diff --git a/docs/THIRDPARTY b/docs/THIRDPARTY
index e905ccc22f..392331daaf 100644
--- a/docs/THIRDPARTY
+++ b/docs/THIRDPARTY
@@ -175,11 +175,6 @@ Files: static/third/string-prototype-codepointat/*
 Copyright: 2014 Mathias Bynens
 License: Expat
 
-Files: static/third/sockjs/sockjs-0.3.4.js
-Copyright: 2011-2012 VMware, Inc.
- 2012 Douglas Crockford
-License: Expat and public-domain
-
 Files: static/third/sorttable/sorttable.js
 Copyright: 2007 Stuart Langridge
 License: X11
diff --git a/package.json b/package.json
index 36f4c947a4..bd2e49fe7f 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "description": "",
   "main": "",
   "dependencies": {
+    "browserify": "13.1.1",
     "handlebars": "1.3.0",
     "i18next": "3.0.0",
     "i18next-parser": "0.7.0",
@@ -13,6 +14,7 @@
     "i18next-localstorage-cache": "0.3.0",
     "jquery": "1.12.1",
     "jquery-validation": "1.15.1",
+    "sockjs-client":"1.1.1",
     "webpack": "1.12.2"
   },
   "devDependencies": {
@@ -28,6 +30,7 @@
     "xmlhttprequest": "1.5.0"
   },
   "scripts": {
+    "postinstall": "browserify node_modules/sockjs-client/lib/entry.js --standalone SockJS > node_modules/sockjs-client/sockjs.js",
     "lint": "eslint --quiet",
     "lint-loud": "eslint static/js frontend_tests"
   },
diff --git a/static/js/socket.js b/static/js/socket.js
index 66420eb71d..edc635e0d7 100644
--- a/static/js/socket.js
+++ b/static/js/socket.js
@@ -55,7 +55,7 @@ function Socket(url) {
 
 Socket.prototype = {
     _create_sockjs_object: function Socket__create_sockjs_object() {
-        this._sockjs = new SockJS(this.url, null, {protocols_whitelist: this._supported_protocols});
+        this._sockjs = new SockJS(this.url, null, {transports: this._supported_protocols});
         this._setup_sockjs_callbacks(this._sockjs);
     },
 
diff --git a/static/third/sockjs/sockjs-0.3.4.js b/static/third/sockjs/sockjs-0.3.4.js
deleted file mode 100644
index c1acc52003..0000000000
--- a/static/third/sockjs/sockjs-0.3.4.js
+++ /dev/null
@@ -1,2384 +0,0 @@
-/** @preserve
- Software from "SockJS" is Copyright (c) 2011-2012 VMware, Inc. and is provided
- under the following license (the SockJS software has been modified):
- --
- Permission is hereby granted, free of charge, to any person obtaining a copy
- of this software and associated documentation files (the "Software"), to deal
- in the Software without restriction, including without limitation the rights
- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- copies of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
-
- The above copyright notice and this permission notice shall be included in
- all copies or substantial portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- THE SOFTWARE.
- --
-*/
-
-// 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)
-            return;
-    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;
-
-    // Zulip Addition: Notify that we're about to start the
-    // WebSocket handshake
-    $(document).trigger($.Event('websocket_preopen.zulip', {}));
-
-    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?cb=' + utils.random_string(10));
-
-    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
-
diff --git a/zerver/tornado/socket.py b/zerver/tornado/socket.py
index c9c9e3b9f9..b5a3679ba0 100644
--- a/zerver/tornado/socket.py
+++ b/zerver/tornado/socket.py
@@ -305,7 +305,7 @@ def respond_send_message(data):
 # securely send us the zulip.com cookie, which we use as part of our
 # authentication scheme.
 sockjs_router = sockjs.tornado.SockJSRouter(SocketConnection, "/sockjs",
-                                            {'sockjs_url': 'https://%s/static/third/sockjs/sockjs-0.3.4.js' % (
+                                            {'sockjs_url': 'https://%s/node_modules/sockjs-client/sockjs.js' % (
                                                                 settings.EXTERNAL_HOST,),
                                              'disabled_transports': ['eventsource', 'htmlfile']})
 def get_sockjs_router():
diff --git a/zproject/settings.py b/zproject/settings.py
index acea361e27..1f7bf12be0 100644
--- a/zproject/settings.py
+++ b/zproject/settings.py
@@ -709,7 +709,6 @@ PIPELINE = {
     },
     'JAVASCRIPT': {},
 }
-
 JS_SPECS = {
     'common': {
         'source_filenames': (
@@ -741,6 +740,7 @@ JS_SPECS = {
             'third/bootstrap-notify/js/bootstrap-notify.js',
             'third/html5-formdata/formdata.js',
             'node_modules/jquery-validation/dist/jquery.validate.js',
+            'node_modules/sockjs-client/sockjs.js',
             'third/jquery-form/jquery.form.js',
             'third/jquery-filedrop/jquery.filedrop.js',
             'third/jquery-caret/jquery.caret.1.5.2.js',
@@ -755,7 +755,6 @@ JS_SPECS = {
             'third/spectrum/spectrum.js',
             'third/string-prototype-codepointat/codepointat.js',
             'third/winchan/winchan.js',
-            'third/sockjs/sockjs-0.3.4.js',
             'third/handlebars/handlebars.runtime.js',
             'third/marked/lib/marked.js',
             'templates/compiled.js',
@@ -842,8 +841,8 @@ JS_SPECS = {
     },
     # We also want to minify sockjs separately for the sockjs iframe transport
     'sockjs': {
-        'source_filenames': ('third/sockjs/sockjs-0.3.4.js',),
-        'output_filename': 'min/sockjs-0.3.4.min.js'
+        'source_filenames': ('node_modules/sockjs-client/sockjs.js',),
+        'output_filename': 'min/sockjs.min.js'
     },
 }