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socket.io-client/dist/socket.io.js

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1/*! Socket.IO.js build:0.7.9, development. Copyright(c) 2011 LearnBoost <dev@learnboost.com> MIT Licensed */
2
3/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
8
9(function (exports) {
10
/**
 * IO namespace.
 *
 * @namespace
 */
16
var io = exports;
18
/**
 * Socket.IO version
 *
 * @api public
 */
24
io.version = '0.7.9';
26
/**
 * Protocol implemented.
 *
 * @api public
 */
32
io.protocol = 1;
34
/**
 * Available transports, these will be populated with the available transports
 *
 * @api public
 */
40
io.transports = [];
42
/**
 * Keep track of jsonp callbacks.
 *
 * @api private
 */
48
io.j = [];
50
/**
 * Keep track of our io.Sockets
 *
 * @api private
 */
io.sockets = {};
57
58
/**
 * Manages connections to hosts.
 *
 * @param {String} uri
 * @Param {Boolean} force creation of new socket (defaults to false)
 * @api public
 */
66
io.connect = function (host, details) {
  var uri = io.util.parseUri(host)
    , uuri
    , socket;
71
  if ('undefined' != typeof document) {
    uri.protocol = uri.protocol || document.location.protocol.slice(0, -1);
    uri.host = uri.host || document.domain;
    uri.port = uri.port || document.location.port;
  }
77
  uuri = io.util.uniqueUri(uri);
79
  var options = {
      host: uri.host
    , secure: 'https' == uri.protocol
    , port: uri.port || ('https' == uri.protocol ? 443 : 80)
    , query: uri.query || ''
  };
86
  io.util.merge(options, details);
88
  if (options['force new connection'] || !io.sockets[uuri]) {
    socket = new io.Socket(options);
  }
92
  if (!options['force new connection'] && socket) {
    io.sockets[uuri] = socket;
  }
96
  socket = socket || io.sockets[uuri];
98
  // if path is different from '' or /
  return socket.of(uri.path.length > 1 ? uri.path : '');
};
102
103})('object' === typeof module ? module.exports : (window.io = {}));
104
105/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
110
111(function (exports, global) {
112
/**
 * Utilities namespace.
 *
 * @namespace
 */
118
var util = exports.util = {};
120
/**
 * Parses an URI
 *
 * @author Steven Levithan <stevenlevithan.com> (MIT license)
 * @api public
 */
127
var re = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
129
var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password',
             'host', 'port', 'relative', 'path', 'directory', 'file', 'query',
             'anchor'];
133
util.parseUri = function (str) {
  var m = re.exec(str || '')
    , uri = {}
    , i = 14;
138
  while (i--) {
    uri[parts[i]] = m[i] || '';
  }
142
  return uri;
};
145
/**
 * Produces a unique url that identifies a Socket.IO connection.
 *
 * @param {Object} uri
 * @api public
 */
152
util.uniqueUri = function (uri) {
  var protocol = uri.protocol
    , host = uri.host
    , port = uri.port;
157
  if ('document' in global) {
    host = host || document.domain;
    port = port || (protocol == 'https'
      && document.location.protocol !== 'https:' ? 443 : document.location.port);
  } else {
    host = host || 'localhost';
164
    if (!port && protocol == 'https') {
      port = 443;
    }
  }
169
  return (protocol || 'http') + '://' + host + ':' + (port || 80);
};
172
/**
 * Mergest 2 query strings in to once unique query string
 *
 * @param {String} base
 * @param {String} addition
 * @api public
 */
180
util.query = function (base, addition) {
  var query = util.chunkQuery(base || '')
    , components = [];
184
  util.merge(query, util.chunkQuery(addition || ''));
  for (var part in query) {
    if (query.hasOwnProperty(part)) {
      components.push(part + '=' + query[part]);
    }
  }
191
  return components.length ? '?' + components.join('&') : '';
};
194
/**
 * Transforms a querystring in to an object
 *
 * @param {String} qs
 * @api public
 */
201
util.chunkQuery = function (qs) {
  var query = {}
    , params = qs.split('&')
    , i = 0
    , l = params.length
    , kv;
208
  for (; i < l; ++i) {
    kv = params[i].split('=');
    if (kv[0]) {
      query[kv[0]] = decodeURIComponent(kv[1]);
    }
  }
215
  return query;
};
218
/**
 * Executes the given function when the page is loaded.
 *
 *     io.util.load(function () { console.log('page loaded'); });
 *
 * @param {Function} fn
 * @api public
 */
227
var pageLoaded = false;
229
util.load = function (fn) {
  if ('document' in global && document.readyState === 'complete' || pageLoaded) {
    return fn();
  }
234
  util.on(global, 'load', fn, false);
};
237
/**
 * Adds an event.
 *
 * @api private
 */
243
util.on = function (element, event, fn, capture) {
  if (element.attachEvent) {
    element.attachEvent('on' + event, fn);
  } else if (element.addEventListener) {
    element.addEventListener(event, fn, capture);
  }
};
251
/**
 * Generates the correct `XMLHttpRequest` for regular and cross domain requests.
 *
 * @param {Boolean} [xdomain] Create a request that can be used cross domain.
 * @returns {XMLHttpRequest|false} If we can create a XMLHttpRequest.
 * @api private
 */
259
util.request = function (xdomain) {
261
  if ('undefined' != typeof window) {
    if (xdomain && window.XDomainRequest) {
      return new XDomainRequest();
    }
266
    if (window.XMLHttpRequest && (!xdomain || util.ua.hasCORS)) {
      return new XMLHttpRequest();
    }
270
    if (!xdomain) {
      try {
        return new window.ActiveXObject('Microsoft.XMLHTTP');
      } catch(e) { }
    }
  }
277
  return null;
};
280
/**
 * XHR based transport constructor.
 *
 * @constructor
 * @api public
 */
287
/**
 * Change the internal pageLoaded value.
 */
291
if ('undefined' != typeof window) {
  util.load(function () {
    pageLoaded = true;
  });
}
297
/**
 * Defers a function to ensure a spinner is not displayed by the browser
 *
 * @param {Function} fn
 * @api public
 */
304
util.defer = function (fn) {
  if (!util.ua.webkit) {
    return fn();
  }
309
  util.load(function () {
    setTimeout(fn, 100);
  });
};
314
/**
 * Merges two objects.
 *
 * @api public
 */

util.merge = function merge (target, additional, deep, lastseen) {
  var seen = lastseen || []
    , depth = typeof deep == 'undefined' ? 2 : deep
    , prop;
325
  for (prop in additional) {
    if (additional.hasOwnProperty(prop) && util.indexOf(seen, prop) < 0) {
      if (typeof target[prop] !== 'object' || !depth) {
        target[prop] = additional[prop];
        seen.push(additional[prop]);
      } else {
        util.merge(target[prop], additional[prop], depth - 1, seen);
      }
    }
  }
336
  return target;
};
339
/**
 * Merges prototypes from objects
 *
 * @api public
 */

util.mixin = function (ctor, ctor2) {
  util.merge(ctor.prototype, ctor2.prototype);
};
349
/**
 * Shortcut for prototypical and static inheritance.
 *
 * @api private
 */
355
util.inherit = function (ctor, ctor2) {
  function f() {};
  f.prototype = ctor2.prototype;
  ctor.prototype = new f;
};
361
/**
 * Checks if the given object is an Array.
 *
 *     io.util.isArray([]); // true
 *     io.util.isArray({}); // false
 *
 * @param Object obj
 * @api public
 */
371
util.isArray = Array.isArray || function (obj) {
  return Object.prototype.toString.call(obj) === '[object Array]';
};
375
/**
 * Intersects values of two arrays into a third
 *
 * @api public
 */
381
util.intersect = function (arr, arr2) {
  var ret = []
    , longest = arr.length > arr2.length ? arr : arr2
    , shortest = arr.length > arr2.length ? arr2 : arr;
386
  for (var i = 0, l = shortest.length; i < l; i++) {
    if (~util.indexOf(longest, shortest[i]))
      ret.push(shortest[i]);
  }
391
  return ret;
}
394
/**
 * Array indexOf compatibility.
 *
 * @see bit.ly/a5Dxa2
 * @api public
 */
401
util.indexOf = function (arr, o, i) {
  if (Array.prototype.indexOf) {
    return Array.prototype.indexOf.call(arr, o, i);
  }
406
  for (var j = arr.length, i = i < 0 ? i + j < 0 ? 0 : i + j : i || 0; 
       i < j && arr[i] !== o; i++);
409
  return j <= i ? -1 : i;
};
412
/**
 * Converts enumerables to array.
 *
 * @api public
 */
418
util.toArray = function (enu) {
  var arr = [];
421
  for (var i = 0, l = enu.length; i < l; i++)
    arr.push(enu[i]);
424
  return arr;
};
427
/**
 * UA / engines detection namespace.
 *
 * @namespace
 */
433
util.ua = {};
435
/**
 * Whether the UA supports CORS for XHR.
 *
 * @api public
 */
441
util.ua.hasCORS = 'undefined' != typeof window && window.XMLHttpRequest &&
(function () {
  try {
    var a = new XMLHttpRequest();
  } catch (e) {
    return false;
  }
449
  return a.withCredentials != undefined;
})();
452
/**
 * Detect webkit.
 *
 * @api public
 */
458
util.ua.webkit = 'undefined' != typeof navigator
  && /webkit/i.test(navigator.userAgent);
461
462})(
  'undefined' != typeof window ? io : module.exports
, this
465);
466
467/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
472
473(function (exports, io) {
474
/**
 * Expose constructor.
 */
478
exports.EventEmitter = EventEmitter;
480
/**
 * Event emitter constructor.
 *
 * @api public.
 */
486
function EventEmitter () {};
488
/**
 * Adds a listener
 *
 * @api public
 */
494
EventEmitter.prototype.on = function (name, fn) {
  if (!this.$events) {
    this.$events = {};
  }
499
  if (!this.$events[name]) {
    this.$events[name] = fn;
  } else if (io.util.isArray(this.$events[name])) {
    this.$events[name].push(fn);
  } else {
    this.$events[name] = [this.$events[name], fn];
  }
507
  return this;
};
510
EventEmitter.prototype.addListener = EventEmitter.prototype.on;
512
/**
 * Adds a volatile listener.
 *
 * @api public
 */
518
EventEmitter.prototype.once = function (name, fn) {
  var self = this;
521
  function on () {
    self.removeListener(name, on);
    fn.apply(this, arguments);
  };
526
  on.listener = fn;
  this.on(name, on);
529
  return this;
};
532
/**
 * Removes a listener.
 *
 * @api public
 */
538
EventEmitter.prototype.removeListener = function (name, fn) {
  if (this.$events && this.$events[name]) {
    var list = this.$events[name];
542
    if (io.util.isArray(list)) {
      var pos = -1;
545
      for (var i = 0, l = list.length; i < l; i++) {
        if (list[i] === fn || (list[i].listener && list[i].listener === fn)) {
          pos = i;
          break;
        }
      }
552
      if (pos < 0) {
        return this;
      }
556
      list.splice(pos, 1);
558
      if (!list.length) {
        delete this.$events[name];
      }
    } else if (list === fn || (list.listener && list.listener === fn)) {
      delete this.$events[name];
    }
  }
566
  return this;
};
569
/**
 * Removes all listeners for an event.
 *
 * @api public
 */
575
EventEmitter.prototype.removeAllListeners = function (name) {
  // TODO: enable this when node 0.5 is stable
  //if (name === undefined) {
    //this.$events = {};
    //return this;
  //}
582
  if (this.$events && this.$events[name]) {
    this.$events[name] = null;
  }
586
  return this;
};
589
/**
 * Gets all listeners for a certain event.
 *
 * @api publci
 */
595
EventEmitter.prototype.listeners = function (name) {
  if (!this.$events) {
    this.$events = {};
  }
600
  if (!this.$events[name]) {
    this.$events[name] = [];
  }
604
  if (!io.util.isArray(this.$events[name])) {
    this.$events[name] = [this.$events[name]];
  }
608
  return this.$events[name];
};
611
/**
 * Emits an event.
 *
 * @api public
 */
617
EventEmitter.prototype.emit = function (name) {
  if (!this.$events) {
    return false;
  }
622
  var handler = this.$events[name];
624
  if (!handler) {
    return false;
  }
628
  var args = Array.prototype.slice.call(arguments, 1);
630
  if ('function' == typeof handler) {
    handler.apply(this, args);
  } else if (io.util.isArray(handler)) {
    var listeners = handler.slice();
635
    for (var i = 0, l = listeners.length; i < l; i++) {
      listeners[i].apply(this, args);
    }
  } else {
    return false;
  }
642
  return true;
};
645
646})(
  'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
649);
650
651/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
656
657/**
* Based on JSON2 (http://www.JSON.org/js.html).
*/
660
661(function (exports, nativeJSON) {
"use strict";
663
// use native JSON if it's available
if (nativeJSON && nativeJSON.parse){
  return exports.JSON = {
    parse: nativeJSON.parse
  , stringify: nativeJSON.stringify
  }
}
671
var JSON = exports.JSON = {};
673
function f(n) {
    // Format integers to have at least two digits.
    return n < 10 ? '0' + n : n;
}
678
function date(d, key) {
  return isFinite(d.valueOf()) ?
      d.getUTCFullYear()     + '-' +
      f(d.getUTCMonth() + 1) + '-' +
      f(d.getUTCDate())      + 'T' +
      f(d.getUTCHours())     + ':' +
      f(d.getUTCMinutes())   + ':' +
      f(d.getUTCSeconds())   + 'Z' : null;
};
688
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
    escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
    gap,
    indent,
    meta = {    // table of character substitutions
        '\b': '\\b',
        '\t': '\\t',
        '\n': '\\n',
        '\f': '\\f',
        '\r': '\\r',
        '"' : '\\"',
        '\\': '\\\\'
    },
    rep;
703
704
function quote(string) {
706
707// If the string contains no control characters, no quote characters, and no
708// backslash characters, then we can safely slap some quotes around it.
709// Otherwise we must also replace the offending characters with safe escape
710// sequences.
711
    escapable.lastIndex = 0;
    return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
        var c = meta[a];
        return typeof c === 'string' ? c :
            '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
    }) + '"' : '"' + string + '"';
}
719
720
function str(key, holder) {
722
723// Produce a string from holder[key].
724
    var i,          // The loop counter.
        k,          // The member key.
        v,          // The member value.
        length,
        mind = gap,
        partial,
        value = holder[key];
732
733// If the value has a toJSON method, call it to obtain a replacement value.
734
    if (value instanceof Date) {
        value = date(key);
    }
738
739// If we were called with a replacer function, then call the replacer to
740// obtain a replacement value.
741
    if (typeof rep === 'function') {
        value = rep.call(holder, key, value);
    }
745
746// What happens next depends on the value's type.
747
    switch (typeof value) {
    case 'string':
        return quote(value);
751
    case 'number':
753
754// JSON numbers must be finite. Encode non-finite numbers as null.
755
        return isFinite(value) ? String(value) : 'null';
757
    case 'boolean':
    case 'null':
760
761// If the value is a boolean or null, convert it to a string. Note:
762// typeof null does not produce 'null'. The case is included here in
763// the remote chance that this gets fixed someday.
764
        return String(value);
766
767// If the type is 'object', we might be dealing with an object or an array or
768// null.
769
    case 'object':
771
772// Due to a specification blunder in ECMAScript, typeof null is 'object',
773// so watch out for that case.
774
        if (!value) {
            return 'null';
        }
778
779// Make an array to hold the partial results of stringifying this object value.
780
        gap += indent;
        partial = [];
783
784// Is the value an array?
785
        if (Object.prototype.toString.apply(value) === '[object Array]') {
787
788// The value is an array. Stringify every element. Use null as a placeholder
789// for non-JSON values.
790
            length = value.length;
            for (i = 0; i < length; i += 1) {
                partial[i] = str(i, value) || 'null';
            }
795
796// Join all of the elements together, separated with commas, and wrap them in
797// brackets.
798
            v = partial.length === 0 ? '[]' : gap ?
                '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
                '[' + partial.join(',') + ']';
            gap = mind;
            return v;
        }
805
806// If the replacer is an array, use it to select the members to be stringified.
807
        if (rep && typeof rep === 'object') {
            length = rep.length;
            for (i = 0; i < length; i += 1) {
                if (typeof rep[i] === 'string') {
                    k = rep[i];
                    v = str(k, value);
                    if (v) {
                        partial.push(quote(k) + (gap ? ': ' : ':') + v);
                    }
                }
            }
        } else {
820
821// Otherwise, iterate through all of the keys in the object.
822
            for (k in value) {
                if (Object.prototype.hasOwnProperty.call(value, k)) {
                    v = str(k, value);
                    if (v) {
                        partial.push(quote(k) + (gap ? ': ' : ':') + v);
                    }
                }
            }
        }
832
833// Join all of the member texts together, separated with commas,
834// and wrap them in braces.
835
        v = partial.length === 0 ? '{}' : gap ?
            '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
            '{' + partial.join(',') + '}';
        gap = mind;
        return v;
    }
}
843
844// If the JSON object does not yet have a stringify method, give it one.
845
JSON.stringify = function (value, replacer, space) {
847
848// The stringify method takes a value and an optional replacer, and an optional
849// space parameter, and returns a JSON text. The replacer can be a function
850// that can replace values, or an array of strings that will select the keys.
851// A default replacer method can be provided. Use of the space parameter can
852// produce text that is more easily readable.
853
    var i;
    gap = '';
    indent = '';
857
858// If the space parameter is a number, make an indent string containing that
859// many spaces.
860
    if (typeof space === 'number') {
        for (i = 0; i < space; i += 1) {
            indent += ' ';
        }
865
866// If the space parameter is a string, it will be used as the indent string.
867
    } else if (typeof space === 'string') {
        indent = space;
    }
871
872// If there is a replacer, it must be a function or an array.
873// Otherwise, throw an error.
874
    rep = replacer;
    if (replacer && typeof replacer !== 'function' &&
            (typeof replacer !== 'object' ||
            typeof replacer.length !== 'number')) {
        throw new Error('JSON.stringify');
    }
881
882// Make a fake root object containing our value under the key of ''.
883// Return the result of stringifying the value.
884
    return str('', {'': value});
};
887
888// If the JSON object does not yet have a parse method, give it one.
889
JSON.parse = function (text, reviver) {
// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.
893
    var j;
895
    function walk(holder, key) {
897
// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.
900
        var k, v, value = holder[key];
        if (value && typeof value === 'object') {
            for (k in value) {
                if (Object.prototype.hasOwnProperty.call(value, k)) {
                    v = walk(value, k);
                    if (v !== undefined) {
                        value[k] = v;
                    } else {
                        delete value[k];
                    }
                }
            }
        }
        return reviver.call(holder, key, value);
    }
916
917
// Parsing happens in four stages. In the first stage, we replace certain
// Unicode characters with escape sequences. JavaScript handles many characters
// incorrectly, either silently deleting them, or treating them as line endings.
921
    text = String(text);
    cx.lastIndex = 0;
    if (cx.test(text)) {
        text = text.replace(cx, function (a) {
            return '\\u' +
                ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
        });
    }
930
// In the second stage, we run the text against regular expressions that look
// for non-JSON patterns. We are especially concerned with '()' and 'new'
// because they can cause invocation, and '=' because it can cause mutation.
// But just to be safe, we want to reject all unexpected forms.
935
// We split the second stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
943
    if (/^[\],:{}\s]*$/
            .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
                .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
                .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
948
// In the third stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.
953
        j = eval('(' + text + ')');
955
// In the optional fourth stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.
958
        return typeof reviver === 'function' ?
            walk({'': j}, '') : j;
    }
962
// If the text is not JSON parseable, then a SyntaxError is thrown.
964
    throw new SyntaxError('JSON.parse');
};
967
968})(
  'undefined' != typeof io ? io : module.exports
, typeof JSON !== 'undefined' ? JSON : undefined
971);
972
973/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
978
979(function (exports, io) {
980
/**
 * Parser namespace.
 *
 * @namespace
 */
986
var parser = exports.parser = {};
988
/**
 * Packet types.
 */
992
var packets = parser.packets = [
    'disconnect'
  , 'connect'
  , 'heartbeat'
  , 'message'
  , 'json'
  , 'event'
  , 'ack'
  , 'error'
  , 'noop'
];
1004
/**
 * Errors reasons.
 */
1008
var reasons = parser.reasons = [
    'transport not supported'
  , 'client not handshaken'
  , 'unauthorized'
];
1014
/**
 * Errors advice.
 */
1018
var advice = parser.advice = [
    'reconnect'
];
1022
/**
 * Shortcuts.
 */
1026
var JSON = io.JSON
  , indexOf = io.util.indexOf;
1029
/**
 * Encodes a packet.
 *
 * @api private
 */
1035
parser.encodePacket = function (packet) {
  var type = indexOf(packets, packet.type)
    , id = packet.id || ''
    , endpoint = packet.endpoint || ''
    , ack = packet.ack
    , data = null;
1042
  switch (packet.type) {
    case 'error':
      var reason = packet.reason ? indexOf(reasons, packet.reason) : ''
        , adv = packet.advice ? indexOf(advice, packet.advice) : '';
1047
      if (reason !== '' || adv !== '')
        data = reason + (adv !== '' ? ('+' + adv) : '');
1050
      break;
1052
    case 'message':
      if (packet.data !== '')
        data = packet.data;
      break;
1057
    case 'event':
      var ev = { name: packet.name };
1060
      if (packet.args && packet.args.length) {
        ev.args = packet.args;
      }
1064
      data = JSON.stringify(ev);
      break;
1067
    case 'json':
      data = JSON.stringify(packet.data);
      break;
1071
    case 'connect':
      if (packet.qs)
        data = packet.qs;
      break;
1076
    case 'ack':
      data = packet.ackId
        + (packet.args && packet.args.length
            ? '+' + JSON.stringify(packet.args) : '');
      break;
  }
1083
  // construct packet with required fragments
  var encoded = [
      type
    , id + (ack == 'data' ? '+' : '')
    , endpoint
  ];
1090
  // data fragment is optional
  if (data !== null && data !== undefined)
    encoded.push(data);
1094
  return encoded.join(':');
};
1097
/**
 * Encodes multiple messages (payload).
 *
 * @param {Array} messages
 * @api private
 */
1104
parser.encodePayload = function (packets) {
  var decoded = '';
1107
  if (packets.length == 1)
    return packets[0];
1110
  for (var i = 0, l = packets.length; i < l; i++) {
    var packet = packets[i];
    decoded += '\ufffd' + packet.length + '\ufffd' + packets[i];
  }
1115
  return decoded;
};
1118
/**
 * Decodes a packet
 *
 * @api private
 */
1124
var regexp = /^([^:]+):([0-9]+)?(\+)?:([^:]+)?:?(.*)?$/;
1126
parser.decodePacket = function (data) {
  var pieces = data.match(regexp);
1129
  if (!pieces) return {};
1131
  var id = pieces[2] || ''
    , data = pieces[5] || ''
    , packet = {
          type: packets[pieces[1]]
        , endpoint: pieces[4] || ''
      };
1138
  // whether we need to acknowledge the packet
  if (id) {
    packet.id = id;
    if (pieces[3])
      packet.ack = 'data';
    else
      packet.ack = true;
  }
1147
  // handle different packet types
  switch (packet.type) {
    case 'error':
      var pieces = data.split('+');
      packet.reason = reasons[pieces[0]] || '';
      packet.advice = advice[pieces[1]] || '';
      break;
1155
    case 'message':
      packet.data = data || '';
      break;
1159
    case 'event':
      try {
        var opts = JSON.parse(data);
        packet.name = opts.name;
        packet.args = opts.args;
      } catch (e) { }
1166
      packet.args = packet.args || [];
      break;
1169
    case 'json':
      try {
        packet.data = JSON.parse(data);
      } catch (e) { }
      break;
1175
    case 'connect':
      packet.qs = data || '';
      break;
1179
    case 'ack':
      var pieces = data.match(/^([0-9]+)(\+)?(.*)/);
      if (pieces) {
        packet.ackId = pieces[1];
        packet.args = [];
1185
        if (pieces[3]) {
          try {
            packet.args = pieces[3] ? JSON.parse(pieces[3]) : [];
          } catch (e) { }
        }
      }
      break;
1193
    case 'disconnect':
    case 'heartbeat':
      break;
  };
1198
  return packet;
};
1201
/**
 * Decodes data payload. Detects multiple messages
 *
 * @return {Array} messages
 * @api public
 */
1208
parser.decodePayload = function (data) {
  // IE doesn't like data[i] for unicode chars, charAt works fine
  if (data.charAt(0) == '\ufffd') {
    var ret = [];
1213
    for (var i = 1, length = ''; i < data.length; i++) {
      if (data.charAt(i) == '\ufffd') {
        ret.push(parser.decodePacket(data.substr(i + 1).substr(0, length)));
        i += Number(length) + 1;
        length = '';
      } else {
        length += data.charAt(i);
      }
    }
1223
    return ret;
  } else {
    return [parser.decodePacket(data)];
  }
};
1229
1230})(
  'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
1233);
1234
1235/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
1240
1241(function (exports, io) {
1242
/**
 * Expose constructor.
 */
1246
exports.Transport = Transport;
1248
/**
 * This is the transport template for all supported transport methods.
 *
 * @constructor
 * @api public
 */
1255
function Transport (socket, sessid) {
  this.socket = socket;
  this.sessid = sessid;
};
1260
/**
 * Apply EventEmitter mixin.
 */
1264
io.util.mixin(Transport, io.EventEmitter);
1266
/**
 * Handles the response from the server. When a new response is received
 * it will automatically update the timeout, decode the message and
 * forwards the response to the onMessage function for further processing.
 *
 * @param {String} data Response from the server.
 * @api private
 */
1275
Transport.prototype.onData = function (data) {
  this.clearCloseTimeout();
  this.setCloseTimeout();
1279
  if (data !== '') {
    // todo: we should only do decodePayload for xhr transports
    var msgs = io.parser.decodePayload(data);
1283
    if (msgs && msgs.length) {
      for (var i = 0, l = msgs.length; i < l; i++) {
        this.onPacket(msgs[i]);
      }
    }
  }
1290
  return this;
};
1293
/**
 * Handles packets.
 *
 * @api private
 */
1299
Transport.prototype.onPacket = function (packet) {
  if (packet.type == 'heartbeat') {
    return this.onHeartbeat();
  }
1304
  if (packet.type == 'connect' && packet.endpoint == '') {
    this.onConnect();
  }
1308
  this.socket.onPacket(packet);
1310
  return this;
};
1313
/**
 * Sets close timeout
 *
 * @api private
 */

Transport.prototype.setCloseTimeout = function () {
  if (!this.closeTimeout) {
    var self = this;
1323
    this.closeTimeout = setTimeout(function () {
      self.onDisconnect();
    }, this.socket.closeTimeout);
  }
};
1329
/**
 * Called when transport disconnects.
 *
 * @api private
 */
1335
Transport.prototype.onDisconnect = function () {
  if (this.close) this.close();
  this.clearTimeouts();
  this.socket.onDisconnect();
  return this;
};
1342
/**
 * Called when transport connects
 *
 * @api private
 */
1348
Transport.prototype.onConnect = function () {
  this.socket.onConnect();
  return this;
}
1353
/**
 * Clears close timeout
 *
 * @api private
 */
1359
Transport.prototype.clearCloseTimeout = function () {
  if (this.closeTimeout) {
    clearTimeout(this.closeTimeout);
    this.closeTimeout = null;
  }
};
1366
/**
 * Clear timeouts
 *
 * @api private
 */
1372
Transport.prototype.clearTimeouts = function () {
  this.clearCloseTimeout();
1375
  if (this.reopenTimeout) {
    clearTimeout(this.reopenTimeout);
  }
};
1380
/**
 * Sends a packet
 *
 * @param {Object} packet object.
 * @api private
 */
1387
Transport.prototype.packet = function (packet) {
  this.send(io.parser.encodePacket(packet));
};
1391
/**
 * Send the received heartbeat message back to server. So the server
 * knows we are still connected.
 *
 * @param {String} heartbeat Heartbeat response from the server.
 * @api private
 */
1399
Transport.prototype.onHeartbeat = function (heartbeat) {
  this.packet({ type: 'heartbeat' });
};

/**
 * Called when the transport opens.
 *
 * @api private
 */
1409
Transport.prototype.onOpen = function () {
  this.open = true;
  this.clearCloseTimeout();
  this.socket.onOpen();
};
1415
/**
 * Notifies the base when the connection with the Socket.IO server
 * has been disconnected.
 *
 * @api private
 */
1422
Transport.prototype.onClose = function () {
  var self = this;
1425
  /* FIXME: reopen delay causing a infinit loop
  this.reopenTimeout = setTimeout(function () {
    self.open();
  }, this.socket.options['reopen delay']);*/
1430
  this.open = false;
  this.setCloseTimeout();
  this.socket.onClose();
};
1435
/**
 * Generates a connection url based on the Socket.IO URL Protocol.
 * See <https://github.com/learnboost/socket.io-node/> for more details.
 *
 * @returns {String} Connection url
 * @api private
 */
1443
Transport.prototype.prepareUrl = function () {
  var options = this.socket.options;
1446
  return this.scheme() + '://'
    + options.host + ':' + options.port + '/'
    + options.resource + '/' + io.protocol
    + '/' + this.name + '/' + this.sessid;
};
1452
/**
 * Checks if the transport is ready to start a connection.
 *
 * @param {Socket} socket The socket instance that needs a transport
 * @param {Function} fn The callback
 * @api private
 */
1460
Transport.prototype.ready = function (socket, fn) {
  fn.call(this);
};
1464})(
  'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
1467);
1468
1469/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
1474
1475(function (exports, io, global) {
1476
/**
 * Expose constructor.
 */
1480
exports.Socket = Socket;
1482
/**
 * Create a new `Socket.IO client` which can establish a persistent
 * connection with a Socket.IO enabled server.
 *
 * @api public
 */
1489
function Socket (options) {
  this.options = {
      port: 80
    , secure: false
    , document: 'document' in global ? document : false
    , resource: 'socket.io'
    , transports: io.transports
    , 'connect timeout': 10000
    , 'try multiple transports': true
    , 'reconnect': true
    , 'reconnection delay': 500
    , 'reconnection limit': Infinity
    , 'reopen delay': 3000
    , 'max reconnection attempts': 10
    , 'sync disconnect on unload': true
    , 'auto connect': true
  };
1507
  io.util.merge(this.options, options);
1509
  this.connected = false;
  this.open = false;
  this.connecting = false;
  this.reconnecting = false;
  this.namespaces = {};
  this.buffer = [];
  this.doBuffer = false;
1517
  if (this.options['sync disconnect on unload'] &&
      (!this.isXDomain() || io.util.ua.hasCORS)) {
    var self = this;
1521
    io.util.on(global, 'beforeunload', function () {
      self.disconnectSync();
    }, false);
  }
1526
  if (this.options['auto connect']) {
    this.connect();
  }
1530};
1531
/**
 * Apply EventEmitter mixin.
 */
1535
io.util.mixin(Socket, io.EventEmitter);
1537
/**
 * Returns a namespace listener/emitter for this socket
 *
 * @api public
 */
1543
Socket.prototype.of = function (name) {
  if (!this.namespaces[name]) {
    this.namespaces[name] = new io.SocketNamespace(this, name);
1547
    if (name !== '') {
      this.namespaces[name].packet({ type: 'connect' });
    }
  }
1552
  return this.namespaces[name];
};
1555
/**
 * Emits the given event to the Socket and all namespaces
 *
 * @api private
 */
1561
Socket.prototype.publish = function () {
  this.emit.apply(this, arguments);
1564
  var nsp;
1566
  for (var i in this.namespaces) {
    if (this.namespaces.hasOwnProperty(i)) {
      nsp = this.of(i);
      nsp.$emit.apply(nsp, arguments);
    }
  }
};
1574
/**
 * Performs the handshake
 *
 * @api private
 */
1580
function empty () { };
1582
Socket.prototype.handshake = function (fn) {
  var self = this
    , options = this.options;
1586
  function complete (data) {
    if (data instanceof Error) {
      self.onError(data.message);
    } else {
      fn.apply(null, data.split(':'));
    }
  };
1594
  var url = [
        'http' + (options.secure ? 's' : '') + ':/'
      , options.host + ':' + options.port
      , this.options.resource
      , io.protocol
      , io.util.query(this.options.query, 't=' + +new Date)
    ].join('/');
1602
  if (this.isXDomain()) {
    var insertAt = document.getElementsByTagName('script')[0]
      , script = document.createElement('SCRIPT');
1606
    script.src = url + '&jsonp=' + io.j.length;
    insertAt.parentNode.insertBefore(script, insertAt);
1609
    io.j.push(function (data) {
      complete(data);
      script.parentNode.removeChild(script);
    });
  } else {
    var xhr = io.util.request();
1616
    xhr.open('GET', url, true);
    xhr.onreadystatechange = function () {
      if (xhr.readyState == 4) {
        xhr.onreadystatechange = empty;
1621
        if (xhr.status == 200) {
          complete(xhr.responseText);
        } else {
          !self.reconnecting && self.onError(xhr.responseText);
        }
      }
    };
    xhr.send(null);
  }
};
1632
/**
 * Find an available transport based on the options supplied in the constructor.
 *
 * @api private
 */
1638
Socket.prototype.getTransport = function (override) {
  var transports = override || this.transports, match;
1641
  for (var i = 0, transport; transport = transports[i]; i++) {
    if (io.Transport[transport]
      && io.Transport[transport].check(this)
      && (!this.isXDomain() || io.Transport[transport].xdomainCheck())) {
      return new io.Transport[transport](this, this.sessionid);
    }
  }
1649
  return null;
};
1652
/**
 * Connects to the server.
 *
 * @param {Function} [fn] Callback.
 * @returns {io.Socket}
 * @api public
 */
1660
Socket.prototype.connect = function (fn) {
  if (this.connecting) {
    return this;
  }
1665
  var self = this;
1667
  this.handshake(function (sid, heartbeat, close, transports) {
    self.sessionid = sid;
    self.closeTimeout = close * 1000;
    self.heartbeatTimeout = heartbeat * 1000;
    self.transports = io.util.intersect(
        transports.split(',')
      , self.options.transports
    );
1676
    function connect (transports){
      self.transport = self.getTransport(transports);
      if (!self.transport) return self.publish('connect_failed');
1680
      // once the transport is ready
      self.transport.ready(self, function () {
        self.connecting = true;
        self.publish('connecting', self.transport.name);
        self.transport.open();
1686
        if (self.options['connect timeout']) {
          self.connectTimeoutTimer = setTimeout(function () {
            if (!self.connected) {
              self.connecting = false;
1691
              if (self.options['try multiple transports']) {
                if (!self.remainingTransports) {
                  self.remainingTransports = self.transports.slice(0);
                }
1696
                var remaining = self.remainingTransports;
1698
                while (remaining.length > 0 && remaining.splice(0,1)[0] !=
                       self.transport.name) {}
1701
                  if (remaining.length){
                    connect(remaining);
                  } else {
                    self.publish('connect_failed');
                  }
              }
            }
          }, self.options['connect timeout']);
        }
      });
    }
1713
    connect();
1715
    self.once('connect', function (){
      clearTimeout(self.connectTimeoutTimer);
1718
      fn && typeof fn == 'function' && fn();
    });
  });
1722
  return this;
};
1725
/**
 * Sends a message.
 *
 * @param {Object} data packet.
 * @returns {io.Socket}
 * @api public
 */
1733
Socket.prototype.packet = function (data) {
  if (this.connected && !this.doBuffer) {
    this.transport.packet(data);
  } else {
    this.buffer.push(data);
  }
1740
  return this;
};
1743
/**
 * Sets buffer state
 *
 * @api private
 */
1749
Socket.prototype.setBuffer = function (v) {
  this.doBuffer = v;
1752
  if (!v && this.connected && this.buffer.length) {
    this.transport.payload(this.buffer);
    this.buffer = [];
  }
};
1758
/**
 * Disconnect the established connect.
 *
 * @returns {io.Socket}
 * @api public
 */
1765
Socket.prototype.disconnect = function () {
  if (this.connected) {
    if (this.open) {
      this.of('').packet({ type: 'disconnect' });
    }
1771
    // handle disconnection immediately
    this.onDisconnect('booted');
  }
1775
  return this;
};
1778
/**
 * Disconnects the socket with a sync XHR.
 *
 * @api private
 */
1784
Socket.prototype.disconnectSync = function () {
  // ensure disconnection
  var xhr = io.util.request()
    , uri = this.resource + '/' + io.protocol + '/' + this.sessionid;
1789
  xhr.open('GET', uri, true);
1791
  // handle disconnection immediately
  this.onDisconnect('booted');
};
1795
/**
 * Check if we need to use cross domain enabled transports. Cross domain would
 * be a different port or different domain name.
 *
 * @returns {Boolean}
 * @api private
 */
1803
Socket.prototype.isXDomain = function () {
1805
  var locPort = window.location.port || 80;
  return this.options.host !== document.domain || this.options.port != locPort;
};
1809
/**
 * Called upon handshake.
 *
 * @api private
 */
1815
Socket.prototype.onConnect = function () {
  if (!this.connected) {
    this.connected = true;
    this.connecting = false;
    if (!this.doBuffer) {
      // make sure to flush the buffer
      this.setBuffer(false);
    }
    this.emit('connect');
  }
};
1827
/**
 * Called when the transport opens
 *
 * @api private
 */
1833
Socket.prototype.onOpen = function () {
  this.open = true;
};
1837
/**
 * Called when the transport closes.
 *
 * @api private
 */
1843
Socket.prototype.onClose = function () {
  this.open = false;
};
1847
/**
 * Called when the transport first opens a connection
 *
 * @param text
 */
1853
Socket.prototype.onPacket = function (packet) {
  this.of(packet.endpoint).onPacket(packet);
};
1857
/**
 * Handles an error.
 *
 * @api private
 */
1863
Socket.prototype.onError = function (err) {
  if (err && err.advice) {
    if (err.advice === 'reconnect' && this.connected) {
      this.disconnect();
      this.reconnect();
    }
  }
1871
  this.publish('error', err && err.reason ? err.reason : err);
};
1874
/**
 * Called when the transport disconnects.
 *
 * @api private
 */
1880
Socket.prototype.onDisconnect = function (reason) {
  var wasConnected = this.connected;
1883
  this.connected = false;
  this.connecting = false;
  this.open = false;
1887
  if (wasConnected) {
    this.transport.close();
    this.transport.clearTimeouts();
    this.publish('disconnect', reason);
1892
    if ('booted' != reason && this.options.reconnect && !this.reconnecting) {
      this.reconnect();
    }
  }
};
1898
/**
 * Called upon reconnection.
 *
 * @api private
 */
1904
Socket.prototype.reconnect = function () {
  this.reconnecting = true;
  this.reconnectionAttempts = 0;
  this.reconnectionDelay = this.options['reconnection delay'];
1909
  var self = this
    , maxAttempts = this.options['max reconnection attempts']
    , tryMultiple = this.options['try multiple transports']
    , limit = this.options['reconnection limit'];
1914
  function reset () {
    if (self.connected) {
      for (var i in self.namespaces) {
        if (self.namespaces.hasOwnProperty(i) && '' !== i) {
            self.namespaces[i].packet({ type: 'connect' });
        }
      }
      self.publish('reconnect', self.transport.name, self.reconnectionAttempts);
    }
1924
    self.removeListener('connect_failed', maybeReconnect);
    self.removeListener('connect', maybeReconnect);
1927
    self.reconnecting = false;
1929
    delete self.reconnectionAttempts;
    delete self.reconnectionDelay;
    delete self.reconnectionTimer;
    delete self.redoTransports;
1934
    self.options['try multiple transports'] = tryMultiple;
  };
1937
  function maybeReconnect () {
    if (!self.reconnecting) {
      return;
    }
1942
    if (self.connected) {
      return reset();
    };
1946
    if (self.connecting && self.reconnecting) {
      return self.reconnectionTimer = setTimeout(maybeReconnect, 1000);
    }
1950
    if (self.reconnectionAttempts++ >= maxAttempts) {
      if (!self.redoTransports) {
        self.on('connect_failed', maybeReconnect);
        self.options['try multiple transports'] = true;
        self.transport = self.getTransport();
        self.redoTransports = true;
        self.connect();
      } else {
        self.publish('reconnect_failed');
        reset();
      }
    } else {
      if (self.reconnectionDelay < limit) {
        self.reconnectionDelay *= 2; // exponential back off
      }
1966
      self.connect();
      self.publish('reconnecting', self.reconnectionDelay, self.reconnectionAttempts);
      self.reconnectionTimer = setTimeout(maybeReconnect, self.reconnectionDelay);
    }
  };
1972
  this.options['try multiple transports'] = false;
  this.reconnectionTimer = setTimeout(maybeReconnect, this.reconnectionDelay);
1975
  this.on('connect', maybeReconnect);
};
1978
1979})(
  'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
, this
1983);
1984/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
1989
1990(function (exports, io) {
1991
/**
 * Expose constructor.
 */
1995
exports.SocketNamespace = SocketNamespace;
1997
/**
 * Socket namespace constructor.
 *
 * @constructor
 * @api public
 */
2004
function SocketNamespace (socket, name) {
  this.socket = socket;
  this.name = name || '';
  this.flags = {};
  this.json = new Flag(this, 'json');
  this.ackPackets = 0;
  this.acks = {};
};
2013
/**
 * Apply EventEmitter mixin.
 */
2017
io.util.mixin(SocketNamespace, io.EventEmitter);
2019
/**
 * Copies emit since we override it
 *
 * @api private
 */
2025
SocketNamespace.prototype.$emit = io.EventEmitter.prototype.emit;
2027
/**
 * Creates a new namespace, by proxying the request to the socket. This
 * allows us to use the synax as we do on the server.
 *
 * @api public
 */
2034
SocketNamespace.prototype.of = function () {
  return this.socket.of.apply(this.socket, arguments);
};
2038
/**
 * Sends a packet.
 *
 * @api private
 */
2044
SocketNamespace.prototype.packet = function (packet) {
  packet.endpoint = this.name;
  this.socket.packet(packet);
  this.flags = {};
  return this;
};
2051
/**
 * Sends a message
 *
 * @api public
 */
2057
SocketNamespace.prototype.send = function (data, fn) {
  var packet = {
      type: this.flags.json ? 'json' : 'message'
    , data: data
  };
2063
  if ('function' == typeof fn) {
    packet.id = ++this.ackPackets;
    packet.ack = true;
    this.acks[packet.id] = fn;
  }
2069
  return this.packet(packet);
};
2072
/**
 * Emits an event
 *
 * @api public
 */

SocketNamespace.prototype.emit = function (name) {
  var args = Array.prototype.slice.call(arguments, 1)
    , lastArg = args[args.length - 1]
    , packet = {
          type: 'event'
        , name: name
      };
2086
  if ('function' == typeof lastArg) {
    packet.id = ++this.ackPackets;
    packet.ack = 'data';
    this.acks[packet.id] = lastArg;
    args = args.slice(0, args.length - 1);
  }
2093
  packet.args = args;
2095
  return this.packet(packet);
};
2098
/**
 * Disconnects the namespace
 *
 * @api private
 */
2104
SocketNamespace.prototype.disconnect = function () {
  if (this.name === '') {
    this.socket.disconnect();
  } else {
    this.packet({ type: 'disconnect' });
    this.$emit('disconnect');
  }
2112
  return this;
};
2115
/**
 * Handles a packet
 *
 * @api private
 */
2121
SocketNamespace.prototype.onPacket = function (packet) {
  var self = this;
2124
  function ack () {
    self.packet({
        type: 'ack'
      , args: io.util.toArray(arguments)
      , ackId: packet.id
    });
  };
2132
  switch (packet.type) {
    case 'connect':
      this.$emit('connect');
      break;
2137
    case 'disconnect':
      if (this.name === '') {
        this.socket.onDisconnect(packet.reason || 'booted');
      } else {
        this.$emit('disconnect', packet.reason);
      }
      break;
2145
    case 'message':
    case 'json':
      var params = ['message', packet.data];
2149
      if (packet.ack == 'data') {
        params.push(ack);
      } else if (packet.ack) {
        this.packet({ type: 'ack', ackId: packet.id });
      }
2155
      this.$emit.apply(this, params);
      break;
2158
    case 'event':
      var params = [packet.name].concat(packet.args);
2161
      if (packet.ack == 'data')
        params.push(ack);
2164
      this.$emit.apply(this, params);
      break;
2167
    case 'ack':
      if (this.acks[packet.ackId]) {
        this.acks[packet.ackId].apply(this, packet.args);
        delete this.acks[packet.ackId];
      }
      break;
2174
    case 'error':
      if (packet.advice){
        this.socket.onError(packet);
      } else {
        if (packet.reason == 'unauthorized') {
          this.$emit('connect_failed', packet.reason);
        } else {
          this.$emit('error', packet.reason);
        }
      }
      break;
  }
};
2188
/**
 * Flag interface.
 *
 * @api private
 */
2194
function Flag (nsp, name) {
  this.namespace = nsp;
  this.name = name;
};
2199
/**
 * Send a message
 *
 * @api public
 */
2205
Flag.prototype.send = function () {
  this.namespace.flags[this.name] = true;
  this.namespace.send.apply(this.namespace, arguments);
};
2210
/**
 * Emit an event
 *
 * @api public
 */
2216
Flag.prototype.emit = function () {
  this.namespace.flags[this.name] = true;
  this.namespace.emit.apply(this.namespace, arguments);
};
2221
2222})(
  'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
2225);
2226
2227/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
2232
2233(function (exports, io) {
2234
/**
 * Expose constructor.
 */
2238
exports.websocket = WS;
2240
/**
 * The WebSocket transport uses the HTML5 WebSocket API to establish an
 * persistent connection with the Socket.IO server. This transport will also
 * be inherited by the FlashSocket fallback as it provides a API compatible
 * polyfill for the WebSockets.
 *
 * @constructor
 * @extends {io.Transport}
 * @api public
 */
2251
function WS (socket) {
  io.Transport.apply(this, arguments);
};
2255
/**
 * Inherits from Transport.
 */
2259
io.util.inherit(WS, io.Transport);
2261
/**
 * Transport name
 *
 * @api public
 */
2267
WS.prototype.name = 'websocket';
2269
/**
 * Initializes a new `WebSocket` connection with the Socket.IO server. We attach
 * all the appropriate listeners to handle the responses from the server.
 *
 * @returns {Transport}
 * @api public
 */
2277
WS.prototype.open = function () {
  var self = this
    , query = io.util.query(this.socket.options.query);
2281
  this.websocket = new WebSocket(this.prepareUrl() + query);
2283
  var self = this;
  this.websocket.onopen = function () {
    self.onOpen();
    self.socket.setBuffer(false);
  };
  this.websocket.onmessage = function (ev) {
    self.onData(ev.data);
  };
  this.websocket.onclose = function () {
    self.onClose();
    self.socket.setBuffer(true);
  };
  this.websocket.onerror = function (e) {
    self.onError(e);
  };
2299
  return this;
};
2302
/**
 * Send a message to the Socket.IO server. The message will automatically be
 * encoded in the correct message format.
 *
 * @returns {Transport}
 * @api public
 */
2310
WS.prototype.send = function (data) {
  this.websocket.send(data);
  return this;
};
2315
/**
 * Payload
 *
 * @api private
 */
2321
WS.prototype.payload = function (arr) {
  for (var i = 0, l = arr.length; i < l; i++) {
    this.packet(arr[i]);
  }
  return this;
};
2328
/**
 * Disconnect the established `WebSocket` connection.
 *
 * @returns {Transport}
 * @api public
 */
2335
WS.prototype.close = function () {
  this.websocket.close();
  return this;
};
2340
/**
 * Handle the errors that `WebSocket` might be giving when we
 * are attempting to connect or send messages.
 *
 * @param {Error} e The error.
 * @api private
 */
2348
WS.prototype.onError = function (e) {
  this.socket.onError(e);
};
2352
/**
 * Returns the appropriate scheme for the URI generation.
 *
 * @api private
 */
WS.prototype.scheme = function () {
  return this.socket.options.secure ? 'wss' : 'ws';
};
2361
/**
 * Checks if the browser has support for native `WebSockets` and that
 * it's not the polyfill created for the FlashSocket transport.
 *
 * @return {Boolean}
 * @api public
 */
2369
WS.check = function () {
  return 'WebSocket' in window && !('__addTask' in WebSocket);
};
2373
/**
 * Check if the `WebSocket` transport support cross domain communications.
 *
 * @returns {Boolean}
 * @api public
 */
2380
WS.xdomainCheck = function () {
  return true;
};
2384
/**
 * Add the transport to your public io.transports array.
 *
 * @api private
 */
2390
io.transports.push('websocket');
2392
2393
2394})(
  'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
2397);
2398
2399/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
2404
2405(function (exports, io) {
2406
/**
 * Expose constructor.
 */
2410
exports.flashsocket = Flashsocket;
2412
/**
 * The FlashSocket transport. This is a API wrapper for the HTML5 WebSocket
 * specification. It uses a .swf file to communicate with the server. If you want
 * to serve the .swf file from a other server than where the Socket.IO script is
 * coming from you need to use the insecure version of the .swf. More information
 * about this can be found on the github page.
 *
 * @constructor
 * @extends {io.Transport.websocket}
 * @api public
 */
2424
function Flashsocket () {
  io.Transport.websocket.apply(this, arguments);
};
2428
/**
 * Inherits from Transport.
 */
2432
io.util.inherit(Flashsocket, io.Transport.websocket);
2434
/**
 * Transport name
 *
 * @api public
 */
2440
Flashsocket.prototype.name = 'flashsocket';
2442
/**
 *Disconnect the established `FlashSocket` connection. This is done by adding a 
 * new task to the FlashSocket. The rest will be handled off by the `WebSocket` 
 * transport.
 *
 * @returns {Transport}
 * @api public
 */
2451
Flashsocket.prototype.open = function () {
  var self = this
    , args = arguments;
2455
  WebSocket.__addTask(function () {
    io.Transport.websocket.prototype.open.apply(self, args);
  });
  return this;
};

/**
 * Sends a message to the Socket.IO server. This is done by adding a new
 * task to the FlashSocket. The rest will be handled off by the `WebSocket` 
 * transport.
 *
 * @returns {Transport}
 * @api public
 */
2470
Flashsocket.prototype.send = function () {
  var self = this, args = arguments;
  WebSocket.__addTask(function () {
    io.Transport.websocket.prototype.send.apply(self, args);
  });
  return this;
};
2478
/**
 * Disconnects the established `FlashSocket` connection.
 *
 * @returns {Transport}
 * @api public
 */
2485
Flashsocket.prototype.close = function () {
  WebSocket.__tasks.length = 0;
  io.Transport.websocket.prototype.close.call(this);
  return this;
};
2491
/**
 * The WebSocket fall back needs to append the flash container to the body
 * element, so we need to make sure we have access to it. Or defer the call
 * until we are sure there is a body element.
 *
 * @param {Socket} socket The socket instance that needs a transport
 * @param {Function} fn The callback
 * @api private
 */
2501
Flashsocket.prototype.ready = function (socket, fn) {
  function init () {
    var options = socket.options
      , path = [
            'http' + (options.secure ? 's' : '') + ':/'
          , options.host + ':' + options.port
          , options.resource
          , 'static/flashsocket'
          , 'WebSocketMain' + (socket.isXDomain() ? 'Insecure' : '') + '.swf'
        ];
2512
    // Only start downloading the swf file when the checked that this browser
    // actually supports it
    if (!Flashsocket.loaded) {
      if (typeof WEB_SOCKET_SWF_LOCATION === 'undefined') {
        // Set the correct file based on the XDomain settings
        WEB_SOCKET_SWF_LOCATION = path.join('/');
      }
2520
      WebSocket.__initialize();
      Flashsocket.loaded = true;
    }
2524
    fn.call(self);
  }
2527
  var self = this;
  if (document.body) return init();
2530
  io.util.load(init);
};
2533
/**
 * Check if the FlashSocket transport is supported as it requires that the Adobe
 * Flash Player plug-in version `10.0.0` or greater is installed. And also check if
 * the polyfill is correctly loaded.
 *
 * @returns {Boolean}
 * @api public
 */
2542
Flashsocket.check = function () {
  if (
      typeof WebSocket == 'undefined'
    || !('__initialize' in WebSocket) || !swfobject
  ) return false;
2548
  return swfobject.getFlashPlayerVersion().major >= 1;
};
2551
/**
 * Check if the FlashSocket transport can be used as cross domain / cross origin 
 * transport. Because we can't see which type (secure or insecure) of .swf is used
 * we will just return true.
 *
 * @returns {Boolean}
 * @api public
 */
2560
Flashsocket.xdomainCheck = function () {
  return true;
};
2564
/**
 * Disable AUTO_INITIALIZATION
 */
2568
if (typeof window != 'undefined') {
  WEB_SOCKET_DISABLE_AUTO_INITIALIZATION = true;
}
2572
/**
 * Add the transport to your public io.transports array.
 *
 * @api private
 */
2578
io.transports.push('flashsocket');
2580})(
  'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
2583);
2584/*	SWFObject v2.2 <http://code.google.com/p/swfobject/> 
is released under the MIT License <http://www.opensource.org/licenses/mit-license.php> 
2586*/
2587var swfobject=function(){var D="undefined",r="object",S="Shockwave Flash",W="ShockwaveFlash.ShockwaveFlash",q="application/x-shockwave-flash",R="SWFObjectExprInst",x="onreadystatechange",O=window,j=document,t=navigator,T=false,U=[h],o=[],N=[],I=[],l,Q,E,B,J=false,a=false,n,G,m=true,M=function(){var aa=typeof j.getElementById!=D&&typeof j.getElementsByTagName!=D&&typeof j.createElement!=D,ah=t.userAgent.toLowerCase(),Y=t.platform.toLowerCase(),ae=Y?/win/.test(Y):/win/.test(ah),ac=Y?/mac/.test(Y):/mac/.test(ah),af=/webkit/.test(ah)?parseFloat(ah.replace(/^.*webkit\/(\d+(\.\d+)?).*$/,"$1")):false,X=!+"\v1",ag=[0,0,0],ab=null;if(typeof t.plugins!=D&&typeof t.plugins[S]==r){ab=t.plugins[S].description;if(ab&&!(typeof t.mimeTypes!=D&&t.mimeTypes[q]&&!t.mimeTypes[q].enabledPlugin)){T=true;X=false;ab=ab.replace(/^.*\s+(\S+\s+\S+$)/,"$1");ag[0]=parseInt(ab.replace(/^(.*)\..*$/,"$1"),10);ag[1]=parseInt(ab.replace(/^.*\.(.*)\s.*$/,"$1"),10);ag[2]=/[a-zA-Z]/.test(ab)?parseInt(ab.replace(/^.*[a-zA-Z]+(.*)$/,"$1"),10):0}}else{if(typeof O.ActiveXObject!=D){try{var ad=new ActiveXObject(W);if(ad){ab=ad.GetVariable("$version");if(ab){X=true;ab=ab.split(" ")[1].split(",");ag=[parseInt(ab[0],10),parseInt(ab[1],10),parseInt(ab[2],10)]}}}catch(Z){}}}return{w3:aa,pv:ag,wk:af,ie:X,win:ae,mac:ac}}(),k=function(){if(!M.w3){return}if((typeof j.readyState!=D&&j.readyState=="complete")||(typeof j.readyState==D&&(j.getElementsByTagName("body")[0]||j.body))){f()}if(!J){if(typeof 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swfobject){swfobject[X]=null}swfobject=null})}}();return{registerObject:function(ab,X,aa,Z){if(M.w3&&ab&&X){var Y={};Y.id=ab;Y.swfVersion=X;Y.expressInstall=aa;Y.callbackFn=Z;o[o.length]=Y;w(ab,false)}else{if(Z){Z({success:false,id:ab})}}},getObjectById:function(X){if(M.w3){return z(X)}},embedSWF:function(ab,ah,ae,ag,Y,aa,Z,ad,af,ac){var X={success:false,id:ah};if(M.w3&&!(M.wk&&M.wk<312)&&ab&&ah&&ae&&ag&&Y){w(ah,false);K(function(){ae+="";ag+="";var aj={};if(af&&typeof af===r){for(var al in af){aj[al]=af[al]}}aj.data=ab;aj.width=ae;aj.height=ag;var am={};if(ad&&typeof ad===r){for(var ak in ad){am[ak]=ad[ak]}}if(Z&&typeof Z===r){for(var ai in Z){if(typeof am.flashvars!=D){am.flashvars+="&"+ai+"="+Z[ai]}else{am.flashvars=ai+"="+Z[ai]}}}if(F(Y)){var an=u(aj,am,ah);if(aj.id==ah){w(ah,true)}X.success=true;X.ref=an}else{if(aa&&A()){aj.data=aa;P(aj,am,ah,ac);return}else{w(ah,true)}}if(ac){ac(X)}})}else{if(ac){ac(X)}}},switchOffAutoHideShow:function(){m=false},ua:M,getFlashPlayerVersion:function(){return{major:M.pv[0],minor:M.pv[1],release:M.pv[2]}},hasFlashPlayerVersion:F,createSWF:function(Z,Y,X){if(M.w3){return u(Z,Y,X)}else{return undefined}},showExpressInstall:function(Z,aa,X,Y){if(M.w3&&A()){P(Z,aa,X,Y)}},removeSWF:function(X){if(M.w3){y(X)}},createCSS:function(aa,Z,Y,X){if(M.w3){v(aa,Z,Y,X)}},addDomLoadEvent:K,addLoadEvent:s,getQueryParamValue:function(aa){var Z=j.location.search||j.location.hash;if(Z){if(/\?/.test(Z)){Z=Z.split("?")[1]}if(aa==null){return L(Z)}var Y=Z.split("&");for(var X=0;X<Y.length;X++){if(Y[X].substring(0,Y[X].indexOf("="))==aa){return L(Y[X].substring((Y[X].indexOf("=")+1)))}}}return""},expressInstallCallback:function(){if(a){var X=c(R);if(X&&l){X.parentNode.replaceChild(l,X);if(Q){w(Q,true);if(M.ie&&M.win){l.style.display="block"}}if(E){E(B)}}a=false}}}}();// Copyright: Hiroshi Ichikawa <http://gimite.net/en/>
2588// License: New BSD License
2589// Reference: http://dev.w3.org/html5/websockets/
2590// Reference: http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol
2591
2592(function() {

if (window.WebSocket) return;
2595
var console = window.console;
if (!console || !console.log || !console.error) {
  console = {log: function(){ }, error: function(){ }};
}

if (!swfobject.hasFlashPlayerVersion("10.0.0")) {
  console.error("Flash Player >= 10.0.0 is required.");
  return;
}
if (location.protocol == "file:") {
  console.error(
    "WARNING: web-socket-js doesn't work in file:///... URL " +
    "unless you set Flash Security Settings properly. " +
    "Open the page via Web server i.e. http://...");
}
2611
/**
 * This class represents a faux web socket.
 * @param {string} url
 * @param {array or string} protocols
 * @param {string} proxyHost
 * @param {int} proxyPort
 * @param {string} headers
 */
WebSocket = function(url, protocols, proxyHost, proxyPort, headers) {
  var self = this;
  self.__id = WebSocket.__nextId++;
  WebSocket.__instances[self.__id] = self;
  self.readyState = WebSocket.CONNECTING;
  self.bufferedAmount = 0;
  self.__events = {};
  if (!protocols) {
    protocols = [];
  } else if (typeof protocols == "string") {
    protocols = [protocols];
  }
  // Uses setTimeout() to make sure __createFlash() runs after the caller sets ws.onopen etc.
  // Otherwise, when onopen fires immediately, onopen is called before it is set.
  setTimeout(function() {
    WebSocket.__addTask(function() {
      WebSocket.__flash.create(
          self.__id, url, protocols, proxyHost || null, proxyPort || 0, headers || null);
    });
  }, 0);
};
2641
/**
 * Send data to the web socket.
 * @param {string} data  The data to send to the socket.
 * @return {boolean}  True for success, false for failure.
 */
WebSocket.prototype.send = function(data) {
  if (this.readyState == WebSocket.CONNECTING) {
    throw "INVALID_STATE_ERR: Web Socket connection has not been established";
  }
  // We use encodeURIComponent() here, because FABridge doesn't work if
  // the argument includes some characters. We don't use escape() here
  // because of this:
  // https://developer.mozilla.org/en/Core_JavaScript_1.5_Guide/Functions#escape_and_unescape_Functions
  // But it looks decodeURIComponent(encodeURIComponent(s)) doesn't
  // preserve all Unicode characters either e.g. "\uffff" in Firefox.
  // Note by wtritch: Hopefully this will not be necessary using ExternalInterface.  Will require
  // additional testing.
  var result = WebSocket.__flash.send(this.__id, encodeURIComponent(data));
  if (result < 0) { // success
    return true;
  } else {
    this.bufferedAmount += result;
    return false;
  }
};
2667
/**
 * Close this web socket gracefully.
 */
WebSocket.prototype.close = function() {
  if (this.readyState == WebSocket.CLOSED || this.readyState == WebSocket.CLOSING) {
    return;
  }
  this.readyState = WebSocket.CLOSING;
  WebSocket.__flash.close(this.__id);
};
2678
/**
 * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
 *
 * @param {string} type
 * @param {function} listener
 * @param {boolean} useCapture
 * @return void
 */
WebSocket.prototype.addEventListener = function(type, listener, useCapture) {
  if (!(type in this.__events)) {
    this.__events[type] = [];
  }
  this.__events[type].push(listener);
};
2693
/**
 * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
 *
 * @param {string} type
 * @param {function} listener
 * @param {boolean} useCapture
 * @return void
 */
WebSocket.prototype.removeEventListener = function(type, listener, useCapture) {
  if (!(type in this.__events)) return;
  var events = this.__events[type];
  for (var i = events.length - 1; i >= 0; --i) {
    if (events[i] === listener) {
      events.splice(i, 1);
      break;
    }
  }
};
2712
/**
 * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
 *
 * @param {Event} event
 * @return void
 */
WebSocket.prototype.dispatchEvent = function(event) {
  var events = this.__events[event.type] || [];
  for (var i = 0; i < events.length; ++i) {
    events[i](event);
  }
  var handler = this["on" + event.type];
  if (handler) handler(event);
};
2727
/**
 * Handles an event from Flash.
 * @param {Object} flashEvent
 */
WebSocket.prototype.__handleEvent = function(flashEvent) {
  if ("readyState" in flashEvent) {
    this.readyState = flashEvent.readyState;
  }
  if ("protocol" in flashEvent) {
    this.protocol = flashEvent.protocol;
  }
  
  var jsEvent;
  if (flashEvent.type == "open" || flashEvent.type == "error") {
    jsEvent = this.__createSimpleEvent(flashEvent.type);
  } else if (flashEvent.type == "close") {
    // TODO implement jsEvent.wasClean
    jsEvent = this.__createSimpleEvent("close");
  } else if (flashEvent.type == "message") {
    var data = decodeURIComponent(flashEvent.message);
    jsEvent = this.__createMessageEvent("message", data);
  } else {
    throw "unknown event type: " + flashEvent.type;
  }
  
  this.dispatchEvent(jsEvent);
};

WebSocket.prototype.__createSimpleEvent = function(type) {
  if (document.createEvent && window.Event) {
    var event = document.createEvent("Event");
    event.initEvent(type, false, false);
    return event;
  } else {
    return {type: type, bubbles: false, cancelable: false};
  }
};

WebSocket.prototype.__createMessageEvent = function(type, data) {
  if (document.createEvent && window.MessageEvent && !window.opera) {
    var event = document.createEvent("MessageEvent");
    event.initMessageEvent("message", false, false, data, null, null, window, null);
    return event;
  } else {
    // IE and Opera, the latter one truncates the data parameter after any 0x00 bytes.
    return {type: type, data: data, bubbles: false, cancelable: false};
  }
};

/**
 * Define the WebSocket readyState enumeration.
 */
WebSocket.CONNECTING = 0;
WebSocket.OPEN = 1;
WebSocket.CLOSING = 2;
WebSocket.CLOSED = 3;
2784
WebSocket.__flash = null;
WebSocket.__instances = {};
WebSocket.__tasks = [];
WebSocket.__nextId = 0;

/**
 * Load a new flash security policy file.
 * @param {string} url
 */
WebSocket.loadFlashPolicyFile = function(url){
  WebSocket.__addTask(function() {
    WebSocket.__flash.loadManualPolicyFile(url);
  });
};
2799
/**
 * Loads WebSocketMain.swf and creates WebSocketMain object in Flash.
 */
WebSocket.__initialize = function() {
  if (WebSocket.__flash) return;
  
  if (WebSocket.__swfLocation) {
    // For backword compatibility.
    window.WEB_SOCKET_SWF_LOCATION = WebSocket.__swfLocation;
  }
  if (!window.WEB_SOCKET_SWF_LOCATION) {
    console.error("[WebSocket] set WEB_SOCKET_SWF_LOCATION to location of WebSocketMain.swf");
    return;
  }
  var container = document.createElement("div");
  container.id = "webSocketContainer";
  // Hides Flash box. We cannot use display: none or visibility: hidden because it prevents
  // Flash from loading at least in IE. So we move it out of the screen at (-100, -100).
  // But this even doesn't work with Flash Lite (e.g. in Droid Incredible). So with Flash
  // Lite, we put it at (0, 0). This shows 1x1 box visible at left-top corner but this is
  // the best we can do as far as we know now.
  container.style.position = "absolute";
  if (WebSocket.__isFlashLite()) {
    container.style.left = "0px";
    container.style.top = "0px";
  } else {
    container.style.left = "-100px";
    container.style.top = "-100px";
  }
  var holder = document.createElement("div");
  holder.id = "webSocketFlash";
  container.appendChild(holder);
  document.body.appendChild(container);
  // See this article for hasPriority:
  // http://help.adobe.com/en_US/as3/mobile/WS4bebcd66a74275c36cfb8137124318eebc6-7ffd.html
  swfobject.embedSWF(
    WEB_SOCKET_SWF_LOCATION,
    "webSocketFlash",
    "1" /* width */,
    "1" /* height */,
    "10.0.0" /* SWF version */,
    null,
    null,
    {hasPriority: true, swliveconnect : true, allowScriptAccess: "always"},
    null,
    function(e) {
      if (!e.success) {
        console.error("[WebSocket] swfobject.embedSWF failed");
      }
    });
};

/**
 * Called by Flash to notify JS that it's fully loaded and ready
 * for communication.
 */
WebSocket.__onFlashInitialized = function() {
  // We need to set a timeout here to avoid round-trip calls
  // to flash during the initialization process.
  setTimeout(function() {
    WebSocket.__flash = document.getElementById("webSocketFlash");
    WebSocket.__flash.setCallerUrl(location.href);
    WebSocket.__flash.setDebug(!!window.WEB_SOCKET_DEBUG);
    for (var i = 0; i < WebSocket.__tasks.length; ++i) {
      WebSocket.__tasks[i]();
    }
    WebSocket.__tasks = [];
  }, 0);
};

/**
 * Called by Flash to notify WebSockets events are fired.
 */
WebSocket.__onFlashEvent = function() {
  setTimeout(function() {
    try {
      // Gets events using receiveEvents() instead of getting it from event object
      // of Flash event. This is to make sure to keep message order.
      // It seems sometimes Flash events don't arrive in the same order as they are sent.
      var events = WebSocket.__flash.receiveEvents();
      for (var i = 0; i < events.length; ++i) {
        WebSocket.__instances[events[i].webSocketId].__handleEvent(events[i]);
      }
    } catch (e) {
      console.error(e);
    }
  }, 0);
  return true;
};

// Called by Flash.
WebSocket.__log = function(message) {
  console.log(decodeURIComponent(message));
};

// Called by Flash.
WebSocket.__error = function(message) {
  console.error(decodeURIComponent(message));
};

WebSocket.__addTask = function(task) {
  if (WebSocket.__flash) {
    task();
  } else {
    WebSocket.__tasks.push(task);
  }
};

/**
 * Test if the browser is running flash lite.
 * @return {boolean} True if flash lite is running, false otherwise.
 */
WebSocket.__isFlashLite = function() {
  if (!window.navigator || !window.navigator.mimeTypes) {
    return false;
  }
  var mimeType = window.navigator.mimeTypes["application/x-shockwave-flash"];
  if (!mimeType || !mimeType.enabledPlugin || !mimeType.enabledPlugin.filename) {
    return false;
  }
  return mimeType.enabledPlugin.filename.match(/flashlite/i) ? true : false;
};

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

2935})();
2936
2937/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
2942
2943(function (exports, io, global) {
2944
/**
 * Expose constructor.
 *
 * @api public
 */

exports.XHR = XHR;
2952
/**
 * XHR constructor
 *
 * @costructor
 * @api public
 */
2959
function XHR (socket) {
  if (!socket) return;
2962
  io.Transport.apply(this, arguments);
  this.sendBuffer = [];
};
2966
/**
 * Inherits from Transport.
 */
2970
io.util.inherit(XHR, io.Transport);
2972
/**
 * Establish a connection
 *
 * @returns {Transport}
 * @api public
 */
2979
XHR.prototype.open = function () {
  this.socket.setBuffer(false);
  this.onOpen();
  this.get();
2984
  // we need to make sure the request succeeds since we have no indication
  // whether the request opened or not until it succeeded.
  this.setCloseTimeout();
2988
  return this;
};
2991
/**
 * Check if we need to send data to the Socket.IO server, if we have data in our
 * buffer we encode it and forward it to the `post` method.
 *
 * @api private
 */
2998
XHR.prototype.payload = function (payload) {
  var msgs = [];
3001
  for (var i = 0, l = payload.length; i < l; i++) {
    msgs.push(io.parser.encodePacket(payload[i]));
  }
3005
  this.send(io.parser.encodePayload(msgs));
};
3008
/**
 * Send data to the Socket.IO server.
 *
 * @param data The message
 * @returns {Transport}
 * @api public
 */
3016
XHR.prototype.send = function (data) {
  this.post(data);
  return this;
};
3021
/**
 * Posts a encoded message to the Socket.IO server.
 *
 * @param {String} data A encoded message.
 * @api private
 */
3028
function empty () { };
3030
XHR.prototype.post = function (data) {
  var self = this;
  this.socket.setBuffer(true);
3034
  function stateChange () {
    if (this.readyState == 4) {
      this.onreadystatechange = empty;
      self.posting = false;
3039
      if (this.status == 200){
        self.socket.setBuffer(false);
      } else {
        self.onClose();
      }
    }
  }
3047
  function onload () {
    this.onload = empty;
    self.socket.setBuffer(false);
  };
3052
  this.sendXHR = this.request('POST');
3054
  if (global.XDomainRequest && this.sendXHR instanceof XDomainRequest) {
    this.sendXHR.onload = this.sendXHR.onerror = onload;
  } else {
    this.sendXHR.onreadystatechange = stateChange;
  }
3060
  this.sendXHR.send(data);
};
3063
/**
 * Disconnects the established `XHR` connection.
 *
 * @returns {Transport} 
 * @api public
 */
3070
XHR.prototype.close = function () {
  this.onClose();
  return this;
};
3075
/**
 * Generates a configured XHR request
 *
 * @param {String} url The url that needs to be requested.
 * @param {String} method The method the request should use.
 * @returns {XMLHttpRequest}
 * @api private
 */
3084
XHR.prototype.request = function (method) {
  var req = io.util.request(this.socket.isXDomain())
    , query = io.util.query(this.socket.options.query, 't=' + +new Date);
3088
  req.open(method || 'GET', this.prepareUrl() + query, true);
3090
  if (method == 'POST') {
    try {
      if (req.setRequestHeader) {
        req.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
      } else {
        // XDomainRequest
        req.contentType = 'text/plain';
      }
    } catch (e) {}
  }
3101
  return req;
};
3104
/**
 * Returns the scheme to use for the transport URLs.
 *
 * @api private
 */
3110
XHR.prototype.scheme = function () {
  return this.socket.options.secure ? 'https' : 'http';
};
3114
/**
 * Check if the XHR transports are supported
 *
 * @param {Boolean} xdomain Check if we support cross domain requests.
 * @returns {Boolean}
 * @api public
 */
3122
XHR.check = function (socket, xdomain) {
  try {
    if (io.util.request(xdomain)) {
      return true;
    }
  } catch(e) {}
3129
  return false;
};
3132
/**
 * Check if the XHR transport supports corss domain requests.
 * 
 * @returns {Boolean}
 * @api public
 */
3139
XHR.xdomainCheck = function () {
  return XHR.check(null, true);
};
3143
3144})(
  'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
, this
3148);
3149
3150/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
3155
3156(function (exports, io) {
3157
/**
 * Expose constructor.
 */
3161
exports.htmlfile = HTMLFile;
3163
/**
 * The HTMLFile transport creates a `forever iframe` based transport
 * for Internet Explorer. Regular forever iframe implementations will 
 * continuously trigger the browsers buzy indicators. If the forever iframe
 * is created inside a `htmlfile` these indicators will not be trigged.
 *
 * @constructor
 * @extends {io.Transport.XHR}
 * @api public
 */
3174
function HTMLFile (socket) {
  io.Transport.XHR.apply(this, arguments);
};
3178
/**
 * Inherits from XHR transport.
 */
3182
io.util.inherit(HTMLFile, io.Transport.XHR);
3184
/**
 * Transport name
 *
 * @api public
 */
3190
HTMLFile.prototype.name = 'htmlfile';
3192
/**
 * Creates a new ActiveX `htmlfile` with a forever loading iframe
 * that can be used to listen to messages. Inside the generated
 * `htmlfile` a reference will be made to the HTMLFile transport.
 *
 * @api private
 */
3200
HTMLFile.prototype.get = function () {
  this.doc = new ActiveXObject('htmlfile');
  this.doc.open();
  this.doc.write('<html></html>');
  this.doc.close();
  this.doc.parentWindow.s = this;
3207
  var iframeC = this.doc.createElement('div');
  iframeC.className = 'socketio';
3210
  this.doc.body.appendChild(iframeC);
  this.iframe = this.doc.createElement('iframe');
3213
  iframeC.appendChild(this.iframe);
3215
  var self = this
    , query = io.util.query(this.socket.options.query, 't='+ +new Date);
3218
  this.iframe.src = this.prepareUrl() + query;
3220
  io.util.on(window, 'unload', function () {
    self.destroy();
  });
};
3225
/**
 * The Socket.IO server will write script tags inside the forever
 * iframe, this function will be used as callback for the incoming
 * information.
 *
 * @param {String} data The message
 * @param {document} doc Reference to the context
 * @api private
 */
3235
HTMLFile.prototype._ = function (data, doc) {
  this.onData(data);
  try {
    var script = doc.getElementsByTagName('script')[0];
    script.parentNode.removeChild(script);
  } catch (e) { }
};
3243
/**
 * Destroy the established connection, iframe and `htmlfile`.
 * And calls the `CollectGarbage` function of Internet Explorer
 * to release the memory.
 *
 * @api private
 */
3251
HTMLFile.prototype.destroy = function () {
  if (this.iframe){
    try {
      this.iframe.src = 'about:blank';
    } catch(e){}
3257
    this.doc = null;
    this.iframe.parentNode.removeChild(this.iframe);
    this.iframe = null;
3261
    CollectGarbage();
  }
};
3265
/**
 * Disconnects the established connection.
 *
 * @returns {Transport} Chaining.
 * @api public
 */
3272
HTMLFile.prototype.close = function () {
  this.destroy();
  return io.Transport.XHR.prototype.close.call(this);
};
3277
/**
 * Checks if the browser supports this transport. The browser
 * must have an `ActiveXObject` implementation.
 *
 * @return {Boolean}
 * @api public
 */
3285
HTMLFile.check = function () {
  if ('ActiveXObject' in window){
    try {
      var a = new ActiveXObject('htmlfile');
      return a && io.Transport.XHR.check();
    } catch(e){}
  }
  return false;
};
3295
/**
 * Check if cross domain requests are supported.
 *
 * @returns {Boolean}
 * @api public
 */
3302
HTMLFile.xdomainCheck = function () {
  // we can probably do handling for sub-domains, we should
  // test that it's cross domain but a subdomain here
  return false;
};
3308
/**
 * Add the transport to your public io.transports array.
 *
 * @api private
 */
3314
io.transports.push('htmlfile');
3316
3317})(
  'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
3320);
3321
3322/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
3327
3328(function (exports, io, global) {
3329
/**
 * Expose constructor.
 */
3333
exports['xhr-polling'] = XHRPolling;
3335
/**
 * The XHR-polling transport uses long polling XHR requests to create a
 * "persistent" connection with the server.
 *
 * @constructor
 * @api public
 */
3343
function XHRPolling () {
  io.Transport.XHR.apply(this, arguments);
};
3347
/**
 * Inherits from XHR transport.
 */
3351
io.util.inherit(XHRPolling, io.Transport.XHR);
3353
/**
 * Merge the properties from XHR transport
 */
3357
io.util.merge(XHRPolling, io.Transport.XHR);
3359
/**
 * Transport name
 *
 * @api public
 */
3365
XHRPolling.prototype.name = 'xhr-polling';
3367
/** 
 * Establish a connection, for iPhone and Android this will be done once the page
 * is loaded.
 *
 * @returns {Transport} Chaining.
 * @api public
 */
3375
XHRPolling.prototype.open = function () {
  var self = this;
3378
  io.Transport.XHR.prototype.open.call(self);
  return false;
};
3382
/**
 * Starts a XHR request to wait for incoming messages.
 *
 * @api private
 */
3388
function empty () {};
3390
XHRPolling.prototype.get = function () {
  if (!this.open) return;
3393
  var self = this;
3395
  function stateChange () {
    if (this.readyState == 4) {
      this.onreadystatechange = empty;
3399
      if (this.status == 200) {
        self.onData(this.responseText);
        self.get();
      } else {
        self.onClose();
      }
    }
  };
3408
  function onload () {
    this.onload = empty;
    self.onData(this.responseText);
    self.get();
  };
3414
  this.xhr = this.request();
3416
  if (global.XDomainRequest && this.xhr instanceof XDomainRequest) {
    this.xhr.onload = this.xhr.onerror = onload;
  } else {
    this.xhr.onreadystatechange = stateChange;
  }
3422
  this.xhr.send(null);
};
3425
/**
 * Handle the unclean close behavior.
 *
 * @api private
 */
3431
XHRPolling.prototype.onClose = function () {
  io.Transport.XHR.prototype.onClose.call(this);
3434
  if (this.xhr) {
    this.xhr.onreadystatechange = this.xhr.onload = empty;
    try {
      this.xhr.abort();
    } catch(e){}
    this.xhr = null;
  }
};
3443
/**
 * Webkit based browsers show a infinit spinner when you start a XHR request
 * before the browsers onload event is called so we need to defer opening of
 * the transport until the onload event is called. Wrapping the cb in our
 * defer method solve this.
 *
 * @param {Socket} socket The socket instance that needs a transport
 * @param {Function} fn The callback
 * @api private
 */
3454
XHRPolling.prototype.ready = function (socket, fn) {
  var self = this;
3457
  io.util.defer(function () {
    fn.call(self);
  });
};
3462
/**
 * Add the transport to your public io.transports array.
 *
 * @api private
 */
3468
io.transports.push('xhr-polling');
3470
3471})(
  'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
, this
3475);
3476
3477/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
3482
3483(function (exports, io) {
3484
/**
 * Expose constructor.
 */
3488
exports['jsonp-polling'] = JSONPPolling;
3490
/**
 * The JSONP transport creates an persistent connection by dynamically
 * inserting a script tag in the page. This script tag will receive the
 * information of the Socket.IO server. When new information is received
 * it creates a new script tag for the new data stream.
 *
 * @constructor
 * @extends {io.Transport.xhr-polling}
 * @api public
 */
3501
function JSONPPolling (socket) {
  io.Transport['xhr-polling'].apply(this, arguments);
3504
  this.index = io.j.length;
3506
  var self = this;
3508
  io.j.push(function (msg) {
    self._(msg);
  });
};
3513
/**
 * Inherits from XHR polling transport.
 */
3517
io.util.inherit(JSONPPolling, io.Transport['xhr-polling']);
3519
/**
 * Transport name
 *
 * @api public
 */
3525
JSONPPolling.prototype.name = 'jsonp-polling';
3527
/**
 * Posts a encoded message to the Socket.IO server using an iframe.
 * The iframe is used because script tags can create POST based requests.
 * The iframe is positioned outside of the view so the user does not
 * notice it's existence.
 *
 * @param {String} data A encoded message.
 * @api private
 */
3537
JSONPPolling.prototype.post = function (data) {
  var self = this
    , query = io.util.query(
           this.socket.options.query
        , 't='+ (+new Date) + '&i=' + this.index
      );
3544
  if (!this.form) {
    var form = document.createElement('FORM')
      , area = document.createElement('TEXTAREA')
      , id = this.iframeId = 'socketio_iframe_' + this.index
      , iframe;
3550
    form.className = 'socketio';
    form.style.position = 'absolute';
    form.style.top = '-1000px';
    form.style.left = '-1000px';
    form.target = id;
    form.method = 'POST';
    form.setAttribute('accept-charset', 'utf-8');
    area.name = 'd';
    form.appendChild(area);
    document.body.appendChild(form);
3561
    this.form = form;
    this.area = area;
  }
3565
  this.form.action = this.prepareUrl() + query;
3567
  function complete () {
    initIframe();
    self.socket.setBuffer(false);
  };
3572
  function initIframe () {
    if (self.iframe) {
      self.form.removeChild(self.iframe);
    }
3577
    try {
      // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
      iframe = document.createElement('<iframe name="'+ self.iframeId +'">');
    } catch (e) {
      iframe = document.createElement('iframe');
      iframe.name = self.iframeId;
    }
3585
    iframe.id = self.iframeId;
3587
    self.form.appendChild(iframe);
    self.iframe = iframe;
  };
3591
  initIframe();
3593
  this.area.value = data;
3595
  try {
    this.form.submit();
  } catch(e) {}
3599
  if (this.iframe.attachEvent) {
    iframe.onreadystatechange = function () {
      if (self.iframe.readyState == 'complete') {
        complete();
      }
    };
  } else {
    this.iframe.onload = complete;
  }
3609
  this.socket.setBuffer(true);
};

/**
 * Creates a new JSONP poll that can be used to listen
 * for messages from the Socket.IO server.
 *
 * @api private
 */
3619
JSONPPolling.prototype.get = function () {
  var self = this
    , script = document.createElement('SCRIPT')
    , query = io.util.query(
           this.socket.options.query
        , 't='+ (+new Date) + '&i=' + this.index
      );
3627
  if (this.script) {
    this.script.parentNode.removeChild(this.script);
    this.script = null;
  }
3632
  script.async = true;
  script.src = this.prepareUrl() + query;
  script.onerror = function () {
    self.onClose();
  };
3638
  var insertAt = document.getElementsByTagName('script')[0]
  insertAt.parentNode.insertBefore(script, insertAt);
  this.script = script;
};
3643
/**
 * Callback function for the incoming message stream from the Socket.IO server.
 *
 * @param {String} data The message
 * @api private
 */
3650
JSONPPolling.prototype._ = function (msg) {
  this.onData(msg);
  if (this.open) {
    this.get();
  }
  return this;
};
3658
/**
 * Checks if browser supports this transport.
 *
 * @return {Boolean}
 * @api public
 */
3665
JSONPPolling.check = function () {
  return true;
};
3669
/**
 * Check if cross domain requests are supported
 *
 * @returns {Boolean}
 * @api public
 */
3676
JSONPPolling.xdomainCheck = function () {
  return true;
};
3680
/**
 * Add the transport to your public io.transports array.
 *
 * @api private
 */
3686
io.transports.push('jsonp-polling');
3688
3689})(
  'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
3692);
1	`/! Socket.IO.js build:0.7.9, development. Copyright(c) 2011 LearnBoost <dev@learnboost.com> MIT Licensed /`
2
3	`/**`
4	`* socket.io`
5	`* Copyright(c) 2011 LearnBoost <dev@learnboost.com>`
6	`* MIT Licensed`
7	`*/`
8
9	`(function (exports) {`
10
11	`/**`
12	`* IO namespace.`
13	`*`
14	`* @namespace`
15	`*/`
16
17	`var io = exports;`
18
19	`/**`
20	`* Socket.IO version`
21	`*`
22	`* @api public`
23	`*/`
24
25	`io.version = '0.7.9';`
26
27	`/**`
28	`* Protocol implemented.`
29	`*`
30	`* @api public`
31	`*/`
32
33	`io.protocol = 1;`
34
35	`/**`
36	`* Available transports, these will be populated with the available transports`
37	`*`
38	`* @api public`
39	`*/`
40