Diffusion SHRINE MedCo Fork (tokyber) Browse

shrine-medco/shrine-webclient/src/main/html/node_modules/engine.io-client/engine.io.js
c27d08be9edftokyber

engine.io.js
View Options

			!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":20}],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 ? true : 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 : typeof global !== "undefined" ? global : {})
			},{"./transport":4,"./transports":5,"component-emitter":16,"debug":18,"engine.io-parser":20,"indexof":24,"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":16,"engine.io-parser":20}],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 : typeof global !== "undefined" ? global : {})
			},{"./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];
			if (insertAt) {
			insertAt.parentNode.insertBefore(script, insertAt);
			}
			else {
			(document.head \|\| document.body).appendChild(script);
			}
			this.script = script;

			var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);

			if (isUAgecko) {
			setTimeout(function () {
			var iframe = document.createElement('iframe');
			document.body.appendChild(iframe);
			document.body.removeChild(iframe);
			}, 100);
			}
			};

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

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

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

			form.className = 'socketio';
			form.style.position = 'absolute';
			form.style.top = '-1000px';
			form.style.left = '-1000px';
			form.target = id;
			form.method = 'POST';
			form.setAttribute('accept-charset', 'utf-8');
			area.name = 'd';
			form.appendChild(area);
			document.body.appendChild(form);

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

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

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

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

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

			iframe.id = self.iframeId;

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

			initIframe();

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

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

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

			}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
			},{"./polling":8,"component-inherit":17}],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 : typeof global !== "undefined" ? global : {})
			},{"./polling":8,"component-emitter":16,"component-inherit":17,"debug":18,"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":17,"debug":18,"engine.io-parser":20,"parseqs":28,"xmlhttprequest-ssl":10,"yeast":31}],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');
			var BrowserWebSocket = global.WebSocket \|\| global.MozWebSocket;

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

			var WebSocket = BrowserWebSocket;
			if (!WebSocket && typeof window === 'undefined') {
			try {
			WebSocket = _dereq_('ws');
			} catch (e) { }
			}

			/**
			* Module exports.
			*/

			module.exports = WS;

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

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

			/**
			* Inherits from Transport.
			*/

			inherit(WS, Transport);

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

			WS.prototype.name = 'websocket';

			/*
			* WebSockets support binary
			*/

			WS.prototype.supportsBinary = true;

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

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

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

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

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

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

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

			this.addEventListeners();
			};

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

			query = parseqs.encode(query);

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

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

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

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

			}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : typeof global !== "undefined" ? global : {})
			},{"../transport":4,"component-inherit":17,"debug":18,"engine.io-parser":20,"parseqs":28,"ws":15,"yeast":31}],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":23}],11:[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() {}

			},{}],12:[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;
			};

			},{}],13:[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+/");

			},{}],14:[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 : typeof global !== "undefined" ? global : {})
			},{}],15:[function(_dereq_,module,exports){

			},{}],16:[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;
			};

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

			module.exports = function(a, b){
			var fn = function(){};
			fn.prototype = b.prototype;
			a.prototype = new fn;
			a.prototype.constructor = a;
			};
			},{}],18:[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":19}],19:[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":26}],20:[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 : typeof global !== "undefined" ? global : {})
			},{"./keys":21,"after":11,"arraybuffer.slice":12,"base64-arraybuffer":13,"blob":14,"has-binary":22,"utf8":30}],21:[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;
			};

			},{}],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 : typeof global !== "undefined" ? global : {})
			},{"isarray":25}],23:[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;
			}

			},{}],24:[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;
			};
			},{}],25:[function(_dereq_,module,exports){
			module.exports = Array.isArray \|\| function (arr) {
			return Object.prototype.toString.call(arr) == '[object Array]';
			};

			},{}],26:[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';
			}

			},{}],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 : typeof global !== "undefined" ? global : {})
			},{}],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){
			(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 : typeof global !== "undefined" ? global : {})
			},{}],31:[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)
			});