socket.js

/** Socket.IO 0.6.2 - Built with build.js */
/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

var io = this.io = {
  version: '0.6.2',
  setPath: function(path){
    if (window.console && console.error) console.error('io.setPath will be removed. Please set the variable WEB_SOCKET_SWF_LOCATION pointing to WebSocketMain.swf');
    this.path = /\/$/.test(path) ? path : path + '/';
    WEB_SOCKET_SWF_LOCATION = path + 'lib/vendor/web-socket-js/WebSocketMain.swf';
  }
};

if ('jQuery' in this) jQuery.io = this.io;

if (typeof window != 'undefined'){
  // WEB_SOCKET_SWF_LOCATION = (document.location.protocol == 'https:' ? 'https:' : 'http:') + '//cdn.socket.io/' + this.io.version + '/WebSocketMain.swf';
  if (typeof WEB_SOCKET_SWF_LOCATION === 'undefined')
    WEB_SOCKET_SWF_LOCATION = '/socket.io/lib/vendor/web-socket-js/WebSocketMain.swf';
}

/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;

  var _pageLoaded = false;

  io.util = {

    ios: false,

    load: function(fn){
      if (/loaded|complete/.test(document.readyState) || _pageLoaded) return fn();
      if ('attachEvent' in window){
        window.attachEvent('onload', fn);
      } else {
        window.addEventListener('load', fn, false);
      }
    },

    inherit: function(ctor, superCtor){
      // no support for `instanceof` for now
      for (var i in superCtor.prototype){
        ctor.prototype[i] = superCtor.prototype[i];
      }
    },

    indexOf: function(arr, item, from){
      for (var l = arr.length, i = (from < 0) ? Math.max(0, l + from) : from || 0; i < l; i++){
        if (arr[i] === item) return i;
      }
      return -1;
    },

    isArray: function(obj){
      return Object.prototype.toString.call(obj) === '[object Array]';
    },
    
    merge: function(target, additional){
      for (var i in additional)
        if (additional.hasOwnProperty(i))
          target[i] = additional[i];
    }

  };

  io.util.ios = /iphone|ipad/i.test(navigator.userAgent);
  io.util.android = /android/i.test(navigator.userAgent);
  io.util.opera = /opera/i.test(navigator.userAgent);

  io.util.load(function(){
    _pageLoaded = true;
  });

})();

/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

// abstract

(function(){
  var io = this.io;
  
  var frame = '~m~',
  
  stringify = function(message){
    if (Object.prototype.toString.call(message) == '[object Object]'){
      if (!('JSON' in window)){
        if ('console' in window && console.error) console.error('Trying to encode as JSON, but JSON.stringify is missing.');
        return '{ "$error": "Invalid message" }';
      }
      return '~j~' + JSON.stringify(message);
    } else {
      return String(message);
    }
  };
  
  Transport = io.Transport = function(base, options){
    this.base = base;
    this.options = {
      timeout: 15000 // based on heartbeat interval default
    };
    io.util.merge(this.options, options);
  };

  Transport.prototype.send = function(){
    throw new Error('Missing send() implementation');
  };

  Transport.prototype.connect = function(){
    throw new Error('Missing connect() implementation');
  };

  Transport.prototype.disconnect = function(){
    throw new Error('Missing disconnect() implementation');
  };
  
  Transport.prototype._encode = function(messages){
    var ret = '', message,
        messages = io.util.isArray(messages) ? messages : [messages];
    for (var i = 0, l = messages.length; i < l; i++){
      message = messages[i] === null || messages[i] === undefined ? '' : stringify(messages[i]);
      ret += frame + message.length + frame + message;
    }
    return ret;
  };
  
  Transport.prototype._decode = function(data){
    var messages = [], number, n;
    do {
      if (data.substr(0, 3) !== frame) return messages;
      data = data.substr(3);
      number = '', n = '';
      for (var i = 0, l = data.length; i < l; i++){
        n = Number(data.substr(i, 1));
        if (data.substr(i, 1) == n){
          number += n;
        } else {    
          data = data.substr(number.length + frame.length);
          number = Number(number);
          break;
        } 
      }
      messages.push(data.substr(0, number)); // here
      data = data.substr(number);
    } while(data !== '');
    return messages;
  };
  
  Transport.prototype._onData = function(data){
    this._setTimeout();
    var msgs = this._decode(data);
    if (msgs && msgs.length){
      for (var i = 0, l = msgs.length; i < l; i++){
        this._onMessage(msgs[i]);
      }
    }
  };
  
  Transport.prototype._setTimeout = function(){
    var self = this;
    if (this._timeout) clearTimeout(this._timeout);
    this._timeout = setTimeout(function(){
      self._onTimeout();
    }, this.options.timeout);
  };
  
  Transport.prototype._onTimeout = function(){
    this._onDisconnect();
  };
  
  Transport.prototype._onMessage = function(message){
    if (!this.sessionid){
      this.sessionid = message;
      this._onConnect();
    } else if (message.substr(0, 3) == '~h~'){
      this._onHeartbeat(message.substr(3));
    } else if (message.substr(0, 3) == '~j~'){
      this.base._onMessage(JSON.parse(message.substr(3)));
    } else {
      this.base._onMessage(message);
    }
  },
  
  Transport.prototype._onHeartbeat = function(heartbeat){
    this.send('~h~' + heartbeat); // echo
  };
  
  Transport.prototype._onConnect = function(){
    this.connected = true;
    this.connecting = false;
    this.base._onConnect();
    this._setTimeout();
  };

  Transport.prototype._onDisconnect = function(){
    this.connecting = false;
    this.connected = false;
    this.sessionid = null;
    this.base._onDisconnect();
  };

  Transport.prototype._prepareUrl = function(){
    return (this.base.options.secure ? 'https' : 'http') 
      + '://' + this.base.host 
      + ':' + this.base.options.port
      + '/' + this.base.options.resource
      + '/' + this.type
      + (this.sessionid ? ('/' + this.sessionid) : '/');
  };

})();
/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;
  
  var empty = new Function,
      
  XMLHttpRequestCORS = (function(){
    if (!('XMLHttpRequest' in window)) return false;
    // CORS feature detection
    var a = new XMLHttpRequest();
    return a.withCredentials != undefined;
  })(),
  
  request = function(xdomain){
    if ('XDomainRequest' in window && xdomain) return new XDomainRequest();
    if ('XMLHttpRequest' in window && (!xdomain || XMLHttpRequestCORS)) return new XMLHttpRequest();
    if (!xdomain){
      try {
        var a = new ActiveXObject('MSXML2.XMLHTTP');
        return a;
      } catch(e){}
    
      try {
        var b = new ActiveXObject('Microsoft.XMLHTTP');
        return b;
      } catch(e){}
    }
    return false;
  },
  
  XHR = io.Transport.XHR = function(){
    io.Transport.apply(this, arguments);
    this._sendBuffer = [];
  };
  
  io.util.inherit(XHR, io.Transport);
  
  XHR.prototype.connect = function(){
    this._get();
    return this;
  };
  
  XHR.prototype._checkSend = function(){
    if (!this._posting && this._sendBuffer.length){
      var encoded = this._encode(this._sendBuffer);
      this._sendBuffer = [];
      this._send(encoded);
    }
  };
  
  XHR.prototype.send = function(data){
    if (io.util.isArray(data)){
      this._sendBuffer.push.apply(this._sendBuffer, data);
    } else {
      this._sendBuffer.push(data);
    }
    this._checkSend();
    return this;
  };
  
  XHR.prototype._send = function(data){
    var self = this;
    this._posting = true;
    this._sendXhr = this._request('send', 'POST');
    this._sendXhr.onreadystatechange = function(){
      var status;
      if (self._sendXhr.readyState == 4){
        self._sendXhr.onreadystatechange = empty;
        try { status = self._sendXhr.status; } catch(e){}
        self._posting = false;
        if (status == 200){
          self._checkSend();
        } else {
          self._onDisconnect();
        }
      }
    };
    this._sendXhr.send('data=' + encodeURIComponent(data));
  };
  
  XHR.prototype.disconnect = function(){
    // send disconnection signal
    this._onDisconnect();
    return this;
  };
  
  XHR.prototype._onDisconnect = function(){
    if (this._xhr){
      this._xhr.onreadystatechange = empty;
      try {
        this._xhr.abort();
      } catch(e){}
      this._xhr = null;
    }
    if (this._sendXhr){
      this._sendXhr.onreadystatechange = empty;
      try {
        this._sendXhr.abort();
      } catch(e){}
      this._sendXhr = null;
    }
    this._sendBuffer = [];
    io.Transport.prototype._onDisconnect.call(this);
  };
  
  XHR.prototype._request = function(url, method, multipart){
    var req = request(this.base._isXDomain());
    if (multipart) req.multipart = true;
    req.open(method || 'GET', this._prepareUrl() + (url ? '/' + url : ''));
    if (method == 'POST' && 'setRequestHeader' in req){
      req.setRequestHeader('Content-type', 'application/x-www-form-urlencoded; charset=utf-8');
    }
    return req;
  };
  
  XHR.check = function(xdomain){
    try {
      if (request(xdomain)) return true;
    } catch(e){}
    return false;
  };
  
  XHR.xdomainCheck = function(){
    return XHR.check(true);
  };
  
  XHR.request = request;
  
})();

/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;
  
  var WS = io.Transport.websocket = function(){
    io.Transport.apply(this, arguments);
  };
  
  io.util.inherit(WS, io.Transport);
  
  WS.prototype.type = 'websocket';
  
  WS.prototype.connect = function(){
    var self = this;
    this.socket = new WebSocket(this._prepareUrl());
    this.socket.onmessage = function(ev){ self._onData(ev.data); };
    this.socket.onclose = function(ev){ self._onClose(); };
    this.socket.onerror = function(e){ self._onError(e); };
    return this;
  };
  
  WS.prototype.send = function(data){
    if (this.socket) this.socket.send(this._encode(data));
    return this;
  };
  
  WS.prototype.disconnect = function(){
    if (this.socket) this.socket.close();
    return this;
  };
  
  WS.prototype._onClose = function(){
    this._onDisconnect();
    return this;
  };

  WS.prototype._onError = function(e){
    this.base.emit('error', [e]);
  };
  
  WS.prototype._prepareUrl = function(){
    return (this.base.options.secure ? 'wss' : 'ws') 
    + '://' + this.base.host 
    + ':' + this.base.options.port
    + '/' + this.base.options.resource
    + '/' + this.type
    + (this.sessionid ? ('/' + this.sessionid) : '');
  };
  
  WS.check = function(){
    // we make sure WebSocket is not confounded with a previously loaded flash WebSocket
    return 'WebSocket' in window && WebSocket.prototype && ( WebSocket.prototype.send && !!WebSocket.prototype.send.toString().match(/native/i)) && typeof WebSocket !== "undefined";
  };

  WS.xdomainCheck = function(){
    return true;
  };
  
})();

/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;
  
  var Flashsocket = io.Transport.flashsocket = function(){
    io.Transport.websocket.apply(this, arguments);
  };
  
  io.util.inherit(Flashsocket, io.Transport.websocket);
  
  Flashsocket.prototype.type = 'flashsocket';
  
  Flashsocket.prototype.connect = function(){
    var self = this, args = arguments;
    WebSocket.__addTask(function(){
      io.Transport.websocket.prototype.connect.apply(self, args);
    });
    return this;
  };
  
  Flashsocket.prototype.send = function(){
    var self = this, args = arguments;
    WebSocket.__addTask(function(){
      io.Transport.websocket.prototype.send.apply(self, args);
    });
    return this;
  };
  
  Flashsocket.check = function(){
    if (typeof WebSocket == 'undefined' || !('__addTask' in WebSocket)) return false;
    if (io.util.opera) return false; // opera is buggy with this transport
    if ('navigator' in window && 'plugins' in navigator && navigator.plugins['Shockwave Flash']){
      return !!navigator.plugins['Shockwave Flash'].description;
    }
    if ('ActiveXObject' in window) {
      try {
        return !!new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version');
      } catch (e) {}
    }
    return false;
  };
  
  Flashsocket.xdomainCheck = function(){
    return true;
  };
  
})();
/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;
  
  var HTMLFile = io.Transport.htmlfile = function(){
    io.Transport.XHR.apply(this, arguments);
  };
  
  io.util.inherit(HTMLFile, io.Transport.XHR);
  
  HTMLFile.prototype.type = 'htmlfile';
  
  HTMLFile.prototype._get = function(){
    var self = this;
    this._open();
    window.attachEvent('onunload', function(){ self._destroy(); });
  };
  
  HTMLFile.prototype._open = function(){
    this._doc = new ActiveXObject('htmlfile');
    this._doc.open();
    this._doc.write('<html></html>');
    this._doc.parentWindow.s = this;
    this._doc.close();

    var _iframeC = this._doc.createElement('div');
    this._doc.body.appendChild(_iframeC);
    this._iframe = this._doc.createElement('iframe');
    _iframeC.appendChild(this._iframe);
    this._iframe.src = this._prepareUrl() + '/' + (+ new Date);
  };
  
  HTMLFile.prototype._ = function(data, doc){
    this._onData(data);
    var script = doc.getElementsByTagName('script')[0];
    script.parentNode.removeChild(script);
  };

  HTMLFile.prototype._destroy = function(){
    if (this._iframe){
      this._iframe.src = 'about:blank';
      this._doc = null;
      CollectGarbage();
    }
  };
  
  HTMLFile.prototype.disconnect = function(){
    this._destroy();
    return io.Transport.XHR.prototype.disconnect.call(this);
  };
  
  HTMLFile.check = function(){
    if ('ActiveXObject' in window){
      try {
        var a = new ActiveXObject('htmlfile');
        return a && io.Transport.XHR.check();
      } catch(e){}
    }
    return false;
  };

  HTMLFile.xdomainCheck = function(){
    // we can probably do handling for sub-domains, we should test that it's cross domain but a subdomain here
    return false;
  };
  
})();
/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;
  
  var XHRMultipart = io.Transport['xhr-multipart'] = function(){
    io.Transport.XHR.apply(this, arguments);
  };
  
  io.util.inherit(XHRMultipart, io.Transport.XHR);
  
  XHRMultipart.prototype.type = 'xhr-multipart';
  
  XHRMultipart.prototype._get = function(){
    var self = this;
    this._xhr = this._request('', 'GET', true);
    this._xhr.onreadystatechange = function(){
      if (self._xhr.readyState == 4) self._onData(self._xhr.responseText);
    };
    this._xhr.send(null);
  };
  
  XHRMultipart.check = function(){
    return 'XMLHttpRequest' in window && 'prototype' in XMLHttpRequest && 'multipart' in XMLHttpRequest.prototype;
  };

  XHRMultipart.xdomainCheck = function(){
    return true;
  };
  
})();

/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;

  var empty = new Function(),

  XHRPolling = io.Transport['xhr-polling'] = function(){
    io.Transport.XHR.apply(this, arguments);
  };

  io.util.inherit(XHRPolling, io.Transport.XHR);

  XHRPolling.prototype.type = 'xhr-polling';

  XHRPolling.prototype.connect = function(){
    if (io.util.ios || io.util.android){
      var self = this;
      io.util.load(function(){
        setTimeout(function(){
          io.Transport.XHR.prototype.connect.call(self);
        }, 10);
      });
    } else {
      io.Transport.XHR.prototype.connect.call(this);
    }
  };

  XHRPolling.prototype._get = function(){
    var self = this;
    this._xhr = this._request(+ new Date, 'GET');
    this._xhr.onreadystatechange = function(){
      var status;
      if (self._xhr.readyState == 4){
        self._xhr.onreadystatechange = empty;
        try { status = self._xhr.status; } catch(e){}
        if (status == 200){
          self._onData(self._xhr.responseText);
          self._get();
        } else {
          self._onDisconnect();
        }
      }
    };
    this._xhr.send(null);
  };

  XHRPolling.check = function(){
    return io.Transport.XHR.check();
  };

  XHRPolling.xdomainCheck = function(){
    return io.Transport.XHR.xdomainCheck();
  };

})();

/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;
  
  io.JSONP = [];
  
  JSONPPolling = io.Transport['jsonp-polling'] = function(){
    io.Transport.XHR.apply(this, arguments);
    this._insertAt = document.getElementsByTagName('script')[0];
    this._index = io.JSONP.length;
    io.JSONP.push(this);
  };
  
  io.util.inherit(JSONPPolling, io.Transport['xhr-polling']);
  
  JSONPPolling.prototype.type = 'jsonp-polling';
  
  JSONPPolling.prototype._send = function(data){
    var self = this;
    if (!('_form' in this)){
      var form = document.createElement('FORM'),
        area = document.createElement('TEXTAREA'),
        id = this._iframeId = 'socket_io_iframe_' + this._index,
        iframe;
  
      form.style.position = 'absolute';
      form.style.top = '-1000px';
      form.style.left = '-1000px';
      form.target = id;
      form.method = 'POST';
      form.action = this._prepareUrl() + '/' + (+new Date) + '/' + this._index;
      area.name = 'data';
      form.appendChild(area);
      this._insertAt.parentNode.insertBefore(form, this._insertAt);
      document.body.appendChild(form);
  
      this._form = form;
      this._area = area;
    }
  
    function complete(){
      initIframe();
      self._posting = false;
      self._checkSend();
    };
  
    function initIframe(){
      if (self._iframe){
        self._form.removeChild(self._iframe);
      } 
  
      try {
        // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
        iframe = document.createElement('<iframe name="'+ self._iframeId +'">');
      } catch(e){
        iframe = document.createElement('iframe');
        iframe.name = self._iframeId;
      }
  
      iframe.id = self._iframeId;
  
      self._form.appendChild(iframe);
      self._iframe = iframe;
    };
  
    initIframe();
  
    this._posting = true;
    this._area.value = data;
  
    try {
      this._form.submit();
    } catch(e){}
  
    if (this._iframe.attachEvent){
      iframe.onreadystatechange = function(){
        if (self._iframe.readyState == 'complete') complete();
      };
    } else {
      this._iframe.onload = complete;
    }
  };
  
  JSONPPolling.prototype._get = function(){
    var self = this,
        script = document.createElement('SCRIPT');
    if (this._script){
      this._script.parentNode.removeChild(this._script);
      this._script = null;
    }
    script.async = true;
    script.src = this._prepareUrl() + '/' + (+new Date) + '/' + this._index;
    script.onerror = function(){
      self._onDisconnect();
    };
    this._insertAt.parentNode.insertBefore(script, this._insertAt);
    this._script = script;
  };
  
  JSONPPolling.prototype._ = function(){
    this._onData.apply(this, arguments);
    this._get();
    return this;
  };
  
  JSONPPolling.check = function(){
    return true;
  };
  
  JSONPPolling.xdomainCheck = function(){
    return true;
  };
})();
/**
 * Socket.IO client
 * 
 * @author Guillermo Rauch <guillermo@learnboost.com>
 * @license The MIT license.
 * @copyright Copyright (c) 2010 LearnBoost <dev@learnboost.com>
 */

(function(){
  var io = this.io;
  
  var Socket = io.Socket = function(host, options){
    this.host = host || document.domain;
    this.options = {
      secure: false,
      document: document,
      port: document.location.port || 80,
      resource: 'socket.io',
      transports: ['websocket', 'flashsocket', 'htmlfile', 'xhr-multipart', 'xhr-polling', 'jsonp-polling'],
      transportOptions: {
        'xhr-polling': {
          timeout: 25000 // based on polling duration default
        },
        'jsonp-polling': {
          timeout: 25000
        }
      },
      connectTimeout: 5000,
      reconnect: true,
      reconnectionDelay: 500,
      maxReconnectionAttempts: 10,
      tryTransportsOnConnectTimeout: true,
      rememberTransport: true
    };
    io.util.merge(this.options, options);
    this.connected = false;
    this.connecting = false;
    this._events = {};
    this.transport = this.getTransport();
    if (!this.transport && 'console' in window) console.error('No transport available');
  };
  
  Socket.prototype.getTransport = function(override){
    var transports = override || this.options.transports, match;
    if (this.options.rememberTransport && !override){
      match = this.options.document.cookie.match('(?:^|;)\\s*socketio=([^;]*)');
      if (match){
        this._rememberedTransport = true;
        transports = [decodeURIComponent(match[1])];
      }
    } 
    for (var i = 0, transport; transport = transports[i]; i++){
      if (io.Transport[transport] 
        && io.Transport[transport].check() 
        && (!this._isXDomain() || io.Transport[transport].xdomainCheck())){
        return new io.Transport[transport](this, this.options.transportOptions[transport] || {});
      }
    }
    return null;
  };
  
  Socket.prototype.connect = function(){
    if (this.transport && !this.connected){
      if (this.connecting) this.disconnect(true);
      this.connecting = true;
      this.emit('connecting', [this.transport.type]);
      this.transport.connect();
      if (this.options.connectTimeout){
        var self = this;
        this.connectTimeoutTimer = setTimeout(function(){
          if (!self.connected){
            self.disconnect(true);
            if (self.options.tryTransportsOnConnectTimeout && !self._rememberedTransport){
              if(!self._remainingTransports) self._remainingTransports = self.options.transports.slice(0);
              var transports = self._remainingTransports;
              while(transports.length > 0 && transports.splice(0,1)[0] != self.transport.type){}
              if(transports.length){
                self.transport = self.getTransport(transports);
                self.connect();
              }
            }
            if(!self._remainingTransports || self._remainingTransports.length == 0) self.emit('connect_failed');
          }
          if(self._remainingTransports && self._remainingTransports.length == 0) delete self._remainingTransports;
        }, this.options.connectTimeout);
      }
    }
    return this;
  };
  
  Socket.prototype.send = function(data){
    if (!this.transport || !this.transport.connected) return this._queue(data);
    this.transport.send(data);
    return this;
  };
  
  Socket.prototype.disconnect = function(reconnect){
    if (this.connectTimeoutTimer) clearTimeout(this.connectTimeoutTimer);
    if (!reconnect) this.options.reconnect = false;
    this.transport.disconnect();
    return this;
  };
  
  Socket.prototype.on = function(name, fn){
    if (!(name in this._events)) this._events[name] = [];
    this._events[name].push(fn);
    return this;
  };
  
  Socket.prototype.emit = function(name, args){
    if (name in this._events){
      var events = this._events[name].concat();
      for (var i = 0, ii = events.length; i < ii; i++)
        events[i].apply(this, args === undefined ? [] : args);
    }
    return this;
  };

  Socket.prototype.removeEvent = function(name, fn){
    if (name in this._events){
      for (var a = 0, l = this._events[name].length; a < l; a++)
        if (this._events[name][a] == fn) this._events[name].splice(a, 1);       
    }
    return this;
  };
  
  Socket.prototype._queue = function(message){
    if (!('_queueStack' in this)) this._queueStack = [];
    this._queueStack.push(message);
    return this;
  };
  
  Socket.prototype._doQueue = function(){
    if (!('_queueStack' in this) || !this._queueStack.length) return this;
    this.transport.send(this._queueStack);
    this._queueStack = [];
    return this;
  };
  
  Socket.prototype._isXDomain = function(){
    var locPort = window.location.port || 80;
    return this.host !== document.domain || this.options.port != locPort;
  };
  
  Socket.prototype._onConnect = function(){
    this.connected = true;
    this.connecting = false;
    this._doQueue();
    if (this.options.rememberTransport) this.options.document.cookie = 'socketio=' + encodeURIComponent(this.transport.type);
    this.emit('connect');
  };
  
  Socket.prototype._onMessage = function(data){
    this.emit('message', [data]);
  };
  
  Socket.prototype._onDisconnect = function(){
    var wasConnected = this.connected;
    this.connected = false;
    this.connecting = false;
    this._queueStack = [];
    if (wasConnected){
      this.emit('disconnect');
      if (this.options.reconnect && !this.reconnecting) this._onReconnect();
    }
  };
  
  Socket.prototype._onReconnect = function(){
    this.reconnecting = true;
    this.reconnectionAttempts = 0;
    this.reconnectionDelay = this.options.reconnectionDelay;
    
    var self = this
      , tryTransportsOnConnectTimeout = this.options.tryTransportsOnConnectTimeout
      , rememberTransport = this.options.rememberTransport;
    
    function reset(){
      if(self.connected) self.emit('reconnect',[self.transport.type,self.reconnectionAttempts]);
      self.removeEvent('connect_failed', maybeReconnect).removeEvent('connect', maybeReconnect);
      delete self.reconnecting;
      delete self.reconnectionAttempts;
      delete self.reconnectionDelay;
      delete self.reconnectionTimer;
      delete self.redoTransports;
      self.options.tryTransportsOnConnectTimeout = tryTransportsOnConnectTimeout;
      self.options.rememberTransport = rememberTransport;
      
      return;
    };
    
    function maybeReconnect(){
      if (!self.reconnecting) return;
      if (!self.connected){
        if (self.connecting && self.reconnecting) return self.reconnectionTimer = setTimeout(maybeReconnect, 1000);
        
        if (self.reconnectionAttempts++ >= self.options.maxReconnectionAttempts){
          if (!self.redoTransports){
            self.on('connect_failed', maybeReconnect);
            self.options.tryTransportsOnConnectTimeout = true;
            self.transport = self.getTransport(self.options.transports); // overwrite with all enabled transports
            self.redoTransports = true;
            self.connect();
          } else {
            self.emit('reconnect_failed');
            reset();
          }
        } else {
          self.reconnectionDelay *= 2; // exponential backoff
          self.connect();
          self.emit('reconnecting', [self.reconnectionDelay,self.reconnectionAttempts]);
          self.reconnectionTimer = setTimeout(maybeReconnect, self.reconnectionDelay);
        }
      } else {
        reset();
      }
    };
    this.options.tryTransportsOnConnectTimeout = false;
    this.reconnectionTimer = setTimeout(maybeReconnect, this.reconnectionDelay);
    
    this.on('connect', maybeReconnect);
  };

  Socket.prototype.fire = Socket.prototype.emit;
  Socket.prototype.addListener = Socket.prototype.addEvent = Socket.prototype.addEventListener = Socket.prototype.on;
  Socket.prototype.removeListener = Socket.prototype.removeEventListener = Socket.prototype.removeEvent;
  
})();
/*  SWFObject v2.2 <http://code.google.com/p/swfobject/> 
  is released under the MIT License <http://www.opensource.org/licenses/mit-license.php> 
*/
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// Copyright: Hiroshi Ichikawa <http://gimite.net/en/>
// License: New BSD License
// Reference: http://dev.w3.org/html5/websockets/
// Reference: http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol

(function() {
  
  if (window.WebSocket) return;

  var console = window.console;
  if (!console || !console.log || !console.error) {
    console = {log: function(){ }, error: function(){ }};
  }
  
  if (!swfobject.hasFlashPlayerVersion("10.0.0")) {
    console.error("Flash Player >= 10.0.0 is required.");
    return;
  }
  if (location.protocol == "file:") {
    console.error(
      "WARNING: web-socket-js doesn't work in file:///... URL " +
      "unless you set Flash Security Settings properly. " +
      "Open the page via Web server i.e. http://...");
  }

  /**
   * This class represents a faux web socket.
   * @param {string} url
   * @param {string} protocol
   * @param {string} proxyHost
   * @param {int} proxyPort
   * @param {string} headers
   */
  WebSocket = function(url, protocol, proxyHost, proxyPort, headers) {
    var self = this;
    self.__id = WebSocket.__nextId++;
    WebSocket.__instances[self.__id] = self;
    self.readyState = WebSocket.CONNECTING;
    self.bufferedAmount = 0;
    // Uses setTimeout() to make sure __createFlash() runs after the caller sets ws.onopen etc.
    // Otherwise, when onopen fires immediately, onopen is called before it is set.
    setTimeout(function() {
      WebSocket.__addTask(function() {
        WebSocket.__flash.create(
            self.__id, url, protocol, proxyHost || null, proxyPort || 0, headers || null);
      });
    }, 0);
  };

  /**
   * Send data to the web socket.
   * @param {string} data  The data to send to the socket.
   * @return {boolean}  True for success, false for failure.
   */
  WebSocket.prototype.send = function(data) {
    if (this.readyState == WebSocket.CONNECTING) {
      throw "INVALID_STATE_ERR: Web Socket connection has not been established";
    }
    // We use encodeURIComponent() here, because FABridge doesn't work if
    // the argument includes some characters. We don't use escape() here
    // because of this:
    // https://developer.mozilla.org/en/Core_JavaScript_1.5_Guide/Functions#escape_and_unescape_Functions
    // But it looks decodeURIComponent(encodeURIComponent(s)) doesn't
    // preserve all Unicode characters either e.g. "\uffff" in Firefox.
    // Note by wtritch: Hopefully this will not be necessary using ExternalInterface.  Will require
    // additional testing.
    var result = WebSocket.__flash.send(this.__id, encodeURIComponent(data));
    if (result < 0) { // success
      return true;
    } else {
      this.bufferedAmount += result;
      return false;
    }
  };

  /**
   * Close this web socket gracefully.
   */
  WebSocket.prototype.close = function() {
    if (this.readyState == WebSocket.CLOSED || this.readyState == WebSocket.CLOSING) {
      return;
    }
    this.readyState = WebSocket.CLOSING;
    WebSocket.__flash.close(this.__id);
  };

  /**
   * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
   *
   * @param {string} type
   * @param {function} listener
   * @param {boolean} useCapture !NB Not implemented yet
   * @return void
   */
  WebSocket.prototype.addEventListener = function(type, listener, useCapture) {
    if (!('__events' in this)) {
      this.__events = {};
    }
    if (!(type in this.__events)) {
      this.__events[type] = [];
      if ('function' == typeof this['on' + type]) {
        this.__events[type].defaultHandler = this['on' + type];
        this['on' + type] = this.__createEventHandler(this, type);
      }
    }
    this.__events[type].push(listener);
  };

  /**
   * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
   *
   * @param {string} type
   * @param {function} listener
   * @param {boolean} useCapture NB! Not implemented yet
   * @return void
   */
  WebSocket.prototype.removeEventListener = function(type, listener, useCapture) {
    if (!('__events' in this)) {
      this.__events = {};
    }
    if (!(type in this.__events)) return;
    for (var i = this.__events.length; i > -1; --i) {
      if (listener === this.__events[type][i]) {
        this.__events[type].splice(i, 1);
        break;
      }
    }
  };

  /**
   * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
   *
   * @param {WebSocketEvent} event
   * @return void
   */
  WebSocket.prototype.dispatchEvent = function(event) {
    if (!('__events' in this)) throw 'UNSPECIFIED_EVENT_TYPE_ERR';
    if (!(event.type in this.__events)) throw 'UNSPECIFIED_EVENT_TYPE_ERR';
  
    for (var i = 0, l = this.__events[event.type].length; i < l; ++ i) {
      this.__events[event.type][i](event);
      if (event.cancelBubble) break;
    }
  
    if (false !== event.returnValue &&
      'function' == typeof this.__events[event.type].defaultHandler)
    {
      this.__events[event.type].defaultHandler(event);
    }
  };

  /**
   * Handle an event from flash.  Do any websocket-specific
   * handling before passing the event off to the event handlers.
   * @param {Object} event
   */
  WebSocket.prototype.__handleEvent = function(event) {
    if ("readyState" in event) {
      this.readyState = event.readyState;
    }
  
    try {
      if (event.type == "open") {
        this.onopen && this.onopen();
      } else if (event.type == "close") {
        this.onclose && this.onclose();
      } else if (event.type == "error") {
        this.onerror && this.onerror(event);
      } else if (event.type == "message") {
        if (this.onmessage) {
          var data = decodeURIComponent(event.message);
          var e;
          if (window.MessageEvent && !window.opera) {
            e = document.createEvent("MessageEvent");
            e.initMessageEvent("message", false, false, data, null, null, window, null);
          } else {
            // IE and Opera, the latter one truncates the data parameter after any 0x00 bytes.
            e = {data: data};
          }
          this.onmessage(e);
        }
        
      } else {
        throw "unknown event type: " + event.type;
      }
    } catch (e) {
      console.error(e.toString());
    }
  };
  
  /**
   * @param {object} object
   * @param {string} type
   */
  WebSocket.prototype.__createEventHandler = function(object, type) {
    return function(data) {
      var event = new WebSocketEvent();
      event.initEvent(type, true, true);
      event.target = event.currentTarget = object;
      for (var key in data) {
        event[key] = data[key];
      }
      object.dispatchEvent(event, arguments);
    };
  };

  /**
   * Define the WebSocket readyState enumeration.
   */
  WebSocket.CONNECTING = 0;
  WebSocket.OPEN = 1;
  WebSocket.CLOSING = 2;
  WebSocket.CLOSED = 3;

  WebSocket.__flash = null;
  WebSocket.__instances = {};
  WebSocket.__tasks = [];
  WebSocket.__nextId = 0;
  
  /**
   * Loads WebSocketMain.swf and creates WebSocketMain object in Flash.
   */
  WebSocket.__initialize = function() {
    if (WebSocket.__flash) return;
    
    if (WebSocket.__swfLocation) {
      // For backword compatibility.
      window.WEB_SOCKET_SWF_LOCATION = WebSocket.__swfLocation;
    }
    if (!window.WEB_SOCKET_SWF_LOCATION) {
      console.error("[WebSocket] set WEB_SOCKET_SWF_LOCATION to location of WebSocketMain.swf");
      return;
    }
    var container = document.createElement("div");
    container.id = "webSocketContainer";
    // Hides Flash box. We cannot use display: none or visibility: hidden because it prevents
    // Flash from loading at least in IE. So we move it out of the screen at (-100, -100).
    // But this even doesn't work with Flash Lite (e.g. in Droid Incredible). So with Flash
    // Lite, we put it at (0, 0). This shows 1x1 box visible at left-top corner but this is
    // the best we can do as far as we know now.
    container.style.position = "absolute";
    if (WebSocket.__isFlashLite()) {
      container.style.left = "0px";
      container.style.top = "0px";
    } else {
      container.style.left = "-100px";
      container.style.top = "-100px";
    }
    var holder = document.createElement("div");
    holder.id = "webSocketFlash";
    container.appendChild(holder);
    document.body.appendChild(container);
    // See this article for hasPriority:
    // http://help.adobe.com/en_US/as3/mobile/WS4bebcd66a74275c36cfb8137124318eebc6-7ffd.html
    swfobject.embedSWF(
      WEB_SOCKET_SWF_LOCATION,
      "webSocketFlash",
      "1" /* width */,
      "1" /* height */,
      "10.0.0" /* SWF version */,
      null,
      null,
      {hasPriority: true, swliveconnect : true, allowScriptAccess: "always"},
      null,
      function(e) {
        if (!e.success) {
          console.error("[WebSocket] swfobject.embedSWF failed");
        }
      });
  };
  
  /**
   * Load a new flash security policy file.
   * @param {string} url
   */
  WebSocket.loadFlashPolicyFile = function(url){
    WebSocket.__addTask(function() {
      WebSocket.__flash.loadManualPolicyFile(url);
    });
  };

  /**
   * Called by flash to notify js that it's fully loaded and ready
   * for communication.
   */
  WebSocket.__onFlashInitialized = function() {
    // We need to set a timeout here to avoid round-trip calls
    // to flash during the initialization process.
    setTimeout(function() {
      WebSocket.__flash = document.getElementById("webSocketFlash");
      WebSocket.__flash.setCallerUrl(location.href);
      WebSocket.__flash.setDebug(!!window.WEB_SOCKET_DEBUG);
      for (var i = 0; i < WebSocket.__tasks.length; ++i) {
        WebSocket.__tasks[i]();
      }
      WebSocket.__tasks = [];
    }, 0);
  };
  
  /**
   * Called by flash to dispatch an event to a web socket.
   * @param {object} eventObj  A web socket event dispatched from flash.
   */
  WebSocket.__onFlashEvent = function() {
    setTimeout(function() {
      // Gets events using receiveEvents() instead of getting it from event object
      // of Flash event. This is to make sure to keep message order.
      // It seems sometimes Flash events don't arrive in the same order as they are sent.
      var events = WebSocket.__flash.receiveEvents();
      for (var i = 0; i < events.length; ++i) {
        WebSocket.__instances[events[i].webSocketId].__handleEvent(events[i]);
      }
    }, 0);
    return true;
  };
  
  // called from Flash
  WebSocket.__log = function(message) {
    console.log(decodeURIComponent(message));
  };
  
  // called from Flash
  WebSocket.__error = function(message) {
    console.error(decodeURIComponent(message));
  };
  
  WebSocket.__addTask = function(task) {
    if (WebSocket.__flash) {
      task();
    } else {
      WebSocket.__tasks.push(task);
    }
  };
  
  /**
   * Test if the browser is running flash lite.
   * @return {boolean} True if flash lite is running, false otherwise.
   */
  WebSocket.__isFlashLite = function() {
    if (!window.navigator || !window.navigator.mimeTypes) {
      return false;
    }
    var mimeType = window.navigator.mimeTypes["application/x-shockwave-flash"];
    if (!mimeType || !mimeType.enabledPlugin || !mimeType.enabledPlugin.filename) {
      return false;
    }
    return mimeType.enabledPlugin.filename.match(/flashlite/i) ? true : false;
  };
  
  /**
   * Basic implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface">DOM 2 EventInterface</a>}
   *
   * @class
   * @constructor
   */
  function WebSocketEvent(){}
  
  /**
   *
   * @type boolean
   */
  WebSocketEvent.prototype.cancelable = true;
  
  /**
  *
  * @type boolean
  */
  WebSocketEvent.prototype.cancelBubble = false;
  
  /**
  *
  * @return void
  */
  WebSocketEvent.prototype.preventDefault = function() {
    if (this.cancelable) {
      this.returnValue = false;
    }
  };
  
  /**
  *
  * @return void
  */
  WebSocketEvent.prototype.stopPropagation = function() {
    this.cancelBubble = true;
  };

  /**
  *
  * @param {string} eventTypeArg
  * @param {boolean} canBubbleArg
  * @param {boolean} cancelableArg
  * @return void
  */
  WebSocketEvent.prototype.initEvent = function(eventTypeArg, canBubbleArg, cancelableArg) {
    this.type = eventTypeArg;
    this.cancelable = cancelableArg;
    this.timeStamp = new Date();
  };

  if (!window.WEB_SOCKET_DISABLE_AUTO_INITIALIZATION) {
    if (window.addEventListener) {
      window.addEventListener("load", function(){
        WebSocket.__initialize();
      }, false);
    } else {
      window.attachEvent("onload", function(){
        WebSocket.__initialize();
      });
    }
  }
  
})();