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wombat.js
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wombat.js
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/* eslint-disable camelcase */
import FuncMap from './funcMap.js';
import { createStorage, Storage } from './customStorage.js';
import WombatLocation from './wombatLocation.js';
import AutoFetcher from './autoFetcher.js';
import { wrapEventListener, wrapSameOriginEventListener } from './listeners.js';
import {
addToStringTagToClass,
autobind,
ThrowExceptions
} from './wombatUtils.js';
import { postToGetUrl } from 'warcio/utils';
/**
* @param {Window} $wbwindow
* @param {Object} wbinfo
*/
function Wombat($wbwindow, wbinfo) {
if (!(this instanceof Wombat)) return new Wombat($wbwindow, wbinfo);
/** @type {boolean} */
this.debug_rw = false;
/** @type {Window} */
this.$wbwindow = $wbwindow;
this.WBWindow = Window;
this.URL = URL;
this.origHost = $wbwindow.location.host;
this.origHostname = $wbwindow.location.hostname;
this.origProtocol = $wbwindow.location.protocol;
/** @type {string} */
this.HTTP_PREFIX = 'http://';
/** @type {string} */
this.HTTPS_PREFIX = 'https://';
/** @type {string} */
this.REL_PREFIX = '//';
/** @type {Array<string>} */
this.VALID_PREFIXES = [this.HTTP_PREFIX, this.HTTPS_PREFIX, this.REL_PREFIX];
/** @type {Array<string>} */
this.IGNORE_PREFIXES = [
'#',
'about:',
'data:',
'blob:',
'mailto:',
'javascript:',
'{',
'*'
];
if ('ignore_prefixes' in wbinfo) {
this.IGNORE_PREFIXES = this.IGNORE_PREFIXES.concat(wbinfo.ignore_prefixes);
}
this.WB_CHECK_THIS_FUNC = '_____WB$wombat$check$this$function_____';
this.WB_ASSIGN_FUNC = '_____WB$wombat$assign$function_____';
/** @type {function(qualifiedName: string, value: string): void} */
this.wb_setAttribute = $wbwindow.Element.prototype.setAttribute;
/** @type {function(qualifiedName: string): ?string} */
this.wb_getAttribute = $wbwindow.Element.prototype.getAttribute;
/** @type {function(): string} */
this.wb_funToString = Function.prototype.toString;
/** @type {AutoFetcher} */
this.WBAutoFetchWorker = null;
/** @type {boolean} */
this.wbUseAFWorker =
wbinfo.enable_auto_fetch && $wbwindow.Worker != null && wbinfo.is_live;
/** @type {string} */
this.wb_rel_prefix = '';
/** @type {boolean} */
this.wb_wombat_updating = false;
/** @type {FuncMap} */
this.message_listeners = new FuncMap();
/** @type {FuncMap} */
this.storage_listeners = new FuncMap();
/**
* rewrite modifiers for <link href="URL" rel="import|preload" as="x">
* expressed as as-value -> modifier
* @type {Object}
*/
this.linkAsTypes = {
script: 'js_',
worker: 'js_',
style: 'cs_',
image: 'im_',
document: 'if_',
fetch: 'mp_',
font: 'oe_',
audio: 'oe_',
video: 'oe_',
embed: 'oe_',
object: 'oe_',
track: 'oe_',
// the following cover the default case
'': 'mp_',
null: 'mp_',
undefined: 'mp_'
};
/**
* rewrite modifiers for <link href="URL" rel="x"> and or
* <link href="URL" rel="x" as="y"> expressed as a mapping of
* rel -> modifier or rel -> as -> modifier
* @type {Object}
*/
this.linkTagMods = {
linkRelToAs: {
import: this.linkAsTypes,
preload: this.linkAsTypes
},
stylesheet: 'cs_',
// the following cover the default case
null: 'mp_',
undefined: 'mp_',
'': 'mp_'
};
/**
* pre-computed modifiers for each tag
* @type {Object}
*/
this.tagToMod = {
A: { href: 'mp_' },
AREA: { href: 'mp_' },
AUDIO: { src: 'oe_', poster: 'im_' },
BASE: { href: 'mp_' },
EMBED: { src: 'oe_' },
FORM: { action: 'mp_' },
FRAME: { src: 'fr_' },
IFRAME: { src: 'if_' },
IMAGE: { href: 'im_', 'xlink:href': 'im_' },
IMG: { src: 'im_', srcset: 'im_' },
INPUT: { src: 'oe_' },
INS: { cite: 'mp_' },
META: { content: 'mp_' },
OBJECT: { data: 'oe_', codebase: 'oe_' },
Q: { cite: 'mp_' },
// covers both HTML and SVG script element,
SCRIPT: { src: 'js_', 'xlink:href': 'js_' },
SOURCE: { src: 'oe_', srcset: 'oe_' },
TRACK: { src: 'oe_' },
VIDEO: { src: 'oe_', poster: 'im_' },
image: { href: 'im_', 'xlink:href': 'im_' }
};
/** @type {Array<string>} */
this.URL_PROPS = [
'href',
'hash',
'pathname',
'host',
'hostname',
'protocol',
'origin',
'search',
'port'
];
/** @type {Object} */
this.wb_info = wbinfo;
/**
* custom options
* @type {Object}
*/
this.wb_opts = wbinfo.wombat_opts;
/** @type {string} */
this.wb_replay_prefix = wbinfo.prefix;
/** @type {boolean} */
this.wb_is_proxy = this.wb_info.proxy_magic || !this.wb_replay_prefix;
/** @type {string} */
this.wb_info.top_host = this.wb_info.top_host || '*';
/** @type {string} */
this.wb_curr_host =
$wbwindow.location.protocol + '//' + $wbwindow.location.host;
/** @type {Object} */
this.wb_info.wombat_opts = this.wb_info.wombat_opts || {};
/** @type {string} */
this.wb_orig_scheme = this.wb_info.wombat_scheme + '://';
/** @type {string} */
this.wb_orig_origin = this.wb_orig_scheme + this.wb_info.wombat_host;
/** @type {string} */
this.wb_abs_prefix = this.wb_replay_prefix;
/** @type {string} */
this.wb_capture_date_part = '';
if (!this.wb_info.is_live && this.wb_info.wombat_ts) {
this.wb_capture_date_part = '/' + this.wb_info.wombat_ts + '/';
}
/** @type {Array<string>} */
this.BAD_PREFIXES = [
'http:' + this.wb_replay_prefix,
'https:' + this.wb_replay_prefix,
'http:/' + this.wb_replay_prefix,
'https:/' + this.wb_replay_prefix
];
/** @type {RegExp} */
this.hostnamePortRe = /^[\w-]+(\.[\w-_]+)+(:\d+)(\/|$)/;
/** @type {RegExp} */
this.ipPortRe = /^\d+\.\d+\.\d+\.\d+(:\d+)?(\/|$)/;
/** @type {RegExp} */
this.workerBlobRe = /__WB_pmw\(.*?\)\.(?=postMessage\()/g;
/** @type {RegExp} */
this.rmCheckThisInjectRe = /_____WB\$wombat\$check\$this\$function_____\(.*?\)/g;
/** @type {RegExp} */
this.STYLE_REGEX = /(url\s*\(\s*[\\"']*)([^)'"]+)([\\"']*\s*\))/gi;
/** @type {RegExp} */
this.IMPORT_REGEX = /(@import\s*[\\"']*)([^)'";]+)([\\"']*\s*;?)/gi;
/** @type {RegExp} */
this.IMPORT_JS_REGEX = /^(import\s*\(['"]+)([^'"]+)(["'])/i;
/** @type {RegExp} */
this.no_wombatRe = /WB_wombat_/g;
/** @type {RegExp} */
this.srcsetRe = /\s*(\S*\s+[\d.]+[wx]),|(?:\s*,(?:\s+|(?=https?:)))/;
/** @type {RegExp} */
this.cookie_path_regex = /\bPath='?"?([^;'"\s]+)/i;
/** @type {RegExp} */
this.cookie_domain_regex = /\bDomain=([^;'"\s]+)/i;
/** @type {RegExp} */
this.cookie_expires_regex = /\bExpires=([^;'"]+)/gi;
/** @type {RegExp} */
this.SetCookieRe = /,(?![|])/;
/** @type {RegExp} */
this.IP_RX = /^(\d)+\.(\d)+\.(\d)+\.(\d)+$/;
/** @type {RegExp} */
this.FullHTMLRegex = /^\s*<(?:html|head|body|!doctype html)/i;
/** @type {RegExp} */
this.IsTagRegex = /^\s*</;
/** @type {RegExp} */
this.DotPostMessageRe = /(\.postMessage\s*\()/;
/** @type {RegExp} */
this.extractPageUnderModifierRE = /\/(?:[0-9]{14})?([a-z]{2, 3}_)\//;
/** @type {string} */
this.write_buff = '';
var eTargetProto = ($wbwindow.EventTarget || {}).prototype;
/** @type {Object} */
this.utilFns = {
cspViolationListener: function(e) {
console.group('CSP Violation');
console.log('Replayed Page URL', window.WB_wombat_location.href);
console.log('The documentURI', e.documentURI);
console.log('The blocked URL', e.blockedURI);
console.log('The directive violated', e.violatedDirective);
console.log('Our policy', e.originalPolicy);
if (e.sourceFile) {
var fileInfo = 'File: ' + e.sourceFile;
if (e.lineNumber && e.columnNumber) {
fileInfo += ' @ ' + e.lineNumber + ':' + e.columnNumber;
} else if (e.lineNumber) {
fileInfo += ' @ ' + e.lineNumber;
}
console.log(fileInfo);
}
console.groupEnd();
},
addEventListener: eTargetProto.addEventListener,
removeEventListener: eTargetProto.removeEventListener,
// some sites do funky things with the toString function
// (e.g. if used throw error or deny operation) hence we
// need a surefire and safe way to tell us what an object
// or function is hence Objects native toString
objToString: Object.prototype.toString,
wbSheetMediaQChecker: null,
XHRopen: null,
XHRsend: null
};
/**
* @type {{yesNo: boolean, added: boolean}}
*/
this.showCSPViolations = { yesNo: false, added: false };
autobind(this);
// this._addRemoveCSPViolationListener(true);
}
/**
* Performs the initialization of wombat's internals:
* - {@link initTopFrame}
* - {@link initWombatLoc}
* - {@link initWombatTop}
* - {@link initAutoFetchWorker}
* - initializes the wb_rel_prefix property
* - initializes the wb_unrewrite_rx property
* - if we are in framed replay mode and the wb_info mod is not bn_
* {@link initTopFrameNotify} is called
* @private
*/
Wombat.prototype._internalInit = function() {
this.initTopFrame(this.$wbwindow);
this.initWombatLoc(this.$wbwindow);
this.initWombatTop(this.$wbwindow);
// updated wb_unrewrite_rx for imgur.com
var wb_origin = this.$wbwindow.__WB_replay_top.location.origin;
var wb_host = this.$wbwindow.__WB_replay_top.location.host;
var wb_proto = this.$wbwindow.__WB_replay_top.location.protocol;
if (this.wb_replay_prefix && this.wb_replay_prefix.indexOf(wb_origin) === 0) {
this.wb_rel_prefix = this.wb_replay_prefix.substring(wb_origin.length);
} else {
this.wb_rel_prefix = this.wb_replay_prefix;
}
this.wb_prefixes = [this.wb_abs_prefix, this.wb_rel_prefix];
// make the protocol and host optional now
var rx =
'((' + wb_proto + ')?//' + wb_host + ')?' + this.wb_rel_prefix + '[^/]+/';
this.wb_unrewrite_rx = new RegExp(rx, 'g');
if (this.wb_info.is_framed && this.wb_info.mod !== 'bn_') {
this.initTopFrameNotify(this.wb_info);
}
this.initAutoFetchWorker();
};
/**
* Internal function that adds a "securitypolicyviolation" event listener
* to the document that will log any CSP violations in a nicer way than
* is the default
*
* If the yesNo argument is true, the event listener is added, otherwise
* it is removed
* @param {boolean} yesNo
* @private
*/
Wombat.prototype._addRemoveCSPViolationListener = function(yesNo) {
this.showCSPViolations.yesNo = yesNo;
if (this.showCSPViolations.yesNo && !this.showCSPViolations.added) {
this.showCSPViolations.added = true;
this._addEventListener(
document,
'securitypolicyviolation',
this.utilFns.cspViolationListener
);
} else {
this.showCSPViolations.added = false;
this._removeEventListener(
document,
'securitypolicyviolation',
this.utilFns.cspViolationListener
);
}
};
/**
* Adds the supplied event listener on the supplied event target
* @param {Object} obj
* @param {string} event
* @param {Function} fun
* @return {*}
* @private
*/
Wombat.prototype._addEventListener = function(obj, event, fun) {
if (this.utilFns.addEventListener) {
return this.utilFns.addEventListener.call(obj, event, fun);
}
obj.addEventListener(event, fun);
};
/**
* Removes the supplied event listener on the supplied event target
* @param {Object} obj
* @param {string} event
* @param {Function} fun
* @return {*}
* @private
*/
Wombat.prototype._removeEventListener = function(obj, event, fun) {
if (this.utilFns.removeEventListener) {
return this.utilFns.removeEventListener.call(obj, event, fun);
}
obj.removeEventListener(event, fun);
};
/**
* Extracts the modifier (i.e. mp\_, if\_, ...) the page is under that wombat is
* operating in. If extracting the modifier fails for some reason mp\_ is returned.
* Used to ensure the correct modifier is used for rewriting the service workers scope.
* @return {string}
*/
Wombat.prototype.getPageUnderModifier = function() {
try {
var pageUnderModifier = this.extractPageUnderModifierRE.exec(
location.pathname
);
if (pageUnderModifier && pageUnderModifier[1]) {
var mod = pageUnderModifier[1].trim();
return mod || 'mp_';
}
} catch (e) {}
return 'mp_';
};
/**
* Returns T/F indicating if the supplied function is a native function
* or not. The test checks for the presence of the substring `'[native code]'`
* in the result of calling `toString` on the function
* @param {Function} funToTest - The function to be tested
* @return {boolean}
*/
Wombat.prototype.isNativeFunction = function(funToTest) {
if (!funToTest || typeof funToTest !== 'function') return false;
var str = this.wb_funToString.call(funToTest);
if (str.indexOf('[native code]') == -1) {
return false;
}
if (funToTest.__WB_is_native_func__ !== undefined) {
return !!funToTest.__WB_is_native_func__;
}
return true;
};
/**
* Returns T/F indicating if the supplied argument is a string or not
* @param {*} arg
* @return {boolean}
*/
Wombat.prototype.isString = function(arg) {
return arg != null && Object.getPrototypeOf(arg) === String.prototype;
};
/**
* Create blob for content, convert to service-worker based blob URL
* set iframe to remove blob URL on unload
*
*/
Wombat.prototype.blobUrlForIframe = function(iframe, string) {
var blob = new Blob([string], {type: 'text/html'});
var url = this.URL.createObjectURL(blob);
var URL = this.URL;
iframe.__wb_blobSrc = url;
iframe.addEventListener('load', function() {
if (iframe.__wb_blobSrc) {
URL.revokeObjectURL(iframe.__wb_blobSrc);
iframe.__wb_blobSrc = null;
}
}, {once: true});
iframe.__wb_origSrc = iframe.src;
var blobIdUrl = url.slice(url.lastIndexOf('/') + 1) + '/' + this.wb_info.url;
iframe.src = this.wb_info.prefix + this.wb_info.request_ts + 'mp_/blob:' + blobIdUrl;
};
/**
* Returns T/F indicating if the supplied element may have attributes that
* are auto-fetched
* @param {Element} elem
* @return {boolean}
*/
Wombat.prototype.isSavedSrcSrcset = function(elem) {
switch (elem.tagName) {
case 'IMG':
case 'VIDEO':
case 'AUDIO':
return true;
case 'SOURCE':
if (!elem.parentElement) return false;
switch (elem.parentElement.tagName) {
case 'PICTURE':
case 'VIDEO':
case 'AUDIO':
return true;
default:
return false;
}
default:
return false;
}
};
/**
* Returns T/F indicating if the supplied element is an Image element that
* may have srcset values to be sent to the backing auto-fetch worker
* @param {Element} elem
* @return {boolean}
*/
Wombat.prototype.isSavedDataSrcSrcset = function(elem) {
if (elem.dataset && elem.dataset.srcset != null) {
return this.isSavedSrcSrcset(elem);
}
return false;
};
/**
* Determines if the supplied string is an host URL
* @param {string} str
* @return {boolean}
*/
Wombat.prototype.isHostUrl = function(str) {
// Good guess that's its a hostname
if (str.indexOf('www.') === 0) {
return true;
}
// hostname:port (port required)
var matches = str.match(this.hostnamePortRe);
if (matches && matches[0].length < 64) {
return true;
}
// ip:port
matches = str.match(this.ipPortRe);
if (matches) {
return matches[0].length < 64;
}
return false;
};
/**
* Returns T/F indicating if the supplied object is the arguments object
* @param {*} maybeArgumentsObj
* @return {boolean}
*/
Wombat.prototype.isArgumentsObj = function(maybeArgumentsObj) {
if (
!maybeArgumentsObj ||
!(typeof maybeArgumentsObj.toString === 'function')
) {
return false;
}
try {
return (
this.utilFns.objToString.call(maybeArgumentsObj) === '[object Arguments]'
);
} catch (e) {
return false;
}
};
/**
* Ensures that each element in the supplied arguments object or
* array is deproxied handling cases where we can not modify the
* supplied object returning a new or modified object with the
* exect elements/properties
* @param {*} maybeArgumentsObj
* @return {*}
*/
Wombat.prototype.deproxyArrayHandlingArgumentsObj = function(
maybeArgumentsObj
) {
if (
!maybeArgumentsObj ||
maybeArgumentsObj instanceof NodeList ||
!maybeArgumentsObj.length
) {
return maybeArgumentsObj;
}
var args = this.isArgumentsObj(maybeArgumentsObj)
? new Array(maybeArgumentsObj.length)
: maybeArgumentsObj;
for (var i = 0; i < maybeArgumentsObj.length; ++i) {
const res = this.proxyToObj(maybeArgumentsObj[i]);
if (res !== args[i]) {
args[i] = res;
}
}
return args;
};
/**
* Determines if a string starts with the supplied prefix.
* If it does the matching prefix is returned otherwise undefined.
* @param {?string} string
* @param {string} prefix
* @return {?string}
*/
Wombat.prototype.startsWith = function(string, prefix) {
if (!string) return undefined;
return string.indexOf(prefix) === 0 ? prefix : undefined;
};
/**
* Determines if a string starts with the supplied array of prefixes.
* If it does the matching prefix is returned otherwise undefined.
* @param {?string} string
* @param {Array<string>} prefixes
* @return {?string}
*/
Wombat.prototype.startsWithOneOf = function(string, prefixes) {
if (!string) return undefined;
for (var i = 0; i < prefixes.length; i++) {
if (string.indexOf(prefixes[i]) === 0) {
return prefixes[i];
}
}
return undefined;
};
/**
* Determines if a string ends with the supplied suffix.
* If it does the suffix is returned otherwise undefined.
* @param {?string} str
* @param {string} suffix
* @return {?string}
*/
Wombat.prototype.endsWith = function(str, suffix) {
if (!str) return undefined;
if (str.indexOf(suffix, str.length - suffix.length) !== -1) {
return suffix;
}
return undefined;
};
/**
* Returns T/F indicating if the supplied tag name and attribute name
* combination are to be rewritten
* @param {string} tagName
* @param {string} attr
* @return {boolean}
*/
Wombat.prototype.shouldRewriteAttr = function(tagName, attr) {
switch (attr) {
case 'href':
case 'src':
case 'xlink:href':
return true;
}
if (
tagName &&
this.tagToMod[tagName] &&
this.tagToMod[tagName][attr] !== undefined
) {
return true;
}
return (
(tagName === 'VIDEO' && attr === 'poster') ||
(tagName === 'META' && attr === 'content')
);
};
/**
* Returns T/F indicating if the script tag being rewritten should not
* have its text contents wrapped based on the supplied script type.
* @param {?string} scriptType
* @return {boolean}
*/
Wombat.prototype.skipWrapScriptBasedOnType = function(scriptType) {
if (!scriptType) return false;
if (scriptType.indexOf('javascript') >= 0 || scriptType.indexOf('ecmascript') >= 0) return false;
if (scriptType.indexOf('json') >= 0) return true;
if (scriptType.indexOf('text/') >= 0) return true;
return false;
};
/**
* Returns T/F indicating if the script tag being rewritten should not
* have its text contents wrapped based on heuristic analysis of its
* text contents.
* @param {?string} text
* @return {boolean}
*/
Wombat.prototype.skipWrapScriptTextBasedOnText = function(text) {
if (
!text ||
text.indexOf(this.WB_ASSIGN_FUNC) >= 0 ||
text.indexOf('<') === 0
) {
return true;
}
var override_props = [
'window',
'self',
'document',
'location',
'top',
'parent',
'frames',
'opener'
];
for (var i = 0; i < override_props.length; i++) {
if (text.indexOf(override_props[i]) >= 0) {
return false;
}
}
return true;
};
/**
* Returns T/F indicating if the supplied DOM Node has child Elements/Nodes.
* Note this function should be used when the Node(s) being considered can
* be null/undefined.
* @param {Node} node
* @return {boolean}
*/
Wombat.prototype.nodeHasChildren = function(node) {
if (!node) return false;
if (typeof node.hasChildNodes === 'function') return node.hasChildNodes();
var kids = node.children || node.childNodes;
if (kids) return kids.length > 0;
return false;
};
/**
* Returns the correct rewrite modifier for the supplied element and
* attribute combination if one exists otherwise mp_.
* Used by
* - {@link performAttributeRewrite}
* - {@link rewriteFrameSrc}
* - {@link initElementGetSetAttributeOverride}
* - {@link overrideHrefAttr}
*
* @param {*} elem
* @param {string} attrName
* @return {?string}
*/
Wombat.prototype.rwModForElement = function(elem, attrName) {
if (!elem) return undefined;
// the default modifier, if none is supplied to rewrite_url, is mp_
var mod = 'mp_';
if (elem.tagName === 'LINK' && attrName === 'href') {
// link types are always ASCII case-insensitive, and must be compared as such.
// https://html.spec.whatwg.org/multipage/links.html#linkTypes
if (elem.rel) {
var relV = elem.rel.trim().toLowerCase();
var asV = this.wb_getAttribute.call(elem, 'as');
if (asV && this.linkTagMods.linkRelToAs[relV] != null) {
var asMods = this.linkTagMods.linkRelToAs[relV];
mod = asMods[asV.toLowerCase()];
} else if (this.linkTagMods[relV] != null) {
mod = this.linkTagMods[relV];
}
}
} else {
// check if this element has an rewrite modifiers and set mod to it if it does
var maybeMod = this.tagToMod[elem.tagName];
if (maybeMod != null) {
mod = maybeMod[attrName];
}
}
return mod;
};
/**
* If the supplied element is a script tag and has the server-side rewrite added
* property "__wb_orig_src" it is removed and the "__$removedWBOSRC$__" property
* is added to element as an internal flag indicating no further checks are to be
* made.
*
* See also {@link retrieveWBOSRC}
* @param {Element} elem
*/
Wombat.prototype.removeWBOSRC = function(elem) {
if (elem.tagName === 'SCRIPT' && !elem.__$removedWBOSRC$__) {
if (elem.hasAttribute('__wb_orig_src')) {
elem.removeAttribute('__wb_orig_src');
}
elem.__$removedWBOSRC$__ = true;
}
};
/**
* If the supplied element is a script tag and has the server-side rewrite added
* property "__wb_orig_src" its value is returned otherwise undefined is returned.
* If the element did not have the "__wb_orig_src" property the
* "__$removedWBOSRC$__" property is added to element as an internal flag
* indicating no further checks are to be made.
*
* See also {@link removeWBOSRC}
* @param {Element} elem
* @return {?string}
*/
Wombat.prototype.retrieveWBOSRC = function(elem) {
if (elem.tagName === 'SCRIPT' && !elem.__$removedWBOSRC$__) {
var maybeWBOSRC;
if (this.wb_getAttribute) {
maybeWBOSRC = this.wb_getAttribute.call(elem, '__wb_orig_src');
} else {
maybeWBOSRC = elem.getAttribute('__wb_orig_src');
}
if (maybeWBOSRC == null) elem.__$removedWBOSRC$__ = true;
return maybeWBOSRC;
}
return undefined;
};
/**
* Wraps the supplied text contents of a script tag with the required Wombat setup
* @param {?string} scriptText
* @return {string}
*/
Wombat.prototype.wrapScriptTextJsProxy = function(scriptText) {
return (
'var _____WB$wombat$assign$function_____ = function(name) {return ' +
'(self._wb_wombat && self._wb_wombat.local_init && self._wb_wombat.local_init(name)) || self[name]; };\n' +
'if (!self.__WB_pmw) { self.__WB_pmw = function(obj) { ' +
'this.__WB_source = obj; return this; } }\n{\n' +
'let window = _____WB$wombat$assign$function_____("window");\n' +
'let globalThis = _____WB$wombat$assign$function_____("globalThis");\n' +
'let self = _____WB$wombat$assign$function_____("self");\n' +
'let document = _____WB$wombat$assign$function_____("document");\n' +
'let location = _____WB$wombat$assign$function_____("location");\n' +
'let top = _____WB$wombat$assign$function_____("top");\n' +
'let parent = _____WB$wombat$assign$function_____("parent");\n' +
'let frames = _____WB$wombat$assign$function_____("frames");\n' +
'let opener = _____WB$wombat$assign$function_____("opener");\n{\n' +
scriptText.replace(this.DotPostMessageRe, '.__WB_pmw(self.window)$1') +
'\n\n}}'
);
};
/**
* Calls the supplied function when the supplied element undergoes mutations
* @param elem
* @param func
* @return {boolean}
*/
Wombat.prototype.watchElem = function(elem, func) {
if (!this.$wbwindow.MutationObserver) {
return false;
}
var m = new this.$wbwindow.MutationObserver(function(records, observer) {
for (var i = 0; i < records.length; i++) {
var r = records[i];
if (r.type === 'childList') {
for (var j = 0; j < r.addedNodes.length; j++) {
func(r.addedNodes[j]);
}
}
}
});
m.observe(elem, {
childList: true,
subtree: true
});
};
/**
* Reconstructs the doctype string if the supplied doctype object
* is non null/undefined. This function is used by {@link rewriteHtmlFull}
* in order to ensure correctness of rewriting full string of HTML that
* started with <!doctype ...> since the innerHTML and outerHTML properties
* do not include that.
* @param {DocumentType} doctype
* @return {string}
*/
Wombat.prototype.reconstructDocType = function(doctype) {
if (doctype == null) return '';
return (
'<!doctype ' +
doctype.name +
(doctype.publicId ? ' PUBLIC "' + doctype.publicId + '"' : '') +
(!doctype.publicId && doctype.systemId ? ' SYSTEM' : '') +
(doctype.systemId ? ' "' + doctype.systemId + '"' : '') +
'>'
);
};
/**
* Constructs the final URL for the URL rewriting process
* @param {boolean} useRel
* @param {string} mod
* @param {string} url
* @return {string}
*/
Wombat.prototype.getFinalUrl = function(useRel, mod, url) {
var prefix = useRel ? this.wb_rel_prefix : this.wb_abs_prefix;
if (mod == null) {
mod = this.wb_info.mod;
}
// if live, don't add the timestamp
if (!this.wb_info.is_live) {
prefix += this.wb_info.wombat_ts;
}
prefix += mod;
if (prefix[prefix.length - 1] !== '/') {
prefix += '/';
}
return prefix + url;
};
/**
* Converts the supplied relative URL to an absolute URL using URL class
* @param {string} url
* @param {?Document} doc
* @return {string}
*/
Wombat.prototype.resolveRelUrl = function(url, doc) {
var wombat = this;
function isValidBaseURI(doc) {
if (!doc || !doc.baseURI) {
return false;
}
return (doc.baseURI.startsWith(wombat.HTTPS_PREFIX) || doc.baseURI.startsWith(wombat.HTTP_PREFIX));
}
var baseURI = null;
if (isValidBaseURI(doc)) {
baseURI = doc.baseURI;
} else if (isValidBaseURI(this.$wbwindow.document)) {
baseURI = this.$wbwindow.document.baseURI;
} else {
baseURI = this.$wbwindow.__WB_replay_top.document.baseURI;
}
return new this.URL(url, baseURI).href;
};
/**
* Extracts the original URL from the supplied rewritten URL
* @param {?string} rewrittenUrl
* @return {string}
*/
Wombat.prototype.extractOriginalURL = function(rewrittenUrl) {
if (!rewrittenUrl) {
return '';
} else if (this.wb_is_proxy) {
// proxy mode: no extraction needed
return rewrittenUrl;
}
var rwURLString = rewrittenUrl.toString();
var url = rwURLString;
// ignore certain urls
if (this.startsWithOneOf(url, this.IGNORE_PREFIXES)) {
return url;
}
if (url.startsWith(this.wb_info.static_prefix)) {
return url;
}
var start;
if (this.startsWith(url, this.wb_abs_prefix)) {
start = this.wb_abs_prefix.length;
} else if (this.wb_rel_prefix && this.startsWith(url, this.wb_rel_prefix)) {
start = this.wb_rel_prefix.length;
} else {
// if no coll, start from beginning, otherwise could be part of coll..
start = this.wb_rel_prefix ? 1 : 0;
}
var index = url.indexOf('/http', start);
if (index < 0) {
index = url.indexOf('///', start);
}
if (index < 0) {
index = url.indexOf('/blob:', start);
}
if (index < 0) {
index = url.indexOf('/about:blank', start);
}
// extract original url from wburl