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net_uv.js
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net_uv.js
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var events = require('events');
var stream = require('stream');
var timers = require('timers');
var util = require('util');
var assert = require('assert');
var TCP = process.binding('tcp_wrap').TCP;
var debug;
if (process.env.NODE_DEBUG && /net/.test(process.env.NODE_DEBUG)) {
debug = function(x) { console.error('NET:', x); };
} else {
debug = function() { };
}
exports.createServer = function() {
return new Server(arguments[0], arguments[1]);
};
exports.connect = exports.createConnection = function(port, host) {
var s = new Socket();
s.connect(port, host);
return s;
};
function Socket(options) {
if (!(this instanceof Socket)) return new Socket(options);
stream.Stream.call(this);
// private
if (options && options.handle) {
this._handle = options.handle;
} else {
this._handle = new TCP();
}
this._handle.socket = this;
this._handle.onread = onread;
this._writeRequests = [];
}
util.inherits(Socket, stream.Stream);
Socket.prototype.setTimeout = function(msecs, callback) {
if (msecs > 0) {
timers.enroll(this, msecs);
if (typeof this.fd === 'number') { timers.active(this); }
if (callback) {
this.once('timeout', callback);
}
} else if (msecs === 0) {
timers.unenroll(this);
}
};
Socket.prototype.setNoDelay = function() {
/* TODO implement me */
};
Object.defineProperty(Socket.prototype, 'readyState', {
get: function() {
if (this._connecting) {
return 'opening';
} else if (this.readable && this.writable) {
assert(typeof this.fd === 'number');
return 'open';
} else if (this.readable && !this.writable) {
assert(typeof this.fd === 'number');
return 'readOnly';
} else if (!this.readable && this.writable) {
assert(typeof this.fd === 'number');
return 'writeOnly';
} else {
assert(typeof this.fd !== 'number');
return 'closed';
}
}
});
Object.defineProperty(Socket.prototype, 'bufferSize', {
get: function() {
return this._handle.writeQueueSize;
}
});
Socket.prototype.pause = function() {
this._handle.readStop();
};
Socket.prototype.resume = function() {
this._handle.readStart();
};
Socket.prototype.end = function() {
throw new Error("implement me");
};
Socket.prototype.destroySoon = function() {
throw new Error("implement me");
};
Socket.prototype.destroy = function(exception) {
var self = this;
debug('destroy ' + this.fd);
this.readable = this.writable = false;
timers.unenroll(this);
if (this.server && !this.destroyed) {
this.server.connections--;
}
debug('close ' + this.fd);
this._handle.close();
process.nextTick(function() {
if (exception) self.emit('error', exception);
self.emit('close', exception ? true : false);
});
this.destroyed = true;
};
function onread(buffer, offset, length) {
var handle = this;
var self = handle.socket;
assert.equal(handle, self._handle);
timers.active(self);
var end = offset + length;
if (buffer) {
// Emit 'data' event.
if (self._decoder) {
// Emit a string.
var string = self._decoder.write(buffer.slice(offset, end));
if (string.length) self.emit('data', string);
} else {
// Emit a slice. Attempt to avoid slicing the buffer if no one is
// listening for 'data'.
if (self._events && self._events['data']) {
self.emit('data', buffer.slice(offset, end));
}
}
// Optimization: emit the original buffer with end points
if (self.ondata) self.ondata(buffer, offset, end);
} else {
// EOF
self.readable = false;
if (!self.writable) self.destroy();
// Note: 'close' not emitted until nextTick.
if (!self.allowHalfOpen) self.end();
if (self._events && self._events['end']) self.emit('end');
if (self.onend) self.onend();
}
}
Socket.prototype.setEncoding = function(encoding) {
var StringDecoder = require('string_decoder').StringDecoder; // lazy load
this._decoder = new StringDecoder(encoding);
};
Socket.prototype.write = function(data /* [encoding], [fd], [cb] */) {
var encoding, fd, cb;
// parse arguments
if (typeof arguments[1] == 'string') {
encoding = arguments[1];
if (typeof arguments[2] == 'number') {
fd = arguments[2];
cb = arguments[3];
} else {
cb = arguments[2];
}
} else if (typeof arguments[1] == 'number') {
fd = arguments[1];
cb = arguments[2];
} else if (typeof arguments[2] == 'number') {
// This case is to support old calls when the encoding argument
// was not optional: s.write(buf, undefined, pipeFDs[1])
encoding = arguments[1];
fd = arguments[2];
cb = arguments[3];
} else {
cb = arguments[1];
}
// Change strings to buffers. SLOW
if (typeof data == 'string') {
data = new Buffer(data, encoding);
}
var writeReq = this._handle.write(data);
writeReq.oncomplete = afterWrite;
writeReq.cb = cb;
this._writeRequests.push(writeReq);
return this._handle.writeQueueSize == 0;
};
function afterWrite(status, handle, req, buffer) {
var self = handle.socket;
// TODO check status.
var req_ = self._writeRequests.shift();
assert.equal(req, req_);
if (req.cb) req.cb();
}
Socket.prototype.connect = function(port, host) {
var self = this;
timers.active(this);
require('dns').lookup(host, function(err, ip, addressType) {
if (err) {
self.emit('error', err);
} else {
timers.active(self);
if (addressType != 4) {
throw new Error("ipv6 addresses not yet supported by libuv");
}
ip = ip || '127.0.0.1';
self.remoteAddress = ip;
self.remotePort = port;
// TODO retrun promise from Socket.prototype.connect which
// wraps _connectReq.
assert.ok(!self._connectReq);
self._connectReq = self._handle.connect(ip, port);
if (self._connectReq) {
self._connectReq.oncomplete = afterConnect;
} else {
self.destroy(errnoException(errno, 'connect'));
}
}
});
};
function afterConnect(status, handle, req) {
var self = handle.socket;
assert.equal(handle, self._handle);
if (status == 0) {
self.readable = self.writable = true;
timers.active(self);
handle.readStart();
self.emit('connect');
} else {
self.destroy(errnoException(errno, 'connect'));
}
}
function errnoException(errorno, syscall) {
// TODO make this more compatible with ErrnoException from src/node.cc
// Once all of Node is using this function the ErrnoException from
// src/node.cc should be removed.
var e = new Error(syscall + ' ' + errorno);
e.errno = errorno;
e.syscall = syscall;
return e;
}
function Server(/* [ options, ] listener */) {
if (!(this instanceof Server)) return new Server(arguments[0], arguments[1]);
events.EventEmitter.call(this);
var self = this;
var options, listenerCallback;
if (typeof arguments[0] == 'function') {
options = {};
listenerCallback = arguments[0];
} else {
options = arguments[0];
if (typeof arguments[1] == 'function') {
listenerCallback = arguments[1];
}
}
this.on('connection', listenerCallback);
this.connections = 0;
self.allowHalfOpen = options.allowHalfOpen || false;
this._handle = new TCP();
this._handle.socket = this;
this._handle.onconnection = onconnection;
}
util.inherits(Server, events.EventEmitter);
exports.Server = Server;
function toPort(x) { return (x = Number(x)) >= 0 ? x : false; }
Server.prototype.listen = function() {
var self = this;
var lastArg = arguments[arguments.length - 1];
if (typeof lastArg == 'function') {
self.addListener('listening', lastArg);
}
var port = toPort(arguments[0]);
if (arguments.length == 0 || typeof arguments[0] == 'function') {
// Don't bind(). OS will assign a port with INADDR_ANY.
// The port can be found with server.address()
this._handle.listen(self._backlog || 128);
this.emit('listening');
} else {
// the first argument is the port, the second an IP
require('dns').lookup(arguments[1], function(err, ip, addressType) {
if (err) {
self.emit('error', err);
} else {
if (addressType != 4) {
throw new Error("ipv6 addresses not yet supported by libuv");
}
var r = self._handle.bind(ip || '0.0.0.0', port);
if (r) {
self.emit('error', errnoException(errno, 'listen'));
} else {
self._handle.listen(self._backlog || 128);
self.emit('listening');
}
}
});
}
};
function onconnection(clientHandle) {
var handle = this;
var self = handle.socket;
var socket = new Socket({ handle: clientHandle });
socket.readable = socket.writable = true;
socket.resume();
self.connections++;
socket.server = self;
DTRACE_NET_SERVER_CONNECTION(socket);
self.emit('connection', socket);
}