/js/lib/Socket.IO-node/support/socket.io-client/lib/transports/websocket.js

 1/**
 2 * Socket.IO client
 3 * 
 4 * @author Guillermo Rauch <guillermo@learnboost.com>
 5 * @license The MIT license.
 6 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 7 */
 8
 9(function(){
10	var io = this.io;
11	
12	var WS = io.Transport.websocket = function(){
13		io.Transport.apply(this, arguments);
14	};
15	
16	io.util.inherit(WS, io.Transport);
17	
18	WS.prototype.type = 'websocket';
19	
20	WS.prototype.connect = function(){
21		var self = this;
22		this.socket = new WebSocket(this._prepareUrl());
23		this.socket.onmessage = function(ev){ self._onData(ev.data); };
24		this.socket.onclose = function(ev){ self._onClose(); };
25    this.socket.onerror = function(e){ self._onError(e); };
26		return this;
27	};
28	
29	WS.prototype.send = function(data){
30		if (this.socket) this.socket.send(this._encode(data));
31		return this;
32	};
33	
34	WS.prototype.disconnect = function(){
35		if (this.socket) this.socket.close();
36		return this;
37	};
38	
39	WS.prototype._onClose = function(){
40		this._onDisconnect();
41		return this;
42	};
43
44  WS.prototype._onError = function(e){
45    this.base.emit('error', [e]);
46  };
47	
48	WS.prototype._prepareUrl = function(){
49		return (this.base.options.secure ? 'wss' : 'ws') 
50		+ '://' + this.base.host 
51		+ ':' + this.base.options.port
52		+ '/' + this.base.options.resource
53		+ '/' + this.type
54		+ (this.sessionid ? ('/' + this.sessionid) : '');
55	};
56	
57	WS.check = function(){
58		// we make sure WebSocket is not confounded with a previously loaded flash WebSocket
59		return 'WebSocket' in window && WebSocket.prototype && ( WebSocket.prototype.send && !!WebSocket.prototype.send.toString().match(/native/i)) && typeof WebSocket !== "undefined";
60	};
61
62	WS.xdomainCheck = function(){
63		return true;
64	};
65	
66})();