client.js

(function UMDish(name, context, definition) {
  context[name] = definition.call(context);
  if (typeof module !== "undefined" && module.exports) {
    module.exports = context[name];
  } else if (typeof define === "function" && define.amd) {
    define(function reference() { return context[name]; });
  }
})("Primus", this, function wrapper() {
  var define, module, exports
    , Primus = (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);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.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){
'use strict';

/**
 * Create a function that will cleanup the instance.
 *
 * @param {Array|String} keys Properties on the instance that needs to be cleared.
 * @param {Object} options Additional configuration.
 * @returns {Function} Destroy function
 * @api public
 */
module.exports = function demolish(keys, options) {
  var split = /[, ]+/;

  options = options ||  {};
  keys = keys || [];

  if ('string' === typeof keys) keys = keys.split(split);

  /**
   * Run addition cleanup hooks.
   *
   * @param {String} key Name of the clean up hook to run.
   * @param {Mixed} selfie Reference to the instance we're cleaning up.
   * @api private
   */
  function run(key, selfie) {
    if (!options[key]) return;
    if ('string' === typeof options[key]) options[key] = options[key].split(split);
    if ('function' === typeof options[key]) return options[key].call(selfie);

    for (var i = 0, type, what; i < options[key].length; i++) {
      what = options[key][i];
      type = typeof what;

      if ('function' === type) {
        what.call(selfie);
      } else if ('string' === type && 'function' === typeof selfie[what]) {
        selfie[what]();
      }
    }
  }

  /**
   * Destroy the instance completely and clean up all the existing references.
   *
   * @returns {Boolean}
   * @api public
   */
  return function destroy() {
    var selfie = this
      , i = 0
      , prop;

    if (selfie[keys[0]] === null) return false;
    run('before', selfie);

    for (; i < keys.length; i++) {
      prop = keys[i];

      if (selfie[prop]) {
        if ('function' === typeof selfie[prop].destroy) selfie[prop].destroy();
        selfie[prop] = null;
      }
    }

    if (selfie.emit) selfie.emit('destroy');
    run('after', selfie);

    return true;
  };
};

},{}],2:[function(_dereq_,module,exports){
'use strict';

/**
 * Returns a function that when invoked executes all the listeners of the
 * given event with the given arguments.
 *
 * @returns {Function} The function that emits all the things.
 * @api public
 */
module.exports = function emits() {
  var self = this
    , parser;

  for (var i = 0, l = arguments.length, args = new Array(l); i < l; i++) {
    args[i] = arguments[i];
  }

  //
  // If the last argument is a function, assume that it's a parser.
  //
  if ('function' !== typeof args[args.length - 1]) return function emitter() {
    for (var i = 0, l = arguments.length, arg = new Array(l); i < l; i++) {
      arg[i] = arguments[i];
    }

    return self.emit.apply(self, args.concat(arg));
  };

  parser = args.pop();

  /**
   * The actual function that emits the given event. It returns a boolean
   * indicating if the event was emitted.
   *
   * @returns {Boolean}
   * @api public
   */
  return function emitter() {
    for (var i = 0, l = arguments.length, arg = new Array(l + 1); i < l; i++) {
      arg[i + 1] = arguments[i];
    }

    /**
     * Async completion method for the parser.
     *
     * @param {Error} err Optional error when parsing failed.
     * @param {Mixed} returned Emit instructions.
     * @api private
     */
    arg[0] = function next(err, returned) {
      if (err) return self.emit('error', err);

      arg = returned === undefined
        ? arg.slice(1) : returned === null
          ? [] : returned;

      self.emit.apply(self, args.concat(arg));
    };

    parser.apply(self, arg);
    return true;
  };
};

},{}],3:[function(_dereq_,module,exports){
'use strict';

//
// We store our EE objects in a plain object whose properties are event names.
// If `Object.create(null)` is not supported we prefix the event names with a
// `~` to make sure that the built-in object properties are not overridden or
// used as an attack vector.
// We also assume that `Object.create(null)` is available when the event name
// is an ES6 Symbol.
//
var prefix = typeof Object.create !== 'function' ? '~' : false;

/**
 * Representation of a single EventEmitter function.
 *
 * @param {Function} fn Event handler to be called.
 * @param {Mixed} context Context for function execution.
 * @param {Boolean} once Only emit once
 * @api private
 */
function EE(fn, context, once) {
  this.fn = fn;
  this.context = context;
  this.once = once || false;
}

/**
 * Minimal EventEmitter interface that is molded against the Node.js
 * EventEmitter interface.
 *
 * @constructor
 * @api public
 */
function EventEmitter() { /* Nothing to set */ }

/**
 * Holds the assigned EventEmitters by name.
 *
 * @type {Object}
 * @private
 */
EventEmitter.prototype._events = undefined;

/**
 * Return a list of assigned event listeners.
 *
 * @param {String} event The events that should be listed.
 * @param {Boolean} exists We only need to know if there are listeners.
 * @returns {Array|Boolean}
 * @api public
 */
EventEmitter.prototype.listeners = function listeners(event, exists) {
  var evt = prefix ? prefix + event : event
    , available = this._events && this._events[evt];

  if (exists) return !!available;
  if (!available) return [];
  if (available.fn) return [available.fn];

  for (var i = 0, l = available.length, ee = new Array(l); i < l; i++) {
    ee[i] = available[i].fn;
  }

  return ee;
};

/**
 * Emit an event to all registered event listeners.
 *
 * @param {String} event The name of the event.
 * @returns {Boolean} Indication if we've emitted an event.
 * @api public
 */
EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
  var evt = prefix ? prefix + event : event;

  if (!this._events || !this._events[evt]) return false;

  var listeners = this._events[evt]
    , len = arguments.length
    , args
    , i;

  if ('function' === typeof listeners.fn) {
    if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);

    switch (len) {
      case 1: return listeners.fn.call(listeners.context), true;
      case 2: return listeners.fn.call(listeners.context, a1), true;
      case 3: return listeners.fn.call(listeners.context, a1, a2), true;
      case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
      case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
      case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
    }

    for (i = 1, args = new Array(len -1); i < len; i++) {
      args[i - 1] = arguments[i];
    }

    listeners.fn.apply(listeners.context, args);
  } else {
    var length = listeners.length
      , j;

    for (i = 0; i < length; i++) {
      if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);

      switch (len) {
        case 1: listeners[i].fn.call(listeners[i].context); break;
        case 2: listeners[i].fn.call(listeners[i].context, a1); break;
        case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
        default:
          if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
            args[j - 1] = arguments[j];
          }

          listeners[i].fn.apply(listeners[i].context, args);
      }
    }
  }

  return true;
};

/**
 * Register a new EventListener for the given event.
 *
 * @param {String} event Name of the event.
 * @param {Functon} fn Callback function.
 * @param {Mixed} context The context of the function.
 * @api public
 */
EventEmitter.prototype.on = function on(event, fn, context) {
  var listener = new EE(fn, context || this)
    , evt = prefix ? prefix + event : event;

  if (!this._events) this._events = prefix ? {} : Object.create(null);
  if (!this._events[evt]) this._events[evt] = listener;
  else {
    if (!this._events[evt].fn) this._events[evt].push(listener);
    else this._events[evt] = [
      this._events[evt], listener
    ];
  }

  return this;
};

/**
 * Add an EventListener that's only called once.
 *
 * @param {String} event Name of the event.
 * @param {Function} fn Callback function.
 * @param {Mixed} context The context of the function.
 * @api public
 */
EventEmitter.prototype.once = function once(event, fn, context) {
  var listener = new EE(fn, context || this, true)
    , evt = prefix ? prefix + event : event;

  if (!this._events) this._events = prefix ? {} : Object.create(null);
  if (!this._events[evt]) this._events[evt] = listener;
  else {
    if (!this._events[evt].fn) this._events[evt].push(listener);
    else this._events[evt] = [
      this._events[evt], listener
    ];
  }

  return this;
};

/**
 * Remove event listeners.
 *
 * @param {String} event The event we want to remove.
 * @param {Function} fn The listener that we need to find.
 * @param {Mixed} context Only remove listeners matching this context.
 * @param {Boolean} once Only remove once listeners.
 * @api public
 */
EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
  var evt = prefix ? prefix + event : event;

  if (!this._events || !this._events[evt]) return this;

  var listeners = this._events[evt]
    , events = [];

  if (fn) {
    if (listeners.fn) {
      if (
           listeners.fn !== fn
        || (once && !listeners.once)
        || (context && listeners.context !== context)
      ) {
        events.push(listeners);
      }
    } else {
      for (var i = 0, length = listeners.length; i < length; i++) {
        if (
             listeners[i].fn !== fn
          || (once && !listeners[i].once)
          || (context && listeners[i].context !== context)
        ) {
          events.push(listeners[i]);
        }
      }
    }
  }

  //
  // Reset the array, or remove it completely if we have no more listeners.
  //
  if (events.length) {
    this._events[evt] = events.length === 1 ? events[0] : events;
  } else {
    delete this._events[evt];
  }

  return this;
};

/**
 * Remove all listeners or only the listeners for the specified event.
 *
 * @param {String} event The event want to remove all listeners for.
 * @api public
 */
EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
  if (!this._events) return this;

  if (event) delete this._events[prefix ? prefix + event : event];
  else this._events = prefix ? {} : Object.create(null);

  return this;
};

//
// Alias methods names because people roll like that.
//
EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
EventEmitter.prototype.addListener = EventEmitter.prototype.on;

//
// This function doesn't apply anymore.
//
EventEmitter.prototype.setMaxListeners = function setMaxListeners() {
  return this;
};

//
// Expose the prefix.
//
EventEmitter.prefixed = prefix;

//
// Expose the module.
//
if ('undefined' !== typeof module) {
  module.exports = EventEmitter;
}

},{}],4:[function(_dereq_,module,exports){
'use strict';

var has = Object.prototype.hasOwnProperty;

/**
 * Simple query string parser.
 *
 * @param {String} query The query string that needs to be parsed.
 * @returns {Object}
 * @api public
 */
function querystring(query) {
  var parser = /([^=?&]+)=([^&]*)/g
    , result = {}
    , part;

  //
  // Little nifty parsing hack, leverage the fact that RegExp.exec increments
  // the lastIndex property so we can continue executing this loop until we've
  // parsed all results.
  //
  for (;
    part = parser.exec(query);
    result[decodeURIComponent(part[1])] = decodeURIComponent(part[2])
  );

  return result;
}

/**
 * Transform a query string to an object.
 *
 * @param {Object} obj Object that should be transformed.
 * @param {String} prefix Optional prefix.
 * @returns {String}
 * @api public
 */
function querystringify(obj, prefix) {
  prefix = prefix || '';

  var pairs = [];

  //
  // Optionally prefix with a '?' if needed
  //
  if ('string' !== typeof prefix) prefix = '?';

  for (var key in obj) {
    if (has.call(obj, key)) {
      pairs.push(encodeURIComponent(key) +'='+ encodeURIComponent(obj[key]));
    }
  }

  return pairs.length ? prefix + pairs.join('&') : '';
}

//
// Expose the module.
//
exports.stringify = querystringify;
exports.parse = querystring;

},{}],5:[function(_dereq_,module,exports){
'use strict';

var EventEmitter = _dereq_('eventemitter3')
  , millisecond = _dereq_('millisecond')
  , destroy = _dereq_('demolish')
  , Tick = _dereq_('tick-tock')
  , one = _dereq_('one-time');

/**
 * Returns sane defaults about a given value.
 *
 * @param {String} name Name of property we want.
 * @param {Recovery} selfie Recovery instance that got created.
 * @param {Object} opts User supplied options we want to check.
 * @returns {Number} Some default value.
 * @api private
 */
function defaults(name, selfie, opts) {
  return millisecond(
    name in opts ? opts[name] : (name in selfie ? selfie[name] : Recovery[name])
  );
}

/**
 * Attempt to recover your connection with reconnection attempt.
 *
 * @constructor
 * @param {Object} options Configuration
 * @api public
 */
function Recovery(options) {
  var recovery = this;

  if (!(recovery instanceof Recovery)) return new Recovery(options);

  options = options || {};

  recovery.attempt = null;        // Stores the current reconnect attempt.
  recovery._fn = null;            // Stores the callback.

  recovery['reconnect timeout'] = defaults('reconnect timeout', recovery, options);
  recovery.retries = defaults('retries', recovery, options);
  recovery.factor = defaults('factor', recovery, options);
  recovery.max = defaults('max', recovery, options);
  recovery.min = defaults('min', recovery, options);
  recovery.timers = new Tick(recovery);
}

Recovery.prototype = new EventEmitter();
Recovery.prototype.constructor = Recovery;

Recovery['reconnect timeout'] = '30 seconds';  // Maximum time to wait for an answer.
Recovery.max = Infinity;                       // Maximum delay.
Recovery.min = '500 ms';                       // Minimum delay.
Recovery.retries = 10;                         // Maximum amount of retries.
Recovery.factor = 2;                           // Exponential back off factor.

/**
 * Start a new reconnect procedure.
 *
 * @returns {Recovery}
 * @api public
 */
Recovery.prototype.reconnect = function reconnect() {
  var recovery = this;

  return recovery.backoff(function backedoff(err, opts) {
    opts.duration = (+new Date()) - opts.start;

    if (err) return recovery.emit('reconnect failed', err, opts);

    recovery.emit('reconnected', opts);
  }, recovery.attempt);
};

/**
 * Exponential back off algorithm for retry operations. It uses a randomized
 * retry so we don't DDOS our server when it goes down under pressure.
 *
 * @param {Function} fn Callback to be called after the timeout.
 * @param {Object} opts Options for configuring the timeout.
 * @returns {Recovery}
 * @api private
 */
Recovery.prototype.backoff = function backoff(fn, opts) {
  var recovery = this;

  opts = opts || recovery.attempt || {};

  //
  // Bailout when we already have a back off process running. We shouldn't call
  // the callback then.
  //
  if (opts.backoff) return recovery;

  opts['reconnect timeout'] = defaults('reconnect timeout', recovery, opts);
  opts.retries = defaults('retries', recovery, opts);
  opts.factor = defaults('factor', recovery, opts);
  opts.max = defaults('max', recovery, opts);
  opts.min = defaults('min', recovery, opts);

  opts.start = +opts.start || +new Date();
  opts.duration = +opts.duration || 0;
  opts.attempt = +opts.attempt || 0;

  //
  // Bailout if we are about to make too much attempts.
  //
  if (opts.attempt === opts.retries) {
    fn.call(recovery, new Error('Unable to recover'), opts);
    return recovery;
  }

  //
  // Prevent duplicate back off attempts using the same options object and
  // increment our attempt as we're about to have another go at this thing.
  //
  opts.backoff = true;
  opts.attempt++;

  recovery.attempt = opts;

  //
  // Calculate the timeout, but make it randomly so we don't retry connections
  // at the same interval and defeat the purpose. This exponential back off is
  // based on the work of:
  //
  // http://dthain.blogspot.nl/2009/02/exponential-backoff-in-distributed.html
  //
  opts.scheduled = opts.attempt !== 1
    ? Math.min(Math.round(
        (Math.random() + 1) * opts.min * Math.pow(opts.factor, opts.attempt - 1)
      ), opts.max)
    : opts.min;

  recovery.timers.setTimeout('reconnect', function delay() {
    opts.duration = (+new Date()) - opts.start;
    opts.backoff = false;
    recovery.timers.clear('reconnect, timeout');

    //
    // Create a `one` function which can only be called once. So we can use the
    // same function for different types of invocations to create a much better
    // and usable API.
    //
    var connect = recovery._fn = one(function connect(err) {
      recovery.reset();

      if (err) return recovery.backoff(fn, opts);

      fn.call(recovery, undefined, opts);
    });

    recovery.emit('reconnect', opts, connect);
    recovery.timers.setTimeout('timeout', function timeout() {
      var err = new Error('Failed to reconnect in a timely manner');
      opts.duration = (+new Date()) - opts.start;

      recovery.emit('reconnect timeout', err, opts);
      connect(err);
    }, opts['reconnect timeout']);
  }, opts.scheduled);

  //
  // Emit a `reconnecting` event with current reconnect options. This allows
  // them to update the UI and provide their users with feedback.
  //
  recovery.emit('reconnect scheduled', opts);

  return recovery;
};

/**
 * Check if the reconnection process is currently reconnecting.
 *
 * @returns {Boolean}
 * @api public
 */
Recovery.prototype.reconnecting = function reconnecting() {
  return !!this.attempt;
};

/**
 * Tell our reconnection procedure that we're passed.
 *
 * @param {Error} err Reconnection failed.
 * @returns {Recovery}
 * @api public
 */
Recovery.prototype.reconnected = function reconnected(err) {
  if (this._fn) this._fn(err);
  return this;
};

/**
 * Reset the reconnection attempt so it can be re-used again.
 *
 * @returns {Recovery}
 * @api public
 */
Recovery.prototype.reset = function reset() {
  this._fn = this.attempt = null;
  this.timers.clear('reconnect, timeout');

  return this;
};

/**
 * Clean up the instance.
 *
 * @type {Function}
 * @returns {Boolean}
 * @api public
 */
Recovery.prototype.destroy = destroy('timers attempt _fn');

//
// Expose the module.
//
module.exports = Recovery;

},{"demolish":1,"eventemitter3":3,"millisecond":6,"one-time":7,"tick-tock":8}],6:[function(_dereq_,module,exports){
'use strict';

var regex = new RegExp('^((?:\\d+)?\\.?\\d+) *('+ [
  'milliseconds?',
  'msecs?',
  'ms',
  'seconds?',
  'secs?',
  's',
  'minutes?',
  'mins?',
  'm',
  'hours?',
  'hrs?',
  'h',
  'days?',
  'd',
  'weeks?',
  'wks?',
  'w',
  'years?',
  'yrs?',
  'y'
].join('|') +')?$', 'i');

var second = 1000
  , minute = second * 60
  , hour = minute * 60
  , day = hour * 24
  , week = day * 7
  , year = day * 365;

/**
 * Parse a time string and return the number value of it.
 *
 * @param {String} ms Time string.
 * @returns {Number}
 * @api private
 */
module.exports = function millisecond(ms) {
  if ('string' !== typeof ms || '0' === ms || +ms) return +ms;

  var match = regex.exec(ms)
    , amount;

  if (!match) return 0;

  amount = parseFloat(match[1]);

  switch (match[2].toLowerCase()) {
    case 'years':
    case 'year':
    case 'yrs':
    case 'yr':
    case 'y':
      return amount * year;

    case 'weeks':
    case 'week':
    case 'wks':
    case 'wk':
    case 'w':
      return amount * week;

    case 'days':
    case 'day':
    case 'd':
      return amount * day;

    case 'hours':
    case 'hour':
    case 'hrs':
    case 'hr':
    case 'h':
      return amount * hour;

    case 'minutes':
    case 'minute':
    case 'mins':
    case 'min':
    case 'm':
      return amount * minute;

    case 'seconds':
    case 'second':
    case 'secs':
    case 'sec':
    case 's':
      return amount * second;

    default:
      return amount;
  }
};

},{}],7:[function(_dereq_,module,exports){
'use strict';

/**
 * Wrap callbacks to prevent double execution.
 *
 * @param {Function} fn Function that should only be called once.
 * @returns {Function} A wrapped callback which prevents execution.
 * @api public
 */
module.exports = function one(fn) {
  var called = 0
    , value;

  /**
   * The function that prevents double execution.
   *
   * @api private
   */
  function onetime() {
    if (called) return value;

    called = 1;
    value = fn.apply(this, arguments);
    fn = null;

    return value;
  }

  //
  // To make debugging more easy we want to use the name of the supplied
  // function. So when you look at the functions that are assigned to event
  // listeners you don't see a load of `onetime` functions but actually the
  // names of the functions that this module will call.
  //
  onetime.displayName = fn.displayName || fn.name || onetime.displayName || onetime.name;
  return onetime;
};

},{}],8:[function(_dereq_,module,exports){
'use strict';

var has = Object.prototype.hasOwnProperty
  , ms = _dereq_('millisecond');

/**
 * Timer instance.
 *
 * @constructor
 * @param {Object} timer New timer instance.
 * @param {Function} clear Clears the timer instance.
 * @param {Function} duration Duration of the timer.
 * @param {Function} fn The functions that need to be executed.
 * @api private
 */
function Timer(timer, clear, duration, fn) {
  this.start = +(new Date());
  this.duration = duration;
  this.clear = clear;
  this.timer = timer;
  this.fns = [fn];
}

/**
 * Calculate the time left for a given timer.
 *
 * @returns {Number} Time in milliseconds.
 * @api public
 */
Timer.prototype.remaining = function remaining() {
  return this.duration - this.taken();
};

/**
 * Calculate the amount of time it has taken since we've set the timer.
 *
 * @returns {Number}
 * @api public
 */
Timer.prototype.taken = function taken() {
  return +(new Date()) - this.start;
};

/**
 * Custom wrappers for the various of clear{whatever} functions. We cannot
 * invoke them directly as this will cause thrown errors in Google Chrome with
 * an Illegal Invocation Error
 *
 * @see #2
 * @type {Function}
 * @api private
 */
function unsetTimeout(id) { clearTimeout(id); }
function unsetInterval(id) { clearInterval(id); }
function unsetImmediate(id) { clearImmediate(id); }

/**
 * Simple timer management.
 *
 * @constructor
 * @param {Mixed} context Context of the callbacks that we execute.
 * @api public
 */
function Tick(context) {
  if (!(this instanceof Tick)) return new Tick(context);

  this.timers = {};
  this.context = context || this;
}

/**
 * Return a function which will just iterate over all assigned callbacks and
 * optionally clear the timers from memory if needed.
 *
 * @param {String} name Name of the timer we need to execute.
 * @param {Boolean} clear Also clear from memory.
 * @returns {Function}
 * @api private
 */
Tick.prototype.tock = function ticktock(name, clear) {
  var tock = this;

  return function tickedtock() {
    if (!(name in tock.timers)) return;

    var timer = tock.timers[name]
      , fns = timer.fns.slice()
      , l = fns.length
      , i = 0;

    if (clear) tock.clear(name);
    else tock.start = +new Date();

    for (; i < l; i++) {
      fns[i].call(tock.context);
    }
  };
};

/**
 * Add a new timeout.
 *
 * @param {String} name Name of the timer.
 * @param {Function} fn Completion callback.
 * @param {Mixed} time Duration of the timer.
 * @returns {Tick}
 * @api public
 */
Tick.prototype.setTimeout = function timeout(name, fn, time) {
  var tick = this
    , tock;

  if (tick.timers[name]) {
    tick.timers[name].fns.push(fn);
    return tick;
  }

  tock = ms(time);
  tick.timers[name] = new Timer(
    setTimeout(tick.tock(name, true), ms(time)),
    unsetTimeout,
    tock,
    fn
  );

  return tick;
};

/**
 * Add a new interval.
 *
 * @param {String} name Name of the timer.
 * @param {Function} fn Completion callback.
 * @param {Mixed} time Interval of the timer.
 * @returns {Tick}
 * @api public
 */
Tick.prototype.setInterval = function interval(name, fn, time) {
  var tick = this
    , tock;

  if (tick.timers[name]) {
    tick.timers[name].fns.push(fn);
    return tick;
  }

  tock = ms(time);
  tick.timers[name] = new Timer(
    setInterval(tick.tock(name), ms(time)),
    unsetInterval,
    tock,
    fn
  );

  return tick;
};

/**
 * Add a new setImmediate.
 *
 * @param {String} name Name of the timer.
 * @param {Function} fn Completion callback.
 * @returns {Tick}
 * @api public
 */
Tick.prototype.setImmediate = function immediate(name, fn) {
  var tick = this;

  if ('function' !== typeof setImmediate) return tick.setTimeout(name, fn, 0);

  if (tick.timers[name]) {
    tick.timers[name].fns.push(fn);
    return tick;
  }

  tick.timers[name] = new Timer(
    setImmediate(tick.tock(name, true)),
    unsetImmediate,
    0,
    fn
  );

  return tick;
};

/**
 * Check if we have a timer set.
 *
 * @param {String} name
 * @returns {Boolean}
 * @api public
 */
Tick.prototype.active = function active(name) {
  return name in this.timers;
};

/**
 * Properly clean up all timeout references. If no arguments are supplied we
 * will attempt to clear every single timer that is present.
 *
 * @param {Arguments} ..args.. The names of the timeouts we need to clear
 * @returns {Tick}
 * @api public
 */
Tick.prototype.clear = function clear() {
  var args = arguments.length ? arguments : []
    , tick = this
    , timer, i, l;

  if (args.length === 1 && 'string' === typeof args[0]) {
    args = args[0].split(/[, ]+/);
  }

  if (!args.length) {
    for (timer in tick.timers) {
      if (has.call(tick.timers, timer)) args.push(timer);
    }
  }

  for (i = 0, l = args.length; i < l; i++) {
    timer = tick.timers[args[i]];

    if (!timer) continue;
    timer.clear(timer.timer);

    timer.fns = timer.timer = timer.clear = null;
    delete tick.timers[args[i]];
  }

  return tick;
};

/**
 * Adjust a timeout or interval to a new duration.
 *
 * @returns {Tick}
 * @api public
 */
Tick.prototype.adjust = function adjust(name, time) {
  var interval
    , tick = this
    , tock = ms(time)
    , timer = tick.timers[name];

  if (!timer) return tick;

  interval = timer.clear === unsetInterval;
  timer.clear(timer.timer);
  timer.start = +(new Date());
  timer.duration = tock;
  timer.timer = (interval ? setInterval : setTimeout)(tick.tock(name, !interval), tock);

  return tick;
};

/**
 * We will no longer use this module, prepare your self for global cleanups.
 *
 * @returns {Boolean}
 * @api public
 */
Tick.prototype.end = Tick.prototype.destroy = function end() {
  if (!this.context) return false;

  this.clear();
  this.context = this.timers = null;

  return true;
};

//
// Expose the timer factory.
//
Tick.Timer = Timer;
module.exports = Tick;

},{"millisecond":9}],9:[function(_dereq_,module,exports){
arguments[4][6][0].apply(exports,arguments)
},{"dup":6}],10:[function(_dereq_,module,exports){
'use strict';

var required = _dereq_('requires-port')
  , lolcation = _dereq_('./lolcation')
  , qs = _dereq_('querystringify')
  , relativere = /^\/(?!\/)/;

/**
 * These are the parse instructions for the URL parsers, it informs the parser
 * about:
 *
 * 0. The char it Needs to parse, if it's a string it should be done using
 *    indexOf, RegExp using exec and NaN means set as current value.
 * 1. The property we should set when parsing this value.
 * 2. Indication if it's backwards or forward parsing, when set as number it's
 *    the value of extra chars that should be split off.
 * 3. Inherit from location if non existing in the parser.
 * 4. `toLowerCase` the resulting value.
 */
var instructions = [
  ['#', 'hash'],                        // Extract from the back.
  ['?', 'query'],                       // Extract from the back.
  ['//', 'protocol', 2, 1, 1],          // Extract from the front.
  ['/', 'pathname'],                    // Extract from the back.
  ['@', 'auth', 1],                     // Extract from the front.
  [NaN, 'host', undefined, 1, 1],       // Set left over value.
  [/\:(\d+)$/, 'port'],                 // RegExp the back.
  [NaN, 'hostname', undefined, 1, 1]    // Set left over.
];

/**
 * The actual URL instance. Instead of returning an object we've opted-in to
 * create an actual constructor as it's much more memory efficient and
 * faster and it pleases my CDO.
 *
 * @constructor
 * @param {String} address URL we want to parse.
 * @param {Boolean|function} parser Parser for the query string.
 * @param {Object} location Location defaults for relative paths.
 * @api public
 */
function URL(address, location, parser) {
  if (!(this instanceof URL)) {
    return new URL(address, location, parser);
  }

  var relative = relativere.test(address)
    , parse, instruction, index, key
    , type = typeof location
    , url = this
    , i = 0;

  //
  // The following if statements allows this module two have compatibility with
  // 2 different API:
  //
  // 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments
  //    where the boolean indicates that the query string should also be parsed.
  //
  // 2. The `URL` interface of the browser which accepts a URL, object as
  //    arguments. The supplied object will be used as default values / fall-back
  //    for relative paths.
  //
  if ('object' !== type && 'string' !== type) {
    parser = location;
    location = null;
  }

  if (parser && 'function' !== typeof parser) {
    parser = qs.parse;
  }

  location = lolcation(location);

  for (; i < instructions.length; i++) {
    instruction = instructions[i];
    parse = instruction[0];
    key = instruction[1];

    if (parse !== parse) {
      url[key] = address;
    } else if ('string' === typeof parse) {
      if (~(index = address.indexOf(parse))) {
        if ('number' === typeof instruction[2]) {
          url[key] = address.slice(0, index);
          address = address.slice(index + instruction[2]);
        } else {
          url[key] = address.slice(index);
          address = address.slice(0, index);
        }
      }
    } else if (index = parse.exec(address)) {
      url[key] = index[1];
      address = address.slice(0, address.length - index[0].length);
    }

    url[key] = url[key] || (instruction[3] || ('port' === key && relative) ? location[key] || '' : '');

    //
    // Hostname, host and protocol should be lowercased so they can be used to
    // create a proper `origin`.
    //
    if (instruction[4]) {
      url[key] = url[key].toLowerCase();
    }
  }

  //
  // Also parse the supplied query string in to an object. If we're supplied
  // with a custom parser as function use that instead of the default build-in
  // parser.
  //
  if (parser) url.query = parser(url.query);

  //
  // We should not add port numbers if they are already the default port number
  // for a given protocol. As the host also contains the port number we're going
  // override it with the hostname which contains no port number.
  //
  if (!required(url.port, url.protocol)) {
    url.host = url.hostname;
    url.port = '';
  }

  //
  // Parse down the `auth` for the username and password.
  //
  url.username = url.password = '';
  if (url.auth) {
    instruction = url.auth.split(':');
    url.username = instruction[0] || '';
    url.password = instruction[1] || '';
  }

  //
  // The href is just the compiled result.
  //
  url.href = url.toString();
}

/**
 * This is convenience method for changing properties in the URL instance to
 * insure that they all propagate correctly.
 *
 * @param {String} prop Property we need to adjust.
 * @param {Mixed} value The newly assigned value.
 * @returns {URL}
 * @api public
 */
URL.prototype.set = function set(part, value, fn) {
  var url = this;

  if ('query' === part) {
    if ('string' === typeof value && value.length) {
      value = (fn || qs.parse)(value);
    }

    url[part] = value;
  } else if ('port' === part) {
    url[part] = value;

    if (!required(value, url.protocol)) {
      url.host = url.hostname;
      url[part] = '';
    } else if (value) {
      url.host = url.hostname +':'+ value;
    }
  } else if ('hostname' === part) {
    url[part] = value;

    if (url.port) value += ':'+ url.port;
    url.host = value;
  } else if ('host' === part) {
    url[part] = value;

    if (/\:\d+/.test(value)) {
      value = value.split(':');
      url.hostname = value[0];
      url.port = value[1];
    }
  } else {
    url[part] = value;
  }

  url.href = url.toString();
  return url;
};

/**
 * Transform the properties back in to a valid and full URL string.
 *
 * @param {Function} stringify Optional query stringify function.
 * @returns {String}
 * @api public
 */
URL.prototype.toString = function toString(stringify) {
  if (!stringify || 'function' !== typeof stringify) stringify = qs.stringify;

  var query
    , url = this
    , result = url.protocol +'//';

  if (url.username) {
    result += url.username;
    if (url.password) result += ':'+ url.password;
    result += '@';
  }

  result += url.hostname;
  if (url.port) result += ':'+ url.port;

  result += url.pathname;

  query = 'object' === typeof url.query ? stringify(url.query) : url.query;
  if (query) result += '?' !== query.charAt(0) ? '?'+ query : query;

  if (url.hash) result += url.hash;

  return result;
};

//
// Expose the URL parser and some additional properties that might be useful for
// others.
//
URL.qs = qs;
URL.location = lolcation;
module.exports = URL;

},{"./lolcation":11,"querystringify":4,"requires-port":12}],11:[function(_dereq_,module,exports){
(function (global){
'use strict';

/**
 * These properties should not be copied or inherited from. This is only needed
 * for all non blob URL's as the a blob URL does not include a hash, only the
 * origin.
 *
 * @type {Object}
 * @private
 */
var ignore = { hash: 1, query: 1 }
  , URL;

/**
 * The location object differs when your code is loaded through a normal page,
 * Worker or through a worker using a blob. And with the blobble begins the
 * trouble as the location object will contain the URL of the blob, not the
 * location of the page where our code is loaded in. The actual origin is
 * encoded in the `pathname` so we can thankfully generate a good "default"
 * location from it so we can generate proper relative URL's again.
 *
 * @param {Object} loc Optional default location object.
 * @returns {Object} lolcation object.
 * @api public
 */
module.exports = function lolcation(loc) {
  loc = loc || global.location || {};
  URL = URL || _dereq_('./');

  var finaldestination = {}
    , type = typeof loc
    , key;

  if ('blob:' === loc.protocol) {
    finaldestination = new URL(unescape(loc.pathname), {});
  } else if ('string' === type) {
    finaldestination = new URL(loc, {});
    for (key in ignore) delete finaldestination[key];
  } else if ('object' === type) for (key in loc) {
    if (key in ignore) continue;
    finaldestination[key] = loc[key];
  }

  return finaldestination;
};

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./":10}],12:[function(_dereq_,module,exports){
'use strict';

/**
 * Check if we're required to add a port number.
 *
 * @see https://url.spec.whatwg.org/#default-port
 * @param {Number|String} port Port number we need to check
 * @param {String} protocol Protocol we need to check against.
 * @returns {Boolean} Is it a default port for the given protocol
 * @api private
 */
module.exports = function required(port, protocol) {
  protocol = protocol.split(':')[0];
  port = +port;

  if (!port) return false;

  switch (protocol) {
    case 'http':
    case 'ws':
    return port !== 80;

    case 'https':
    case 'wss':
    return port !== 443;

    case 'ftp':
    return port !== 22;

    case 'gopher':
    return port !== 70;

    case 'file':
    return false;
  }

  return port !== 0;
};

},{}],13:[function(_dereq_,module,exports){
'use strict';

var alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split('')
  , length = 64
  , map = {}
  , seed = 0
  , i = 0
  , prev;

/**
 * Return a string representing the specified number.
 *
 * @param {Number} num The number to convert.
 * @returns {String} The string representation of the number.
 * @api public
 */
function encode(num) {
  var encoded = '';

  do {
    encoded = alphabet[num % length] + encoded;
    num = Math.floor(num / length);
  } while (num > 0);

  return encoded;
}

/**
 * Return the integer value specified by the given string.
 *
 * @param {String} str The string to convert.
 * @returns {Number} The integer value represented by the string.
 * @api public
 */
function decode(str) {
  var decoded = 0;

  for (i = 0; i < str.length; i++) {
    decoded = decoded * length + map[str.charAt(i)];
  }

  return decoded;
}

/**
 * Yeast: A tiny growing id generator.
 *
 * @returns {String} A unique id.
 * @api public
 */
function yeast() {
  var now = encode(+new Date());

  if (now !== prev) return seed = 0, prev = now;
  return now +'.'+ encode(seed++);
}

//
// Map each character to its index.
//
for (; i < length; i++) map[alphabet[i]] = i;

//
// Expose the `yeast`, `encode` and `decode` functions.
//
yeast.encode = encode;
yeast.decode = decode;
module.exports = yeast;

},{}],14:[function(_dereq_,module,exports){
/*globals require, define */
'use strict';

var EventEmitter = _dereq_('eventemitter3')
  , TickTock = _dereq_('tick-tock')
  , Recovery = _dereq_('recovery')
  , qs = _dereq_('querystringify')
  , destroy = _dereq_('demolish')
  , yeast = _dereq_('yeast')
  , u2028 = /\u2028/g
  , u2029 = /\u2029/g;

/**
 * Context assertion, ensure that some of our public Primus methods are called
 * with the correct context to ensure that
 *
 * @param {Primus} self The context of the function.
 * @param {String} method The method name.
 * @api private
 */
function context(self, method) {
  if (self instanceof Primus) return;

  var failure = new Error('Primus#'+ method + '\'s context should called with a Primus instance');

  if ('function' !== typeof self.listeners || !self.listeners('error').length) {
    throw failure;
  }

  self.emit('error', failure);
}

//
// Sets the default connection URL, it uses the default origin of the browser
// when supported but degrades for older browsers. In Node.js, we cannot guess
// where the user wants to connect to, so we just default to localhost.
//
var defaultUrl;

try {
  if (location.origin) {
    defaultUrl = location.origin;
  } else {
    defaultUrl = location.protocol +'//'+ location.hostname + (location.port ? ':'+ location.port : '');
  }
} catch (e) {
  defaultUrl = 'http://127.0.0.1';
}

/**
 * Primus is a real-time library agnostic framework for establishing real-time
 * connections with servers.
 *
 * Options:
 * - reconnect, configuration for the reconnect process.
 * - manual, don't automatically call `.open` to start the connection.
 * - websockets, force the use of WebSockets, even when you should avoid them.
 * - timeout, connect timeout, server didn't respond in a timely manner.
 * - ping, The heartbeat interval for sending a ping packet to the server.
 * - pong, The heartbeat timeout for receiving a response to the ping.
 * - network, Use network events as leading method for network connection drops.
 * - strategy, Reconnection strategies.
 * - transport, Transport options.
 * - url, uri, The URL to use connect with the server.
 *
 * @constructor
 * @param {String} url The URL of your server.
 * @param {Object} options The configuration.
 * @api public
 */
function Primus(url, options) {
  if (!(this instanceof Primus)) return new Primus(url, options);
  if ('function' !== typeof this.client) {
    var message = 'The client library has not been compiled correctly, ' +
      'see https://github.com/primus/primus#client-library for more details';
    return this.critical(new Error(message));
  }

  if ('object' === typeof url) {
    options = url;
    url = options.url || options.uri || defaultUrl;
  } else {
    options = options || {};
  }

  var primus = this;

  // The maximum number of messages that can be placed in queue.
  options.queueSize = 'queueSize' in options ? options.queueSize : Infinity;

  // Connection timeout duration.
  options.timeout = 'timeout' in options ? options.timeout : 10e3;

  // Stores the back off configuration.
  options.reconnect = 'reconnect' in options ? options.reconnect : {};

  // Heartbeat ping interval.
  options.ping = 'ping' in options ? options.ping : 25000;

  // Heartbeat pong response timeout.
  options.pong = 'pong' in options ? options.pong : 10e3;

  // Reconnect strategies.
  options.strategy = 'strategy' in options ? options.strategy : [];

  // Custom transport options.
  options.transport = 'transport' in options ? options.transport : {};

  primus.buffer = [];                           // Stores premature send data.
  primus.writable = true;                       // Silly stream compatibility.
  primus.readable = true;                       // Silly stream compatibility.
  primus.url = primus.parse(url || defaultUrl); // Parse the URL to a readable format.
  primus.readyState = Primus.CLOSED;            // The readyState of the connection.
  primus.options = options;                     // Reference to the supplied options.
  primus.timers = new TickTock(this);           // Contains all our timers.
  primus.socket = null;                         // Reference to the internal connection.
  primus.latency = 0;                           // Latency between messages.
  primus.disconnect = false;                    // Did we receive a disconnect packet?
  primus.transport = options.transport;         // Transport options.
  primus.transformers = {                       // Message transformers.
    outgoing: [],
    incoming: []
  };

  //
  // Create our reconnection instance.
  //
  primus.recovery = new Recovery(options.reconnect);

  //
  // Parse the reconnection strategy. It can have the following strategies:
  //
  // - timeout: Reconnect when we have a network timeout.
  // - disconnect: Reconnect when we have an unexpected disconnect.
  // - online: Reconnect when we're back online.
  //
  if ('string' === typeof options.strategy) {
    options.strategy = options.strategy.split(/\s?\,\s?/g);
  }

  if (false === options.strategy) {
    //
    // Strategies are disabled, but we still need an empty array to join it in
    // to nothing.
    //
    options.strategy = [];
  } else if (!options.strategy.length) {
    options.strategy.push('disconnect', 'online');

    //
    // Timeout based reconnection should only be enabled conditionally. When
    // authorization is enabled it could trigger.
    //
    if (!this.authorization) options.strategy.push('timeout');
  }

  options.strategy = options.strategy.join(',').toLowerCase();

  //
  // Force the use of WebSockets, even when we've detected some potential
  // broken WebSocket implementation.
  //
  if ('websockets' in options) {
    primus.AVOID_WEBSOCKETS = !options.websockets;
  }

  //
  // Force or disable the use of NETWORK events as leading client side
  // disconnection detection.
  //
  if ('network' in options) {
    primus.NETWORK_EVENTS = options.network;
  }

  //
  // Check if the user wants to manually initialise a connection. If they don't,
  // we want to do it after a really small timeout so we give the users enough
  // time to listen for `error` events etc.
  //
  if (!options.manual) primus.timers.setTimeout('open', function open() {
    primus.timers.clear('open');
    primus.open();
  }, 0);

  primus.initialise(options);
}

/**
 * Simple require wrapper to make browserify, node and require.js play nice.
 *
 * @param {String} name The module to require.
 * @returns {Object|Undefined} The module that we required.
 * @api private
 */
Primus.require = function requires(name) {
  if ('function' !== typeof _dereq_) return undefined;

  return !('function' === typeof define && define.amd)
    ? _dereq_(name)
    : undefined;
};

//
// It's possible that we're running in Node.js or in a Node.js compatible
// environment. In this cases we inherit from the Stream base class.
//
var Stream;

try {
  Primus.Stream = Stream = Primus.require('stream');

  //
  // Normally inheritance is done in the same way as we do in our catch
  // statement. But due to changes to the EventEmitter interface in Node 0.10
  // this will trigger annoying memory leak warnings and other potential issues
  // outlined in the issue linked below.
  //
  // @see https://github.com/joyent/node/issues/4971
  //
  Primus.require('util').inherits(Primus, Stream);
} catch (e) {
  Primus.Stream = EventEmitter;
  Primus.prototype = new EventEmitter();
}

/**
 * Primus readyStates, used internally to set the correct ready state.
 *
 * @type {Number}
 * @private
 */
Primus.OPENING = 1;   // We're opening the connection.
Primus.CLOSED  = 2;   // No active connection.
Primus.OPEN    = 3;   // The connection is open.

/**
 * Are we working with a potentially broken WebSockets implementation? This
 * boolean can be used by transformers to remove `WebSockets` from their
 * supported transports.
 *
 * @type {Boolean}
 * @private
 */
Primus.prototype.AVOID_WEBSOCKETS = false;

/**
 * Some browsers support registering emitting `online` and `offline` events when
 * the connection has been dropped on the client. We're going to detect it in
 * a simple `try {} catch (e) {}` statement so we don't have to do complicated
 * feature detection.
 *
 * @type {Boolean}
 * @private
 */
Primus.prototype.NETWORK_EVENTS = false;
Primus.prototype.online = true;

try {
  if (
       Primus.prototype.NETWORK_EVENTS = 'onLine' in navigator
    && (window.addEventListener || document.body.attachEvent)
  ) {
    if (!navigator.onLine) {
      Primus.prototype.online = false;
    }
  }
} catch (e) { }

/**
 * The Ark contains all our plugins definitions. It's namespaced by
 * name => plugin.
 *
 * @type {Object}
 * @private
 */
Primus.prototype.ark = {};

/**
 * Simple emit wrapper that returns a function that emits an event once it's
 * called. This makes it easier for transports to emit specific events.
 *
 * @returns {Function} A function that will emit the event when called.
 * @api public
 */
Primus.prototype.emits = _dereq_('emits');

/**
 * A small wrapper around `emits` to add a default parser when one is not
 * supplied. The default parser will defer the emission of the event to make
 * sure that the event is emitted at the correct time.
 *
 * @returns {Function} A function that will emit the event when called.
 * @api private
 */
Primus.prototype.trigger = function trigger() {
  for (var i = 0, l = arguments.length, args = new Array(l); i < l; i++) {
    args[i] = arguments[i];
  }

  if ('function' !== typeof args[l - 1]) args.push(function defer(next) {
    setTimeout(next, 0);
  });

  return this.emits.apply(this, args);
};

/**
 * Return the given plugin.
 *
 * @param {String} name The name of the plugin.
 * @returns {Object|undefined} The plugin or undefined.
 * @api public
 */
Primus.prototype.plugin = function plugin(name) {
  context(this, 'plugin');

  if (name) return this.ark[name];

  var plugins = {};

  for (name in this.ark) {
    plugins[name] = this.ark[name];
  }

  return plugins;
};

/**
 * Checks if the given event is an emitted event by Primus.
 *
 * @param {String} evt The event name.
 * @returns {Boolean} Indication of the event is reserved for internal use.
 * @api public
 */
Primus.prototype.reserved = function reserved(evt) {
  return (/^(incoming|outgoing)::/).test(evt)
  || evt in this.reserved.events;
};

/**
 * The actual events that are used by the client.
 *
 * @type {Object}
 * @public
 */
Primus.prototype.reserved.events = {
  'reconnect scheduled': 1,
  'reconnect timeout': 1,
  'readyStateChange': 1,
  'reconnect failed': 1,
  'reconnected': 1,
  'reconnect': 1,
  'offline': 1,
  'timeout': 1,
  'online': 1,
  'error': 1,
  'close': 1,
  'open': 1,
  'data': 1,
  'end': 1
};

/**
 * Initialise the Primus and setup all parsers and internal listeners.
 *
 * @param {Object} options The original options object.
 * @returns {Primus}
 * @api private
 */
Primus.prototype.initialise = function initialise(options) {
  var primus = this
    , start;

  primus.recovery
  .on('reconnected', primus.emits('reconnected'))
  .on('reconnect failed', primus.emits('reconnect failed', function failed(next) {
    primus.emit('end');
    next();
  }))
  .on('reconnect timeout', primus.emits('reconnect timeout'))
  .on('reconnect scheduled', primus.emits('reconnect scheduled'))
  .on('reconnect', primus.emits('reconnect', function reconnect(next) {
    primus.emit('outgoing::reconnect');
    next();
  }));

  primus.on('outgoing::open', function opening() {
    var readyState = primus.readyState;

    primus.readyState = Primus.OPENING;
    if (readyState !== primus.readyState) {
      primus.emit('readyStateChange', 'opening');
    }

    start = +new Date();
  });

  primus.on('incoming::open', function opened() {
    var readyState = primus.readyState;

    if (primus.recovery.reconnecting()) {
      primus.recovery.reconnected();
    }

    //
    // The connection has been opened so we should set our state to
    // (writ|read)able so our stream compatibility works as intended.
    //
    primus.writable = true;
    primus.readable = true;

    //
    // Make sure we are flagged as `online` as we've successfully opened the
    // connection.
    //
    if (!primus.online) {
      primus.online = true;
      primus.emit('online');
    }

    primus.readyState = Primus.OPEN;
    if (readyState !== primus.readyState) {
      primus.emit('readyStateChange', 'open');
    }

    primus.latency = +new Date() - start;
    primus.timers.clear('ping', 'pong');
    primus.heartbeat();

    if (primus.buffer.length) {
      var data = primus.buffer.slice()
        , length = data.length
        , i = 0;

      primus.buffer.length = 0;

      for (; i < length; i++) {
        primus._write(data[i]);
      }
    }

    primus.emit('open');
  });

  primus.on('incoming::pong', function pong(time) {
    primus.online = true;
    primus.timers.clear('pong');
    primus.heartbeat();

    primus.latency = (+new Date()) - time;
  });

  primus.on('incoming::error', function error(e) {
    var connect = primus.timers.active('connect')
      , err = e;

    //
    // When the error is not an Error instance we try to normalize it.
    //
    if ('string' === typeof e) {
      err = new Error(e);
    } else if (!(e instanceof Error) && 'object' === typeof e) {
      //
      // BrowserChannel and SockJS returns an object which contains some
      // details of the error. In order to have a proper error we "copy" the
      // details in an Error instance.
      //
      err = new Error(e.message || e.reason);
      for (var key in e) {
        if (Object.prototype.hasOwnProperty.call(e, key))
          err[key] = e[key];
      }
    }
    //
    // We're still doing a reconnect attempt, it could be that we failed to
    // connect because the server was down. Failing connect attempts should
    // always emit an `error` event instead of a `open` event.
    //
    //
    if (primus.recovery.reconnecting()) return primus.recovery.reconnected(err);
    if (primus.listeners('error').length) primus.emit('error', err);

    //
    // We received an error while connecting, this most likely the result of an
    // unauthorized access to the server.
    //
    if (connect) {
      if (~primus.options.strategy.indexOf('timeout')) {
        primus.recovery.reconnect();
      } else {
        primus.end();
      }
    }
  });

  primus.on('incoming::data', function message(raw) {
    primus.decoder(raw, function decoding(err, data) {
      //
      // Do a "save" emit('error') when we fail to parse a message. We don't
      // want to throw here as listening to errors should be optional.
      //
      if (err) return primus.listeners('error').length && primus.emit('error', err);

      //
      // Handle all "primus::" prefixed protocol messages.
      //
      if (primus.protocol(data)) return;
      primus.transforms(primus, primus, 'incoming', data, raw);
    });
  });

  primus.on('incoming::end', function end() {
    var readyState = primus.readyState;

    //
    // This `end` started with the receiving of a primus::server::close packet
    // which indicated that the user/developer on the server closed the
    // connection and it was not a result of a network disruption. So we should
    // kill the connection without doing a reconnect.
    //
    if (primus.disconnect) {
      primus.disconnect = false;

      return primus.end();
    }

    //
    // Always set the readyState to closed, and if we're still connecting, close
    // the connection so we're sure that everything after this if statement block
    // is only executed because our readyState is set to `open`.
    //
    primus.readyState = Primus.CLOSED;
    if (readyState !== primus.readyState) {
      primus.emit('readyStateChange', 'end');
    }

    if (primus.timers.active('connect')) primus.end();
    if (readyState !== Primus.OPEN) {
      return primus.recovery.reconnecting()
        ? primus.recovery.reconnect()
        : false;
    }

    this.writable = false;
    this.readable = false;

    //
    // Clear all timers in case we're not going to reconnect.
    //
    this.timers.clear();

    //
    // Fire the `close` event as an indication of connection disruption.
    // This is also fired by `primus#end` so it is emitted in all cases.
    //
    primus.emit('close');

    //
    // The disconnect was unintentional, probably because the server has
    // shutdown, so if the reconnection is enabled start a reconnect procedure.
    //
    if (~primus.options.strategy.indexOf('disconnect')) {
      return primus.recovery.reconnect();
    }

    primus.emit('outgoing::end');
    primus.emit('end');
  });

  //
  // Setup the real-time client.
  //
  primus.client();

  //
  // Process the potential plugins.
  //
  for (var plugin in primus.ark) {
    primus.ark[plugin].call(primus, primus, options);
  }

  //
  // NOTE: The following code is only required if we're supporting network
  // events as it requires access to browser globals.
  //
  if (!primus.NETWORK_EVENTS) return primus;

  /**
   * Handler for offline notifications.
   *
   * @api private
   */
  primus.offlineHandler = function offline() {
    if (!primus.online) return; // Already or still offline, bailout.

    primus.online = false;
    primus.emit('offline');
    primus.end();

    //
    // It is certainly possible that we're in a reconnection loop and that the
    // user goes offline. In this case we want to kill the existing attempt so
    // when the user goes online, it will attempt to reconnect freshly again.
    //
    primus.recovery.reset();
  };

  /**
   * Handler for online notifications.
   *
   * @api private
   */
  primus.onlineHandler = function online() {
    if (primus.online) return; // Already or still online, bailout.

    primus.online = true;
    primus.emit('online');

    if (~primus.options.strategy.indexOf('online')) {
      primus.recovery.reconnect();
    }
  };

  if (window.addEventListener) {
    window.addEventListener('offline', primus.offlineHandler, false);
    window.addEventListener('online', primus.onlineHandler, false);
  } else if (document.body.attachEvent){
    document.body.attachEvent('onoffline', primus.offlineHandler);
    document.body.attachEvent('ononline', primus.onlineHandler);
  }

  return primus;
};

/**
 * Really dead simple protocol parser. We simply assume that every message that
 * is prefixed with `primus::` could be used as some sort of protocol definition
 * for Primus.
 *
 * @param {String} msg The data.
 * @returns {Boolean} Is a protocol message.
 * @api private
 */
Primus.prototype.protocol = function protocol(msg) {
  if (
       'string' !== typeof msg
    || msg.indexOf('primus::') !== 0
  ) return false;

  var last = msg.indexOf(':', 8)
    , value = msg.slice(last + 2);

  switch (msg.slice(8,  last)) {
    case 'pong':
      this.emit('incoming::pong', +value);
    break;

    case 'server':
      //
      // The server is closing the connection, forcefully disconnect so we don't
      // reconnect again.
      //
      if ('close' === value) {
        this.disconnect = true;
      }
    break;

    case 'id':
      this.emit('incoming::id', value);
    break;

    //
    // Unknown protocol, somebody is probably sending `primus::` prefixed
    // messages.
    //
    default:
      return false;
  }

  return true;
};

/**
 * Execute the set of message transformers from Primus on the incoming or
 * outgoing message.
 * This function and it's content should be in sync with Spark#transforms in
 * spark.js.
 *
 * @param {Primus} primus Reference to the Primus instance with message transformers.
 * @param {Spark|Primus} connection Connection that receives or sends data.
 * @param {String} type The type of message, 'incoming' or 'outgoing'.
 * @param {Mixed} data The data to send or that has been received.
 * @param {String} raw The raw encoded data.
 * @returns {Primus}
 * @api public
 */
Primus.prototype.transforms = function transforms(primus, connection, type, data, raw) {
  var packet = { data: data }
    , fns = primus.transformers[type];

  //
  // Iterate in series over the message transformers so we can allow optional
  // asynchronous execution of message transformers which could for example
  // retrieve additional data from the server, do extra decoding or even
  // message validation.
  //
  (function transform(index, done) {
    var transformer = fns[index++];

    if (!transformer) return done();

    if (1 === transformer.length) {
      if (false === transformer.call(connection, packet)) {
        //
        // When false is returned by an incoming transformer it means that's
        // being handled by the transformer and we should not emit the `data`
        // event.
        //
        return;
      }

      return transform(index, done);
    }

    transformer.call(connection, packet, function finished(err, arg) {
      if (err) return connection.emit('error', err);
      if (false === arg) return;

      transform(index, done);
    });
  }(0, function done() {
    //
    // We always emit 2 arguments for the data event, the first argument is the
    // parsed data and the second argument is the raw string that we received.
    // This allows you, for example, to do some validation on the parsed data
    // and then save the raw string in your database without the stringify
    // overhead.
    //
    if ('incoming' === type) return connection.emit('data', packet.data, raw);

    connection._write(packet.data);
  }));

  return this;
};

/**
 * Retrieve the current id from the server.
 *
 * @param {Function} fn Callback function.
 * @returns {Primus}
 * @api public
 */
Primus.prototype.id = function id(fn) {
  if (this.socket && this.socket.id) return fn(this.socket.id);

  this._write('primus::id::');
  return this.once('incoming::id', fn);
};

/**
 * Establish a connection with the server. When this function is called we
 * assume that we don't have any open connections. If you do call it when you
 * have a connection open, it could cause duplicate connections.
 *
 * @returns {Primus}
 * @api public
 */
Primus.prototype.open = function open() {
  context(this, 'open');

  //
  // Only start a `connection timeout` procedure if we're not reconnecting as
  // that shouldn't count as an initial connection. This should be started
  // before the connection is opened to capture failing connections and kill the
  // timeout.
  //
  if (!this.recovery.reconnecting() && this.options.timeout) this.timeout();

  this.emit('outgoing::open');
  return this;
};

/**
 * Send a new message.
 *
 * @param {Mixed} data The data that needs to be written.
 * @returns {Boolean} Always returns true as we don't support back pressure.
 * @api public
 */
Primus.prototype.write = function write(data) {
  context(this, 'write');
  this.transforms(this, this, 'outgoing', data);

  return true;
};

/**
 * The actual message writer.
 *
 * @param {Mixed} data The message that needs to be written.
 * @returns {Boolean} Successful write to the underlaying transport.
 * @api private
 */
Primus.prototype._write = function write(data) {
  var primus = this;

  //
  // The connection is closed, normally this would already be done in the
  // `spark.write` method, but as `_write` is used internally, we should also
  // add the same check here to prevent potential crashes by writing to a dead
  // socket.
  //
  if (Primus.OPEN !== primus.readyState) {
    //
    // If the buffer is at capacity, remove the first item.
    //
    if (this.buffer.length === this.options.queueSize) {
      this.buffer.splice(0, 1);
    }

    this.buffer.push(data);
    return false;
  }

  primus.encoder(data, function encoded(err, packet) {
    //
    // Do a "safe" emit('error') when we fail to parse a message. We don't
    // want to throw here as listening to errors should be optional.
    //
    if (err) return primus.listeners('error').length && primus.emit('error', err);

    //
    // Hack 1: \u2028 and \u2029 are allowed inside a JSON string, but JavaScript
    // defines them as newline separators. Unescaped control characters are not
    // allowed inside JSON strings, so this causes an error at parse time. We
    // work around this issue by escaping these characters. This can cause
    // errors with JSONP requests or if the string is just evaluated.
    //
    if ('string' === typeof packet) {
      if (~packet.indexOf('\u2028')) packet = packet.replace(u2028, '\\u2028');
      if (~packet.indexOf('\u2029')) packet = packet.replace(u2029, '\\u2029');
    }

    primus.emit('outgoing::data', packet);
  });

  return true;
};

/**
 * Send a new heartbeat over the connection to ensure that we're still
 * connected and our internet connection didn't drop. We cannot use server side
 * heartbeats for this unfortunately.
 *
 * @returns {Primus}
 * @api private
 */
Primus.prototype.heartbeat = function heartbeat() {
  var primus = this;

  if (!primus.options.ping) return primus;

  /**
   * Exterminate the connection as we've timed out.
   *
   * @api private
   */
  function pong() {
    primus.timers.clear('pong');

    //
    // The network events already captured the offline event.
    //
    if (!primus.online) return;

    primus.online = false;
    primus.emit('offline');
    primus.emit('incoming::end');
  }

  /**
   * We should send a ping message to the server.
   *
   * @api private
   */
  function ping() {
    var value = +new Date();

    primus.timers.clear('ping');
    primus._write('primus::ping::'+ value);
    primus.emit('outgoing::ping', value);
    primus.timers.setTimeout('pong', pong, primus.options.pong);
  }

  primus.timers.setTimeout('ping', ping, primus.options.ping);
  return this;
};

/**
 * Start a connection timeout.
 *
 * @returns {Primus}
 * @api private
 */
Primus.prototype.timeout = function timeout() {
  var primus = this;

  /**
   * Remove all references to the timeout listener as we've received an event
   * that can be used to determine state.
   *
   * @api private
   */
  function remove() {
    primus.removeListener('error', remove)
          .removeListener('open', remove)
          .removeListener('end', remove)
          .timers.clear('connect');
  }

  primus.timers.setTimeout('connect', function expired() {
    remove(); // Clean up old references.

    if (primus.readyState === Primus.OPEN || primus.recovery.reconnecting()) {
      return;
    }

    primus.emit('timeout');

    //
    // We failed to connect to the server.
    //
    if (~primus.options.strategy.indexOf('timeout')) {
      primus.recovery.reconnect();
    } else {
      primus.end();
    }
  }, primus.options.timeout);

  return primus.on('error', remove)
    .on('open', remove)
    .on('end', remove);
};

/**
 * Close the connection completely.
 *
 * @param {Mixed} data last packet of data.
 * @returns {Primus}
 * @api public
 */
Primus.prototype.end = function end(data) {
  context(this, 'end');

  if (
      this.readyState === Primus.CLOSED
    && !this.timers.active('connect')
    && !this.timers.active('open')
  ) {
    //
    // If we are reconnecting stop the reconnection procedure.
    //
    if (this.recovery.reconnecting()) {
      this.recovery.reset();
      this.emit('end');
    }

    return this;
  }

  if (data !== undefined) this.write(data);

  this.writable = false;
  this.readable = false;

  var readyState = this.readyState;
  this.readyState = Primus.CLOSED;

  if (readyState !== this.readyState) {
    this.emit('readyStateChange', 'end');
  }

  this.timers.clear();
  this.emit('outgoing::end');
  this.emit('close');
  this.emit('end');

  return this;
};

/**
 * Completely demolish the Primus instance and forcefully nuke all references.
 *
 * @returns {Boolean}
 * @api public
 */
Primus.prototype.destroy = destroy('url timers options recovery socket transport transformers', {
  before: 'end',
  after: ['removeAllListeners', function detach() {
    if (!this.NETWORK_EVENTS) return;

    if (window.addEventListener) {
      window.removeEventListener('offline', this.offlineHandler);
      window.removeEventListener('online', this.onlineHandler);
    } else if (document.body.attachEvent){
      document.body.detachEvent('onoffline', this.offlineHandler);
      document.body.detachEvent('ononline', this.onlineHandler);
    }
  }]
});

/**
 * Create a shallow clone of a given object.
 *
 * @param {Object} obj The object that needs to be cloned.
 * @returns {Object} Copy.
 * @api private
 */
Primus.prototype.clone = function clone(obj) {
  return this.merge({}, obj);
};

/**
 * Merge different objects in to one target object.
 *
 * @param {Object} target The object where everything should be merged in.
 * @returns {Object} Original target with all merged objects.
 * @api private
 */
Primus.prototype.merge = function merge(target) {
  var args = Array.prototype.slice.call(arguments, 1);

  for (var i = 0, l = args.length, key, obj; i < l; i++) {
    obj = args[i];

    for (key in obj) {
      if (obj.hasOwnProperty(key)) target[key] = obj[key];
    }
  }

  return target;
};

/**
 * Parse the connection string.
 *
 * @type {Function}
 * @param {String} url Connection URL.
 * @returns {Object} Parsed connection.
 * @api private
 */
Primus.prototype.parse = _dereq_('url-parse');

/**
 * Parse a query string.
 *
 * @param {String} query The query string that needs to be parsed.
 * @returns {Object} Parsed query string.
 * @api private
 */
Primus.prototype.querystring = qs.parse;
/**
 * Transform a query string object back into string equiv.
 *
 * @param {Object} obj The query string object.
 * @returns {String}
 * @api private
 */
Primus.prototype.querystringify = qs.stringify;

/**
 * Generates a connection URI.
 *
 * @param {String} protocol The protocol that should used to crate the URI.
 * @returns {String|options} The URL.
 * @api private
 */
Primus.prototype.uri = function uri(options) {
  var url = this.url
    , server = []
    , qsa = false;

  //
  // Query strings are only allowed when we've received clearance for it.
  //
  if (options.query) qsa = true;

  options = options || {};
  options.protocol = 'protocol' in options
    ? options.protocol
    : 'http:';
  options.query = url.query && qsa
    ? url.query.slice(1)
    : false;
  options.secure = 'secure' in options
    ? options.secure
    : url.protocol === 'https:' || url.protocol === 'wss:';
  options.auth = 'auth' in options
    ? options.auth
    : url.auth;
  options.pathname = 'pathname' in options
    ? options.pathname
    : this.pathname;
  options.port = 'port' in options
    ? +options.port
    : +url.port || (options.secure ? 443 : 80);

  //
  // Allow transformation of the options before we construct a full URL from it.
  //
  this.emit('outgoing::url', options);

  //
  // We need to make sure that we create a unique connection URL every time to
  // prevent back forward cache from becoming an issue. We're doing this by
  // forcing an cache busting query string in to the URL.
  //
  var querystring = this.querystring(options.query || '');
  querystring._primuscb = yeast();
  options.query = this.querystringify(querystring);

  //
  // Automatically suffix the protocol so we can supply `ws:` and `http:` and
  // it gets transformed correctly.
  //
  server.push(options.secure ? options.protocol.replace(':', 's:') : options.protocol, '');

  server.push(options.auth ? options.auth +'@'+ url.host : url.host);

  //
  // Pathnames are optional as some Transformers would just use the pathname
  // directly.
  //
  if (options.pathname) server.push(options.pathname.slice(1));

  //
  // Optionally add a search query.
  //
  if (qsa) server.push('?'+ options.query);
  else delete options.query;

  if (options.object) return options;
  return server.join('/');
};

/**
 * Register a new message transformer. This allows you to easily manipulate incoming
 * and outgoing data which is particularity handy for plugins that want to send
 * meta data together with the messages.
 *
 * @param {String} type Incoming or outgoing
 * @param {Function} fn A new message transformer.
 * @returns {Primus}
 * @api public
 */
Primus.prototype.transform = function transform(type, fn) {
  context(this, 'transform');

  if (!(type in this.transformers)) {
    return this.critical(new Error('Invalid transformer type'));
  }

  this.transformers[type].push(fn);
  return this;
};

/**
 * A critical error has occurred, if we have an `error` listener, emit it there.
 * If not, throw it, so we get a stack trace + proper error message.
 *
 * @param {Error} err The critical error.
 * @returns {Primus}
 * @api private
 */
Primus.prototype.critical = function critical(err) {
  if (this.listeners('error').length) {
    this.emit('error', err);
    return this;
  }

  throw err;
};

/**
 * Syntax sugar, adopt a Socket.IO like API.
 *
 * @param {String} url The URL we want to connect to.
 * @param {Object} options Connection options.
 * @returns {Primus}
 * @api public
 */
Primus.connect = function connect(url, options) {
  return new Primus(url, options);
};

//
// Expose the EventEmitter so it can be re-used by wrapping libraries we're also
// exposing the Stream interface.
//
Primus.EventEmitter = EventEmitter;

//
// These libraries are automatically are automatically inserted at the
// server-side using the Primus#library method.
//
Primus.prototype.client = function client() {
  var onmessage = this.trigger('incoming::data')
    , onerror = this.trigger('incoming::error')
    , onopen = this.trigger('incoming::open')
    , onclose = this.trigger('incoming::end')
    , primus = this
    , socket;

  //
  // Select an available Engine.IO factory.
  //
  var factory = (function factory() {
    if ('undefined' !== typeof eio) return eio;

    try { return Primus.require('engine.io-client'); }
    catch (e) {}

    return undefined;
  })();

  if (!factory) return primus.critical(new Error(
    'Missing required `engine.io-client` module. ' +
    'Please run `npm install --save engine.io-client`'
  ));

  //
  // Connect to the given URL.
  //
  primus.on('outgoing::open', function opening() {
    primus.emit('outgoing::end');

    primus.socket = socket = factory(primus.merge(primus.transport,
      primus.url,
      primus.uri({ protocol: 'http:', query: true, object: true }), {
      //
      // Never remember upgrades as switching from a WIFI to a 3G connection
      // could still get your connection blocked as 3G connections are usually
      // behind a reverse proxy so ISP's can optimize mobile traffic by
      // caching requests.
      //
      rememberUpgrade: false,

      //
      // Binary support in Engine.IO breaks a shit things. Turn it off for now.
      //
      forceBase64: true,

      //
      // XDR has been the source of pain for most real-time users. It doesn't
      // support the full CORS spec and is infested with bugs. It cannot connect
      // cross-scheme, does not send ANY authorization information like Cookies,
      // Basic Authorization headers etc. Force this off by default to ensure a
      // stable connection.
      //
      enablesXDR: false,

      //
      // Force timestamps on every single connection. Engine.IO only does this
      // for polling by default, but WebSockets require an explicit `true`
      // boolean.
      //
      timestampRequests: true,
      path: this.pathname,
      transports: !primus.AVOID_WEBSOCKETS
        ? ['polling', 'websocket']
        : ['polling']
    }));

    //
    // Nuke a growing memory leak as Engine.IO pushes instances in to an exposed
    // `sockets` array.
    //
    if (factory.sockets && factory.sockets.length) {
      factory.sockets.length = 0;
    }

    //
    // Setup the Event handlers.
    //
    socket.on('message', onmessage);
    socket.on('error', onerror);
    socket.on('close', onclose);
    socket.on('open', onopen);
  });

  //
  // We need to write a new message to the socket.
  //
  primus.on('outgoing::data', function write(message) {
    if (socket) socket.send(message);
  });

  //
  // Attempt to reconnect the socket.
  //
  primus.on('outgoing::reconnect', function reconnect() {
    primus.emit('outgoing::open');
  });

  //
  // We need to close the socket.
  //
  primus.on('outgoing::end', function close() {
    if (!socket) return;

    socket.removeListener('message', onmessage);
    socket.removeListener('error', onerror);
    socket.removeListener('close', onclose);
    socket.removeListener('open', onopen);
    socket.close();
    socket = null;
  });
};
Primus.prototype.authorization = false;
Primus.prototype.pathname = "/primus";
Primus.prototype.encoder = function encoder(data, fn) {
  var err;

  try { data = JSON.stringify(data); }
  catch (e) { err = e; }

  fn(err, data);
};
Primus.prototype.decoder = function decoder(data, fn) {
  var err;

  if ('string' !== typeof data) return fn(err, data);

  try { data = JSON.parse(data); }
  catch (e) { err = e; }

  fn(err, data);
};
Primus.prototype.version = "4.0.5";

if (
     'undefined' !== typeof document
  && 'undefined' !== typeof navigator
) {
  //
  // Hack 2: If you press ESC in FireFox it will close all active connections.
  // Normally this makes sense, when your page is still loading. But versions
  // before FireFox 22 will close all connections including WebSocket connections
  // after page load. One way to prevent this is to do a `preventDefault()` and
  // cancel the operation before it bubbles up to the browsers default handler.
  // It needs to be added as `keydown` event, if it's added keyup it will not be
  // able to prevent the connection from being closed.
  //
  if (document.addEventListener) {
    document.addEventListener('keydown', function keydown(e) {
      if (e.keyCode !== 27 || !e.preventDefault) return;

      e.preventDefault();
    }, false);
  }

  //
  // Hack 3: This is a Mac/Apple bug only, when you're behind a reverse proxy or
  // have you network settings set to `automatic proxy discovery` the safari
  // browser will crash when the WebSocket constructor is initialised. There is
  // no way to detect the usage of these proxies available in JavaScript so we
  // need to do some nasty browser sniffing. This only affects Safari versions
  // lower then 5.1.4
  //
  var ua = (navigator.userAgent || '').toLowerCase()
    , parsed = ua.match(/.+(?:rv|it|ra|ie)[\/: ](\d+)\.(\d+)(?:\.(\d+))?/) || []
    , version = +[parsed[1], parsed[2]].join('.');

  if (
       !~ua.indexOf('chrome')
    && ~ua.indexOf('safari')
    && version < 534.54
  ) {
    Primus.prototype.AVOID_WEBSOCKETS = true;
  }
}

//
// Expose the library.
//
module.exports = Primus;

},{"demolish":1,"emits":2,"eventemitter3":3,"querystringify":4,"recovery":5,"tick-tock":8,"url-parse":10,"yeast":13}]},{},[14])(14);
Primus.prototype.ark["emit"] = function client(primus) {
  var toString = Object.prototype.toString
    , emit = primus.emit;

  primus.transform('incoming', function incoming(packet) {
    var data = packet.data;

    if (
         'object' !== typeof data                       // Events are objects.
      || !~toString.call(data.emit).indexOf(' Array]')  // Not an emit object.
    ) {
      return;
    }

    //
    // Check if we've received an event that is already used internally.
    // We use our previously saved `emit` function to emit the event so we
    // prevent recursion and message flood.
    //
    if (!this.reserved(data.emit[0])) emit.apply(primus, data.emit);

    return false;
  });

  primus.emit = function emitter(event) {
    if (
         primus.reserved(event)
      || 'newListener' === event
      || 'removeListener' === event
    ) return emit.apply(this, arguments);

    primus.write({ emit: Array.prototype.slice.call(arguments, 0) });
    return true;
  };
};
  return Primus;
});

(function libraryWrap(Primus) {
(function(f){var g;if(typeof window!=='undefined'){g=window}else if(typeof self!=='undefined'){g=self}g.eio=f()})(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);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.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){

module.exports = _dereq_('./socket');

/**
 * Exports parser
 *
 * @api public
 *
 */
module.exports.parser = _dereq_('engine.io-parser');

},{"./socket":2,"engine.io-parser":15}],2:[function(_dereq_,module,exports){
(function (global){
/**
 * Module dependencies.
 */

var transports = _dereq_('./transports');
var Emitter = _dereq_('component-emitter');
var debug = _dereq_('debug')('engine.io-client:socket');
var index = _dereq_('indexof');
var parser = _dereq_('engine.io-parser');
var parseuri = _dereq_('parseuri');
var parsejson = _dereq_('parsejson');
var parseqs = _dereq_('parseqs');

/**
 * Module exports.
 */

module.exports = Socket;

/**
 * Noop function.
 *
 * @api private
 */

function noop(){}

/**
 * Socket constructor.
 *
 * @param {String|Object} uri or options
 * @param {Object} options
 * @api public
 */

function Socket(uri, opts){
  if (!(this instanceof Socket)) return new Socket(uri, opts);

  opts = opts || {};

  if (uri && 'object' == typeof uri) {
    opts = uri;
    uri = null;
  }

  if (uri) {
    uri = parseuri(uri);
    opts.hostname = uri.host;
    opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
    opts.port = uri.port;
    if (uri.query) opts.query = uri.query;
  } else if (opts.host) {
    opts.hostname = parseuri(opts.host).host;
  }

  this.secure = null != opts.secure ? opts.secure :
    (global.location && 'https:' == location.protocol);

  if (opts.hostname && !opts.port) {
    // if no port is specified manually, use the protocol default
    opts.port = this.secure ? '443' : '80';
  }

  this.agent = opts.agent || false;
  this.hostname = opts.hostname ||
    (global.location ? location.hostname : 'localhost');
  this.port = opts.port || (global.location && location.port ?
       location.port :
       (this.secure ? 443 : 80));
  this.query = opts.query || {};
  if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
  this.upgrade = false !== opts.upgrade;
  this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
  this.forceJSONP = !!opts.forceJSONP;
  this.jsonp = false !== opts.jsonp;
  this.forceBase64 = !!opts.forceBase64;
  this.enablesXDR = !!opts.enablesXDR;
  this.timestampParam = opts.timestampParam || 't';
  this.timestampRequests = opts.timestampRequests;
  this.transports = opts.transports || ['polling', 'websocket'];
  this.readyState = '';
  this.writeBuffer = [];
  this.policyPort = opts.policyPort || 843;
  this.rememberUpgrade = opts.rememberUpgrade || false;
  this.binaryType = null;
  this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
  this.perMessageDeflate = false !== opts.perMessageDeflate ? (opts.perMessageDeflate || {}) : false;

  if (true === this.perMessageDeflate) this.perMessageDeflate = {};
  if (this.perMessageDeflate && null == this.perMessageDeflate.threshold) {
    this.perMessageDeflate.threshold = 1024;
  }

  // SSL options for Node.js client
  this.pfx = opts.pfx || null;
  this.key = opts.key || null;
  this.passphrase = opts.passphrase || null;
  this.cert = opts.cert || null;
  this.ca = opts.ca || null;
  this.ciphers = opts.ciphers || null;
  this.rejectUnauthorized = opts.rejectUnauthorized === undefined ? null : opts.rejectUnauthorized;

  // other options for Node.js client
  var freeGlobal = typeof global == 'object' && global;
  if (freeGlobal.global === freeGlobal) {
    if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {
      this.extraHeaders = opts.extraHeaders;
    }
  }

  this.open();
}

Socket.priorWebsocketSuccess = false;

/**
 * Mix in `Emitter`.
 */

Emitter(Socket.prototype);

/**
 * Protocol version.
 *
 * @api public
 */

Socket.protocol = parser.protocol; // this is an int

/**
 * Expose deps for legacy compatibility
 * and standalone browser access.
 */

Socket.Socket = Socket;
Socket.Transport = _dereq_('./transport');
Socket.transports = _dereq_('./transports');
Socket.parser = _dereq_('engine.io-parser');

/**
 * Creates transport of the given type.
 *
 * @param {String} transport name
 * @return {Transport}
 * @api private
 */

Socket.prototype.createTransport = function (name) {
  debug('creating transport "%s"', name);
  var query = clone(this.query);

  // append engine.io protocol identifier
  query.EIO = parser.protocol;

  // transport name
  query.transport = name;

  // session id if we already have one
  if (this.id) query.sid = this.id;

  var transport = new transports[name]({
    agent: this.agent,
    hostname: this.hostname,
    port: this.port,
    secure: this.secure,
    path: this.path,
    query: query,
    forceJSONP: this.forceJSONP,
    jsonp: this.jsonp,
    forceBase64: this.forceBase64,
    enablesXDR: this.enablesXDR,
    timestampRequests: this.timestampRequests,
    timestampParam: this.timestampParam,
    policyPort: this.policyPort,
    socket: this,
    pfx: this.pfx,
    key: this.key,
    passphrase: this.passphrase,
    cert: this.cert,
    ca: this.ca,
    ciphers: this.ciphers,
    rejectUnauthorized: this.rejectUnauthorized,
    perMessageDeflate: this.perMessageDeflate,
    extraHeaders: this.extraHeaders
  });

  return transport;
};

function clone (obj) {
  var o = {};
  for (var i in obj) {
    if (obj.hasOwnProperty(i)) {
      o[i] = obj[i];
    }
  }
  return o;
}

/**
 * Initializes transport to use and starts probe.
 *
 * @api private
 */
Socket.prototype.open = function () {
  var transport;
  if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
    transport = 'websocket';
  } else if (0 === this.transports.length) {
    // Emit error on next tick so it can be listened to
    var self = this;
    setTimeout(function() {
      self.emit('error', 'No transports available');
    }, 0);
    return;
  } else {
    transport = this.transports[0];
  }
  this.readyState = 'opening';

  // Retry with the next transport if the transport is disabled (jsonp: false)
  try {
    transport = this.createTransport(transport);
  } catch (e) {
    this.transports.shift();
    this.open();
    return;
  }

  transport.open();
  this.setTransport(transport);
};

/**
 * Sets the current transport. Disables the existing one (if any).
 *
 * @api private
 */

Socket.prototype.setTransport = function(transport){
  debug('setting transport %s', transport.name);
  var self = this;

  if (this.transport) {
    debug('clearing existing transport %s', this.transport.name);
    this.transport.removeAllListeners();
  }

  // set up transport
  this.transport = transport;

  // set up transport listeners
  transport
  .on('drain', function(){
    self.onDrain();
  })
  .on('packet', function(packet){
    self.onPacket(packet);
  })
  .on('error', function(e){
    self.onError(e);
  })
  .on('close', function(){
    self.onClose('transport close');
  });
};

/**
 * Probes a transport.
 *
 * @param {String} transport name
 * @api private
 */

Socket.prototype.probe = function (name) {
  debug('probing transport "%s"', name);
  var transport = this.createTransport(name, { probe: 1 })
    , failed = false
    , self = this;

  Socket.priorWebsocketSuccess = false;

  function onTransportOpen(){
    if (self.onlyBinaryUpgrades) {
      var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
      failed = failed || upgradeLosesBinary;
    }
    if (failed) return;

    debug('probe transport "%s" opened', name);
    transport.send([{ type: 'ping', data: 'probe' }]);
    transport.once('packet', function (msg) {
      if (failed) return;
      if ('pong' == msg.type && 'probe' == msg.data) {
        debug('probe transport "%s" pong', name);
        self.upgrading = true;
        self.emit('upgrading', transport);
        if (!transport) return;
        Socket.priorWebsocketSuccess = 'websocket' == transport.name;

        debug('pausing current transport "%s"', self.transport.name);
        self.transport.pause(function () {
          if (failed) return;
          if ('closed' == self.readyState) return;
          debug('changing transport and sending upgrade packet');

          cleanup();

          self.setTransport(transport);
          transport.send([{ type: 'upgrade' }]);
          self.emit('upgrade', transport);
          transport = null;
          self.upgrading = false;
          self.flush();
        });
      } else {
        debug('probe transport "%s" failed', name);
        var err = new Error('probe error');
        err.transport = transport.name;
        self.emit('upgradeError', err);
      }
    });
  }

  function freezeTransport() {
    if (failed) return;

    // Any callback called by transport should be ignored since now
    failed = true;

    cleanup();

    transport.close();
    transport = null;
  }

  //Handle any error that happens while probing
  function onerror(err) {
    var error = new Error('probe error: ' + err);
    error.transport = transport.name;

    freezeTransport();

    debug('probe transport "%s" failed because of error: %s', name, err);

    self.emit('upgradeError', error);
  }

  function onTransportClose(){
    onerror("transport closed");
  }

  //When the socket is closed while we're probing
  function onclose(){
    onerror("socket closed");
  }

  //When the socket is upgraded while we're probing
  function onupgrade(to){
    if (transport && to.name != transport.name) {
      debug('"%s" works - aborting "%s"', to.name, transport.name);
      freezeTransport();
    }
  }

  //Remove all listeners on the transport and on self
  function cleanup(){
    transport.removeListener('open', onTransportOpen);
    transport.removeListener('error', onerror);
    transport.removeListener('close', onTransportClose);
    self.removeListener('close', onclose);
    self.removeListener('upgrading', onupgrade);
  }

  transport.once('open', onTransportOpen);
  transport.once('error', onerror);
  transport.once('close', onTransportClose);

  this.once('close', onclose);
  this.once('upgrading', onupgrade);

  transport.open();

};

/**
 * Called when connection is deemed open.
 *
 * @api public
 */

Socket.prototype.onOpen = function () {
  debug('socket open');
  this.readyState = 'open';
  Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
  this.emit('open');
  this.flush();

  // we check for `readyState` in case an `open`
  // listener already closed the socket
  if ('open' == this.readyState && this.upgrade && this.transport.pause) {
    debug('starting upgrade probes');
    for (var i = 0, l = this.upgrades.length; i < l; i++) {
      this.probe(this.upgrades[i]);
    }
  }
};

/**
 * Handles a packet.
 *
 * @api private
 */

Socket.prototype.onPacket = function (packet) {
  if ('opening' == this.readyState || 'open' == this.readyState) {
    debug('socket receive: type "%s", data "%s"', packet.type, packet.data);

    this.emit('packet', packet);

    // Socket is live - any packet counts
    this.emit('heartbeat');

    switch (packet.type) {
      case 'open':
        this.onHandshake(parsejson(packet.data));
        break;

      case 'pong':
        this.setPing();
        this.emit('pong');
        break;

      case 'error':
        var err = new Error('server error');
        err.code = packet.data;
        this.onError(err);
        break;

      case 'message':
        this.emit('data', packet.data);
        this.emit('message', packet.data);
        break;
    }
  } else {
    debug('packet received with socket readyState "%s"', this.readyState);
  }
};

/**
 * Called upon handshake completion.
 *
 * @param {Object} handshake obj
 * @api private
 */

Socket.prototype.onHandshake = function (data) {
  this.emit('handshake', data);
  this.id = data.sid;
  this.transport.query.sid = data.sid;
  this.upgrades = this.filterUpgrades(data.upgrades);
  this.pingInterval = data.pingInterval;
  this.pingTimeout = data.pingTimeout;
  this.onOpen();
  // In case open handler closes socket
  if  ('closed' == this.readyState) return;
  this.setPing();

  // Prolong liveness of socket on heartbeat
  this.removeListener('heartbeat', this.onHeartbeat);
  this.on('heartbeat', this.onHeartbeat);
};

/**
 * Resets ping timeout.
 *
 * @api private
 */

Socket.prototype.onHeartbeat = function (timeout) {
  clearTimeout(this.pingTimeoutTimer);
  var self = this;
  self.pingTimeoutTimer = setTimeout(function () {
    if ('closed' == self.readyState) return;
    self.onClose('ping timeout');
  }, timeout || (self.pingInterval + self.pingTimeout));
};

/**
 * Pings server every `this.pingInterval` and expects response
 * within `this.pingTimeout` or closes connection.
 *
 * @api private
 */

Socket.prototype.setPing = function () {
  var self = this;
  clearTimeout(self.pingIntervalTimer);
  self.pingIntervalTimer = setTimeout(function () {
    debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
    self.ping();
    self.onHeartbeat(self.pingTimeout);
  }, self.pingInterval);
};

/**
* Sends a ping packet.
*
* @api private
*/

Socket.prototype.ping = function () {
  var self = this;
  this.sendPacket('ping', function(){
    self.emit('ping');
  });
};

/**
 * Called on `drain` event
 *
 * @api private
 */

Socket.prototype.onDrain = function() {
  this.writeBuffer.splice(0, this.prevBufferLen);

  // setting prevBufferLen = 0 is very important
  // for example, when upgrading, upgrade packet is sent over,
  // and a nonzero prevBufferLen could cause problems on `drain`
  this.prevBufferLen = 0;

  if (0 === this.writeBuffer.length) {
    this.emit('drain');
  } else {
    this.flush();
  }
};

/**
 * Flush write buffers.
 *
 * @api private
 */

Socket.prototype.flush = function () {
  if ('closed' != this.readyState && this.transport.writable &&
    !this.upgrading && this.writeBuffer.length) {
    debug('flushing %d packets in socket', this.writeBuffer.length);
    this.transport.send(this.writeBuffer);
    // keep track of current length of writeBuffer
    // splice writeBuffer and callbackBuffer on `drain`
    this.prevBufferLen = this.writeBuffer.length;
    this.emit('flush');
  }
};

/**
 * Sends a message.
 *
 * @param {String} message.
 * @param {Function} callback function.
 * @param {Object} options.
 * @return {Socket} for chaining.
 * @api public
 */

Socket.prototype.write =
Socket.prototype.send = function (msg, options, fn) {
  this.sendPacket('message', msg, options, fn);
  return this;
};

/**
 * Sends a packet.
 *
 * @param {String} packet type.
 * @param {String} data.
 * @param {Object} options.
 * @param {Function} callback function.
 * @api private
 */

Socket.prototype.sendPacket = function (type, data, options, fn) {
  if('function' == typeof data) {
    fn = data;
    data = undefined;
  }

  if ('function' == typeof options) {
    fn = options;
    options = null;
  }

  if ('closing' == this.readyState || 'closed' == this.readyState) {
    return;
  }

  options = options || {};
  options.compress = false !== options.compress;

  var packet = {
    type: type,
    data: data,
    options: options
  };
  this.emit('packetCreate', packet);
  this.writeBuffer.push(packet);
  if (fn) this.once('flush', fn);
  this.flush();
};

/**
 * Closes the connection.
 *
 * @api private
 */

Socket.prototype.close = function () {
  if ('opening' == this.readyState || 'open' == this.readyState) {
    this.readyState = 'closing';

    var self = this;

    if (this.writeBuffer.length) {
      this.once('drain', function() {
        if (this.upgrading) {
          waitForUpgrade();
        } else {
          close();
        }
      });
    } else if (this.upgrading) {
      waitForUpgrade();
    } else {
      close();
    }
  }

  function close() {
    self.onClose('forced close');
    debug('socket closing - telling transport to close');
    self.transport.close();
  }

  function cleanupAndClose() {
    self.removeListener('upgrade', cleanupAndClose);
    self.removeListener('upgradeError', cleanupAndClose);
    close();
  }

  function waitForUpgrade() {
    // wait for upgrade to finish since we can't send packets while pausing a transport
    self.once('upgrade', cleanupAndClose);
    self.once('upgradeError', cleanupAndClose);
  }

  return this;
};

/**
 * Called upon transport error
 *
 * @api private
 */

Socket.prototype.onError = function (err) {
  debug('socket error %j', err);
  Socket.priorWebsocketSuccess = false;
  this.emit('error', err);
  this.onClose('transport error', err);
};

/**
 * Called upon transport close.
 *
 * @api private
 */

Socket.prototype.onClose = function (reason, desc) {
  if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
    debug('socket close with reason: "%s"', reason);
    var self = this;

    // clear timers
    clearTimeout(this.pingIntervalTimer);
    clearTimeout(this.pingTimeoutTimer);

    // stop event from firing again for transport
    this.transport.removeAllListeners('close');

    // ensure transport won't stay open
    this.transport.close();

    // ignore further transport communication
    this.transport.removeAllListeners();

    // set ready state
    this.readyState = 'closed';

    // clear session id
    this.id = null;

    // emit close event
    this.emit('close', reason, desc);

    // clean buffers after, so users can still
    // grab the buffers on `close` event
    self.writeBuffer = [];
    self.prevBufferLen = 0;
  }
};

/**
 * Filters upgrades, returning only those matching client transports.
 *
 * @param {Array} server upgrades
 * @api private
 *
 */

Socket.prototype.filterUpgrades = function (upgrades) {
  var filteredUpgrades = [];
  for (var i = 0, j = upgrades.length; i<j; i++) {
    if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
  }
  return filteredUpgrades;
};

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./transport":3,"./transports":4,"component-emitter":10,"debug":12,"engine.io-parser":15,"indexof":25,"parsejson":26,"parseqs":27,"parseuri":28}],3:[function(_dereq_,module,exports){
/**
 * Module dependencies.
 */

var parser = _dereq_('engine.io-parser');
var Emitter = _dereq_('component-emitter');

/**
 * Module exports.
 */

module.exports = Transport;

/**
 * Transport abstract constructor.
 *
 * @param {Object} options.
 * @api private
 */

function Transport (opts) {
  this.path = opts.path;
  this.hostname = opts.hostname;
  this.port = opts.port;
  this.secure = opts.secure;
  this.query = opts.query;
  this.timestampParam = opts.timestampParam;
  this.timestampRequests = opts.timestampRequests;
  this.readyState = '';
  this.agent = opts.agent || false;
  this.socket = opts.socket;
  this.enablesXDR = opts.enablesXDR;

  // SSL options for Node.js client
  this.pfx = opts.pfx;
  this.key = opts.key;
  this.passphrase = opts.passphrase;
  this.cert = opts.cert;
  this.ca = opts.ca;
  this.ciphers = opts.ciphers;
  this.rejectUnauthorized = opts.rejectUnauthorized;

  // other options for Node.js client
  this.extraHeaders = opts.extraHeaders;
}

/**
 * Mix in `Emitter`.
 */

Emitter(Transport.prototype);

/**
 * Emits an error.
 *
 * @param {String} str
 * @return {Transport} for chaining
 * @api public
 */

Transport.prototype.onError = function (msg, desc) {
  var err = new Error(msg);
  err.type = 'TransportError';
  err.description = desc;
  this.emit('error', err);
  return this;
};

/**
 * Opens the transport.
 *
 * @api public
 */

Transport.prototype.open = function () {
  if ('closed' == this.readyState || '' == this.readyState) {
    this.readyState = 'opening';
    this.doOpen();
  }

  return this;
};

/**
 * Closes the transport.
 *
 * @api private
 */

Transport.prototype.close = function () {
  if ('opening' == this.readyState || 'open' == this.readyState) {
    this.doClose();
    this.onClose();
  }

  return this;
};

/**
 * Sends multiple packets.
 *
 * @param {Array} packets
 * @api private
 */

Transport.prototype.send = function(packets){
  if ('open' == this.readyState) {
    this.write(packets);
  } else {
    throw new Error('Transport not open');
  }
};

/**
 * Called upon open
 *
 * @api private
 */

Transport.prototype.onOpen = function () {
  this.readyState = 'open';
  this.writable = true;
  this.emit('open');
};

/**
 * Called with data.
 *
 * @param {String} data
 * @api private
 */

Transport.prototype.onData = function(data){
  var packet = parser.decodePacket(data, this.socket.binaryType);
  this.onPacket(packet);
};

/**
 * Called with a decoded packet.
 */

Transport.prototype.onPacket = function (packet) {
  this.emit('packet', packet);
};

/**
 * Called upon close.
 *
 * @api private
 */

Transport.prototype.onClose = function () {
  this.readyState = 'closed';
  this.emit('close');
};

},{"component-emitter":10,"engine.io-parser":15}],4:[function(_dereq_,module,exports){
(function (global){
/**
 * Module dependencies
 */

var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
var XHR = _dereq_('./polling-xhr');
var JSONP = _dereq_('./polling-jsonp');
var websocket = _dereq_('./websocket');

/**
 * Export transports.
 */

exports.polling = polling;
exports.websocket = websocket;

/**
 * Polling transport polymorphic constructor.
 * Decides on xhr vs jsonp based on feature detection.
 *
 * @api private
 */

function polling(opts){
  var xhr;
  var xd = false;
  var xs = false;
  var jsonp = false !== opts.jsonp;

  if (global.location) {
    var isSSL = 'https:' == location.protocol;
    var port = location.port;

    // some user agents have empty `location.port`
    if (!port) {
      port = isSSL ? 443 : 80;
    }

    xd = opts.hostname != location.hostname || port != opts.port;
    xs = opts.secure != isSSL;
  }

  opts.xdomain = xd;
  opts.xscheme = xs;
  xhr = new XMLHttpRequest(opts);

  if ('open' in xhr && !opts.forceJSONP) {
    return new XHR(opts);
  } else {
    if (!jsonp) throw new Error('JSONP disabled');
    return new JSONP(opts);
  }
}

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./polling-jsonp":5,"./polling-xhr":6,"./websocket":8,"xmlhttprequest-ssl":9}],5:[function(_dereq_,module,exports){
(function (global){

/**
 * Module requirements.
 */

var Polling = _dereq_('./polling');
var inherit = _dereq_('component-inherit');

/**
 * Module exports.
 */

module.exports = JSONPPolling;

/**
 * Cached regular expressions.
 */

var rNewline = /\n/g;
var rEscapedNewline = /\\n/g;

/**
 * Global JSONP callbacks.
 */

var callbacks;

/**
 * Callbacks count.
 */

var index = 0;

/**
 * Noop.
 */

function empty () { }

/**
 * JSONP Polling constructor.
 *
 * @param {Object} opts.
 * @api public
 */

function JSONPPolling (opts) {
  Polling.call(this, opts);

  this.query = this.query || {};

  // define global callbacks array if not present
  // we do this here (lazily) to avoid unneeded global pollution
  if (!callbacks) {
    // we need to consider multiple engines in the same page
    if (!global.___eio) global.___eio = [];
    callbacks = global.___eio;
  }

  // callback identifier
  this.index = callbacks.length;

  // add callback to jsonp global
  var self = this;
  callbacks.push(function (msg) {
    self.onData(msg);
  });

  // append to query string
  this.query.j = this.index;

  // prevent spurious errors from being emitted when the window is unloaded
  if (global.document && global.addEventListener) {
    global.addEventListener('beforeunload', function () {
      if (self.script) self.script.onerror = empty;
    }, false);
  }
}

/**
 * Inherits from Polling.
 */

inherit(JSONPPolling, Polling);

/*
 * JSONP only supports binary as base64 encoded strings
 */

JSONPPolling.prototype.supportsBinary = false;

/**
 * Closes the socket.
 *
 * @api private
 */

JSONPPolling.prototype.doClose = function () {
  if (this.script) {
    this.script.parentNode.removeChild(this.script);
    this.script = null;
  }

  if (this.form) {
    this.form.parentNode.removeChild(this.form);
    this.form = null;
    this.iframe = null;
  }

  Polling.prototype.doClose.call(this);
};

/**
 * Starts a poll cycle.
 *
 * @api private
 */

JSONPPolling.prototype.doPoll = function () {
  var self = this;
  var script = document.createElement('script');

  if (this.script) {
    this.script.parentNode.removeChild(this.script);
    this.script = null;
  }

  script.async = true;
  script.src = this.uri();
  script.onerror = function(e){
    self.onError('jsonp poll error',e);
  };

  var insertAt = document.getElementsByTagName('script')[0];
  if (insertAt) {
    insertAt.parentNode.insertBefore(script, insertAt);
  }
  else {
    (document.head || document.body).appendChild(script);
  }
  this.script = script;

  var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
  
  if (isUAgecko) {
    setTimeout(function () {
      var iframe = document.createElement('iframe');
      document.body.appendChild(iframe);
      document.body.removeChild(iframe);
    }, 100);
  }
};

/**
 * Writes with a hidden iframe.
 *
 * @param {String} data to send
 * @param {Function} called upon flush.
 * @api private
 */

JSONPPolling.prototype.doWrite = function (data, fn) {
  var self = this;

  if (!this.form) {
    var form = document.createElement('form');
    var area = document.createElement('textarea');
    var id = this.iframeId = 'eio_iframe_' + this.index;
    var iframe;

    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);

    this.form = form;
    this.area = area;
  }

  this.form.action = this.uri();

  function complete () {
    initIframe();
    fn();
  }

  function initIframe () {
    if (self.iframe) {
      try {
        self.form.removeChild(self.iframe);
      } catch (e) {
        self.onError('jsonp polling iframe removal error', e);
      }
    }

    try {
      // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
      var html = '<iframe src="javascript:0" name="'+ self.iframeId +'">';
      iframe = document.createElement(html);
    } catch (e) {
      iframe = document.createElement('iframe');
      iframe.name = self.iframeId;
      iframe.src = 'javascript:0';
    }

    iframe.id = self.iframeId;

    self.form.appendChild(iframe);
    self.iframe = iframe;
  }

  initIframe();

  // escape \n to prevent it from being converted into \r\n by some UAs
  // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
  data = data.replace(rEscapedNewline, '\\\n');
  this.area.value = data.replace(rNewline, '\\n');

  try {
    this.form.submit();
  } catch(e) {}

  if (this.iframe.attachEvent) {
    this.iframe.onreadystatechange = function(){
      if (self.iframe.readyState == 'complete') {
        complete();
      }
    };
  } else {
    this.iframe.onload = complete;
  }
};

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./polling":7,"component-inherit":11}],6:[function(_dereq_,module,exports){
(function (global){
/**
 * Module requirements.
 */

var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
var Polling = _dereq_('./polling');
var Emitter = _dereq_('component-emitter');
var inherit = _dereq_('component-inherit');
var debug = _dereq_('debug')('engine.io-client:polling-xhr');

/**
 * Module exports.
 */

module.exports = XHR;
module.exports.Request = Request;

/**
 * Empty function
 */

function empty(){}

/**
 * XHR Polling constructor.
 *
 * @param {Object} opts
 * @api public
 */

function XHR(opts){
  Polling.call(this, opts);

  if (global.location) {
    var isSSL = 'https:' == location.protocol;
    var port = location.port;

    // some user agents have empty `location.port`
    if (!port) {
      port = isSSL ? 443 : 80;
    }

    this.xd = opts.hostname != global.location.hostname ||
      port != opts.port;
    this.xs = opts.secure != isSSL;
  } else {
    this.extraHeaders = opts.extraHeaders;
  }
}

/**
 * Inherits from Polling.
 */

inherit(XHR, Polling);

/**
 * XHR supports binary
 */

XHR.prototype.supportsBinary = true;

/**
 * Creates a request.
 *
 * @param {String} method
 * @api private
 */

XHR.prototype.request = function(opts){
  opts = opts || {};
  opts.uri = this.uri();
  opts.xd = this.xd;
  opts.xs = this.xs;
  opts.agent = this.agent || false;
  opts.supportsBinary = this.supportsBinary;
  opts.enablesXDR = this.enablesXDR;

  // SSL options for Node.js client
  opts.pfx = this.pfx;
  opts.key = this.key;
  opts.passphrase = this.passphrase;
  opts.cert = this.cert;
  opts.ca = this.ca;
  opts.ciphers = this.ciphers;
  opts.rejectUnauthorized = this.rejectUnauthorized;

  // other options for Node.js client
  opts.extraHeaders = this.extraHeaders;

  return new Request(opts);
};

/**
 * Sends data.
 *
 * @param {String} data to send.
 * @param {Function} called upon flush.
 * @api private
 */

XHR.prototype.doWrite = function(data, fn){
  var isBinary = typeof data !== 'string' && data !== undefined;
  var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
  var self = this;
  req.on('success', fn);
  req.on('error', function(err){
    self.onError('xhr post error', err);
  });
  this.sendXhr = req;
};

/**
 * Starts a poll cycle.
 *
 * @api private
 */

XHR.prototype.doPoll = function(){
  debug('xhr poll');
  var req = this.request();
  var self = this;
  req.on('data', function(data){
    self.onData(data);
  });
  req.on('error', function(err){
    self.onError('xhr poll error', err);
  });
  this.pollXhr = req;
};

/**
 * Request constructor
 *
 * @param {Object} options
 * @api public
 */

function Request(opts){
  this.method = opts.method || 'GET';
  this.uri = opts.uri;
  this.xd = !!opts.xd;
  this.xs = !!opts.xs;
  this.async = false !== opts.async;
  this.data = undefined != opts.data ? opts.data : null;
  this.agent = opts.agent;
  this.isBinary = opts.isBinary;
  this.supportsBinary = opts.supportsBinary;
  this.enablesXDR = opts.enablesXDR;

  // SSL options for Node.js client
  this.pfx = opts.pfx;
  this.key = opts.key;
  this.passphrase = opts.passphrase;
  this.cert = opts.cert;
  this.ca = opts.ca;
  this.ciphers = opts.ciphers;
  this.rejectUnauthorized = opts.rejectUnauthorized;

  // other options for Node.js client
  this.extraHeaders = opts.extraHeaders;

  this.create();
}

/**
 * Mix in `Emitter`.
 */

Emitter(Request.prototype);

/**
 * Creates the XHR object and sends the request.
 *
 * @api private
 */

Request.prototype.create = function(){
  var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };

  // SSL options for Node.js client
  opts.pfx = this.pfx;
  opts.key = this.key;
  opts.passphrase = this.passphrase;
  opts.cert = this.cert;
  opts.ca = this.ca;
  opts.ciphers = this.ciphers;
  opts.rejectUnauthorized = this.rejectUnauthorized;

  var xhr = this.xhr = new XMLHttpRequest(opts);
  var self = this;

  try {
    debug('xhr open %s: %s', this.method, this.uri);
    xhr.open(this.method, this.uri, this.async);
    try {
      if (this.extraHeaders) {
        xhr.setDisableHeaderCheck(true);
        for (var i in this.extraHeaders) {
          if (this.extraHeaders.hasOwnProperty(i)) {
            xhr.setRequestHeader(i, this.extraHeaders[i]);
          }
        }
      }
    } catch (e) {}
    if (this.supportsBinary) {
      // This has to be done after open because Firefox is stupid
      // http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
      xhr.responseType = 'arraybuffer';
    }

    if ('POST' == this.method) {
      try {
        if (this.isBinary) {
          xhr.setRequestHeader('Content-type', 'application/octet-stream');
        } else {
          xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
        }
      } catch (e) {}
    }

    // ie6 check
    if ('withCredentials' in xhr) {
      xhr.withCredentials = true;
    }

    if (this.hasXDR()) {
      xhr.onload = function(){
        self.onLoad();
      };
      xhr.onerror = function(){
        self.onError(xhr.responseText);
      };
    } else {
      xhr.onreadystatechange = function(){
        if (4 != xhr.readyState) return;
        if (200 == xhr.status || 1223 == xhr.status) {
          self.onLoad();
        } else {
          // make sure the `error` event handler that's user-set
          // does not throw in the same tick and gets caught here
          setTimeout(function(){
            self.onError(xhr.status);
          }, 0);
        }
      };
    }

    debug('xhr data %s', this.data);
    xhr.send(this.data);
  } catch (e) {
    // Need to defer since .create() is called directly fhrom the constructor
    // and thus the 'error' event can only be only bound *after* this exception
    // occurs.  Therefore, also, we cannot throw here at all.
    setTimeout(function() {
      self.onError(e);
    }, 0);
    return;
  }

  if (global.document) {
    this.index = Request.requestsCount++;
    Request.requests[this.index] = this;
  }
};

/**
 * Called upon successful response.
 *
 * @api private
 */

Request.prototype.onSuccess = function(){
  this.emit('success');
  this.cleanup();
};

/**
 * Called if we have data.
 *
 * @api private
 */

Request.prototype.onData = function(data){
  this.emit('data', data);
  this.onSuccess();
};

/**
 * Called upon error.
 *
 * @api private
 */

Request.prototype.onError = function(err){
  this.emit('error', err);
  this.cleanup(true);
};

/**
 * Cleans up house.
 *
 * @api private
 */

Request.prototype.cleanup = function(fromError){
  if ('undefined' == typeof this.xhr || null === this.xhr) {
    return;
  }
  // xmlhttprequest
  if (this.hasXDR()) {
    this.xhr.onload = this.xhr.onerror = empty;
  } else {
    this.xhr.onreadystatechange = empty;
  }

  if (fromError) {
    try {
      this.xhr.abort();
    } catch(e) {}
  }

  if (global.document) {
    delete Request.requests[this.index];
  }

  this.xhr = null;
};

/**
 * Called upon load.
 *
 * @api private
 */

Request.prototype.onLoad = function(){
  var data;
  try {
    var contentType;
    try {
      contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
    } catch (e) {}
    if (contentType === 'application/octet-stream') {
      data = this.xhr.response;
    } else {
      if (!this.supportsBinary) {
        data = this.xhr.responseText;
      } else {
        try {
          data = String.fromCharCode.apply(null, new Uint8Array(this.xhr.response));
        } catch (e) {
          var ui8Arr = new Uint8Array(this.xhr.response);
          var dataArray = [];
          for (var idx = 0, length = ui8Arr.length; idx < length; idx++) {
            dataArray.push(ui8Arr[idx]);
          }

          data = String.fromCharCode.apply(null, dataArray);
        }
      }
    }
  } catch (e) {
    this.onError(e);
  }
  if (null != data) {
    this.onData(data);
  }
};

/**
 * Check if it has XDomainRequest.
 *
 * @api private
 */

Request.prototype.hasXDR = function(){
  return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
};

/**
 * Aborts the request.
 *
 * @api public
 */

Request.prototype.abort = function(){
  this.cleanup();
};

/**
 * Aborts pending requests when unloading the window. This is needed to prevent
 * memory leaks (e.g. when using IE) and to ensure that no spurious error is
 * emitted.
 */

if (global.document) {
  Request.requestsCount = 0;
  Request.requests = {};
  if (global.attachEvent) {
    global.attachEvent('onunload', unloadHandler);
  } else if (global.addEventListener) {
    global.addEventListener('beforeunload', unloadHandler, false);
  }
}

function unloadHandler() {
  for (var i in Request.requests) {
    if (Request.requests.hasOwnProperty(i)) {
      Request.requests[i].abort();
    }
  }
}

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./polling":7,"component-emitter":10,"component-inherit":11,"debug":12,"xmlhttprequest-ssl":9}],7:[function(_dereq_,module,exports){
/**
 * Module dependencies.
 */

var Transport = _dereq_('../transport');
var parseqs = _dereq_('parseqs');
var parser = _dereq_('engine.io-parser');
var inherit = _dereq_('component-inherit');
var yeast = _dereq_('yeast');
var debug = _dereq_('debug')('engine.io-client:polling');

/**
 * Module exports.
 */

module.exports = Polling;

/**
 * Is XHR2 supported?
 */

var hasXHR2 = (function() {
  var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
  var xhr = new XMLHttpRequest({ xdomain: false });
  return null != xhr.responseType;
})();

/**
 * Polling interface.
 *
 * @param {Object} opts
 * @api private
 */

function Polling(opts){
  var forceBase64 = (opts && opts.forceBase64);
  if (!hasXHR2 || forceBase64) {
    this.supportsBinary = false;
  }
  Transport.call(this, opts);
}

/**
 * Inherits from Transport.
 */

inherit(Polling, Transport);

/**
 * Transport name.
 */

Polling.prototype.name = 'polling';

/**
 * Opens the socket (triggers polling). We write a PING message to determine
 * when the transport is open.
 *
 * @api private
 */

Polling.prototype.doOpen = function(){
  this.poll();
};

/**
 * Pauses polling.
 *
 * @param {Function} callback upon buffers are flushed and transport is paused
 * @api private
 */

Polling.prototype.pause = function(onPause){
  var pending = 0;
  var self = this;

  this.readyState = 'pausing';

  function pause(){
    debug('paused');
    self.readyState = 'paused';
    onPause();
  }

  if (this.polling || !this.writable) {
    var total = 0;

    if (this.polling) {
      debug('we are currently polling - waiting to pause');
      total++;
      this.once('pollComplete', function(){
        debug('pre-pause polling complete');
        --total || pause();
      });
    }

    if (!this.writable) {
      debug('we are currently writing - waiting to pause');
      total++;
      this.once('drain', function(){
        debug('pre-pause writing complete');
        --total || pause();
      });
    }
  } else {
    pause();
  }
};

/**
 * Starts polling cycle.
 *
 * @api public
 */

Polling.prototype.poll = function(){
  debug('polling');
  this.polling = true;
  this.doPoll();
  this.emit('poll');
};

/**
 * Overloads onData to detect payloads.
 *
 * @api private
 */

Polling.prototype.onData = function(data){
  var self = this;
  debug('polling got data %s', data);
  var callback = function(packet, index, total) {
    // if its the first message we consider the transport open
    if ('opening' == self.readyState) {
      self.onOpen();
    }

    // if its a close packet, we close the ongoing requests
    if ('close' == packet.type) {
      self.onClose();
      return false;
    }

    // otherwise bypass onData and handle the message
    self.onPacket(packet);
  };

  // decode payload
  parser.decodePayload(data, this.socket.binaryType, callback);

  // if an event did not trigger closing
  if ('closed' != this.readyState) {
    // if we got data we're not polling
    this.polling = false;
    this.emit('pollComplete');

    if ('open' == this.readyState) {
      this.poll();
    } else {
      debug('ignoring poll - transport state "%s"', this.readyState);
    }
  }
};

/**
 * For polling, send a close packet.
 *
 * @api private
 */

Polling.prototype.doClose = function(){
  var self = this;

  function close(){
    debug('writing close packet');
    self.write([{ type: 'close' }]);
  }

  if ('open' == this.readyState) {
    debug('transport open - closing');
    close();
  } else {
    // in case we're trying to close while
    // handshaking is in progress (GH-164)
    debug('transport not open - deferring close');
    this.once('open', close);
  }
};

/**
 * Writes a packets payload.
 *
 * @param {Array} data packets
 * @param {Function} drain callback
 * @api private
 */

Polling.prototype.write = function(packets){
  var self = this;
  this.writable = false;
  var callbackfn = function() {
    self.writable = true;
    self.emit('drain');
  };

  var self = this;
  parser.encodePayload(packets, this.supportsBinary, function(data) {
    self.doWrite(data, callbackfn);
  });
};

/**
 * Generates uri for connection.
 *
 * @api private
 */

Polling.prototype.uri = function(){
  var query = this.query || {};
  var schema = this.secure ? 'https' : 'http';
  var port = '';

  // cache busting is forced
  if (false !== this.timestampRequests) {
    query[this.timestampParam] = yeast();
  }

  if (!this.supportsBinary && !query.sid) {
    query.b64 = 1;
  }

  query = parseqs.encode(query);

  // avoid port if default for schema
  if (this.port && (('https' == schema && this.port != 443) ||
     ('http' == schema && this.port != 80))) {
    port = ':' + this.port;
  }

  // prepend ? to query
  if (query.length) {
    query = '?' + query;
  }

  var ipv6 = this.hostname.indexOf(':') !== -1;
  return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
};

},{"../transport":3,"component-inherit":11,"debug":12,"engine.io-parser":15,"parseqs":27,"xmlhttprequest-ssl":9,"yeast":29}],8:[function(_dereq_,module,exports){
(function (global){
/**
 * Module dependencies.
 */

var Transport = _dereq_('../transport');
var parser = _dereq_('engine.io-parser');
var parseqs = _dereq_('parseqs');
var inherit = _dereq_('component-inherit');
var yeast = _dereq_('yeast');
var debug = _dereq_('debug')('engine.io-client:websocket');
var BrowserWebSocket = global.WebSocket || global.MozWebSocket;

/**
 * Get either the `WebSocket` or `MozWebSocket` globals
 * in the browser or the WebSocket-compatible interface
 * exposed by `ws` for Node environment.
 */

var WebSocket = BrowserWebSocket || (typeof window !== 'undefined' ? null : _dereq_('ws'));

/**
 * Module exports.
 */

module.exports = WS;

/**
 * WebSocket transport constructor.
 *
 * @api {Object} connection options
 * @api public
 */

function WS(opts){
  var forceBase64 = (opts && opts.forceBase64);
  if (forceBase64) {
    this.supportsBinary = false;
  }
  this.perMessageDeflate = opts.perMessageDeflate;
  Transport.call(this, opts);
}

/**
 * Inherits from Transport.
 */

inherit(WS, Transport);

/**
 * Transport name.
 *
 * @api public
 */

WS.prototype.name = 'websocket';

/*
 * WebSockets support binary
 */

WS.prototype.supportsBinary = true;

/**
 * Opens socket.
 *
 * @api private
 */

WS.prototype.doOpen = function(){
  if (!this.check()) {
    // let probe timeout
    return;
  }

  var self = this;
  var uri = this.uri();
  var protocols = void(0);
  var opts = {
    agent: this.agent,
    perMessageDeflate: this.perMessageDeflate
  };

  // SSL options for Node.js client
  opts.pfx = this.pfx;
  opts.key = this.key;
  opts.passphrase = this.passphrase;
  opts.cert = this.cert;
  opts.ca = this.ca;
  opts.ciphers = this.ciphers;
  opts.rejectUnauthorized = this.rejectUnauthorized;
  if (this.extraHeaders) {
    opts.headers = this.extraHeaders;
  }

  this.ws = BrowserWebSocket ? new WebSocket(uri) : new WebSocket(uri, protocols, opts);

  if (this.ws.binaryType === undefined) {
    this.supportsBinary = false;
  }

  if (this.ws.supports && this.ws.supports.binary) {
    this.supportsBinary = true;
    this.ws.binaryType = 'buffer';
  } else {
    this.ws.binaryType = 'arraybuffer';
  }

  this.addEventListeners();
};

/**
 * Adds event listeners to the socket
 *
 * @api private
 */

WS.prototype.addEventListeners = function(){
  var self = this;

  this.ws.onopen = function(){
    self.onOpen();
  };
  this.ws.onclose = function(){
    self.onClose();
  };
  this.ws.onmessage = function(ev){
    self.onData(ev.data);
  };
  this.ws.onerror = function(e){
    self.onError('websocket error', e);
  };
};

/**
 * Override `onData` to use a timer on iOS.
 * See: https://gist.github.com/mloughran/2052006
 *
 * @api private
 */

if ('undefined' != typeof navigator
  && /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
  WS.prototype.onData = function(data){
    var self = this;
    setTimeout(function(){
      Transport.prototype.onData.call(self, data);
    }, 0);
  };
}

/**
 * Writes data to socket.
 *
 * @param {Array} array of packets.
 * @api private
 */

WS.prototype.write = function(packets){
  var self = this;
  this.writable = false;

  // encodePacket efficient as it uses WS framing
  // no need for encodePayload
  var total = packets.length;
  for (var i = 0, l = total; i < l; i++) {
    (function(packet) {
      parser.encodePacket(packet, self.supportsBinary, function(data) {
        if (!BrowserWebSocket) {
          // always create a new object (GH-437)
          var opts = {};
          if (packet.options) {
            opts.compress = packet.options.compress;
          }

          if (self.perMessageDeflate) {
            var len = 'string' == typeof data ? global.Buffer.byteLength(data) : data.length;
            if (len < self.perMessageDeflate.threshold) {
              opts.compress = false;
            }
          }
        }

        //Sometimes the websocket has already been closed but the browser didn't
        //have a chance of informing us about it yet, in that case send will
        //throw an error
        try {
          if (BrowserWebSocket) {
            // TypeError is thrown when passing the second argument on Safari
            self.ws.send(data);
          } else {
            self.ws.send(data, opts);
          }
        } catch (e){
          debug('websocket closed before onclose event');
        }

        --total || done();
      });
    })(packets[i]);
  }

  function done(){
    self.emit('flush');

    // fake drain
    // defer to next tick to allow Socket to clear writeBuffer
    setTimeout(function(){
      self.writable = true;
      self.emit('drain');
    }, 0);
  }
};

/**
 * Called upon close
 *
 * @api private
 */

WS.prototype.onClose = function(){
  Transport.prototype.onClose.call(this);
};

/**
 * Closes socket.
 *
 * @api private
 */

WS.prototype.doClose = function(){
  if (typeof this.ws !== 'undefined') {
    this.ws.close();
  }
};

/**
 * Generates uri for connection.
 *
 * @api private
 */

WS.prototype.uri = function(){
  var query = this.query || {};
  var schema = this.secure ? 'wss' : 'ws';
  var port = '';

  // avoid port if default for schema
  if (this.port && (('wss' == schema && this.port != 443)
    || ('ws' == schema && this.port != 80))) {
    port = ':' + this.port;
  }

  // append timestamp to URI
  if (this.timestampRequests) {
    query[this.timestampParam] = yeast();
  }

  // communicate binary support capabilities
  if (!this.supportsBinary) {
    query.b64 = 1;
  }

  query = parseqs.encode(query);

  // prepend ? to query
  if (query.length) {
    query = '?' + query;
  }

  var ipv6 = this.hostname.indexOf(':') !== -1;
  return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
};

/**
 * Feature detection for WebSocket.
 *
 * @return {Boolean} whether this transport is available.
 * @api public
 */

WS.prototype.check = function(){
  return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
};

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"../transport":3,"component-inherit":11,"debug":12,"engine.io-parser":15,"parseqs":27,"ws":undefined,"yeast":29}],9:[function(_dereq_,module,exports){
// browser shim for xmlhttprequest module
var hasCORS = _dereq_('has-cors');

module.exports = function(opts) {
  var xdomain = opts.xdomain;

  // scheme must be same when usign XDomainRequest
  // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
  var xscheme = opts.xscheme;

  // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
  // https://github.com/Automattic/engine.io-client/pull/217
  var enablesXDR = opts.enablesXDR;

  // XMLHttpRequest can be disabled on IE
  try {
    if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
      return new XMLHttpRequest();
    }
  } catch (e) { }

  // Use XDomainRequest for IE8 if enablesXDR is true
  // because loading bar keeps flashing when using jsonp-polling
  // https://github.com/yujiosaka/socke.io-ie8-loading-example
  try {
    if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
      return new XDomainRequest();
    }
  } catch (e) { }

  if (!xdomain) {
    try {
      return new window[(['Active'].concat('Object').join('X'))]('Microsoft.XMLHTTP');
    } catch(e) { }
  }
}

},{"has-cors":24}],10:[function(_dereq_,module,exports){

/**
 * Expose `Emitter`.
 */

module.exports = Emitter;

/**
 * Initialize a new `Emitter`.
 *
 * @api public
 */

function Emitter(obj) {
  if (obj) return mixin(obj);
};

/**
 * Mixin the emitter properties.
 *
 * @param {Object} obj
 * @return {Object}
 * @api private
 */

function mixin(obj) {
  for (var key in Emitter.prototype) {
    obj[key] = Emitter.prototype[key];
  }
  return obj;
}

/**
 * Listen on the given `event` with `fn`.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.on =
Emitter.prototype.addEventListener = function(event, fn){
  this._callbacks = this._callbacks || {};
  (this._callbacks[event] = this._callbacks[event] || [])
    .push(fn);
  return this;
};

/**
 * Adds an `event` listener that will be invoked a single
 * time then automatically removed.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.once = function(event, fn){
  var self = this;
  this._callbacks = this._callbacks || {};

  function on() {
    self.off(event, on);
    fn.apply(this, arguments);
  }

  on.fn = fn;
  this.on(event, on);
  return this;
};

/**
 * Remove the given callback for `event` or all
 * registered callbacks.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.off =
Emitter.prototype.removeListener =
Emitter.prototype.removeAllListeners =
Emitter.prototype.removeEventListener = function(event, fn){
  this._callbacks = this._callbacks || {};

  // all
  if (0 == arguments.length) {
    this._callbacks = {};
    return this;
  }

  // specific event
  var callbacks = this._callbacks[event];
  if (!callbacks) return this;

  // remove all handlers
  if (1 == arguments.length) {
    delete this._callbacks[event];
    return this;
  }

  // remove specific handler
  var cb;
  for (var i = 0; i < callbacks.length; i++) {
    cb = callbacks[i];
    if (cb === fn || cb.fn === fn) {
      callbacks.splice(i, 1);
      break;
    }
  }
  return this;
};

/**
 * Emit `event` with the given args.
 *
 * @param {String} event
 * @param {Mixed} ...
 * @return {Emitter}
 */

Emitter.prototype.emit = function(event){
  this._callbacks = this._callbacks || {};
  var args = [].slice.call(arguments, 1)
    , callbacks = this._callbacks[event];

  if (callbacks) {
    callbacks = callbacks.slice(0);
    for (var i = 0, len = callbacks.length; i < len; ++i) {
      callbacks[i].apply(this, args);
    }
  }

  return this;
};

/**
 * Return array of callbacks for `event`.
 *
 * @param {String} event
 * @return {Array}
 * @api public
 */

Emitter.prototype.listeners = function(event){
  this._callbacks = this._callbacks || {};
  return this._callbacks[event] || [];
};

/**
 * Check if this emitter has `event` handlers.
 *
 * @param {String} event
 * @return {Boolean}
 * @api public
 */

Emitter.prototype.hasListeners = function(event){
  return !! this.listeners(event).length;
};

},{}],11:[function(_dereq_,module,exports){

module.exports = function(a, b){
  var fn = function(){};
  fn.prototype = b.prototype;
  a.prototype = new fn;
  a.prototype.constructor = a;
};
},{}],12:[function(_dereq_,module,exports){

/**
 * This is the web browser implementation of `debug()`.
 *
 * Expose `debug()` as the module.
 */

exports = module.exports = _dereq_('./debug');
exports.log = log;
exports.formatArgs = formatArgs;
exports.save = save;
exports.load = load;
exports.useColors = useColors;
exports.storage = 'undefined' != typeof chrome
               && 'undefined' != typeof chrome.storage
                  ? chrome.storage.local
                  : localstorage();

/**
 * Colors.
 */

exports.colors = [
  'lightseagreen',
  'forestgreen',
  'goldenrod',
  'dodgerblue',
  'darkorchid',
  'crimson'
];

/**
 * Currently only WebKit-based Web Inspectors, Firefox >= v31,
 * and the Firebug extension (any Firefox version) are known
 * to support "%c" CSS customizations.
 *
 * TODO: add a `localStorage` variable to explicitly enable/disable colors
 */

function useColors() {
  // is webkit? http://stackoverflow.com/a/16459606/376773
  return ('WebkitAppearance' in document.documentElement.style) ||
    // is firebug? http://stackoverflow.com/a/398120/376773
    (window.console && (console.firebug || (console.exception && console.table))) ||
    // is firefox >= v31?
    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
    (navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
}

/**
 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
 */

exports.formatters.j = function(v) {
  return JSON.stringify(v);
};


/**
 * Colorize log arguments if enabled.
 *
 * @api public
 */

function formatArgs() {
  var args = arguments;
  var useColors = this.useColors;

  args[0] = (useColors ? '%c' : '')
    + this.namespace
    + (useColors ? ' %c' : ' ')
    + args[0]
    + (useColors ? '%c ' : ' ')
    + '+' + exports.humanize(this.diff);

  if (!useColors) return args;

  var c = 'color: ' + this.color;
  args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));

  // the final "%c" is somewhat tricky, because there could be other
  // arguments passed either before or after the %c, so we need to
  // figure out the correct index to insert the CSS into
  var index = 0;
  var lastC = 0;
  args[0].replace(/%[a-z%]/g, function(match) {
    if ('%%' === match) return;
    index++;
    if ('%c' === match) {
      // we only are interested in the *last* %c
      // (the user may have provided their own)
      lastC = index;
    }
  });

  args.splice(lastC, 0, c);
  return args;
}

/**
 * Invokes `console.log()` when available.
 * No-op when `console.log` is not a "function".
 *
 * @api public
 */

function log() {
  // this hackery is required for IE8/9, where
  // the `console.log` function doesn't have 'apply'
  return 'object' === typeof console
    && console.log
    && Function.prototype.apply.call(console.log, console, arguments);
}

/**
 * Save `namespaces`.
 *
 * @param {String} namespaces
 * @api private
 */

function save(namespaces) {
  try {
    if (null == namespaces) {
      exports.storage.removeItem('debug');
    } else {
      exports.storage.debug = namespaces;
    }
  } catch(e) {}
}

/**
 * Load `namespaces`.
 *
 * @return {String} returns the previously persisted debug modes
 * @api private
 */

function load() {
  var r;
  try {
    r = exports.storage.debug;
  } catch(e) {}
  return r;
}

/**
 * Enable namespaces listed in `localStorage.debug` initially.
 */

exports.enable(load());

/**
 * Localstorage attempts to return the localstorage.
 *
 * This is necessary because safari throws
 * when a user disables cookies/localstorage
 * and you attempt to access it.
 *
 * @return {LocalStorage}
 * @api private
 */

function localstorage(){
  try {
    return window.localStorage;
  } catch (e) {}
}

},{"./debug":13}],13:[function(_dereq_,module,exports){

/**
 * This is the common logic for both the Node.js and web browser
 * implementations of `debug()`.
 *
 * Expose `debug()` as the module.
 */

exports = module.exports = debug;
exports.coerce = coerce;
exports.disable = disable;
exports.enable = enable;
exports.enabled = enabled;
exports.humanize = _dereq_('ms');

/**
 * The currently active debug mode names, and names to skip.
 */

exports.names = [];
exports.skips = [];

/**
 * Map of special "%n" handling functions, for the debug "format" argument.
 *
 * Valid key names are a single, lowercased letter, i.e. "n".
 */

exports.formatters = {};

/**
 * Previously assigned color.
 */

var prevColor = 0;

/**
 * Previous log timestamp.
 */

var prevTime;

/**
 * Select a color.
 *
 * @return {Number}
 * @api private
 */

function selectColor() {
  return exports.colors[prevColor++ % exports.colors.length];
}

/**
 * Create a debugger with the given `namespace`.
 *
 * @param {String} namespace
 * @return {Function}
 * @api public
 */

function debug(namespace) {

  // define the `disabled` version
  function disabled() {
  }
  disabled.enabled = false;

  // define the `enabled` version
  function enabled() {

    var self = enabled;

    // set `diff` timestamp
    var curr = +new Date();
    var ms = curr - (prevTime || curr);
    self.diff = ms;
    self.prev = prevTime;
    self.curr = curr;
    prevTime = curr;

    // add the `color` if not set
    if (null == self.useColors) self.useColors = exports.useColors();
    if (null == self.color && self.useColors) self.color = selectColor();

    var args = Array.prototype.slice.call(arguments);

    args[0] = exports.coerce(args[0]);

    if ('string' !== typeof args[0]) {
      // anything else let's inspect with %o
      args = ['%o'].concat(args);
    }

    // apply any `formatters` transformations
    var index = 0;
    args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
      // if we encounter an escaped % then don't increase the array index
      if (match === '%%') return match;
      index++;
      var formatter = exports.formatters[format];
      if ('function' === typeof formatter) {
        var val = args[index];
        match = formatter.call(self, val);

        // now we need to remove `args[index]` since it's inlined in the `format`
        args.splice(index, 1);
        index--;
      }
      return match;
    });

    if ('function' === typeof exports.formatArgs) {
      args = exports.formatArgs.apply(self, args);
    }
    var logFn = enabled.log || exports.log || console.log.bind(console);
    logFn.apply(self, args);
  }
  enabled.enabled = true;

  var fn = exports.enabled(namespace) ? enabled : disabled;

  fn.namespace = namespace;

  return fn;
}

/**
 * Enables a debug mode by namespaces. This can include modes
 * separated by a colon and wildcards.
 *
 * @param {String} namespaces
 * @api public
 */

function enable(namespaces) {
  exports.save(namespaces);

  var split = (namespaces || '').split(/[\s,]+/);
  var len = split.length;

  for (var i = 0; i < len; i++) {
    if (!split[i]) continue; // ignore empty strings
    namespaces = split[i].replace(/\*/g, '.*?');
    if (namespaces[0] === '-') {
      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
    } else {
      exports.names.push(new RegExp('^' + namespaces + '$'));
    }
  }
}

/**
 * Disable debug output.
 *
 * @api public
 */

function disable() {
  exports.enable('');
}

/**
 * Returns true if the given mode name is enabled, false otherwise.
 *
 * @param {String} name
 * @return {Boolean}
 * @api public
 */

function enabled(name) {
  var i, len;
  for (i = 0, len = exports.skips.length; i < len; i++) {
    if (exports.skips[i].test(name)) {
      return false;
    }
  }
  for (i = 0, len = exports.names.length; i < len; i++) {
    if (exports.names[i].test(name)) {
      return true;
    }
  }
  return false;
}

/**
 * Coerce `val`.
 *
 * @param {Mixed} val
 * @return {Mixed}
 * @api private
 */

function coerce(val) {
  if (val instanceof Error) return val.stack || val.message;
  return val;
}

},{"ms":14}],14:[function(_dereq_,module,exports){
/**
 * Helpers.
 */

var s = 1000;
var m = s * 60;
var h = m * 60;
var d = h * 24;
var y = d * 365.25;

/**
 * Parse or format the given `val`.
 *
 * Options:
 *
 *  - `long` verbose formatting [false]
 *
 * @param {String|Number} val
 * @param {Object} options
 * @return {String|Number}
 * @api public
 */

module.exports = function(val, options){
  options = options || {};
  if ('string' == typeof val) return parse(val);
  return options.long
    ? long(val)
    : short(val);
};

/**
 * Parse the given `str` and return milliseconds.
 *
 * @param {String} str
 * @return {Number}
 * @api private
 */

function parse(str) {
  str = '' + str;
  if (str.length > 10000) return;
  var match = /^((?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str);
  if (!match) return;
  var n = parseFloat(match[1]);
  var type = (match[2] || 'ms').toLowerCase();
  switch (type) {
    case 'years':
    case 'year':
    case 'yrs':
    case 'yr':
    case 'y':
      return n * y;
    case 'days':
    case 'day':
    case 'd':
      return n * d;
    case 'hours':
    case 'hour':
    case 'hrs':
    case 'hr':
    case 'h':
      return n * h;
    case 'minutes':
    case 'minute':
    case 'mins':
    case 'min':
    case 'm':
      return n * m;
    case 'seconds':
    case 'second':
    case 'secs':
    case 'sec':
    case 's':
      return n * s;
    case 'milliseconds':
    case 'millisecond':
    case 'msecs':
    case 'msec':
    case 'ms':
      return n;
  }
}

/**
 * Short format for `ms`.
 *
 * @param {Number} ms
 * @return {String}
 * @api private
 */

function short(ms) {
  if (ms >= d) return Math.round(ms / d) + 'd';
  if (ms >= h) return Math.round(ms / h) + 'h';
  if (ms >= m) return Math.round(ms / m) + 'm';
  if (ms >= s) return Math.round(ms / s) + 's';
  return ms + 'ms';
}

/**
 * Long format for `ms`.
 *
 * @param {Number} ms
 * @return {String}
 * @api private
 */

function long(ms) {
  return plural(ms, d, 'day')
    || plural(ms, h, 'hour')
    || plural(ms, m, 'minute')
    || plural(ms, s, 'second')
    || ms + ' ms';
}

/**
 * Pluralization helper.
 */

function plural(ms, n, name) {
  if (ms < n) return;
  if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
  return Math.ceil(ms / n) + ' ' + name + 's';
}

},{}],15:[function(_dereq_,module,exports){
(function (global){
/**
 * Module dependencies.
 */

var keys = _dereq_('./keys');
var hasBinary = _dereq_('has-binary');
var sliceBuffer = _dereq_('arraybuffer.slice');
var base64encoder = _dereq_('base64-arraybuffer');
var after = _dereq_('after');
var utf8 = _dereq_('utf8');

/**
 * Check if we are running an android browser. That requires us to use
 * ArrayBuffer with polling transports...
 *
 * http://ghinda.net/jpeg-blob-ajax-android/
 */

var isAndroid = navigator.userAgent.match(/Android/i);

/**
 * Check if we are running in PhantomJS.
 * Uploading a Blob with PhantomJS does not work correctly, as reported here:
 * https://github.com/ariya/phantomjs/issues/11395
 * @type boolean
 */
var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);

/**
 * When true, avoids using Blobs to encode payloads.
 * @type boolean
 */
var dontSendBlobs = isAndroid || isPhantomJS;

/**
 * Current protocol version.
 */

exports.protocol = 3;

/**
 * Packet types.
 */

var packets = exports.packets = {
    open:     0    // non-ws
  , close:    1    // non-ws
  , ping:     2
  , pong:     3
  , message:  4
  , upgrade:  5
  , noop:     6
};

var packetslist = keys(packets);

/**
 * Premade error packet.
 */

var err = { type: 'error', data: 'parser error' };

/**
 * Create a blob api even for blob builder when vendor prefixes exist
 */

var Blob = _dereq_('blob');

/**
 * Encodes a packet.
 *
 *     <packet type id> [ <data> ]
 *
 * Example:
 *
 *     5hello world
 *     3
 *     4
 *
 * Binary is encoded in an identical principle
 *
 * @api private
 */

exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
  if ('function' == typeof supportsBinary) {
    callback = supportsBinary;
    supportsBinary = false;
  }

  if ('function' == typeof utf8encode) {
    callback = utf8encode;
    utf8encode = null;
  }

  var data = (packet.data === undefined)
    ? undefined
    : packet.data.buffer || packet.data;

  if (global.ArrayBuffer && data instanceof ArrayBuffer) {
    return encodeArrayBuffer(packet, supportsBinary, callback);
  } else if (Blob && data instanceof global.Blob) {
    return encodeBlob(packet, supportsBinary, callback);
  }

  // might be an object with { base64: true, data: dataAsBase64String }
  if (data && data.base64) {
    return encodeBase64Object(packet, callback);
  }

  // Sending data as a utf-8 string
  var encoded = packets[packet.type];

  // data fragment is optional
  if (undefined !== packet.data) {
    encoded += utf8encode ? utf8.encode(String(packet.data)) : String(packet.data);
  }

  return callback('' + encoded);

};

function encodeBase64Object(packet, callback) {
  // packet data is an object { base64: true, data: dataAsBase64String }
  var message = 'b' + exports.packets[packet.type] + packet.data.data;
  return callback(message);
}

/**
 * Encode packet helpers for binary types
 */

function encodeArrayBuffer(packet, supportsBinary, callback) {
  if (!supportsBinary) {
    return exports.encodeBase64Packet(packet, callback);
  }

  var data = packet.data;
  var contentArray = new Uint8Array(data);
  var resultBuffer = new Uint8Array(1 + data.byteLength);

  resultBuffer[0] = packets[packet.type];
  for (var i = 0; i < contentArray.length; i++) {
    resultBuffer[i+1] = contentArray[i];
  }

  return callback(resultBuffer.buffer);
}

function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
  if (!supportsBinary) {
    return exports.encodeBase64Packet(packet, callback);
  }

  var fr = new FileReader();
  fr.onload = function() {
    packet.data = fr.result;
    exports.encodePacket(packet, supportsBinary, true, callback);
  };
  return fr.readAsArrayBuffer(packet.data);
}

function encodeBlob(packet, supportsBinary, callback) {
  if (!supportsBinary) {
    return exports.encodeBase64Packet(packet, callback);
  }

  if (dontSendBlobs) {
    return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
  }

  var length = new Uint8Array(1);
  length[0] = packets[packet.type];
  var blob = new Blob([length.buffer, packet.data]);

  return callback(blob);
}

/**
 * Encodes a packet with binary data in a base64 string
 *
 * @param {Object} packet, has `type` and `data`
 * @return {String} base64 encoded message
 */

exports.encodeBase64Packet = function(packet, callback) {
  var message = 'b' + exports.packets[packet.type];
  if (Blob && packet.data instanceof global.Blob) {
    var fr = new FileReader();
    fr.onload = function() {
      var b64 = fr.result.split(',')[1];
      callback(message + b64);
    };
    return fr.readAsDataURL(packet.data);
  }

  var b64data;
  try {
    b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
  } catch (e) {
    // iPhone Safari doesn't let you apply with typed arrays
    var typed = new Uint8Array(packet.data);
    var basic = new Array(typed.length);
    for (var i = 0; i < typed.length; i++) {
      basic[i] = typed[i];
    }
    b64data = String.fromCharCode.apply(null, basic);
  }
  message += global.btoa(b64data);
  return callback(message);
};

/**
 * Decodes a packet. Changes format to Blob if requested.
 *
 * @return {Object} with `type` and `data` (if any)
 * @api private
 */

exports.decodePacket = function (data, binaryType, utf8decode) {
  // String data
  if (typeof data == 'string' || data === undefined) {
    if (data.charAt(0) == 'b') {
      return exports.decodeBase64Packet(data.substr(1), binaryType);
    }

    if (utf8decode) {
      try {
        data = utf8.decode(data);
      } catch (e) {
        return err;
      }
    }
    var type = data.charAt(0);

    if (Number(type) != type || !packetslist[type]) {
      return err;
    }

    if (data.length > 1) {
      return { type: packetslist[type], data: data.substring(1) };
    } else {
      return { type: packetslist[type] };
    }
  }

  var asArray = new Uint8Array(data);
  var type = asArray[0];
  var rest = sliceBuffer(data, 1);
  if (Blob && binaryType === 'blob') {
    rest = new Blob([rest]);
  }
  return { type: packetslist[type], data: rest };
};

/**
 * Decodes a packet encoded in a base64 string
 *
 * @param {String} base64 encoded message
 * @return {Object} with `type` and `data` (if any)
 */

exports.decodeBase64Packet = function(msg, binaryType) {
  var type = packetslist[msg.charAt(0)];
  if (!global.ArrayBuffer) {
    return { type: type, data: { base64: true, data: msg.substr(1) } };
  }

  var data = base64encoder.decode(msg.substr(1));

  if (binaryType === 'blob' && Blob) {
    data = new Blob([data]);
  }

  return { type: type, data: data };
};

/**
 * Encodes multiple messages (payload).
 *
 *     <length>:data
 *
 * Example:
 *
 *     11:hello world2:hi
 *
 * If any contents are binary, they will be encoded as base64 strings. Base64
 * encoded strings are marked with a b before the length specifier
 *
 * @param {Array} packets
 * @api private
 */

exports.encodePayload = function (packets, supportsBinary, callback) {
  if (typeof supportsBinary == 'function') {
    callback = supportsBinary;
    supportsBinary = null;
  }

  var isBinary = hasBinary(packets);

  if (supportsBinary && isBinary) {
    if (Blob && !dontSendBlobs) {
      return exports.encodePayloadAsBlob(packets, callback);
    }

    return exports.encodePayloadAsArrayBuffer(packets, callback);
  }

  if (!packets.length) {
    return callback('0:');
  }

  function setLengthHeader(message) {
    return message.length + ':' + message;
  }

  function encodeOne(packet, doneCallback) {
    exports.encodePacket(packet, !isBinary ? false : supportsBinary, true, function(message) {
      doneCallback(null, setLengthHeader(message));
    });
  }

  map(packets, encodeOne, function(err, results) {
    return callback(results.join(''));
  });
};

/**
 * Async array map using after
 */

function map(ary, each, done) {
  var result = new Array(ary.length);
  var next = after(ary.length, done);

  var eachWithIndex = function(i, el, cb) {
    each(el, function(error, msg) {
      result[i] = msg;
      cb(error, result);
    });
  };

  for (var i = 0; i < ary.length; i++) {
    eachWithIndex(i, ary[i], next);
  }
}

/*
 * Decodes data when a payload is maybe expected. Possible binary contents are
 * decoded from their base64 representation
 *
 * @param {String} data, callback method
 * @api public
 */

exports.decodePayload = function (data, binaryType, callback) {
  if (typeof data != 'string') {
    return exports.decodePayloadAsBinary(data, binaryType, callback);
  }

  if (typeof binaryType === 'function') {
    callback = binaryType;
    binaryType = null;
  }

  var packet;
  if (data == '') {
    // parser error - ignoring payload
    return callback(err, 0, 1);
  }

  var length = ''
    , n, msg;

  for (var i = 0, l = data.length; i < l; i++) {
    var chr = data.charAt(i);

    if (':' != chr) {
      length += chr;
    } else {
      if ('' == length || (length != (n = Number(length)))) {
        // parser error - ignoring payload
        return callback(err, 0, 1);
      }

      msg = data.substr(i + 1, n);

      if (length != msg.length) {
        // parser error - ignoring payload
        return callback(err, 0, 1);
      }

      if (msg.length) {
        packet = exports.decodePacket(msg, binaryType, true);

        if (err.type == packet.type && err.data == packet.data) {
          // parser error in individual packet - ignoring payload
          return callback(err, 0, 1);
        }

        var ret = callback(packet, i + n, l);
        if (false === ret) return;
      }

      // advance cursor
      i += n;
      length = '';
    }
  }

  if (length != '') {
    // parser error - ignoring payload
    return callback(err, 0, 1);
  }

};

/**
 * Encodes multiple messages (payload) as binary.
 *
 * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
 * 255><data>
 *
 * Example:
 * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
 *
 * @param {Array} packets
 * @return {ArrayBuffer} encoded payload
 * @api private
 */

exports.encodePayloadAsArrayBuffer = function(packets, callback) {
  if (!packets.length) {
    return callback(new ArrayBuffer(0));
  }

  function encodeOne(packet, doneCallback) {
    exports.encodePacket(packet, true, true, function(data) {
      return doneCallback(null, data);
    });
  }

  map(packets, encodeOne, function(err, encodedPackets) {
    var totalLength = encodedPackets.reduce(function(acc, p) {
      var len;
      if (typeof p === 'string'){
        len = p.length;
      } else {
        len = p.byteLength;
      }
      return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
    }, 0);

    var resultArray = new Uint8Array(totalLength);

    var bufferIndex = 0;
    encodedPackets.forEach(function(p) {
      var isString = typeof p === 'string';
      var ab = p;
      if (isString) {
        var view = new Uint8Array(p.length);
        for (var i = 0; i < p.length; i++) {
          view[i] = p.charCodeAt(i);
        }
        ab = view.buffer;
      }

      if (isString) { // not true binary
        resultArray[bufferIndex++] = 0;
      } else { // true binary
        resultArray[bufferIndex++] = 1;
      }

      var lenStr = ab.byteLength.toString();
      for (var i = 0; i < lenStr.length; i++) {
        resultArray[bufferIndex++] = parseInt(lenStr[i]);
      }
      resultArray[bufferIndex++] = 255;

      var view = new Uint8Array(ab);
      for (var i = 0; i < view.length; i++) {
        resultArray[bufferIndex++] = view[i];
      }
    });

    return callback(resultArray.buffer);
  });
};

/**
 * Encode as Blob
 */

exports.encodePayloadAsBlob = function(packets, callback) {
  function encodeOne(packet, doneCallback) {
    exports.encodePacket(packet, true, true, function(encoded) {
      var binaryIdentifier = new Uint8Array(1);
      binaryIdentifier[0] = 1;
      if (typeof encoded === 'string') {
        var view = new Uint8Array(encoded.length);
        for (var i = 0; i < encoded.length; i++) {
          view[i] = encoded.charCodeAt(i);
        }
        encoded = view.buffer;
        binaryIdentifier[0] = 0;
      }

      var len = (encoded instanceof ArrayBuffer)
        ? encoded.byteLength
        : encoded.size;

      var lenStr = len.toString();
      var lengthAry = new Uint8Array(lenStr.length + 1);
      for (var i = 0; i < lenStr.length; i++) {
        lengthAry[i] = parseInt(lenStr[i]);
      }
      lengthAry[lenStr.length] = 255;

      if (Blob) {
        var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
        doneCallback(null, blob);
      }
    });
  }

  map(packets, encodeOne, function(err, results) {
    return callback(new Blob(results));
  });
};

/*
 * Decodes data when a payload is maybe expected. Strings are decoded by
 * interpreting each byte as a key code for entries marked to start with 0. See
 * description of encodePayloadAsBinary
 *
 * @param {ArrayBuffer} data, callback method
 * @api public
 */

exports.decodePayloadAsBinary = function (data, binaryType, callback) {
  if (typeof binaryType === 'function') {
    callback = binaryType;
    binaryType = null;
  }

  var bufferTail = data;
  var buffers = [];

  var numberTooLong = false;
  while (bufferTail.byteLength > 0) {
    var tailArray = new Uint8Array(bufferTail);
    var isString = tailArray[0] === 0;
    var msgLength = '';

    for (var i = 1; ; i++) {
      if (tailArray[i] == 255) break;

      if (msgLength.length > 310) {
        numberTooLong = true;
        break;
      }

      msgLength += tailArray[i];
    }

    if(numberTooLong) return callback(err, 0, 1);

    bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
    msgLength = parseInt(msgLength);

    var msg = sliceBuffer(bufferTail, 0, msgLength);
    if (isString) {
      try {
        msg = String.fromCharCode.apply(null, new Uint8Array(msg));
      } catch (e) {
        // iPhone Safari doesn't let you apply to typed arrays
        var typed = new Uint8Array(msg);
        msg = '';
        for (var i = 0; i < typed.length; i++) {
          msg += String.fromCharCode(typed[i]);
        }
      }
    }

    buffers.push(msg);
    bufferTail = sliceBuffer(bufferTail, msgLength);
  }

  var total = buffers.length;
  buffers.forEach(function(buffer, i) {
    callback(exports.decodePacket(buffer, binaryType, true), i, total);
  });
};

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./keys":16,"after":17,"arraybuffer.slice":18,"base64-arraybuffer":19,"blob":20,"has-binary":21,"utf8":23}],16:[function(_dereq_,module,exports){

/**
 * Gets the keys for an object.
 *
 * @return {Array} keys
 * @api private
 */

module.exports = Object.keys || function keys (obj){
  var arr = [];
  var has = Object.prototype.hasOwnProperty;

  for (var i in obj) {
    if (has.call(obj, i)) {
      arr.push(i);
    }
  }
  return arr;
};

},{}],17:[function(_dereq_,module,exports){
module.exports = after

function after(count, callback, err_cb) {
    var bail = false
    err_cb = err_cb || noop
    proxy.count = count

    return (count === 0) ? callback() : proxy

    function proxy(err, result) {
        if (proxy.count <= 0) {
            throw new Error('after called too many times')
        }
        --proxy.count

        // after first error, rest are passed to err_cb
        if (err) {
            bail = true
            callback(err)
            // future error callbacks will go to error handler
            callback = err_cb
        } else if (proxy.count === 0 && !bail) {
            callback(null, result)
        }
    }
}

function noop() {}

},{}],18:[function(_dereq_,module,exports){
/**
 * An abstraction for slicing an arraybuffer even when
 * ArrayBuffer.prototype.slice is not supported
 *
 * @api public
 */

module.exports = function(arraybuffer, start, end) {
  var bytes = arraybuffer.byteLength;
  start = start || 0;
  end = end || bytes;

  if (arraybuffer.slice) { return arraybuffer.slice(start, end); }

  if (start < 0) { start += bytes; }
  if (end < 0) { end += bytes; }
  if (end > bytes) { end = bytes; }

  if (start >= bytes || start >= end || bytes === 0) {
    return new ArrayBuffer(0);
  }

  var abv = new Uint8Array(arraybuffer);
  var result = new Uint8Array(end - start);
  for (var i = start, ii = 0; i < end; i++, ii++) {
    result[ii] = abv[i];
  }
  return result.buffer;
};

},{}],19:[function(_dereq_,module,exports){
/*
 * base64-arraybuffer
 * https://github.com/niklasvh/base64-arraybuffer
 *
 * Copyright (c) 2012 Niklas von Hertzen
 * Licensed under the MIT license.
 */
(function(chars){
  "use strict";

  exports.encode = function(arraybuffer) {
    var bytes = new Uint8Array(arraybuffer),
    i, len = bytes.length, base64 = "";

    for (i = 0; i < len; i+=3) {
      base64 += chars[bytes[i] >> 2];
      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
      base64 += chars[bytes[i + 2] & 63];
    }

    if ((len % 3) === 2) {
      base64 = base64.substring(0, base64.length - 1) + "=";
    } else if (len % 3 === 1) {
      base64 = base64.substring(0, base64.length - 2) + "==";
    }

    return base64;
  };

  exports.decode =  function(base64) {
    var bufferLength = base64.length * 0.75,
    len = base64.length, i, p = 0,
    encoded1, encoded2, encoded3, encoded4;

    if (base64[base64.length - 1] === "=") {
      bufferLength--;
      if (base64[base64.length - 2] === "=") {
        bufferLength--;
      }
    }

    var arraybuffer = new ArrayBuffer(bufferLength),
    bytes = new Uint8Array(arraybuffer);

    for (i = 0; i < len; i+=4) {
      encoded1 = chars.indexOf(base64[i]);
      encoded2 = chars.indexOf(base64[i+1]);
      encoded3 = chars.indexOf(base64[i+2]);
      encoded4 = chars.indexOf(base64[i+3]);

      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
    }

    return arraybuffer;
  };
})("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");

},{}],20:[function(_dereq_,module,exports){
(function (global){
/**
 * Create a blob builder even when vendor prefixes exist
 */

var BlobBuilder = global.BlobBuilder
  || global.WebKitBlobBuilder
  || global.MSBlobBuilder
  || global.MozBlobBuilder;

/**
 * Check if Blob constructor is supported
 */

var blobSupported = (function() {
  try {
    var a = new Blob(['hi']);
    return a.size === 2;
  } catch(e) {
    return false;
  }
})();

/**
 * Check if Blob constructor supports ArrayBufferViews
 * Fails in Safari 6, so we need to map to ArrayBuffers there.
 */

var blobSupportsArrayBufferView = blobSupported && (function() {
  try {
    var b = new Blob([new Uint8Array([1,2])]);
    return b.size === 2;
  } catch(e) {
    return false;
  }
})();

/**
 * Check if BlobBuilder is supported
 */

var blobBuilderSupported = BlobBuilder
  && BlobBuilder.prototype.append
  && BlobBuilder.prototype.getBlob;

/**
 * Helper function that maps ArrayBufferViews to ArrayBuffers
 * Used by BlobBuilder constructor and old browsers that didn't
 * support it in the Blob constructor.
 */

function mapArrayBufferViews(ary) {
  for (var i = 0; i < ary.length; i++) {
    var chunk = ary[i];
    if (chunk.buffer instanceof ArrayBuffer) {
      var buf = chunk.buffer;

      // if this is a subarray, make a copy so we only
      // include the subarray region from the underlying buffer
      if (chunk.byteLength !== buf.byteLength) {
        var copy = new Uint8Array(chunk.byteLength);
        copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
        buf = copy.buffer;
      }

      ary[i] = buf;
    }
  }
}

function BlobBuilderConstructor(ary, options) {
  options = options || {};

  var bb = new BlobBuilder();
  mapArrayBufferViews(ary);

  for (var i = 0; i < ary.length; i++) {
    bb.append(ary[i]);
  }

  return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
};

function BlobConstructor(ary, options) {
  mapArrayBufferViews(ary);
  return new Blob(ary, options || {});
};

module.exports = (function() {
  if (blobSupported) {
    return blobSupportsArrayBufferView ? global.Blob : BlobConstructor;
  } else if (blobBuilderSupported) {
    return BlobBuilderConstructor;
  } else {
    return undefined;
  }
})();

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],21:[function(_dereq_,module,exports){
(function (global){

/*
 * Module requirements.
 */

var isArray = _dereq_('isarray');

/**
 * Module exports.
 */

module.exports = hasBinary;

/**
 * Checks for binary data.
 *
 * Right now only Buffer and ArrayBuffer are supported..
 *
 * @param {Object} anything
 * @api public
 */

function hasBinary(data) {

  function _hasBinary(obj) {
    if (!obj) return false;

    if ( (global.Buffer && global.Buffer.isBuffer(obj)) ||
         (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
         (global.Blob && obj instanceof Blob) ||
         (global.File && obj instanceof File)
        ) {
      return true;
    }

    if (isArray(obj)) {
      for (var i = 0; i < obj.length; i++) {
          if (_hasBinary(obj[i])) {
              return true;
          }
      }
    } else if (obj && 'object' == typeof obj) {
      if (obj.toJSON) {
        obj = obj.toJSON();
      }

      for (var key in obj) {
        if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
          return true;
        }
      }
    }

    return false;
  }

  return _hasBinary(data);
}

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"isarray":22}],22:[function(_dereq_,module,exports){
module.exports = Array.isArray || function (arr) {
  return Object.prototype.toString.call(arr) == '[object Array]';
};

},{}],23:[function(_dereq_,module,exports){
(function (global){
/*! https://mths.be/utf8js v2.0.0 by @mathias */
;(function(root) {

	// Detect free variables `exports`
	var freeExports = typeof exports == 'object' && exports;

	// Detect free variable `module`
	var freeModule = typeof module == 'object' && module &&
		module.exports == freeExports && module;

	// Detect free variable `global`, from Node.js or Browserified code,
	// and use it as `root`
	var freeGlobal = typeof global == 'object' && global;
	if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
		root = freeGlobal;
	}

	/*--------------------------------------------------------------------------*/

	var stringFromCharCode = String.fromCharCode;

	// Taken from https://mths.be/punycode
	function ucs2decode(string) {
		var output = [];
		var counter = 0;
		var length = string.length;
		var value;
		var extra;
		while (counter < length) {
			value = string.charCodeAt(counter++);
			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
				// high surrogate, and there is a next character
				extra = string.charCodeAt(counter++);
				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
				} else {
					// unmatched surrogate; only append this code unit, in case the next
					// code unit is the high surrogate of a surrogate pair
					output.push(value);
					counter--;
				}
			} else {
				output.push(value);
			}
		}
		return output;
	}

	// Taken from https://mths.be/punycode
	function ucs2encode(array) {
		var length = array.length;
		var index = -1;
		var value;
		var output = '';
		while (++index < length) {
			value = array[index];
			if (value > 0xFFFF) {
				value -= 0x10000;
				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
				value = 0xDC00 | value & 0x3FF;
			}
			output += stringFromCharCode(value);
		}
		return output;
	}

	function checkScalarValue(codePoint) {
		if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
			throw Error(
				'Lone surrogate U+' + codePoint.toString(16).toUpperCase() +
				' is not a scalar value'
			);
		}
	}
	/*--------------------------------------------------------------------------*/

	function createByte(codePoint, shift) {
		return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
	}

	function encodeCodePoint(codePoint) {
		if ((codePoint & 0xFFFFFF80) == 0) { // 1-byte sequence
			return stringFromCharCode(codePoint);
		}
		var symbol = '';
		if ((codePoint & 0xFFFFF800) == 0) { // 2-byte sequence
			symbol = stringFromCharCode(((codePoint >> 6) & 0x1F) | 0xC0);
		}
		else if ((codePoint & 0xFFFF0000) == 0) { // 3-byte sequence
			checkScalarValue(codePoint);
			symbol = stringFromCharCode(((codePoint >> 12) & 0x0F) | 0xE0);
			symbol += createByte(codePoint, 6);
		}
		else if ((codePoint & 0xFFE00000) == 0) { // 4-byte sequence
			symbol = stringFromCharCode(((codePoint >> 18) & 0x07) | 0xF0);
			symbol += createByte(codePoint, 12);
			symbol += createByte(codePoint, 6);
		}
		symbol += stringFromCharCode((codePoint & 0x3F) | 0x80);
		return symbol;
	}

	function utf8encode(string) {
		var codePoints = ucs2decode(string);
		var length = codePoints.length;
		var index = -1;
		var codePoint;
		var byteString = '';
		while (++index < length) {
			codePoint = codePoints[index];
			byteString += encodeCodePoint(codePoint);
		}
		return byteString;
	}

	/*--------------------------------------------------------------------------*/

	function readContinuationByte() {
		if (byteIndex >= byteCount) {
			throw Error('Invalid byte index');
		}

		var continuationByte = byteArray[byteIndex] & 0xFF;
		byteIndex++;

		if ((continuationByte & 0xC0) == 0x80) {
			return continuationByte & 0x3F;
		}

		// If we end up here, it’s not a continuation byte
		throw Error('Invalid continuation byte');
	}

	function decodeSymbol() {
		var byte1;
		var byte2;
		var byte3;
		var byte4;
		var codePoint;

		if (byteIndex > byteCount) {
			throw Error('Invalid byte index');
		}

		if (byteIndex == byteCount) {
			return false;
		}

		// Read first byte
		byte1 = byteArray[byteIndex] & 0xFF;
		byteIndex++;

		// 1-byte sequence (no continuation bytes)
		if ((byte1 & 0x80) == 0) {
			return byte1;
		}

		// 2-byte sequence
		if ((byte1 & 0xE0) == 0xC0) {
			var byte2 = readContinuationByte();
			codePoint = ((byte1 & 0x1F) << 6) | byte2;
			if (codePoint >= 0x80) {
				return codePoint;
			} else {
				throw Error('Invalid continuation byte');
			}
		}

		// 3-byte sequence (may include unpaired surrogates)
		if ((byte1 & 0xF0) == 0xE0) {
			byte2 = readContinuationByte();
			byte3 = readContinuationByte();
			codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
			if (codePoint >= 0x0800) {
				checkScalarValue(codePoint);
				return codePoint;
			} else {
				throw Error('Invalid continuation byte');
			}
		}

		// 4-byte sequence
		if ((byte1 & 0xF8) == 0xF0) {
			byte2 = readContinuationByte();
			byte3 = readContinuationByte();
			byte4 = readContinuationByte();
			codePoint = ((byte1 & 0x0F) << 0x12) | (byte2 << 0x0C) |
				(byte3 << 0x06) | byte4;
			if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
				return codePoint;
			}
		}

		throw Error('Invalid UTF-8 detected');
	}

	var byteArray;
	var byteCount;
	var byteIndex;
	function utf8decode(byteString) {
		byteArray = ucs2decode(byteString);
		byteCount = byteArray.length;
		byteIndex = 0;
		var codePoints = [];
		var tmp;
		while ((tmp = decodeSymbol()) !== false) {
			codePoints.push(tmp);
		}
		return ucs2encode(codePoints);
	}

	/*--------------------------------------------------------------------------*/

	var utf8 = {
		'version': '2.0.0',
		'encode': utf8encode,
		'decode': utf8decode
	};

	if (freeExports && !freeExports.nodeType) {
		if (freeModule) { // in Node.js or RingoJS v0.8.0+
			freeModule.exports = utf8;
		} else { // in Narwhal or RingoJS v0.7.0-
			var object = {};
			var hasOwnProperty = object.hasOwnProperty;
			for (var key in utf8) {
				hasOwnProperty.call(utf8, key) && (freeExports[key] = utf8[key]);
			}
		}
	} else { // in Rhino or a web browser
		root.utf8 = utf8;
	}

}(this));

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],24:[function(_dereq_,module,exports){

/**
 * Module exports.
 *
 * Logic borrowed from Modernizr:
 *
 *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
 */

try {
  module.exports = typeof XMLHttpRequest !== 'undefined' &&
    'withCredentials' in new XMLHttpRequest();
} catch (err) {
  // if XMLHttp support is disabled in IE then it will throw
  // when trying to create
  module.exports = false;
}

},{}],25:[function(_dereq_,module,exports){

var indexOf = [].indexOf;

module.exports = function(arr, obj){
  if (indexOf) return arr.indexOf(obj);
  for (var i = 0; i < arr.length; ++i) {
    if (arr[i] === obj) return i;
  }
  return -1;
};
},{}],26:[function(_dereq_,module,exports){
(function (global){
/**
 * JSON parse.
 *
 * @see Based on jQuery#parseJSON (MIT) and JSON2
 * @api private
 */

var rvalidchars = /^[\],:{}\s]*$/;
var rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
var rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
var rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g;
var rtrimLeft = /^\s+/;
var rtrimRight = /\s+$/;

module.exports = function parsejson(data) {
  if ('string' != typeof data || !data) {
    return null;
  }

  data = data.replace(rtrimLeft, '').replace(rtrimRight, '');

  // Attempt to parse using the native JSON parser first
  if (global.JSON && JSON.parse) {
    return JSON.parse(data);
  }

  if (rvalidchars.test(data.replace(rvalidescape, '@')
      .replace(rvalidtokens, ']')
      .replace(rvalidbraces, ''))) {
    return (new Function('return ' + data))();
  }
};
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],27:[function(_dereq_,module,exports){
/**
 * Compiles a querystring
 * Returns string representation of the object
 *
 * @param {Object}
 * @api private
 */

exports.encode = function (obj) {
  var str = '';

  for (var i in obj) {
    if (obj.hasOwnProperty(i)) {
      if (str.length) str += '&';
      str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
    }
  }

  return str;
};

/**
 * Parses a simple querystring into an object
 *
 * @param {String} qs
 * @api private
 */

exports.decode = function(qs){
  var qry = {};
  var pairs = qs.split('&');
  for (var i = 0, l = pairs.length; i < l; i++) {
    var pair = pairs[i].split('=');
    qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
  }
  return qry;
};

},{}],28:[function(_dereq_,module,exports){
/**
 * Parses an URI
 *
 * @author Steven Levithan <stevenlevithan.com> (MIT license)
 * @api private
 */

var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

var parts = [
    'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
];

module.exports = function parseuri(str) {
    var src = str,
        b = str.indexOf('['),
        e = str.indexOf(']');

    if (b != -1 && e != -1) {
        str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
    }

    var m = re.exec(str || ''),
        uri = {},
        i = 14;

    while (i--) {
        uri[parts[i]] = m[i] || '';
    }

    if (b != -1 && e != -1) {
        uri.source = src;
        uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
        uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
        uri.ipv6uri = true;
    }

    return uri;
};

},{}],29:[function(_dereq_,module,exports){
'use strict';

var alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split('')
  , length = 64
  , map = {}
  , seed = 0
  , i = 0
  , prev;

/**
 * Return a string representing the specified number.
 *
 * @param {Number} num The number to convert.
 * @returns {String} The string representation of the number.
 * @api public
 */
function encode(num) {
  var encoded = '';

  do {
    encoded = alphabet[num % length] + encoded;
    num = Math.floor(num / length);
  } while (num > 0);

  return encoded;
}

/**
 * Return the integer value specified by the given string.
 *
 * @param {String} str The string to convert.
 * @returns {Number} The integer value represented by the string.
 * @api public
 */
function decode(str) {
  var decoded = 0;

  for (i = 0; i < str.length; i++) {
    decoded = decoded * length + map[str.charAt(i)];
  }

  return decoded;
}

/**
 * Yeast: A tiny growing id generator.
 *
 * @returns {String} A unique id.
 * @api public
 */
function yeast() {
  var now = encode(+new Date());

  if (now !== prev) return seed = 0, prev = now;
  return now +'.'+ encode(seed++);
}

//
// Map each character to its index.
//
for (; i < length; i++) map[alphabet[i]] = i;

//
// Expose the `yeast`, `encode` and `decode` functions.
//
yeast.encode = encode;
yeast.decode = decode;
module.exports = yeast;

},{}],30:[function(_dereq_,module,exports){

module.exports =  _dereq_('./lib/');

},{"./lib/":1}]},{},[30])(30)
});
})(this["Primus"]);