eslint ./",
    "lint:fix": "eslint --fix ./",
    "lint:typings": "tslint typings/index.d.ts",
    "lint:typings:fix": "tslint --fix typings/index.d.ts"
  },
  "dependencies": {
    "m3u8stream": "^0.8.6",
    "miniget": "^4.2.2",
    "sax": "^1.1.3"
  },
  "devDependencies": {
    "@types/node": "^13.1.0",
    "assert-diff": "^3.0.1",
    "dtslint": "^3.6.14",
    "eslint": "^6.8.0",
    "mocha": "^7.0.0",
    "muk-reqqq": "^1.2.0",
    "nock": "^13.0.4",
    "nyc": "^15.0.0",
    "sinon": "^9.0.0",
    "stream-equal": "~1.1.0",
    "typescript": "^3.9.7"
  },
  "engines": {
    "node": ">=12"
  },
  "license": "MIT"
}

},{}]},{},[1]);




module.exports = ytdl_client;