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vue使用远程在线更新代码

一、main.js

 1 import Vue from 'vue'
 2 import App from './App'
 3 import router from './router'
 4 import Vuex from 'vuex'
 5 import store from './store'
 6 import axios from 'axios'
 7 import VueAwesomeSwiper from 'vue-awesome-swiper'
 8 import 'swiper/dist/css/swiper.css'
 9 // import VueSocketio from 'vue-socket.io'
10 
11 Vue.config.productionTip = false
12 Vue.use(Vuex)
13 // Vue.use(VueSocketio)
14 
15 
16 var ls_mac = "_ioBox_mac_code_key_";
17 var ls_proid = "_io_ioBox_pro_id_key_";
18 var ls_protitle = "_io_ioBox_title_key_";
19 
20 //检查mac地址缓存
21 var macCode = localStorage.getItem(ls_mac);
22 console.log("macCode",macCode)
23 if(!macCode){
24   console.log("macCode222",macCode)
25   //没有则生成mac,提交设备号
26   NWBridge && NWBridge.getMac((mac) => {
27       //alert(str);
28       macCode = mac;
29       localStorage.setItem(ls_mac,macCode);
30       ini && ini.setString('',macCode,()=>{},ini.fileName.macCode);
31     var zipFormData = new FormData();
32     console.log("macCode333",macCode)
33     zipFormData.append('mac',macCode);
34     zipFormData.append('title',"北京65box(抽奖)");
35 
36     return axios.post('http://iboxmanager.ioart.cn/Api/add/module/device/key/dac509bd90a82719a3569291e12c24a6f1af4bac/',zipFormData).then((res) => {
37       console.log("macCode444",res.data.error_code)
38       console.log("macCode555",res.data.error_code == 0)
39       if (res.data.error_code == 0) {
40 
41         NWBridge.checkUpdate();
42         //增加监听
43         autoUpdateSocket(macCode);
44       }
45     }).catch(function (error) {
46       console.log(error);
47     })
48 
49     }
50   );
51 }else{
52   //检查更新
53   NWBridge.checkUpdate();
54   //增加监听
55   autoUpdateSocket(macCode);
56 }
57 
58 
59 function autoUpdateSocket(mac) {
60   //监听 用于自动升级处理
61   var socket = io('http://msgsender.ioart.cn:2120');
62   //建立连接后
63   socket.on('connect', function() {
64     socket.emit('login',mac);
65   });
66   //接收通信
67   socket.on('coffeeorder', function(msg){
68     NWBridge.checkUpdate();
69   });
70 }
71 
72 
73 /* eslint-disable no-new */
74 new Vue({
75   el: '#app',
76   router,
77   store,
78   components: { App },
79   template: '<App/>'
80 })

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二、index.html

 1 <!DOCTYPE html>
 2 <html>
 3   <head>
 4     <meta charset="utf-8">
 5     <meta name="viewport" content="width=device-width,initial-scale=1.0">
 6     <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />
 7     <title>my-project</title>
 8   </head>
 9   <body style="overflow:hidden;">
10 
11   <script src="../static/js/md5.min.js?v=1547962386444"></script>
12   <script src="../static/js/ini.js?v=1547962386444"></script>
13   <script src="../static/js/NWBridge.js?v=1547962386444"></script>
14   <script src="../static/js/socket.io.js?v=<%= htmlWebpackPlugin.options.version %>"></script>
15     <div id="app"></div>
16     <!-- built files will be auto injected -->
17   </body>
18 </html>

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三、ini.js (直接引入)

 1 var ini = (function () {
 2  var that;
 3  /*将ini文件更新到res目录统计，防止更新时覆盖此文件*/
 4  var  fs = require && require("fs") || null;
 5  var obj = function () {
 6   that = this;
 7   that.fileName = {
 8    config: '../config.ini',
 9    macCode: '../macCode.txt'
10   };
11  };
12  obj.prototype = {
13   set: function (key, value, callback, file) {
14    var cf = this._readFile(file || that.fileName.config);
15    cf[key] = value;
16 
17    fs.writeFile(file || that.fileName.config, JSON.stringify(cf), function (err) {
18     if (err) throw err;
19 
20     if (typeof callback == "function") callback();
21    });
22   },
23 
24   setString: function (key, value, callback, file) {
25    var cf = this._readFile(file, true);
26    cf[key] = value;
27             fs && fs.writeFile(file || that.fileName.config, value, function (err) {
28     if (err) throw err;
29     if (typeof callback == "function") callback();
30    });
31   },
32 
33   setSync: function (key, value, callback, file) {
34    var cf = this._readFile(file || that.fileName.config);
35    cf[key] = value;
36             fs && fs.writeFileSync(file || that.fileName.config, JSON.stringify(cf));
37   },
38 
39   get: function (key, file) {
40    var cf = this._readFile(file || that.fileName.config);
41    return cf[key] || '';
42   },
43         getString: function (key, file) {
44             var cf = this._readFile(file || that.fileName.config, true);
45             return cf[key] || '';
46         },
47   getAll: function (file) {
48    var cf = this._readFile(file || that.fileName.config);
49    return cf;
50   },
51 
52   _readFile: function (file, defaultValue) {
53    //file = file || fileName;
54 
55    if (file) {
56     return this._writeFile(file, defaultValue);
57    } else {
58     for (var i = 0; i < that.fileName.length; i++) {
59      this._writeFile(that.fileName.config, defaultValue);
60     }
61    }
62   },
63   _writeFile: function (file, defaultValue) {
64    if (!fs) return '';
65    if (!fs.existsSync(file)) {
66     fs.writeFile(file, (!defaultValue ? '{}' : ''), function (err) {
67      if (err) throw err;
68     });
69     return {};
70    }
71 
72    var str = fs.readFileSync(file);
73    try {
74     return JSON.parse(str);
75    } catch (e) {
76     return {};
77    }
78   }
79  };
80 
81  return new obj();
82 })();

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四、md5.min.js（直接引入）

1 !function(a){"use strict";function b(a,b){var c=(65535&a)+(65535&b),d=(a>>16)+(b>>16)+(c>>16);return d<<16|65535&c}function c(a,b){return a<<b|a>>>32-b}function d(a,d,e,f,g,h){return b(c(b(b(d,a),b(f,h)),g),e)}function e(a,b,c,e,f,g,h){return d(b&c|~b&e,a,b,f,g,h)}function f(a,b,c,e,f,g,h){return d(b&e|c&~e,a,b,f,g,h)}function g(a,b,c,e,f,g,h){return d(b^c^e,a,b,f,g,h)}function h(a,b,c,e,f,g,h){return d(c^(b|~e),a,b,f,g,h)}function i(a,c){a[c>>5]|=128<<c%32,a[(c+64>>>9<<4)+14]=c;var d,i,j,k,l,m=1732584193,n=-271733879,o=-1732584194,p=271733878;for(d=0;d<a.length;d+=16)i=m,j=n,k=o,l=p,m=e(m,n,o,p,a[d],7,-680876936),p=e(p,m,n,o,a[d+1],12,-389564586),o=e(o,p,m,n,a[d+2],17,606105819),n=e(n,o,p,m,a[d+3],22,-1044525330),m=e(m,n,o,p,a[d+4],7,-176418897),p=e(p,m,n,o,a[d+5],12,1200080426),o=e(o,p,m,n,a[d+6],17,-1473231341),n=e(n,o,p,m,a[d+7],22,-45705983),m=e(m,n,o,p,a[d+8],7,1770035416),p=e(p,m,n,o,a[d+9],12,-1958414417),o=e(o,p,m,n,a[d+10],17,-42063),n=e(n,o,p,m,a[d+11],22,-1990404162),m=e(m,n,o,p,a[d+12],7,1804603682),p=e(p,m,n,o,a[d+13],12,-40341101),o=e(o,p,m,n,a[d+14],17,-1502002290),n=e(n,o,p,m,a[d+15],22,1236535329),m=f(m,n,o,p,a[d+1],5,-165796510),p=f(p,m,n,o,a[d+6],9,-1069501632),o=f(o,p,m,n,a[d+11],14,643717713),n=f(n,o,p,m,a[d],20,-373897302),m=f(m,n,o,p,a[d+5],5,-701558691),p=f(p,m,n,o,a[d+10],9,38016083),o=f(o,p,m,n,a[d+15],14,-660478335),n=f(n,o,p,m,a[d+4],20,-405537848),m=f(m,n,o,p,a[d+9],5,568446438),p=f(p,m,n,o,a[d+14],9,-1019803690),o=f(o,p,m,n,a[d+3],14,-187363961),n=f(n,o,p,m,a[d+8],20,1163531501),m=f(m,n,o,p,a[d+13],5,-1444681467),p=f(p,m,n,o,a[d+2],9,-51403784),o=f(o,p,m,n,a[d+7],14,1735328473),n=f(n,o,p,m,a[d+12],20,-1926607734),m=g(m,n,o,p,a[d+5],4,-378558),p=g(p,m,n,o,a[d+8],11,-2022574463),o=g(o,p,m,n,a[d+11],16,1839030562),n=g(n,o,p,m,a[d+14],23,-35309556),m=g(m,n,o,p,a[d+1],4,-1530992060),p=g(p,m,n,o,a[d+4],11,1272893353),o=g(o,p,m,n,a[d+7],16,-155497632),n=g(n,o,p,m,a[d+10],23,-1094730640),m=g(m,n,o,p,a[d+13],4,681279174),p=g(p,m,n,o,a[d],11,-358537222),o=g(o,p,m,n,a[d+3],16,-722521979),n=g(n,o,p,m,a[d+6],23,76029189),m=g(m,n,o,p,a[d+9],4,-640364487),p=g(p,m,n,o,a[d+12],11,-421815835),o=g(o,p,m,n,a[d+15],16,530742520),n=g(n,o,p,m,a[d+2],23,-995338651),m=h(m,n,o,p,a[d],6,-198630844),p=h(p,m,n,o,a[d+7],10,1126891415),o=h(o,p,m,n,a[d+14],15,-1416354905),n=h(n,o,p,m,a[d+5],21,-57434055),m=h(m,n,o,p,a[d+12],6,1700485571),p=h(p,m,n,o,a[d+3],10,-1894986606),o=h(o,p,m,n,a[d+10],15,-1051523),n=h(n,o,p,m,a[d+1],21,-2054922799),m=h(m,n,o,p,a[d+8],6,1873313359),p=h(p,m,n,o,a[d+15],10,-30611744),o=h(o,p,m,n,a[d+6],15,-1560198380),n=h(n,o,p,m,a[d+13],21,1309151649),m=h(m,n,o,p,a[d+4],6,-145523070),p=h(p,m,n,o,a[d+11],10,-1120210379),o=h(o,p,m,n,a[d+2],15,718787259),n=h(n,o,p,m,a[d+9],21,-343485551),m=b(m,i),n=b(n,j),o=b(o,k),p=b(p,l);return[m,n,o,p]}function j(a){var b,c="";for(b=0;b<32*a.length;b+=8)c+=String.fromCharCode(a[b>>5]>>>b%32&255);return c}function k(a){var b,c=[];for(c[(a.length>>2)-1]=void 0,b=0;b<c.length;b+=1)c[b]=0;for(b=0;b<8*a.length;b+=8)c[b>>5]|=(255&a.charCodeAt(b/8))<<b%32;return c}function l(a){return j(i(k(a),8*a.length))}function m(a,b){var c,d,e=k(a),f=[],g=[];for(f[15]=g[15]=void 0,e.length>16&&(e=i(e,8*a.length)),c=0;16>c;c+=1)f[c]=909522486^e[c],g[c]=1549556828^e[c];return d=i(f.concat(k(b)),512+8*b.length),j(i(g.concat(d),640))}function n(a){var b,c,d="0123456789abcdef",e="";for(c=0;c<a.length;c+=1)b=a.charCodeAt(c),e+=d.charAt(b>>>4&15)+d.charAt(15&b);return e}function o(a){return unescape(encodeURIComponent(a))}function p(a){return l(o(a))}function q(a){return n(p(a))}function r(a,b){return m(o(a),o(b))}function s(a,b){return n(r(a,b))}function t(a,b,c){return b?c?r(b,a):s(b,a):c?p(a):q(a)}"function"==typeof define&&define.amd?define(function(){return t}):a.md5=t}(this);

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五、NWBridge.js（直接引入）

 1 /**
 2  * Created by Administrator on 2017/10/17 0017.
 3  */
 4 var NWBridge = (function (){
 5     var that;
 6     var obj = function () {
 7         that = this;
 8         if (top.require) {
 9             that.http = top.require('http');
10             that.https = top.require('https');
11             that.mac = top.require("getmac");
12             that.nodePath = top.require('path');
13             that.exec = top.require('child_process').exec;
14             that.spawn = top.require('child_process').spawn;
15         }
16     };
17     obj.prototype = {
18         getMac: (callback) => {
19             that.mac && that.mac.getMac(function (err, macAddress) {
20                 if (err) throw err;
21                 var macCode = md5(macAddress);
22                 callback(macCode);
23             });
24         },
25         checkAutoUpdaterTwo: (callback) => {
26             if ( !top.require) return;
27             var fs = top.require('fs');
28             var pathParent = that.nodePath.dirname(process.cwd());
29             fs.exists(pathParent + '\autoUpdate2.exe', (exists) => {
30                 if (exists) {
31                     var unlinkName = '\autoUpdate.exe';
32                     fs.exists(pathParent + unlinkName, (flag) => {
33                         if (flag) {
34                             fs.unlink(pathParent + unlinkName,  (err) =>{
35                                 if ( err ) console.log('ERROR: ' + err);
36                                 fs.rename(pathParent + '\autoUpdate2.exe', pathParent + '\autoUpdate.exe', (err) =>{
37                                     if ( err ) console.log('ERROR: ' + err);
38                                     callback && callback();
39                                 });
40                             });
41                         } else {
42                             callback && callback();
43                         }
44                     });
45                 } else {
46                     callback && callback();
47                 }
48             });
49         },
50         checkUpdate: (callback) => {
51             // 加 "" 是因为 直接执行路径有空格时会抛异常 所以需要加双引号当成一个字符串
52             that.lsUpdate = that.exec('"' + that.nodePath.dirname(process.cwd())  + '\autoUpdate.exe' + '"',
53                  (error, stdout, stderr) => {
54                     console.log('stdout: ' + stdout);
55                     console.log('stderr: ' + stderr);
56                     if (error !== null) {
57                         console.log('exec error: ' + error);
58                     }
59                 });
60             that.lsUpdate.stdout.on('data',  (data)  => {
61                 if (data) {
62                     if (eval(data)) {
63                         setTimeout( ()  =>{
64                             var gui = top.require('nw.gui');
65                             gui.Window.get().close();
66                         }, 2000);
67                     } else {
68                         callback && callback();
69                     }
70                 } else {
71                     callback && callback();
72                 }
73             });
74 
75             that.lsUpdate.stderr.on('data', (data)  => {
76                 that.lsUpdate.kill();
77                 console.error('stderr: ' + data);
78             });
79 
80             that.lsUpdate.on('close',(code)  =>{
81                 that.lsUpdate.kill();
82                 callback && callback();
83             });
84             return that.lsUpdate;
85         }
86     };
87     return new obj();
88 })();

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六、socket.io.js（直接引入）

   1 !function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.io=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
   2 
   3 module.exports = _dereq_('./lib/');
   4 
   5 },{"./lib/":2}],2:[function(_dereq_,module,exports){
   6 
   7 /**
   8  * Module dependencies.
   9  */
  10 
  11 var url = _dereq_('./url');
  12 var parser = _dereq_('socket.io-parser');
  13 var Manager = _dereq_('./manager');
  14 var debug = _dereq_('debug')('socket.io-client');
  15 
  16 /**
  17  * Module exports.
  18  */
  19 
  20 module.exports = exports = lookup;
  21 
  22 /**
  23  * Managers cache.
  24  */
  25 
  26 var cache = exports.managers = {};
  27 
  28 /**
  29  * Looks up an existing `Manager` for multiplexing.
  30  * If the user summons:
  31  *
  32  *   `io('http://localhost/a');`
  33  *   `io('http://localhost/b');`
  34  *
  35  * We reuse the existing instance based on same scheme/port/host,
  36  * and we initialize sockets for each namespace.
  37  *
  38  * @api public
  39  */
  40 
  41 function lookup(uri, opts) {
  42   if (typeof uri == 'object') {
  43     opts = uri;
  44     uri = undefined;
  45   }
  46 
  47   opts = opts || {};
  48 
  49   var parsed = url(uri);
  50   var source = parsed.source;
  51   var id = parsed.id;
  52   var io;
  53 
  54   if (opts.forceNew || opts['force new connection'] || false === opts.multiplex) {
  55     debug('ignoring socket cache for %s', source);
  56     io = Manager(source, opts);
  57   } else {
  58     if (!cache[id]) {
  59       debug('new io instance for %s', source);
  60       cache[id] = Manager(source, opts);
  61     }
  62     io = cache[id];
  63   }
  64 
  65   return io.socket(parsed.path);
  66 }
  67 
  68 /**
  69  * Protocol version.
  70  *
  71  * @api public
  72  */
  73 
  74 exports.protocol = parser.protocol;
  75 
  76 /**
  77  * `connect`.
  78  *
  79  * @param {String} uri
  80  * @api public
  81  */
  82 
  83 exports.connect = lookup;
  84 
  85 /**
  86  * Expose constructors for standalone build.
  87  *
  88  * @api public
  89  */
  90 
  91 exports.Manager = _dereq_('./manager');
  92 exports.Socket = _dereq_('./socket');
  93 
  94 },{"./manager":3,"./socket":5,"./url":6,"debug":10,"socket.io-parser":44}],3:[function(_dereq_,module,exports){
  95 
  96 /**
  97  * Module dependencies.
  98  */
  99 
 100 var url = _dereq_('./url');
 101 var eio = _dereq_('engine.io-client');
 102 var Socket = _dereq_('./socket');
 103 var Emitter = _dereq_('component-emitter');
 104 var parser = _dereq_('socket.io-parser');
 105 var on = _dereq_('./on');
 106 var bind = _dereq_('component-bind');
 107 var object = _dereq_('object-component');
 108 var debug = _dereq_('debug')('socket.io-client:manager');
 109 var indexOf = _dereq_('indexof');
 110 var Backoff = _dereq_('backo2');
 111 
 112 /**
 113  * Module exports
 114  */
 115 
 116 module.exports = Manager;
 117 
 118 /**
 119  * `Manager` constructor.
 120  *
 121  * @param {String} engine instance or engine uri/opts
 122  * @param {Object} options
 123  * @api public
 124  */
 125 
 126 function Manager(uri, opts){
 127   if (!(this instanceof Manager)) return new Manager(uri, opts);
 128   if (uri && ('object' == typeof uri)) {
 129     opts = uri;
 130     uri = undefined;
 131   }
 132   opts = opts || {};
 133 
 134   opts.path = opts.path || '/socket.io';
 135   this.nsps = {};
 136   this.subs = [];
 137   this.opts = opts;
 138   this.reconnection(opts.reconnection !== false);
 139   this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
 140   this.reconnectionDelay(opts.reconnectionDelay || 1000);
 141   this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
 142   this.randomizationFactor(opts.randomizationFactor || 0.5);
 143   this.backoff = new Backoff({
 144     min: this.reconnectionDelay(),
 145     max: this.reconnectionDelayMax(),
 146     jitter: this.randomizationFactor()
 147   });
 148   this.timeout(null == opts.timeout ? 20000 : opts.timeout);
 149   this.readyState = 'closed';
 150   this.uri = uri;
 151   this.connected = [];
 152   this.encoding = false;
 153   this.packetBuffer = [];
 154   this.encoder = new parser.Encoder();
 155   this.decoder = new parser.Decoder();
 156   this.autoConnect = opts.autoConnect !== false;
 157   if (this.autoConnect) this.open();
 158 }
 159 
 160 /**
 161  * Propagate given event to sockets and emit on `this`
 162  *
 163  * @api private
 164  */
 165 
 166 Manager.prototype.emitAll = function() {
 167   this.emit.apply(this, arguments);
 168   for (var nsp in this.nsps) {
 169     this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
 170   }
 171 };
 172 
 173 /**
 174  * Update `socket.id` of all sockets
 175  *
 176  * @api private
 177  */
 178 
 179 Manager.prototype.updateSocketIds = function(){
 180   for (var nsp in this.nsps) {
 181     this.nsps[nsp].id = this.engine.id;
 182   }
 183 };
 184 
 185 /**
 186  * Mix in `Emitter`.
 187  */
 188 
 189 Emitter(Manager.prototype);
 190 
 191 /**
 192  * Sets the `reconnection` config.
 193  *
 194  * @param {Boolean} true/false if it should automatically reconnect
 195  * @return {Manager} self or value
 196  * @api public
 197  */
 198 
 199 Manager.prototype.reconnection = function(v){
 200   if (!arguments.length) return this._reconnection;
 201   this._reconnection = !!v;
 202   return this;
 203 };
 204 
 205 /**
 206  * Sets the reconnection attempts config.
 207  *
 208  * @param {Number} max reconnection attempts before giving up
 209  * @return {Manager} self or value
 210  * @api public
 211  */
 212 
 213 Manager.prototype.reconnectionAttempts = function(v){
 214   if (!arguments.length) return this._reconnectionAttempts;
 215   this._reconnectionAttempts = v;
 216   return this;
 217 };
 218 
 219 /**
 220  * Sets the delay between reconnections.
 221  *
 222  * @param {Number} delay
 223  * @return {Manager} self or value
 224  * @api public
 225  */
 226 
 227 Manager.prototype.reconnectionDelay = function(v){
 228   if (!arguments.length) return this._reconnectionDelay;
 229   this._reconnectionDelay = v;
 230   this.backoff && this.backoff.setMin(v);
 231   return this;
 232 };
 233 
 234 Manager.prototype.randomizationFactor = function(v){
 235   if (!arguments.length) return this._randomizationFactor;
 236   this._randomizationFactor = v;
 237   this.backoff && this.backoff.setJitter(v);
 238   return this;
 239 };
 240 
 241 /**
 242  * Sets the maximum delay between reconnections.
 243  *
 244  * @param {Number} delay
 245  * @return {Manager} self or value
 246  * @api public
 247  */
 248 
 249 Manager.prototype.reconnectionDelayMax = function(v){
 250   if (!arguments.length) return this._reconnectionDelayMax;
 251   this._reconnectionDelayMax = v;
 252   this.backoff && this.backoff.setMax(v);
 253   return this;
 254 };
 255 
 256 /**
 257  * Sets the connection timeout. `false` to disable
 258  *
 259  * @return {Manager} self or value
 260  * @api public
 261  */
 262 
 263 Manager.prototype.timeout = function(v){
 264   if (!arguments.length) return this._timeout;
 265   this._timeout = v;
 266   return this;
 267 };
 268 
 269 /**
 270  * Starts trying to reconnect if reconnection is enabled and we have not
 271  * started reconnecting yet
 272  *
 273  * @api private
 274  */
 275 
 276 Manager.prototype.maybeReconnectOnOpen = function() {
 277   // Only try to reconnect if it's the first time we're connecting
 278   if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
 279     // keeps reconnection from firing twice for the same reconnection loop
 280     this.reconnect();
 281   }
 282 };
 283 
 284 
 285 /**
 286  * Sets the current transport `socket`.
 287  *
 288  * @param {Function} optional, callback
 289  * @return {Manager} self
 290  * @api public
 291  */
 292 
 293 Manager.prototype.open =
 294 Manager.prototype.connect = function(fn){
 295   debug('readyState %s', this.readyState);
 296   if (~this.readyState.indexOf('open')) return this;
 297 
 298   debug('opening %s', this.uri);
 299   this.engine = eio(this.uri, this.opts);
 300   var socket = this.engine;
 301   var self = this;
 302   this.readyState = 'opening';
 303   this.skipReconnect = false;
 304 
 305   // emit `open`
 306   var openSub = on(socket, 'open', function() {
 307     self.onopen();
 308     fn && fn();
 309   });
 310 
 311   // emit `connect_error`
 312   var errorSub = on(socket, 'error', function(data){
 313     debug('connect_error');
 314     self.cleanup();
 315     self.readyState = 'closed';
 316     self.emitAll('connect_error', data);
 317     if (fn) {
 318       var err = new Error('Connection error');
 319       err.data = data;
 320       fn(err);
 321     } else {
 322       // Only do this if there is no fn to handle the error
 323       self.maybeReconnectOnOpen();
 324     }
 325   });
 326 
 327   // emit `connect_timeout`
 328   if (false !== this._timeout) {
 329     var timeout = this._timeout;
 330     debug('connect attempt will timeout after %d', timeout);
 331 
 332     // set timer
 333     var timer = setTimeout(function(){
 334       debug('connect attempt timed out after %d', timeout);
 335       openSub.destroy();
 336       socket.close();
 337       socket.emit('error', 'timeout');
 338       self.emitAll('connect_timeout', timeout);
 339     }, timeout);
 340 
 341     this.subs.push({
 342       destroy: function(){
 343         clearTimeout(timer);
 344       }
 345     });
 346   }
 347 
 348   this.subs.push(openSub);
 349   this.subs.push(errorSub);
 350 
 351   return this;
 352 };
 353 
 354 /**
 355  * Called upon transport open.
 356  *
 357  * @api private
 358  */
 359 
 360 Manager.prototype.onopen = function(){
 361   debug('open');
 362 
 363   // clear old subs
 364   this.cleanup();
 365 
 366   // mark as open
 367   this.readyState = 'open';
 368   this.emit('open');
 369 
 370   // add new subs
 371   var socket = this.engine;
 372   this.subs.push(on(socket, 'data', bind(this, 'ondata')));
 373   this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
 374   this.subs.push(on(socket, 'error', bind(this, 'onerror')));
 375   this.subs.push(on(socket, 'close', bind(this, 'onclose')));
 376 };
 377 
 378 /**
 379  * Called with data.
 380  *
 381  * @api private
 382  */
 383 
 384 Manager.prototype.ondata = function(data){
 385   this.decoder.add(data);
 386 };
 387 
 388 /**
 389  * Called when parser fully decodes a packet.
 390  *
 391  * @api private
 392  */
 393 
 394 Manager.prototype.ondecoded = function(packet) {
 395   this.emit('packet', packet);
 396 };
 397 
 398 /**
 399  * Called upon socket error.
 400  *
 401  * @api private
 402  */
 403 
 404 Manager.prototype.onerror = function(err){
 405   debug('error', err);
 406   this.emitAll('error', err);
 407 };
 408 
 409 /**
 410  * Creates a new socket for the given `nsp`.
 411  *
 412  * @return {Socket}
 413  * @api public
 414  */
 415 
 416 Manager.prototype.socket = function(nsp){
 417   var socket = this.nsps[nsp];
 418   if (!socket) {
 419     socket = new Socket(this, nsp);
 420     this.nsps[nsp] = socket;
 421     var self = this;
 422     socket.on('connect', function(){
 423       socket.id = self.engine.id;
 424       if (!~indexOf(self.connected, socket)) {
 425         self.connected.push(socket);
 426       }
 427     });
 428   }
 429   return socket;
 430 };
 431 
 432 /**
 433  * Called upon a socket close.
 434  *
 435  * @param {Socket} socket
 436  */
 437 
 438 Manager.prototype.destroy = function(socket){
 439   var index = indexOf(this.connected, socket);
 440   if (~index) this.connected.splice(index, 1);
 441   if (this.connected.length) return;
 442 
 443   this.close();
 444 };
 445 
 446 /**
 447  * Writes a packet.
 448  *
 449  * @param {Object} packet
 450  * @api private
 451  */
 452 
 453 Manager.prototype.packet = function(packet){
 454   debug('writing packet %j', packet);
 455   var self = this;
 456 
 457   if (!self.encoding) {
 458     // encode, then write to engine with result
 459     self.encoding = true;
 460     this.encoder.encode(packet, function(encodedPackets) {
 461       for (var i = 0; i < encodedPackets.length; i++) {
 462         self.engine.write(encodedPackets[i]);
 463       }
 464       self.encoding = false;
 465       self.processPacketQueue();
 466     });
 467   } else { // add packet to the queue
 468     self.packetBuffer.push(packet);
 469   }
 470 };
 471 
 472 /**
 473  * If packet buffer is non-empty, begins encoding the
 474  * next packet in line.
 475  *
 476  * @api private
 477  */
 478 
 479 Manager.prototype.processPacketQueue = function() {
 480   if (this.packetBuffer.length > 0 && !this.encoding) {
 481     var pack = this.packetBuffer.shift();
 482     this.packet(pack);
 483   }
 484 };
 485 
 486 /**
 487  * Clean up transport subscriptions and packet buffer.
 488  *
 489  * @api private
 490  */
 491 
 492 Manager.prototype.cleanup = function(){
 493   var sub;
 494   while (sub = this.subs.shift()) sub.destroy();
 495 
 496   this.packetBuffer = [];
 497   this.encoding = false;
 498 
 499   this.decoder.destroy();
 500 };
 501 
 502 /**
 503  * Close the current socket.
 504  *
 505  * @api private
 506  */
 507 
 508 Manager.prototype.close =
 509 Manager.prototype.disconnect = function(){
 510   this.skipReconnect = true;
 511   this.backoff.reset();
 512   this.readyState = 'closed';
 513   this.engine && this.engine.close();
 514 };
 515 
 516 /**
 517  * Called upon engine close.
 518  *
 519  * @api private
 520  */
 521 
 522 Manager.prototype.onclose = function(reason){
 523   debug('close');
 524   this.cleanup();
 525   this.backoff.reset();
 526   this.readyState = 'closed';
 527   this.emit('close', reason);
 528   if (this._reconnection && !this.skipReconnect) {
 529     this.reconnect();
 530   }
 531 };
 532 
 533 /**
 534  * Attempt a reconnection.
 535  *
 536  * @api private
 537  */
 538 
 539 Manager.prototype.reconnect = function(){
 540   if (this.reconnecting || this.skipReconnect) return this;
 541 
 542   var self = this;
 543 
 544   if (this.backoff.attempts >= this._reconnectionAttempts) {
 545     debug('reconnect failed');
 546     this.backoff.reset();
 547     this.emitAll('reconnect_failed');
 548     this.reconnecting = false;
 549   } else {
 550     var delay = this.backoff.duration();
 551     debug('will wait %dms before reconnect attempt', delay);
 552 
 553     this.reconnecting = true;
 554     var timer = setTimeout(function(){
 555       if (self.skipReconnect) return;
 556 
 557       debug('attempting reconnect');
 558       self.emitAll('reconnect_attempt', self.backoff.attempts);
 559       self.emitAll('reconnecting', self.backoff.attempts);
 560 
 561       // check again for the case socket closed in above events
 562       if (self.skipReconnect) return;
 563 
 564       self.open(function(err){
 565         if (err) {
 566           debug('reconnect attempt error');
 567           self.reconnecting = false;
 568           self.reconnect();
 569           self.emitAll('reconnect_error', err.data);
 570         } else {
 571           debug('reconnect success');
 572           self.onreconnect();
 573         }
 574       });
 575     }, delay);
 576 
 577     this.subs.push({
 578       destroy: function(){
 579         clearTimeout(timer);
 580       }
 581     });
 582   }
 583 };
 584 
 585 /**
 586  * Called upon successful reconnect.
 587  *
 588  * @api private
 589  */
 590 
 591 Manager.prototype.onreconnect = function(){
 592   var attempt = this.backoff.attempts;
 593   this.reconnecting = false;
 594   this.backoff.reset();
 595   this.updateSocketIds();
 596   this.emitAll('reconnect', attempt);
 597 };
 598 
 599 },{"./on":4,"./socket":5,"./url":6,"backo2":7,"component-bind":8,"component-emitter":9,"debug":10,"engine.io-client":11,"indexof":40,"object-component":41,"socket.io-parser":44}],4:[function(_dereq_,module,exports){
 600 
 601 /**
 602  * Module exports.
 603  */
 604 
 605 module.exports = on;
 606 
 607 /**
 608  * Helper for subscriptions.
 609  *
 610  * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
 611  * @param {String} event name
 612  * @param {Function} callback
 613  * @api public
 614  */
 615 
 616 function on(obj, ev, fn) {
 617   obj.on(ev, fn);
 618   return {
 619     destroy: function(){
 620       obj.removeListener(ev, fn);
 621     }
 622   };
 623 }
 624 
 625 },{}],5:[function(_dereq_,module,exports){
 626 
 627 /**
 628  * Module dependencies.
 629  */
 630 
 631 var parser = _dereq_('socket.io-parser');
 632 var Emitter = _dereq_('component-emitter');
 633 var toArray = _dereq_('to-array');
 634 var on = _dereq_('./on');
 635 var bind = _dereq_('component-bind');
 636 var debug = _dereq_('debug')('socket.io-client:socket');
 637 var hasBin = _dereq_('has-binary');
 638 
 639 /**
 640  * Module exports.
 641  */
 642 
 643 module.exports = exports = Socket;
 644 
 645 /**
 646  * Internal events (blacklisted).
 647  * These events can't be emitted by the user.
 648  *
 649  * @api private
 650  */
 651 
 652 var events = {
 653   connect: 1,
 654   connect_error: 1,
 655   connect_timeout: 1,
 656   disconnect: 1,
 657   error: 1,
 658   reconnect: 1,
 659   reconnect_attempt: 1,
 660   reconnect_failed: 1,
 661   reconnect_error: 1,
 662   reconnecting: 1
 663 };
 664 
 665 /**
 666  * Shortcut to `Emitter#emit`.
 667  */
 668 
 669 var emit = Emitter.prototype.emit;
 670 
 671 /**
 672  * `Socket` constructor.
 673  *
 674  * @api public
 675  */
 676 
 677 function Socket(io, nsp){
 678   this.io = io;
 679   this.nsp = nsp;
 680   this.json = this; // compat
 681   this.ids = 0;
 682   this.acks = {};
 683   if (this.io.autoConnect) this.open();
 684   this.receiveBuffer = [];
 685   this.sendBuffer = [];
 686   this.connected = false;
 687   this.disconnected = true;
 688 }
 689 
 690 /**
 691  * Mix in `Emitter`.
 692  */
 693 
 694 Emitter(Socket.prototype);
 695 
 696 /**
 697  * Subscribe to open, close and packet events
 698  *
 699  * @api private
 700  */
 701 
 702 Socket.prototype.subEvents = function() {
 703   if (this.subs) return;
 704 
 705   var io = this.io;
 706   this.subs = [
 707     on(io, 'open', bind(this, 'onopen')),
 708     on(io, 'packet', bind(this, 'onpacket')),
 709     on(io, 'close', bind(this, 'onclose'))
 710   ];
 711 };
 712 
 713 /**
 714  * "Opens" the socket.
 715  *
 716  * @api public
 717  */
 718 
 719 Socket.prototype.open =
 720 Socket.prototype.connect = function(){
 721   if (this.connected) return this;
 722 
 723   this.subEvents();
 724   this.io.open(); // ensure open
 725   if ('open' == this.io.readyState) this.onopen();
 726   return this;
 727 };
 728 
 729 /**
 730  * Sends a `message` event.
 731  *
 732  * @return {Socket} self
 733  * @api public
 734  */
 735 
 736 Socket.prototype.send = function(){
 737   var args = toArray(arguments);
 738   args.unshift('message');
 739   this.emit.apply(this, args);
 740   return this;
 741 };
 742 
 743 /**
 744  * Override `emit`.
 745  * If the event is in `events`, it's emitted normally.
 746  *
 747  * @param {String} event name
 748  * @return {Socket} self
 749  * @api public
 750  */
 751 
 752 Socket.prototype.emit = function(ev){
 753   if (events.hasOwnProperty(ev)) {
 754     emit.apply(this, arguments);
 755     return this;
 756   }
 757 
 758   var args = toArray(arguments);
 759   var parserType = parser.EVENT; // default
 760   if (hasBin(args)) { parserType = parser.BINARY_EVENT; } // binary
 761   var packet = { type: parserType, data: args };
 762 
 763   // event ack callback
 764   if ('function' == typeof args[args.length - 1]) {
 765     debug('emitting packet with ack id %d', this.ids);
 766     this.acks[this.ids] = args.pop();
 767     packet.id = this.ids++;
 768   }
 769 
 770   if (this.connected) {
 771     this.packet(packet);
 772   } else {
 773     this.sendBuffer.push(packet);
 774   }
 775 
 776   return this;
 777 };
 778 
 779 /**
 780  * Sends a packet.
 781  *
 782  * @param {Object} packet
 783  * @api private
 784  */
 785 
 786 Socket.prototype.packet = function(packet){
 787   packet.nsp = this.nsp;
 788   this.io.packet(packet);
 789 };
 790 
 791 /**
 792  * Called upon engine `open`.
 793  *
 794  * @api private
 795  */
 796 
 797 Socket.prototype.onopen = function(){
 798   debug('transport is open - connecting');
 799 
 800   // write connect packet if necessary
 801   if ('/' != this.nsp) {
 802     this.packet({ type: parser.CONNECT });
 803   }
 804 };
 805 
 806 /**
 807  * Called upon engine `close`.
 808  *
 809  * @param {String} reason
 810  * @api private
 811  */
 812 
 813 Socket.prototype.onclose = function(reason){
 814   debug('close (%s)', reason);
 815   this.connected = false;
 816   this.disconnected = true;
 817   delete this.id;
 818   this.emit('disconnect', reason);
 819 };
 820 
 821 /**
 822  * Called with socket packet.
 823  *
 824  * @param {Object} packet
 825  * @api private
 826  */
 827 
 828 Socket.prototype.onpacket = function(packet){
 829   if (packet.nsp != this.nsp) return;
 830 
 831   switch (packet.type) {
 832     case parser.CONNECT:
 833       this.onconnect();
 834       break;
 835 
 836     case parser.EVENT:
 837       this.onevent(packet);
 838       break;
 839 
 840     case parser.BINARY_EVENT:
 841       this.onevent(packet);
 842       break;
 843 
 844     case parser.ACK:
 845       this.onack(packet);
 846       break;
 847 
 848     case parser.BINARY_ACK:
 849       this.onack(packet);
 850       break;
 851 
 852     case parser.DISCONNECT:
 853       this.ondisconnect();
 854       break;
 855 
 856     case parser.ERROR:
 857       this.emit('error', packet.data);
 858       break;
 859   }
 860 };
 861 
 862 /**
 863  * Called upon a server event.
 864  *
 865  * @param {Object} packet
 866  * @api private
 867  */
 868 
 869 Socket.prototype.onevent = function(packet){
 870   var args = packet.data || [];
 871   debug('emitting event %j', args);
 872 
 873   if (null != packet.id) {
 874     debug('attaching ack callback to event');
 875     args.push(this.ack(packet.id));
 876   }
 877 
 878   if (this.connected) {
 879     emit.apply(this, args);
 880   } else {
 881     this.receiveBuffer.push(args);
 882   }
 883 };
 884 
 885 /**
 886  * Produces an ack callback to emit with an event.
 887  *
 888  * @api private
 889  */
 890 
 891 Socket.prototype.ack = function(id){
 892   var self = this;
 893   var sent = false;
 894   return function(){
 895     // prevent double callbacks
 896     if (sent) return;
 897     sent = true;
 898     var args = toArray(arguments);
 899     debug('sending ack %j', args);
 900 
 901     var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK;
 902     self.packet({
 903       type: type,
 904       id: id,
 905       data: args
 906     });
 907   };
 908 };
 909 
 910 /**
 911  * Called upon a server acknowlegement.
 912  *
 913  * @param {Object} packet
 914  * @api private
 915  */
 916 
 917 Socket.prototype.onack = function(packet){
 918   debug('calling ack %s with %j', packet.id, packet.data);
 919   var fn = this.acks[packet.id];
 920   fn.apply(this, packet.data);
 921   delete this.acks[packet.id];
 922 };
 923 
 924 /**
 925  * Called upon server connect.
 926  *
 927  * @api private
 928  */
 929 
 930 Socket.prototype.onconnect = function(){
 931   this.connected = true;
 932   this.disconnected = false;
 933   this.emit('connect');
 934   this.emitBuffered();
 935 };
 936 
 937 /**
 938  * Emit buffered events (received and emitted).
 939  *
 940  * @api private
 941  */
 942 
 943 Socket.prototype.emitBuffered = function(){
 944   var i;
 945   for (i = 0; i < this.receiveBuffer.length; i++) {
 946     emit.apply(this, this.receiveBuffer[i]);
 947   }
 948   this.receiveBuffer = [];
 949 
 950   for (i = 0; i < this.sendBuffer.length; i++) {
 951     this.packet(this.sendBuffer[i]);
 952   }
 953   this.sendBuffer = [];
 954 };
 955 
 956 /**
 957  * Called upon server disconnect.
 958  *
 959  * @api private
 960  */
 961 
 962 Socket.prototype.ondisconnect = function(){
 963   debug('server disconnect (%s)', this.nsp);
 964   this.destroy();
 965   this.onclose('io server disconnect');
 966 };
 967 
 968 /**
 969  * Called upon forced client/server side disconnections,
 970  * this method ensures the manager stops tracking us and
 971  * that reconnections don't get triggered for this.
 972  *
 973  * @api private.
 974  */
 975 
 976 Socket.prototype.destroy = function(){
 977   if (this.subs) {
 978     // clean subscriptions to avoid reconnections
 979     for (var i = 0; i < this.subs.length; i++) {
 980       this.subs[i].destroy();
 981     }
 982     this.subs = null;
 983   }
 984 
 985   this.io.destroy(this);
 986 };
 987 
 988 /**
 989  * Disconnects the socket manually.
 990  *
 991  * @return {Socket} self
 992  * @api public
 993  */
 994 
 995 Socket.prototype.close =
 996 Socket.prototype.disconnect = function(){
 997   if (this.connected) {
 998     debug('performing disconnect (%s)', this.nsp);
 999     this.packet({ type: parser.DISCONNECT });
1000   }
1001 
1002   // remove socket from pool
1003   this.destroy();
1004 
1005   if (this.connected) {
1006     // fire events
1007     this.onclose('io client disconnect');
1008   }
1009   return this;
1010 };
1011 
1012 },{"./on":4,"component-bind":8,"component-emitter":9,"debug":10,"has-binary":36,"socket.io-parser":44,"to-array":48}],6:[function(_dereq_,module,exports){
1013 (function (global){
1014 
1015 /**
1016  * Module dependencies.
1017  */
1018 
1019 var parseuri = _dereq_('parseuri');
1020 var debug = _dereq_('debug')('socket.io-client:url');
1021 
1022 /**
1023  * Module exports.
1024  */
1025 
1026 module.exports = url;
1027 
1028 /**
1029  * URL parser.
1030  *
1031  * @param {String} url
1032  * @param {Object} An object meant to mimic window.location.
1033  *                 Defaults to window.location.
1034  * @api public
1035  */
1036 
1037 function url(uri, loc){
1038   var obj = uri;
1039 
1040   // default to window.location
1041   var loc = loc || global.location;
1042   if (null == uri) uri = loc.protocol + '//' + loc.host;
1043 
1044   // relative path support
1045   if ('string' == typeof uri) {
1046     if ('/' == uri.charAt(0)) {
1047       if ('/' == uri.charAt(1)) {
1048         uri = loc.protocol + uri;
1049       } else {
1050         uri = loc.hostname + uri;
1051       }
1052     }
1053 
1054     if (!/^(https?|wss?):///.test(uri)) {
1055       debug('protocol-less url %s', uri);
1056       if ('undefined' != typeof loc) {
1057         uri = loc.protocol + '//' + uri;
1058       } else {
1059         uri = 'https://' + uri;
1060       }
1061     }
1062 
1063     // parse
1064     debug('parse %s', uri);
1065     obj = parseuri(uri);
1066   }
1067 
1068   // make sure we treat `localhost:80` and `localhost` equally
1069   if (!obj.port) {
1070     if (/^(http|ws)$/.test(obj.protocol)) {
1071       obj.port = '80';
1072     }
1073     else if (/^(http|ws)s$/.test(obj.protocol)) {
1074       obj.port = '443';
1075     }
1076   }
1077 
1078   obj.path = obj.path || '/';
1079 
1080   // define unique id
1081   obj.id = obj.protocol + '://' + obj.host + ':' + obj.port;
1082   // define href
1083   obj.href = obj.protocol + '://' + obj.host + (loc && loc.port == obj.port ? '' : (':' + obj.port));
1084 
1085   return obj;
1086 }
1087 
1088 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
1089 },{"debug":10,"parseuri":42}],7:[function(_dereq_,module,exports){
1090 
1091 /**
1092  * Expose `Backoff`.
1093  */
1094 
1095 module.exports = Backoff;
1096 
1097 /**
1098  * Initialize backoff timer with `opts`.
1099  *
1100  * - `min` initial timeout in milliseconds [100]
1101  * - `max` max timeout [10000]
1102  * - `jitter` [0]
1103  * - `factor` [2]
1104  *
1105  * @param {Object} opts
1106  * @api public
1107  */
1108 
1109 function Backoff(opts) {
1110   opts = opts || {};
1111   this.ms = opts.min || 100;
1112   this.max = opts.max || 10000;
1113   this.factor = opts.factor || 2;
1114   this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
1115   this.attempts = 0;
1116 }
1117 
1118 /**
1119  * Return the backoff duration.
1120  *
1121  * @return {Number}
1122  * @api public
1123  */
1124 
1125 Backoff.prototype.duration = function(){
1126   var ms = this.ms * Math.pow(this.factor, this.attempts++);
1127   if (this.jitter) {
1128     var rand =  Math.random();
1129     var deviation = Math.floor(rand * this.jitter * ms);
1130     ms = (Math.floor(rand * 10) & 1) == 0  ? ms - deviation : ms + deviation;
1131   }
1132   return Math.min(ms, this.max) | 0;
1133 };
1134 
1135 /**
1136  * Reset the number of attempts.
1137  *
1138  * @api public
1139  */
1140 
1141 Backoff.prototype.reset = function(){
1142   this.attempts = 0;
1143 };
1144 
1145 /**
1146  * Set the minimum duration
1147  *
1148  * @api public
1149  */
1150 
1151 Backoff.prototype.setMin = function(min){
1152   this.ms = min;
1153 };
1154 
1155 /**
1156  * Set the maximum duration
1157  *
1158  * @api public
1159  */
1160 
1161 Backoff.prototype.setMax = function(max){
1162   this.max = max;
1163 };
1164 
1165 /**
1166  * Set the jitter
1167  *
1168  * @api public
1169  */
1170 
1171 Backoff.prototype.setJitter = function(jitter){
1172   this.jitter = jitter;
1173 };
1174 
1175 
1176 },{}],8:[function(_dereq_,module,exports){
1177 /**
1178  * Slice reference.
1179  */
1180 
1181 var slice = [].slice;
1182 
1183 /**
1184  * Bind `obj` to `fn`.
1185  *
1186  * @param {Object} obj
1187  * @param {Function|String} fn or string
1188  * @return {Function}
1189  * @api public
1190  */
1191 
1192 module.exports = function(obj, fn){
1193   if ('string' == typeof fn) fn = obj[fn];
1194   if ('function' != typeof fn) throw new Error('bind() requires a function');
1195   var args = slice.call(arguments, 2);
1196   return function(){
1197     return fn.apply(obj, args.concat(slice.call(arguments)));
1198   }
1199 };
1200 
1201 },{}],9:[function(_dereq_,module,exports){
1202 
1203 /**
1204  * Expose `Emitter`.
1205  */
1206 
1207 module.exports = Emitter;
1208 
1209 /**
1210  * Initialize a new `Emitter`.
1211  *
1212  * @api public
1213  */
1214 
1215 function Emitter(obj) {
1216   if (obj) return mixin(obj);
1217 };
1218 
1219 /**
1220  * Mixin the emitter properties.
1221  *
1222  * @param {Object} obj
1223  * @return {Object}
1224  * @api private
1225  */
1226 
1227 function mixin(obj) {
1228   for (var key in Emitter.prototype) {
1229     obj[key] = Emitter.prototype[key];
1230   }
1231   return obj;
1232 }
1233 
1234 /**
1235  * Listen on the given `event` with `fn`.
1236  *
1237  * @param {String} event
1238  * @param {Function} fn
1239  * @return {Emitter}
1240  * @api public
1241  */
1242 
1243 Emitter.prototype.on =
1244 Emitter.prototype.addEventListener = function(event, fn){
1245   this._callbacks = this._callbacks || {};
1246   (this._callbacks[event] = this._callbacks[event] || [])
1247     .push(fn);
1248   return this;
1249 };
1250 
1251 /**
1252  * Adds an `event` listener that will be invoked a single
1253  * time then automatically removed.
1254  *
1255  * @param {String} event
1256  * @param {Function} fn
1257  * @return {Emitter}
1258  * @api public
1259  */
1260 
1261 Emitter.prototype.once = function(event, fn){
1262   var self = this;
1263   this._callbacks = this._callbacks || {};
1264 
1265   function on() {
1266     self.off(event, on);
1267     fn.apply(this, arguments);
1268   }
1269 
1270   on.fn = fn;
1271   this.on(event, on);
1272   return this;
1273 };
1274 
1275 /**
1276  * Remove the given callback for `event` or all
1277  * registered callbacks.
1278  *
1279  * @param {String} event
1280  * @param {Function} fn
1281  * @return {Emitter}
1282  * @api public
1283  */
1284 
1285 Emitter.prototype.off =
1286 Emitter.prototype.removeListener =
1287 Emitter.prototype.removeAllListeners =
1288 Emitter.prototype.removeEventListener = function(event, fn){
1289   this._callbacks = this._callbacks || {};
1290 
1291   // all
1292   if (0 == arguments.length) {
1293     this._callbacks = {};
1294     return this;
1295   }
1296 
1297   // specific event
1298   var callbacks = this._callbacks[event];
1299   if (!callbacks) return this;
1300 
1301   // remove all handlers
1302   if (1 == arguments.length) {
1303     delete this._callbacks[event];
1304     return this;
1305   }
1306 
1307   // remove specific handler
1308   var cb;
1309   for (var i = 0; i < callbacks.length; i++) {
1310     cb = callbacks[i];
1311     if (cb === fn || cb.fn === fn) {
1312       callbacks.splice(i, 1);
1313       break;
1314     }
1315   }
1316   return this;
1317 };
1318 
1319 /**
1320  * Emit `event` with the given args.
1321  *
1322  * @param {String} event
1323  * @param {Mixed} ...
1324  * @return {Emitter}
1325  */
1326 
1327 Emitter.prototype.emit = function(event){
1328   this._callbacks = this._callbacks || {};
1329   var args = [].slice.call(arguments, 1)
1330     , callbacks = this._callbacks[event];
1331 
1332   if (callbacks) {
1333     callbacks = callbacks.slice(0);
1334     for (var i = 0, len = callbacks.length; i < len; ++i) {
1335       callbacks[i].apply(this, args);
1336     }
1337   }
1338 
1339   return this;
1340 };
1341 
1342 /**
1343  * Return array of callbacks for `event`.
1344  *
1345  * @param {String} event
1346  * @return {Array}
1347  * @api public
1348  */
1349 
1350 Emitter.prototype.listeners = function(event){
1351   this._callbacks = this._callbacks || {};
1352   return this._callbacks[event] || [];
1353 };
1354 
1355 /**
1356  * Check if this emitter has `event` handlers.
1357  *
1358  * @param {String} event
1359  * @return {Boolean}
1360  * @api public
1361  */
1362 
1363 Emitter.prototype.hasListeners = function(event){
1364   return !! this.listeners(event).length;
1365 };
1366 
1367 },{}],10:[function(_dereq_,module,exports){
1368 
1369 /**
1370  * Expose `debug()` as the module.
1371  */
1372 
1373 module.exports = debug;
1374 
1375 /**
1376  * Create a debugger with the given `name`.
1377  *
1378  * @param {String} name
1379  * @return {Type}
1380  * @api public
1381  */
1382 
1383 function debug(name) {
1384   if (!debug.enabled(name)) return function(){};
1385 
1386   return function(fmt){
1387     fmt = coerce(fmt);
1388 
1389     var curr = new Date;
1390     var ms = curr - (debug[name] || curr);
1391     debug[name] = curr;
1392 
1393     fmt = name
1394       + ' '
1395       + fmt
1396       + ' +' + debug.humanize(ms);
1397 
1398     // This hackery is required for IE8
1399     // where `console.log` doesn't have 'apply'
1400     window.console
1401       && console.log
1402       && Function.prototype.apply.call(console.log, console, arguments);
1403   }
1404 }
1405 
1406 /**
1407  * The currently active debug mode names.
1408  */
1409 
1410 debug.names = [];
1411 debug.skips = [];
1412 
1413 /**
1414  * Enables a debug mode by name. This can include modes
1415  * separated by a colon and wildcards.
1416  *
1417  * @param {String} name
1418  * @api public
1419  */
1420 
1421 debug.enable = function(name) {
1422   try {
1423     localStorage.debug = name;
1424   } catch(e){}
1425 
1426   var split = (name || '').split(/[s,]+/)
1427     , len = split.length;
1428 
1429   for (var i = 0; i < len; i++) {
1430     name = split[i].replace('*', '.*?');
1431     if (name[0] === '-') {
1432       debug.skips.push(new RegExp('^' + name.substr(1) + '$'));
1433     }
1434     else {
1435       debug.names.push(new RegExp('^' + name + '$'));
1436     }
1437   }
1438 };
1439 
1440 /**
1441  * Disable debug output.
1442  *
1443  * @api public
1444  */
1445 
1446 debug.disable = function(){
1447   debug.enable('');
1448 };
1449 
1450 /**
1451  * Humanize the given `ms`.
1452  *
1453  * @param {Number} m
1454  * @return {String}
1455  * @api private
1456  */
1457 
1458 debug.humanize = function(ms) {
1459   var sec = 1000
1460     , min = 60 * 1000
1461     , hour = 60 * min;
1462 
1463   if (ms >= hour) return (ms / hour).toFixed(1) + 'h';
1464   if (ms >= min) return (ms / min).toFixed(1) + 'm';
1465   if (ms >= sec) return (ms / sec | 0) + 's';
1466   return ms + 'ms';
1467 };
1468 
1469 /**
1470  * Returns true if the given mode name is enabled, false otherwise.
1471  *
1472  * @param {String} name
1473  * @return {Boolean}
1474  * @api public
1475  */
1476 
1477 debug.enabled = function(name) {
1478   for (var i = 0, len = debug.skips.length; i < len; i++) {
1479     if (debug.skips[i].test(name)) {
1480       return false;
1481     }
1482   }
1483   for (var i = 0, len = debug.names.length; i < len; i++) {
1484     if (debug.names[i].test(name)) {
1485       return true;
1486     }
1487   }
1488   return false;
1489 };
1490 
1491 /**
1492  * Coerce `val`.
1493  */
1494 
1495 function coerce(val) {
1496   if (val instanceof Error) return val.stack || val.message;
1497   return val;
1498 }
1499 
1500 // persist
1501 
1502 try {
1503   if (window.localStorage) debug.enable(localStorage.debug);
1504 } catch(e){}
1505 
1506 },{}],11:[function(_dereq_,module,exports){
1507 
1508 module.exports =  _dereq_('./lib/');
1509 
1510 },{"./lib/":12}],12:[function(_dereq_,module,exports){
1511 
1512 module.exports = _dereq_('./socket');
1513 
1514 /**
1515  * Exports parser
1516  *
1517  * @api public
1518  *
1519  */
1520 module.exports.parser = _dereq_('engine.io-parser');
1521 
1522 },{"./socket":13,"engine.io-parser":25}],13:[function(_dereq_,module,exports){
1523 (function (global){
1524 /**
1525  * Module dependencies.
1526  */
1527 
1528 var transports = _dereq_('./transports');
1529 var Emitter = _dereq_('component-emitter');
1530 var debug = _dereq_('debug')('engine.io-client:socket');
1531 var index = _dereq_('indexof');
1532 var parser = _dereq_('engine.io-parser');
1533 var parseuri = _dereq_('parseuri');
1534 var parsejson = _dereq_('parsejson');
1535 var parseqs = _dereq_('parseqs');
1536 
1537 /**
1538  * Module exports.
1539  */
1540 
1541 module.exports = Socket;
1542 
1543 /**
1544  * Noop function.
1545  *
1546  * @api private
1547  */
1548 
1549 function noop(){}
1550 
1551 /**
1552  * Socket constructor.
1553  *
1554  * @param {String|Object} uri or options
1555  * @param {Object} options
1556  * @api public
1557  */
1558 
1559 function Socket(uri, opts){
1560   if (!(this instanceof Socket)) return new Socket(uri, opts);
1561 
1562   opts = opts || {};
1563 
1564   if (uri && 'object' == typeof uri) {
1565     opts = uri;
1566     uri = null;
1567   }
1568 
1569   if (uri) {
1570     uri = parseuri(uri);
1571     opts.host = uri.host;
1572     opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
1573     opts.port = uri.port;
1574     if (uri.query) opts.query = uri.query;
1575   }
1576 
1577   this.secure = null != opts.secure ? opts.secure :
1578     (global.location && 'https:' == location.protocol);
1579 
1580   if (opts.host) {
1581     var pieces = opts.host.split(':');
1582     opts.hostname = pieces.shift();
1583     if (pieces.length) {
1584       opts.port = pieces.pop();
1585     } else if (!opts.port) {
1586       // if no port is specified manually, use the protocol default
1587       opts.port = this.secure ? '443' : '80';
1588     }
1589   }
1590 
1591   this.agent = opts.agent || false;
1592   this.hostname = opts.hostname ||
1593     (global.location ? location.hostname : 'localhost');
1594   this.port = opts.port || (global.location && location.port ?
1595        location.port :
1596        (this.secure ? 443 : 80));
1597   this.query = opts.query || {};
1598   if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
1599   this.upgrade = false !== opts.upgrade;
1600   this.path = (opts.path || '/engine.io').replace(//$/, '') + '/';
1601   this.forceJSONP = !!opts.forceJSONP;
1602   this.jsonp = false !== opts.jsonp;
1603   this.forceBase64 = !!opts.forceBase64;
1604   this.enablesXDR = !!opts.enablesXDR;
1605   this.timestampParam = opts.timestampParam || 't';
1606   this.timestampRequests = opts.timestampRequests;
1607   this.transports = opts.transports || ['polling', 'websocket'];
1608   this.readyState = '';
1609   this.writeBuffer = [];
1610   this.callbackBuffer = [];
1611   this.policyPort = opts.policyPort || 843;
1612   this.rememberUpgrade = opts.rememberUpgrade || false;
1613   this.binaryType = null;
1614   this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
1615 
1616   // SSL options for Node.js client
1617   this.pfx = opts.pfx || null;
1618   this.key = opts.key || null;
1619   this.passphrase = opts.passphrase || null;
1620   this.cert = opts.cert || null;
1621   this.ca = opts.ca || null;
1622   this.ciphers = opts.ciphers || null;
1623   this.rejectUnauthorized = opts.rejectUnauthorized || null;
1624 
1625   this.open();
1626 }
1627 
1628 Socket.priorWebsocketSuccess = false;
1629 
1630 /**
1631  * Mix in `Emitter`.
1632  */
1633 
1634 Emitter(Socket.prototype);
1635 
1636 /**
1637  * Protocol version.
1638  *
1639  * @api public
1640  */
1641 
1642 Socket.protocol = parser.protocol; // this is an int
1643 
1644 /**
1645  * Expose deps for legacy compatibility
1646  * and standalone browser access.
1647  */
1648 
1649 Socket.Socket = Socket;
1650 Socket.Transport = _dereq_('./transport');
1651 Socket.transports = _dereq_('./transports');
1652 Socket.parser = _dereq_('engine.io-parser');
1653 
1654 /**
1655  * Creates transport of the given type.
1656  *
1657  * @param {String} transport name
1658  * @return {Transport}
1659  * @api private
1660  */
1661 
1662 Socket.prototype.createTransport = function (name) {
1663   debug('creating transport "%s"', name);
1664   var query = clone(this.query);
1665 
1666   // append engine.io protocol identifier
1667   query.EIO = parser.protocol;
1668 
1669   // transport name
1670   query.transport = name;
1671 
1672   // session id if we already have one
1673   if (this.id) query.sid = this.id;
1674 
1675   var transport = new transports[name]({
1676     agent: this.agent,
1677     hostname: this.hostname,
1678     port: this.port,
1679     secure: this.secure,
1680     path: this.path,
1681     query: query,
1682     forceJSONP: this.forceJSONP,
1683     jsonp: this.jsonp,
1684     forceBase64: this.forceBase64,
1685     enablesXDR: this.enablesXDR,
1686     timestampRequests: this.timestampRequests,
1687     timestampParam: this.timestampParam,
1688     policyPort: this.policyPort,
1689     socket: this,
1690     pfx: this.pfx,
1691     key: this.key,
1692     passphrase: this.passphrase,
1693     cert: this.cert,
1694     ca: this.ca,
1695     ciphers: this.ciphers,
1696     rejectUnauthorized: this.rejectUnauthorized
1697   });
1698 
1699   return transport;
1700 };
1701 
1702 function clone (obj) {
1703   var o = {};
1704   for (var i in obj) {
1705     if (obj.hasOwnProperty(i)) {
1706       o[i] = obj[i];
1707     }
1708   }
1709   return o;
1710 }
1711 
1712 /**
1713  * Initializes transport to use and starts probe.
1714  *
1715  * @api private
1716  */
1717 Socket.prototype.open = function () {
1718   var transport;
1719   if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
1720     transport = 'websocket';
1721   } else if (0 == this.transports.length) {
1722     // Emit error on next tick so it can be listened to
1723     var self = this;
1724     setTimeout(function() {
1725       self.emit('error', 'No transports available');
1726     }, 0);
1727     return;
1728   } else {
1729     transport = this.transports[0];
1730   }
1731   this.readyState = 'opening';
1732 
1733   // Retry with the next transport if the transport is disabled (jsonp: false)
1734   var transport;
1735   try {
1736     transport = this.createTransport(transport);
1737   } catch (e) {
1738     this.transports.shift();
1739     this.open();
1740     return;
1741   }
1742 
1743   transport.open();
1744   this.setTransport(transport);
1745 };
1746 
1747 /**
1748  * Sets the current transport. Disables the existing one (if any).
1749  *
1750  * @api private
1751  */
1752 
1753 Socket.prototype.setTransport = function(transport){
1754   debug('setting transport %s', transport.name);
1755   var self = this;
1756 
1757   if (this.transport) {
1758     debug('clearing existing transport %s', this.transport.name);
1759     this.transport.removeAllListeners();
1760   }
1761 
1762   // set up transport
1763   this.transport = transport;
1764 
1765   // set up transport listeners
1766   transport
1767   .on('drain', function(){
1768     self.onDrain();
1769   })
1770   .on('packet', function(packet){
1771     self.onPacket(packet);
1772   })
1773   .on('error', function(e){
1774     self.onError(e);
1775   })
1776   .on('close', function(){
1777     self.onClose('transport close');
1778   });
1779 };
1780 
1781 /**
1782  * Probes a transport.
1783  *
1784  * @param {String} transport name
1785  * @api private
1786  */
1787 
1788 Socket.prototype.probe = function (name) {
1789   debug('probing transport "%s"', name);
1790   var transport = this.createTransport(name, { probe: 1 })
1791     , failed = false
1792     , self = this;
1793 
1794   Socket.priorWebsocketSuccess = false;
1795 
1796   function onTransportOpen(){
1797     if (self.onlyBinaryUpgrades) {
1798       var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
1799       failed = failed || upgradeLosesBinary;
1800     }
1801     if (failed) return;
1802 
1803     debug('probe transport "%s" opened', name);
1804     transport.send([{ type: 'ping', data: 'probe' }]);
1805     transport.once('packet', function (msg) {
1806       if (failed) return;
1807       if ('pong' == msg.type && 'probe' == msg.data) {
1808         debug('probe transport "%s" pong', name);
1809         self.upgrading = true;
1810         self.emit('upgrading', transport);
1811         if (!transport) return;
1812         Socket.priorWebsocketSuccess = 'websocket' == transport.name;
1813 
1814         debug('pausing current transport "%s"', self.transport.name);
1815         self.transport.pause(function () {
1816           if (failed) return;
1817           if ('closed' == self.readyState) return;
1818           debug('changing transport and sending upgrade packet');
1819 
1820           cleanup();
1821 
1822           self.setTransport(transport);
1823           transport.send([{ type: 'upgrade' }]);
1824           self.emit('upgrade', transport);
1825           transport = null;
1826           self.upgrading = false;
1827           self.flush();
1828         });
1829       } else {
1830         debug('probe transport "%s" failed', name);
1831         var err = new Error('probe error');
1832         err.transport = transport.name;
1833         self.emit('upgradeError', err);
1834       }
1835     });
1836   }
1837 
1838   function freezeTransport() {
1839     if (failed) return;
1840 
1841     // Any callback called by transport should be ignored since now
1842     failed = true;
1843 
1844     cleanup();
1845 
1846     transport.close();
1847     transport = null;
1848   }
1849 
1850   //Handle any error that happens while probing
1851   function onerror(err) {
1852     var error = new Error('probe error: ' + err);
1853     error.transport = transport.name;
1854 
1855     freezeTransport();
1856 
1857     debug('probe transport "%s" failed because of error: %s', name, err);
1858 
1859     self.emit('upgradeError', error);
1860   }
1861 
1862   function onTransportClose(){
1863     onerror("transport closed");
1864   }
1865 
1866   //When the socket is closed while we're probing
1867   function onclose(){
1868     onerror("socket closed");
1869   }
1870 
1871   //When the socket is upgraded while we're probing
1872   function onupgrade(to){
1873     if (transport && to.name != transport.name) {
1874       debug('"%s" works - aborting "%s"', to.name, transport.name);
1875       freezeTransport();
1876     }
1877   }
1878 
1879   //Remove all listeners on the transport and on self
1880   function cleanup(){
1881     transport.removeListener('open', onTransportOpen);
1882     transport.removeListener('error', onerror);
1883     transport.removeListener('close', onTransportClose);
1884     self.removeListener('close', onclose);
1885     self.removeListener('upgrading', onupgrade);
1886   }
1887 
1888   transport.once('open', onTransportOpen);
1889   transport.once('error', onerror);
1890   transport.once('close', onTransportClose);
1891 
1892   this.once('close', onclose);
1893   this.once('upgrading', onupgrade);
1894 
1895   transport.open();
1896 
1897 };
1898 
1899 /**
1900  * Called when connection is deemed open.
1901  *
1902  * @api public
1903  */
1904 
1905 Socket.prototype.onOpen = function () {
1906   debug('socket open');
1907   this.readyState = 'open';
1908   Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
1909   this.emit('open');
1910   this.flush();
1911 
1912   // we check for `readyState` in case an `open`
1913   // listener already closed the socket
1914   if ('open' == this.readyState && this.upgrade && this.transport.pause) {
1915     debug('starting upgrade probes');
1916     for (var i = 0, l = this.upgrades.length; i < l; i++) {
1917       this.probe(this.upgrades[i]);
1918     }
1919   }
1920 };
1921 
1922 /**
1923  * Handles a packet.
1924  *
1925  * @api private
1926  */
1927 
1928 Socket.prototype.onPacket = function (packet) {
1929   if ('opening' == this.readyState || 'open' == this.readyState) {
1930     debug('socket receive: type "%s", data "%s"', packet.type, packet.data);
1931 
1932     this.emit('packet', packet);
1933 
1934     // Socket is live - any packet counts
1935     this.emit('heartbeat');
1936 
1937     switch (packet.type) {
1938       case 'open':
1939         this.onHandshake(parsejson(packet.data));
1940         break;
1941 
1942       case 'pong':
1943         this.setPing();
1944         break;
1945 
1946       case 'error':
1947         var err = new Error('server error');
1948         err.code = packet.data;
1949         this.emit('error', err);
1950         break;
1951 
1952       case 'message':
1953         this.emit('data', packet.data);
1954         this.emit('message', packet.data);
1955         break;
1956     }
1957   } else {
1958     debug('packet received with socket readyState "%s"', this.readyState);
1959   }
1960 };
1961 
1962 /**
1963  * Called upon handshake completion.
1964  *
1965  * @param {Object} handshake obj
1966  * @api private
1967  */
1968 
1969 Socket.prototype.onHandshake = function (data) {
1970   this.emit('handshake', data);
1971   this.id = data.sid;
1972   this.transport.query.sid = data.sid;
1973   this.upgrades = this.filterUpgrades(data.upgrades);
1974   this.pingInterval = data.pingInterval;
1975   this.pingTimeout = data.pingTimeout;
1976   this.onOpen();
1977   // In case open handler closes socket
1978   if  ('closed' == this.readyState) return;
1979   this.setPing();
1980 
1981   // Prolong liveness of socket on heartbeat
1982   this.removeListener('heartbeat', this.onHeartbeat);
1983   this.on('heartbeat', this.onHeartbeat);
1984 };
1985 
1986 /**
1987  * Resets ping timeout.
1988  *
1989  * @api private
1990  */
1991 
1992 Socket.prototype.onHeartbeat = function (timeout) {
1993   clearTimeout(this.pingTimeoutTimer);
1994   var self = this;
1995   self.pingTimeoutTimer = setTimeout(function () {
1996     if ('closed' == self.readyState) return;
1997     self.onClose('ping timeout');
1998   }, timeout || (self.pingInterval + self.pingTimeout));
1999 };
2000 
2001 /**
2002  * Pings server every `this.pingInterval` and expects response
2003  * within `this.pingTimeout` or closes connection.
2004  *
2005  * @api private
2006  */
2007 
2008 Socket.prototype.setPing = function () {
2009   var self = this;
2010   clearTimeout(self.pingIntervalTimer);
2011   self.pingIntervalTimer = setTimeout(function () {
2012     debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
2013     self.ping();
2014     self.onHeartbeat(self.pingTimeout);
2015   }, self.pingInterval);
2016 };
2017 
2018 /**
2019 * Sends a ping packet.
2020 *
2021 * @api public
2022 */
2023 
2024 Socket.prototype.ping = function () {
2025   this.sendPacket('ping');
2026 };
2027 
2028 /**
2029  * Called on `drain` event
2030  *
2031  * @api private
2032  */
2033 
2034 Socket.prototype.onDrain = function() {
2035   for (var i = 0; i < this.prevBufferLen; i++) {
2036     if (this.callbackBuffer[i]) {
2037       this.callbackBuffer[i]();
2038     }
2039   }
2040 
2041   this.writeBuffer.splice(0, this.prevBufferLen);
2042   this.callbackBuffer.splice(0, this.prevBufferLen);
2043 
2044   // setting prevBufferLen = 0 is very important
2045   // for example, when upgrading, upgrade packet is sent over,
2046   // and a nonzero prevBufferLen could cause problems on `drain`
2047   this.prevBufferLen = 0;
2048 
2049   if (this.writeBuffer.length == 0) {
2050     this.emit('drain');
2051   } else {
2052     this.flush();
2053   }
2054 };
2055 
2056 /**
2057  * Flush write buffers.
2058  *
2059  * @api private
2060  */
2061 
2062 Socket.prototype.flush = function () {
2063   if ('closed' != this.readyState && this.transport.writable &&
2064     !this.upgrading && this.writeBuffer.length) {
2065     debug('flushing %d packets in socket', this.writeBuffer.length);
2066     this.transport.send(this.writeBuffer);
2067     // keep track of current length of writeBuffer
2068     // splice writeBuffer and callbackBuffer on `drain`
2069     this.prevBufferLen = this.writeBuffer.length;
2070     this.emit('flush');
2071   }
2072 };
2073 
2074 /**
2075  * Sends a message.
2076  *
2077  * @param {String} message.
2078  * @param {Function} callback function.
2079  * @return {Socket} for chaining.
2080  * @api public
2081  */
2082 
2083 Socket.prototype.write =
2084 Socket.prototype.send = function (msg, fn) {
2085   this.sendPacket('message', msg, fn);
2086   return this;
2087 };
2088 
2089 /**
2090  * Sends a packet.
2091  *
2092  * @param {String} packet type.
2093  * @param {String} data.
2094  * @param {Function} callback function.
2095  * @api private
2096  */
2097 
2098 Socket.prototype.sendPacket = function (type, data, fn) {
2099   if ('closing' == this.readyState || 'closed' == this.readyState) {
2100     return;
2101   }
2102 
2103   var packet = { type: type, data: data };
2104   this.emit('packetCreate', packet);
2105   this.writeBuffer.push(packet);
2106   this.callbackBuffer.push(fn);
2107   this.flush();
2108 };
2109 
2110 /**
2111  * Closes the connection.
2112  *
2113  * @api private
2114  */
2115 
2116 Socket.prototype.close = function () {
2117   if ('opening' == this.readyState || 'open' == this.readyState) {
2118     this.readyState = 'closing';
2119 
2120     var self = this;
2121 
2122     function close() {
2123       self.onClose('forced close');
2124       debug('socket closing - telling transport to close');
2125       self.transport.close();
2126     }
2127 
2128     function cleanupAndClose() {
2129       self.removeListener('upgrade', cleanupAndClose);
2130       self.removeListener('upgradeError', cleanupAndClose);
2131       close();
2132     }
2133 
2134     function waitForUpgrade() {
2135       // wait for upgrade to finish since we can't send packets while pausing a transport
2136       self.once('upgrade', cleanupAndClose);
2137       self.once('upgradeError', cleanupAndClose);
2138     }
2139 
2140     if (this.writeBuffer.length) {
2141       this.once('drain', function() {
2142         if (this.upgrading) {
2143           waitForUpgrade();
2144         } else {
2145           close();
2146         }
2147       });
2148     } else if (this.upgrading) {
2149       waitForUpgrade();
2150     } else {
2151       close();
2152     }
2153   }
2154 
2155   return this;
2156 };
2157 
2158 /**
2159  * Called upon transport error
2160  *
2161  * @api private
2162  */
2163 
2164 Socket.prototype.onError = function (err) {
2165   debug('socket error %j', err);
2166   Socket.priorWebsocketSuccess = false;
2167   this.emit('error', err);
2168   this.onClose('transport error', err);
2169 };
2170 
2171 /**
2172  * Called upon transport close.
2173  *
2174  * @api private
2175  */
2176 
2177 Socket.prototype.onClose = function (reason, desc) {
2178   if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
2179     debug('socket close with reason: "%s"', reason);
2180     var self = this;
2181 
2182     // clear timers
2183     clearTimeout(this.pingIntervalTimer);
2184     clearTimeout(this.pingTimeoutTimer);
2185 
2186     // clean buffers in next tick, so developers can still
2187     // grab the buffers on `close` event
2188     setTimeout(function() {
2189       self.writeBuffer = [];
2190       self.callbackBuffer = [];
2191       self.prevBufferLen = 0;
2192     }, 0);
2193 
2194     // stop event from firing again for transport
2195     this.transport.removeAllListeners('close');
2196 
2197     // ensure transport won't stay open
2198     this.transport.close();
2199 
2200     // ignore further transport communication
2201     this.transport.removeAllListeners();
2202 
2203     // set ready state
2204     this.readyState = 'closed';
2205 
2206     // clear session id
2207     this.id = null;
2208 
2209     // emit close event
2210     this.emit('close', reason, desc);
2211   }
2212 };
2213 
2214 /**
2215  * Filters upgrades, returning only those matching client transports.
2216  *
2217  * @param {Array} server upgrades
2218  * @api private
2219  *
2220  */
2221 
2222 Socket.prototype.filterUpgrades = function (upgrades) {
2223   var filteredUpgrades = [];
2224   for (var i = 0, j = upgrades.length; i<j; i++) {
2225     if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
2226   }
2227   return filteredUpgrades;
2228 };
2229 
2230 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
2231 },{"./transport":14,"./transports":15,"component-emitter":9,"debug":22,"engine.io-parser":25,"indexof":40,"parsejson":32,"parseqs":33,"parseuri":34}],14:[function(_dereq_,module,exports){
2232 /**
2233  * Module dependencies.
2234  */
2235 
2236 var parser = _dereq_('engine.io-parser');
2237 var Emitter = _dereq_('component-emitter');
2238 
2239 /**
2240  * Module exports.
2241  */
2242 
2243 module.exports = Transport;
2244 
2245 /**
2246  * Transport abstract constructor.
2247  *
2248  * @param {Object} options.
2249  * @api private
2250  */
2251 
2252 function Transport (opts) {
2253   this.path = opts.path;
2254   this.hostname = opts.hostname;
2255   this.port = opts.port;
2256   this.secure = opts.secure;
2257   this.query = opts.query;
2258   this.timestampParam = opts.timestampParam;
2259   this.timestampRequests = opts.timestampRequests;
2260   this.readyState = '';
2261   this.agent = opts.agent || false;
2262   this.socket = opts.socket;
2263   this.enablesXDR = opts.enablesXDR;
2264 
2265   // SSL options for Node.js client
2266   this.pfx = opts.pfx;
2267   this.key = opts.key;
2268   this.passphrase = opts.passphrase;
2269   this.cert = opts.cert;
2270   this.ca = opts.ca;
2271   this.ciphers = opts.ciphers;
2272   this.rejectUnauthorized = opts.rejectUnauthorized;
2273 }
2274 
2275 /**
2276  * Mix in `Emitter`.
2277  */
2278 
2279 Emitter(Transport.prototype);
2280 
2281 /**
2282  * A counter used to prevent collisions in the timestamps used
2283  * for cache busting.
2284  */
2285 
2286 Transport.timestamps = 0;
2287 
2288 /**
2289  * Emits an error.
2290  *
2291  * @param {String} str
2292  * @return {Transport} for chaining
2293  * @api public
2294  */
2295 
2296 Transport.prototype.onError = function (msg, desc) {
2297   var err = new Error(msg);
2298   err.type = 'TransportError';
2299   err.description = desc;
2300   this.emit('error', err);
2301   return this;
2302 };
2303 
2304 /**
2305  * Opens the transport.
2306  *
2307  * @api public
2308  */
2309 
2310 Transport.prototype.open = function () {
2311   if ('closed' == this.readyState || '' == this.readyState) {
2312     this.readyState = 'opening';
2313     this.doOpen();
2314   }
2315 
2316   return this;
2317 };
2318 
2319 /**
2320  * Closes the transport.
2321  *
2322  * @api private
2323  */
2324 
2325 Transport.prototype.close = function () {
2326   if ('opening' == this.readyState || 'open' == this.readyState) {
2327     this.doClose();
2328     this.onClose();
2329   }
2330 
2331   return this;
2332 };
2333 
2334 /**
2335  * Sends multiple packets.
2336  *
2337  * @param {Array} packets
2338  * @api private
2339  */
2340 
2341 Transport.prototype.send = function(packets){
2342   if ('open' == this.readyState) {
2343     this.write(packets);
2344   } else {
2345     throw new Error('Transport not open');
2346   }
2347 };
2348 
2349 /**
2350  * Called upon open
2351  *
2352  * @api private
2353  */
2354 
2355 Transport.prototype.onOpen = function () {
2356   this.readyState = 'open';
2357   this.writable = true;
2358   this.emit('open');
2359 };
2360 
2361 /**
2362  * Called with data.
2363  *
2364  * @param {String} data
2365  * @api private
2366  */
2367 
2368 Transport.prototype.onData = function(data){
2369   var packet = parser.decodePacket(data, this.socket.binaryType);
2370   this.onPacket(packet);
2371 };
2372 
2373 /**
2374  * Called with a decoded packet.
2375  */
2376 
2377 Transport.prototype.onPacket = function (packet) {
2378   this.emit('packet', packet);
2379 };
2380 
2381 /**
2382  * Called upon close.
2383  *
2384  * @api private
2385  */
2386 
2387 Transport.prototype.onClose = function () {
2388   this.readyState = 'closed';
2389   this.emit('close');
2390 };
2391 
2392 },{"component-emitter":9,"engine.io-parser":25}],15:[function(_dereq_,module,exports){
2393 (function (global){
2394 /**
2395  * Module dependencies
2396  */
2397 
2398 var XMLHttpRequest = _dereq_('xmlhttprequest');
2399 var XHR = _dereq_('./polling-xhr');
2400 var JSONP = _dereq_('./polling-jsonp');
2401 var websocket = _dereq_('./websocket');
2402 
2403 /**
2404  * Export transports.
2405  */
2406 
2407 exports.polling = polling;
2408 exports.websocket = websocket;
2409 
2410 /**
2411  * Polling transport polymorphic constructor.
2412  * Decides on xhr vs jsonp based on feature detection.
2413  *
2414  * @api private
2415  */
2416 
2417 function polling(opts){
2418   var xhr;
2419   var xd = false;
2420   var xs = false;
2421   var jsonp = false !== opts.jsonp;
2422 
2423   if (global.location) {
2424     var isSSL = 'https:' == location.protocol;
2425     var port = location.port;
2426 
2427     // some user agents have empty `location.port`
2428     if (!port) {
2429       port = isSSL ? 443 : 80;
2430     }
2431 
2432     xd = opts.hostname != location.hostname || port != opts.port;
2433     xs = opts.secure != isSSL;
2434   }
2435 
2436   opts.xdomain = xd;
2437   opts.xscheme = xs;
2438   xhr = new XMLHttpRequest(opts);
2439 
2440   if ('open' in xhr && !opts.forceJSONP) {
2441     return new XHR(opts);
2442   } else {
2443     if (!jsonp) throw new Error('JSONP disabled');
2444     return new JSONP(opts);
2445   }
2446 }
2447 
2448 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
2449 },{"./polling-jsonp":16,"./polling-xhr":17,"./websocket":19,"xmlhttprequest":20}],16:[function(_dereq_,module,exports){
2450 (function (global){
2451 
2452 /**
2453  * Module requirements.
2454  */
2455 
2456 var Polling = _dereq_('./polling');
2457 var inherit = _dereq_('component-inherit');
2458 
2459 /**
2460  * Module exports.
2461  */
2462 
2463 module.exports = JSONPPolling;
2464 
2465 /**
2466  * Cached regular expressions.
2467  */
2468 
2469 var rNewline = /
/g;
2470 var rEscapedNewline = /\n/g;
2471 
2472 /**
2473  * Global JSONP callbacks.
2474  */
2475 
2476 var callbacks;
2477 
2478 /**
2479  * Callbacks count.
2480  */
2481 
2482 var index = 0;
2483 
2484 /**
2485  * Noop.
2486  */
2487 
2488 function empty () { }
2489 
2490 /**
2491  * JSONP Polling constructor.
2492  *
2493  * @param {Object} opts.
2494  * @api public
2495  */
2496 
2497 function JSONPPolling (opts) {
2498   Polling.call(this, opts);
2499 
2500   this.query = this.query || {};
2501 
2502   // define global callbacks array if not present
2503   // we do this here (lazily) to avoid unneeded global pollution
2504   if (!callbacks) {
2505     // we need to consider multiple engines in the same page
2506     if (!global.___eio) global.___eio = [];
2507     callbacks = global.___eio;
2508   }
2509 
2510   // callback identifier
2511   this.index = callbacks.length;
2512 
2513   // add callback to jsonp global
2514   var self = this;
2515   callbacks.push(function (msg) {
2516     self.onData(msg);
2517   });
2518 
2519   // append to query string
2520   this.query.j = this.index;
2521 
2522   // prevent spurious errors from being emitted when the window is unloaded
2523   if (global.document && global.addEventListener) {
2524     global.addEventListener('beforeunload', function () {
2525       if (self.script) self.script.onerror = empty;
2526     }, false);
2527   }
2528 }
2529 
2530 /**
2531  * Inherits from Polling.
2532  */
2533 
2534 inherit(JSONPPolling, Polling);
2535 
2536 /*
2537  * JSONP only supports binary as base64 encoded strings
2538  */
2539 
2540 JSONPPolling.prototype.supportsBinary = false;
2541 
2542 /**
2543  * Closes the socket.
2544  *
2545  * @api private
2546  */
2547 
2548 JSONPPolling.prototype.doClose = function () {
2549   if (this.script) {
2550     this.script.parentNode.removeChild(this.script);
2551     this.script = null;
2552   }
2553 
2554   if (this.form) {
2555     this.form.parentNode.removeChild(this.form);
2556     this.form = null;
2557     this.iframe = null;
2558   }
2559 
2560   Polling.prototype.doClose.call(this);
2561 };
2562 
2563 /**
2564  * Starts a poll cycle.
2565  *
2566  * @api private
2567  */
2568 
2569 JSONPPolling.prototype.doPoll = function () {
2570   var self = this;
2571   var script = document.createElement('script');
2572 
2573   if (this.script) {
2574     this.script.parentNode.removeChild(this.script);
2575     this.script = null;
2576   }
2577 
2578   script.async = true;
2579   script.src = this.uri();
2580   script.onerror = function(e){
2581     self.onError('jsonp poll error',e);
2582   };
2583 
2584   var insertAt = document.getElementsByTagName('script')[0];
2585   insertAt.parentNode.insertBefore(script, insertAt);
2586   this.script = script;
2587 
2588   var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
2589   
2590   if (isUAgecko) {
2591     setTimeout(function () {
2592       var iframe = document.createElement('iframe');
2593       document.body.appendChild(iframe);
2594       document.body.removeChild(iframe);
2595     }, 100);
2596   }
2597 };
2598 
2599 /**
2600  * Writes with a hidden iframe.
2601  *
2602  * @param {String} data to send
2603  * @param {Function} called upon flush.
2604  * @api private
2605  */
2606 
2607 JSONPPolling.prototype.doWrite = function (data, fn) {
2608   var self = this;
2609 
2610   if (!this.form) {
2611     var form = document.createElement('form');
2612     var area = document.createElement('textarea');
2613     var id = this.iframeId = 'eio_iframe_' + this.index;
2614     var iframe;
2615 
2616     form.className = 'socketio';
2617     form.style.position = 'absolute';
2618     form.style.top = '-1000px';
2619     form.style.left = '-1000px';
2620     form.target = id;
2621     form.method = 'POST';
2622     form.setAttribute('accept-charset', 'utf-8');
2623     area.name = 'd';
2624     form.appendChild(area);
2625     document.body.appendChild(form);
2626 
2627     this.form = form;
2628     this.area = area;
2629   }
2630 
2631   this.form.action = this.uri();
2632 
2633   function complete () {
2634     initIframe();
2635     fn();
2636   }
2637 
2638   function initIframe () {
2639     if (self.iframe) {
2640       try {
2641         self.form.removeChild(self.iframe);
2642       } catch (e) {
2643         self.onError('jsonp polling iframe removal error', e);
2644       }
2645     }
2646 
2647     try {
2648       // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
2649       var html = '<iframe src="javascript:0" name="'+ self.iframeId +'">';
2650       iframe = document.createElement(html);
2651     } catch (e) {
2652       iframe = document.createElement('iframe');
2653       iframe.name = self.iframeId;
2654       iframe.src = 'javascript:0';
2655     }
2656 
2657     iframe.id = self.iframeId;
2658 
2659     self.form.appendChild(iframe);
2660     self.iframe = iframe;
2661   }
2662 
2663   initIframe();
2664 
2665   // escape 
 to prevent it from being converted into 
 by some UAs
2666   // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
2667   data = data.replace(rEscapedNewline, '\
');
2668   this.area.value = data.replace(rNewline, '\n');
2669 
2670   try {
2671     this.form.submit();
2672   } catch(e) {}
2673 
2674   if (this.iframe.attachEvent) {
2675     this.iframe.onreadystatechange = function(){
2676       if (self.iframe.readyState == 'complete') {
2677         complete();
2678       }
2679     };
2680   } else {
2681     this.iframe.onload = complete;
2682   }
2683 };
2684 
2685 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
2686 },{"./polling":18,"component-inherit":21}],17:[function(_dereq_,module,exports){
2687 (function (global){
2688 /**
2689  * Module requirements.
2690  */
2691 
2692 var XMLHttpRequest = _dereq_('xmlhttprequest');
2693 var Polling = _dereq_('./polling');
2694 var Emitter = _dereq_('component-emitter');
2695 var inherit = _dereq_('component-inherit');
2696 var debug = _dereq_('debug')('engine.io-client:polling-xhr');
2697 
2698 /**
2699  * Module exports.
2700  */
2701 
2702 module.exports = XHR;
2703 module.exports.Request = Request;
2704 
2705 /**
2706  * Empty function
2707  */
2708 
2709 function empty(){}
2710 
2711 /**
2712  * XHR Polling constructor.
2713  *
2714  * @param {Object} opts
2715  * @api public
2716  */
2717 
2718 function XHR(opts){
2719   Polling.call(this, opts);
2720 
2721   if (global.location) {
2722     var isSSL = 'https:' == location.protocol;
2723     var port = location.port;
2724 
2725     // some user agents have empty `location.port`
2726     if (!port) {
2727       port = isSSL ? 443 : 80;
2728     }
2729 
2730     this.xd = opts.hostname != global.location.hostname ||
2731       port != opts.port;
2732     this.xs = opts.secure != isSSL;
2733   }
2734 }
2735 
2736 /**
2737  * Inherits from Polling.
2738  */
2739 
2740 inherit(XHR, Polling);
2741 
2742 /**
2743  * XHR supports binary
2744  */
2745 
2746 XHR.prototype.supportsBinary = true;
2747 
2748 /**
2749  * Creates a request.
2750  *
2751  * @param {String} method
2752  * @api private
2753  */
2754 
2755 XHR.prototype.request = function(opts){
2756   opts = opts || {};
2757   opts.uri = this.uri();
2758   opts.xd = this.xd;
2759   opts.xs = this.xs;
2760   opts.agent = this.agent || false;
2761   opts.supportsBinary = this.supportsBinary;
2762   opts.enablesXDR = this.enablesXDR;
2763 
2764   // SSL options for Node.js client
2765   opts.pfx = this.pfx;
2766   opts.key = this.key;
2767   opts.passphrase = this.passphrase;
2768   opts.cert = this.cert;
2769   opts.ca = this.ca;
2770   opts.ciphers = this.ciphers;
2771   opts.rejectUnauthorized = this.rejectUnauthorized;
2772 
2773   return new Request(opts);
2774 };
2775 
2776 /**
2777  * Sends data.
2778  *
2779  * @param {String} data to send.
2780  * @param {Function} called upon flush.
2781  * @api private
2782  */
2783 
2784 XHR.prototype.doWrite = function(data, fn){
2785   var isBinary = typeof data !== 'string' && data !== undefined;
2786   var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
2787   var self = this;
2788   req.on('success', fn);
2789   req.on('error', function(err){
2790     self.onError('xhr post error', err);
2791   });
2792   this.sendXhr = req;
2793 };
2794 
2795 /**
2796  * Starts a poll cycle.
2797  *
2798  * @api private
2799  */
2800 
2801 XHR.prototype.doPoll = function(){
2802   debug('xhr poll');
2803   var req = this.request();
2804   var self = this;
2805   req.on('data', function(data){
2806     self.onData(data);
2807   });
2808   req.on('error', function(err){
2809     self.onError('xhr poll error', err);
2810   });
2811   this.pollXhr = req;
2812 };
2813 
2814 /**
2815  * Request constructor
2816  *
2817  * @param {Object} options
2818  * @api public
2819  */
2820 
2821 function Request(opts){
2822   this.method = opts.method || 'GET';
2823   this.uri = opts.uri;
2824   this.xd = !!opts.xd;
2825   this.xs = !!opts.xs;
2826   this.async = false !== opts.async;
2827   this.data = undefined != opts.data ? opts.data : null;
2828   this.agent = opts.agent;
2829   this.isBinary = opts.isBinary;
2830   this.supportsBinary = opts.supportsBinary;
2831   this.enablesXDR = opts.enablesXDR;
2832 
2833   // SSL options for Node.js client
2834   this.pfx = opts.pfx;
2835   this.key = opts.key;
2836   this.passphrase = opts.passphrase;
2837   this.cert = opts.cert;
2838   this.ca = opts.ca;
2839   this.ciphers = opts.ciphers;
2840   this.rejectUnauthorized = opts.rejectUnauthorized;
2841 
2842   this.create();
2843 }
2844 
2845 /**
2846  * Mix in `Emitter`.
2847  */
2848 
2849 Emitter(Request.prototype);
2850 
2851 /**
2852  * Creates the XHR object and sends the request.
2853  *
2854  * @api private
2855  */
2856 
2857 Request.prototype.create = function(){
2858   var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };
2859 
2860   // SSL options for Node.js client
2861   opts.pfx = this.pfx;
2862   opts.key = this.key;
2863   opts.passphrase = this.passphrase;
2864   opts.cert = this.cert;
2865   opts.ca = this.ca;
2866   opts.ciphers = this.ciphers;
2867   opts.rejectUnauthorized = this.rejectUnauthorized;
2868 
2869   var xhr = this.xhr = new XMLHttpRequest(opts);
2870   var self = this;
2871 
2872   try {
2873     debug('xhr open %s: %s', this.method, this.uri);
2874     xhr.open(this.method, this.uri, this.async);
2875     if (this.supportsBinary) {
2876       // This has to be done after open because Firefox is stupid
2877       // http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
2878       xhr.responseType = 'arraybuffer';
2879     }
2880 
2881     if ('POST' == this.method) {
2882       try {
2883         if (this.isBinary) {
2884           xhr.setRequestHeader('Content-type', 'application/octet-stream');
2885         } else {
2886           xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
2887         }
2888       } catch (e) {}
2889     }
2890 
2891     // ie6 check
2892     if ('withCredentials' in xhr) {
2893       xhr.withCredentials = true;
2894     }
2895 
2896     if (this.hasXDR()) {
2897       xhr.onload = function(){
2898         self.onLoad();
2899       };
2900       xhr.onerror = function(){
2901         self.onError(xhr.responseText);
2902       };
2903     } else {
2904       xhr.onreadystatechange = function(){
2905         if (4 != xhr.readyState) return;
2906         if (200 == xhr.status || 1223 == xhr.status) {
2907           self.onLoad();
2908         } else {
2909           // make sure the `error` event handler that's user-set
2910           // does not throw in the same tick and gets caught here
2911           setTimeout(function(){
2912             self.onError(xhr.status);
2913           }, 0);
2914         }
2915       };
2916     }
2917 
2918     debug('xhr data %s', this.data);
2919     xhr.send(this.data);
2920   } catch (e) {
2921     // Need to defer since .create() is called directly fhrom the constructor
2922     // and thus the 'error' event can only be only bound *after* this exception
2923     // occurs.  Therefore, also, we cannot throw here at all.
2924     setTimeout(function() {
2925       self.onError(e);
2926     }, 0);
2927     return;
2928   }
2929 
2930   if (global.document) {
2931     this.index = Request.requestsCount++;
2932     Request.requests[this.index] = this;
2933   }
2934 };
2935 
2936 /**
2937  * Called upon successful response.
2938  *
2939  * @api private
2940  */
2941 
2942 Request.prototype.onSuccess = function(){
2943   this.emit('success');
2944   this.cleanup();
2945 };
2946 
2947 /**
2948  * Called if we have data.
2949  *
2950  * @api private
2951  */
2952 
2953 Request.prototype.onData = function(data){
2954   this.emit('data', data);
2955   this.onSuccess();
2956 };
2957 
2958 /**
2959  * Called upon error.
2960  *
2961  * @api private
2962  */
2963 
2964 Request.prototype.onError = function(err){
2965   this.emit('error', err);
2966   this.cleanup(true);
2967 };
2968 
2969 /**
2970  * Cleans up house.
2971  *
2972  * @api private
2973  */
2974 
2975 Request.prototype.cleanup = function(fromError){
2976   if ('undefined' == typeof this.xhr || null === this.xhr) {
2977     return;
2978   }
2979   // xmlhttprequest
2980   if (this.hasXDR()) {
2981     this.xhr.onload = this.xhr.onerror = empty;
2982   } else {
2983     this.xhr.onreadystatechange = empty;
2984   }
2985 
2986   if (fromError) {
2987     try {
2988       this.xhr.abort();
2989     } catch(e) {}
2990   }
2991 
2992   if (global.document) {
2993     delete Request.requests[this.index];
2994   }
2995 
2996   this.xhr = null;
2997 };
2998 
2999 /**
3000  * Called upon load.
3001  *
3002  * @api private
3003  */
3004 
3005 Request.prototype.onLoad = function(){
3006   var data;
3007   try {
3008     var contentType;
3009     try {
3010       contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
3011     } catch (e) {}
3012     if (contentType === 'application/octet-stream') {
3013       data = this.xhr.response;
3014     } else {
3015       if (!this.supportsBinary) {
3016         data = this.xhr.responseText;
3017       } else {
3018         data = 'ok';
3019       }
3020     }
3021   } catch (e) {
3022     this.onError(e);
3023   }
3024   if (null != data) {
3025     this.onData(data);
3026   }
3027 };
3028 
3029 /**
3030  * Check if it has XDomainRequest.
3031  *
3032  * @api private
3033  */
3034 
3035 Request.prototype.hasXDR = function(){
3036   return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
3037 };
3038 
3039 /**
3040  * Aborts the request.
3041  *
3042  * @api public
3043  */
3044 
3045 Request.prototype.abort = function(){
3046   this.cleanup();
3047 };
3048 
3049 /**
3050  * Aborts pending requests when unloading the window. This is needed to prevent
3051  * memory leaks (e.g. when using IE) and to ensure that no spurious error is
3052  * emitted.
3053  */
3054 
3055 if (global.document) {
3056   Request.requestsCount = 0;
3057   Request.requests = {};
3058   if (global.attachEvent) {
3059     global.attachEvent('onunload', unloadHandler);
3060   } else if (global.addEventListener) {
3061     global.addEventListener('beforeunload', unloadHandler, false);
3062   }
3063 }
3064 
3065 function unloadHandler() {
3066   for (var i in Request.requests) {
3067     if (Request.requests.hasOwnProperty(i)) {
3068       Request.requests[i].abort();
3069     }
3070   }
3071 }
3072 
3073 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
3074 },{"./polling":18,"component-emitter":9,"component-inherit":21,"debug":22,"xmlhttprequest":20}],18:[function(_dereq_,module,exports){
3075 /**
3076  * Module dependencies.
3077  */
3078 
3079 var Transport = _dereq_('../transport');
3080 var parseqs = _dereq_('parseqs');
3081 var parser = _dereq_('engine.io-parser');
3082 var inherit = _dereq_('component-inherit');
3083 var debug = _dereq_('debug')('engine.io-client:polling');
3084 
3085 /**
3086  * Module exports.
3087  */
3088 
3089 module.exports = Polling;
3090 
3091 /**
3092  * Is XHR2 supported?
3093  */
3094 
3095 var hasXHR2 = (function() {
3096   var XMLHttpRequest = _dereq_('xmlhttprequest');
3097   var xhr = new XMLHttpRequest({ xdomain: false });
3098   return null != xhr.responseType;
3099 })();
3100 
3101 /**
3102  * Polling interface.
3103  *
3104  * @param {Object} opts
3105  * @api private
3106  */
3107 
3108 function Polling(opts){
3109   var forceBase64 = (opts && opts.forceBase64);
3110   if (!hasXHR2 || forceBase64) {
3111     this.supportsBinary = false;
3112   }
3113   Transport.call(this, opts);
3114 }
3115 
3116 /**
3117  * Inherits from Transport.
3118  */
3119 
3120 inherit(Polling, Transport);
3121 
3122 /**
3123  * Transport name.
3124  */
3125 
3126 Polling.prototype.name = 'polling';
3127 
3128 /**
3129  * Opens the socket (triggers polling). We write a PING message to determine
3130  * when the transport is open.
3131  *
3132  * @api private
3133  */
3134 
3135 Polling.prototype.doOpen = function(){
3136   this.poll();
3137 };
3138 
3139 /**
3140  * Pauses polling.
3141  *
3142  * @param {Function} callback upon buffers are flushed and transport is paused
3143  * @api private
3144  */
3145 
3146 Polling.prototype.pause = function(onPause){
3147   var pending = 0;
3148   var self = this;
3149 
3150   this.readyState = 'pausing';
3151 
3152   function pause(){
3153     debug('paused');
3154     self.readyState = 'paused';
3155     onPause();
3156   }
3157 
3158   if (this.polling || !this.writable) {
3159     var total = 0;
3160 
3161     if (this.polling) {
3162       debug('we are currently polling - waiting to pause');
3163       total++;
3164       this.once('pollComplete', function(){
3165         debug('pre-pause polling complete');
3166         --total || pause();
3167       });
3168     }
3169 
3170     if (!this.writable) {
3171       debug('we are currently writing - waiting to pause');
3172       total++;
3173       this.once('drain', function(){
3174         debug('pre-pause writing complete');
3175         --total || pause();
3176       });
3177     }
3178   } else {
3179     pause();
3180   }
3181 };
3182 
3183 /**
3184  * Starts polling cycle.
3185  *
3186  * @api public
3187  */
3188 
3189 Polling.prototype.poll = function(){
3190   debug('polling');
3191   this.polling = true;
3192   this.doPoll();
3193   this.emit('poll');
3194 };
3195 
3196 /**
3197  * Overloads onData to detect payloads.
3198  *
3199  * @api private
3200  */
3201 
3202 Polling.prototype.onData = function(data){
3203   var self = this;
3204   debug('polling got data %s', data);
3205   var callback = function(packet, index, total) {
3206     // if its the first message we consider the transport open
3207     if ('opening' == self.readyState) {
3208       self.onOpen();
3209     }
3210 
3211     // if its a close packet, we close the ongoing requests
3212     if ('close' == packet.type) {
3213       self.onClose();
3214       return false;
3215     }
3216 
3217     // otherwise bypass onData and handle the message
3218     self.onPacket(packet);
3219   };
3220 
3221   // decode payload
3222   parser.decodePayload(data, this.socket.binaryType, callback);
3223 
3224   // if an event did not trigger closing
3225   if ('closed' != this.readyState) {
3226     // if we got data we're not polling
3227     this.polling = false;
3228     this.emit('pollComplete');
3229 
3230     if ('open' == this.readyState) {
3231       this.poll();
3232     } else {
3233       debug('ignoring poll - transport state "%s"', this.readyState);
3234     }
3235   }
3236 };
3237 
3238 /**
3239  * For polling, send a close packet.
3240  *
3241  * @api private
3242  */
3243 
3244 Polling.prototype.doClose = function(){
3245   var self = this;
3246 
3247   function close(){
3248     debug('writing close packet');
3249     self.write([{ type: 'close' }]);
3250   }
3251 
3252   if ('open' == this.readyState) {
3253     debug('transport open - closing');
3254     close();
3255   } else {
3256     // in case we're trying to close while
3257     // handshaking is in progress (GH-164)
3258     debug('transport not open - deferring close');
3259     this.once('open', close);
3260   }
3261 };
3262 
3263 /**
3264  * Writes a packets payload.
3265  *
3266  * @param {Array} data packets
3267  * @param {Function} drain callback
3268  * @api private
3269  */
3270 
3271 Polling.prototype.write = function(packets){
3272   var self = this;
3273   this.writable = false;
3274   var callbackfn = function() {
3275     self.writable = true;
3276     self.emit('drain');
3277   };
3278 
3279   var self = this;
3280   parser.encodePayload(packets, this.supportsBinary, function(data) {
3281     self.doWrite(data, callbackfn);
3282   });
3283 };
3284 
3285 /**
3286  * Generates uri for connection.
3287  *
3288  * @api private
3289  */
3290 
3291 Polling.prototype.uri = function(){
3292   var query = this.query || {};
3293   var schema = this.secure ? 'https' : 'http';
3294   var port = '';
3295 
3296   // cache busting is forced
3297   if (false !== this.timestampRequests) {
3298     query[this.timestampParam] = +new Date + '-' + Transport.timestamps++;
3299   }
3300 
3301   if (!this.supportsBinary && !query.sid) {
3302     query.b64 = 1;
3303   }
3304 
3305   query = parseqs.encode(query);
3306 
3307   // avoid port if default for schema
3308   if (this.port && (('https' == schema && this.port != 443) ||
3309      ('http' == schema && this.port != 80))) {
3310     port = ':' + this.port;
3311   }
3312 
3313   // prepend ? to query
3314   if (query.length) {
3315     query = '?' + query;
3316   }
3317 
3318   return schema + '://' + this.hostname + port + this.path + query;
3319 };
3320 
3321 },{"../transport":14,"component-inherit":21,"debug":22,"engine.io-parser":25,"parseqs":33,"xmlhttprequest":20}],19:[function(_dereq_,module,exports){
3322 /**
3323  * Module dependencies.
3324  */
3325 
3326 var Transport = _dereq_('../transport');
3327 var parser = _dereq_('engine.io-parser');
3328 var parseqs = _dereq_('parseqs');
3329 var inherit = _dereq_('component-inherit');
3330 var debug = _dereq_('debug')('engine.io-client:websocket');
3331 
3332 /**
3333  * `ws` exposes a WebSocket-compatible interface in
3334  * Node, or the `WebSocket` or `MozWebSocket` globals
3335  * in the browser.
3336  */
3337 
3338 var WebSocket = _dereq_('ws');
3339 
3340 /**
3341  * Module exports.
3342  */
3343 
3344 module.exports = WS;
3345 
3346 /**
3347  * WebSocket transport constructor.
3348  *
3349  * @api {Object} connection options
3350  * @api public
3351  */
3352 
3353 function WS(opts){
3354   var forceBase64 = (opts && opts.forceBase64);
3355   if (forceBase64) {
3356     this.supportsBinary = false;
3357   }
3358   Transport.call(this, opts);
3359 }
3360 
3361 /**
3362  * Inherits from Transport.
3363  */
3364 
3365 inherit(WS, Transport);
3366 
3367 /**
3368  * Transport name.
3369  *
3370  * @api public
3371  */
3372 
3373 WS.prototype.name = 'websocket';
3374 
3375 /*
3376  * WebSockets support binary
3377  */
3378 
3379 WS.prototype.supportsBinary = true;
3380 
3381 /**
3382  * Opens socket.
3383  *
3384  * @api private
3385  */
3386 
3387 WS.prototype.doOpen = function(){
3388   if (!this.check()) {
3389     // let probe timeout
3390     return;
3391   }
3392 
3393   var self = this;
3394   var uri = this.uri();
3395   var protocols = void(0);
3396   var opts = { agent: this.agent };
3397 
3398   // SSL options for Node.js client
3399   opts.pfx = this.pfx;
3400   opts.key = this.key;
3401   opts.passphrase = this.passphrase;
3402   opts.cert = this.cert;
3403   opts.ca = this.ca;
3404   opts.ciphers = this.ciphers;
3405   opts.rejectUnauthorized = this.rejectUnauthorized;
3406 
3407   this.ws = new WebSocket(uri, protocols, opts);
3408 
3409   if (this.ws.binaryType === undefined) {
3410     this.supportsBinary = false;
3411   }
3412 
3413   this.ws.binaryType = 'arraybuffer';
3414   this.addEventListeners();
3415 };
3416 
3417 /**
3418  * Adds event listeners to the socket
3419  *
3420  * @api private
3421  */
3422 
3423 WS.prototype.addEventListeners = function(){
3424   var self = this;
3425 
3426   this.ws.onopen = function(){
3427     self.onOpen();
3428   };
3429   this.ws.onclose = function(){
3430     self.onClose();
3431   };
3432   this.ws.onmessage = function(ev){
3433     self.onData(ev.data);
3434   };
3435   this.ws.onerror = function(e){
3436     self.onError('websocket error', e);
3437   };
3438 };
3439 
3440 /**
3441  * Override `onData` to use a timer on iOS.
3442  * See: https://gist.github.com/mloughran/2052006
3443  *
3444  * @api private
3445  */
3446 
3447 if ('undefined' != typeof navigator
3448   && /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
3449   WS.prototype.onData = function(data){
3450     var self = this;
3451     setTimeout(function(){
3452       Transport.prototype.onData.call(self, data);
3453     }, 0);
3454   };
3455 }
3456 
3457 /**
3458  * Writes data to socket.
3459  *
3460  * @param {Array} array of packets.
3461  * @api private
3462  */
3463 
3464 WS.prototype.write = function(packets){
3465   var self = this;
3466   this.writable = false;
3467   // encodePacket efficient as it uses WS framing
3468   // no need for encodePayload
3469   for (var i = 0, l = packets.length; i < l; i++) {
3470     parser.encodePacket(packets[i], this.supportsBinary, function(data) {
3471       //Sometimes the websocket has already been closed but the browser didn't
3472       //have a chance of informing us about it yet, in that case send will
3473       //throw an error
3474       try {
3475         self.ws.send(data);
3476       } catch (e){
3477         debug('websocket closed before onclose event');
3478       }
3479     });
3480   }
3481 
3482   function ondrain() {
3483     self.writable = true;
3484     self.emit('drain');
3485   }
3486   // fake drain
3487   // defer to next tick to allow Socket to clear writeBuffer
3488   setTimeout(ondrain, 0);
3489 };
3490 
3491 /**
3492  * Called upon close
3493  *
3494  * @api private
3495  */
3496 
3497 WS.prototype.onClose = function(){
3498   Transport.prototype.onClose.call(this);
3499 };
3500 
3501 /**
3502  * Closes socket.
3503  *
3504  * @api private
3505  */
3506 
3507 WS.prototype.doClose = function(){
3508   if (typeof this.ws !== 'undefined') {
3509     this.ws.close();
3510   }
3511 };
3512 
3513 /**
3514  * Generates uri for connection.
3515  *
3516  * @api private
3517  */
3518 
3519 WS.prototype.uri = function(){
3520   var query = this.query || {};
3521   var schema = this.secure ? 'wss' : 'ws';
3522   var port = '';
3523 
3524   // avoid port if default for schema
3525   if (this.port && (('wss' == schema && this.port != 443)
3526     || ('ws' == schema && this.port != 80))) {
3527     port = ':' + this.port;
3528   }
3529 
3530   // append timestamp to URI
3531   if (this.timestampRequests) {
3532     query[this.timestampParam] = +new Date;
3533   }
3534 
3535   // communicate binary support capabilities
3536   if (!this.supportsBinary) {
3537     query.b64 = 1;
3538   }
3539 
3540   query = parseqs.encode(query);
3541 
3542   // prepend ? to query
3543   if (query.length) {
3544     query = '?' + query;
3545   }
3546 
3547   return schema + '://' + this.hostname + port + this.path + query;
3548 };
3549 
3550 /**
3551  * Feature detection for WebSocket.
3552  *
3553  * @return {Boolean} whether this transport is available.
3554  * @api public
3555  */
3556 
3557 WS.prototype.check = function(){
3558   return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
3559 };
3560 
3561 },{"../transport":14,"component-inherit":21,"debug":22,"engine.io-parser":25,"parseqs":33,"ws":35}],20:[function(_dereq_,module,exports){
3562 // browser shim for xmlhttprequest module
3563 var hasCORS = _dereq_('has-cors');
3564 
3565 module.exports = function(opts) {
3566   var xdomain = opts.xdomain;
3567 
3568   // scheme must be same when usign XDomainRequest
3569   // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
3570   var xscheme = opts.xscheme;
3571 
3572   // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
3573   // https://github.com/Automattic/engine.io-client/pull/217
3574   var enablesXDR = opts.enablesXDR;
3575 
3576   // XMLHttpRequest can be disabled on IE
3577   try {
3578     if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
3579       return new XMLHttpRequest();
3580     }
3581   } catch (e) { }
3582 
3583   // Use XDomainRequest for IE8 if enablesXDR is true
3584   // because loading bar keeps flashing when using jsonp-polling
3585   // https://github.com/yujiosaka/socke.io-ie8-loading-example
3586   try {
3587     if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
3588       return new XDomainRequest();
3589     }
3590   } catch (e) { }
3591 
3592   if (!xdomain) {
3593     try {
3594       return new ActiveXObject('Microsoft.XMLHTTP');
3595     } catch(e) { }
3596   }
3597 }
3598 
3599 },{"has-cors":38}],21:[function(_dereq_,module,exports){
3600 
3601 module.exports = function(a, b){
3602   var fn = function(){};
3603   fn.prototype = b.prototype;
3604   a.prototype = new fn;
3605   a.prototype.constructor = a;
3606 };
3607 },{}],22:[function(_dereq_,module,exports){
3608 
3609 /**
3610  * This is the web browser implementation of `debug()`.
3611  *
3612  * Expose `debug()` as the module.
3613  */
3614 
3615 exports = module.exports = _dereq_('./debug');
3616 exports.log = log;
3617 exports.formatArgs = formatArgs;
3618 exports.save = save;
3619 exports.load = load;
3620 exports.useColors = useColors;
3621 
3622 /**
3623  * Colors.
3624  */
3625 
3626 exports.colors = [
3627   'lightseagreen',
3628   'forestgreen',
3629   'goldenrod',
3630   'dodgerblue',
3631   'darkorchid',
3632   'crimson'
3633 ];
3634 
3635 /**
3636  * Currently only WebKit-based Web Inspectors, Firefox >= v31,
3637  * and the Firebug extension (any Firefox version) are known
3638  * to support "%c" CSS customizations.
3639  *
3640  * TODO: add a `localStorage` variable to explicitly enable/disable colors
3641  */
3642 
3643 function useColors() {
3644   // is webkit? http://stackoverflow.com/a/16459606/376773
3645   return ('WebkitAppearance' in document.documentElement.style) ||
3646     // is firebug? http://stackoverflow.com/a/398120/376773
3647     (window.console && (console.firebug || (console.exception && console.table))) ||
3648     // is firefox >= v31?
3649     // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
3650     (navigator.userAgent.toLowerCase().match(/firefox/(d+)/) && parseInt(RegExp.$1, 10) >= 31);
3651 }
3652 
3653 /**
3654  * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
3655  */
3656 
3657 exports.formatters.j = function(v) {
3658   return JSON.stringify(v);
3659 };
3660 
3661 
3662 /**
3663  * Colorize log arguments if enabled.
3664  *
3665  * @api public
3666  */
3667 
3668 function formatArgs() {
3669   var args = arguments;
3670   var useColors = this.useColors;
3671 
3672   args[0] = (useColors ? '%c' : '')
3673     + this.namespace
3674     + (useColors ? ' %c' : ' ')
3675     + args[0]
3676     + (useColors ? '%c ' : ' ')
3677     + '+' + exports.humanize(this.diff);
3678 
3679   if (!useColors) return args;
3680 
3681   var c = 'color: ' + this.color;
3682   args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));
3683 
3684   // the final "%c" is somewhat tricky, because there could be other
3685   // arguments passed either before or after the %c, so we need to
3686   // figure out the correct index to insert the CSS into
3687   var index = 0;
3688   var lastC = 0;
3689   args[0].replace(/%[a-z%]/g, function(match) {
3690     if ('%%' === match) return;
3691     index++;
3692     if ('%c' === match) {
3693       // we only are interested in the *last* %c
3694       // (the user may have provided their own)
3695       lastC = index;
3696     }
3697   });
3698 
3699   args.splice(lastC, 0, c);
3700   return args;
3701 }
3702 
3703 /**
3704  * Invokes `console.log()` when available.
3705  * No-op when `console.log` is not a "function".
3706  *
3707  * @api public
3708  */
3709 
3710 function log() {
3711   // This hackery is required for IE8,
3712   // where the `console.log` function doesn't have 'apply'
3713   return 'object' == typeof console
3714     && 'function' == typeof console.log
3715     && Function.prototype.apply.call(console.log, console, arguments);
3716 }
3717 
3718 /**
3719  * Save `namespaces`.
3720  *
3721  * @param {String} namespaces
3722  * @api private
3723  */
3724 
3725 function save(namespaces) {
3726   try {
3727     if (null == namespaces) {
3728       localStorage.removeItem('debug');
3729     } else {
3730       localStorage.debug = namespaces;
3731     }
3732   } catch(e) {}
3733 }
3734 
3735 /**
3736  * Load `namespaces`.
3737  *
3738  * @return {String} returns the previously persisted debug modes
3739  * @api private
3740  */
3741 
3742 function load() {
3743   var r;
3744   try {
3745     r = localStorage.debug;
3746   } catch(e) {}
3747   return r;
3748 }
3749 
3750 /**
3751  * Enable namespaces listed in `localStorage.debug` initially.
3752  */
3753 
3754 exports.enable(load());
3755 
3756 },{"./debug":23}],23:[function(_dereq_,module,exports){
3757 
3758 /**
3759  * This is the common logic for both the Node.js and web browser
3760  * implementations of `debug()`.
3761  *
3762  * Expose `debug()` as the module.
3763  */
3764 
3765 exports = module.exports = debug;
3766 exports.coerce = coerce;
3767 exports.disable = disable;
3768 exports.enable = enable;
3769 exports.enabled = enabled;
3770 exports.humanize = _dereq_('ms');
3771 
3772 /**
3773  * The currently active debug mode names, and names to skip.
3774  */
3775 
3776 exports.names = [];
3777 exports.skips = [];
3778 
3779 /**
3780  * Map of special "%n" handling functions, for the debug "format" argument.
3781  *
3782  * Valid key names are a single, lowercased letter, i.e. "n".
3783  */
3784 
3785 exports.formatters = {};
3786 
3787 /**
3788  * Previously assigned color.
3789  */
3790 
3791 var prevColor = 0;
3792 
3793 /**
3794  * Previous log timestamp.
3795  */
3796 
3797 var prevTime;
3798 
3799 /**
3800  * Select a color.
3801  *
3802  * @return {Number}
3803  * @api private
3804  */
3805 
3806 function selectColor() {
3807   return exports.colors[prevColor++ % exports.colors.length];
3808 }
3809 
3810 /**
3811  * Create a debugger with the given `namespace`.
3812  *
3813  * @param {String} namespace
3814  * @return {Function}
3815  * @api public
3816  */
3817 
3818 function debug(namespace) {
3819 
3820   // define the `disabled` version
3821   function disabled() {
3822   }
3823   disabled.enabled = false;
3824 
3825   // define the `enabled` version
3826   function enabled() {
3827 
3828     var self = enabled;
3829 
3830     // set `diff` timestamp
3831     var curr = +new Date();
3832     var ms = curr - (prevTime || curr);
3833     self.diff = ms;
3834     self.prev = prevTime;
3835     self.curr = curr;
3836     prevTime = curr;
3837 
3838     // add the `color` if not set
3839     if (null == self.useColors) self.useColors = exports.useColors();
3840     if (null == self.color && self.useColors) self.color = selectColor();
3841 
3842     var args = Array.prototype.slice.call(arguments);
3843 
3844     args[0] = exports.coerce(args[0]);
3845 
3846     if ('string' !== typeof args[0]) {
3847       // anything else let's inspect with %o
3848       args = ['%o'].concat(args);
3849     }
3850 
3851     // apply any `formatters` transformations
3852     var index = 0;
3853     args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
3854       // if we encounter an escaped % then don't increase the array index
3855       if (match === '%%') return match;
3856       index++;
3857       var formatter = exports.formatters[format];
3858       if ('function' === typeof formatter) {
3859         var val = args[index];
3860         match = formatter.call(self, val);
3861 
3862         // now we need to remove `args[index]` since it's inlined in the `format`
3863         args.splice(index, 1);
3864         index--;
3865       }
3866       return match;
3867     });
3868 
3869     if ('function' === typeof exports.formatArgs) {
3870       args = exports.formatArgs.apply(self, args);
3871     }
3872     var logFn = enabled.log || exports.log || console.log.bind(console);
3873     logFn.apply(self, args);
3874   }
3875   enabled.enabled = true;
3876 
3877   var fn = exports.enabled(namespace) ? enabled : disabled;
3878 
3879   fn.namespace = namespace;
3880 
3881   return fn;
3882 }
3883 
3884 /**
3885  * Enables a debug mode by namespaces. This can include modes
3886  * separated by a colon and wildcards.
3887  *
3888  * @param {String} namespaces
3889  * @api public
3890  */
3891 
3892 function enable(namespaces) {
3893   exports.save(namespaces);
3894 
3895   var split = (namespaces || '').split(/[s,]+/);
3896   var len = split.length;
3897 
3898   for (var i = 0; i < len; i++) {
3899     if (!split[i]) continue; // ignore empty strings
3900     namespaces = split[i].replace(/*/g, '.*?');
3901     if (namespaces[0] === '-') {
3902       exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
3903     } else {
3904       exports.names.push(new RegExp('^' + namespaces + '$'));
3905     }
3906   }
3907 }
3908 
3909 /**
3910  * Disable debug output.
3911  *
3912  * @api public
3913  */
3914 
3915 function disable() {
3916   exports.enable('');
3917 }
3918 
3919 /**
3920  * Returns true if the given mode name is enabled, false otherwise.
3921  *
3922  * @param {String} name
3923  * @return {Boolean}
3924  * @api public
3925  */
3926 
3927 function enabled(name) {
3928   var i, len;
3929   for (i = 0, len = exports.skips.length; i < len; i++) {
3930     if (exports.skips[i].test(name)) {
3931       return false;
3932     }
3933   }
3934   for (i = 0, len = exports.names.length; i < len; i++) {
3935     if (exports.names[i].test(name)) {
3936       return true;
3937     }
3938   }
3939   return false;
3940 }
3941 
3942 /**
3943  * Coerce `val`.
3944  *
3945  * @param {Mixed} val
3946  * @return {Mixed}
3947  * @api private
3948  */
3949 
3950 function coerce(val) {
3951   if (val instanceof Error) return val.stack || val.message;
3952   return val;
3953 }
3954 
3955 },{"ms":24}],24:[function(_dereq_,module,exports){
3956 /**
3957  * Helpers.
3958  */
3959 
3960 var s = 1000;
3961 var m = s * 60;
3962 var h = m * 60;
3963 var d = h * 24;
3964 var y = d * 365.25;
3965 
3966 /**
3967  * Parse or format the given `val`.
3968  *
3969  * Options:
3970  *
3971  *  - `long` verbose formatting [false]
3972  *
3973  * @param {String|Number} val
3974  * @param {Object} options
3975  * @return {String|Number}
3976  * @api public
3977  */
3978 
3979 module.exports = function(val, options){
3980   options = options || {};
3981   if ('string' == typeof val) return parse(val);
3982   return options.long
3983     ? long(val)
3984     : short(val);
3985 };
3986 
3987 /**
3988  * Parse the given `str` and return milliseconds.
3989  *
3990  * @param {String} str
3991  * @return {Number}
3992  * @api private
3993  */
3994 
3995 function parse(str) {
3996   var match = /^((?:d+)?.?d+) *(ms|seconds?|s|minutes?|m|hours?|h|days?|d|years?|y)?$/i.exec(str);
3997   if (!match) return;
3998   var n = parseFloat(match[1]);
3999   var type = (match[2] || 'ms').toLowerCase();
4000   switch (type) {
4001     case 'years':
4002     case 'year':
4003     case 'y':
4004       return n * y;
4005     case 'days':
4006     case 'day':
4007     case 'd':
4008       return n * d;
4009     case 'hours':
4010     case 'hour':
4011     case 'h':
4012       return n * h;
4013     case 'minutes':
4014     case 'minute':
4015     case 'm':
4016       return n * m;
4017     case 'seconds':
4018     case 'second':
4019     case 's':
4020       return n * s;
4021     case 'ms':
4022       return n;
4023   }
4024 }
4025 
4026 /**
4027  * Short format for `ms`.
4028  *
4029  * @param {Number} ms
4030  * @return {String}
4031  * @api private
4032  */
4033 
4034 function short(ms) {
4035   if (ms >= d) return Math.round(ms / d) + 'd';
4036   if (ms >= h) return Math.round(ms / h) + 'h';
4037   if (ms >= m) return Math.round(ms / m) + 'm';
4038   if (ms >= s) return Math.round(ms / s) + 's';
4039   return ms + 'ms';
4040 }
4041 
4042 /**
4043  * Long format for `ms`.
4044  *
4045  * @param {Number} ms
4046  * @return {String}
4047  * @api private
4048  */
4049 
4050 function long(ms) {
4051   return plural(ms, d, 'day')
4052     || plural(ms, h, 'hour')
4053     || plural(ms, m, 'minute')
4054     || plural(ms, s, 'second')
4055     || ms + ' ms';
4056 }
4057 
4058 /**
4059  * Pluralization helper.
4060  */
4061 
4062 function plural(ms, n, name) {
4063   if (ms < n) return;
4064   if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
4065   return Math.ceil(ms / n) + ' ' + name + 's';
4066 }
4067 
4068 },{}],25:[function(_dereq_,module,exports){
4069 (function (global){
4070 /**
4071  * Module dependencies.
4072  */
4073 
4074 var keys = _dereq_('./keys');
4075 var hasBinary = _dereq_('has-binary');
4076 var sliceBuffer = _dereq_('arraybuffer.slice');
4077 var base64encoder = _dereq_('base64-arraybuffer');
4078 var after = _dereq_('after');
4079 var utf8 = _dereq_('utf8');
4080 
4081 /**
4082  * Check if we are running an android browser. That requires us to use
4083  * ArrayBuffer with polling transports...
4084  *
4085  * http://ghinda.net/jpeg-blob-ajax-android/
4086  */
4087 
4088 var isAndroid = navigator.userAgent.match(/Android/i);
4089 
4090 /**
4091  * Check if we are running in PhantomJS.
4092  * Uploading a Blob with PhantomJS does not work correctly, as reported here:
4093  * https://github.com/ariya/phantomjs/issues/11395
4094  * @type boolean
4095  */
4096 var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);
4097 
4098 /**
4099  * When true, avoids using Blobs to encode payloads.
4100  * @type boolean
4101  */
4102 var dontSendBlobs = isAndroid || isPhantomJS;
4103 
4104 /**
4105  * Current protocol version.
4106  */
4107 
4108 exports.protocol = 3;
4109 
4110 /**
4111  * Packet types.
4112  */
4113 
4114 var packets = exports.packets = {
4115     open:     0    // non-ws
4116   , close:    1    // non-ws
4117   , ping:     2
4118   , pong:     3
4119   , message:  4
4120   , upgrade:  5
4121   , noop:     6
4122 };
4123 
4124 var packetslist = keys(packets);
4125 
4126 /**
4127  * Premade error packet.
4128  */
4129 
4130 var err = { type: 'error', data: 'parser error' };
4131 
4132 /**
4133  * Create a blob api even for blob builder when vendor prefixes exist
4134  */
4135 
4136 var Blob = _dereq_('blob');
4137 
4138 /**
4139  * Encodes a packet.
4140  *
4141  *     <packet type id> [ <data> ]
4142  *
4143  * Example:
4144  *
4145  *     5hello world
4146  *     3
4147  *     4
4148  *
4149  * Binary is encoded in an identical principle
4150  *
4151  * @api private
4152  */
4153 
4154 exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
4155   if ('function' == typeof supportsBinary) {
4156     callback = supportsBinary;
4157     supportsBinary = false;
4158   }
4159 
4160   if ('function' == typeof utf8encode) {
4161     callback = utf8encode;
4162     utf8encode = null;
4163   }
4164 
4165   var data = (packet.data === undefined)
4166     ? undefined
4167     : packet.data.buffer || packet.data;
4168 
4169   if (global.ArrayBuffer && data instanceof ArrayBuffer) {
4170     return encodeArrayBuffer(packet, supportsBinary, callback);
4171   } else if (Blob && data instanceof global.Blob) {
4172     return encodeBlob(packet, supportsBinary, callback);
4173   }
4174 
4175   // might be an object with { base64: true, data: dataAsBase64String }
4176   if (data && data.base64) {
4177     return encodeBase64Object(packet, callback);
4178   }
4179 
4180   // Sending data as a utf-8 string
4181   var encoded = packets[packet.type];
4182 
4183   // data fragment is optional
4184   if (undefined !== packet.data) {
4185     encoded += utf8encode ? utf8.encode(String(packet.data)) : String(packet.data);
4186   }
4187 
4188   return callback('' + encoded);
4189 
4190 };
4191 
4192 function encodeBase64Object(packet, callback) {
4193   // packet data is an object { base64: true, data: dataAsBase64String }
4194   var message = 'b' + exports.packets[packet.type] + packet.data.data;
4195   return callback(message);
4196 }
4197 
4198 /**
4199  * Encode packet helpers for binary types
4200  */
4201 
4202 function encodeArrayBuffer(packet, supportsBinary, callback) {
4203   if (!supportsBinary) {
4204     return exports.encodeBase64Packet(packet, callback);
4205   }
4206 
4207   var data = packet.data;
4208   var contentArray = new Uint8Array(data);
4209   var resultBuffer = new Uint8Array(1 + data.byteLength);
4210 
4211   resultBuffer[0] = packets[packet.type];
4212   for (var i = 0; i < contentArray.length; i++) {
4213     resultBuffer[i+1] = contentArray[i];
4214   }
4215 
4216   return callback(resultBuffer.buffer);
4217 }
4218 
4219 function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
4220   if (!supportsBinary) {
4221     return exports.encodeBase64Packet(packet, callback);
4222   }
4223 
4224   var fr = new FileReader();
4225   fr.onload = function() {
4226     packet.data = fr.result;
4227     exports.encodePacket(packet, supportsBinary, true, callback);
4228   };
4229   return fr.readAsArrayBuffer(packet.data);
4230 }
4231 
4232 function encodeBlob(packet, supportsBinary, callback) {
4233   if (!supportsBinary) {
4234     return exports.encodeBase64Packet(packet, callback);
4235   }
4236 
4237   if (dontSendBlobs) {
4238     return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
4239   }
4240 
4241   var length = new Uint8Array(1);
4242   length[0] = packets[packet.type];
4243   var blob = new Blob([length.buffer, packet.data]);
4244 
4245   return callback(blob);
4246 }
4247 
4248 /**
4249  * Encodes a packet with binary data in a base64 string
4250  *
4251  * @param {Object} packet, has `type` and `data`
4252  * @return {String} base64 encoded message
4253  */
4254 
4255 exports.encodeBase64Packet = function(packet, callback) {
4256   var message = 'b' + exports.packets[packet.type];
4257   if (Blob && packet.data instanceof Blob) {
4258     var fr = new FileReader();
4259     fr.onload = function() {
4260       var b64 = fr.result.split(',')[1];
4261       callback(message + b64);
4262     };
4263     return fr.readAsDataURL(packet.data);
4264   }
4265 
4266   var b64data;
4267   try {
4268     b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
4269   } catch (e) {
4270     // iPhone Safari doesn't let you apply with typed arrays
4271     var typed = new Uint8Array(packet.data);
4272     var basic = new Array(typed.length);
4273     for (var i = 0; i < typed.length; i++) {
4274       basic[i] = typed[i];
4275     }
4276     b64data = String.fromCharCode.apply(null, basic);
4277   }
4278   message += global.btoa(b64data);
4279   return callback(message);
4280 };
4281 
4282 /**
4283  * Decodes a packet. Changes format to Blob if requested.
4284  *
4285  * @return {Object} with `type` and `data` (if any)
4286  * @api private
4287  */
4288 
4289 exports.decodePacket = function (data, binaryType, utf8decode) {
4290   // String data
4291   if (typeof data == 'string' || data === undefined) {
4292     if (data.charAt(0) == 'b') {
4293       return exports.decodeBase64Packet(data.substr(1), binaryType);
4294     }
4295 
4296     if (utf8decode) {
4297       try {
4298         data = utf8.decode(data);
4299       } catch (e) {
4300         return err;
4301       }
4302     }
4303     var type = data.charAt(0);
4304 
4305     if (Number(type) != type || !packetslist[type]) {
4306       return err;
4307     }
4308 
4309     if (data.length > 1) {
4310       return { type: packetslist[type], data: data.substring(1) };
4311     } else {
4312       return { type: packetslist[type] };
4313     }
4314   }
4315 
4316   var asArray = new Uint8Array(data);
4317   var type = asArray[0];
4318   var rest = sliceBuffer(data, 1);
4319   if (Blob && binaryType === 'blob') {
4320     rest = new Blob([rest]);
4321   }
4322   return { type: packetslist[type], data: rest };
4323 };
4324 
4325 /**
4326  * Decodes a packet encoded in a base64 string
4327  *
4328  * @param {String} base64 encoded message
4329  * @return {Object} with `type` and `data` (if any)
4330  */
4331 
4332 exports.decodeBase64Packet = function(msg, binaryType) {
4333   var type = packetslist[msg.charAt(0)];
4334   if (!global.ArrayBuffer) {
4335     return { type: type, data: { base64: true, data: msg.substr(1) } };
4336   }
4337 
4338   var data = base64encoder.decode(msg.substr(1));
4339 
4340   if (binaryType === 'blob' && Blob) {
4341     data = new Blob([data]);
4342   }
4343 
4344   return { type: type, data: data };
4345 };
4346 
4347 /**
4348  * Encodes multiple messages (payload).
4349  *
4350  *     <length>:data
4351  *
4352  * Example:
4353  *
4354  *     11:hello world2:hi
4355  *
4356  * If any contents are binary, they will be encoded as base64 strings. Base64
4357  * encoded strings are marked with a b before the length specifier
4358  *
4359  * @param {Array} packets
4360  * @api private
4361  */
4362 
4363 exports.encodePayload = function (packets, supportsBinary, callback) {
4364   if (typeof supportsBinary == 'function') {
4365     callback = supportsBinary;
4366     supportsBinary = null;
4367   }
4368 
4369   var isBinary = hasBinary(packets);
4370 
4371   if (supportsBinary && isBinary) {
4372     if (Blob && !dontSendBlobs) {
4373       return exports.encodePayloadAsBlob(packets, callback);
4374     }
4375 
4376     return exports.encodePayloadAsArrayBuffer(packets, callback);
4377   }
4378 
4379   if (!packets.length) {
4380     return callback('0:');
4381   }
4382 
4383   function setLengthHeader(message) {
4384     return message.length + ':' + message;
4385   }
4386 
4387   function encodeOne(packet, doneCallback) {
4388     exports.encodePacket(packet, !isBinary ? false : supportsBinary, true, function(message) {
4389       doneCallback(null, setLengthHeader(message));
4390     });
4391   }
4392 
4393   map(packets, encodeOne, function(err, results) {
4394     return callback(results.join(''));
4395   });
4396 };
4397 
4398 /**
4399  * Async array map using after
4400  */
4401 
4402 function map(ary, each, done) {
4403   var result = new Array(ary.length);
4404   var next = after(ary.length, done);
4405 
4406   var eachWithIndex = function(i, el, cb) {
4407     each(el, function(error, msg) {
4408       result[i] = msg;
4409       cb(error, result);
4410     });
4411   };
4412 
4413   for (var i = 0; i < ary.length; i++) {
4414     eachWithIndex(i, ary[i], next);
4415   }
4416 }
4417 
4418 /*
4419  * Decodes data when a payload is maybe expected. Possible binary contents are
4420  * decoded from their base64 representation
4421  *
4422  * @param {String} data, callback method
4423  * @api public
4424  */
4425 
4426 exports.decodePayload = function (data, binaryType, callback) {
4427   if (typeof data != 'string') {
4428     return exports.decodePayloadAsBinary(data, binaryType, callback);
4429   }
4430 
4431   if (typeof binaryType === 'function') {
4432     callback = binaryType;
4433     binaryType = null;
4434   }
4435 
4436   var packet;
4437   if (data == '') {
4438     // parser error - ignoring payload
4439     return callback(err, 0, 1);
4440   }
4441 
4442   var length = ''
4443     , n, msg;
4444 
4445   for (var i = 0, l = data.length; i < l; i++) {
4446     var chr = data.charAt(i);
4447 
4448     if (':' != chr) {
4449       length += chr;
4450     } else {
4451       if ('' == length || (length != (n = Number(length)))) {
4452         // parser error - ignoring payload
4453         return callback(err, 0, 1);
4454       }
4455 
4456       msg = data.substr(i + 1, n);
4457 
4458       if (length != msg.length) {
4459         // parser error - ignoring payload
4460         return callback(err, 0, 1);
4461       }
4462 
4463       if (msg.length) {
4464         packet = exports.decodePacket(msg, binaryType, true);
4465 
4466         if (err.type == packet.type && err.data == packet.data) {
4467           // parser error in individual packet - ignoring payload
4468           return callback(err, 0, 1);
4469         }
4470 
4471         var ret = callback(packet, i + n, l);
4472         if (false === ret) return;
4473       }
4474 
4475       // advance cursor
4476       i += n;
4477       length = '';
4478     }
4479   }
4480 
4481   if (length != '') {
4482     // parser error - ignoring payload
4483     return callback(err, 0, 1);
4484   }
4485 
4486 };
4487 
4488 /**
4489  * Encodes multiple messages (payload) as binary.
4490  *
4491  * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
4492  * 255><data>
4493  *
4494  * Example:
4495  * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
4496  *
4497  * @param {Array} packets
4498  * @return {ArrayBuffer} encoded payload
4499  * @api private
4500  */
4501 
4502 exports.encodePayloadAsArrayBuffer = function(packets, callback) {
4503   if (!packets.length) {
4504     return callback(new ArrayBuffer(0));
4505   }
4506 
4507   function encodeOne(packet, doneCallback) {
4508     exports.encodePacket(packet, true, true, function(data) {
4509       return doneCallback(null, data);
4510     });
4511   }
4512 
4513   map(packets, encodeOne, function(err, encodedPackets) {
4514     var totalLength = encodedPackets.reduce(function(acc, p) {
4515       var len;
4516       if (typeof p === 'string'){
4517         len = p.length;
4518       } else {
4519         len = p.byteLength;
4520       }
4521       return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
4522     }, 0);
4523 
4524     var resultArray = new Uint8Array(totalLength);
4525 
4526     var bufferIndex = 0;
4527     encodedPackets.forEach(function(p) {
4528       var isString = typeof p === 'string';
4529       var ab = p;
4530       if (isString) {
4531         var view = new Uint8Array(p.length);
4532         for (var i = 0; i < p.length; i++) {
4533           view[i] = p.charCodeAt(i);
4534         }
4535         ab = view.buffer;
4536       }
4537 
4538       if (isString) { // not true binary
4539         resultArray[bufferIndex++] = 0;
4540       } else { // true binary
4541         resultArray[bufferIndex++] = 1;
4542       }
4543 
4544       var lenStr = ab.byteLength.toString();
4545       for (var i = 0; i < lenStr.length; i++) {
4546         resultArray[bufferIndex++] = parseInt(lenStr[i]);
4547       }
4548       resultArray[bufferIndex++] = 255;
4549 
4550       var view = new Uint8Array(ab);
4551       for (var i = 0; i < view.length; i++) {
4552         resultArray[bufferIndex++] = view[i];
4553       }
4554     });
4555 
4556     return callback(resultArray.buffer);
4557   });
4558 };
4559 
4560 /**
4561  * Encode as Blob
4562  */
4563 
4564 exports.encodePayloadAsBlob = function(packets, callback) {
4565   function encodeOne(packet, doneCallback) {
4566     exports.encodePacket(packet, true, true, function(encoded) {
4567       var binaryIdentifier = new Uint8Array(1);
4568       binaryIdentifier[0] = 1;
4569       if (typeof encoded === 'string') {
4570         var view = new Uint8Array(encoded.length);
4571         for (var i = 0; i < encoded.length; i++) {
4572           view[i] = encoded.charCodeAt(i);
4573         }
4574         encoded = view.buffer;
4575         binaryIdentifier[0] = 0;
4576       }
4577 
4578       var len = (encoded instanceof ArrayBuffer)
4579         ? encoded.byteLength
4580         : encoded.size;
4581 
4582       var lenStr = len.toString();
4583       var lengthAry = new Uint8Array(lenStr.length + 1);
4584       for (var i = 0; i < lenStr.length; i++) {
4585         lengthAry[i] = parseInt(lenStr[i]);
4586       }
4587       lengthAry[lenStr.length] = 255;
4588 
4589       if (Blob) {
4590         var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
4591         doneCallback(null, blob);
4592       }
4593     });
4594   }
4595 
4596   map(packets, encodeOne, function(err, results) {
4597     return callback(new Blob(results));
4598   });
4599 };
4600 
4601 /*
4602  * Decodes data when a payload is maybe expected. Strings are decoded by
4603  * interpreting each byte as a key code for entries marked to start with 0. See
4604  * description of encodePayloadAsBinary
4605  *
4606  * @param {ArrayBuffer} data, callback method
4607  * @api public
4608  */
4609 
4610 exports.decodePayloadAsBinary = function (data, binaryType, callback) {
4611   if (typeof binaryType === 'function') {
4612     callback = binaryType;
4613     binaryType = null;
4614   }
4615 
4616   var bufferTail = data;
4617   var buffers = [];
4618 
4619   var numberTooLong = false;
4620   while (bufferTail.byteLength > 0) {
4621     var tailArray = new Uint8Array(bufferTail);
4622     var isString = tailArray[0] === 0;
4623     var msgLength = '';
4624 
4625     for (var i = 1; ; i++) {
4626       if (tailArray[i] == 255) break;
4627 
4628       if (msgLength.length > 310) {
4629         numberTooLong = true;
4630         break;
4631       }
4632 
4633       msgLength += tailArray[i];
4634     }
4635 
4636     if(numberTooLong) return callback(err, 0, 1);
4637 
4638     bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
4639     msgLength = parseInt(msgLength);
4640 
4641     var msg = sliceBuffer(bufferTail, 0, msgLength);
4642     if (isString) {
4643       try {
4644         msg = String.fromCharCode.apply(null, new Uint8Array(msg));
4645       } catch (e) {
4646         // iPhone Safari doesn't let you apply to typed arrays
4647         var typed = new Uint8Array(msg);
4648         msg = '';
4649         for (var i = 0; i < typed.length; i++) {
4650           msg += String.fromCharCode(typed[i]);
4651         }
4652       }
4653     }
4654 
4655     buffers.push(msg);
4656     bufferTail = sliceBuffer(bufferTail, msgLength);
4657   }
4658 
4659   var total = buffers.length;
4660   buffers.forEach(function(buffer, i) {
4661     callback(exports.decodePacket(buffer, binaryType, true), i, total);
4662   });
4663 };
4664 
4665 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
4666 },{"./keys":26,"after":27,"arraybuffer.slice":28,"base64-arraybuffer":29,"blob":30,"has-binary":36,"utf8":31}],26:[function(_dereq_,module,exports){
4667 
4668 /**
4669  * Gets the keys for an object.
4670  *
4671  * @return {Array} keys
4672  * @api private
4673  */
4674 
4675 module.exports = Object.keys || function keys (obj){
4676   var arr = [];
4677   var has = Object.prototype.hasOwnProperty;
4678 
4679   for (var i in obj) {
4680     if (has.call(obj, i)) {
4681       arr.push(i);
4682     }
4683   }
4684   return arr;
4685 };
4686 
4687 },{}],27:[function(_dereq_,module,exports){
4688 module.exports = after
4689 
4690 function after(count, callback, err_cb) {
4691     var bail = false
4692     err_cb = err_cb || noop
4693     proxy.count = count
4694 
4695     return (count === 0) ? callback() : proxy
4696 
4697     function proxy(err, result) {
4698         if (proxy.count <= 0) {
4699             throw new Error('after called too many times')
4700         }
4701         --proxy.count
4702 
4703         // after first error, rest are passed to err_cb
4704         if (err) {
4705             bail = true
4706             callback(err)
4707             // future error callbacks will go to error handler
4708             callback = err_cb
4709         } else if (proxy.count === 0 && !bail) {
4710             callback(null, result)
4711         }
4712     }
4713 }
4714 
4715 function noop() {}
4716 
4717 },{}],28:[function(_dereq_,module,exports){
4718 /**
4719  * An abstraction for slicing an arraybuffer even when
4720  * ArrayBuffer.prototype.slice is not supported
4721  *
4722  * @api public
4723  */
4724 
4725 module.exports = function(arraybuffer, start, end) {
4726   var bytes = arraybuffer.byteLength;
4727   start = start || 0;
4728   end = end || bytes;
4729 
4730   if (arraybuffer.slice) { return arraybuffer.slice(start, end); }
4731 
4732   if (start < 0) { start += bytes; }
4733   if (end < 0) { end += bytes; }
4734   if (end > bytes) { end = bytes; }
4735 
4736   if (start >= bytes || start >= end || bytes === 0) {
4737     return new ArrayBuffer(0);
4738   }
4739 
4740   var abv = new Uint8Array(arraybuffer);
4741   var result = new Uint8Array(end - start);
4742   for (var i = start, ii = 0; i < end; i++, ii++) {
4743     result[ii] = abv[i];
4744   }
4745   return result.buffer;
4746 };
4747 
4748 },{}],29:[function(_dereq_,module,exports){
4749 /*
4750  * base64-arraybuffer
4751  * https://github.com/niklasvh/base64-arraybuffer
4752  *
4753  * Copyright (c) 2012 Niklas von Hertzen
4754  * Licensed under the MIT license.
4755  */
4756 (function(chars){
4757   "use strict";
4758 
4759   exports.encode = function(arraybuffer) {
4760     var bytes = new Uint8Array(arraybuffer),
4761     i, len = bytes.length, base64 = "";
4762 
4763     for (i = 0; i < len; i+=3) {
4764       base64 += chars[bytes[i] >> 2];
4765       base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
4766       base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
4767       base64 += chars[bytes[i + 2] & 63];
4768     }
4769 
4770     if ((len % 3) === 2) {
4771       base64 = base64.substring(0, base64.length - 1) + "=";
4772     } else if (len % 3 === 1) {
4773       base64 = base64.substring(0, base64.length - 2) + "==";
4774     }
4775 
4776     return base64;
4777   };
4778 
4779   exports.decode =  function(base64) {
4780     var bufferLength = base64.length * 0.75,
4781     len = base64.length, i, p = 0,
4782     encoded1, encoded2, encoded3, encoded4;
4783 
4784     if (base64[base64.length - 1] === "=") {
4785       bufferLength--;
4786       if (base64[base64.length - 2] === "=") {
4787         bufferLength--;
4788       }
4789     }
4790 
4791     var arraybuffer = new ArrayBuffer(bufferLength),
4792     bytes = new Uint8Array(arraybuffer);
4793 
4794     for (i = 0; i < len; i+=4) {
4795       encoded1 = chars.indexOf(base64[i]);
4796       encoded2 = chars.indexOf(base64[i+1]);
4797       encoded3 = chars.indexOf(base64[i+2]);
4798       encoded4 = chars.indexOf(base64[i+3]);
4799 
4800       bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
4801       bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
4802       bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
4803     }
4804 
4805     return arraybuffer;
4806   };
4807 })("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
4808 
4809 },{}],30:[function(_dereq_,module,exports){
4810 (function (global){
4811 /**
4812  * Create a blob builder even when vendor prefixes exist
4813  */
4814 
4815 var BlobBuilder = global.BlobBuilder
4816   || global.WebKitBlobBuilder
4817   || global.MSBlobBuilder
4818   || global.MozBlobBuilder;
4819 
4820 /**
4821  * Check if Blob constructor is supported
4822  */
4823 
4824 var blobSupported = (function() {
4825   try {
4826     var a = new Blob(['hi']);
4827     return a.size === 2;
4828   } catch(e) {
4829     return false;
4830   }
4831 })();
4832 
4833 /**
4834  * Check if Blob constructor supports ArrayBufferViews
4835  * Fails in Safari 6, so we need to map to ArrayBuffers there.
4836  */
4837 
4838 var blobSupportsArrayBufferView = blobSupported && (function() {
4839   try {
4840     var b = new Blob([new Uint8Array([1,2])]);
4841     return b.size === 2;
4842   } catch(e) {
4843     return false;
4844   }
4845 })();
4846 
4847 /**
4848  * Check if BlobBuilder is supported
4849  */
4850 
4851 var blobBuilderSupported = BlobBuilder
4852   && BlobBuilder.prototype.append
4853   && BlobBuilder.prototype.getBlob;
4854 
4855 /**
4856  * Helper function that maps ArrayBufferViews to ArrayBuffers
4857  * Used by BlobBuilder constructor and old browsers that didn't
4858  * support it in the Blob constructor.
4859  */
4860 
4861 function mapArrayBufferViews(ary) {
4862   for (var i = 0; i < ary.length; i++) {
4863     var chunk = ary[i];
4864     if (chunk.buffer instanceof ArrayBuffer) {
4865       var buf = chunk.buffer;
4866 
4867       // if this is a subarray, make a copy so we only
4868       // include the subarray region from the underlying buffer
4869       if (chunk.byteLength !== buf.byteLength) {
4870         var copy = new Uint8Array(chunk.byteLength);
4871         copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
4872         buf = copy.buffer;
4873       }
4874 
4875       ary[i] = buf;
4876     }
4877   }
4878 }
4879 
4880 function BlobBuilderConstructor(ary, options) {
4881   options = options || {};
4882 
4883   var bb = new BlobBuilder();
4884   mapArrayBufferViews(ary);
4885 
4886   for (var i = 0; i < ary.length; i++) {
4887     bb.append(ary[i]);
4888   }
4889 
4890   return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
4891 };
4892 
4893 function BlobConstructor(ary, options) {
4894   mapArrayBufferViews(ary);
4895   return new Blob(ary, options || {});
4896 };
4897 
4898 module.exports = (function() {
4899   if (blobSupported) {
4900     return blobSupportsArrayBufferView ? global.Blob : BlobConstructor;
4901   } else if (blobBuilderSupported) {
4902     return BlobBuilderConstructor;
4903   } else {
4904     return undefined;
4905   }
4906 })();
4907 
4908 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
4909 },{}],31:[function(_dereq_,module,exports){
4910 (function (global){
4911 /*! https://mths.be/utf8js v2.0.0 by @mathias */
4912 ;(function(root) {
4913 
4914  // Detect free variables `exports`
4915  var freeExports = typeof exports == 'object' && exports;
4916 
4917  // Detect free variable `module`
4918  var freeModule = typeof module == 'object' && module &&
4919   module.exports == freeExports && module;
4920 
4921  // Detect free variable `global`, from Node.js or Browserified code,
4922  // and use it as `root`
4923  var freeGlobal = typeof global == 'object' && global;
4924  if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
4925   root = freeGlobal;
4926  }
4927 
4928  /*--------------------------------------------------------------------------*/
4929 
4930  var stringFromCharCode = String.fromCharCode;
4931 
4932  // Taken from https://mths.be/punycode
4933  function ucs2decode(string) {
4934   var output = [];
4935   var counter = 0;
4936   var length = string.length;
4937   var value;
4938   var extra;
4939   while (counter < length) {
4940    value = string.charCodeAt(counter++);
4941    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
4942     // high surrogate, and there is a next character
4943     extra = string.charCodeAt(counter++);
4944     if ((extra & 0xFC00) == 0xDC00) { // low surrogate
4945      output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
4946     } else {
4947      // unmatched surrogate; only append this code unit, in case the next
4948      // code unit is the high surrogate of a surrogate pair
4949      output.push(value);
4950      counter--;
4951     }
4952    } else {
4953     output.push(value);
4954    }
4955   }
4956   return output;
4957  }
4958 
4959  // Taken from https://mths.be/punycode
4960  function ucs2encode(array) {
4961   var length = array.length;
4962   var index = -1;
4963   var value;
4964   var output = '';
4965   while (++index < length) {
4966    value = array[index];
4967    if (value > 0xFFFF) {
4968     value -= 0x10000;
4969     output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
4970     value = 0xDC00 | value & 0x3FF;
4971    }
4972    output += stringFromCharCode(value);
4973   }
4974   return output;
4975  }
4976 
4977  function checkScalarValue(codePoint) {
4978   if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
4979    throw Error(
4980     'Lone surrogate U+' + codePoint.toString(16).toUpperCase() +
4981     ' is not a scalar value'
4982    );
4983   }
4984  }
4985  /*--------------------------------------------------------------------------*/
4986 
4987  function createByte(codePoint, shift) {
4988   return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
4989  }
4990 
4991  function encodeCodePoint(codePoint) {
4992   if ((codePoint & 0xFFFFFF80) == 0) { // 1-byte sequence
4993    return stringFromCharCode(codePoint);
4994   }
4995   var symbol = '';
4996   if ((codePoint & 0xFFFFF800) == 0) { // 2-byte sequence
4997    symbol = stringFromCharCode(((codePoint >> 6) & 0x1F) | 0xC0);
4998   }
4999   else if ((codePoint & 0xFFFF0000) == 0) { // 3-byte sequence
5000    checkScalarValue(codePoint);
5001    symbol = stringFromCharCode(((codePoint >> 12) & 0x0F) | 0xE0);
5002    symbol += createByte(codePoint, 6);
5003   }
5004   else if ((codePoint & 0xFFE00000) == 0) { // 4-byte sequence
5005    symbol = stringFromCharCode(((codePoint >> 18) & 0x07) | 0xF0);
5006    symbol += createByte(codePoint, 12);
5007    symbol += createByte(codePoint, 6);
5008   }
5009   symbol += stringFromCharCode((codePoint & 0x3F) | 0x80);
5010   return symbol;
5011  }
5012 
5013  function utf8encode(string) {
5014   var codePoints = ucs2decode(string);
5015   var length = codePoints.length;
5016   var index = -1;
5017   var codePoint;
5018   var byteString = '';
5019   while (++index < length) {
5020    codePoint = codePoints[index];
5021    byteString += encodeCodePoint(codePoint);
5022   }
5023   return byteString;
5024  }
5025 
5026  /*--------------------------------------------------------------------------*/
5027 
5028  function readContinuationByte() {
5029   if (byteIndex >= byteCount) {
5030    throw Error('Invalid byte index');
5031   }
5032 
5033   var continuationByte = byteArray[byteIndex] & 0xFF;
5034   byteIndex++;
5035 
5036   if ((continuationByte & 0xC0) == 0x80) {
5037    return continuationByte & 0x3F;
5038   }
5039 
5040   // If we end up here, it’s not a continuation byte
5041   throw Error('Invalid continuation byte');
5042  }
5043 
5044  function decodeSymbol() {
5045   var byte1;
5046   var byte2;
5047   var byte3;
5048   var byte4;
5049   var codePoint;
5050 
5051   if (byteIndex > byteCount) {
5052    throw Error('Invalid byte index');
5053   }
5054 
5055   if (byteIndex == byteCount) {
5056    return false;
5057   }
5058 
5059   // Read first byte
5060   byte1 = byteArray[byteIndex] & 0xFF;
5061   byteIndex++;
5062 
5063   // 1-byte sequence (no continuation bytes)
5064   if ((byte1 & 0x80) == 0) {
5065    return byte1;
5066   }
5067 
5068   // 2-byte sequence
5069   if ((byte1 & 0xE0) == 0xC0) {
5070    var byte2 = readContinuationByte();
5071    codePoint = ((byte1 & 0x1F) << 6) | byte2;
5072    if (codePoint >= 0x80) {
5073     return codePoint;
5074    } else {
5075     throw Error('Invalid continuation byte');
5076    }
5077   }
5078 
5079   // 3-byte sequence (may include unpaired surrogates)
5080   if ((byte1 & 0xF0) == 0xE0) {
5081    byte2 = readContinuationByte();
5082    byte3 = readContinuationByte();
5083    codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
5084    if (codePoint >= 0x0800) {
5085     checkScalarValue(codePoint);
5086     return codePoint;
5087    } else {
5088     throw Error('Invalid continuation byte');
5089    }
5090   }
5091 
5092   // 4-byte sequence
5093   if ((byte1 & 0xF8) == 0xF0) {
5094    byte2 = readContinuationByte();
5095    byte3 = readContinuationByte();
5096    byte4 = readContinuationByte();
5097    codePoint = ((byte1 & 0x0F) << 0x12) | (byte2 << 0x0C) |
5098     (byte3 << 0x06) | byte4;
5099    if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
5100     return codePoint;
5101    }
5102   }
5103 
5104   throw Error('Invalid UTF-8 detected');
5105  }
5106 
5107  var byteArray;
5108  var byteCount;
5109  var byteIndex;
5110  function utf8decode(byteString) {
5111   byteArray = ucs2decode(byteString);
5112   byteCount = byteArray.length;
5113   byteIndex = 0;
5114   var codePoints = [];
5115   var tmp;
5116   while ((tmp = decodeSymbol()) !== false) {
5117    codePoints.push(tmp);
5118   }
5119   return ucs2encode(codePoints);
5120  }
5121 
5122  /*--------------------------------------------------------------------------*/
5123 
5124  var utf8 = {
5125   'version': '2.0.0',
5126   'encode': utf8encode,
5127   'decode': utf8decode
5128  };
5129 
5130  // Some AMD build optimizers, like r.js, check for specific condition patterns
5131  // like the following:
5132  if (
5133   typeof define == 'function' &&
5134   typeof define.amd == 'object' &&
5135   define.amd
5136  ) {
5137   define(function() {
5138    return utf8;
5139   });
5140  }  else if (freeExports && !freeExports.nodeType) {
5141   if (freeModule) { // in Node.js or RingoJS v0.8.0+
5142    freeModule.exports = utf8;
5143   } else { // in Narwhal or RingoJS v0.7.0-
5144    var object = {};
5145    var hasOwnProperty = object.hasOwnProperty;
5146    for (var key in utf8) {
5147     hasOwnProperty.call(utf8, key) && (freeExports[key] = utf8[key]);
5148    }
5149   }
5150  } else { // in Rhino or a web browser
5151   root.utf8 = utf8;
5152  }
5153 
5154 }(this));
5155 
5156 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
5157 },{}],32:[function(_dereq_,module,exports){
5158 (function (global){
5159 /**
5160  * JSON parse.
5161  *
5162  * @see Based on jQuery#parseJSON (MIT) and JSON2
5163  * @api private
5164  */
5165 
5166 var rvalidchars = /^[],:{}s]*$/;
5167 var rvalidescape = /\(?:["\/bfnrt]|u[0-9a-fA-F]{4})/g;
5168 var rvalidtokens = /"[^"\

]*"|true|false|null|-?d+(?:.d*)?(?:[eE][+-]?d+)?/g;
5169 var rvalidbraces = /(?:^|:|,)(?:s*[)+/g;
5170 var rtrimLeft = /^s+/;
5171 var rtrimRight = /s+$/;
5172 
5173 module.exports = function parsejson(data) {
5174   if ('string' != typeof data || !data) {
5175     return null;
5176   }
5177 
5178   data = data.replace(rtrimLeft, '').replace(rtrimRight, '');
5179 
5180   // Attempt to parse using the native JSON parser first
5181   if (global.JSON && JSON.parse) {
5182     return JSON.parse(data);
5183   }
5184 
5185   if (rvalidchars.test(data.replace(rvalidescape, '@')
5186       .replace(rvalidtokens, ']')
5187       .replace(rvalidbraces, ''))) {
5188     return (new Function('return ' + data))();
5189   }
5190 };
5191 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
5192 },{}],33:[function(_dereq_,module,exports){
5193 /**
5194  * Compiles a querystring
5195  * Returns string representation of the object
5196  *
5197  * @param {Object}
5198  * @api private
5199  */
5200 
5201 exports.encode = function (obj) {
5202   var str = '';
5203 
5204   for (var i in obj) {
5205     if (obj.hasOwnProperty(i)) {
5206       if (str.length) str += '&';
5207       str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
5208     }
5209   }
5210 
5211   return str;
5212 };
5213 
5214 /**
5215  * Parses a simple querystring into an object
5216  *
5217  * @param {String} qs
5218  * @api private
5219  */
5220 
5221 exports.decode = function(qs){
5222   var qry = {};
5223   var pairs = qs.split('&');
5224   for (var i = 0, l = pairs.length; i < l; i++) {
5225     var pair = pairs[i].split('=');
5226     qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
5227   }
5228   return qry;
5229 };
5230 
5231 },{}],34:[function(_dereq_,module,exports){
5232 /**
5233  * Parses an URI
5234  *
5235  * @author Steven Levithan <stevenlevithan.com> (MIT license)
5236  * @api private
5237  */
5238 
5239 var re = /^(?:(?![^:@]+:[^:@/]*@)(http|https|ws|wss)://)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:/?#]*)(?::(d*))?)(((/(?:[^?#](?![^?#/]*.[^?#/.]+(?:[?#]|$)))*/?)?([^?#/]*))(?:?([^#]*))?(?:#(.*))?)/;
5240 
5241 var parts = [
5242     'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
5243 ];
5244 
5245 module.exports = function parseuri(str) {
5246     var src = str,
5247         b = str.indexOf('['),
5248         e = str.indexOf(']');
5249 
5250     if (b != -1 && e != -1) {
5251         str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
5252     }
5253 
5254     var m = re.exec(str || ''),
5255         uri = {},
5256         i = 14;
5257 
5258     while (i--) {
5259         uri[parts[i]] = m[i] || '';
5260     }
5261 
5262     if (b != -1 && e != -1) {
5263         uri.source = src;
5264         uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
5265         uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
5266         uri.ipv6uri = true;
5267     }
5268 
5269     return uri;
5270 };
5271 
5272 },{}],35:[function(_dereq_,module,exports){
5273 
5274 /**
5275  * Module dependencies.
5276  */
5277 
5278 var global = (function() { return this; })();
5279 
5280 /**
5281  * WebSocket constructor.
5282  */
5283 
5284 var WebSocket = global.WebSocket || global.MozWebSocket;
5285 
5286 /**
5287  * Module exports.
5288  */
5289 
5290 module.exports = WebSocket ? ws : null;
5291 
5292 /**
5293  * WebSocket constructor.
5294  *
5295  * The third `opts` options object gets ignored in web browsers, since it's
5296  * non-standard, and throws a TypeError if passed to the constructor.
5297  * See: https://github.com/einaros/ws/issues/227
5298  *
5299  * @param {String} uri
5300  * @param {Array} protocols (optional)
5301  * @param {Object) opts (optional)
5302  * @api public
5303  */
5304 
5305 function ws(uri, protocols, opts) {
5306   var instance;
5307   if (protocols) {
5308     instance = new WebSocket(uri, protocols);
5309   } else {
5310     instance = new WebSocket(uri);
5311   }
5312   return instance;
5313 }
5314 
5315 if (WebSocket) ws.prototype = WebSocket.prototype;
5316 
5317 },{}],36:[function(_dereq_,module,exports){
5318 (function (global){
5319 
5320 /*
5321  * Module requirements.
5322  */
5323 
5324 var isArray = _dereq_('isarray');
5325 
5326 /**
5327  * Module exports.
5328  */
5329 
5330 module.exports = hasBinary;
5331 
5332 /**
5333  * Checks for binary data.
5334  *
5335  * Right now only Buffer and ArrayBuffer are supported..
5336  *
5337  * @param {Object} anything
5338  * @api public
5339  */
5340 
5341 function hasBinary(data) {
5342 
5343   function _hasBinary(obj) {
5344     if (!obj) return false;
5345 
5346     if ( (global.Buffer && global.Buffer.isBuffer(obj)) ||
5347          (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
5348          (global.Blob && obj instanceof Blob) ||
5349          (global.File && obj instanceof File)
5350         ) {
5351       return true;
5352     }
5353 
5354     if (isArray(obj)) {
5355       for (var i = 0; i < obj.length; i++) {
5356           if (_hasBinary(obj[i])) {
5357               return true;
5358           }
5359       }
5360     } else if (obj && 'object' == typeof obj) {
5361       if (obj.toJSON) {
5362         obj = obj.toJSON();
5363       }
5364 
5365       for (var key in obj) {
5366         if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
5367           return true;
5368         }
5369       }
5370     }
5371 
5372     return false;
5373   }
5374 
5375   return _hasBinary(data);
5376 }
5377 
5378 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
5379 },{"isarray":37}],37:[function(_dereq_,module,exports){
5380 module.exports = Array.isArray || function (arr) {
5381   return Object.prototype.toString.call(arr) == '[object Array]';
5382 };
5383 
5384 },{}],38:[function(_dereq_,module,exports){
5385 
5386 /**
5387  * Module dependencies.
5388  */
5389 
5390 var global = _dereq_('global');
5391 
5392 /**
5393  * Module exports.
5394  *
5395  * Logic borrowed from Modernizr:
5396  *
5397  *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
5398  */
5399 
5400 try {
5401   module.exports = 'XMLHttpRequest' in global &&
5402     'withCredentials' in new global.XMLHttpRequest();
5403 } catch (err) {
5404   // if XMLHttp support is disabled in IE then it will throw
5405   // when trying to create
5406   module.exports = false;
5407 }
5408 
5409 },{"global":39}],39:[function(_dereq_,module,exports){
5410 
5411 /**
5412  * Returns `this`. Execute this without a "context" (i.e. without it being
5413  * attached to an object of the left-hand side), and `this` points to the
5414  * "global" scope of the current JS execution.
5415  */
5416 
5417 module.exports = (function () { return this; })();
5418 
5419 },{}],40:[function(_dereq_,module,exports){
5420 
5421 var indexOf = [].indexOf;
5422 
5423 module.exports = function(arr, obj){
5424   if (indexOf) return arr.indexOf(obj);
5425   for (var i = 0; i < arr.length; ++i) {
5426     if (arr[i] === obj) return i;
5427   }
5428   return -1;
5429 };
5430 },{}],41:[function(_dereq_,module,exports){
5431 
5432 /**
5433  * HOP ref.
5434  */
5435 
5436 var has = Object.prototype.hasOwnProperty;
5437 
5438 /**
5439  * Return own keys in `obj`.
5440  *
5441  * @param {Object} obj
5442  * @return {Array}
5443  * @api public
5444  */
5445 
5446 exports.keys = Object.keys || function(obj){
5447   var keys = [];
5448   for (var key in obj) {
5449     if (has.call(obj, key)) {
5450       keys.push(key);
5451     }
5452   }
5453   return keys;
5454 };
5455 
5456 /**
5457  * Return own values in `obj`.
5458  *
5459  * @param {Object} obj
5460  * @return {Array}
5461  * @api public
5462  */
5463 
5464 exports.values = function(obj){
5465   var vals = [];
5466   for (var key in obj) {
5467     if (has.call(obj, key)) {
5468       vals.push(obj[key]);
5469     }
5470   }
5471   return vals;
5472 };
5473 
5474 /**
5475  * Merge `b` into `a`.
5476  *
5477  * @param {Object} a
5478  * @param {Object} b
5479  * @return {Object} a
5480  * @api public
5481  */
5482 
5483 exports.merge = function(a, b){
5484   for (var key in b) {
5485     if (has.call(b, key)) {
5486       a[key] = b[key];
5487     }
5488   }
5489   return a;
5490 };
5491 
5492 /**
5493  * Return length of `obj`.
5494  *
5495  * @param {Object} obj
5496  * @return {Number}
5497  * @api public
5498  */
5499 
5500 exports.length = function(obj){
5501   return exports.keys(obj).length;
5502 };
5503 
5504 /**
5505  * Check if `obj` is empty.
5506  *
5507  * @param {Object} obj
5508  * @return {Boolean}
5509  * @api public
5510  */
5511 
5512 exports.isEmpty = function(obj){
5513   return 0 == exports.length(obj);
5514 };
5515 },{}],42:[function(_dereq_,module,exports){
5516 /**
5517  * Parses an URI
5518  *
5519  * @author Steven Levithan <stevenlevithan.com> (MIT license)
5520  * @api private
5521  */
5522 
5523 var re = /^(?:(?![^:@]+:[^:@/]*@)(http|https|ws|wss)://)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:/?#]*)(?::(d*))?)(((/(?:[^?#](?![^?#/]*.[^?#/.]+(?:[?#]|$)))*/?)?([^?#/]*))(?:?([^#]*))?(?:#(.*))?)/;
5524 
5525 var parts = [
5526     'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host'
5527   , 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
5528 ];
5529 
5530 module.exports = function parseuri(str) {
5531   var m = re.exec(str || '')
5532     , uri = {}
5533     , i = 14;
5534 
5535   while (i--) {
5536     uri[parts[i]] = m[i] || '';
5537   }
5538 
5539   return uri;
5540 };
5541 
5542 },{}],43:[function(_dereq_,module,exports){
5543 (function (global){
5544 /*global Blob,File*/
5545 
5546 /**
5547  * Module requirements
5548  */
5549 
5550 var isArray = _dereq_('isarray');
5551 var isBuf = _dereq_('./is-buffer');
5552 
5553 /**
5554  * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
5555  * Anything with blobs or files should be fed through removeBlobs before coming
5556  * here.
5557  *
5558  * @param {Object} packet - socket.io event packet
5559  * @return {Object} with deconstructed packet and list of buffers
5560  * @api public
5561  */
5562 
5563 exports.deconstructPacket = function(packet){
5564   var buffers = [];
5565   var packetData = packet.data;
5566 
5567   function _deconstructPacket(data) {
5568     if (!data) return data;
5569 
5570     if (isBuf(data)) {
5571       var placeholder = { _placeholder: true, num: buffers.length };
5572       buffers.push(data);
5573       return placeholder;
5574     } else if (isArray(data)) {
5575       var newData = new Array(data.length);
5576       for (var i = 0; i < data.length; i++) {
5577         newData[i] = _deconstructPacket(data[i]);
5578       }
5579       return newData;
5580     } else if ('object' == typeof data && !(data instanceof Date)) {
5581       var newData = {};
5582       for (var key in data) {
5583         newData[key] = _deconstructPacket(data[key]);
5584       }
5585       return newData;
5586     }
5587     return data;
5588   }
5589 
5590   var pack = packet;
5591   pack.data = _deconstructPacket(packetData);
5592   pack.attachments = buffers.length; // number of binary 'attachments'
5593   return {packet: pack, buffers: buffers};
5594 };
5595 
5596 /**
5597  * Reconstructs a binary packet from its placeholder packet and buffers
5598  *
5599  * @param {Object} packet - event packet with placeholders
5600  * @param {Array} buffers - binary buffers to put in placeholder positions
5601  * @return {Object} reconstructed packet
5602  * @api public
5603  */
5604 
5605 exports.reconstructPacket = function(packet, buffers) {
5606   var curPlaceHolder = 0;
5607 
5608   function _reconstructPacket(data) {
5609     if (data && data._placeholder) {
5610       var buf = buffers[data.num]; // appropriate buffer (should be natural order anyway)
5611       return buf;
5612     } else if (isArray(data)) {
5613       for (var i = 0; i < data.length; i++) {
5614         data[i] = _reconstructPacket(data[i]);
5615       }
5616       return data;
5617     } else if (data && 'object' == typeof data) {
5618       for (var key in data) {
5619         data[key] = _reconstructPacket(data[key]);
5620       }
5621       return data;
5622     }
5623     return data;
5624   }
5625 
5626   packet.data = _reconstructPacket(packet.data);
5627   packet.attachments = undefined; // no longer useful
5628   return packet;
5629 };
5630 
5631 /**
5632  * Asynchronously removes Blobs or Files from data via
5633  * FileReader's readAsArrayBuffer method. Used before encoding
5634  * data as msgpack. Calls callback with the blobless data.
5635  *
5636  * @param {Object} data
5637  * @param {Function} callback
5638  * @api private
5639  */
5640 
5641 exports.removeBlobs = function(data, callback) {
5642   function _removeBlobs(obj, curKey, containingObject) {
5643     if (!obj) return obj;
5644 
5645     // convert any blob
5646     if ((global.Blob && obj instanceof Blob) ||
5647         (global.File && obj instanceof File)) {
5648       pendingBlobs++;
5649 
5650       // async filereader
5651       var fileReader = new FileReader();
5652       fileReader.onload = function() { // this.result == arraybuffer
5653         if (containingObject) {
5654           containingObject[curKey] = this.result;
5655         }
5656         else {
5657           bloblessData = this.result;
5658         }
5659 
5660         // if nothing pending its callback time
5661         if(! --pendingBlobs) {
5662           callback(bloblessData);
5663         }
5664       };
5665 
5666       fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
5667     } else if (isArray(obj)) { // handle array
5668       for (var i = 0; i < obj.length; i++) {
5669         _removeBlobs(obj[i], i, obj);
5670       }
5671     } else if (obj && 'object' == typeof obj && !isBuf(obj)) { // and object
5672       for (var key in obj) {
5673         _removeBlobs(obj[key], key, obj);
5674       }
5675     }
5676   }
5677 
5678   var pendingBlobs = 0;
5679   var bloblessData = data;
5680   _removeBlobs(bloblessData);
5681   if (!pendingBlobs) {
5682     callback(bloblessData);
5683   }
5684 };
5685 
5686 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
5687 },{"./is-buffer":45,"isarray":46}],44:[function(_dereq_,module,exports){
5688 
5689 /**
5690  * Module dependencies.
5691  */
5692 
5693 var debug = _dereq_('debug')('socket.io-parser');
5694 var json = _dereq_('json3');
5695 var isArray = _dereq_('isarray');
5696 var Emitter = _dereq_('component-emitter');
5697 var binary = _dereq_('./binary');
5698 var isBuf = _dereq_('./is-buffer');
5699 
5700 /**
5701  * Protocol version.
5702  *
5703  * @api public
5704  */
5705 
5706 exports.protocol = 4;
5707 
5708 /**
5709  * Packet types.
5710  *
5711  * @api public
5712  */
5713 
5714 exports.types = [
5715   'CONNECT',
5716   'DISCONNECT',
5717   'EVENT',
5718   'BINARY_EVENT',
5719   'ACK',
5720   'BINARY_ACK',
5721   'ERROR'
5722 ];
5723 
5724 /**
5725  * Packet type `connect`.
5726  *
5727  * @api public
5728  */
5729 
5730 exports.CONNECT = 0;
5731 
5732 /**
5733  * Packet type `disconnect`.
5734  *
5735  * @api public
5736  */
5737 
5738 exports.DISCONNECT = 1;
5739 
5740 /**
5741  * Packet type `event`.
5742  *
5743  * @api public
5744  */
5745 
5746 exports.EVENT = 2;
5747 
5748 /**
5749  * Packet type `ack`.
5750  *
5751  * @api public
5752  */
5753 
5754 exports.ACK = 3;
5755 
5756 /**
5757  * Packet type `error`.
5758  *
5759  * @api public
5760  */
5761 
5762 exports.ERROR = 4;
5763 
5764 /**
5765  * Packet type 'binary event'
5766  *
5767  * @api public
5768  */
5769 
5770 exports.BINARY_EVENT = 5;
5771 
5772 /**
5773  * Packet type `binary ack`. For acks with binary arguments.
5774  *
5775  * @api public
5776  */
5777 
5778 exports.BINARY_ACK = 6;
5779 
5780 /**
5781  * Encoder constructor.
5782  *
5783  * @api public
5784  */
5785 
5786 exports.Encoder = Encoder;
5787 
5788 /**
5789  * Decoder constructor.
5790  *
5791  * @api public
5792  */
5793 
5794 exports.Decoder = Decoder;
5795 
5796 /**
5797  * A socket.io Encoder instance
5798  *
5799  * @api public
5800  */
5801 
5802 function Encoder() {}
5803 
5804 /**
5805  * Encode a packet as a single string if non-binary, or as a
5806  * buffer sequence, depending on packet type.
5807  *
5808  * @param {Object} obj - packet object
5809  * @param {Function} callback - function to handle encodings (likely engine.write)
5810  * @return Calls callback with Array of encodings
5811  * @api public
5812  */
5813 
5814 Encoder.prototype.encode = function(obj, callback){
5815   debug('encoding packet %j', obj);
5816 
5817   if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
5818     encodeAsBinary(obj, callback);
5819   }
5820   else {
5821     var encoding = encodeAsString(obj);
5822     callback([encoding]);
5823   }
5824 };
5825 
5826 /**
5827  * Encode packet as string.
5828  *
5829  * @param {Object} packet
5830  * @return {String} encoded
5831  * @api private
5832  */
5833 
5834 function encodeAsString(obj) {
5835   var str = '';
5836   var nsp = false;
5837 
5838   // first is type
5839   str += obj.type;
5840 
5841   // attachments if we have them
5842   if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
5843     str += obj.attachments;
5844     str += '-';
5845   }
5846 
5847   // if we have a namespace other than `/`
5848   // we append it followed by a comma `,`
5849   if (obj.nsp && '/' != obj.nsp) {
5850     nsp = true;
5851     str += obj.nsp;
5852   }
5853 
5854   // immediately followed by the id
5855   if (null != obj.id) {
5856     if (nsp) {
5857       str += ',';
5858       nsp = false;
5859     }
5860     str += obj.id;
5861   }
5862 
5863   // json data
5864   if (null != obj.data) {
5865     if (nsp) str += ',';
5866     str += json.stringify(obj.data);
5867   }
5868 
5869   debug('encoded %j as %s', obj, str);
5870   return str;
5871 }
5872 
5873 /**
5874  * Encode packet as 'buffer sequence' by removing blobs, and
5875  * deconstructing packet into object with placeholders and
5876  * a list of buffers.
5877  *
5878  * @param {Object} packet
5879  * @return {Buffer} encoded
5880  * @api private
5881  */
5882 
5883 function encodeAsBinary(obj, callback) {
5884 
5885   function writeEncoding(bloblessData) {
5886     var deconstruction = binary.deconstructPacket(bloblessData);
5887     var pack = encodeAsString(deconstruction.packet);
5888     var buffers = deconstruction.buffers;
5889 
5890     buffers.unshift(pack); // add packet info to beginning of data list
5891     callback(buffers); // write all the buffers
5892   }
5893 
5894   binary.removeBlobs(obj, writeEncoding);
5895 }
5896 
5897 /**
5898  * A socket.io Decoder instance
5899  *
5900  * @return {Object} decoder
5901  * @api public
5902  */
5903 
5904 function Decoder() {
5905   this.reconstructor = null;
5906 }
5907 
5908 /**
5909  * Mix in `Emitter` with Decoder.
5910  */
5911 
5912 Emitter(Decoder.prototype);
5913 
5914 /**
5915  * Decodes an ecoded packet string into packet JSON.
5916  *
5917  * @param {String} obj - encoded packet
5918  * @return {Object} packet
5919  * @api public
5920  */
5921 
5922 Decoder.prototype.add = function(obj) {
5923   var packet;
5924   if ('string' == typeof obj) {
5925     packet = decodeString(obj);
5926     if (exports.BINARY_EVENT == packet.type || exports.BINARY_ACK == packet.type) { // binary packet's json
5927       this.reconstructor = new BinaryReconstructor(packet);
5928 
5929       // no attachments, labeled binary but no binary data to follow
5930       if (this.reconstructor.reconPack.attachments === 0) {
5931         this.emit('decoded', packet);
5932       }
5933     } else { // non-binary full packet
5934       this.emit('decoded', packet);
5935     }
5936   }
5937   else if (isBuf(obj) || obj.base64) { // raw binary data
5938     if (!this.reconstructor) {
5939       throw new Error('got binary data when not reconstructing a packet');
5940     } else {
5941       packet = this.reconstructor.takeBinaryData(obj);
5942       if (packet) { // received final buffer
5943         this.reconstructor = null;
5944         this.emit('decoded', packet);
5945       }
5946     }
5947   }
5948   else {
5949     throw new Error('Unknown type: ' + obj);
5950   }
5951 };
5952 
5953 /**
5954  * Decode a packet String (JSON data)
5955  *
5956  * @param {String} str
5957  * @return {Object} packet
5958  * @api private
5959  */
5960 
5961 function decodeString(str) {
5962   var p = {};
5963   var i = 0;
5964 
5965   // look up type
5966   p.type = Number(str.charAt(0));
5967   if (null == exports.types[p.type]) return error();
5968 
5969   // look up attachments if type binary
5970   if (exports.BINARY_EVENT == p.type || exports.BINARY_ACK == p.type) {
5971     var buf = '';
5972     while (str.charAt(++i) != '-') {
5973       buf += str.charAt(i);
5974       if (i == str.length) break;
5975     }
5976     if (buf != Number(buf) || str.charAt(i) != '-') {
5977       throw new Error('Illegal attachments');
5978     }
5979     p.attachments = Number(buf);
5980   }
5981 
5982   // look up namespace (if any)
5983   if ('/' == str.charAt(i + 1)) {
5984     p.nsp = '';
5985     while (++i) {
5986       var c = str.charAt(i);
5987       if (',' == c) break;
5988       p.nsp += c;
5989       if (i == str.length) break;
5990     }
5991   } else {
5992     p.nsp = '/';
5993   }
5994 
5995   // look up id
5996   var next = str.charAt(i + 1);
5997   if ('' !== next && Number(next) == next) {
5998     p.id = '';
5999     while (++i) {
6000       var c = str.charAt(i);
6001       if (null == c || Number(c) != c) {
6002         --i;
6003         break;
6004       }
6005       p.id += str.charAt(i);
6006       if (i == str.length) break;
6007     }
6008     p.id = Number(p.id);
6009   }
6010 
6011   // look up json data
6012   if (str.charAt(++i)) {
6013     try {
6014       p.data = json.parse(str.substr(i));
6015     } catch(e){
6016       return error();
6017     }
6018   }
6019 
6020   debug('decoded %s as %j', str, p);
6021   return p;
6022 }
6023 
6024 /**
6025  * Deallocates a parser's resources
6026  *
6027  * @api public
6028  */
6029 
6030 Decoder.prototype.destroy = function() {
6031   if (this.reconstructor) {
6032     this.reconstructor.finishedReconstruction();
6033   }
6034 };
6035 
6036 /**
6037  * A manager of a binary event's 'buffer sequence'. Should
6038  * be constructed whenever a packet of type BINARY_EVENT is
6039  * decoded.
6040  *
6041  * @param {Object} packet
6042  * @return {BinaryReconstructor} initialized reconstructor
6043  * @api private
6044  */
6045 
6046 function BinaryReconstructor(packet) {
6047   this.reconPack = packet;
6048   this.buffers = [];
6049 }
6050 
6051 /**
6052  * Method to be called when binary data received from connection
6053  * after a BINARY_EVENT packet.
6054  *
6055  * @param {Buffer | ArrayBuffer} binData - the raw binary data received
6056  * @return {null | Object} returns null if more binary data is expected or
6057  *   a reconstructed packet object if all buffers have been received.
6058  * @api private
6059  */
6060 
6061 BinaryReconstructor.prototype.takeBinaryData = function(binData) {
6062   this.buffers.push(binData);
6063   if (this.buffers.length == this.reconPack.attachments) { // done with buffer list
6064     var packet = binary.reconstructPacket(this.reconPack, this.buffers);
6065     this.finishedReconstruction();
6066     return packet;
6067   }
6068   return null;
6069 };
6070 
6071 /**
6072  * Cleans up binary packet reconstruction variables.
6073  *
6074  * @api private
6075  */
6076 
6077 BinaryReconstructor.prototype.finishedReconstruction = function() {
6078   this.reconPack = null;
6079   this.buffers = [];
6080 };
6081 
6082 function error(data){
6083   return {
6084     type: exports.ERROR,
6085     data: 'parser error'
6086   };
6087 }
6088 
6089 },{"./binary":43,"./is-buffer":45,"component-emitter":9,"debug":10,"isarray":46,"json3":47}],45:[function(_dereq_,module,exports){
6090 (function (global){
6091 
6092 module.exports = isBuf;
6093 
6094 /**
6095  * Returns true if obj is a buffer or an arraybuffer.
6096  *
6097  * @api private
6098  */
6099 
6100 function isBuf(obj) {
6101   return (global.Buffer && global.Buffer.isBuffer(obj)) ||
6102          (global.ArrayBuffer && obj instanceof ArrayBuffer);
6103 }
6104 
6105 }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
6106 },{}],46:[function(_dereq_,module,exports){
6107 module.exports=_dereq_(37)
6108 },{}],47:[function(_dereq_,module,exports){
6109 /*! JSON v3.2.6 | http://bestiejs.github.io/json3 | Copyright 2012-2013, Kit Cambridge | http://kit.mit-license.org */
6110 ;(function (window) {
6111   // Convenience aliases.
6112   var getClass = {}.toString, isProperty, forEach, undef;
6113 
6114   // Detect the `define` function exposed by asynchronous module loaders. The
6115   // strict `define` check is necessary for compatibility with `r.js`.
6116   var isLoader = typeof define === "function" && define.amd;
6117 
6118   // Detect native implementations.
6119   var nativeJSON = typeof JSON == "object" && JSON;
6120 
6121   // Set up the JSON 3 namespace, preferring the CommonJS `exports` object if
6122   // available.
6123   var JSON3 = typeof exports == "object" && exports && !exports.nodeType && exports;
6124 
6125   if (JSON3 && nativeJSON) {
6126     // Explicitly delegate to the native `stringify` and `parse`
6127     // implementations in CommonJS environments.
6128     JSON3.stringify = nativeJSON.stringify;
6129     JSON3.parse = nativeJSON.parse;
6130   } else {
6131     // Export for web browsers, JavaScript engines, and asynchronous module
6132     // loaders, using the global `JSON` object if available.
6133     JSON3 = window.JSON = nativeJSON || {};
6134   }
6135 
6136   // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
6137   var isExtended = new Date(-3509827334573292);
6138   try {
6139     // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
6140     // results for certain dates in Opera >= 10.53.
6141     isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
6142       // Safari < 2.0.2 stores the internal millisecond time value correctly,
6143       // but clips the values returned by the date methods to the range of
6144       // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
6145       isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
6146   } catch (exception) {}
6147 
6148   // Internal: Determines whether the native `JSON.stringify` and `parse`
6149   // implementations are spec-compliant. Based on work by Ken Snyder.
6150   function has(name) {
6151     if (has[name] !== undef) {
6152       // Return cached feature test result.
6153       return has[name];
6154     }
6155 
6156     var isSupported;
6157     if (name == "bug-string-char-index") {
6158       // IE <= 7 doesn't support accessing string characters using square
6159       // bracket notation. IE 8 only supports this for primitives.
6160       isSupported = "a"[0] != "a";
6161     } else if (name == "json") {
6162       // Indicates whether both `JSON.stringify` and `JSON.parse` are
6163       // supported.
6164       isSupported = has("json-stringify") && has("json-parse");
6165     } else {
6166       var value, serialized = '{"a":[1,true,false,null,"\u0000\b\n\f\r\t"]}';
6167       // Test `JSON.stringify`.
6168       if (name == "json-stringify") {
6169         var stringify = JSON3.stringify, stringifySupported = typeof stringify == "function" && isExtended;
6170         if (stringifySupported) {
6171           // A test function object with a custom `toJSON` method.
6172           (value = function () {
6173             return 1;
6174           }).toJSON = value;
6175           try {
6176             stringifySupported =
6177               // Firefox 3.1b1 and b2 serialize string, number, and boolean
6178               // primitives as object literals.
6179               stringify(0) === "0" &&
6180               // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
6181               // literals.
6182               stringify(new Number()) === "0" &&
6183               stringify(new String()) == '""' &&
6184               // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
6185               // does not define a canonical JSON representation (this applies to
6186               // objects with `toJSON` properties as well, *unless* they are nested
6187               // within an object or array).
6188               stringify(getClass) === undef &&
6189               // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
6190               // FF 3.1b3 pass this test.
6191               stringify(undef) === undef &&
6192               // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
6193               // respectively, if the value is omitted entirely.
6194               stringify() === undef &&
6195               // FF 3.1b1, 2 throw an error if the given value is not a number,
6196               // string, array, object, Boolean, or `null` literal. This applies to
6197               // objects with custom `toJSON` methods as well, unless they are nested
6198               // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
6199               // methods entirely.
6200               stringify(value) === "1" &&
6201               stringify([value]) == "[1]" &&
6202               // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
6203               // `"[null]"`.
6204               stringify([undef]) == "[null]" &&
6205               // YUI 3.0.0b1 fails to serialize `null` literals.
6206               stringify(null) == "null" &&
6207               // FF 3.1b1, 2 halts serialization if an array contains a function:
6208               // `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
6209               // elides non-JSON values from objects and arrays, unless they
6210               // define custom `toJSON` methods.
6211               stringify([undef, getClass, null]) == "[null,null,null]" &&
6212               // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
6213               // where character escape codes are expected (e.g., `` => `u0008`).
6214               stringify({ "a": [value, true, false, null, "x00
f
	"] }) == serialized &&
6215               // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
6216               stringify(null, value) === "1" &&
6217               stringify([1, 2], null, 1) == "[
 1,
 2
]" &&
6218               // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
6219               // serialize extended years.
6220               stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
6221               // The milliseconds are optional in ES 5, but required in 5.1.
6222               stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
6223               // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
6224               // four-digit years instead of six-digit years. Credits: @Yaffle.
6225               stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
6226               // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
6227               // values less than 1000. Credits: @Yaffle.
6228               stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
6229           } catch (exception) {
6230             stringifySupported = false;
6231           }
6232         }
6233         isSupported = stringifySupported;
6234       }
6235       // Test `JSON.parse`.
6236       if (name == "json-parse") {
6237         var parse = JSON3.parse;
6238         if (typeof parse == "function") {
6239           try {
6240             // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
6241             // Conforming implementations should also coerce the initial argument to
6242             // a string prior to parsing.
6243             if (parse("0") === 0 && !parse(false)) {
6244               // Simple parsing test.
6245               value = parse(serialized);
6246               var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
6247               if (parseSupported) {
6248                 try {
6249                   // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
6250                   parseSupported = !parse('"	"');
6251                 } catch (exception) {}
6252                 if (parseSupported) {
6253                   try {
6254                     // FF 4.0 and 4.0.1 allow leading `+` signs and leading
6255                     // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
6256                     // certain octal literals.
6257                     parseSupported = parse("01") !== 1;
6258                   } catch (exception) {}
6259                 }
6260                 if (parseSupported) {
6261                   try {
6262                     // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
6263                     // points. These environments, along with FF 3.1b1 and 2,
6264                     // also allow trailing commas in JSON objects and arrays.
6265                     parseSupported = parse("1.") !== 1;
6266                   } catch (exception) {}
6267                 }
6268               }
6269             }
6270           } catch (exception) {
6271             parseSupported = false;
6272           }
6273         }
6274         isSupported = parseSupported;
6275       }
6276     }
6277     return has[name] = !!isSupported;
6278   }
6279 
6280   if (!has("json")) {
6281     // Common `[[Class]]` name aliases.
6282     var functionClass = "[object Function]";
6283     var dateClass = "[object Date]";
6284     var numberClass = "[object Number]";
6285     var stringClass = "[object String]";
6286     var arrayClass = "[object Array]";
6287     var booleanClass = "[object Boolean]";
6288 
6289     // Detect incomplete support for accessing string characters by index.
6290     var charIndexBuggy = has("bug-string-char-index");
6291 
6292     // Define additional utility methods if the `Date` methods are buggy.
6293     if (!isExtended) {
6294       var floor = Math.floor;
6295       // A mapping between the months of the year and the number of days between
6296       // January 1st and the first of the respective month.
6297       var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
6298       // Internal: Calculates the number of days between the Unix epoch and the
6299       // first day of the given month.
6300       var getDay = function (year, month) {
6301         return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
6302       };
6303     }
6304 
6305     // Internal: Determines if a property is a direct property of the given
6306     // object. Delegates to the native `Object#hasOwnProperty` method.
6307     if (!(isProperty = {}.hasOwnProperty)) {
6308       isProperty = function (property) {
6309         var members = {}, constructor;
6310         if ((members.__proto__ = null, members.__proto__ = {
6311           // The *proto* property cannot be set multiple times in recent
6312           // versions of Firefox and SeaMonkey.
6313           "toString": 1
6314         }, members).toString != getClass) {
6315           // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
6316           // supports the mutable *proto* property.
6317           isProperty = function (property) {
6318             // Capture and break the object's prototype chain (see section 8.6.2
6319             // of the ES 5.1 spec). The parenthesized expression prevents an
6320             // unsafe transformation by the Closure Compiler.
6321             var original = this.__proto__, result = property in (this.__proto__ = null, this);
6322             // Restore the original prototype chain.
6323             this.__proto__ = original;
6324             return result;
6325           };
6326         } else {
6327           // Capture a reference to the top-level `Object` constructor.
6328           constructor = members.constructor;
6329           // Use the `constructor` property to simulate `Object#hasOwnProperty` in
6330           // other environments.
6331           isProperty = function (property) {
6332             var parent = (this.constructor || constructor).prototype;
6333             return property in this && !(property in parent && this[property] === parent[property]);
6334           };
6335         }
6336         members = null;
6337         return isProperty.call(this, property);
6338       };
6339     }
6340 
6341     // Internal: A set of primitive types used by `isHostType`.
6342     var PrimitiveTypes = {
6343       'boolean': 1,
6344       'number': 1,
6345       'string': 1,
6346       'undefined': 1
6347     };
6348 
6349     // Internal: Determines if the given object `property` value is a
6350     // non-primitive.
6351     var isHostType = function (object, property) {
6352       var type = typeof object[property];
6353       return type == 'object' ? !!object[property] : !PrimitiveTypes[type];
6354     };
6355 
6356     // Internal: Normalizes the `for...in` iteration algorithm across
6357     // environments. Each enumerated key is yielded to a `callback` function.
6358     forEach = function (object, callback) {
6359       var size = 0, Properties, members, property;
6360 
6361       // Tests for bugs in the current environment's `for...in` algorithm. The
6362       // `valueOf` property inherits the non-enumerable flag from
6363       // `Object.prototype` in older versions of IE, Netscape, and Mozilla.
6364       (Properties = function () {
6365         this.valueOf = 0;
6366       }).prototype.valueOf = 0;
6367 
6368       // Iterate over a new instance of the `Properties` class.
6369       members = new Properties();
6370       for (property in members) {
6371         // Ignore all properties inherited from `Object.prototype`.
6372         if (isProperty.call(members, property)) {
6373           size++;
6374         }
6375       }
6376       Properties = members = null;
6377 
6378       // Normalize the iteration algorithm.
6379       if (!size) {
6380         // A list of non-enumerable properties inherited from `Object.prototype`.
6381         members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
6382         // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
6383         // properties.
6384         forEach = function (object, callback) {
6385           var isFunction = getClass.call(object) == functionClass, property, length;
6386           var hasProperty = !isFunction && typeof object.constructor != 'function' && isHostType(object, 'hasOwnProperty') ? object.hasOwnProperty : isProperty;
6387           for (property in object) {
6388             // Gecko <= 1.0 enumerates the `prototype` property of functions under
6389             // certain conditions; IE does not.
6390             if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
6391               callback(property);
6392             }
6393           }
6394           // Manually invoke the callback for each non-enumerable property.
6395           for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
6396         };
6397       } else if (size == 2) {
6398         // Safari <= 2.0.4 enumerates shadowed properties twice.
6399         forEach = function (object, callback) {
6400           // Create a set of iterated properties.
6401           var members = {}, isFunction = getClass.call(object) == functionClass, property;
6402           for (property in object) {
6403             // Store each property name to prevent double enumeration. The
6404             // `prototype` property of functions is not enumerated due to cross-
6405             // environment inconsistencies.
6406             if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
6407               callback(property);
6408             }
6409           }
6410         };
6411       } else {
6412         // No bugs detected; use the standard `for...in` algorithm.
6413         forEach = function (object, callback) {
6414           var isFunction = getClass.call(object) == functionClass, property, isConstructor;
6415           for (property in object) {
6416             if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
6417               callback(property);
6418             }
6419           }
6420           // Manually invoke the callback for the `constructor` property due to
6421           // cross-environment inconsistencies.
6422           if (isConstructor || isProperty.call(object, (property = "constructor"))) {
6423             callback(property);
6424           }
6425         };
6426       }
6427       return forEach(object, callback);
6428     };
6429 
6430     // Public: Serializes a JavaScript `value` as a JSON string. The optional
6431     // `filter` argument may specify either a function that alters how object and
6432     // array members are serialized, or an array of strings and numbers that
6433     // indicates which properties should be serialized. The optional `width`
6434     // argument may be either a string or number that specifies the indentation
6435     // level of the output.
6436     if (!has("json-stringify")) {
6437       // Internal: A map of control characters and their escaped equivalents.
6438       var Escapes = {
6439         92: "\\",
6440         34: '\"',
6441         8: "\b",
6442         12: "\f",
6443         10: "\n",
6444         13: "\r",
6445         9: "\t"
6446       };
6447 
6448       // Internal: Converts `value` into a zero-padded string such that its
6449       // length is at least equal to `width`. The `width` must be <= 6.
6450       var leadingZeroes = "000000";
6451       var toPaddedString = function (width, value) {
6452         // The `|| 0` expression is necessary to work around a bug in
6453         // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
6454         return (leadingZeroes + (value || 0)).slice(-width);
6455       };
6456 
6457       // Internal: Double-quotes a string `value`, replacing all ASCII control
6458       // characters (characters with code unit values between 0 and 31) with
6459       // their escaped equivalents. This is an implementation of the
6460       // `Quote(value)` operation defined in ES 5.1 section 15.12.3.
6461       var unicodePrefix = "\u00";
6462       var quote = function (value) {
6463         var result = '"', index = 0, length = value.length, isLarge = length > 10 && charIndexBuggy, symbols;
6464         if (isLarge) {
6465           symbols = value.split("");
6466         }
6467         for (; index < length; index++) {
6468           var charCode = value.charCodeAt(index);
6469           // If the character is a control character, append its Unicode or
6470           // shorthand escape sequence; otherwise, append the character as-is.
6471           switch (charCode) {
6472             case 8: case 9: case 10: case 12: case 13: case 34: case 92:
6473               result += Escapes[charCode];
6474               break;
6475             default:
6476               if (charCode < 32) {
6477                 result += unicodePrefix + toPaddedString(2, charCode.toString(16));
6478                 break;
6479               }
6480               result += isLarge ? symbols[index] : charIndexBuggy ? value.charAt(index) : value[index];
6481           }
6482         }
6483         return result + '"';
6484       };
6485 
6486       // Internal: Recursively serializes an object. Implements the
6487       // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
6488       var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
6489         var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
6490         try {
6491           // Necessary for host object support.
6492           value = object[property];
6493         } catch (exception) {}
6494         if (typeof value == "object" && value) {
6495           className = getClass.call(value);
6496           if (className == dateClass && !isProperty.call(value, "toJSON")) {
6497             if (value > -1 / 0 && value < 1 / 0) {
6498               // Dates are serialized according to the `Date#toJSON` method
6499               // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
6500               // for the ISO 8601 date time string format.
6501               if (getDay) {
6502                 // Manually compute the year, month, date, hours, minutes,
6503                 // seconds, and milliseconds if the `getUTC*` methods are
6504                 // buggy. Adapted from @Yaffle's `date-shim` project.
6505                 date = floor(value / 864e5);
6506                 for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
6507                 for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
6508                 date = 1 + date - getDay(year, month);
6509                 // The `time` value specifies the time within the day (see ES
6510                 // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
6511                 // to compute `A modulo B`, as the `%` operator does not
6512                 // correspond to the `modulo` operation for negative numbers.
6513                 time = (value % 864e5 + 864e5) % 864e5;
6514                 // The hours, minutes, seconds, and milliseconds are obtained by
6515                 // decomposing the time within the day. See section 15.9.1.10.
6516                 hours = floor(time / 36e5) % 24;
6517                 minutes = floor(time / 6e4) % 60;
6518                 seconds = floor(time / 1e3) % 60;
6519                 milliseconds = time % 1e3;
6520               } else {
6521                 year = value.getUTCFullYear();
6522                 month = value.getUTCMonth();
6523                 date = value.getUTCDate();
6524                 hours = value.getUTCHours();
6525                 minutes = value.getUTCMinutes();
6526                 seconds = value.getUTCSeconds();
6527                 milliseconds = value.getUTCMilliseconds();
6528               }
6529               // Serialize extended years correctly.
6530               value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
6531                 "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
6532                 // Months, dates, hours, minutes, and seconds should have two
6533                 // digits; milliseconds should have three.
6534                 "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
6535                 // Milliseconds are optional in ES 5.0, but required in 5.1.
6536                 "." + toPaddedString(3, milliseconds) + "Z";
6537             } else {
6538               value = null;
6539             }
6540           } else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
6541             // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
6542             // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
6543             // ignores all `toJSON` methods on these objects unless they are
6544             // defined directly on an instance.
6545             value = value.toJSON(property);
6546           }
6547         }
6548         if (callback) {
6549           // If a replacement function was provided, call it to obtain the value
6550           // for serialization.
6551           value = callback.call(object, property, value);
6552         }
6553         if (value === null) {
6554           return "null";
6555         }
6556         className = getClass.call(value);
6557         if (className == booleanClass) {
6558           // Booleans are represented literally.
6559           return "" + value;
6560         } else if (className == numberClass) {
6561           // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
6562           // `"null"`.
6563           return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
6564         } else if (className == stringClass) {
6565           // Strings are double-quoted and escaped.
6566           return quote("" + value);
6567         }
6568         // Recursively serialize objects and arrays.
6569         if (typeof value == "object") {
6570           // Check for cyclic structures. This is a linear search; performance
6571           // is inversely proportional to the number of unique nested objects.
6572           for (length = stack.length; length--;) {
6573             if (stack[length] === value) {
6574               // Cyclic structures cannot be serialized by `JSON.stringify`.
6575               throw TypeError();
6576             }
6577           }
6578           // Add the object to the stack of traversed objects.
6579           stack.push(value);
6580           results = [];
6581           // Save the current indentation level and indent one additional level.
6582           prefix = indentation;
6583           indentation += whitespace;
6584           if (className == arrayClass) {
6585             // Recursively serialize array elements.
6586             for (index = 0, length = value.length; index < length; index++) {
6587               element = serialize(index, value, callback, properties, whitespace, indentation, stack);
6588               results.push(element === undef ? "null" : element);
6589             }
6590             result = results.length ? (whitespace ? "[
" + indentation + results.join(",
" + indentation) + "
" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
6591           } else {
6592             // Recursively serialize object members. Members are selected from
6593             // either a user-specified list of property names, or the object
6594             // itself.
6595             forEach(properties || value, function (property) {
6596               var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
6597               if (element !== undef) {
6598                 // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
6599                 // is not the empty string, let `member` {quote(property) + ":"}
6600                 // be the concatenation of `member` and the `space` character."
6601                 // The "`space` character" refers to the literal space
6602                 // character, not the `space` {width} argument provided to
6603                 // `JSON.stringify`.
6604                 results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
6605               }
6606             });
6607             result = results.length ? (whitespace ? "{
" + indentation + results.join(",
" + indentation) + "
" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
6608           }
6609           // Remove the object from the traversed object stack.
6610           stack.pop();
6611           return result;
6612         }
6613       };
6614 
6615       // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
6616       JSON3.stringify = function (source, filter, width) {
6617         var whitespace, callback, properties, className;
6618         if (typeof filter == "function" || typeof filter == "object" && filter) {
6619           if ((className = getClass.call(filter)) == functionClass) {
6620             callback = filter;
6621           } else if (className == arrayClass) {
6622             // Convert the property names array into a makeshift set.
6623             properties = {};
6624             for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
6625           }
6626         }
6627         if (width) {
6628           if ((className = getClass.call(width)) == numberClass) {
6629             // Convert the `width` to an integer and create a string containing
6630             // `width` number of space characters.
6631             if ((width -= width % 1) > 0) {
6632               for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
6633             }
6634           } else if (className == stringClass) {
6635             whitespace = width.length <= 10 ? width : width.slice(0, 10);
6636           }
6637         }
6638         // Opera <= 7.54u2 discards the values associated with empty string keys
6639         // (`""`) only if they are used directly within an object member list
6640         // (e.g., `!("" in { "": 1})`).
6641         return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
6642       };
6643     }
6644 
6645     // Public: Parses a JSON source string.
6646     if (!has("json-parse")) {
6647       var fromCharCode = String.fromCharCode;
6648 
6649       // Internal: A map of escaped control characters and their unescaped
6650       // equivalents.
6651       var Unescapes = {
6652         92: "\",
6653         34: '"',
6654         47: "/",
6655         98: "",
6656         116: "	",
6657         110: "
",
6658         102: "f",
6659         114: "
"
6660       };
6661 
6662       // Internal: Stores the parser state.
6663       var Index, Source;
6664 
6665       // Internal: Resets the parser state and throws a `SyntaxError`.
6666       var abort = function() {
6667         Index = Source = null;
6668         throw SyntaxError();
6669       };
6670 
6671       // Internal: Returns the next token, or `"$"` if the parser has reached
6672       // the end of the source string. A token may be a string, number, `null`
6673       // literal, or Boolean literal.
6674       var lex = function () {
6675         var source = Source, length = source.length, value, begin, position, isSigned, charCode;
6676         while (Index < length) {
6677           charCode = source.charCodeAt(Index);
6678           switch (charCode) {
6679             case 9: case 10: case 13: case 32:
6680               // Skip whitespace tokens, including tabs, carriage returns, line
6681               // feeds, and space characters.
6682               Index++;
6683               break;
6684             case 123: case 125: case 91: case 93: case 58: case 44:
6685               // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
6686               // the current position.
6687               value = charIndexBuggy ? source.charAt(Index) : source[Index];
6688               Index++;
6689               return value;
6690             case 34:
6691               // `"` delimits a JSON string; advance to the next character and
6692               // begin parsing the string. String tokens are prefixed with the
6693               // sentinel `@` character to distinguish them from punctuators and
6694               // end-of-string tokens.
6695               for (value = "@", Index++; Index < length;) {
6696                 charCode = source.charCodeAt(Index);
6697                 if (charCode < 32) {
6698                   // Unescaped ASCII control characters (those with a code unit
6699                   // less than the space character) are not permitted.
6700                   abort();
6701                 } else if (charCode == 92) {
6702                   // A reverse solidus (`\`) marks the beginning of an escaped
6703                   // control character (including `"`, `\`, and `/`) or Unicode
6704                   // escape sequence.
6705                   charCode = source.charCodeAt(++Index);
6706                   switch (charCode) {
6707                     case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
6708                       // Revive escaped control characters.
6709                       value += Unescapes[charCode];
6710                       Index++;
6711                       break;
6712                     case 117:
6713                       // `u` marks the beginning of a Unicode escape sequence.
6714                       // Advance to the first character and validate the
6715                       // four-digit code point.
6716                       begin = ++Index;
6717                       for (position = Index + 4; Index < position; Index++) {
6718                         charCode = source.charCodeAt(Index);
6719                         // A valid sequence comprises four hexdigits (case-
6720                         // insensitive) that form a single hexadecimal value.
6721                         if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
6722                           // Invalid Unicode escape sequence.
6723                           abort();
6724                         }
6725                       }
6726                       // Revive the escaped character.
6727                       value += fromCharCode("0x" + source.slice(begin, Index));
6728                       break;
6729                     default:
6730                       // Invalid escape sequence.
6731                       abort();
6732                   }
6733                 } else {
6734                   if (charCode == 34) {
6735                     // An unescaped double-quote character marks the end of the
6736                     // string.
6737                     break;
6738                   }
6739                   charCode = source.charCodeAt(Index);
6740                   begin = Index;
6741                   // Optimize for the common case where a string is valid.
6742                   while (charCode >= 32 && charCode != 92 && charCode != 34) {
6743                     charCode = source.charCodeAt(++Index);
6744                   }
6745                   // Append the string as-is.
6746                   value += source.slice(begin, Index);
6747                 }
6748               }
6749               if (source.charCodeAt(Index) == 34) {
6750                 // Advance to the next character and return the revived string.
6751                 Index++;
6752                 return value;
6753               }
6754               // Unterminated string.
6755               abort();
6756             default:
6757               // Parse numbers and literals.
6758               begin = Index;
6759               // Advance past the negative sign, if one is specified.
6760               if (charCode == 45) {
6761                 isSigned = true;
6762                 charCode = source.charCodeAt(++Index);
6763               }
6764               // Parse an integer or floating-point value.
6765               if (charCode >= 48 && charCode <= 57) {
6766                 // Leading zeroes are interpreted as octal literals.
6767                 if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
6768                   // Illegal octal literal.
6769                   abort();
6770                 }
6771                 isSigned = false;
6772                 // Parse the integer component.
6773                 for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
6774                 // Floats cannot contain a leading decimal point; however, this
6775                 // case is already accounted for by the parser.
6776                 if (source.charCodeAt(Index) == 46) {
6777                   position = ++Index;
6778                   // Parse the decimal component.
6779                   for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
6780                   if (position == Index) {
6781                     // Illegal trailing decimal.
6782                     abort();
6783                   }
6784                   Index = position;
6785                 }
6786                 // Parse exponents. The `e` denoting the exponent is
6787                 // case-insensitive.
6788                 charCode = source.charCodeAt(Index);
6789                 if (charCode == 101 || charCode == 69) {
6790                   charCode = source.charCodeAt(++Index);
6791                   // Skip past the sign following the exponent, if one is
6792                   // specified.
6793                   if (charCode == 43 || charCode == 45) {
6794                     Index++;
6795                   }
6796                   // Parse the exponential component.
6797                   for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
6798                   if (position == Index) {
6799                     // Illegal empty exponent.
6800                     abort();
6801                   }
6802                   Index = position;
6803                 }
6804                 // Coerce the parsed value to a JavaScript number.
6805                 return +source.slice(begin, Index);
6806               }
6807               // A negative sign may only precede numbers.
6808               if (isSigned) {
6809                 abort();
6810               }
6811               // `true`, `false`, and `null` literals.
6812               if (source.slice(Index, Index + 4) == "true") {
6813                 Index += 4;
6814                 return true;
6815               } else if (source.slice(Index, Index + 5) == "false") {
6816                 Index += 5;
6817                 return false;
6818               } else if (source.slice(Index, Index + 4) == "null") {
6819                 Index += 4;
6820                 return null;
6821               }
6822               // Unrecognized token.
6823               abort();
6824           }
6825         }
6826         // Return the sentinel `$` character if the parser has reached the end
6827         // of the source string.
6828         return "$";
6829       };
6830 
6831       // Internal: Parses a JSON `value` token.
6832       var get = function (value) {
6833         var results, hasMembers;
6834         if (value == "$") {
6835           // Unexpected end of input.
6836           abort();
6837         }
6838         if (typeof value == "string") {
6839           if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
6840             // Remove the sentinel `@` character.
6841             return value.slice(1);
6842           }
6843           // Parse object and array literals.
6844           if (value == "[") {
6845             // Parses a JSON array, returning a new JavaScript array.
6846             results = [];
6847             for (;; hasMembers || (hasMembers = true)) {
6848               value = lex();
6849               // A closing square bracket marks the end of the array literal.
6850               if (value == "]") {
6851                 break;
6852               }
6853               // If the array literal contains elements, the current token
6854               // should be a comma separating the previous element from the
6855               // next.
6856               if (hasMembers) {
6857                 if (value == ",") {
6858                   value = lex();
6859                   if (value == "]") {
6860                     // Unexpected trailing `,` in array literal.
6861                     abort();
6862                   }
6863                 } else {
6864                   // A `,` must separate each array element.
6865                   abort();
6866                 }
6867               }
6868               // Elisions and leading commas are not permitted.
6869               if (value == ",") {
6870                 abort();
6871               }
6872               results.push(get(value));
6873             }
6874             return results;
6875           } else if (value == "{") {
6876             // Parses a JSON object, returning a new JavaScript object.
6877             results = {};
6878             for (;; hasMembers || (hasMembers = true)) {
6879               value = lex();
6880               // A closing curly brace marks the end of the object literal.
6881               if (value == "}") {
6882                 break;
6883               }
6884               // If the object literal contains members, the current token
6885               // should be a comma separator.
6886               if (hasMembers) {
6887                 if (value == ",") {
6888                   value = lex();
6889                   if (value == "}") {
6890                     // Unexpected trailing `,` in object literal.
6891                     abort();
6892                   }
6893                 } else {
6894                   // A `,` must separate each object member.
6895                   abort();
6896                 }
6897               }
6898               // Leading commas are not permitted, object property names must be
6899               // double-quoted strings, and a `:` must separate each property
6900               // name and value.
6901               if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
6902                 abort();
6903               }
6904               results[value.slice(1)] = get(lex());
6905             }
6906             return results;
6907           }
6908           // Unexpected token encountered.
6909           abort();
6910         }
6911         return value;
6912       };
6913 
6914       // Internal: Updates a traversed object member.
6915       var update = function(source, property, callback) {
6916         var element = walk(source, property, callback);
6917         if (element === undef) {
6918           delete source[property];
6919         } else {
6920           source[property] = element;
6921         }
6922       };
6923 
6924       // Internal: Recursively traverses a parsed JSON object, invoking the
6925       // `callback` function for each value. This is an implementation of the
6926       // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
6927       var walk = function (source, property, callback) {
6928         var value = source[property], length;
6929         if (typeof value == "object" && value) {
6930           // `forEach` can't be used to traverse an array in Opera <= 8.54
6931           // because its `Object#hasOwnProperty` implementation returns `false`
6932           // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
6933           if (getClass.call(value) == arrayClass) {
6934             for (length = value.length; length--;) {
6935               update(value, length, callback);
6936             }
6937           } else {
6938             forEach(value, function (property) {
6939               update(value, property, callback);
6940             });
6941           }
6942         }
6943         return callback.call(source, property, value);
6944       };
6945 
6946       // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
6947       JSON3.parse = function (source, callback) {
6948         var result, value;
6949         Index = 0;
6950         Source = "" + source;
6951         result = get(lex());
6952         // If a JSON string contains multiple tokens, it is invalid.
6953         if (lex() != "$") {
6954           abort();
6955         }
6956         // Reset the parser state.
6957         Index = Source = null;
6958         return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
6959       };
6960     }
6961   }
6962 
6963   // Export for asynchronous module loaders.
6964   if (isLoader) {
6965     define(function () {
6966       return JSON3;
6967     });
6968   }
6969 }(this));
6970 
6971 },{}],48:[function(_dereq_,module,exports){
6972 module.exports = toArray
6973 
6974 function toArray(list, index) {
6975     var array = []
6976 
6977     index = index || 0
6978 
6979     for (var i = index || 0; i < list.length; i++) {
6980         array[i - index] = list[i]
6981     }
6982 
6983     return array
6984 }
6985 
6986 },{}]},{},[1])
6987 (1)
6988 });

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项目结构如下图：

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原文地址：https://www.cnblogs.com/yinhao-jack/p/10298012.html