text: /*
   * Copyright 2013-2018 the original author or authors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  // JSON2 by Douglas Crockford (minified).
  var JSON;JSON||(JSON={}),function(){function str(a,b){var c,d,e,f,g=gap,h,i=b[a];i&&typeof i=="object"&&typeof i.toJSON=="function"&&(i=i.toJSON(a)),typeof rep=="function"&&(i=rep.call(b,a,i));switch(typeof i){case"string":return quote(i);case"number":return isFinite(i)?String(i):"null";case"boolean":case"null":return String(i);case"object":if(!i)return"null";gap+=indent,h=[];if(Object.prototype.toString.apply(i)==="[object Array]"){f=i.length;for(c=0;c<f;c+=1)h[c]=str(c,i)||"null";e=h.length===0?"[]":gap?"[\n"+gap+h.join(",\n"+gap)+"\n"+g+"]":"["+h.join(",")+"]",gap=g;return e}if(rep&&typeof rep=="object"){f=rep.length;for(c=0;c<f;c+=1)typeof rep[c]=="string"&&(d=rep[c],e=str(d,i),e&&h.push(quote(d)+(gap?": ":":")+e))}else for(d in i)Object.prototype.hasOwnProperty.call(i,d)&&(e=str(d,i),e&&h.push(quote(d)+(gap?": ":":")+e));e=h.length===0?"{}":gap?"{\n"+gap+h.join(",\n"+gap)+"\n"+g+"}":"{"+h.join(",")+"}",gap=g;return e}}function quote(a){escapable.lastIndex=0;return escapable.test(a)?'"'+a.replace(escapable,function(a){var b=meta[a];return typeof b=="string"?b:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+a+'"'}function f(a){return a<10?"0"+a:a}"use strict",typeof Date.prototype.toJSON!="function"&&(Date.prototype.toJSON=function(a){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null},String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(a){return this.valueOf()});var cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,gap,indent,meta={"\b":"\\b","\t":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"},rep;typeof JSON.stringify!="function"&&(JSON.stringify=function(a,b,c){var d;gap="",indent="";if(typeof c=="number")for(d=0;d<c;d+=1)indent+=" ";else typeof c=="string"&&(indent=c);rep=b;if(!b||typeof b=="function"||typeof b=="object"&&typeof b.length=="number")return str("",{"":a});throw new Error("JSON.stringify")}),typeof JSON.parse!="function"&&(JSON.parse=function(text,reviver){function walk(a,b){var c,d,e=a[b];if(e&&typeof e=="object")for(c in e)Object.prototype.hasOwnProperty.call(e,c)&&(d=walk(e,c),d!==undefined?e[c]=d:delete e[c]);return reviver.call(a,b,e)}var j;text=String(text),cx.lastIndex=0,cx.test(text)&&(text=text.replace(cx,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)}));if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,""))){j=eval("("+text+")");return typeof reviver=="function"?walk({"":j},""):j}throw new SyntaxError("JSON.parse")})}()
  
  
  //     [*] Including lib/index.js
  // Public object
  SockJS = (function(){
                var _document = document;
                var _window = window;
                var utils = {};
  
  
  //         [*] Including lib/reventtarget.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  /* Simplified implementation of DOM2 EventTarget.
   *   http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget
   */
  var REventTarget = function() {};
  REventTarget.prototype.addEventListener = function (eventType, listener) {
      if(!this._listeners) {
           this._listeners = {};
      }
      if(!(eventType in this._listeners)) {
          this._listeners[eventType] = [];
      }
      var arr = this._listeners[eventType];
      if(utils.arrIndexOf(arr, listener) === -1) {
          arr.push(listener);
      }
      return;
  };
  
  REventTarget.prototype.removeEventListener = function (eventType, listener) {
      if(!(this._listeners && (eventType in this._listeners))) {
          return;
      }
      var arr = this._listeners[eventType];
      var idx = utils.arrIndexOf(arr, listener);
      if (idx !== -1) {
          if(arr.length > 1) {
              this._listeners[eventType] = arr.slice(0, idx).concat( arr.slice(idx+1) );
          } else {
              delete this._listeners[eventType];
          }
          return;
      }
      return;
  };
  
  REventTarget.prototype.dispatchEvent = function (event) {
      var t = event.type;
      var args = Array.prototype.slice.call(arguments, 0);
      if (this['on'+t]) {
          this['on'+t].apply(this, args);
      }
      if (this._listeners && t in this._listeners) {
          for(var i=0; i < this._listeners[t].length; i++) {
              this._listeners[t][i].apply(this, args);
          }
      }
  };
  //         [*] End of lib/reventtarget.js
  
  
  //         [*] Including lib/simpleevent.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var SimpleEvent = function(type, obj) {
      this.type = type;
      if (typeof obj !== 'undefined') {
          for(var k in obj) {
              if (!obj.hasOwnProperty(k)) continue;
              this[k] = obj[k];
          }
      }
  };
  
  SimpleEvent.prototype.toString = function() {
      var r = [];
      for(var k in this) {
          if (!this.hasOwnProperty(k)) continue;
          var v = this[k];
          if (typeof v === 'function') v = '[function]';
          r.push(k + '=' + v);
      }
      return 'SimpleEvent(' + r.join(', ') + ')';
  };
  //         [*] End of lib/simpleevent.js
  
  
  //         [*] Including lib/eventemitter.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var EventEmitter = function(events) {
      var that = this;
      that._events = events || [];
      that._listeners = {};
  };
  EventEmitter.prototype.emit = function(type) {
      var that = this;
      that._verifyType(type);
      if (that._nuked) return;
  
      var args = Array.prototype.slice.call(arguments, 1);
      if (that['on'+type]) {
          that['on'+type].apply(that, args);
      }
      if (type in that._listeners) {
          for(var i = 0; i < that._listeners[type].length; i++) {
              that._listeners[type][i].apply(that, args);
          }
      }
  };
  
  EventEmitter.prototype.on = function(type, callback) {
      var that = this;
      that._verifyType(type);
      if (that._nuked) return;
  
      if (!(type in that._listeners)) {
          that._listeners[type] = [];
      }
      that._listeners[type].push(callback);
  };
  
  EventEmitter.prototype._verifyType = function(type) {
      var that = this;
      if (utils.arrIndexOf(that._events, type) === -1) {
          utils.log('Event ' + JSON.stringify(type) +
                    ' not listed ' + JSON.stringify(that._events) +
                    ' in ' + that);
      }
  };
  
  EventEmitter.prototype.nuke = function() {
      var that = this;
      that._nuked = true;
      for(var i=0; i<that._events.length; i++) {
          delete that[that._events[i]];
      }
      that._listeners = {};
  };
  //         [*] End of lib/eventemitter.js
  
  
  //         [*] Including lib/utils.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var random_string_chars = 'abcdefghijklmnopqrstuvwxyz0123456789_';
  utils.random_string = function(length, max) {
      max = max || random_string_chars.length;
      var i, ret = [];
      for(i=0; i < length; i++) {
          ret.push( random_string_chars.substr(Math.floor(Math.random() * max),1) );
      }
      return ret.join('');
  };
  utils.random_number = function(max) {
      return Math.floor(Math.random() * max);
  };
  utils.random_number_string = function(max) {
      var t = (''+(max - 1)).length;
      var p = Array(t+1).join('0');
      return (p + utils.random_number(max)).slice(-t);
  };
  
  // Assuming that url looks like: http://asdasd:111/asd
  utils.getOrigin = function(url) {
      url += '/';
      var parts = url.split('/').slice(0, 3);
      return parts.join('/');
  };
  
  utils.isSameOriginUrl = function(url_a, url_b) {
      // location.origin would do, but it's not always available.
      if (!url_b) url_b = _window.location.href;
  
      return (url_a.split('/').slice(0,3).join('/')
                  ===
              url_b.split('/').slice(0,3).join('/'));
  };
  
  utils.getParentDomain = function(url) {
      // ipv4 ip address
      if (/^[0-9.]*$/.test(url)) return url;
      // ipv6 ip address
      if (/^\[/.test(url)) return url;
      // no dots
      if (!(/[.]/.test(url))) return url;
  
      var parts = url.split('.').slice(1);
      return parts.join('.');
  };
  
  utils.objectExtend = function(dst, src) {
      for(var k in src) {
          if (src.hasOwnProperty(k)) {
              dst[k] = src[k];
          }
      }
      return dst;
  };
  
  var WPrefix = '_jp';
  
  utils.polluteGlobalNamespace = function() {
      if (!(WPrefix in _window)) {
          _window[WPrefix] = {};
      }
  };
  
  utils.closeFrame = function (code, reason) {
      return 'c'+JSON.stringify([code, reason]);
  };
  
  utils.userSetCode = function (code) {
      return code === 1000 || (code >= 3000 && code <= 4999);
  };
  
  // See: http://www.erg.abdn.ac.uk/~gerrit/dccp/notes/ccid2/rto_estimator/
  // and RFC 2988.
  utils.countRTO = function (rtt) {
      var rto;
      if (rtt > 100) {
          rto = 3 * rtt; // rto > 300msec
      } else {
          rto = rtt + 200; // 200msec < rto <= 300msec
      }
      return rto;
  }
  
  utils.log = function() {
      if (_window.console && console.log && console.log.apply) {
          console.log.apply(console, arguments);
      }
  };
  
  utils.bind = function(fun, that) {
      if (fun.bind) {
          return fun.bind(that);
      } else {
          return function() {
              return fun.apply(that, arguments);
          };
      }
  };
  
  utils.flatUrl = function(url) {
      return url.indexOf('?') === -1 && url.indexOf('#') === -1;
  };
  
  utils.amendUrl = function(url) {
      var dl = _document.location;
      if (!url) {
          throw new Error('Wrong url for SockJS');
      }
      if (!utils.flatUrl(url)) {
          throw new Error('Only basic urls are supported in SockJS');
      }
  
      //  '//abc' --> 'http://abc'
      if (url.indexOf('//') === 0) {
          url = dl.protocol + url;
      }
      // '/abc' --> 'http://localhost:80/abc'
      if (url.indexOf('/') === 0) {
          url = dl.protocol + '//' + dl.host + url;
      }
      // strip trailing slashes
      url = url.replace(/[/]+$/,'');
      return url;
  };
  
  // IE doesn't support [].indexOf.
  utils.arrIndexOf = function(arr, obj){
      for(var i=0; i < arr.length; i++){
          if(arr[i] === obj){
              return i;
          }
      }
      return -1;
  };
  
  utils.arrSkip = function(arr, obj) {
      var idx = utils.arrIndexOf(arr, obj);
      if (idx === -1) {
          return arr.slice();
      } else {
          var dst = arr.slice(0, idx);
          return dst.concat(arr.slice(idx+1));
      }
  };
  
  // Via: https://gist.github.com/1133122/2121c601c5549155483f50be3da5305e83b8c5df
  utils.isArray = Array.isArray || function(value) {
      return {}.toString.call(value).indexOf('Array') >= 0
  };
  
  utils.delay = function(t, fun) {
      if(typeof t === 'function') {
          fun = t;
          t = 0;
      }
      return setTimeout(fun, t);
  };
  
  
  // Chars worth escaping, as defined by Douglas Crockford:
  //   https://github.com/douglascrockford/JSON-js/blob/47a9882cddeb1e8529e07af9736218075372b8ac/json2.js#L196
  var json_escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
      json_lookup = {
  "\u0000":"\\u0000","\u0001":"\\u0001","\u0002":"\\u0002","\u0003":"\\u0003",
  "\u0004":"\\u0004","\u0005":"\\u0005","\u0006":"\\u0006","\u0007":"\\u0007",
  "\b":"\\b","\t":"\\t","\n":"\\n","\u000b":"\\u000b","\f":"\\f","\r":"\\r",
  "\u000e":"\\u000e","\u000f":"\\u000f","\u0010":"\\u0010","\u0011":"\\u0011",
  "\u0012":"\\u0012","\u0013":"\\u0013","\u0014":"\\u0014","\u0015":"\\u0015",
  "\u0016":"\\u0016","\u0017":"\\u0017","\u0018":"\\u0018","\u0019":"\\u0019",
  "\u001a":"\\u001a","\u001b":"\\u001b","\u001c":"\\u001c","\u001d":"\\u001d",
  "\u001e":"\\u001e","\u001f":"\\u001f","\"":"\\\"","\\":"\\\\",
  "\u007f":"\\u007f","\u0080":"\\u0080","\u0081":"\\u0081","\u0082":"\\u0082",
  "\u0083":"\\u0083","\u0084":"\\u0084","\u0085":"\\u0085","\u0086":"\\u0086",
  "\u0087":"\\u0087","\u0088":"\\u0088","\u0089":"\\u0089","\u008a":"\\u008a",
  "\u008b":"\\u008b","\u008c":"\\u008c","\u008d":"\\u008d","\u008e":"\\u008e",
  "\u008f":"\\u008f","\u0090":"\\u0090","\u0091":"\\u0091","\u0092":"\\u0092",
  "\u0093":"\\u0093","\u0094":"\\u0094","\u0095":"\\u0095","\u0096":"\\u0096",
  "\u0097":"\\u0097","\u0098":"\\u0098","\u0099":"\\u0099","\u009a":"\\u009a",
  "\u009b":"\\u009b","\u009c":"\\u009c","\u009d":"\\u009d","\u009e":"\\u009e",
  "\u009f":"\\u009f","\u00ad":"\\u00ad","\u0600":"\\u0600","\u0601":"\\u0601",
  "\u0602":"\\u0602","\u0603":"\\u0603","\u0604":"\\u0604","\u070f":"\\u070f",
  "\u17b4":"\\u17b4","\u17b5":"\\u17b5","\u200c":"\\u200c","\u200d":"\\u200d",
  "\u200e":"\\u200e","\u200f":"\\u200f","\u2028":"\\u2028","\u2029":"\\u2029",
  "\u202a":"\\u202a","\u202b":"\\u202b","\u202c":"\\u202c","\u202d":"\\u202d",
  "\u202e":"\\u202e","\u202f":"\\u202f","\u2060":"\\u2060","\u2061":"\\u2061",
  "\u2062":"\\u2062","\u2063":"\\u2063","\u2064":"\\u2064","\u2065":"\\u2065",
  "\u2066":"\\u2066","\u2067":"\\u2067","\u2068":"\\u2068","\u2069":"\\u2069",
  "\u206a":"\\u206a","\u206b":"\\u206b","\u206c":"\\u206c","\u206d":"\\u206d",
  "\u206e":"\\u206e","\u206f":"\\u206f","\ufeff":"\\ufeff","\ufff0":"\\ufff0",
  "\ufff1":"\\ufff1","\ufff2":"\\ufff2","\ufff3":"\\ufff3","\ufff4":"\\ufff4",
  "\ufff5":"\\ufff5","\ufff6":"\\ufff6","\ufff7":"\\ufff7","\ufff8":"\\ufff8",
  "\ufff9":"\\ufff9","\ufffa":"\\ufffa","\ufffb":"\\ufffb","\ufffc":"\\ufffc",
  "\ufffd":"\\ufffd","\ufffe":"\\ufffe","\uffff":"\\uffff"};
  
  // Some extra characters that Chrome gets wrong, and substitutes with
  // something else on the wire.
  var extra_escapable = /[\x00-\x1f\ud800-\udfff\ufffe\uffff\u0300-\u0333\u033d-\u0346\u034a-\u034c\u0350-\u0352\u0357-\u0358\u035c-\u0362\u0374\u037e\u0387\u0591-\u05af\u05c4\u0610-\u0617\u0653-\u0654\u0657-\u065b\u065d-\u065e\u06df-\u06e2\u06eb-\u06ec\u0730\u0732-\u0733\u0735-\u0736\u073a\u073d\u073f-\u0741\u0743\u0745\u0747\u07eb-\u07f1\u0951\u0958-\u095f\u09dc-\u09dd\u09df\u0a33\u0a36\u0a59-\u0a5b\u0a5e\u0b5c-\u0b5d\u0e38-\u0e39\u0f43\u0f4d\u0f52\u0f57\u0f5c\u0f69\u0f72-\u0f76\u0f78\u0f80-\u0f83\u0f93\u0f9d\u0fa2\u0fa7\u0fac\u0fb9\u1939-\u193a\u1a17\u1b6b\u1cda-\u1cdb\u1dc0-\u1dcf\u1dfc\u1dfe\u1f71\u1f73\u1f75\u1f77\u1f79\u1f7b\u1f7d\u1fbb\u1fbe\u1fc9\u1fcb\u1fd3\u1fdb\u1fe3\u1feb\u1fee-\u1fef\u1ff9\u1ffb\u1ffd\u2000-\u2001\u20d0-\u20d1\u20d4-\u20d7\u20e7-\u20e9\u2126\u212a-\u212b\u2329-\u232a\u2adc\u302b-\u302c\uaab2-\uaab3\uf900-\ufa0d\ufa10\ufa12\ufa15-\ufa1e\ufa20\ufa22\ufa25-\ufa26\ufa2a-\ufa2d\ufa30-\ufa6d\ufa70-\ufad9\ufb1d\ufb1f\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40-\ufb41\ufb43-\ufb44\ufb46-\ufb4e\ufff0-\uffff]/g,
      extra_lookup;
  
  // JSON Quote string. Use native implementation when possible.
  var JSONQuote = (JSON && JSON.stringify) || function(string) {
      json_escapable.lastIndex = 0;
      if (json_escapable.test(string)) {
          string = string.replace(json_escapable, function(a) {
              return json_lookup[a];
          });
      }
      return '"' + string + '"';
  };
  
  // This may be quite slow, so let's delay until user actually uses bad
  // characters.
  var unroll_lookup = function(escapable) {
      var i;
      var unrolled = {}
      var c = []
      for(i=0; i<65536; i++) {
          c.push( String.fromCharCode(i) );
      }
      escapable.lastIndex = 0;
      c.join('').replace(escapable, function (a) {
          unrolled[ a ] = '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
          return '';
      });
      escapable.lastIndex = 0;
      return unrolled;
  };
  
  // Quote string, also taking care of unicode characters that browsers
  // often break. Especially, take care of unicode surrogates:
  //    http://en.wikipedia.org/wiki/Mapping_of_Unicode_characters#Surrogates
  utils.quote = function(string) {
      var quoted = JSONQuote(string);
  
      // In most cases this should be very fast and good enough.
      extra_escapable.lastIndex = 0;
      if(!extra_escapable.test(quoted)) {
          return quoted;
      }
  
      if(!extra_lookup) extra_lookup = unroll_lookup(extra_escapable);
  
      return quoted.replace(extra_escapable, function(a) {
          return extra_lookup[a];
      });
  }
  
  var _all_protocols = ['websocket',
                        'xdr-streaming',
                        'xhr-streaming',
                        'iframe-eventsource',
                        'iframe-htmlfile',
                        'xdr-polling',
                        'xhr-polling',
                        'iframe-xhr-polling',
                        'jsonp-polling'];
  
  utils.probeProtocols = function() {
      var probed = {};
      for(var i=0; i<_all_protocols.length; i++) {
          var protocol = _all_protocols[i];
          // User can have a typo in protocol name.
          probed[protocol] = SockJS[protocol] &&
                             SockJS[protocol].enabled();
      }
      return probed;
  };
  
  utils.detectProtocols = function(probed, protocols_whitelist, info) {
      var pe = {},
          protocols = [];
      if (!protocols_whitelist) protocols_whitelist = _all_protocols;
      for(var i=0; i<protocols_whitelist.length; i++) {
          var protocol = protocols_whitelist[i];
          pe[protocol] = probed[protocol];
      }
      var maybe_push = function(protos) {
          var proto = protos.shift();
          if (pe[proto]) {
              protocols.push(proto);
          } else {
              if (protos.length > 0) {
                  maybe_push(protos);
              }
          }
      }
  
      // 1. Websocket
      if (info.websocket !== false) {
          maybe_push(['websocket']);
      }
  
      // 2. Streaming
      if (pe['xhr-streaming'] && !info.null_origin) {
          protocols.push('xhr-streaming');
      } else {
          if (pe['xdr-streaming'] && !info.cookie_needed && !info.null_origin) {
              protocols.push('xdr-streaming');
          } else {
              maybe_push(['iframe-eventsource',
                          'iframe-htmlfile']);
          }
      }
  
      // 3. Polling
      if (pe['xhr-polling'] && !info.null_origin) {
          protocols.push('xhr-polling');
      } else {
          if (pe['xdr-polling'] && !info.cookie_needed && !info.null_origin) {
              protocols.push('xdr-polling');
          } else {
              maybe_push(['iframe-xhr-polling',
                          'jsonp-polling']);
          }
      }
      return protocols;
  }
  //         [*] End of lib/utils.js
  
  
  //         [*] Including lib/dom.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  // May be used by htmlfile jsonp and transports.
  var MPrefix = '_sockjs_global';
  utils.createHook = function() {
      var window_id = 'a' + utils.random_string(8);
      if (!(MPrefix in _window)) {
          var map = {};
          _window[MPrefix] = function(window_id) {
              if (!(window_id in map)) {
                  map[window_id] = {
                      id: window_id,
                      del: function() {delete map[window_id];}
                  };
              }
              return map[window_id];
          }
      }
      return _window[MPrefix](window_id);
  };
  
  
  
  utils.attachMessage = function(listener) {
      utils.attachEvent('message', listener);
  };
  utils.attachEvent = function(event, listener) {
      if (typeof _window.addEventListener !== 'undefined') {
          _window.addEventListener(event, listener, false);
      } else {
          // IE quirks.
          // According to: http://stevesouders.com/misc/test-postmessage.php
          // the message gets delivered only to 'document', not 'window'.
          _document.attachEvent("on" + event, listener);
          // I get 'window' for ie8.
          _window.attachEvent("on" + event, listener);
      }
  };
  
  utils.detachMessage = function(listener) {
      utils.detachEvent('message', listener);
  };
  utils.detachEvent = function(event, listener) {
      if (typeof _window.addEventListener !== 'undefined') {
          _window.removeEventListener(event, listener, false);
      } else {
          _document.detachEvent("on" + event, listener);
          _window.detachEvent("on" + event, listener);
      }
  };
  
  
  var on_unload = {};
  // Things registered after beforeunload are to be called immediately.
  var after_unload = false;
  
  var trigger_unload_callbacks = function() {
      for(var ref in on_unload) {
          on_unload[ref]();
          delete on_unload[ref];
      };
  };
  
  var unload_triggered = function() {
      if(after_unload) return;
      after_unload = true;
      trigger_unload_callbacks();
  };
  
  // 'unload' alone is not reliable in opera within an iframe, but we
  // can't use `beforeunload` as IE fires it on javascript: links.
  utils.attachEvent('unload', unload_triggered);
  
  utils.unload_add = function(listener) {
      var ref = utils.random_string(8);
      on_unload[ref] = listener;
      if (after_unload) {
          utils.delay(trigger_unload_callbacks);
      }
      return ref;
  };
  utils.unload_del = function(ref) {
      if (ref in on_unload)
          delete on_unload[ref];
  };
  
  
  utils.createIframe = function (iframe_url, error_callback) {
      var iframe = _document.createElement('iframe');
      var tref, unload_ref;
      var unattach = function() {
          clearTimeout(tref);
          // Explorer had problems with that.
          try {iframe.onload = null;} catch (x) {}
          iframe.onerror = null;
      };
      var cleanup = function() {
          if (iframe) {
              unattach();
              // This timeout makes chrome fire onbeforeunload event
              // within iframe. Without the timeout it goes straight to
              // onunload.
              setTimeout(function() {
                  if(iframe) {
                      iframe.parentNode.removeChild(iframe);
                  }
                  iframe = null;
              }, 0);
              utils.unload_del(unload_ref);
          }
      };
      var onerror = function(r) {
          if (iframe) {
              cleanup();
              error_callback(r);
          }
      };
      var post = function(msg, origin) {
          try {
              // When the iframe is not loaded, IE raises an exception
              // on 'contentWindow'.
              if (iframe && iframe.contentWindow) {
                  iframe.contentWindow.postMessage(msg, origin);
              }
          } catch (x) {};
      };
  
      iframe.src = iframe_url;
      iframe.style.display = 'none';
      iframe.style.position = 'absolute';
      iframe.onerror = function(){onerror('onerror');};
      iframe.onload = function() {
          // `onload` is triggered before scripts on the iframe are
          // executed. Give it few seconds to actually load stuff.
          clearTimeout(tref);
          tref = setTimeout(function(){onerror('onload timeout');}, 2000);
      };
      _document.body.appendChild(iframe);
      tref = setTimeout(function(){onerror('timeout');}, 15000);
      unload_ref = utils.unload_add(cleanup);
      return {
          post: post,
          cleanup: cleanup,
          loaded: unattach
      };
  };
  
  utils.createHtmlfile = function (iframe_url, error_callback) {
      var doc = new ActiveXObject('htmlfile');
      var tref, unload_ref;
      var iframe;
      var unattach = function() {
          clearTimeout(tref);
      };
      var cleanup = function() {
          if (doc) {
              unattach();
              utils.unload_del(unload_ref);
              iframe.parentNode.removeChild(iframe);
              iframe = doc = null;
              CollectGarbage();
          }
      };
      var onerror = function(r)  {
          if (doc) {
              cleanup();
              error_callback(r);
          }
      };
      var post = function(msg, origin) {
          try {
              // When the iframe is not loaded, IE raises an exception
              // on 'contentWindow'.
              if (iframe && iframe.contentWindow) {
                  iframe.contentWindow.postMessage(msg, origin);
              }
          } catch (x) {};
      };
  
      doc.open();
      doc.write('<html><s' + 'cript>' +
                'document.domain="' + document.domain + '";' +
                '</s' + 'cript></html>');
      doc.close();
      doc.parentWindow[WPrefix] = _window[WPrefix];
      var c = doc.createElement('div');
      doc.body.appendChild(c);
      iframe = doc.createElement('iframe');
      c.appendChild(iframe);
      iframe.src = iframe_url;
      tref = setTimeout(function(){onerror('timeout');}, 15000);
      unload_ref = utils.unload_add(cleanup);
      return {
          post: post,
          cleanup: cleanup,
          loaded: unattach
      };
  };
  //         [*] End of lib/dom.js
  
  
  //         [*] Including lib/dom2.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var AbstractXHRObject = function(){};
  AbstractXHRObject.prototype = new EventEmitter(['chunk', 'finish']);
  
  AbstractXHRObject.prototype._start = function(method, url, payload, opts) {
      var that = this;
  
      try {
          that.xhr = new XMLHttpRequest();
      } catch(x) {};
  
      if (!that.xhr) {
          try {
              that.xhr = new _window.ActiveXObject('Microsoft.XMLHTTP');
          } catch(x) {};
      }
      if (_window.ActiveXObject || _window.XDomainRequest) {
          // IE8 caches even POSTs
          url += ((url.indexOf('?') === -1) ? '?' : '&') + 't='+(+new Date);
      }
  
      // Explorer tends to keep connection open, even after the
      // tab gets closed: http://bugs.jquery.com/ticket/5280
      that.unload_ref = utils.unload_add(function(){that._cleanup(true);});
      try {
          that.xhr.open(method, url, true);
      } catch(e) {
          // IE raises an exception on wrong port.
          that.emit('finish', 0, '');
          that._cleanup();
          return;
      };
  
      if (!opts || !opts.no_credentials) {
          // Mozilla docs says https://developer.mozilla.org/en/XMLHttpRequest :
          // "This never affects same-site requests."
          that.xhr.withCredentials = 'true';
      }
      if (opts && opts.headers) {
          for(var key in opts.headers) {
              that.xhr.setRequestHeader(key, opts.headers[key]);
          }
      }
  
      that.xhr.onreadystatechange = function() {
          if (that.xhr) {
              var x = that.xhr;
              switch (x.readyState) {
              case 3:
                  // IE doesn't like peeking into responseText or status
                  // on Microsoft.XMLHTTP and readystate=3
                  try {
                      var status = x.status;
                      var text = x.responseText;
                  } catch (x) {};
                  // IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450
                  if (status === 1223) status = 204;
  
                  // IE does return readystate == 3 for 404 answers.
                  if (text && text.length > 0) {
                      that.emit('chunk', status, text);
                  }
                  break;
              case 4:
                  var status = x.status;
                  // IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450
                  if (status === 1223) status = 204;
  
                  that.emit('finish', status, x.responseText);
                  that._cleanup(false);
                  break;
              }
          }
      };
      that.xhr.send(payload);
  };
  
  AbstractXHRObject.prototype._cleanup = function(abort) {
      var that = this;
      if (!that.xhr) return;
      utils.unload_del(that.unload_ref);
  
      // IE needs this field to be a function
      that.xhr.onreadystatechange = function(){};
  
      if (abort) {
          try {
              that.xhr.abort();
          } catch(x) {};
      }
      that.unload_ref = that.xhr = null;
  };
  
  AbstractXHRObject.prototype.close = function() {
      var that = this;
      that.nuke();
      that._cleanup(true);
  };
  
  var XHRCorsObject = utils.XHRCorsObject = function() {
      var that = this, args = arguments;
      utils.delay(function(){that._start.apply(that, args);});
  };
  XHRCorsObject.prototype = new AbstractXHRObject();
  
  var XHRLocalObject = utils.XHRLocalObject = function(method, url, payload) {
      var that = this;
      utils.delay(function(){
          that._start(method, url, payload, {
              no_credentials: true
          });
      });
  };
  XHRLocalObject.prototype = new AbstractXHRObject();
  
  
  
  // References:
  //   http://ajaxian.com/archives/100-line-ajax-wrapper
  //   http://msdn.microsoft.com/en-us/library/cc288060(v=VS.85).aspx
  var XDRObject = utils.XDRObject = function(method, url, payload) {
      var that = this;
      utils.delay(function(){that._start(method, url, payload);});
  };
  XDRObject.prototype = new EventEmitter(['chunk', 'finish']);
  XDRObject.prototype._start = function(method, url, payload) {
      var that = this;
      var xdr = new XDomainRequest();
      // IE caches even POSTs
      url += ((url.indexOf('?') === -1) ? '?' : '&') + 't='+(+new Date);
  
      var onerror = xdr.ontimeout = xdr.onerror = function() {
          that.emit('finish', 0, '');
          that._cleanup(false);
      };
      xdr.onprogress = function() {
          that.emit('chunk', 200, xdr.responseText);
      };
      xdr.onload = function() {
          that.emit('finish', 200, xdr.responseText);
          that._cleanup(false);
      };
      that.xdr = xdr;
      that.unload_ref = utils.unload_add(function(){that._cleanup(true);});
      try {
          // Fails with AccessDenied if port number is bogus
          that.xdr.open(method, url);
          that.xdr.send(payload);
      } catch(x) {
          onerror();
      }
  };
  
  XDRObject.prototype._cleanup = function(abort) {
      var that = this;
      if (!that.xdr) return;
      utils.unload_del(that.unload_ref);
  
      that.xdr.ontimeout = that.xdr.onerror = that.xdr.onprogress =
          that.xdr.onload = null;
      if (abort) {
          try {
              that.xdr.abort();
          } catch(x) {};
      }
      that.unload_ref = that.xdr = null;
  };
  
  XDRObject.prototype.close = function() {
      var that = this;
      that.nuke();
      that._cleanup(true);
  };
  
  // 1. Is natively via XHR
  // 2. Is natively via XDR
  // 3. Nope, but postMessage is there so it should work via the Iframe.
  // 4. Nope, sorry.
  utils.isXHRCorsCapable = function() {
      if (_window.XMLHttpRequest && 'withCredentials' in new XMLHttpRequest()) {
          return 1;
      }
      // XDomainRequest doesn't work if page is served from file://
      if (_window.XDomainRequest && _document.domain) {
          return 2;
      }
      if (IframeTransport.enabled()) {
          return 3;
      }
      return 4;
  };
  //         [*] End of lib/dom2.js
  
  
  //         [*] Including lib/sockjs.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var SockJS = function(url, dep_protocols_whitelist, options) {
      if (this === _window) {
          // makes `new` optional
          return new SockJS(url, dep_protocols_whitelist, options);
      }
      
      var that = this, protocols_whitelist;
      that._options = {devel: false, debug: false, protocols_whitelist: [],
                       info: undefined, rtt: undefined};
      if (options) {
          utils.objectExtend(that._options, options);
      }
      that._base_url = utils.amendUrl(url);
      that._server = that._options.server || utils.random_number_string(1000);
      if (that._options.protocols_whitelist &&
          that._options.protocols_whitelist.length) {
          protocols_whitelist = that._options.protocols_whitelist;
      } else {
          // Deprecated API
          if (typeof dep_protocols_whitelist === 'string' &&
              dep_protocols_whitelist.length > 0) {
              protocols_whitelist = [dep_protocols_whitelist];
          } else if (utils.isArray(dep_protocols_whitelist)) {
              protocols_whitelist = dep_protocols_whitelist
          } else {
              protocols_whitelist = null;
          }
          if (protocols_whitelist) {
              that._debug('Deprecated API: Use "protocols_whitelist" option ' +
                          'instead of supplying protocol list as a second ' +
                          'parameter to SockJS constructor.');
          }
      }
      that._protocols = [];
      that.protocol = null;
      that.readyState = SockJS.CONNECTING;
      that._ir = createInfoReceiver(that._base_url);
      that._ir.onfinish = function(info, rtt) {
          that._ir = null;
          if (info) {
              if (that._options.info) {
                  // Override if user supplies the option
                  info = utils.objectExtend(info, that._options.info);
              }
              if (that._options.rtt) {
                  rtt = that._options.rtt;
              }
              that._applyInfo(info, rtt, protocols_whitelist);
              that._didClose();
          } else {
              that._didClose(1002, 'Can\'t connect to server', true);
          }
      };
  };
  // Inheritance
  SockJS.prototype = new REventTarget();
  
  SockJS.version = "0.3.4";
  
  SockJS.CONNECTING = 0;
  SockJS.OPEN = 1;
  SockJS.CLOSING = 2;
  SockJS.CLOSED = 3;
  
  SockJS.prototype._debug = function() {
      if (this._options.debug)
          utils.log.apply(utils, arguments);
  };
  
  SockJS.prototype._dispatchOpen = function() {
      var that = this;
      if (that.readyState === SockJS.CONNECTING) {
          if (that._transport_tref) {
              clearTimeout(that._transport_tref);
              that._transport_tref = null;
          }
          that.readyState = SockJS.OPEN;
          that.dispatchEvent(new SimpleEvent("open"));
      } else {
          // The server might have been restarted, and lost track of our
          // connection.
          that._didClose(1006, "Server lost session");
      }
  };
  
  SockJS.prototype._dispatchMessage = function(data) {
      var that = this;
      if (that.readyState !== SockJS.OPEN)
              return;
      that.dispatchEvent(new SimpleEvent("message", {data: data}));
  };
  
  SockJS.prototype._dispatchHeartbeat = function(data) {
      var that = this;
      if (that.readyState !== SockJS.OPEN)
          return;
      that.dispatchEvent(new SimpleEvent('heartbeat', {}));
  };
  
  SockJS.prototype._didClose = function(code, reason, force) {
      var that = this;
      if (that.readyState !== SockJS.CONNECTING &&
          that.readyState !== SockJS.OPEN &&
          that.readyState !== SockJS.CLOSING)
              throw new Error('INVALID_STATE_ERR');
      if (that._ir) {
          that._ir.nuke();
          that._ir = null;
      }
  
      if (that._transport) {
          that._transport.doCleanup();
          that._transport = null;
      }
  
      var close_event = new SimpleEvent("close", {
          code: code,
          reason: reason,
          wasClean: utils.userSetCode(code)});
  
      if (!utils.userSetCode(code) &&
          that.readyState === SockJS.CONNECTING && !force) {
          if (that._try_next_protocol(close_event)) {
              return;
          }
          close_event = new SimpleEvent("close", {code: 2000,
                                                  reason: "All transports failed",
                                                  wasClean: false,
                                                  last_event: close_event});
      }
      that.readyState = SockJS.CLOSED;
  
      utils.delay(function() {
                     that.dispatchEvent(close_event);
                  });
  };
  
  SockJS.prototype._didMessage = function(data) {
      var that = this;
      var type = data.slice(0, 1);
      switch(type) {
      case 'o':
          that._dispatchOpen();
          break;
      case 'a':
          var payload = JSON.parse(data.slice(1) || '[]');
          for(var i=0; i < payload.length; i++){
              that._dispatchMessage(payload[i]);
          }
          break;
      case 'm':
          var payload = JSON.parse(data.slice(1) || 'null');
          that._dispatchMessage(payload);
          break;
      case 'c':
          var payload = JSON.parse(data.slice(1) || '[]');
          that._didClose(payload[0], payload[1]);
          break;
      case 'h':
          that._dispatchHeartbeat();
          break;
      }
  };
  
  SockJS.prototype._try_next_protocol = function(close_event) {
      var that = this;
      if (that.protocol) {
          that._debug('Closed transport:', that.protocol, ''+close_event);
          that.protocol = null;
      }
      if (that._transport_tref) {
          clearTimeout(that._transport_tref);
          that._transport_tref = null;
      }
  
      while(1) {
          var protocol = that.protocol = that._protocols.shift();
          if (!protocol) {
              return false;
          }
          // Some protocols require access to `body`, what if were in
          // the `head`?
          if (SockJS[protocol] &&
              SockJS[protocol].need_body === true &&
              (!_document.body ||
               (typeof _document.readyState !== 'undefined'
                && _document.readyState !== 'complete'))) {
              that._protocols.unshift(protocol);
              that.protocol = 'waiting-for-load';
              utils.attachEvent('load', function(){
                  that._try_next_protocol();
              });
              return true;
          }
  
          if (!SockJS[protocol] ||
                !SockJS[protocol].enabled(that._options)) {
              that._debug('Skipping transport:', protocol);
          } else {
              var roundTrips = SockJS[protocol].roundTrips || 1;
              var to = ((that._options.rto || 0) * roundTrips) || 5000;
              that._transport_tref = utils.delay(to, function() {
                  if (that.readyState === SockJS.CONNECTING) {
                      // I can't understand how it is possible to run
                      // this timer, when the state is CLOSED, but
                      // apparently in IE everythin is possible.
                      that._didClose(2007, "Transport timeouted");
                  }
              });
  
              var connid = utils.random_string(8);
              var trans_url = that._base_url + '/' + that._server + '/' + connid;
              that._debug('Opening transport:', protocol, ' url:'+trans_url,
                          ' RTO:'+that._options.rto);
              that._transport = new SockJS[protocol](that, trans_url,
                                                     that._base_url);
              return true;
          }
      }
  };
  
  SockJS.prototype.close = function(code, reason) {
      var that = this;
      if (code && !utils.userSetCode(code))
          throw new Error("INVALID_ACCESS_ERR");
      if(that.readyState !== SockJS.CONNECTING &&
         that.readyState !== SockJS.OPEN) {
          return false;
      }
      that.readyState = SockJS.CLOSING;
      that._didClose(code || 1000, reason || "Normal closure");
      return true;
  };
  
  SockJS.prototype.send = function(data) {
      var that = this;
      if (that.readyState === SockJS.CONNECTING)
          throw new Error('INVALID_STATE_ERR');
      if (that.readyState === SockJS.OPEN) {
          that._transport.doSend(utils.quote('' + data));
      }
      return true;
  };
  
  SockJS.prototype._applyInfo = function(info, rtt, protocols_whitelist) {
      var that = this;
      that._options.info = info;
      that._options.rtt = rtt;
      that._options.rto = utils.countRTO(rtt);
      that._options.info.null_origin = !_document.domain;
      var probed = utils.probeProtocols();
      that._protocols = utils.detectProtocols(probed, protocols_whitelist, info);
  };
  //         [*] End of lib/sockjs.js
  
  
  //         [*] Including lib/trans-websocket.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var WebSocketTransport = SockJS.websocket = function(ri, trans_url) {
      var that = this;
      var url = trans_url + '/websocket';
      if (url.slice(0, 5) === 'https') {
          url = 'wss' + url.slice(5);
      } else {
          url = 'ws' + url.slice(4);
      }
      that.ri = ri;
      that.url = url;
      var Constructor = _window.WebSocket || _window.MozWebSocket;
  
      that.ws = new Constructor(that.url);
      that.ws.onmessage = function(e) {
          that.ri._didMessage(e.data);
      };
      // Firefox has an interesting bug. If a websocket connection is
      // created after onunload, it stays alive even when user
      // navigates away from the page. In such situation let's lie -
      // let's not open the ws connection at all. See:
      // https://github.com/sockjs/sockjs-client/issues/28
      // https://bugzilla.mozilla.org/show_bug.cgi?id=696085
      that.unload_ref = utils.unload_add(function(){that.ws.close()});
      that.ws.onclose = function() {
          that.ri._didMessage(utils.closeFrame(1006, "WebSocket connection broken"));
      };
  };
  
  WebSocketTransport.prototype.doSend = function(data) {
      this.ws.send('[' + data + ']');
  };
  
  WebSocketTransport.prototype.doCleanup = function() {
      var that = this;
      var ws = that.ws;
      if (ws) {
          ws.onmessage = ws.onclose = null;
          ws.close();
          utils.unload_del(that.unload_ref);
          that.unload_ref = that.ri = that.ws = null;
      }
  };
  
  WebSocketTransport.enabled = function() {
      return !!(_window.WebSocket || _window.MozWebSocket);
  };
  
  // In theory, ws should require 1 round trip. But in chrome, this is
  // not very stable over SSL. Most likely a ws connection requires a
  // separate SSL connection, in which case 2 round trips are an
  // absolute minumum.
  WebSocketTransport.roundTrips = 2;
  //         [*] End of lib/trans-websocket.js
  
  
  //         [*] Including lib/trans-sender.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var BufferedSender = function() {};
  BufferedSender.prototype.send_constructor = function(sender) {
      var that = this;
      that.send_buffer = [];
      that.sender = sender;
  };
  BufferedSender.prototype.doSend = function(message) {
      var that = this;
      that.send_buffer.push(message);
      if (!that.send_stop) {
          that.send_schedule();
      }
  };
  
  // For polling transports in a situation when in the message callback,
  // new message is being send. If the sending connection was started
  // before receiving one, it is possible to saturate the network and
  // timeout due to the lack of receiving socket. To avoid that we delay
  // sending messages by some small time, in order to let receiving
  // connection be started beforehand. This is only a halfmeasure and
  // does not fix the big problem, but it does make the tests go more
  // stable on slow networks.
  BufferedSender.prototype.send_schedule_wait = function() {
      var that = this;
      var tref;
      that.send_stop = function() {
          that.send_stop = null;
          clearTimeout(tref);
      };
      tref = utils.delay(25, function() {
          that.send_stop = null;
          that.send_schedule();
      });
  };
  
  BufferedSender.prototype.send_schedule = function() {
      var that = this;
      if (that.send_buffer.length > 0) {
          var payload = '[' + that.send_buffer.join(',') + ']';
          that.send_stop = that.sender(that.trans_url, payload, function(success, abort_reason) {
              that.send_stop = null;
              if (success === false) {
                  that.ri._didClose(1006, 'Sending error ' + abort_reason);
              } else {
                  that.send_schedule_wait();
              }
          });
          that.send_buffer = [];
      }
  };
  
  BufferedSender.prototype.send_destructor = function() {
      var that = this;
      if (that._send_stop) {
          that._send_stop();
      }
      that._send_stop = null;
  };
  
  var jsonPGenericSender = function(url, payload, callback) {
      var that = this;
  
      if (!('_send_form' in that)) {
          var form = that._send_form = _document.createElement('form');
          var area = that._send_area = _document.createElement('textarea');
          area.name = 'd';
          form.style.display = 'none';
          form.style.position = 'absolute';
          form.method = 'POST';
          form.enctype = 'application/x-www-form-urlencoded';
          form.acceptCharset = "UTF-8";
          form.appendChild(area);
          _document.body.appendChild(form);
      }
      var form = that._send_form;
      var area = that._send_area;
      var id = 'a' + utils.random_string(8);
      form.target = id;
      form.action = url + '/jsonp_send?i=' + id;
  
      var iframe;
      try {
          // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
          iframe = _document.createElement('<iframe name="'+ id +'">');
      } catch(x) {
          iframe = _document.createElement('iframe');
          iframe.name = id;
      }
      iframe.id = id;
      form.appendChild(iframe);
      iframe.style.display = 'none';
  
      try {
          area.value = payload;
      } catch(e) {
          utils.log('Your browser is seriously broken. Go home! ' + e.message);
      }
      form.submit();
  
      var completed = function(e) {
          if (!iframe.onerror) return;
          iframe.onreadystatechange = iframe.onerror = iframe.onload = null;
          // Opera mini doesn't like if we GC iframe
          // immediately, thus this timeout.
          utils.delay(500, function() {
                         iframe.parentNode.removeChild(iframe);
                         iframe = null;
                     });
          area.value = '';
          // It is not possible to detect if the iframe succeeded or
          // failed to submit our form.
          callback(true);
      };
      iframe.onerror = iframe.onload = completed;
      iframe.onreadystatechange = function(e) {
          if (iframe.readyState == 'complete') completed();
      };
      return completed;
  };
  
  var createAjaxSender = function(AjaxObject) {
      return function(url, payload, callback) {
          var xo = new AjaxObject('POST', url + '/xhr_send', payload);
          xo.onfinish = function(status, text) {
              callback(status === 200 || status === 204,
                       'http status ' + status);
          };
          return function(abort_reason) {
              callback(false, abort_reason);
          };
      };
  };
  //         [*] End of lib/trans-sender.js
  
  
  //         [*] Including lib/trans-jsonp-receiver.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  // Parts derived from Socket.io:
  //    https://github.com/LearnBoost/socket.io/blob/0.6.17/lib/socket.io/transports/jsonp-polling.js
  // and jQuery-JSONP:
  //    https://code.google.com/p/jquery-jsonp/source/browse/trunk/core/jquery.jsonp.js
  var jsonPGenericReceiver = function(url, callback) {
      var tref;
      var script = _document.createElement('script');
      var script2;  // Opera synchronous load trick.
      var close_script = function(frame) {
          if (script2) {
              script2.parentNode.removeChild(script2);
              script2 = null;
          }
          if (script) {
              clearTimeout(tref);
              // Unfortunately, you can't really abort script loading of
              // the script.
              script.parentNode.removeChild(script);
              script.onreadystatechange = script.onerror =
                  script.onload = script.onclick = null;
              script = null;
              callback(frame);
              callback = null;
          }
      };
  
      // IE9 fires 'error' event after orsc or before, in random order.
      var loaded_okay = false;
      var error_timer = null;
  
      script.id = 'a' + utils.random_string(8);
      script.src = url;
      script.type = 'text/javascript';
      script.charset = 'UTF-8';
      script.onerror = function(e) {
          if (!error_timer) {
              // Delay firing close_script.
              error_timer = setTimeout(function() {
                  if (!loaded_okay) {
                      close_script(utils.closeFrame(
                          1006,
                          "JSONP script loaded abnormally (onerror)"));
                  }
              }, 1000);
          }
      };
      script.onload = function(e) {
          close_script(utils.closeFrame(1006, "JSONP script loaded abnormally (onload)"));
      };
  
      script.onreadystatechange = function(e) {
          if (/loaded|closed/.test(script.readyState)) {
              if (script && script.htmlFor && script.onclick) {
                  loaded_okay = true;
                  try {
                      // In IE, actually execute the script.
                      script.onclick();
                  } catch (x) {}
              }
              if (script) {
                  close_script(utils.closeFrame(1006, "JSONP script loaded abnormally (onreadystatechange)"));
              }
          }
      };
      // IE: event/htmlFor/onclick trick.
      // One can't rely on proper order for onreadystatechange. In order to
      // make sure, set a 'htmlFor' and 'event' properties, so that
      // script code will be installed as 'onclick' handler for the
      // script object. Later, onreadystatechange, manually execute this
      // code. FF and Chrome doesn't work with 'event' and 'htmlFor'
      // set. For reference see:
      //   http://jaubourg.net/2010/07/loading-script-as-onclick-handler-of.html
      // Also, read on that about script ordering:
      //   http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order
      if (typeof script.async === 'undefined' && _document.attachEvent) {
          // According to mozilla docs, in recent browsers script.async defaults
          // to 'true', so we may use it to detect a good browser:
          // https://developer.mozilla.org/en/HTML/Element/script
          if (!/opera/i.test(navigator.userAgent)) {
              // Naively assume we're in IE
              try {
                  script.htmlFor = script.id;
                  script.event = "onclick";
              } catch (x) {}
              script.async = true;
          } else {
              // Opera, second sync script hack
              script2 = _document.createElement('script');
              script2.text = "try{var a = document.getElementById('"+script.id+"'); if(a)a.onerror();}catch(x){};";
              script.async = script2.async = false;
          }
      }
      if (typeof script.async !== 'undefined') {
          script.async = true;
      }
  
      // Fallback mostly for Konqueror - stupid timer, 35 seconds shall be plenty.
      tref = setTimeout(function() {
                            close_script(utils.closeFrame(1006, "JSONP script loaded abnormally (timeout)"));
                        }, 35000);
  
      var head = _document.getElementsByTagName('head')[0];
      head.insertBefore(script, head.firstChild);
      if (script2) {
          head.insertBefore(script2, head.firstChild);
      }
      return close_script;
  };
  //         [*] End of lib/trans-jsonp-receiver.js
  
  
  //         [*] Including lib/trans-jsonp-polling.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  // The simplest and most robust transport, using the well-know cross
  // domain hack - JSONP. This transport is quite inefficient - one
  // mssage could use up to one http request. But at least it works almost
  // everywhere.
  // Known limitations:
  //   o you will get a spinning cursor
  //   o for Konqueror a dumb timer is needed to detect errors
  
  
  var JsonPTransport = SockJS['jsonp-polling'] = function(ri, trans_url) {
      utils.polluteGlobalNamespace();
      var that = this;
      that.ri = ri;
      that.trans_url = trans_url;
      that.send_constructor(jsonPGenericSender);
      that._schedule_recv();
  };
  
  // Inheritnace
  JsonPTransport.prototype = new BufferedSender();
  
  JsonPTransport.prototype._schedule_recv = function() {
      var that = this;
      var callback = function(data) {
          that._recv_stop = null;
          if (data) {
              // no data - heartbeat;
              if (!that._is_closing) {
                  that.ri._didMessage(data);
              }
          }
          // The message can be a close message, and change is_closing state.
          if (!that._is_closing) {
              that._schedule_recv();
          }
      };
      that._recv_stop = jsonPReceiverWrapper(that.trans_url + '/jsonp',
                                             jsonPGenericReceiver, callback);
  };
  
  JsonPTransport.enabled = function() {
      return true;
  };
  
  JsonPTransport.need_body = true;
  
  
  JsonPTransport.prototype.doCleanup = function() {
      var that = this;
      that._is_closing = true;
      if (that._recv_stop) {
          that._recv_stop();
      }
      that.ri = that._recv_stop = null;
      that.send_destructor();
  };
  
  
  // Abstract away code that handles global namespace pollution.
  var jsonPReceiverWrapper = function(url, constructReceiver, user_callback) {
      var id = 'a' + utils.random_string(6);
      var url_id = url + '?c=' + escape(WPrefix + '.' + id);
  
      // Unfortunately it is not possible to abort loading of the
      // script. We need to keep track of frake close frames.
      var aborting = 0;
  
      // Callback will be called exactly once.
      var callback = function(frame) {
          switch(aborting) {
          case 0:
              // Normal behaviour - delete hook _and_ emit message.
              delete _window[WPrefix][id];
              user_callback(frame);
              break;
          case 1:
              // Fake close frame - emit but don't delete hook.
              user_callback(frame);
              aborting = 2;
              break;
          case 2:
              // Got frame after connection was closed, delete hook, don't emit.
              delete _window[WPrefix][id];
              break;
          }
      };
  
      var close_script = constructReceiver(url_id, callback);
      _window[WPrefix][id] = close_script;
      var stop = function() {
          if (_window[WPrefix][id]) {
              aborting = 1;
              _window[WPrefix][id](utils.closeFrame(1000, "JSONP user aborted read"));
          }
      };
      return stop;
  };
  //         [*] End of lib/trans-jsonp-polling.js
  
  
  //         [*] Including lib/trans-xhr.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var AjaxBasedTransport = function() {};
  AjaxBasedTransport.prototype = new BufferedSender();
  
  AjaxBasedTransport.prototype.run = function(ri, trans_url,
                                              url_suffix, Receiver, AjaxObject) {
      var that = this;
      that.ri = ri;
      that.trans_url = trans_url;
      that.send_constructor(createAjaxSender(AjaxObject));
      that.poll = new Polling(ri, Receiver,
                              trans_url + url_suffix, AjaxObject);
  };
  
  AjaxBasedTransport.prototype.doCleanup = function() {
      var that = this;
      if (that.poll) {
          that.poll.abort();
          that.poll = null;
      }
  };
  
  // xhr-streaming
  var XhrStreamingTransport = SockJS['xhr-streaming'] = function(ri, trans_url) {
      this.run(ri, trans_url, '/xhr_streaming', XhrReceiver, utils.XHRCorsObject);
  };
  
  XhrStreamingTransport.prototype = new AjaxBasedTransport();
  
  XhrStreamingTransport.enabled = function() {
      // Support for CORS Ajax aka Ajax2? Opera 12 claims CORS but
      // doesn't do streaming.
      return (_window.XMLHttpRequest &&
              'withCredentials' in new XMLHttpRequest() &&
              (!/opera/i.test(navigator.userAgent)));
  };
  XhrStreamingTransport.roundTrips = 2; // preflight, ajax
  
  // Safari gets confused when a streaming ajax request is started
  // before onload. This causes the load indicator to spin indefinetely.
  XhrStreamingTransport.need_body = true;
  
  
  // According to:
  //   http://stackoverflow.com/questions/1641507/detect-browser-support-for-cross-domain-xmlhttprequests
  //   http://hacks.mozilla.org/2009/07/cross-site-xmlhttprequest-with-cors/
  
  
  // xdr-streaming
  var XdrStreamingTransport = SockJS['xdr-streaming'] = function(ri, trans_url) {
      this.run(ri, trans_url, '/xhr_streaming', XhrReceiver, utils.XDRObject);
  };
  
  XdrStreamingTransport.prototype = new AjaxBasedTransport();
  
  XdrStreamingTransport.enabled = function() {
      return !!_window.XDomainRequest;
  };
  XdrStreamingTransport.roundTrips = 2; // preflight, ajax
  
  
  
  // xhr-polling
  var XhrPollingTransport = SockJS['xhr-polling'] = function(ri, trans_url) {
      this.run(ri, trans_url, '/xhr', XhrReceiver, utils.XHRCorsObject);
  };
  
  XhrPollingTransport.prototype = new AjaxBasedTransport();
  
  XhrPollingTransport.enabled = XhrStreamingTransport.enabled;
  XhrPollingTransport.roundTrips = 2; // preflight, ajax
  
  
  // xdr-polling
  var XdrPollingTransport = SockJS['xdr-polling'] = function(ri, trans_url) {
      this.run(ri, trans_url, '/xhr', XhrReceiver, utils.XDRObject);
  };
  
  XdrPollingTransport.prototype = new AjaxBasedTransport();
  
  XdrPollingTransport.enabled = XdrStreamingTransport.enabled;
  XdrPollingTransport.roundTrips = 2; // preflight, ajax
  //         [*] End of lib/trans-xhr.js
  
  
  //         [*] Including lib/trans-iframe.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  // Few cool transports do work only for same-origin. In order to make
  // them working cross-domain we shall use iframe, served form the
  // remote domain. New browsers, have capabilities to communicate with
  // cross domain iframe, using postMessage(). In IE it was implemented
  // from IE 8+, but of course, IE got some details wrong:
  //    http://msdn.microsoft.com/en-us/library/cc197015(v=VS.85).aspx
  //    http://stevesouders.com/misc/test-postmessage.php
  
  var IframeTransport = function() {};
  
  IframeTransport.prototype.i_constructor = function(ri, trans_url, base_url) {
      var that = this;
      that.ri = ri;
      that.origin = utils.getOrigin(base_url);
      that.base_url = base_url;
      that.trans_url = trans_url;
  
      var iframe_url = base_url + '/iframe.html';
      if (that.ri._options.devel) {
          iframe_url += '?t=' + (+new Date);
      }
      that.window_id = utils.random_string(8);
      iframe_url += '#' + that.window_id;
  
      that.iframeObj = utils.createIframe(iframe_url, function(r) {
                                              that.ri._didClose(1006, "Unable to load an iframe (" + r + ")");
                                          });
  
      that.onmessage_cb = utils.bind(that.onmessage, that);
      utils.attachMessage(that.onmessage_cb);
  };
  
  IframeTransport.prototype.doCleanup = function() {
      var that = this;
      if (that.iframeObj) {
          utils.detachMessage(that.onmessage_cb);
          try {
              // When the iframe is not loaded, IE raises an exception
              // on 'contentWindow'.
              if (that.iframeObj.iframe.contentWindow) {
                  that.postMessage('c');
              }
          } catch (x) {}
          that.iframeObj.cleanup();
          that.iframeObj = null;
          that.onmessage_cb = that.iframeObj = null;
      }
  };
  
  IframeTransport.prototype.onmessage = function(e) {
      var that = this;
      if (e.origin !== that.origin) return;
      var window_id = e.data.slice(0, 8);
      var type = e.data.slice(8, 9);
      var data = e.data.slice(9);
  
      if (window_id !== that.window_id) return;
  
      switch(type) {
      case 's':
          that.iframeObj.loaded();
          that.postMessage('s', JSON.stringify([SockJS.version, that.protocol, that.trans_url, that.base_url]));
          break;
      case 't':
          that.ri._didMessage(data);
          break;
      }
  };
  
  IframeTransport.prototype.postMessage = function(type, data) {
      var that = this;
      that.iframeObj.post(that.window_id + type + (data || ''), that.origin);
  };
  
  IframeTransport.prototype.doSend = function (message) {
      this.postMessage('m', message);
  };
  
  IframeTransport.enabled = function() {
      // postMessage misbehaves in konqueror 4.6.5 - the messages are delivered with
      // huge delay, or not at all.
      var konqueror = navigator && navigator.userAgent && navigator.userAgent.indexOf('Konqueror') !== -1;
      return ((typeof _window.postMessage === 'function' ||
              typeof _window.postMessage === 'object') && (!konqueror));
  };
  //         [*] End of lib/trans-iframe.js
  
  
  //         [*] Including lib/trans-iframe-within.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var curr_window_id;
  
  var postMessage = function (type, data) {
      if(parent !== _window) {
          parent.postMessage(curr_window_id + type + (data || ''), '*');
      } else {
          utils.log("Can't postMessage, no parent window.", type, data);
      }
  };
  
  var FacadeJS = function() {};
  FacadeJS.prototype._didClose = function (code, reason) {
      postMessage('t', utils.closeFrame(code, reason));
  };
  FacadeJS.prototype._didMessage = function (frame) {
      postMessage('t', frame);
  };
  FacadeJS.prototype._doSend = function (data) {
      this._transport.doSend(data);
  };
  FacadeJS.prototype._doCleanup = function () {
      this._transport.doCleanup();
  };
  
  utils.parent_origin = undefined;
  
  SockJS.bootstrap_iframe = function() {
      var facade;
      curr_window_id = _document.location.hash.slice(1);
      var onMessage = function(e) {
          if(e.source !== parent) return;
          if(typeof utils.parent_origin === 'undefined')
              utils.parent_origin = e.origin;
          if (e.origin !== utils.parent_origin) return;
  
          var window_id = e.data.slice(0, 8);
          var type = e.data.slice(8, 9);
          var data = e.data.slice(9);
          if (window_id !== curr_window_id) return;
          switch(type) {
          case 's':
              var p = JSON.parse(data);
              var version = p[0];
              var protocol = p[1];
              var trans_url = p[2];
              var base_url = p[3];
              if (version !== SockJS.version) {
                  utils.log("Incompatibile SockJS! Main site uses:" +
                            " \"" + version + "\", the iframe:" +
                            " \"" + SockJS.version + "\".");
              }
              if (!utils.flatUrl(trans_url) || !utils.flatUrl(base_url)) {
                  utils.log("Only basic urls are supported in SockJS");
                  return;
              }
  
              if (!utils.isSameOriginUrl(trans_url) ||
                  !utils.isSameOriginUrl(base_url)) {
                  utils.log("Can't connect to different domain from within an " +
                            "iframe. (" + JSON.stringify([_window.location.href, trans_url, base_url]) +
                            ")");
                  return;
              }
              facade = new FacadeJS();
              facade._transport = new FacadeJS[protocol](facade, trans_url, base_url);
              break;
          case 'm':
              facade._doSend(data);
              break;
          case 'c':
              if (facade)
                  facade._doCleanup();
              facade = null;
              break;
          }
      };
  
      // alert('test ticker');
      // facade = new FacadeJS();
      // facade._transport = new FacadeJS['w-iframe-xhr-polling'](facade, 'http://host.com:9999/ticker/12/basd');
  
      utils.attachMessage(onMessage);
  
      // Start
      postMessage('s');
  };
  //         [*] End of lib/trans-iframe-within.js
  
  
  //         [*] Including lib/info.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var InfoReceiver = function(base_url, AjaxObject) {
      var that = this;
      utils.delay(function(){that.doXhr(base_url, AjaxObject);});
  };
  
  InfoReceiver.prototype = new EventEmitter(['finish']);
  
  InfoReceiver.prototype.doXhr = function(base_url, AjaxObject) {
      var that = this;
      var t0 = (new Date()).getTime();
      var xo = new AjaxObject('GET', base_url + '/info');
  
      var tref = utils.delay(8000,
                             function(){xo.ontimeout();});
  
      xo.onfinish = function(status, text) {
          clearTimeout(tref);
          tref = null;
          if (status === 200) {
              var rtt = (new Date()).getTime() - t0;
              var info = JSON.parse(text);
              if (typeof info !== 'object') info = {};
              that.emit('finish', info, rtt);
          } else {
              that.emit('finish');
          }
      };
      xo.ontimeout = function() {
          xo.close();
          that.emit('finish');
      };
  };
  
  var InfoReceiverIframe = function(base_url) {
      var that = this;
      var go = function() {
          var ifr = new IframeTransport();
          ifr.protocol = 'w-iframe-info-receiver';
          var fun = function(r) {
              if (typeof r === 'string' && r.substr(0,1) === 'm') {
                  var d = JSON.parse(r.substr(1));
                  var info = d[0], rtt = d[1];
                  that.emit('finish', info, rtt);
              } else {
                  that.emit('finish');
              }
              ifr.doCleanup();
              ifr = null;
          };
          var mock_ri = {
              _options: {},
              _didClose: fun,
              _didMessage: fun
          };
          ifr.i_constructor(mock_ri, base_url, base_url);
      }
      if(!_document.body) {
          utils.attachEvent('load', go);
      } else {
          go();
      }
  };
  InfoReceiverIframe.prototype = new EventEmitter(['finish']);
  
  
  var InfoReceiverFake = function() {
      // It may not be possible to do cross domain AJAX to get the info
      // data, for example for IE7. But we want to run JSONP, so let's
      // fake the response, with rtt=2s (rto=6s).
      var that = this;
      utils.delay(function() {
          that.emit('finish', {}, 2000);
      });
  };
  InfoReceiverFake.prototype = new EventEmitter(['finish']);
  
  var createInfoReceiver = function(base_url) {
      if (utils.isSameOriginUrl(base_url)) {
          // If, for some reason, we have SockJS locally - there's no
          // need to start up the complex machinery. Just use ajax.
          return new InfoReceiver(base_url, utils.XHRLocalObject);
      }
      switch (utils.isXHRCorsCapable()) {
      case 1:
          // XHRLocalObject -> no_credentials=true
          return new InfoReceiver(base_url, utils.XHRLocalObject);
      case 2:
          return new InfoReceiver(base_url, utils.XDRObject);
      case 3:
          // Opera
          return new InfoReceiverIframe(base_url);
      default:
          // IE 7
          return new InfoReceiverFake();
      };
  };
  
  
  var WInfoReceiverIframe = FacadeJS['w-iframe-info-receiver'] = function(ri, _trans_url, base_url) {
      var ir = new InfoReceiver(base_url, utils.XHRLocalObject);
      ir.onfinish = function(info, rtt) {
          ri._didMessage('m'+JSON.stringify([info, rtt]));
          ri._didClose();
      }
  };
  WInfoReceiverIframe.prototype.doCleanup = function() {};
  //         [*] End of lib/info.js
  
  
  //         [*] Including lib/trans-iframe-eventsource.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var EventSourceIframeTransport = SockJS['iframe-eventsource'] = function () {
      var that = this;
      that.protocol = 'w-iframe-eventsource';
      that.i_constructor.apply(that, arguments);
  };
  
  EventSourceIframeTransport.prototype = new IframeTransport();
  
  EventSourceIframeTransport.enabled = function () {
      return ('EventSource' in _window) && IframeTransport.enabled();
  };
  
  EventSourceIframeTransport.need_body = true;
  EventSourceIframeTransport.roundTrips = 3; // html, javascript, eventsource
  
  
  // w-iframe-eventsource
  var EventSourceTransport = FacadeJS['w-iframe-eventsource'] = function(ri, trans_url) {
      this.run(ri, trans_url, '/eventsource', EventSourceReceiver, utils.XHRLocalObject);
  }
  EventSourceTransport.prototype = new AjaxBasedTransport();
  //         [*] End of lib/trans-iframe-eventsource.js
  
  
  //         [*] Including lib/trans-iframe-xhr-polling.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var XhrPollingIframeTransport = SockJS['iframe-xhr-polling'] = function () {
      var that = this;
      that.protocol = 'w-iframe-xhr-polling';
      that.i_constructor.apply(that, arguments);
  };
  
  XhrPollingIframeTransport.prototype = new IframeTransport();
  
  XhrPollingIframeTransport.enabled = function () {
      return _window.XMLHttpRequest && IframeTransport.enabled();
  };
  
  XhrPollingIframeTransport.need_body = true;
  XhrPollingIframeTransport.roundTrips = 3; // html, javascript, xhr
  
  
  // w-iframe-xhr-polling
  var XhrPollingITransport = FacadeJS['w-iframe-xhr-polling'] = function(ri, trans_url) {
      this.run(ri, trans_url, '/xhr', XhrReceiver, utils.XHRLocalObject);
  };
  
  XhrPollingITransport.prototype = new AjaxBasedTransport();
  //         [*] End of lib/trans-iframe-xhr-polling.js
  
  
  //         [*] Including lib/trans-iframe-htmlfile.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  // This transport generally works in any browser, but will cause a
  // spinning cursor to appear in any browser other than IE.
  // We may test this transport in all browsers - why not, but in
  // production it should be only run in IE.
  
  var HtmlFileIframeTransport = SockJS['iframe-htmlfile'] = function () {
      var that = this;
      that.protocol = 'w-iframe-htmlfile';
      that.i_constructor.apply(that, arguments);
  };
  
  // Inheritance.
  HtmlFileIframeTransport.prototype = new IframeTransport();
  
  HtmlFileIframeTransport.enabled = function() {
      return IframeTransport.enabled();
  };
  
  HtmlFileIframeTransport.need_body = true;
  HtmlFileIframeTransport.roundTrips = 3; // html, javascript, htmlfile
  
  
  // w-iframe-htmlfile
  var HtmlFileTransport = FacadeJS['w-iframe-htmlfile'] = function(ri, trans_url) {
      this.run(ri, trans_url, '/htmlfile', HtmlfileReceiver, utils.XHRLocalObject);
  };
  HtmlFileTransport.prototype = new AjaxBasedTransport();
  //         [*] End of lib/trans-iframe-htmlfile.js
  
  
  //         [*] Including lib/trans-polling.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var Polling = function(ri, Receiver, recv_url, AjaxObject) {
      var that = this;
      that.ri = ri;
      that.Receiver = Receiver;
      that.recv_url = recv_url;
      that.AjaxObject = AjaxObject;
      that._scheduleRecv();
  };
  
  Polling.prototype._scheduleRecv = function() {
      var that = this;
      var poll = that.poll = new that.Receiver(that.recv_url, that.AjaxObject);
      var msg_counter = 0;
      poll.onmessage = function(e) {
          msg_counter += 1;
          that.ri._didMessage(e.data);
      };
      poll.onclose = function(e) {
          that.poll = poll = poll.onmessage = poll.onclose = null;
          if (!that.poll_is_closing) {
              if (e.reason === 'permanent') {
                  that.ri._didClose(1006, 'Polling error (' + e.reason + ')');
              } else {
                  that._scheduleRecv();
              }
          }
      };
  };
  
  Polling.prototype.abort = function() {
      var that = this;
      that.poll_is_closing = true;
      if (that.poll) {
          that.poll.abort();
      }
  };
  //         [*] End of lib/trans-polling.js
  
  
  //         [*] Including lib/trans-receiver-eventsource.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var EventSourceReceiver = function(url) {
      var that = this;
      var es = new EventSource(url);
      es.onmessage = function(e) {
          that.dispatchEvent(new SimpleEvent('message',
                                             {'data': unescape(e.data)}));
      };
      that.es_close = es.onerror = function(e, abort_reason) {
          // ES on reconnection has readyState = 0 or 1.
          // on network error it's CLOSED = 2
          var reason = abort_reason ? 'user' :
              (es.readyState !== 2 ? 'network' : 'permanent');
          that.es_close = es.onmessage = es.onerror = null;
          // EventSource reconnects automatically.
          es.close();
          es = null;
          // Safari and chrome < 15 crash if we close window before
          // waiting for ES cleanup. See:
          //   https://code.google.com/p/chromium/issues/detail?id=89155
          utils.delay(200, function() {
                          that.dispatchEvent(new SimpleEvent('close', {reason: reason}));
                      });
      };
  };
  
  EventSourceReceiver.prototype = new REventTarget();
  
  EventSourceReceiver.prototype.abort = function() {
      var that = this;
      if (that.es_close) {
          that.es_close({}, true);
      }
  };
  //         [*] End of lib/trans-receiver-eventsource.js
  
  
  //         [*] Including lib/trans-receiver-htmlfile.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var _is_ie_htmlfile_capable;
  var isIeHtmlfileCapable = function() {
      if (_is_ie_htmlfile_capable === undefined) {
          if ('ActiveXObject' in _window) {
              try {
                  _is_ie_htmlfile_capable = !!new ActiveXObject('htmlfile');
              } catch (x) {}
          } else {
              _is_ie_htmlfile_capable = false;
          }
      }
      return _is_ie_htmlfile_capable;
  };
  
  
  var HtmlfileReceiver = function(url) {
      var that = this;
      utils.polluteGlobalNamespace();
  
      that.id = 'a' + utils.random_string(6, 26);
      url += ((url.indexOf('?') === -1) ? '?' : '&') +
          'c=' + escape(WPrefix + '.' + that.id);
  
      var constructor = isIeHtmlfileCapable() ?
          utils.createHtmlfile : utils.createIframe;
  
      var iframeObj;
      _window[WPrefix][that.id] = {
          start: function () {
              iframeObj.loaded();
          },
          message: function (data) {
              that.dispatchEvent(new SimpleEvent('message', {'data': data}));
          },
          stop: function () {
              that.iframe_close({}, 'network');
          }
      };
      that.iframe_close = function(e, abort_reason) {
          iframeObj.cleanup();
          that.iframe_close = iframeObj = null;
          delete _window[WPrefix][that.id];
          that.dispatchEvent(new SimpleEvent('close', {reason: abort_reason}));
      };
      iframeObj = constructor(url, function(e) {
                                  that.iframe_close({}, 'permanent');
                              });
  };
  
  HtmlfileReceiver.prototype = new REventTarget();
  
  HtmlfileReceiver.prototype.abort = function() {
      var that = this;
      if (that.iframe_close) {
          that.iframe_close({}, 'user');
      }
  };
  //         [*] End of lib/trans-receiver-htmlfile.js
  
  
  //         [*] Including lib/trans-receiver-xhr.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  var XhrReceiver = function(url, AjaxObject) {
      var that = this;
      var buf_pos = 0;
  
      that.xo = new AjaxObject('POST', url, null);
      that.xo.onchunk = function(status, text) {
          if (status !== 200) return;
          while (1) {
              var buf = text.slice(buf_pos);
              var p = buf.indexOf('\n');
              if (p === -1) break;
              buf_pos += p+1;
              var msg = buf.slice(0, p);
              that.dispatchEvent(new SimpleEvent('message', {data: msg}));
          }
      };
      that.xo.onfinish = function(status, text) {
          that.xo.onchunk(status, text);
          that.xo = null;
          var reason = status === 200 ? 'network' : 'permanent';
          that.dispatchEvent(new SimpleEvent('close', {reason: reason}));
      }
  };
  
  XhrReceiver.prototype = new REventTarget();
  
  XhrReceiver.prototype.abort = function() {
      var that = this;
      if (that.xo) {
          that.xo.close();
          that.dispatchEvent(new SimpleEvent('close', {reason: 'user'}));
          that.xo = null;
      }
  };
  //         [*] End of lib/trans-receiver-xhr.js
  
  
  //         [*] Including lib/test-hooks.js
  /*
   * ***** BEGIN LICENSE BLOCK *****
   * Copyright (c) 2011-2012 VMware, Inc.
   *
   * For the license see COPYING.
   * ***** END LICENSE BLOCK *****
   */
  
  // For testing
  SockJS.getUtils = function(){
      return utils;
  };
  
  SockJS.getIframeTransport = function(){
      return IframeTransport;
  };
  //         [*] End of lib/test-hooks.js
  
                    return SockJS;
            })();
  if ('_sockjs_onload' in window) setTimeout(_sockjs_onload, 1);
  
  // AMD compliance
  if (typeof define === 'function' && define.amd) {
      define('sockjs', [], function(){return SockJS;});
  }
  //     [*] End of lib/index.js
  
  // [*] End of lib/all.js
  