socket.io/engine.io.js

!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.eio=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);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_('./lib/');

},{"./lib/":2}],2:[function(_dereq_,module,exports){

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

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

},{"./socket":3,"engine.io-parser":17}],3:[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":4,"./transports":5,"component-emitter":12,"debug":14,"engine.io-parser":17,"indexof":26,"parsejson":27,"parseqs":28,"parseuri":29}],4:[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":12,"engine.io-parser":17}],5:[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":6,"./polling-xhr":7,"./websocket":9,"xmlhttprequest-ssl":10}],6:[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];
  insertAt.parentNode.insertBefore(script, insertAt);
  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":8,"component-inherit":13}],7:[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":8,"component-emitter":12,"component-inherit":13,"debug":14,"xmlhttprequest-ssl":10}],8:[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":4,"component-inherit":13,"debug":14,"engine.io-parser":17,"parseqs":28,"xmlhttprequest-ssl":10,"yeast":47}],9:[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');

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

var WebSocket = global.WebSocket || global.MozWebSocket || _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 = 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;

  var isBrowserWebSocket = global.WebSocket && this.ws instanceof global.WebSocket;

  // 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 (!isBrowserWebSocket) {
          // 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 (isBrowserWebSocket) {
            // 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":4,"component-inherit":13,"debug":14,"engine.io-parser":17,"parseqs":28,"ws":30,"yeast":47}],10:[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 ActiveXObject('Microsoft.XMLHTTP');
    } catch(e) { }
  }
}

},{"has-cors":25}],11:[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 : {})
},{}],12:[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;
};

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

module.exports = function(a, b){
  var fn = function(){};
  fn.prototype = b.prototype;
  a.prototype = new fn;
  a.prototype.constructor = a;
};
},{}],14:[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":15}],15:[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":16}],16:[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';
}

},{}],17:[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":18,"after":19,"arraybuffer.slice":20,"base64-arraybuffer":21,"blob":11,"has-binary":22,"utf8":24}],18:[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;
};

},{}],19:[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() {}

},{}],20:[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;
};

},{}],21:[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+/");

},{}],22:[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":23}],23:[function(_dereq_,module,exports){
module.exports = Array.isArray || function (arr) {
  return Object.prototype.toString.call(arr) == '[object Array]';
};

},{}],24:[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
	};

	// Some AMD build optimizers, like r.js, check for specific condition patterns
	// like the following:
	if (
		typeof define == 'function' &&
		typeof define.amd == 'object' &&
		define.amd
	) {
		define(function() {
			return utf8;
		});
	}	else 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 : {})
},{}],25:[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;
}

},{}],26:[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;
};
},{}],27:[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 : {})
},{}],28:[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;
};

},{}],29:[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;
};

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

/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var WS = module.exports = _dereq_('./lib/WebSocket');

WS.Server = _dereq_('./lib/WebSocketServer');
WS.Sender = _dereq_('./lib/Sender');
WS.Receiver = _dereq_('./lib/Receiver');

/**
 * Create a new WebSocket server.
 *
 * @param {Object} options Server options
 * @param {Function} fn Optional connection listener.
 * @returns {WS.Server}
 * @api public
 */
WS.createServer = function createServer(options, fn) {
  var server = new WS.Server(options);

  if (typeof fn === 'function') {
    server.on('connection', fn);
  }

  return server;
};

/**
 * Create a new WebSocket connection.
 *
 * @param {String} address The URL/address we need to connect to.
 * @param {Function} fn Open listener.
 * @returns {WS}
 * @api public
 */
WS.connect = WS.createConnection = function connect(address, fn) {
  var client = new WS(address);

  if (typeof fn === 'function') {
    client.on('open', fn);
  }

  return client;
};

},{"./lib/Receiver":38,"./lib/Sender":40,"./lib/WebSocket":43,"./lib/WebSocketServer":44}],31:[function(_dereq_,module,exports){
(function (Buffer){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var util = _dereq_('util');

function BufferPool(initialSize, growStrategy, shrinkStrategy) {
  if (this instanceof BufferPool === false) {
    throw new TypeError("Classes can't be function-called");
  }

  if (typeof initialSize === 'function') {
    shrinkStrategy = growStrategy;
    growStrategy = initialSize;
    initialSize = 0;
  }
  else if (typeof initialSize === 'undefined') {
    initialSize = 0;
  }
  this._growStrategy = (growStrategy || function(db, size) {
    return db.used + size;
  }).bind(null, this);
  this._shrinkStrategy = (shrinkStrategy || function(db) {
    return initialSize;
  }).bind(null, this);
  this._buffer = initialSize ? new Buffer(initialSize) : null;
  this._offset = 0;
  this._used = 0;
  this._changeFactor = 0;
  this.__defineGetter__('size', function(){
    return this._buffer == null ? 0 : this._buffer.length;
  });
  this.__defineGetter__('used', function(){
    return this._used;
  });
}

BufferPool.prototype.get = function(length) {
  if (this._buffer == null || this._offset + length > this._buffer.length) {
    var newBuf = new Buffer(this._growStrategy(length));
    this._buffer = newBuf;
    this._offset = 0;
  }
  this._used += length;
  var buf = this._buffer.slice(this._offset, this._offset + length);
  this._offset += length;
  return buf;
}

BufferPool.prototype.reset = function(forceNewBuffer) {
  var len = this._shrinkStrategy();
  if (len < this.size) this._changeFactor -= 1;
  if (forceNewBuffer || this._changeFactor < -2) {
    this._changeFactor = 0;
    this._buffer = len ? new Buffer(len) : null;
  }
  this._offset = 0;
  this._used = 0;
}

module.exports = BufferPool;

}).call(this,_dereq_("buffer").Buffer)
},{"buffer":undefined,"util":undefined}],32:[function(_dereq_,module,exports){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

module.exports.BufferUtil = {
  merge: function(mergedBuffer, buffers) {
    var offset = 0;
    for (var i = 0, l = buffers.length; i < l; ++i) {
      var buf = buffers[i];
      buf.copy(mergedBuffer, offset);
      offset += buf.length;
    }
  },
  mask: function(source, mask, output, offset, length) {
    var maskNum = mask.readUInt32LE(0, true);
    var i = 0;
    for (; i < length - 3; i += 4) {
      var num = maskNum ^ source.readUInt32LE(i, true);
      if (num < 0) num = 4294967296 + num;
      output.writeUInt32LE(num, offset + i, true);
    }
    switch (length % 4) {
      case 3: output[offset + i + 2] = source[i + 2] ^ mask[2];
      case 2: output[offset + i + 1] = source[i + 1] ^ mask[1];
      case 1: output[offset + i] = source[i] ^ mask[0];
      case 0:;
    }
  },
  unmask: function(data, mask) {
    var maskNum = mask.readUInt32LE(0, true);
    var length = data.length;
    var i = 0;
    for (; i < length - 3; i += 4) {
      var num = maskNum ^ data.readUInt32LE(i, true);
      if (num < 0) num = 4294967296 + num;
      data.writeUInt32LE(num, i, true);
    }
    switch (length % 4) {
      case 3: data[i + 2] = data[i + 2] ^ mask[2];
      case 2: data[i + 1] = data[i + 1] ^ mask[1];
      case 1: data[i] = data[i] ^ mask[0];
      case 0:;
    }
  }
}

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

/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

try {
  module.exports = _dereq_('bufferutil');
} catch (e) {
  module.exports = _dereq_('./BufferUtil.fallback');
}

},{"./BufferUtil.fallback":32,"bufferutil":undefined}],34:[function(_dereq_,module,exports){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

module.exports = {
  isValidErrorCode: function(code) {
    return (code >= 1000 && code <= 1011 && code != 1004 && code != 1005 && code != 1006) ||
         (code >= 3000 && code <= 4999);
  },
  1000: 'normal',
  1001: 'going away',
  1002: 'protocol error',
  1003: 'unsupported data',
  1004: 'reserved',
  1005: 'reserved for extensions',
  1006: 'reserved for extensions',
  1007: 'inconsistent or invalid data',
  1008: 'policy violation',
  1009: 'message too big',
  1010: 'extension handshake missing',
  1011: 'an unexpected condition prevented the request from being fulfilled',
};
},{}],35:[function(_dereq_,module,exports){

var util = _dereq_('util');

/**
 * Module exports.
 */

exports.parse = parse;
exports.format = format;

/**
 * Parse extensions header value
 */

function parse(value) {
  value = value || '';

  var extensions = {};

  value.split(',').forEach(function(v) {
    var params = v.split(';');
    var token = params.shift().trim();
    var paramsList = extensions[token] = extensions[token] || [];
    var parsedParams = {};

    params.forEach(function(param) {
      var parts = param.trim().split('=');
      var key = parts[0];
      var value = parts[1];
      if (typeof value === 'undefined') {
        value = true;
      } else {
        // unquote value
        if (value[0] === '"') {
          value = value.slice(1);
        }
        if (value[value.length - 1] === '"') {
          value = value.slice(0, value.length - 1);
        }
      }
      (parsedParams[key] = parsedParams[key] || []).push(value);
    });

    paramsList.push(parsedParams);
  });

  return extensions;
}

/**
 * Format extensions header value
 */

function format(value) {
  return Object.keys(value).map(function(token) {
    var paramsList = value[token];
    if (!util.isArray(paramsList)) {
      paramsList = [paramsList];
    }
    return paramsList.map(function(params) {
      return [token].concat(Object.keys(params).map(function(k) {
        var p = params[k];
        if (!util.isArray(p)) p = [p];
        return p.map(function(v) {
          return v === true ? k : k + '=' + v;
        }).join('; ');
      })).join('; ');
    }).join(', ');
  }).join(', ');
}

},{"util":undefined}],36:[function(_dereq_,module,exports){
(function (Buffer){

var zlib = _dereq_('zlib');

var AVAILABLE_WINDOW_BITS = [8, 9, 10, 11, 12, 13, 14, 15];
var DEFAULT_WINDOW_BITS = 15;
var DEFAULT_MEM_LEVEL = 8;

PerMessageDeflate.extensionName = 'permessage-deflate';

/**
 * Per-message Compression Extensions implementation
 */

function PerMessageDeflate(options, isServer) {
  if (this instanceof PerMessageDeflate === false) {
    throw new TypeError("Classes can't be function-called");
  }

  this._options = options || {};
  this._isServer = !!isServer;
  this._inflate = null;
  this._deflate = null;
  this.params = null;
}

/**
 * Create extension parameters offer
 *
 * @api public
 */

PerMessageDeflate.prototype.offer = function() {
  var params = {};
  if (this._options.serverNoContextTakeover) {
    params.server_no_context_takeover = true;
  }
  if (this._options.clientNoContextTakeover) {
    params.client_no_context_takeover = true;
  }
  if (this._options.serverMaxWindowBits) {
    params.server_max_window_bits = this._options.serverMaxWindowBits;
  }
  if (this._options.clientMaxWindowBits) {
    params.client_max_window_bits = this._options.clientMaxWindowBits;
  } else if (this._options.clientMaxWindowBits == null) {
    params.client_max_window_bits = true;
  }
  return params;
};

/**
 * Accept extension offer
 *
 * @api public
 */

PerMessageDeflate.prototype.accept = function(paramsList) {
  paramsList = this.normalizeParams(paramsList);

  var params;
  if (this._isServer) {
    params = this.acceptAsServer(paramsList);
  } else {
    params = this.acceptAsClient(paramsList);
  }

  this.params = params;
  return params;
};

/**
 * Releases all resources used by the extension
 *
 * @api public
 */

PerMessageDeflate.prototype.cleanup = function() {
  if (this._inflate) {
    if (this._inflate.writeInProgress) {
      this._inflate.pendingClose = true;
    } else {
      if (this._inflate.close) this._inflate.close();
      this._inflate = null;
    }
  }
  if (this._deflate) {
    if (this._deflate.writeInProgress) {
      this._deflate.pendingClose = true;
    } else {
      if (this._deflate.close) this._deflate.close();
      this._deflate = null;
    }
  }
};

/**
 * Accept extension offer from client
 *
 * @api private
 */

PerMessageDeflate.prototype.acceptAsServer = function(paramsList) {
  var accepted = {};
  var result = paramsList.some(function(params) {
    accepted = {};
    if (this._options.serverNoContextTakeover === false && params.server_no_context_takeover) {
      return;
    }
    if (this._options.serverMaxWindowBits === false && params.server_max_window_bits) {
      return;
    }
    if (typeof this._options.serverMaxWindowBits === 'number' &&
        typeof params.server_max_window_bits === 'number' &&
        this._options.serverMaxWindowBits > params.server_max_window_bits) {
      return;
    }
    if (typeof this._options.clientMaxWindowBits === 'number' && !params.client_max_window_bits) {
      return;
    }

    if (this._options.serverNoContextTakeover || params.server_no_context_takeover) {
      accepted.server_no_context_takeover = true;
    }
    if (this._options.clientNoContextTakeover) {
      accepted.client_no_context_takeover = true;
    }
    if (this._options.clientNoContextTakeover !== false && params.client_no_context_takeover) {
      accepted.client_no_context_takeover = true;
    }
    if (typeof this._options.serverMaxWindowBits === 'number') {
      accepted.server_max_window_bits = this._options.serverMaxWindowBits;
    } else if (typeof params.server_max_window_bits === 'number') {
      accepted.server_max_window_bits = params.server_max_window_bits;
    }
    if (typeof this._options.clientMaxWindowBits === 'number') {
      accepted.client_max_window_bits = this._options.clientMaxWindowBits;
    } else if (this._options.clientMaxWindowBits !== false && typeof params.client_max_window_bits === 'number') {
      accepted.client_max_window_bits = params.client_max_window_bits;
    }
    return true;
  }, this);

  if (!result) {
    throw new Error('Doesn\'t support the offered configuration');
  }

  return accepted;
};

/**
 * Accept extension response from server
 *
 * @api privaye
 */

PerMessageDeflate.prototype.acceptAsClient = function(paramsList) {
  var params = paramsList[0];
  if (this._options.clientNoContextTakeover != null) {
    if (this._options.clientNoContextTakeover === false && params.client_no_context_takeover) {
      throw new Error('Invalid value for "client_no_context_takeover"');
    }
  }
  if (this._options.clientMaxWindowBits != null) {
    if (this._options.clientMaxWindowBits === false && params.client_max_window_bits) {
      throw new Error('Invalid value for "client_max_window_bits"');
    }
    if (typeof this._options.clientMaxWindowBits === 'number' &&
        (!params.client_max_window_bits || params.client_max_window_bits > this._options.clientMaxWindowBits)) {
      throw new Error('Invalid value for "client_max_window_bits"');
    }
  }
  return params;
};

/**
 * Normalize extensions parameters
 *
 * @api private
 */

PerMessageDeflate.prototype.normalizeParams = function(paramsList) {
  return paramsList.map(function(params) {
    Object.keys(params).forEach(function(key) {
      var value = params[key];
      if (value.length > 1) {
        throw new Error('Multiple extension parameters for ' + key);
      }

      value = value[0];

      switch (key) {
      case 'server_no_context_takeover':
      case 'client_no_context_takeover':
        if (value !== true) {
          throw new Error('invalid extension parameter value for ' + key + ' (' + value + ')');
        }
        params[key] = true;
        break;
      case 'server_max_window_bits':
      case 'client_max_window_bits':
        if (typeof value === 'string') {
          value = parseInt(value, 10);
          if (!~AVAILABLE_WINDOW_BITS.indexOf(value)) {
            throw new Error('invalid extension parameter value for ' + key + ' (' + value + ')');
          }
        }
        if (!this._isServer && value === true) {
          throw new Error('Missing extension parameter value for ' + key);
        }
        params[key] = value;
        break;
      default:
        throw new Error('Not defined extension parameter (' + key + ')');
      }
    }, this);
    return params;
  }, this);
};

/**
 * Decompress message
 *
 * @api public
 */

PerMessageDeflate.prototype.decompress = function (data, fin, callback) {
  var endpoint = this._isServer ? 'client' : 'server';

  if (!this._inflate) {
    var maxWindowBits = this.params[endpoint + '_max_window_bits'];
    this._inflate = zlib.createInflateRaw({
      windowBits: 'number' === typeof maxWindowBits ? maxWindowBits : DEFAULT_WINDOW_BITS
    });
  }
  this._inflate.writeInProgress = true;

  var self = this;
  var buffers = [];

  this._inflate.on('error', onError).on('data', onData);
  this._inflate.write(data);
  if (fin) {
    this._inflate.write(new Buffer([0x00, 0x00, 0xff, 0xff]));
  }
  this._inflate.flush(function() {
    cleanup();
    callback(null, Buffer.concat(buffers));
  });

  function onError(err) {
    cleanup();
    callback(err);
  }

  function onData(data) {
    buffers.push(data);
  }

  function cleanup() {
    if (!self._inflate) return;
    self._inflate.removeListener('error', onError);
    self._inflate.removeListener('data', onData);
    self._inflate.writeInProgress = false;
    if ((fin && self.params[endpoint + '_no_context_takeover']) || self._inflate.pendingClose) {
      if (self._inflate.close) self._inflate.close();
      self._inflate = null;
    }
  }
};

/**
 * Compress message
 *
 * @api public
 */

PerMessageDeflate.prototype.compress = function (data, fin, callback) {
  var endpoint = this._isServer ? 'server' : 'client';

  if (!this._deflate) {
    var maxWindowBits = this.params[endpoint + '_max_window_bits'];
    this._deflate = zlib.createDeflateRaw({
      flush: zlib.Z_SYNC_FLUSH,
      windowBits: 'number' === typeof maxWindowBits ? maxWindowBits : DEFAULT_WINDOW_BITS,
      memLevel: this._options.memLevel || DEFAULT_MEM_LEVEL
    });
  }
  this._deflate.writeInProgress = true;

  var self = this;
  var buffers = [];

  this._deflate.on('error', onError).on('data', onData);
  this._deflate.write(data);
  this._deflate.flush(function() {
    cleanup();
    var data = Buffer.concat(buffers);
    if (fin) {
      data = data.slice(0, data.length - 4);
    }
    callback(null, data);
  });

  function onError(err) {
    cleanup();
    callback(err);
  }

  function onData(data) {
    buffers.push(data);
  }

  function cleanup() {
    if (!self._deflate) return;
    self._deflate.removeListener('error', onError);
    self._deflate.removeListener('data', onData);
    self._deflate.writeInProgress = false;
    if ((fin && self.params[endpoint + '_no_context_takeover']) || self._deflate.pendingClose) {
      if (self._deflate.close) self._deflate.close();
      self._deflate = null;
    }
  }
};

module.exports = PerMessageDeflate;

}).call(this,_dereq_("buffer").Buffer)
},{"buffer":undefined,"zlib":undefined}],37:[function(_dereq_,module,exports){
(function (Buffer){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var util = _dereq_('util');

/**
 * State constants
 */

var EMPTY = 0
  , BODY = 1;
var BINARYLENGTH = 2
  , BINARYBODY = 3;

/**
 * Hixie Receiver implementation
 */

function Receiver () {
  if (this instanceof Receiver === false) {
    throw new TypeError("Classes can't be function-called");
  }

  this.state = EMPTY;
  this.buffers = [];
  this.messageEnd = -1;
  this.spanLength = 0;
  this.dead = false;

  this.onerror = function() {};
  this.ontext = function() {};
  this.onbinary = function() {};
  this.onclose = function() {};
  this.onping = function() {};
  this.onpong = function() {};
}

module.exports = Receiver;

/**
 * Add new data to the parser.
 *
 * @api public
 */

Receiver.prototype.add = function(data) {
  var self = this;
  function doAdd() {
    if (self.state === EMPTY) {
      if (data.length == 2 && data[0] == 0xFF && data[1] == 0x00) {
        self.reset();
        self.onclose();
        return;
      }
      if (data[0] === 0x80) {
        self.messageEnd = 0;
        self.state = BINARYLENGTH;
        data = data.slice(1);
      } else {

      if (data[0] !== 0x00) {
        self.error('payload must start with 0x00 byte', true);
        return;
      }
      data = data.slice(1);
      self.state = BODY;

      }
    }
    if (self.state === BINARYLENGTH) {
      var i = 0;
      while ((i < data.length) && (data[i] & 0x80)) {
        self.messageEnd = 128 * self.messageEnd + (data[i] & 0x7f);
        ++i;
      }
      if (i < data.length) {
        self.messageEnd = 128 * self.messageEnd + (data[i] & 0x7f);
        self.state = BINARYBODY;
        ++i;
      }
      if (i > 0)
        data = data.slice(i);
    }
    if (self.state === BINARYBODY) {
      var dataleft = self.messageEnd - self.spanLength;
      if (data.length >= dataleft) {
        // consume the whole buffer to finish the frame
        self.buffers.push(data);
        self.spanLength += dataleft;
        self.messageEnd = dataleft;
        return self.parse();
      }
      // frame's not done even if we consume it all
      self.buffers.push(data);
      self.spanLength += data.length;
      return;
    }
    self.buffers.push(data);
    if ((self.messageEnd = bufferIndex(data, 0xFF)) != -1) {
      self.spanLength += self.messageEnd;
      return self.parse();
    }
    else self.spanLength += data.length;
  }
  while(data) data = doAdd();
};

/**
 * Releases all resources used by the receiver.
 *
 * @api public
 */

Receiver.prototype.cleanup = function() {
  this.dead = true;
  this.state = EMPTY;
  this.buffers = [];
};

/**
 * Process buffered data.
 *
 * @api public
 */

Receiver.prototype.parse = function() {
  var output = new Buffer(this.spanLength);
  var outputIndex = 0;
  for (var bi = 0, bl = this.buffers.length; bi < bl - 1; ++bi) {
    var buffer = this.buffers[bi];
    buffer.copy(output, outputIndex);
    outputIndex += buffer.length;
  }
  var lastBuffer = this.buffers[this.buffers.length - 1];
  if (this.messageEnd > 0) lastBuffer.copy(output, outputIndex, 0, this.messageEnd);
  if (this.state !== BODY) --this.messageEnd;
  var tail = null;
  if (this.messageEnd < lastBuffer.length - 1) {
    tail = lastBuffer.slice(this.messageEnd + 1);
  }
  this.reset();
  this.ontext(output.toString('utf8'));
  return tail;
};

/**
 * Handles an error
 *
 * @api private
 */

Receiver.prototype.error = function (reason, terminate) {
  this.reset();
  this.onerror(reason, terminate);
  return this;
};

/**
 * Reset parser state
 *
 * @api private
 */

Receiver.prototype.reset = function (reason) {
  if (this.dead) return;
  this.state = EMPTY;
  this.buffers = [];
  this.messageEnd = -1;
  this.spanLength = 0;
};

/**
 * Internal api
 */

function bufferIndex(buffer, byte) {
  for (var i = 0, l = buffer.length; i < l; ++i) {
    if (buffer[i] === byte) return i;
  }
  return -1;
}

}).call(this,_dereq_("buffer").Buffer)
},{"buffer":undefined,"util":undefined}],38:[function(_dereq_,module,exports){
(function (Buffer){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var util = _dereq_('util')
  , Validation = _dereq_('./Validation').Validation
  , ErrorCodes = _dereq_('./ErrorCodes')
  , BufferPool = _dereq_('./BufferPool')
  , bufferUtil = _dereq_('./BufferUtil').BufferUtil
  , PerMessageDeflate = _dereq_('./PerMessageDeflate');

/**
 * HyBi Receiver implementation
 */

function Receiver (extensions) {
  if (this instanceof Receiver === false) {
    throw new TypeError("Classes can't be function-called");
  }

  // memory pool for fragmented messages
  var fragmentedPoolPrevUsed = -1;
  this.fragmentedBufferPool = new BufferPool(1024, function(db, length) {
    return db.used + length;
  }, function(db) {
    return fragmentedPoolPrevUsed = fragmentedPoolPrevUsed >= 0 ?
      Math.ceil((fragmentedPoolPrevUsed + db.used) / 2) :
      db.used;
  });

  // memory pool for unfragmented messages
  var unfragmentedPoolPrevUsed = -1;
  this.unfragmentedBufferPool = new BufferPool(1024, function(db, length) {
    return db.used + length;
  }, function(db) {
    return unfragmentedPoolPrevUsed = unfragmentedPoolPrevUsed >= 0 ?
      Math.ceil((unfragmentedPoolPrevUsed + db.used) / 2) :
      db.used;
  });

  this.extensions = extensions || {};
  this.state = {
    activeFragmentedOperation: null,
    lastFragment: false,
    masked: false,
    opcode: 0,
    fragmentedOperation: false
  };
  this.overflow = [];
  this.headerBuffer = new Buffer(10);
  this.expectOffset = 0;
  this.expectBuffer = null;
  this.expectHandler = null;
  this.currentMessage = [];
  this.messageHandlers = [];
  this.expectHeader(2, this.processPacket);
  this.dead = false;
  this.processing = false;

  this.onerror = function() {};
  this.ontext = function() {};
  this.onbinary = function() {};
  this.onclose = function() {};
  this.onping = function() {};
  this.onpong = function() {};
}

module.exports = Receiver;

/**
 * Add new data to the parser.
 *
 * @api public
 */

Receiver.prototype.add = function(data) {
  var dataLength = data.length;
  if (dataLength == 0) return;
  if (this.expectBuffer == null) {
    this.overflow.push(data);
    return;
  }
  var toRead = Math.min(dataLength, this.expectBuffer.length - this.expectOffset);
  fastCopy(toRead, data, this.expectBuffer, this.expectOffset);
  this.expectOffset += toRead;
  if (toRead < dataLength) {
    this.overflow.push(data.slice(toRead));
  }
  while (this.expectBuffer && this.expectOffset == this.expectBuffer.length) {
    var bufferForHandler = this.expectBuffer;
    this.expectBuffer = null;
    this.expectOffset = 0;
    this.expectHandler.call(this, bufferForHandler);
  }
};

/**
 * Releases all resources used by the receiver.
 *
 * @api public
 */

Receiver.prototype.cleanup = function() {
  this.dead = true;
  this.overflow = null;
  this.headerBuffer = null;
  this.expectBuffer = null;
  this.expectHandler = null;
  this.unfragmentedBufferPool = null;
  this.fragmentedBufferPool = null;
  this.state = null;
  this.currentMessage = null;
  this.onerror = null;
  this.ontext = null;
  this.onbinary = null;
  this.onclose = null;
  this.onping = null;
  this.onpong = null;
};

/**
 * Waits for a certain amount of header bytes to be available, then fires a callback.
 *
 * @api private
 */

Receiver.prototype.expectHeader = function(length, handler) {
  if (length == 0) {
    handler(null);
    return;
  }
  this.expectBuffer = this.headerBuffer.slice(this.expectOffset, this.expectOffset + length);
  this.expectHandler = handler;
  var toRead = length;
  while (toRead > 0 && this.overflow.length > 0) {
    var fromOverflow = this.overflow.pop();
    if (toRead < fromOverflow.length) this.overflow.push(fromOverflow.slice(toRead));
    var read = Math.min(fromOverflow.length, toRead);
    fastCopy(read, fromOverflow, this.expectBuffer, this.expectOffset);
    this.expectOffset += read;
    toRead -= read;
  }
};

/**
 * Waits for a certain amount of data bytes to be available, then fires a callback.
 *
 * @api private
 */

Receiver.prototype.expectData = function(length, handler) {
  if (length == 0) {
    handler(null);
    return;
  }
  this.expectBuffer = this.allocateFromPool(length, this.state.fragmentedOperation);
  this.expectHandler = handler;
  var toRead = length;
  while (toRead > 0 && this.overflow.length > 0) {
    var fromOverflow = this.overflow.pop();
    if (toRead < fromOverflow.length) this.overflow.push(fromOverflow.slice(toRead));
    var read = Math.min(fromOverflow.length, toRead);
    fastCopy(read, fromOverflow, this.expectBuffer, this.expectOffset);
    this.expectOffset += read;
    toRead -= read;
  }
};

/**
 * Allocates memory from the buffer pool.
 *
 * @api private
 */

Receiver.prototype.allocateFromPool = function(length, isFragmented) {
  return (isFragmented ? this.fragmentedBufferPool : this.unfragmentedBufferPool).get(length);
};

/**
 * Start processing a new packet.
 *
 * @api private
 */

Receiver.prototype.processPacket = function (data) {
  if (this.extensions[PerMessageDeflate.extensionName]) {
    if ((data[0] & 0x30) != 0) {
      this.error('reserved fields (2, 3) must be empty', 1002);
      return;
    }
  } else {
    if ((data[0] & 0x70) != 0) {
      this.error('reserved fields must be empty', 1002);
      return;
    }
  }
  this.state.lastFragment = (data[0] & 0x80) == 0x80;
  this.state.masked = (data[1] & 0x80) == 0x80;
  var compressed = (data[0] & 0x40) == 0x40;
  var opcode = data[0] & 0xf;
  if (opcode === 0) {
    if (compressed) {
      this.error('continuation frame cannot have the Per-message Compressed bits', 1002);
      return;
    }
    // continuation frame
    this.state.fragmentedOperation = true;
    this.state.opcode = this.state.activeFragmentedOperation;
    if (!(this.state.opcode == 1 || this.state.opcode == 2)) {
      this.error('continuation frame cannot follow current opcode', 1002);
      return;
    }
  }
  else {
    if (opcode < 3 && this.state.activeFragmentedOperation != null) {
      this.error('data frames after the initial data frame must have opcode 0', 1002);
      return;
    }
    if (opcode >= 8 && compressed) {
      this.error('control frames cannot have the Per-message Compressed bits', 1002);
      return;
    }
    this.state.compressed = compressed;
    this.state.opcode = opcode;
    if (this.state.lastFragment === false) {
      this.state.fragmentedOperation = true;
      this.state.activeFragmentedOperation = opcode;
    }
    else this.state.fragmentedOperation = false;
  }
  var handler = opcodes[this.state.opcode];
  if (typeof handler == 'undefined') this.error('no handler for opcode ' + this.state.opcode, 1002);
  else {
    handler.start.call(this, data);
  }
};

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

Receiver.prototype.endPacket = function() {
  if (!this.state.fragmentedOperation) this.unfragmentedBufferPool.reset(true);
  else if (this.state.lastFragment) this.fragmentedBufferPool.reset(true);
  this.expectOffset = 0;
  this.expectBuffer = null;
  this.expectHandler = null;
  if (this.state.lastFragment && this.state.opcode === this.state.activeFragmentedOperation) {
    // end current fragmented operation
    this.state.activeFragmentedOperation = null;
  }
  this.state.lastFragment = false;
  this.state.opcode = this.state.activeFragmentedOperation != null ? this.state.activeFragmentedOperation : 0;
  this.state.masked = false;
  this.expectHeader(2, this.processPacket);
};

/**
 * Reset the parser state.
 *
 * @api private
 */

Receiver.prototype.reset = function() {
  if (this.dead) return;
  this.state = {
    activeFragmentedOperation: null,
    lastFragment: false,
    masked: false,
    opcode: 0,
    fragmentedOperation: false
  };
  this.fragmentedBufferPool.reset(true);
  this.unfragmentedBufferPool.reset(true);
  this.expectOffset = 0;
  this.expectBuffer = null;
  this.expectHandler = null;
  this.overflow = [];
  this.currentMessage = [];
  this.messageHandlers = [];
};

/**
 * Unmask received data.
 *
 * @api private
 */

Receiver.prototype.unmask = function (mask, buf, binary) {
  if (mask != null && buf != null) bufferUtil.unmask(buf, mask);
  if (binary) return buf;
  return buf != null ? buf.toString('utf8') : '';
};

/**
 * Concatenates a list of buffers.
 *
 * @api private
 */

Receiver.prototype.concatBuffers = function(buffers) {
  var length = 0;
  for (var i = 0, l = buffers.length; i < l; ++i) length += buffers[i].length;
  var mergedBuffer = new Buffer(length);
  bufferUtil.merge(mergedBuffer, buffers);
  return mergedBuffer;
};

/**
 * Handles an error
 *
 * @api private
 */

Receiver.prototype.error = function (reason, protocolErrorCode) {
  this.reset();
  this.onerror(reason, protocolErrorCode);
  return this;
};

/**
 * Execute message handler buffers
 *
 * @api private
 */

Receiver.prototype.flush = function() {
  if (this.processing || this.dead) return;

  var handler = this.messageHandlers.shift();
  if (!handler) return;

  this.processing = true;
  var self = this;

  handler(function() {
    self.processing = false;
    self.flush();
  });
};

/**
 * Apply extensions to message
 *
 * @api private
 */

Receiver.prototype.applyExtensions = function(messageBuffer, fin, compressed, callback) {
  var self = this;
  if (compressed) {
    this.extensions[PerMessageDeflate.extensionName].decompress(messageBuffer, fin, function(err, buffer) {
      if (self.dead) return;
      if (err) {
        callback(new Error('invalid compressed data'));
        return;
      }
      callback(null, buffer);
    });
  } else {
    callback(null, messageBuffer);
  }
};

/**
 * Buffer utilities
 */

function readUInt16BE(start) {
  return (this[start]<<8) +
         this[start+1];
}

function readUInt32BE(start) {
  return (this[start]<<24) +
         (this[start+1]<<16) +
         (this[start+2]<<8) +
         this[start+3];
}

function fastCopy(length, srcBuffer, dstBuffer, dstOffset) {
  switch (length) {
    default: srcBuffer.copy(dstBuffer, dstOffset, 0, length); break;
    case 16: dstBuffer[dstOffset+15] = srcBuffer[15];
    case 15: dstBuffer[dstOffset+14] = srcBuffer[14];
    case 14: dstBuffer[dstOffset+13] = srcBuffer[13];
    case 13: dstBuffer[dstOffset+12] = srcBuffer[12];
    case 12: dstBuffer[dstOffset+11] = srcBuffer[11];
    case 11: dstBuffer[dstOffset+10] = srcBuffer[10];
    case 10: dstBuffer[dstOffset+9] = srcBuffer[9];
    case 9: dstBuffer[dstOffset+8] = srcBuffer[8];
    case 8: dstBuffer[dstOffset+7] = srcBuffer[7];
    case 7: dstBuffer[dstOffset+6] = srcBuffer[6];
    case 6: dstBuffer[dstOffset+5] = srcBuffer[5];
    case 5: dstBuffer[dstOffset+4] = srcBuffer[4];
    case 4: dstBuffer[dstOffset+3] = srcBuffer[3];
    case 3: dstBuffer[dstOffset+2] = srcBuffer[2];
    case 2: dstBuffer[dstOffset+1] = srcBuffer[1];
    case 1: dstBuffer[dstOffset] = srcBuffer[0];
  }
}

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

/**
 * Opcode handlers
 */

var opcodes = {
  // text
  '1': {
    start: function(data) {
      var self = this;
      // decode length
      var firstLength = data[1] & 0x7f;
      if (firstLength < 126) {
        opcodes['1'].getData.call(self, firstLength);
      }
      else if (firstLength == 126) {
        self.expectHeader(2, function(data) {
          opcodes['1'].getData.call(self, readUInt16BE.call(data, 0));
        });
      }
      else if (firstLength == 127) {
        self.expectHeader(8, function(data) {
          if (readUInt32BE.call(data, 0) != 0) {
            self.error('packets with length spanning more than 32 bit is currently not supported', 1008);
            return;
          }
          opcodes['1'].getData.call(self, readUInt32BE.call(data, 4));
        });
      }
    },
    getData: function(length) {
      var self = this;
      if (self.state.masked) {
        self.expectHeader(4, function(data) {
          var mask = data;
          self.expectData(length, function(data) {
            opcodes['1'].finish.call(self, mask, data);
          });
        });
      }
      else {
        self.expectData(length, function(data) {
          opcodes['1'].finish.call(self, null, data);
        });
      }
    },
    finish: function(mask, data) {
      var self = this;
      var packet = this.unmask(mask, data, true) || new Buffer(0);
      var state = clone(this.state);
      this.messageHandlers.push(function(callback) {
        self.applyExtensions(packet, state.lastFragment, state.compressed, function(err, buffer) {
          if (err) return self.error(err.message, 1007);
          if (buffer != null) self.currentMessage.push(buffer);

          if (state.lastFragment) {
            var messageBuffer = self.concatBuffers(self.currentMessage);
            self.currentMessage = [];
            if (!Validation.isValidUTF8(messageBuffer)) {
              self.error('invalid utf8 sequence', 1007);
              return;
            }
            self.ontext(messageBuffer.toString('utf8'), {masked: state.masked, buffer: messageBuffer});
          }
          callback();
        });
      });
      this.flush();
      this.endPacket();
    }
  },
  // binary
  '2': {
    start: function(data) {
      var self = this;
      // decode length
      var firstLength = data[1] & 0x7f;
      if (firstLength < 126) {
        opcodes['2'].getData.call(self, firstLength);
      }
      else if (firstLength == 126) {
        self.expectHeader(2, function(data) {
          opcodes['2'].getData.call(self, readUInt16BE.call(data, 0));
        });
      }
      else if (firstLength == 127) {
        self.expectHeader(8, function(data) {
          if (readUInt32BE.call(data, 0) != 0) {
            self.error('packets with length spanning more than 32 bit is currently not supported', 1008);
            return;
          }
          opcodes['2'].getData.call(self, readUInt32BE.call(data, 4, true));
        });
      }
    },
    getData: function(length) {
      var self = this;
      if (self.state.masked) {
        self.expectHeader(4, function(data) {
          var mask = data;
          self.expectData(length, function(data) {
            opcodes['2'].finish.call(self, mask, data);
          });
        });
      }
      else {
        self.expectData(length, function(data) {
          opcodes['2'].finish.call(self, null, data);
        });
      }
    },
    finish: function(mask, data) {
      var self = this;
      var packet = this.unmask(mask, data, true) || new Buffer(0);
      var state = clone(this.state);
      this.messageHandlers.push(function(callback) {
        self.applyExtensions(packet, state.lastFragment, state.compressed, function(err, buffer) {
          if (err) return self.error(err.message, 1007);
          if (buffer != null) self.currentMessage.push(buffer);
          if (state.lastFragment) {
            var messageBuffer = self.concatBuffers(self.currentMessage);
            self.currentMessage = [];
            self.onbinary(messageBuffer, {masked: state.masked, buffer: messageBuffer});
          }
          callback();
        });
      });
      this.flush();
      this.endPacket();
    }
  },
  // close
  '8': {
    start: function(data) {
      var self = this;
      if (self.state.lastFragment == false) {
        self.error('fragmented close is not supported', 1002);
        return;
      }

      // decode length
      var firstLength = data[1] & 0x7f;
      if (firstLength < 126) {
        opcodes['8'].getData.call(self, firstLength);
      }
      else {
        self.error('control frames cannot have more than 125 bytes of data', 1002);
      }
    },
    getData: function(length) {
      var self = this;
      if (self.state.masked) {
        self.expectHeader(4, function(data) {
          var mask = data;
          self.expectData(length, function(data) {
            opcodes['8'].finish.call(self, mask, data);
          });
        });
      }
      else {
        self.expectData(length, function(data) {
          opcodes['8'].finish.call(self, null, data);
        });
      }
    },
    finish: function(mask, data) {
      var self = this;
      data = self.unmask(mask, data, true);

      var state = clone(this.state);
      this.messageHandlers.push(function() {
        if (data && data.length == 1) {
          self.error('close packets with data must be at least two bytes long', 1002);
          return;
        }
        var code = data && data.length > 1 ? readUInt16BE.call(data, 0) : 1000;
        if (!ErrorCodes.isValidErrorCode(code)) {
          self.error('invalid error code', 1002);
          return;
        }
        var message = '';
        if (data && data.length > 2) {
          var messageBuffer = data.slice(2);
          if (!Validation.isValidUTF8(messageBuffer)) {
            self.error('invalid utf8 sequence', 1007);
            return;
          }
          message = messageBuffer.toString('utf8');
        }
        self.onclose(code, message, {masked: state.masked});
        self.reset();
      });
      this.flush();
    },
  },
  // ping
  '9': {
    start: function(data) {
      var self = this;
      if (self.state.lastFragment == false) {
        self.error('fragmented ping is not supported', 1002);
        return;
      }

      // decode length
      var firstLength = data[1] & 0x7f;
      if (firstLength < 126) {
        opcodes['9'].getData.call(self, firstLength);
      }
      else {
        self.error('control frames cannot have more than 125 bytes of data', 1002);
      }
    },
    getData: function(length) {
      var self = this;
      if (self.state.masked) {
        self.expectHeader(4, function(data) {
          var mask = data;
          self.expectData(length, function(data) {
            opcodes['9'].finish.call(self, mask, data);
          });
        });
      }
      else {
        self.expectData(length, function(data) {
          opcodes['9'].finish.call(self, null, data);
        });
      }
    },
    finish: function(mask, data) {
      var self = this;
      data = this.unmask(mask, data, true);
      var state = clone(this.state);
      this.messageHandlers.push(function(callback) {
        self.onping(data, {masked: state.masked, binary: true});
        callback();
      });
      this.flush();
      this.endPacket();
    }
  },
  // pong
  '10': {
    start: function(data) {
      var self = this;
      if (self.state.lastFragment == false) {
        self.error('fragmented pong is not supported', 1002);
        return;
      }

      // decode length
      var firstLength = data[1] & 0x7f;
      if (firstLength < 126) {
        opcodes['10'].getData.call(self, firstLength);
      }
      else {
        self.error('control frames cannot have more than 125 bytes of data', 1002);
      }
    },
    getData: function(length) {
      var self = this;
      if (this.state.masked) {
        this.expectHeader(4, function(data) {
          var mask = data;
          self.expectData(length, function(data) {
            opcodes['10'].finish.call(self, mask, data);
          });
        });
      }
      else {
        this.expectData(length, function(data) {
          opcodes['10'].finish.call(self, null, data);
        });
      }
    },
    finish: function(mask, data) {
      var self = this;
      data = self.unmask(mask, data, true);
      var state = clone(this.state);
      this.messageHandlers.push(function(callback) {
        self.onpong(data, {masked: state.masked, binary: true});
        callback();
      });
      this.flush();
      this.endPacket();
    }
  }
}

}).call(this,_dereq_("buffer").Buffer)
},{"./BufferPool":31,"./BufferUtil":33,"./ErrorCodes":34,"./PerMessageDeflate":36,"./Validation":42,"buffer":undefined,"util":undefined}],39:[function(_dereq_,module,exports){
(function (Buffer){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var events = _dereq_('events')
  , util = _dereq_('util')
  , EventEmitter = events.EventEmitter;

/**
 * Hixie Sender implementation
 */

function Sender(socket) {
  if (this instanceof Sender === false) {
    throw new TypeError("Classes can't be function-called");
  }

  events.EventEmitter.call(this);

  this.socket = socket;
  this.continuationFrame = false;
  this.isClosed = false;
}

module.exports = Sender;

/**
 * Inherits from EventEmitter.
 */

util.inherits(Sender, events.EventEmitter);

/**
 * Frames and writes data.
 *
 * @api public
 */

Sender.prototype.send = function(data, options, cb) {
  if (this.isClosed) return;

  var isString = typeof data == 'string'
    , length = isString ? Buffer.byteLength(data) : data.length
    , lengthbytes = (length > 127) ? 2 : 1 // assume less than 2**14 bytes
    , writeStartMarker = this.continuationFrame == false
    , writeEndMarker = !options || !(typeof options.fin != 'undefined' && !options.fin)
    , buffer = new Buffer((writeStartMarker ? ((options && options.binary) ? (1 + lengthbytes) : 1) : 0) + length + ((writeEndMarker && !(options && options.binary)) ? 1 : 0))
    , offset = writeStartMarker ? 1 : 0;

  if (writeStartMarker) {
    if (options && options.binary) {
      buffer.write('\x80', 'binary');
      // assume length less than 2**14 bytes
      if (lengthbytes > 1)
        buffer.write(String.fromCharCode(128+length/128), offset++, 'binary');
      buffer.write(String.fromCharCode(length&0x7f), offset++, 'binary');
    } else
      buffer.write('\x00', 'binary');
  }

  if (isString) buffer.write(data, offset, 'utf8');
  else data.copy(buffer, offset, 0);

  if (writeEndMarker) {
    if (options && options.binary) {
      // sending binary, not writing end marker
    } else
      buffer.write('\xff', offset + length, 'binary');
    this.continuationFrame = false;
  }
  else this.continuationFrame = true;

  try {
    this.socket.write(buffer, 'binary', cb);
  } catch (e) {
    this.error(e.toString());
  }
};

/**
 * Sends a close instruction to the remote party.
 *
 * @api public
 */

Sender.prototype.close = function(code, data, mask, cb) {
  if (this.isClosed) return;
  this.isClosed = true;
  try {
    if (this.continuationFrame) this.socket.write(new Buffer([0xff], 'binary'));
    this.socket.write(new Buffer([0xff, 0x00]), 'binary', cb);
  } catch (e) {
    this.error(e.toString());
  }
};

/**
 * Sends a ping message to the remote party. Not available for hixie.
 *
 * @api public
 */

Sender.prototype.ping = function(data, options) {};

/**
 * Sends a pong message to the remote party. Not available for hixie.
 *
 * @api public
 */

Sender.prototype.pong = function(data, options) {};

/**
 * Handles an error
 *
 * @api private
 */

Sender.prototype.error = function (reason) {
  this.emit('error', reason);
  return this;
};

}).call(this,_dereq_("buffer").Buffer)
},{"buffer":undefined,"events":undefined,"util":undefined}],40:[function(_dereq_,module,exports){
(function (Buffer){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var events = _dereq_('events')
  , util = _dereq_('util')
  , EventEmitter = events.EventEmitter
  , ErrorCodes = _dereq_('./ErrorCodes')
  , bufferUtil = _dereq_('./BufferUtil').BufferUtil
  , PerMessageDeflate = _dereq_('./PerMessageDeflate');

/**
 * HyBi Sender implementation
 */

function Sender(socket, extensions) {
  if (this instanceof Sender === false) {
    throw new TypeError("Classes can't be function-called");
  }

  events.EventEmitter.call(this);

  this._socket = socket;
  this.extensions = extensions || {};
  this.firstFragment = true;
  this.compress = false;
  this.messageHandlers = [];
  this.processing = false;
}

/**
 * Inherits from EventEmitter.
 */

util.inherits(Sender, events.EventEmitter);

/**
 * Sends a close instruction to the remote party.
 *
 * @api public
 */

Sender.prototype.close = function(code, data, mask, cb) {
  if (typeof code !== 'undefined') {
    if (typeof code !== 'number' ||
      !ErrorCodes.isValidErrorCode(code)) throw new Error('first argument must be a valid error code number');
  }
  code = code || 1000;
  var dataBuffer = new Buffer(2 + (data ? Buffer.byteLength(data) : 0));
  writeUInt16BE.call(dataBuffer, code, 0);
  if (dataBuffer.length > 2) dataBuffer.write(data, 2);

  var self = this;
  this.messageHandlers.push(function(callback) {
    self.frameAndSend(0x8, dataBuffer, true, mask);
    callback();
    if (typeof cb == 'function') cb();
  });
  this.flush();
};

/**
 * Sends a ping message to the remote party.
 *
 * @api public
 */

Sender.prototype.ping = function(data, options) {
  var mask = options && options.mask;
  var self = this;
  this.messageHandlers.push(function(callback) {
    self.frameAndSend(0x9, data || '', true, mask);
    callback();
  });
  this.flush();
};

/**
 * Sends a pong message to the remote party.
 *
 * @api public
 */

Sender.prototype.pong = function(data, options) {
  var mask = options && options.mask;
  var self = this;
  this.messageHandlers.push(function(callback) {
    self.frameAndSend(0xa, data || '', true, mask);
    callback();
  });
  this.flush();
};

/**
 * Sends text or binary data to the remote party.
 *
 * @api public
 */

Sender.prototype.send = function(data, options, cb) {
  var finalFragment = options && options.fin === false ? false : true;
  var mask = options && options.mask;
  var compress = options && options.compress;
  var opcode = options && options.binary ? 2 : 1;
  if (this.firstFragment === false) {
    opcode = 0;
    compress = false;
  } else {
    this.firstFragment = false;
    this.compress = compress;
  }
  if (finalFragment) this.firstFragment = true

  var compressFragment = this.compress;

  var self = this;
  this.messageHandlers.push(function(callback) {
    self.applyExtensions(data, finalFragment, compressFragment, function(err, data) {
      if (err) {
        if (typeof cb == 'function') cb(err);
        else self.emit('error', err);
        return;
      }
      self.frameAndSend(opcode, data, finalFragment, mask, compress, cb);
      callback();
    });
  });
  this.flush();
};

/**
 * Frames and sends a piece of data according to the HyBi WebSocket protocol.
 *
 * @api private
 */

Sender.prototype.frameAndSend = function(opcode, data, finalFragment, maskData, compressed, cb) {
  var canModifyData = false;

  if (!data) {
    try {
      this._socket.write(new Buffer([opcode | (finalFragment ? 0x80 : 0), 0 | (maskData ? 0x80 : 0)].concat(maskData ? [0, 0, 0, 0] : [])), 'binary', cb);
    }
    catch (e) {
      if (typeof cb == 'function') cb(e);
      else this.emit('error', e);
    }
    return;
  }

  if (!Buffer.isBuffer(data)) {
    canModifyData = true;
    if (data && (typeof data.byteLength !== 'undefined' || typeof data.buffer !== 'undefined')) {
      data = getArrayBuffer(data);
    } else {
      data = new Buffer(data);
    }
  }

  var dataLength = data.length
    , dataOffset = maskData ? 6 : 2
    , secondByte = dataLength;

  if (dataLength >= 65536) {
    dataOffset += 8;
    secondByte = 127;
  }
  else if (dataLength > 125) {
    dataOffset += 2;
    secondByte = 126;
  }

  var mergeBuffers = dataLength < 32768 || (maskData && !canModifyData);
  var totalLength = mergeBuffers ? dataLength + dataOffset : dataOffset;
  var outputBuffer = new Buffer(totalLength);
  outputBuffer[0] = finalFragment ? opcode | 0x80 : opcode;
  if (compressed) outputBuffer[0] |= 0x40;

  switch (secondByte) {
    case 126:
      writeUInt16BE.call(outputBuffer, dataLength, 2);
      break;
    case 127:
      writeUInt32BE.call(outputBuffer, 0, 2);
      writeUInt32BE.call(outputBuffer, dataLength, 6);
  }

  if (maskData) {
    outputBuffer[1] = secondByte | 0x80;
    var mask = this._randomMask || (this._randomMask = getRandomMask());
    outputBuffer[dataOffset - 4] = mask[0];
    outputBuffer[dataOffset - 3] = mask[1];
    outputBuffer[dataOffset - 2] = mask[2];
    outputBuffer[dataOffset - 1] = mask[3];
    if (mergeBuffers) {
      bufferUtil.mask(data, mask, outputBuffer, dataOffset, dataLength);
      try {
        this._socket.write(outputBuffer, 'binary', cb);
      }
      catch (e) {
        if (typeof cb == 'function') cb(e);
        else this.emit('error', e);
      }
    }
    else {
      bufferUtil.mask(data, mask, data, 0, dataLength);
      try {
        this._socket.write(outputBuffer, 'binary');
        this._socket.write(data, 'binary', cb);
      }
      catch (e) {
        if (typeof cb == 'function') cb(e);
        else this.emit('error', e);
      }
    }
  }
  else {
    outputBuffer[1] = secondByte;
    if (mergeBuffers) {
      data.copy(outputBuffer, dataOffset);
      try {
        this._socket.write(outputBuffer, 'binary', cb);
      }
      catch (e) {
        if (typeof cb == 'function') cb(e);
        else this.emit('error', e);
      }
    }
    else {
      try {
        this._socket.write(outputBuffer, 'binary');
        this._socket.write(data, 'binary', cb);
      }
      catch (e) {
        if (typeof cb == 'function') cb(e);
        else this.emit('error', e);
      }
    }
  }
};

/**
 * Execute message handler buffers
 *
 * @api private
 */

Sender.prototype.flush = function() {
  if (this.processing) return;

  var handler = this.messageHandlers.shift();
  if (!handler) return;

  this.processing = true;

  var self = this;

  handler(function() {
    self.processing = false;
    self.flush();
  });
};

/**
 * Apply extensions to message
 *
 * @api private
 */

Sender.prototype.applyExtensions = function(data, fin, compress, callback) {
  if (compress && data) {
    if ((data.buffer || data) instanceof ArrayBuffer) {
      data = getArrayBuffer(data);
    }
    this.extensions[PerMessageDeflate.extensionName].compress(data, fin, callback);
  } else {
    callback(null, data);
  }
};

module.exports = Sender;

function writeUInt16BE(value, offset) {
  this[offset] = (value & 0xff00)>>8;
  this[offset+1] = value & 0xff;
}

function writeUInt32BE(value, offset) {
  this[offset] = (value & 0xff000000)>>24;
  this[offset+1] = (value & 0xff0000)>>16;
  this[offset+2] = (value & 0xff00)>>8;
  this[offset+3] = value & 0xff;
}

function getArrayBuffer(data) {
  // data is either an ArrayBuffer or ArrayBufferView.
  var array = new Uint8Array(data.buffer || data)
    , l = data.byteLength || data.length
    , o = data.byteOffset || 0
    , buffer = new Buffer(l);
  for (var i = 0; i < l; ++i) {
    buffer[i] = array[o+i];
  }
  return buffer;
}

function getRandomMask() {
  return new Buffer([
    ~~(Math.random() * 255),
    ~~(Math.random() * 255),
    ~~(Math.random() * 255),
    ~~(Math.random() * 255)
  ]);
}

}).call(this,_dereq_("buffer").Buffer)
},{"./BufferUtil":33,"./ErrorCodes":34,"./PerMessageDeflate":36,"buffer":undefined,"events":undefined,"util":undefined}],41:[function(_dereq_,module,exports){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */
 
module.exports.Validation = {
  isValidUTF8: function(buffer) {
    return true;
  }
};


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

/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

try {
  module.exports = _dereq_('utf-8-validate');
} catch (e) {
  module.exports = _dereq_('./Validation.fallback');
}

},{"./Validation.fallback":41,"utf-8-validate":undefined}],43:[function(_dereq_,module,exports){
(function (process,Buffer){
'use strict';

/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var url = _dereq_('url')
  , util = _dereq_('util')
  , http = _dereq_('http')
  , https = _dereq_('https')
  , crypto = _dereq_('crypto')
  , stream = _dereq_('stream')
  , Ultron = _dereq_('ultron')
  , Options = _dereq_('options')
  , Sender = _dereq_('./Sender')
  , Receiver = _dereq_('./Receiver')
  , SenderHixie = _dereq_('./Sender.hixie')
  , ReceiverHixie = _dereq_('./Receiver.hixie')
  , Extensions = _dereq_('./Extensions')
  , PerMessageDeflate = _dereq_('./PerMessageDeflate')
  , EventEmitter = _dereq_('events').EventEmitter;

/**
 * Constants
 */

// Default protocol version

var protocolVersion = 13;

// Close timeout

var closeTimeout = 30 * 1000; // Allow 30 seconds to terminate the connection cleanly

/**
 * WebSocket implementation
 *
 * @constructor
 * @param {String} address Connection address.
 * @param {String|Array} protocols WebSocket protocols.
 * @param {Object} options Additional connection options.
 * @api public
 */
function WebSocket(address, protocols, options) {
  if (this instanceof WebSocket === false) {
    return new WebSocket(address, protocols, options);
  }

  EventEmitter.call(this);

  if (protocols && !Array.isArray(protocols) && 'object' === typeof protocols) {
    // accept the "options" Object as the 2nd argument
    options = protocols;
    protocols = null;
  }

  if ('string' === typeof protocols) {
    protocols = [ protocols ];
  }

  if (!Array.isArray(protocols)) {
    protocols = [];
  }

  this._socket = null;
  this._ultron = null;
  this._closeReceived = false;
  this.bytesReceived = 0;
  this.readyState = null;
  this.supports = {};
  this.extensions = {};

  if (Array.isArray(address)) {
    initAsServerClient.apply(this, address.concat(options));
  } else {
    initAsClient.apply(this, [address, protocols, options]);
  }
}

/**
 * Inherits from EventEmitter.
 */
util.inherits(WebSocket, EventEmitter);

/**
 * Ready States
 */
["CONNECTING", "OPEN", "CLOSING", "CLOSED"].forEach(function each(state, index) {
    WebSocket.prototype[state] = WebSocket[state] = index;
});

/**
 * Gracefully closes the connection, after sending a description message to the server
 *
 * @param {Object} data to be sent to the server
 * @api public
 */
WebSocket.prototype.close = function close(code, data) {
  if (this.readyState === WebSocket.CLOSED) return;

  if (this.readyState === WebSocket.CONNECTING) {
    this.readyState = WebSocket.CLOSED;
    return;
  }

  if (this.readyState === WebSocket.CLOSING) {
    if (this._closeReceived && this._isServer) {
      this.terminate();
    }
    return;
  }

  var self = this;
  try {
    this.readyState = WebSocket.CLOSING;
    this._closeCode = code;
    this._closeMessage = data;
    var mask = !this._isServer;
    this._sender.close(code, data, mask, function(err) {
      if (err) self.emit('error', err);

      if (self._closeReceived && self._isServer) {
        self.terminate();
      } else {
        // ensure that the connection is cleaned up even when no response of closing handshake.
        clearTimeout(self._closeTimer);
        self._closeTimer = setTimeout(cleanupWebsocketResources.bind(self, true), closeTimeout);
      }
    });
  } catch (e) {
    this.emit('error', e);
  }
};

/**
 * Pause the client stream
 *
 * @api public
 */
WebSocket.prototype.pause = function pauser() {
  if (this.readyState !== WebSocket.OPEN) throw new Error('not opened');

  return this._socket.pause();
};

/**
 * Sends a ping
 *
 * @param {Object} data to be sent to the server
 * @param {Object} Members - mask: boolean, binary: boolean
 * @param {boolean} dontFailWhenClosed indicates whether or not to throw if the connection isnt open
 * @api public
 */
WebSocket.prototype.ping = function ping(data, options, dontFailWhenClosed) {
  if (this.readyState !== WebSocket.OPEN) {
    if (dontFailWhenClosed === true) return;
    throw new Error('not opened');
  }

  options = options || {};

  if (typeof options.mask === 'undefined') options.mask = !this._isServer;

  this._sender.ping(data, options);
};

/**
 * Sends a pong
 *
 * @param {Object} data to be sent to the server
 * @param {Object} Members - mask: boolean, binary: boolean
 * @param {boolean} dontFailWhenClosed indicates whether or not to throw if the connection isnt open
 * @api public
 */
WebSocket.prototype.pong = function(data, options, dontFailWhenClosed) {
  if (this.readyState !== WebSocket.OPEN) {
    if (dontFailWhenClosed === true) return;
    throw new Error('not opened');
  }

  options = options || {};

  if (typeof options.mask === 'undefined') options.mask = !this._isServer;

  this._sender.pong(data, options);
};

/**
 * Resume the client stream
 *
 * @api public
 */
WebSocket.prototype.resume = function resume() {
  if (this.readyState !== WebSocket.OPEN) throw new Error('not opened');

  return this._socket.resume();
};

/**
 * Sends a piece of data
 *
 * @param {Object} data to be sent to the server
 * @param {Object} Members - mask: boolean, binary: boolean, compress: boolean
 * @param {function} Optional callback which is executed after the send completes
 * @api public
 */

WebSocket.prototype.send = function send(data, options, cb) {
  if (typeof options === 'function') {
    cb = options;
    options = {};
  }

  if (this.readyState !== WebSocket.OPEN) {
    if (typeof cb === 'function') cb(new Error('not opened'));
    else throw new Error('not opened');
    return;
  }

  if (!data) data = '';
  if (this._queue) {
    var self = this;
    this._queue.push(function() { self.send(data, options, cb); });
    return;
  }

  options = options || {};
  options.fin = true;

  if (typeof options.binary === 'undefined') {
    options.binary = (data instanceof ArrayBuffer || data instanceof Buffer ||
      data instanceof Uint8Array ||
      data instanceof Uint16Array ||
      data instanceof Uint32Array ||
      data instanceof Int8Array ||
      data instanceof Int16Array ||
      data instanceof Int32Array ||
      data instanceof Float32Array ||
      data instanceof Float64Array);
  }

  if (typeof options.mask === 'undefined') options.mask = !this._isServer;
  if (typeof options.compress === 'undefined') options.compress = true;
  if (!this.extensions[PerMessageDeflate.extensionName]) {
    options.compress = false;
  }

  var readable = typeof stream.Readable === 'function'
    ? stream.Readable
    : stream.Stream;

  if (data instanceof readable) {
    startQueue(this);
    var self = this;

    sendStream(this, data, options, function send(error) {
      process.nextTick(function tock() {
        executeQueueSends(self);
      });

      if (typeof cb === 'function') cb(error);
    });
  } else {
    this._sender.send(data, options, cb);
  }
};

/**
 * Streams data through calls to a user supplied function
 *
 * @param {Object} Members - mask: boolean, binary: boolean, compress: boolean
 * @param {function} 'function (error, send)' which is executed on successive ticks of which send is 'function (data, final)'.
 * @api public
 */
WebSocket.prototype.stream = function stream(options, cb) {
  if (typeof options === 'function') {
    cb = options;
    options = {};
  }

  var self = this;

  if (typeof cb !== 'function') throw new Error('callback must be provided');

  if (this.readyState !== WebSocket.OPEN) {
    if (typeof cb === 'function') cb(new Error('not opened'));
    else throw new Error('not opened');
    return;
  }

  if (this._queue) {
    this._queue.push(function () { self.stream(options, cb); });
    return;
  }

  options = options || {};

  if (typeof options.mask === 'undefined') options.mask = !this._isServer;
  if (typeof options.compress === 'undefined') options.compress = true;
  if (!this.extensions[PerMessageDeflate.extensionName]) {
    options.compress = false;
  }

  startQueue(this);

  function send(data, final) {
    try {
      if (self.readyState !== WebSocket.OPEN) throw new Error('not opened');
      options.fin = final === true;
      self._sender.send(data, options);
      if (!final) process.nextTick(cb.bind(null, null, send));
      else executeQueueSends(self);
    } catch (e) {
      if (typeof cb === 'function') cb(e);
      else {
        delete self._queue;
        self.emit('error', e);
      }
    }
  }

  process.nextTick(cb.bind(null, null, send));
};

/**
 * Immediately shuts down the connection
 *
 * @api public
 */
WebSocket.prototype.terminate = function terminate() {
  if (this.readyState === WebSocket.CLOSED) return;

  if (this._socket) {
    this.readyState = WebSocket.CLOSING;

    // End the connection
    try { this._socket.end(); }
    catch (e) {
      // Socket error during end() call, so just destroy it right now
      cleanupWebsocketResources.call(this, true);
      return;
    }

    // Add a timeout to ensure that the connection is completely
    // cleaned up within 30 seconds, even if the clean close procedure
    // fails for whatever reason
    // First cleanup any pre-existing timeout from an earlier "terminate" call,
    // if one exists.  Otherwise terminate calls in quick succession will leak timeouts
    // and hold the program open for `closeTimout` time.
    if (this._closeTimer) { clearTimeout(this._closeTimer); }
    this._closeTimer = setTimeout(cleanupWebsocketResources.bind(this, true), closeTimeout);
  } else if (this.readyState === WebSocket.CONNECTING) {
    cleanupWebsocketResources.call(this, true);
  }
};

/**
 * Expose bufferedAmount
 *
 * @api public
 */
Object.defineProperty(WebSocket.prototype, 'bufferedAmount', {
  get: function get() {
    var amount = 0;
    if (this._socket) {
      amount = this._socket.bufferSize || 0;
    }
    return amount;
  }
});

/**
 * Emulates the W3C Browser based WebSocket interface using function members.
 *
 * @see http://dev.w3.org/html5/websockets/#the-websocket-interface
 * @api public
 */
['open', 'error', 'close', 'message'].forEach(function(method) {
  Object.defineProperty(WebSocket.prototype, 'on' + method, {
    /**
     * Returns the current listener
     *
     * @returns {Mixed} the set function or undefined
     * @api public
     */
    get: function get() {
      var listener = this.listeners(method)[0];
      return listener ? (listener._listener ? listener._listener : listener) : undefined;
    },

    /**
     * Start listening for events
     *
     * @param {Function} listener the listener
     * @returns {Mixed} the set function or undefined
     * @api public
     */
    set: function set(listener) {
      this.removeAllListeners(method);
      this.addEventListener(method, listener);
    }
  });
});

/**
 * Emulates the W3C Browser based WebSocket interface using addEventListener.
 *
 * @see https://developer.mozilla.org/en/DOM/element.addEventListener
 * @see http://dev.w3.org/html5/websockets/#the-websocket-interface
 * @api public
 */
WebSocket.prototype.addEventListener = function(method, listener) {
  var target = this;

  function onMessage (data, flags) {
    listener.call(target, new MessageEvent(data, !!flags.binary, target));
  }

  function onClose (code, message) {
    listener.call(target, new CloseEvent(code, message, target));
  }

  function onError (event) {
    event.type = 'error';
    event.target = target;
    listener.call(target, event);
  }

  function onOpen () {
    listener.call(target, new OpenEvent(target));
  }

  if (typeof listener === 'function') {
    if (method === 'message') {
      // store a reference so we can return the original function from the
      // addEventListener hook
      onMessage._listener = listener;
      this.on(method, onMessage);
    } else if (method === 'close') {
      // store a reference so we can return the original function from the
      // addEventListener hook
      onClose._listener = listener;
      this.on(method, onClose);
    } else if (method === 'error') {
      // store a reference so we can return the original function from the
      // addEventListener hook
      onError._listener = listener;
      this.on(method, onError);
    } else if (method === 'open') {
      // store a reference so we can return the original function from the
      // addEventListener hook
      onOpen._listener = listener;
      this.on(method, onOpen);
    } else {
      this.on(method, listener);
    }
  }
};

module.exports = WebSocket;
module.exports.buildHostHeader = buildHostHeader

/**
 * W3C MessageEvent
 *
 * @see http://www.w3.org/TR/html5/comms.html
 * @constructor
 * @api private
 */
function MessageEvent(dataArg, isBinary, target) {
  this.type = 'message';
  this.data = dataArg;
  this.target = target;
  this.binary = isBinary; // non-standard.
}

/**
 * W3C CloseEvent
 *
 * @see http://www.w3.org/TR/html5/comms.html
 * @constructor
 * @api private
 */
function CloseEvent(code, reason, target) {
  this.type = 'close';
  this.wasClean = (typeof code === 'undefined' || code === 1000);
  this.code = code;
  this.reason = reason;
  this.target = target;
}

/**
 * W3C OpenEvent
 *
 * @see http://www.w3.org/TR/html5/comms.html
 * @constructor
 * @api private
 */
function OpenEvent(target) {
  this.type = 'open';
  this.target = target;
}

// Append port number to Host header, only if specified in the url
// and non-default
function buildHostHeader(isSecure, hostname, port) {
  var headerHost = hostname;
  if (hostname) {
    if ((isSecure && (port != 443)) || (!isSecure && (port != 80))){
      headerHost = headerHost + ':' + port;
    }
  }
  return headerHost;
}

/**
 * Entirely private apis,
 * which may or may not be bound to a sepcific WebSocket instance.
 */
function initAsServerClient(req, socket, upgradeHead, options) {
  options = new Options({
    protocolVersion: protocolVersion,
    protocol: null,
    extensions: {}
  }).merge(options);

  // expose state properties
  this.protocol = options.value.protocol;
  this.protocolVersion = options.value.protocolVersion;
  this.extensions = options.value.extensions;
  this.supports.binary = (this.protocolVersion !== 'hixie-76');
  this.upgradeReq = req;
  this.readyState = WebSocket.CONNECTING;
  this._isServer = true;

  // establish connection
  if (options.value.protocolVersion === 'hixie-76') {
    establishConnection.call(this, ReceiverHixie, SenderHixie, socket, upgradeHead);
  } else {
    establishConnection.call(this, Receiver, Sender, socket, upgradeHead);
  }
}

function initAsClient(address, protocols, options) {
  options = new Options({
    origin: null,
    protocolVersion: protocolVersion,
    host: null,
    headers: null,
    protocol: protocols.join(','),
    agent: null,

    // ssl-related options
    pfx: null,
    key: null,
    passphrase: null,
    cert: null,
    ca: null,
    ciphers: null,
    rejectUnauthorized: null,
    perMessageDeflate: true,
    localAddress: null
  }).merge(options);

  if (options.value.protocolVersion !== 8 && options.value.protocolVersion !== 13) {
    throw new Error('unsupported protocol version');
  }

  // verify URL and establish http class
  var serverUrl = url.parse(address);
  var isUnixSocket = serverUrl.protocol === 'ws+unix:';
  if (!serverUrl.host && !isUnixSocket) throw new Error('invalid url');
  var isSecure = serverUrl.protocol === 'wss:' || serverUrl.protocol === 'https:';
  var httpObj = isSecure ? https : http;
  var port = serverUrl.port || (isSecure ? 443 : 80);
  var auth = serverUrl.auth;

  // prepare extensions
  var extensionsOffer = {};
  var perMessageDeflate;
  if (options.value.perMessageDeflate) {
    perMessageDeflate = new PerMessageDeflate(typeof options.value.perMessageDeflate !== true ? options.value.perMessageDeflate : {}, false);
    extensionsOffer[PerMessageDeflate.extensionName] = perMessageDeflate.offer();
  }

  // expose state properties
  this._isServer = false;
  this.url = address;
  this.protocolVersion = options.value.protocolVersion;
  this.supports.binary = (this.protocolVersion !== 'hixie-76');

  // begin handshake
  var key = new Buffer(options.value.protocolVersion + '-' + Date.now()).toString('base64');
  var shasum = crypto.createHash('sha1');
  shasum.update(key + '258EAFA5-E914-47DA-95CA-C5AB0DC85B11');
  var expectedServerKey = shasum.digest('base64');

  var agent = options.value.agent;

  var headerHost = buildHostHeader(isSecure, serverUrl.hostname, port)

  var requestOptions = {
    port: port,
    host: serverUrl.hostname,
    headers: {
      'Connection': 'Upgrade',
      'Upgrade': 'websocket',
      'Host': headerHost,
      'Sec-WebSocket-Version': options.value.protocolVersion,
      'Sec-WebSocket-Key': key
    }
  };

  // If we have basic auth.
  if (auth) {
    requestOptions.headers.Authorization = 'Basic ' + new Buffer(auth).toString('base64');
  }

  if (options.value.protocol) {
    requestOptions.headers['Sec-WebSocket-Protocol'] = options.value.protocol;
  }

  if (options.value.host) {
    requestOptions.headers.Host = options.value.host;
  }

  if (options.value.headers) {
    for (var header in options.value.headers) {
       if (options.value.headers.hasOwnProperty(header)) {
        requestOptions.headers[header] = options.value.headers[header];
       }
    }
  }

  if (Object.keys(extensionsOffer).length) {
    requestOptions.headers['Sec-WebSocket-Extensions'] = Extensions.format(extensionsOffer);
  }

  if (options.isDefinedAndNonNull('pfx')
   || options.isDefinedAndNonNull('key')
   || options.isDefinedAndNonNull('passphrase')
   || options.isDefinedAndNonNull('cert')
   || options.isDefinedAndNonNull('ca')
   || options.isDefinedAndNonNull('ciphers')
   || options.isDefinedAndNonNull('rejectUnauthorized')) {

    if (options.isDefinedAndNonNull('pfx')) requestOptions.pfx = options.value.pfx;
    if (options.isDefinedAndNonNull('key')) requestOptions.key = options.value.key;
    if (options.isDefinedAndNonNull('passphrase')) requestOptions.passphrase = options.value.passphrase;
    if (options.isDefinedAndNonNull('cert')) requestOptions.cert = options.value.cert;
    if (options.isDefinedAndNonNull('ca')) requestOptions.ca = options.value.ca;
    if (options.isDefinedAndNonNull('ciphers')) requestOptions.ciphers = options.value.ciphers;
    if (options.isDefinedAndNonNull('rejectUnauthorized')) requestOptions.rejectUnauthorized = options.value.rejectUnauthorized;

    if (!agent) {
        // global agent ignores client side certificates
        agent = new httpObj.Agent(requestOptions);
    }
  }

  requestOptions.path = serverUrl.path || '/';

  if (agent) {
    requestOptions.agent = agent;
  }

  if (isUnixSocket) {
    requestOptions.socketPath = serverUrl.pathname;
  }

  if (options.value.localAddress) {
    requestOptions.localAddress = options.value.localAddress;
  }

  if (options.value.origin) {
    if (options.value.protocolVersion < 13) requestOptions.headers['Sec-WebSocket-Origin'] = options.value.origin;
    else requestOptions.headers.Origin = options.value.origin;
  }

  var self = this;
  var req = httpObj.request(requestOptions);

  req.on('error', function onerror(error) {
    self.emit('error', error);
    cleanupWebsocketResources.call(self, error);
  });

  req.once('response', function response(res) {
    var error;

    if (!self.emit('unexpected-response', req, res)) {
      error = new Error('unexpected server response (' + res.statusCode + ')');
      req.abort();
      self.emit('error', error);
    }

    cleanupWebsocketResources.call(self, error);
  });

  req.once('upgrade', function upgrade(res, socket, upgradeHead) {
    if (self.readyState === WebSocket.CLOSED) {
      // client closed before server accepted connection
      self.emit('close');
      self.removeAllListeners();
      socket.end();
      return;
    }

    var serverKey = res.headers['sec-websocket-accept'];
    if (typeof serverKey === 'undefined' || serverKey !== expectedServerKey) {
      self.emit('error', 'invalid server key');
      self.removeAllListeners();
      socket.end();
      return;
    }

    var serverProt = res.headers['sec-websocket-protocol'];
    var protList = (options.value.protocol || "").split(/, */);
    var protError = null;

    if (!options.value.protocol && serverProt) {
      protError = 'server sent a subprotocol even though none requested';
    } else if (options.value.protocol && !serverProt) {
      protError = 'server sent no subprotocol even though requested';
    } else if (serverProt && protList.indexOf(serverProt) === -1) {
      protError = 'server responded with an invalid protocol';
    }

    if (protError) {
      self.emit('error', protError);
      self.removeAllListeners();
      socket.end();
      return;
    } else if (serverProt) {
      self.protocol = serverProt;
    }

    var serverExtensions = Extensions.parse(res.headers['sec-websocket-extensions']);
    if (perMessageDeflate && serverExtensions[PerMessageDeflate.extensionName]) {
      try {
        perMessageDeflate.accept(serverExtensions[PerMessageDeflate.extensionName]);
      } catch (err) {
        self.emit('error', 'invalid extension parameter');
        self.removeAllListeners();
        socket.end();
        return;
      }
      self.extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
    }

    establishConnection.call(self, Receiver, Sender, socket, upgradeHead);

    // perform cleanup on http resources
    req.removeAllListeners();
    req = null;
    agent = null;
  });

  req.end();
  this.readyState = WebSocket.CONNECTING;
}

function establishConnection(ReceiverClass, SenderClass, socket, upgradeHead) {
  var ultron = this._ultron = new Ultron(socket)
    , called = false
    , self = this;

  socket.setTimeout(0);
  socket.setNoDelay(true);

  this._receiver = new ReceiverClass(this.extensions);
  this._socket = socket;

  // socket cleanup handlers
  ultron.on('end', cleanupWebsocketResources.bind(this));
  ultron.on('close', cleanupWebsocketResources.bind(this));
  ultron.on('error', cleanupWebsocketResources.bind(this));

  // ensure that the upgradeHead is added to the receiver
  function firstHandler(data) {
    if (called || self.readyState === WebSocket.CLOSED) return;

    called = true;
    socket.removeListener('data', firstHandler);
    ultron.on('data', realHandler);

    if (upgradeHead && upgradeHead.length > 0) {
      realHandler(upgradeHead);
      upgradeHead = null;
    }

    if (data) realHandler(data);
  }

  // subsequent packets are pushed straight to the receiver
  function realHandler(data) {
    self.bytesReceived += data.length;
    self._receiver.add(data);
  }

  ultron.on('data', firstHandler);

  // if data was passed along with the http upgrade,
  // this will schedule a push of that on to the receiver.
  // this has to be done on next tick, since the caller
  // hasn't had a chance to set event handlers on this client
  // object yet.
  process.nextTick(firstHandler);

  // receiver event handlers
  self._receiver.ontext = function ontext(data, flags) {
    flags = flags || {};

    self.emit('message', data, flags);
  };

  self._receiver.onbinary = function onbinary(data, flags) {
    flags = flags || {};

    flags.binary = true;
    self.emit('message', data, flags);
  };

  self._receiver.onping = function onping(data, flags) {
    flags = flags || {};

    self.pong(data, {
      mask: !self._isServer,
      binary: flags.binary === true
    }, true);

    self.emit('ping', data, flags);
  };

  self._receiver.onpong = function onpong(data, flags) {
    self.emit('pong', data, flags || {});
  };

  self._receiver.onclose = function onclose(code, data, flags) {
    flags = flags || {};

    self._closeReceived = true;
    self.close(code, data);
  };

  self._receiver.onerror = function onerror(reason, errorCode) {
    // close the connection when the receiver reports a HyBi error code
    self.close(typeof errorCode !== 'undefined' ? errorCode : 1002, '');
    self.emit('error', reason, errorCode);
  };

  // finalize the client
  this._sender = new SenderClass(socket, this.extensions);
  this._sender.on('error', function onerror(error) {
    self.close(1002, '');
    self.emit('error', error);
  });

  this.readyState = WebSocket.OPEN;
  this.emit('open');
}

function startQueue(instance) {
  instance._queue = instance._queue || [];
}

function executeQueueSends(instance) {
  var queue = instance._queue;
  if (typeof queue === 'undefined') return;

  delete instance._queue;
  for (var i = 0, l = queue.length; i < l; ++i) {
    queue[i]();
  }
}

function sendStream(instance, stream, options, cb) {
  stream.on('data', function incoming(data) {
    if (instance.readyState !== WebSocket.OPEN) {
      if (typeof cb === 'function') cb(new Error('not opened'));
      else {
        delete instance._queue;
        instance.emit('error', new Error('not opened'));
      }
      return;
    }

    options.fin = false;
    instance._sender.send(data, options);
  });

  stream.on('end', function end() {
    if (instance.readyState !== WebSocket.OPEN) {
      if (typeof cb === 'function') cb(new Error('not opened'));
      else {
        delete instance._queue;
        instance.emit('error', new Error('not opened'));
      }
      return;
    }

    options.fin = true;
    instance._sender.send(null, options);

    if (typeof cb === 'function') cb(null);
  });
}

function cleanupWebsocketResources(error) {
  if (this.readyState === WebSocket.CLOSED) return;

  var emitClose = this.readyState !== WebSocket.CONNECTING;
  this.readyState = WebSocket.CLOSED;

  clearTimeout(this._closeTimer);
  this._closeTimer = null;

  if (emitClose) {
    // If the connection was closed abnormally (with an error), or if 
    // the close control frame was not received then the close code
    // must default to 1006.
    if (error || !this._closeReceived) {
      this._closeCode = 1006;
    }
    this.emit('close', this._closeCode || 1000, this._closeMessage || '');
  }

  if (this._socket) {
    if (this._ultron) this._ultron.destroy();
    this._socket.on('error', function onerror() {
      try { this.destroy(); }
      catch (e) {}
    });

    try {
      if (!error) this._socket.end();
      else this._socket.destroy();
    } catch (e) { /* Ignore termination errors */ }

    this._socket = null;
    this._ultron = null;
  }

  if (this._sender) {
    this._sender.removeAllListeners();
    this._sender = null;
  }

  if (this._receiver) {
    this._receiver.cleanup();
    this._receiver = null;
  }

  if (this.extensions[PerMessageDeflate.extensionName]) {
    this.extensions[PerMessageDeflate.extensionName].cleanup();
  }

  this.extensions = null;

  this.removeAllListeners();
  this.on('error', function onerror() {}); // catch all errors after this
  delete this._queue;
}

}).call(this,_dereq_('_process'),_dereq_("buffer").Buffer)
},{"./Extensions":35,"./PerMessageDeflate":36,"./Receiver":38,"./Receiver.hixie":37,"./Sender":40,"./Sender.hixie":39,"_process":undefined,"buffer":undefined,"crypto":undefined,"events":undefined,"http":undefined,"https":undefined,"options":45,"stream":undefined,"ultron":46,"url":undefined,"util":undefined}],44:[function(_dereq_,module,exports){
(function (Buffer){
/*!
 * ws: a node.js websocket client
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var util = _dereq_('util')
  , events = _dereq_('events')
  , http = _dereq_('http')
  , crypto = _dereq_('crypto')
  , Options = _dereq_('options')
  , WebSocket = _dereq_('./WebSocket')
  , Extensions = _dereq_('./Extensions')
  , PerMessageDeflate = _dereq_('./PerMessageDeflate')
  , tls = _dereq_('tls')
  , url = _dereq_('url');

/**
 * WebSocket Server implementation
 */

function WebSocketServer(options, callback) {
  if (this instanceof WebSocketServer === false) {
    return new WebSocketServer(options, callback);
  }

  events.EventEmitter.call(this);

  options = new Options({
    host: '0.0.0.0',
    port: null,
    server: null,
    verifyClient: null,
    handleProtocols: null,
    path: null,
    noServer: false,
    disableHixie: false,
    clientTracking: true,
    perMessageDeflate: true
  }).merge(options);

  if (!options.isDefinedAndNonNull('port') && !options.isDefinedAndNonNull('server') && !options.value.noServer) {
    throw new TypeError('`port` or a `server` must be provided');
  }

  var self = this;

  if (options.isDefinedAndNonNull('port')) {
    this._server = http.createServer(function (req, res) {
      var body = http.STATUS_CODES[426];
      res.writeHead(426, {
        'Content-Length': body.length,
        'Content-Type': 'text/plain'
      });
      res.end(body);
    });
    this._server.allowHalfOpen = false;
    this._server.listen(options.value.port, options.value.host, callback);
    this._closeServer = function() { if (self._server) self._server.close(); };
  }
  else if (options.value.server) {
    this._server = options.value.server;
    if (options.value.path) {
      // take note of the path, to avoid collisions when multiple websocket servers are
      // listening on the same http server
      if (this._server._webSocketPaths && options.value.server._webSocketPaths[options.value.path]) {
        throw new Error('two instances of WebSocketServer cannot listen on the same http server path');
      }
      if (typeof this._server._webSocketPaths !== 'object') {
        this._server._webSocketPaths = {};
      }
      this._server._webSocketPaths[options.value.path] = 1;
    }
  }
  if (this._server) this._server.once('listening', function() { self.emit('listening'); });

  if (typeof this._server != 'undefined') {
    this._server.on('error', function(error) {
      self.emit('error', error)
    });
    this._server.on('upgrade', function(req, socket, upgradeHead) {
      //copy upgradeHead to avoid retention of large slab buffers used in node core
      var head = new Buffer(upgradeHead.length);
      upgradeHead.copy(head);

      self.handleUpgrade(req, socket, head, function(client) {
        self.emit('connection'+req.url, client);
        self.emit('connection', client);
      });
    });
  }

  this.options = options.value;
  this.path = options.value.path;
  this.clients = [];
}

/**
 * Inherits from EventEmitter.
 */

util.inherits(WebSocketServer, events.EventEmitter);

/**
 * Immediately shuts down the connection.
 *
 * @api public
 */

WebSocketServer.prototype.close = function(callback) {
  // terminate all associated clients
  var error = null;
  try {
    for (var i = 0, l = this.clients.length; i < l; ++i) {
      this.clients[i].terminate();
    }
  }
  catch (e) {
    error = e;
  }

  // remove path descriptor, if any
  if (this.path && this._server._webSocketPaths) {
    delete this._server._webSocketPaths[this.path];
    if (Object.keys(this._server._webSocketPaths).length == 0) {
      delete this._server._webSocketPaths;
    }
  }

  // close the http server if it was internally created
  try {
    if (typeof this._closeServer !== 'undefined') {
      this._closeServer();
    }
  }
  finally {
    delete this._server;
  }
  if(callback)
    callback(error);
  else if(error)
    throw error;
}

/**
 * Handle a HTTP Upgrade request.
 *
 * @api public
 */

WebSocketServer.prototype.handleUpgrade = function(req, socket, upgradeHead, cb) {
  // check for wrong path
  if (this.options.path) {
    var u = url.parse(req.url);
    if (u && u.pathname !== this.options.path) return;
  }

  if (typeof req.headers.upgrade === 'undefined' || req.headers.upgrade.toLowerCase() !== 'websocket') {
    abortConnection(socket, 400, 'Bad Request');
    return;
  }

  if (req.headers['sec-websocket-key1']) handleHixieUpgrade.apply(this, arguments);
  else handleHybiUpgrade.apply(this, arguments);
}

module.exports = WebSocketServer;

/**
 * Entirely private apis,
 * which may or may not be bound to a sepcific WebSocket instance.
 */

function handleHybiUpgrade(req, socket, upgradeHead, cb) {
  // handle premature socket errors
  var errorHandler = function() {
    try { socket.destroy(); } catch (e) {}
  }
  socket.on('error', errorHandler);

  // verify key presence
  if (!req.headers['sec-websocket-key']) {
    abortConnection(socket, 400, 'Bad Request');
    return;
  }

  // verify version
  var version = parseInt(req.headers['sec-websocket-version']);
  if ([8, 13].indexOf(version) === -1) {
    abortConnection(socket, 400, 'Bad Request');
    return;
  }

  // verify protocol
  var protocols = req.headers['sec-websocket-protocol'];

  // verify client
  var origin = version < 13 ?
    req.headers['sec-websocket-origin'] :
    req.headers['origin'];

  // handle extensions offer
  var extensionsOffer = Extensions.parse(req.headers['sec-websocket-extensions']);

  // handler to call when the connection sequence completes
  var self = this;
  var completeHybiUpgrade2 = function(protocol) {

    // calc key
    var key = req.headers['sec-websocket-key'];
    var shasum = crypto.createHash('sha1');
    shasum.update(key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11");
    key = shasum.digest('base64');

    var headers = [
        'HTTP/1.1 101 Switching Protocols'
      , 'Upgrade: websocket'
      , 'Connection: Upgrade'
      , 'Sec-WebSocket-Accept: ' + key
    ];

    if (typeof protocol != 'undefined') {
      headers.push('Sec-WebSocket-Protocol: ' + protocol);
    }

    var extensions = {};
    try {
      extensions = acceptExtensions.call(self, extensionsOffer);
    } catch (err) {
      abortConnection(socket, 400, 'Bad Request');
      return;
    }

    if (Object.keys(extensions).length) {
      var serverExtensions = {};
      Object.keys(extensions).forEach(function(token) {
        serverExtensions[token] = [extensions[token].params]
      });
      headers.push('Sec-WebSocket-Extensions: ' + Extensions.format(serverExtensions));
    }

    // allows external modification/inspection of handshake headers
    self.emit('headers', headers);

    socket.setTimeout(0);
    socket.setNoDelay(true);
    try {
      socket.write(headers.concat('', '').join('\r\n'));
    }
    catch (e) {
      // if the upgrade write fails, shut the connection down hard
      try { socket.destroy(); } catch (e) {}
      return;
    }

    var client = new WebSocket([req, socket, upgradeHead], {
      protocolVersion: version,
      protocol: protocol,
      extensions: extensions
    });

    if (self.options.clientTracking) {
      self.clients.push(client);
      client.on('close', function() {
        var index = self.clients.indexOf(client);
        if (index != -1) {
          self.clients.splice(index, 1);
        }
      });
    }

    // signal upgrade complete
    socket.removeListener('error', errorHandler);
    cb(client);
  }

  // optionally call external protocol selection handler before
  // calling completeHybiUpgrade2
  var completeHybiUpgrade1 = function() {
    // choose from the sub-protocols
    if (typeof self.options.handleProtocols == 'function') {
        var protList = (protocols || "").split(/, */);
        var callbackCalled = false;
        var res = self.options.handleProtocols(protList, function(result, protocol) {
          callbackCalled = true;
          if (!result) abortConnection(socket, 401, 'Unauthorized');
          else completeHybiUpgrade2(protocol);
        });
        if (!callbackCalled) {
            // the handleProtocols handler never called our callback
            abortConnection(socket, 501, 'Could not process protocols');
        }
        return;
    } else {
        if (typeof protocols !== 'undefined') {
            completeHybiUpgrade2(protocols.split(/, */)[0]);
        }
        else {
            completeHybiUpgrade2();
        }
    }
  }

  // optionally call external client verification handler
  if (typeof this.options.verifyClient == 'function') {
    var info = {
      origin: origin,
      secure: typeof req.connection.authorized !== 'undefined' || typeof req.connection.encrypted !== 'undefined',
      req: req
    };
    if (this.options.verifyClient.length == 2) {
      this.options.verifyClient(info, function(result, code, name) {
        if (typeof code === 'undefined') code = 401;
        if (typeof name === 'undefined') name = http.STATUS_CODES[code];

        if (!result) abortConnection(socket, code, name);
        else completeHybiUpgrade1();
      });
      return;
    }
    else if (!this.options.verifyClient(info)) {
      abortConnection(socket, 401, 'Unauthorized');
      return;
    }
  }

  completeHybiUpgrade1();
}

function handleHixieUpgrade(req, socket, upgradeHead, cb) {
  // handle premature socket errors
  var errorHandler = function() {
    try { socket.destroy(); } catch (e) {}
  }
  socket.on('error', errorHandler);

  // bail if options prevent hixie
  if (this.options.disableHixie) {
    abortConnection(socket, 401, 'Hixie support disabled');
    return;
  }

  // verify key presence
  if (!req.headers['sec-websocket-key2']) {
    abortConnection(socket, 400, 'Bad Request');
    return;
  }

  var origin = req.headers['origin']
    , self = this;

  // setup handshake completion to run after client has been verified
  var onClientVerified = function() {
    var wshost;
    if (!req.headers['x-forwarded-host'])
        wshost = req.headers.host;
    else
        wshost = req.headers['x-forwarded-host'];
    var location = ((req.headers['x-forwarded-proto'] === 'https' || socket.encrypted) ? 'wss' : 'ws') + '://' + wshost + req.url
      , protocol = req.headers['sec-websocket-protocol'];

    // handshake completion code to run once nonce has been successfully retrieved
    var completeHandshake = function(nonce, rest) {
      // calculate key
      var k1 = req.headers['sec-websocket-key1']
        , k2 = req.headers['sec-websocket-key2']
        , md5 = crypto.createHash('md5');

      [k1, k2].forEach(function (k) {
        var n = parseInt(k.replace(/[^\d]/g, ''))
          , spaces = k.replace(/[^ ]/g, '').length;
        if (spaces === 0 || n % spaces !== 0){
          abortConnection(socket, 400, 'Bad Request');
          return;
        }
        n /= spaces;
        md5.update(String.fromCharCode(
          n >> 24 & 0xFF,
          n >> 16 & 0xFF,
          n >> 8  & 0xFF,
          n       & 0xFF));
      });
      md5.update(nonce.toString('binary'));

      var headers = [
          'HTTP/1.1 101 Switching Protocols'
        , 'Upgrade: WebSocket'
        , 'Connection: Upgrade'
        , 'Sec-WebSocket-Location: ' + location
      ];
      if (typeof protocol != 'undefined') headers.push('Sec-WebSocket-Protocol: ' + protocol);
      if (typeof origin != 'undefined') headers.push('Sec-WebSocket-Origin: ' + origin);

      socket.setTimeout(0);
      socket.setNoDelay(true);
      try {
        // merge header and hash buffer
        var headerBuffer = new Buffer(headers.concat('', '').join('\r\n'));
        var hashBuffer = new Buffer(md5.digest('binary'), 'binary');
        var handshakeBuffer = new Buffer(headerBuffer.length + hashBuffer.length);
        headerBuffer.copy(handshakeBuffer, 0);
        hashBuffer.copy(handshakeBuffer, headerBuffer.length);

        // do a single write, which - upon success - causes a new client websocket to be setup
        socket.write(handshakeBuffer, 'binary', function(err) {
          if (err) return; // do not create client if an error happens
          var client = new WebSocket([req, socket, rest], {
            protocolVersion: 'hixie-76',
            protocol: protocol
          });
          if (self.options.clientTracking) {
            self.clients.push(client);
            client.on('close', function() {
              var index = self.clients.indexOf(client);
              if (index != -1) {
                self.clients.splice(index, 1);
              }
            });
          }

          // signal upgrade complete
          socket.removeListener('error', errorHandler);
          cb(client);
        });
      }
      catch (e) {
        try { socket.destroy(); } catch (e) {}
        return;
      }
    }

    // retrieve nonce
    var nonceLength = 8;
    if (upgradeHead && upgradeHead.length >= nonceLength) {
      var nonce = upgradeHead.slice(0, nonceLength);
      var rest = upgradeHead.length > nonceLength ? upgradeHead.slice(nonceLength) : null;
      completeHandshake.call(self, nonce, rest);
    }
    else {
      // nonce not present in upgradeHead, so we must wait for enough data
      // data to arrive before continuing
      var nonce = new Buffer(nonceLength);
      upgradeHead.copy(nonce, 0);
      var received = upgradeHead.length;
      var rest = null;
      var handler = function (data) {
        var toRead = Math.min(data.length, nonceLength - received);
        if (toRead === 0) return;
        data.copy(nonce, received, 0, toRead);
        received += toRead;
        if (received == nonceLength) {
          socket.removeListener('data', handler);
          if (toRead < data.length) rest = data.slice(toRead);
          completeHandshake.call(self, nonce, rest);
        }
      }
      socket.on('data', handler);
    }
  }

  // verify client
  if (typeof this.options.verifyClient == 'function') {
    var info = {
      origin: origin,
      secure: typeof req.connection.authorized !== 'undefined' || typeof req.connection.encrypted !== 'undefined',
      req: req
    };
    if (this.options.verifyClient.length == 2) {
      var self = this;
      this.options.verifyClient(info, function(result, code, name) {
        if (typeof code === 'undefined') code = 401;
        if (typeof name === 'undefined') name = http.STATUS_CODES[code];

        if (!result) abortConnection(socket, code, name);
        else onClientVerified.apply(self);
      });
      return;
    }
    else if (!this.options.verifyClient(info)) {
      abortConnection(socket, 401, 'Unauthorized');
      return;
    }
  }

  // no client verification required
  onClientVerified();
}

function acceptExtensions(offer) {
  var extensions = {};
  var options = this.options.perMessageDeflate;
  if (options && offer[PerMessageDeflate.extensionName]) {
    var perMessageDeflate = new PerMessageDeflate(options !== true ? options : {}, true);
    perMessageDeflate.accept(offer[PerMessageDeflate.extensionName]);
    extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
  }
  return extensions;
}

function abortConnection(socket, code, name) {
  try {
    var response = [
      'HTTP/1.1 ' + code + ' ' + name,
      'Content-type: text/html'
    ];
    socket.write(response.concat('', '').join('\r\n'));
  }
  catch (e) { /* ignore errors - we've aborted this connection */ }
  finally {
    // ensure that an early aborted connection is shut down completely
    try { socket.destroy(); } catch (e) {}
  }
}

}).call(this,_dereq_("buffer").Buffer)
},{"./Extensions":35,"./PerMessageDeflate":36,"./WebSocket":43,"buffer":undefined,"crypto":undefined,"events":undefined,"http":undefined,"options":45,"tls":undefined,"url":undefined,"util":undefined}],45:[function(_dereq_,module,exports){
/*!
 * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
 * MIT Licensed
 */

var fs = _dereq_('fs');

function Options(defaults) {
  var internalValues = {};
  var values = this.value = {};
  Object.keys(defaults).forEach(function(key) {
    internalValues[key] = defaults[key];
    Object.defineProperty(values, key, {
      get: function() { return internalValues[key]; },
      configurable: false,
      enumerable: true
    });
  });
  this.reset = function() {
    Object.keys(defaults).forEach(function(key) {
      internalValues[key] = defaults[key];
    });
    return this;
  };
  this.merge = function(options, required) {
    options = options || {};
    if (Object.prototype.toString.call(required) === '[object Array]') {
      var missing = [];
      for (var i = 0, l = required.length; i < l; ++i) {
        var key = required[i];
        if (!(key in options)) {
          missing.push(key);
        }
      }
      if (missing.length > 0) {
        if (missing.length > 1) {
          throw new Error('options ' +
            missing.slice(0, missing.length - 1).join(', ') + ' and ' +
            missing[missing.length - 1] + ' must be defined');
        }
        else throw new Error('option ' + missing[0] + ' must be defined');
      }
    }
    Object.keys(options).forEach(function(key) {
      if (key in internalValues) {
        internalValues[key] = options[key];
      }
    });
    return this;
  };
  this.copy = function(keys) {
    var obj = {};
    Object.keys(defaults).forEach(function(key) {
      if (keys.indexOf(key) !== -1) {
        obj[key] = values[key];
      }
    });
    return obj;
  };
  this.read = function(filename, cb) {
    if (typeof cb == 'function') {
      var self = this;
      fs.readFile(filename, function(error, data) {
        if (error) return cb(error);
        var conf = JSON.parse(data);
        self.merge(conf);
        cb();
      });
    }
    else {
      var conf = JSON.parse(fs.readFileSync(filename));
      this.merge(conf);
    }
    return this;
  };
  this.isDefined = function(key) {
    return typeof values[key] != 'undefined';
  };
  this.isDefinedAndNonNull = function(key) {
    return typeof values[key] != 'undefined' && values[key] !== null;
  };
  Object.freeze(values);
  Object.freeze(this);
}

module.exports = Options;

},{"fs":undefined}],46:[function(_dereq_,module,exports){
'use strict';

var has = Object.prototype.hasOwnProperty;

/**
 * An auto incrementing id which we can use to create "unique" Ultron instances
 * so we can track the event emitters that are added through the Ultron
 * interface.
 *
 * @type {Number}
 * @private
 */
var id = 0;

/**
 * Ultron is high-intelligence robot. It gathers intelligence so it can start improving
 * upon his rudimentary design. It will learn from your EventEmitting patterns
 * and exterminate them.
 *
 * @constructor
 * @param {EventEmitter} ee EventEmitter instance we need to wrap.
 * @api public
 */
function Ultron(ee) {
  if (!(this instanceof Ultron)) return new Ultron(ee);

  this.id = id++;
  this.ee = ee;
}

/**
 * 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.
 * @returns {Ultron}
 * @api public
 */
Ultron.prototype.on = function on(event, fn, context) {
  fn.__ultron = this.id;
  this.ee.on(event, fn, context);

  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.
 * @returns {Ultron}
 * @api public
 */
Ultron.prototype.once = function once(event, fn, context) {
  fn.__ultron = this.id;
  this.ee.once(event, fn, context);

  return this;
};

/**
 * Remove the listeners we assigned for the given event.
 *
 * @returns {Ultron}
 * @api public
 */
Ultron.prototype.remove = function remove() {
  var args = arguments
    , event;

  //
  // When no event names are provided we assume that we need to clear all the
  // events that were assigned through us.
  //
  if (args.length === 1 && 'string' === typeof args[0]) {
    args = args[0].split(/[, ]+/);
  } else if (!args.length) {
    args = [];

    for (event in this.ee._events) {
      if (has.call(this.ee._events, event)) args.push(event);
    }
  }

  for (var i = 0; i < args.length; i++) {
    var listeners = this.ee.listeners(args[i]);

    for (var j = 0; j < listeners.length; j++) {
      event = listeners[j];

      //
      // Once listeners have a `listener` property that stores the real listener
      // in the EventEmitter that ships with Node.js.
      //
      if (event.listener) {
        if (event.listener.__ultron !== this.id) continue;
        delete event.listener.__ultron;
      } else {
        if (event.__ultron !== this.id) continue;
        delete event.__ultron;
      }

      this.ee.removeListener(args[i], event);
    }
  }

  return this;
};

/**
 * Destroy the Ultron instance, remove all listeners and release all references.
 *
 * @returns {Boolean}
 * @api public
 */
Ultron.prototype.destroy = function destroy() {
  if (!this.ee) return false;

  this.remove();
  this.ee = null;

  return true;
};

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

},{}],47:[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;

},{}]},{},[1])(1)
});