diff --git a/index.html b/index.html
index 0675970..c916989 100644
--- a/index.html
+++ b/index.html
@@ -750,7 +750,7 @@
{ src: 'plugin/zoom-js/zoom.js', async: true },
{ src: 'plugin/notes/notes.js', async: true },
- { src: 'https://cdn.socket.io/socket.io-2.0.3.js', async: true },
+ { src: 'lib/js/socket.io.js', async: true },
{
src: Reveal.getQueryHash().s ?
'plugin/multiplex/master.js' :
diff --git a/lib/js/socket.io.dev.js b/lib/js/socket.io.dev.js
new file mode 100644
index 0000000..d146d60
--- /dev/null
+++ b/lib/js/socket.io.dev.js
@@ -0,0 +1,6620 @@
+/*!
+ * Socket.IO v2.2.0
+ * (c) 2014-2018 Guillermo Rauch
+ * Released under the MIT License.
+ */
+(function webpackUniversalModuleDefinition(root, factory) {
+ if(typeof exports === 'object' && typeof module === 'object')
+ module.exports = factory();
+ else if(typeof define === 'function' && define.amd)
+ define([], factory);
+ else if(typeof exports === 'object')
+ exports["io"] = factory();
+ else
+ root["io"] = factory();
+})(this, function() {
+return /******/ (function(modules) { // webpackBootstrap
+/******/ // The module cache
+/******/ var installedModules = {};
+/******/
+/******/ // The require function
+/******/ function __webpack_require__(moduleId) {
+/******/
+/******/ // Check if module is in cache
+/******/ if(installedModules[moduleId])
+/******/ return installedModules[moduleId].exports;
+/******/
+/******/ // Create a new module (and put it into the cache)
+/******/ var module = installedModules[moduleId] = {
+/******/ exports: {},
+/******/ id: moduleId,
+/******/ loaded: false
+/******/ };
+/******/
+/******/ // Execute the module function
+/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+/******/
+/******/ // Flag the module as loaded
+/******/ module.loaded = true;
+/******/
+/******/ // Return the exports of the module
+/******/ return module.exports;
+/******/ }
+/******/
+/******/
+/******/ // expose the modules object (__webpack_modules__)
+/******/ __webpack_require__.m = modules;
+/******/
+/******/ // expose the module cache
+/******/ __webpack_require__.c = installedModules;
+/******/
+/******/ // __webpack_public_path__
+/******/ __webpack_require__.p = "";
+/******/
+/******/ // Load entry module and return exports
+/******/ return __webpack_require__(0);
+/******/ })
+/************************************************************************/
+/******/ ([
+/* 0 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+ /**
+ * Module dependencies.
+ */
+
+ var url = __webpack_require__(1);
+ var parser = __webpack_require__(7);
+ var Manager = __webpack_require__(12);
+ var debug = __webpack_require__(3)('socket.io-client');
+
+ /**
+ * Module exports.
+ */
+
+ module.exports = exports = lookup;
+
+ /**
+ * Managers cache.
+ */
+
+ var cache = exports.managers = {};
+
+ /**
+ * Looks up an existing `Manager` for multiplexing.
+ * If the user summons:
+ *
+ * `io('http://localhost/a');`
+ * `io('http://localhost/b');`
+ *
+ * We reuse the existing instance based on same scheme/port/host,
+ * and we initialize sockets for each namespace.
+ *
+ * @api public
+ */
+
+ function lookup(uri, opts) {
+ if ((typeof uri === 'undefined' ? 'undefined' : _typeof(uri)) === 'object') {
+ opts = uri;
+ uri = undefined;
+ }
+
+ opts = opts || {};
+
+ var parsed = url(uri);
+ var source = parsed.source;
+ var id = parsed.id;
+ var path = parsed.path;
+ var sameNamespace = cache[id] && path in cache[id].nsps;
+ var newConnection = opts.forceNew || opts['force new connection'] || false === opts.multiplex || sameNamespace;
+
+ var io;
+
+ if (newConnection) {
+ debug('ignoring socket cache for %s', source);
+ io = Manager(source, opts);
+ } else {
+ if (!cache[id]) {
+ debug('new io instance for %s', source);
+ cache[id] = Manager(source, opts);
+ }
+ io = cache[id];
+ }
+ if (parsed.query && !opts.query) {
+ opts.query = parsed.query;
+ }
+ return io.socket(parsed.path, opts);
+ }
+
+ /**
+ * Protocol version.
+ *
+ * @api public
+ */
+
+ exports.protocol = parser.protocol;
+
+ /**
+ * `connect`.
+ *
+ * @param {String} uri
+ * @api public
+ */
+
+ exports.connect = lookup;
+
+ /**
+ * Expose constructors for standalone build.
+ *
+ * @api public
+ */
+
+ exports.Manager = __webpack_require__(12);
+ exports.Socket = __webpack_require__(36);
+
+/***/ }),
+/* 1 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ /**
+ * Module dependencies.
+ */
+
+ var parseuri = __webpack_require__(2);
+ var debug = __webpack_require__(3)('socket.io-client:url');
+
+ /**
+ * Module exports.
+ */
+
+ module.exports = url;
+
+ /**
+ * URL parser.
+ *
+ * @param {String} url
+ * @param {Object} An object meant to mimic window.location.
+ * Defaults to window.location.
+ * @api public
+ */
+
+ function url(uri, loc) {
+ var obj = uri;
+
+ // default to window.location
+ loc = loc || typeof location !== 'undefined' && location;
+ if (null == uri) uri = loc.protocol + '//' + loc.host;
+
+ // relative path support
+ if ('string' === typeof uri) {
+ if ('/' === uri.charAt(0)) {
+ if ('/' === uri.charAt(1)) {
+ uri = loc.protocol + uri;
+ } else {
+ uri = loc.host + uri;
+ }
+ }
+
+ if (!/^(https?|wss?):\/\//.test(uri)) {
+ debug('protocol-less url %s', uri);
+ if ('undefined' !== typeof loc) {
+ uri = loc.protocol + '//' + uri;
+ } else {
+ uri = 'https://' + uri;
+ }
+ }
+
+ // parse
+ debug('parse %s', uri);
+ obj = parseuri(uri);
+ }
+
+ // make sure we treat `localhost:80` and `localhost` equally
+ if (!obj.port) {
+ if (/^(http|ws)$/.test(obj.protocol)) {
+ obj.port = '80';
+ } else if (/^(http|ws)s$/.test(obj.protocol)) {
+ obj.port = '443';
+ }
+ }
+
+ obj.path = obj.path || '/';
+
+ var ipv6 = obj.host.indexOf(':') !== -1;
+ var host = ipv6 ? '[' + obj.host + ']' : obj.host;
+
+ // define unique id
+ obj.id = obj.protocol + '://' + host + ':' + obj.port;
+ // define href
+ obj.href = obj.protocol + '://' + host + (loc && loc.port === obj.port ? '' : ':' + obj.port);
+
+ return obj;
+ }
+
+/***/ }),
+/* 2 */
+/***/ (function(module, exports) {
+
+ /**
+ * Parses an URI
+ *
+ * @author Steven Levithan (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;
+ };
+
+
+/***/ }),
+/* 3 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /* WEBPACK VAR INJECTION */(function(process) {/**
+ * This is the web browser implementation of `debug()`.
+ *
+ * Expose `debug()` as the module.
+ */
+
+ exports = module.exports = __webpack_require__(5);
+ 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 = [
+ '#0000CC', '#0000FF', '#0033CC', '#0033FF', '#0066CC', '#0066FF', '#0099CC',
+ '#0099FF', '#00CC00', '#00CC33', '#00CC66', '#00CC99', '#00CCCC', '#00CCFF',
+ '#3300CC', '#3300FF', '#3333CC', '#3333FF', '#3366CC', '#3366FF', '#3399CC',
+ '#3399FF', '#33CC00', '#33CC33', '#33CC66', '#33CC99', '#33CCCC', '#33CCFF',
+ '#6600CC', '#6600FF', '#6633CC', '#6633FF', '#66CC00', '#66CC33', '#9900CC',
+ '#9900FF', '#9933CC', '#9933FF', '#99CC00', '#99CC33', '#CC0000', '#CC0033',
+ '#CC0066', '#CC0099', '#CC00CC', '#CC00FF', '#CC3300', '#CC3333', '#CC3366',
+ '#CC3399', '#CC33CC', '#CC33FF', '#CC6600', '#CC6633', '#CC9900', '#CC9933',
+ '#CCCC00', '#CCCC33', '#FF0000', '#FF0033', '#FF0066', '#FF0099', '#FF00CC',
+ '#FF00FF', '#FF3300', '#FF3333', '#FF3366', '#FF3399', '#FF33CC', '#FF33FF',
+ '#FF6600', '#FF6633', '#FF9900', '#FF9933', '#FFCC00', '#FFCC33'
+ ];
+
+ /**
+ * 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() {
+ // NB: In an Electron preload script, document will be defined but not fully
+ // initialized. Since we know we're in Chrome, we'll just detect this case
+ // explicitly
+ if (typeof window !== 'undefined' && window.process && window.process.type === 'renderer') {
+ return true;
+ }
+
+ // Internet Explorer and Edge do not support colors.
+ if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
+ return false;
+ }
+
+ // is webkit? http://stackoverflow.com/a/16459606/376773
+ // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
+ return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
+ // is firebug? http://stackoverflow.com/a/398120/376773
+ (typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
+ // is firefox >= v31?
+ // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
+ (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
+ // double check webkit in userAgent just in case we are in a worker
+ (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
+ }
+
+ /**
+ * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
+ */
+
+ exports.formatters.j = function(v) {
+ try {
+ return JSON.stringify(v);
+ } catch (err) {
+ return '[UnexpectedJSONParseError]: ' + err.message;
+ }
+ };
+
+
+ /**
+ * Colorize log arguments if enabled.
+ *
+ * @api public
+ */
+
+ function formatArgs(args) {
+ var useColors = this.useColors;
+
+ args[0] = (useColors ? '%c' : '')
+ + this.namespace
+ + (useColors ? ' %c' : ' ')
+ + args[0]
+ + (useColors ? '%c ' : ' ')
+ + '+' + exports.humanize(this.diff);
+
+ if (!useColors) return;
+
+ var c = 'color: ' + this.color;
+ args.splice(1, 0, c, 'color: inherit')
+
+ // 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-zA-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);
+ }
+
+ /**
+ * 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) {}
+
+ // If debug isn't set in LS, and we're in Electron, try to load $DEBUG
+ if (!r && typeof process !== 'undefined' && 'env' in process) {
+ r = process.env.DEBUG;
+ }
+
+ 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) {}
+ }
+
+ /* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(4)))
+
+/***/ }),
+/* 4 */
+/***/ (function(module, exports) {
+
+ // shim for using process in browser
+ var process = module.exports = {};
+
+ // cached from whatever global is present so that test runners that stub it
+ // don't break things. But we need to wrap it in a try catch in case it is
+ // wrapped in strict mode code which doesn't define any globals. It's inside a
+ // function because try/catches deoptimize in certain engines.
+
+ var cachedSetTimeout;
+ var cachedClearTimeout;
+
+ function defaultSetTimout() {
+ throw new Error('setTimeout has not been defined');
+ }
+ function defaultClearTimeout () {
+ throw new Error('clearTimeout has not been defined');
+ }
+ (function () {
+ try {
+ if (typeof setTimeout === 'function') {
+ cachedSetTimeout = setTimeout;
+ } else {
+ cachedSetTimeout = defaultSetTimout;
+ }
+ } catch (e) {
+ cachedSetTimeout = defaultSetTimout;
+ }
+ try {
+ if (typeof clearTimeout === 'function') {
+ cachedClearTimeout = clearTimeout;
+ } else {
+ cachedClearTimeout = defaultClearTimeout;
+ }
+ } catch (e) {
+ cachedClearTimeout = defaultClearTimeout;
+ }
+ } ())
+ function runTimeout(fun) {
+ if (cachedSetTimeout === setTimeout) {
+ //normal enviroments in sane situations
+ return setTimeout(fun, 0);
+ }
+ // if setTimeout wasn't available but was latter defined
+ if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
+ cachedSetTimeout = setTimeout;
+ return setTimeout(fun, 0);
+ }
+ try {
+ // when when somebody has screwed with setTimeout but no I.E. maddness
+ return cachedSetTimeout(fun, 0);
+ } catch(e){
+ try {
+ // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
+ return cachedSetTimeout.call(null, fun, 0);
+ } catch(e){
+ // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
+ return cachedSetTimeout.call(this, fun, 0);
+ }
+ }
+
+
+ }
+ function runClearTimeout(marker) {
+ if (cachedClearTimeout === clearTimeout) {
+ //normal enviroments in sane situations
+ return clearTimeout(marker);
+ }
+ // if clearTimeout wasn't available but was latter defined
+ if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
+ cachedClearTimeout = clearTimeout;
+ return clearTimeout(marker);
+ }
+ try {
+ // when when somebody has screwed with setTimeout but no I.E. maddness
+ return cachedClearTimeout(marker);
+ } catch (e){
+ try {
+ // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
+ return cachedClearTimeout.call(null, marker);
+ } catch (e){
+ // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
+ // Some versions of I.E. have different rules for clearTimeout vs setTimeout
+ return cachedClearTimeout.call(this, marker);
+ }
+ }
+
+
+
+ }
+ var queue = [];
+ var draining = false;
+ var currentQueue;
+ var queueIndex = -1;
+
+ function cleanUpNextTick() {
+ if (!draining || !currentQueue) {
+ return;
+ }
+ draining = false;
+ if (currentQueue.length) {
+ queue = currentQueue.concat(queue);
+ } else {
+ queueIndex = -1;
+ }
+ if (queue.length) {
+ drainQueue();
+ }
+ }
+
+ function drainQueue() {
+ if (draining) {
+ return;
+ }
+ var timeout = runTimeout(cleanUpNextTick);
+ draining = true;
+
+ var len = queue.length;
+ while(len) {
+ currentQueue = queue;
+ queue = [];
+ while (++queueIndex < len) {
+ if (currentQueue) {
+ currentQueue[queueIndex].run();
+ }
+ }
+ queueIndex = -1;
+ len = queue.length;
+ }
+ currentQueue = null;
+ draining = false;
+ runClearTimeout(timeout);
+ }
+
+ process.nextTick = function (fun) {
+ var args = new Array(arguments.length - 1);
+ if (arguments.length > 1) {
+ for (var i = 1; i < arguments.length; i++) {
+ args[i - 1] = arguments[i];
+ }
+ }
+ queue.push(new Item(fun, args));
+ if (queue.length === 1 && !draining) {
+ runTimeout(drainQueue);
+ }
+ };
+
+ // v8 likes predictible objects
+ function Item(fun, array) {
+ this.fun = fun;
+ this.array = array;
+ }
+ Item.prototype.run = function () {
+ this.fun.apply(null, this.array);
+ };
+ process.title = 'browser';
+ process.browser = true;
+ process.env = {};
+ process.argv = [];
+ process.version = ''; // empty string to avoid regexp issues
+ process.versions = {};
+
+ function noop() {}
+
+ process.on = noop;
+ process.addListener = noop;
+ process.once = noop;
+ process.off = noop;
+ process.removeListener = noop;
+ process.removeAllListeners = noop;
+ process.emit = noop;
+ process.prependListener = noop;
+ process.prependOnceListener = noop;
+
+ process.listeners = function (name) { return [] }
+
+ process.binding = function (name) {
+ throw new Error('process.binding is not supported');
+ };
+
+ process.cwd = function () { return '/' };
+ process.chdir = function (dir) {
+ throw new Error('process.chdir is not supported');
+ };
+ process.umask = function() { return 0; };
+
+
+/***/ }),
+/* 5 */
+/***/ (function(module, exports, __webpack_require__) {
+
+
+ /**
+ * This is the common logic for both the Node.js and web browser
+ * implementations of `debug()`.
+ *
+ * Expose `debug()` as the module.
+ */
+
+ exports = module.exports = createDebug.debug = createDebug['default'] = createDebug;
+ exports.coerce = coerce;
+ exports.disable = disable;
+ exports.enable = enable;
+ exports.enabled = enabled;
+ exports.humanize = __webpack_require__(6);
+
+ /**
+ * Active `debug` instances.
+ */
+ exports.instances = [];
+
+ /**
+ * 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, lower or upper-case letter, i.e. "n" and "N".
+ */
+
+ exports.formatters = {};
+
+ /**
+ * Select a color.
+ * @param {String} namespace
+ * @return {Number}
+ * @api private
+ */
+
+ function selectColor(namespace) {
+ var hash = 0, i;
+
+ for (i in namespace) {
+ hash = ((hash << 5) - hash) + namespace.charCodeAt(i);
+ hash |= 0; // Convert to 32bit integer
+ }
+
+ return exports.colors[Math.abs(hash) % exports.colors.length];
+ }
+
+ /**
+ * Create a debugger with the given `namespace`.
+ *
+ * @param {String} namespace
+ * @return {Function}
+ * @api public
+ */
+
+ function createDebug(namespace) {
+
+ var prevTime;
+
+ function debug() {
+ // disabled?
+ if (!debug.enabled) return;
+
+ var self = debug;
+
+ // set `diff` timestamp
+ var curr = +new Date();
+ var ms = curr - (prevTime || curr);
+ self.diff = ms;
+ self.prev = prevTime;
+ self.curr = curr;
+ prevTime = curr;
+
+ // turn the `arguments` into a proper Array
+ var args = new Array(arguments.length);
+ for (var i = 0; i < args.length; i++) {
+ args[i] = arguments[i];
+ }
+
+ args[0] = exports.coerce(args[0]);
+
+ if ('string' !== typeof args[0]) {
+ // anything else let's inspect with %O
+ args.unshift('%O');
+ }
+
+ // apply any `formatters` transformations
+ var index = 0;
+ args[0] = args[0].replace(/%([a-zA-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;
+ });
+
+ // apply env-specific formatting (colors, etc.)
+ exports.formatArgs.call(self, args);
+
+ var logFn = debug.log || exports.log || console.log.bind(console);
+ logFn.apply(self, args);
+ }
+
+ debug.namespace = namespace;
+ debug.enabled = exports.enabled(namespace);
+ debug.useColors = exports.useColors();
+ debug.color = selectColor(namespace);
+ debug.destroy = destroy;
+
+ // env-specific initialization logic for debug instances
+ if ('function' === typeof exports.init) {
+ exports.init(debug);
+ }
+
+ exports.instances.push(debug);
+
+ return debug;
+ }
+
+ function destroy () {
+ var index = exports.instances.indexOf(this);
+ if (index !== -1) {
+ exports.instances.splice(index, 1);
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * 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);
+
+ exports.names = [];
+ exports.skips = [];
+
+ var i;
+ var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\s,]+/);
+ var len = split.length;
+
+ for (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 + '$'));
+ }
+ }
+
+ for (i = 0; i < exports.instances.length; i++) {
+ var instance = exports.instances[i];
+ instance.enabled = exports.enabled(instance.namespace);
+ }
+ }
+
+ /**
+ * 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) {
+ if (name[name.length - 1] === '*') {
+ return true;
+ }
+ 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;
+ }
+
+
+/***/ }),
+/* 6 */
+/***/ (function(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]
+ * @throws {Error} throw an error if val is not a non-empty string or a number
+ * @return {String|Number}
+ * @api public
+ */
+
+ module.exports = function(val, options) {
+ options = options || {};
+ var type = typeof val;
+ if (type === 'string' && val.length > 0) {
+ return parse(val);
+ } else if (type === 'number' && isNaN(val) === false) {
+ return options.long ? fmtLong(val) : fmtShort(val);
+ }
+ throw new Error(
+ 'val is not a non-empty string or a valid number. val=' +
+ JSON.stringify(val)
+ );
+ };
+
+ /**
+ * Parse the given `str` and return milliseconds.
+ *
+ * @param {String} str
+ * @return {Number}
+ * @api private
+ */
+
+ function parse(str) {
+ str = String(str);
+ if (str.length > 100) {
+ 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;
+ default:
+ return undefined;
+ }
+ }
+
+ /**
+ * Short format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+ function fmtShort(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 fmtLong(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';
+ }
+
+
+/***/ }),
+/* 7 */
+/***/ (function(module, exports, __webpack_require__) {
+
+
+ /**
+ * Module dependencies.
+ */
+
+ var debug = __webpack_require__(3)('socket.io-parser');
+ var Emitter = __webpack_require__(8);
+ var binary = __webpack_require__(9);
+ var isArray = __webpack_require__(10);
+ var isBuf = __webpack_require__(11);
+
+ /**
+ * Protocol version.
+ *
+ * @api public
+ */
+
+ exports.protocol = 4;
+
+ /**
+ * Packet types.
+ *
+ * @api public
+ */
+
+ exports.types = [
+ 'CONNECT',
+ 'DISCONNECT',
+ 'EVENT',
+ 'ACK',
+ 'ERROR',
+ 'BINARY_EVENT',
+ 'BINARY_ACK'
+ ];
+
+ /**
+ * Packet type `connect`.
+ *
+ * @api public
+ */
+
+ exports.CONNECT = 0;
+
+ /**
+ * Packet type `disconnect`.
+ *
+ * @api public
+ */
+
+ exports.DISCONNECT = 1;
+
+ /**
+ * Packet type `event`.
+ *
+ * @api public
+ */
+
+ exports.EVENT = 2;
+
+ /**
+ * Packet type `ack`.
+ *
+ * @api public
+ */
+
+ exports.ACK = 3;
+
+ /**
+ * Packet type `error`.
+ *
+ * @api public
+ */
+
+ exports.ERROR = 4;
+
+ /**
+ * Packet type 'binary event'
+ *
+ * @api public
+ */
+
+ exports.BINARY_EVENT = 5;
+
+ /**
+ * Packet type `binary ack`. For acks with binary arguments.
+ *
+ * @api public
+ */
+
+ exports.BINARY_ACK = 6;
+
+ /**
+ * Encoder constructor.
+ *
+ * @api public
+ */
+
+ exports.Encoder = Encoder;
+
+ /**
+ * Decoder constructor.
+ *
+ * @api public
+ */
+
+ exports.Decoder = Decoder;
+
+ /**
+ * A socket.io Encoder instance
+ *
+ * @api public
+ */
+
+ function Encoder() {}
+
+ var ERROR_PACKET = exports.ERROR + '"encode error"';
+
+ /**
+ * Encode a packet as a single string if non-binary, or as a
+ * buffer sequence, depending on packet type.
+ *
+ * @param {Object} obj - packet object
+ * @param {Function} callback - function to handle encodings (likely engine.write)
+ * @return Calls callback with Array of encodings
+ * @api public
+ */
+
+ Encoder.prototype.encode = function(obj, callback){
+ debug('encoding packet %j', obj);
+
+ if (exports.BINARY_EVENT === obj.type || exports.BINARY_ACK === obj.type) {
+ encodeAsBinary(obj, callback);
+ } else {
+ var encoding = encodeAsString(obj);
+ callback([encoding]);
+ }
+ };
+
+ /**
+ * Encode packet as string.
+ *
+ * @param {Object} packet
+ * @return {String} encoded
+ * @api private
+ */
+
+ function encodeAsString(obj) {
+
+ // first is type
+ var str = '' + obj.type;
+
+ // attachments if we have them
+ if (exports.BINARY_EVENT === obj.type || exports.BINARY_ACK === obj.type) {
+ str += obj.attachments + '-';
+ }
+
+ // if we have a namespace other than `/`
+ // we append it followed by a comma `,`
+ if (obj.nsp && '/' !== obj.nsp) {
+ str += obj.nsp + ',';
+ }
+
+ // immediately followed by the id
+ if (null != obj.id) {
+ str += obj.id;
+ }
+
+ // json data
+ if (null != obj.data) {
+ var payload = tryStringify(obj.data);
+ if (payload !== false) {
+ str += payload;
+ } else {
+ return ERROR_PACKET;
+ }
+ }
+
+ debug('encoded %j as %s', obj, str);
+ return str;
+ }
+
+ function tryStringify(str) {
+ try {
+ return JSON.stringify(str);
+ } catch(e){
+ return false;
+ }
+ }
+
+ /**
+ * Encode packet as 'buffer sequence' by removing blobs, and
+ * deconstructing packet into object with placeholders and
+ * a list of buffers.
+ *
+ * @param {Object} packet
+ * @return {Buffer} encoded
+ * @api private
+ */
+
+ function encodeAsBinary(obj, callback) {
+
+ function writeEncoding(bloblessData) {
+ var deconstruction = binary.deconstructPacket(bloblessData);
+ var pack = encodeAsString(deconstruction.packet);
+ var buffers = deconstruction.buffers;
+
+ buffers.unshift(pack); // add packet info to beginning of data list
+ callback(buffers); // write all the buffers
+ }
+
+ binary.removeBlobs(obj, writeEncoding);
+ }
+
+ /**
+ * A socket.io Decoder instance
+ *
+ * @return {Object} decoder
+ * @api public
+ */
+
+ function Decoder() {
+ this.reconstructor = null;
+ }
+
+ /**
+ * Mix in `Emitter` with Decoder.
+ */
+
+ Emitter(Decoder.prototype);
+
+ /**
+ * Decodes an encoded packet string into packet JSON.
+ *
+ * @param {String} obj - encoded packet
+ * @return {Object} packet
+ * @api public
+ */
+
+ Decoder.prototype.add = function(obj) {
+ var packet;
+ if (typeof obj === 'string') {
+ packet = decodeString(obj);
+ if (exports.BINARY_EVENT === packet.type || exports.BINARY_ACK === packet.type) { // binary packet's json
+ this.reconstructor = new BinaryReconstructor(packet);
+
+ // no attachments, labeled binary but no binary data to follow
+ if (this.reconstructor.reconPack.attachments === 0) {
+ this.emit('decoded', packet);
+ }
+ } else { // non-binary full packet
+ this.emit('decoded', packet);
+ }
+ } else if (isBuf(obj) || obj.base64) { // raw binary data
+ if (!this.reconstructor) {
+ throw new Error('got binary data when not reconstructing a packet');
+ } else {
+ packet = this.reconstructor.takeBinaryData(obj);
+ if (packet) { // received final buffer
+ this.reconstructor = null;
+ this.emit('decoded', packet);
+ }
+ }
+ } else {
+ throw new Error('Unknown type: ' + obj);
+ }
+ };
+
+ /**
+ * Decode a packet String (JSON data)
+ *
+ * @param {String} str
+ * @return {Object} packet
+ * @api private
+ */
+
+ function decodeString(str) {
+ var i = 0;
+ // look up type
+ var p = {
+ type: Number(str.charAt(0))
+ };
+
+ if (null == exports.types[p.type]) {
+ return error('unknown packet type ' + p.type);
+ }
+
+ // look up attachments if type binary
+ if (exports.BINARY_EVENT === p.type || exports.BINARY_ACK === p.type) {
+ var buf = '';
+ while (str.charAt(++i) !== '-') {
+ buf += str.charAt(i);
+ if (i == str.length) break;
+ }
+ if (buf != Number(buf) || str.charAt(i) !== '-') {
+ throw new Error('Illegal attachments');
+ }
+ p.attachments = Number(buf);
+ }
+
+ // look up namespace (if any)
+ if ('/' === str.charAt(i + 1)) {
+ p.nsp = '';
+ while (++i) {
+ var c = str.charAt(i);
+ if (',' === c) break;
+ p.nsp += c;
+ if (i === str.length) break;
+ }
+ } else {
+ p.nsp = '/';
+ }
+
+ // look up id
+ var next = str.charAt(i + 1);
+ if ('' !== next && Number(next) == next) {
+ p.id = '';
+ while (++i) {
+ var c = str.charAt(i);
+ if (null == c || Number(c) != c) {
+ --i;
+ break;
+ }
+ p.id += str.charAt(i);
+ if (i === str.length) break;
+ }
+ p.id = Number(p.id);
+ }
+
+ // look up json data
+ if (str.charAt(++i)) {
+ var payload = tryParse(str.substr(i));
+ var isPayloadValid = payload !== false && (p.type === exports.ERROR || isArray(payload));
+ if (isPayloadValid) {
+ p.data = payload;
+ } else {
+ return error('invalid payload');
+ }
+ }
+
+ debug('decoded %s as %j', str, p);
+ return p;
+ }
+
+ function tryParse(str) {
+ try {
+ return JSON.parse(str);
+ } catch(e){
+ return false;
+ }
+ }
+
+ /**
+ * Deallocates a parser's resources
+ *
+ * @api public
+ */
+
+ Decoder.prototype.destroy = function() {
+ if (this.reconstructor) {
+ this.reconstructor.finishedReconstruction();
+ }
+ };
+
+ /**
+ * A manager of a binary event's 'buffer sequence'. Should
+ * be constructed whenever a packet of type BINARY_EVENT is
+ * decoded.
+ *
+ * @param {Object} packet
+ * @return {BinaryReconstructor} initialized reconstructor
+ * @api private
+ */
+
+ function BinaryReconstructor(packet) {
+ this.reconPack = packet;
+ this.buffers = [];
+ }
+
+ /**
+ * Method to be called when binary data received from connection
+ * after a BINARY_EVENT packet.
+ *
+ * @param {Buffer | ArrayBuffer} binData - the raw binary data received
+ * @return {null | Object} returns null if more binary data is expected or
+ * a reconstructed packet object if all buffers have been received.
+ * @api private
+ */
+
+ BinaryReconstructor.prototype.takeBinaryData = function(binData) {
+ this.buffers.push(binData);
+ if (this.buffers.length === this.reconPack.attachments) { // done with buffer list
+ var packet = binary.reconstructPacket(this.reconPack, this.buffers);
+ this.finishedReconstruction();
+ return packet;
+ }
+ return null;
+ };
+
+ /**
+ * Cleans up binary packet reconstruction variables.
+ *
+ * @api private
+ */
+
+ BinaryReconstructor.prototype.finishedReconstruction = function() {
+ this.reconPack = null;
+ this.buffers = [];
+ };
+
+ function error(msg) {
+ return {
+ type: exports.ERROR,
+ data: 'parser error: ' + msg
+ };
+ }
+
+
+/***/ }),
+/* 8 */
+/***/ (function(module, exports, __webpack_require__) {
+
+
+ /**
+ * Expose `Emitter`.
+ */
+
+ if (true) {
+ 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){
+ function on() {
+ this.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;
+ };
+
+
+/***/ }),
+/* 9 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /*global Blob,File*/
+
+ /**
+ * Module requirements
+ */
+
+ var isArray = __webpack_require__(10);
+ var isBuf = __webpack_require__(11);
+ var toString = Object.prototype.toString;
+ var withNativeBlob = typeof Blob === 'function' || (typeof Blob !== 'undefined' && toString.call(Blob) === '[object BlobConstructor]');
+ var withNativeFile = typeof File === 'function' || (typeof File !== 'undefined' && toString.call(File) === '[object FileConstructor]');
+
+ /**
+ * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
+ * Anything with blobs or files should be fed through removeBlobs before coming
+ * here.
+ *
+ * @param {Object} packet - socket.io event packet
+ * @return {Object} with deconstructed packet and list of buffers
+ * @api public
+ */
+
+ exports.deconstructPacket = function(packet) {
+ var buffers = [];
+ var packetData = packet.data;
+ var pack = packet;
+ pack.data = _deconstructPacket(packetData, buffers);
+ pack.attachments = buffers.length; // number of binary 'attachments'
+ return {packet: pack, buffers: buffers};
+ };
+
+ function _deconstructPacket(data, buffers) {
+ if (!data) return data;
+
+ if (isBuf(data)) {
+ var placeholder = { _placeholder: true, num: buffers.length };
+ buffers.push(data);
+ return placeholder;
+ } else if (isArray(data)) {
+ var newData = new Array(data.length);
+ for (var i = 0; i < data.length; i++) {
+ newData[i] = _deconstructPacket(data[i], buffers);
+ }
+ return newData;
+ } else if (typeof data === 'object' && !(data instanceof Date)) {
+ var newData = {};
+ for (var key in data) {
+ newData[key] = _deconstructPacket(data[key], buffers);
+ }
+ return newData;
+ }
+ return data;
+ }
+
+ /**
+ * Reconstructs a binary packet from its placeholder packet and buffers
+ *
+ * @param {Object} packet - event packet with placeholders
+ * @param {Array} buffers - binary buffers to put in placeholder positions
+ * @return {Object} reconstructed packet
+ * @api public
+ */
+
+ exports.reconstructPacket = function(packet, buffers) {
+ packet.data = _reconstructPacket(packet.data, buffers);
+ packet.attachments = undefined; // no longer useful
+ return packet;
+ };
+
+ function _reconstructPacket(data, buffers) {
+ if (!data) return data;
+
+ if (data && data._placeholder) {
+ return buffers[data.num]; // appropriate buffer (should be natural order anyway)
+ } else if (isArray(data)) {
+ for (var i = 0; i < data.length; i++) {
+ data[i] = _reconstructPacket(data[i], buffers);
+ }
+ } else if (typeof data === 'object') {
+ for (var key in data) {
+ data[key] = _reconstructPacket(data[key], buffers);
+ }
+ }
+
+ return data;
+ }
+
+ /**
+ * Asynchronously removes Blobs or Files from data via
+ * FileReader's readAsArrayBuffer method. Used before encoding
+ * data as msgpack. Calls callback with the blobless data.
+ *
+ * @param {Object} data
+ * @param {Function} callback
+ * @api private
+ */
+
+ exports.removeBlobs = function(data, callback) {
+ function _removeBlobs(obj, curKey, containingObject) {
+ if (!obj) return obj;
+
+ // convert any blob
+ if ((withNativeBlob && obj instanceof Blob) ||
+ (withNativeFile && obj instanceof File)) {
+ pendingBlobs++;
+
+ // async filereader
+ var fileReader = new FileReader();
+ fileReader.onload = function() { // this.result == arraybuffer
+ if (containingObject) {
+ containingObject[curKey] = this.result;
+ }
+ else {
+ bloblessData = this.result;
+ }
+
+ // if nothing pending its callback time
+ if(! --pendingBlobs) {
+ callback(bloblessData);
+ }
+ };
+
+ fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
+ } else if (isArray(obj)) { // handle array
+ for (var i = 0; i < obj.length; i++) {
+ _removeBlobs(obj[i], i, obj);
+ }
+ } else if (typeof obj === 'object' && !isBuf(obj)) { // and object
+ for (var key in obj) {
+ _removeBlobs(obj[key], key, obj);
+ }
+ }
+ }
+
+ var pendingBlobs = 0;
+ var bloblessData = data;
+ _removeBlobs(bloblessData);
+ if (!pendingBlobs) {
+ callback(bloblessData);
+ }
+ };
+
+
+/***/ }),
+/* 10 */
+/***/ (function(module, exports) {
+
+ var toString = {}.toString;
+
+ module.exports = Array.isArray || function (arr) {
+ return toString.call(arr) == '[object Array]';
+ };
+
+
+/***/ }),
+/* 11 */
+/***/ (function(module, exports) {
+
+
+ module.exports = isBuf;
+
+ var withNativeBuffer = typeof Buffer === 'function' && typeof Buffer.isBuffer === 'function';
+ var withNativeArrayBuffer = typeof ArrayBuffer === 'function';
+
+ var isView = function (obj) {
+ return typeof ArrayBuffer.isView === 'function' ? ArrayBuffer.isView(obj) : (obj.buffer instanceof ArrayBuffer);
+ };
+
+ /**
+ * Returns true if obj is a buffer or an arraybuffer.
+ *
+ * @api private
+ */
+
+ function isBuf(obj) {
+ return (withNativeBuffer && Buffer.isBuffer(obj)) ||
+ (withNativeArrayBuffer && (obj instanceof ArrayBuffer || isView(obj)));
+ }
+
+
+/***/ }),
+/* 12 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ 'use strict';
+
+ var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+ /**
+ * Module dependencies.
+ */
+
+ var eio = __webpack_require__(13);
+ var Socket = __webpack_require__(36);
+ var Emitter = __webpack_require__(8);
+ var parser = __webpack_require__(7);
+ var on = __webpack_require__(38);
+ var bind = __webpack_require__(39);
+ var debug = __webpack_require__(3)('socket.io-client:manager');
+ var indexOf = __webpack_require__(35);
+ var Backoff = __webpack_require__(40);
+
+ /**
+ * IE6+ hasOwnProperty
+ */
+
+ var has = Object.prototype.hasOwnProperty;
+
+ /**
+ * Module exports
+ */
+
+ module.exports = Manager;
+
+ /**
+ * `Manager` constructor.
+ *
+ * @param {String} engine instance or engine uri/opts
+ * @param {Object} options
+ * @api public
+ */
+
+ function Manager(uri, opts) {
+ if (!(this instanceof Manager)) return new Manager(uri, opts);
+ if (uri && 'object' === (typeof uri === 'undefined' ? 'undefined' : _typeof(uri))) {
+ opts = uri;
+ uri = undefined;
+ }
+ opts = opts || {};
+
+ opts.path = opts.path || '/socket.io';
+ this.nsps = {};
+ this.subs = [];
+ this.opts = opts;
+ this.reconnection(opts.reconnection !== false);
+ this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
+ this.reconnectionDelay(opts.reconnectionDelay || 1000);
+ this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
+ this.randomizationFactor(opts.randomizationFactor || 0.5);
+ this.backoff = new Backoff({
+ min: this.reconnectionDelay(),
+ max: this.reconnectionDelayMax(),
+ jitter: this.randomizationFactor()
+ });
+ this.timeout(null == opts.timeout ? 20000 : opts.timeout);
+ this.readyState = 'closed';
+ this.uri = uri;
+ this.connecting = [];
+ this.lastPing = null;
+ this.encoding = false;
+ this.packetBuffer = [];
+ var _parser = opts.parser || parser;
+ this.encoder = new _parser.Encoder();
+ this.decoder = new _parser.Decoder();
+ this.autoConnect = opts.autoConnect !== false;
+ if (this.autoConnect) this.open();
+ }
+
+ /**
+ * Propagate given event to sockets and emit on `this`
+ *
+ * @api private
+ */
+
+ Manager.prototype.emitAll = function () {
+ this.emit.apply(this, arguments);
+ for (var nsp in this.nsps) {
+ if (has.call(this.nsps, nsp)) {
+ this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
+ }
+ }
+ };
+
+ /**
+ * Update `socket.id` of all sockets
+ *
+ * @api private
+ */
+
+ Manager.prototype.updateSocketIds = function () {
+ for (var nsp in this.nsps) {
+ if (has.call(this.nsps, nsp)) {
+ this.nsps[nsp].id = this.generateId(nsp);
+ }
+ }
+ };
+
+ /**
+ * generate `socket.id` for the given `nsp`
+ *
+ * @param {String} nsp
+ * @return {String}
+ * @api private
+ */
+
+ Manager.prototype.generateId = function (nsp) {
+ return (nsp === '/' ? '' : nsp + '#') + this.engine.id;
+ };
+
+ /**
+ * Mix in `Emitter`.
+ */
+
+ Emitter(Manager.prototype);
+
+ /**
+ * Sets the `reconnection` config.
+ *
+ * @param {Boolean} true/false if it should automatically reconnect
+ * @return {Manager} self or value
+ * @api public
+ */
+
+ Manager.prototype.reconnection = function (v) {
+ if (!arguments.length) return this._reconnection;
+ this._reconnection = !!v;
+ return this;
+ };
+
+ /**
+ * Sets the reconnection attempts config.
+ *
+ * @param {Number} max reconnection attempts before giving up
+ * @return {Manager} self or value
+ * @api public
+ */
+
+ Manager.prototype.reconnectionAttempts = function (v) {
+ if (!arguments.length) return this._reconnectionAttempts;
+ this._reconnectionAttempts = v;
+ return this;
+ };
+
+ /**
+ * Sets the delay between reconnections.
+ *
+ * @param {Number} delay
+ * @return {Manager} self or value
+ * @api public
+ */
+
+ Manager.prototype.reconnectionDelay = function (v) {
+ if (!arguments.length) return this._reconnectionDelay;
+ this._reconnectionDelay = v;
+ this.backoff && this.backoff.setMin(v);
+ return this;
+ };
+
+ Manager.prototype.randomizationFactor = function (v) {
+ if (!arguments.length) return this._randomizationFactor;
+ this._randomizationFactor = v;
+ this.backoff && this.backoff.setJitter(v);
+ return this;
+ };
+
+ /**
+ * Sets the maximum delay between reconnections.
+ *
+ * @param {Number} delay
+ * @return {Manager} self or value
+ * @api public
+ */
+
+ Manager.prototype.reconnectionDelayMax = function (v) {
+ if (!arguments.length) return this._reconnectionDelayMax;
+ this._reconnectionDelayMax = v;
+ this.backoff && this.backoff.setMax(v);
+ return this;
+ };
+
+ /**
+ * Sets the connection timeout. `false` to disable
+ *
+ * @return {Manager} self or value
+ * @api public
+ */
+
+ Manager.prototype.timeout = function (v) {
+ if (!arguments.length) return this._timeout;
+ this._timeout = v;
+ return this;
+ };
+
+ /**
+ * Starts trying to reconnect if reconnection is enabled and we have not
+ * started reconnecting yet
+ *
+ * @api private
+ */
+
+ Manager.prototype.maybeReconnectOnOpen = function () {
+ // Only try to reconnect if it's the first time we're connecting
+ if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
+ // keeps reconnection from firing twice for the same reconnection loop
+ this.reconnect();
+ }
+ };
+
+ /**
+ * Sets the current transport `socket`.
+ *
+ * @param {Function} optional, callback
+ * @return {Manager} self
+ * @api public
+ */
+
+ Manager.prototype.open = Manager.prototype.connect = function (fn, opts) {
+ debug('readyState %s', this.readyState);
+ if (~this.readyState.indexOf('open')) return this;
+
+ debug('opening %s', this.uri);
+ this.engine = eio(this.uri, this.opts);
+ var socket = this.engine;
+ var self = this;
+ this.readyState = 'opening';
+ this.skipReconnect = false;
+
+ // emit `open`
+ var openSub = on(socket, 'open', function () {
+ self.onopen();
+ fn && fn();
+ });
+
+ // emit `connect_error`
+ var errorSub = on(socket, 'error', function (data) {
+ debug('connect_error');
+ self.cleanup();
+ self.readyState = 'closed';
+ self.emitAll('connect_error', data);
+ if (fn) {
+ var err = new Error('Connection error');
+ err.data = data;
+ fn(err);
+ } else {
+ // Only do this if there is no fn to handle the error
+ self.maybeReconnectOnOpen();
+ }
+ });
+
+ // emit `connect_timeout`
+ if (false !== this._timeout) {
+ var timeout = this._timeout;
+ debug('connect attempt will timeout after %d', timeout);
+
+ // set timer
+ var timer = setTimeout(function () {
+ debug('connect attempt timed out after %d', timeout);
+ openSub.destroy();
+ socket.close();
+ socket.emit('error', 'timeout');
+ self.emitAll('connect_timeout', timeout);
+ }, timeout);
+
+ this.subs.push({
+ destroy: function destroy() {
+ clearTimeout(timer);
+ }
+ });
+ }
+
+ this.subs.push(openSub);
+ this.subs.push(errorSub);
+
+ return this;
+ };
+
+ /**
+ * Called upon transport open.
+ *
+ * @api private
+ */
+
+ Manager.prototype.onopen = function () {
+ debug('open');
+
+ // clear old subs
+ this.cleanup();
+
+ // mark as open
+ this.readyState = 'open';
+ this.emit('open');
+
+ // add new subs
+ var socket = this.engine;
+ this.subs.push(on(socket, 'data', bind(this, 'ondata')));
+ this.subs.push(on(socket, 'ping', bind(this, 'onping')));
+ this.subs.push(on(socket, 'pong', bind(this, 'onpong')));
+ this.subs.push(on(socket, 'error', bind(this, 'onerror')));
+ this.subs.push(on(socket, 'close', bind(this, 'onclose')));
+ this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
+ };
+
+ /**
+ * Called upon a ping.
+ *
+ * @api private
+ */
+
+ Manager.prototype.onping = function () {
+ this.lastPing = new Date();
+ this.emitAll('ping');
+ };
+
+ /**
+ * Called upon a packet.
+ *
+ * @api private
+ */
+
+ Manager.prototype.onpong = function () {
+ this.emitAll('pong', new Date() - this.lastPing);
+ };
+
+ /**
+ * Called with data.
+ *
+ * @api private
+ */
+
+ Manager.prototype.ondata = function (data) {
+ this.decoder.add(data);
+ };
+
+ /**
+ * Called when parser fully decodes a packet.
+ *
+ * @api private
+ */
+
+ Manager.prototype.ondecoded = function (packet) {
+ this.emit('packet', packet);
+ };
+
+ /**
+ * Called upon socket error.
+ *
+ * @api private
+ */
+
+ Manager.prototype.onerror = function (err) {
+ debug('error', err);
+ this.emitAll('error', err);
+ };
+
+ /**
+ * Creates a new socket for the given `nsp`.
+ *
+ * @return {Socket}
+ * @api public
+ */
+
+ Manager.prototype.socket = function (nsp, opts) {
+ var socket = this.nsps[nsp];
+ if (!socket) {
+ socket = new Socket(this, nsp, opts);
+ this.nsps[nsp] = socket;
+ var self = this;
+ socket.on('connecting', onConnecting);
+ socket.on('connect', function () {
+ socket.id = self.generateId(nsp);
+ });
+
+ if (this.autoConnect) {
+ // manually call here since connecting event is fired before listening
+ onConnecting();
+ }
+ }
+
+ function onConnecting() {
+ if (!~indexOf(self.connecting, socket)) {
+ self.connecting.push(socket);
+ }
+ }
+
+ return socket;
+ };
+
+ /**
+ * Called upon a socket close.
+ *
+ * @param {Socket} socket
+ */
+
+ Manager.prototype.destroy = function (socket) {
+ var index = indexOf(this.connecting, socket);
+ if (~index) this.connecting.splice(index, 1);
+ if (this.connecting.length) return;
+
+ this.close();
+ };
+
+ /**
+ * Writes a packet.
+ *
+ * @param {Object} packet
+ * @api private
+ */
+
+ Manager.prototype.packet = function (packet) {
+ debug('writing packet %j', packet);
+ var self = this;
+ if (packet.query && packet.type === 0) packet.nsp += '?' + packet.query;
+
+ if (!self.encoding) {
+ // encode, then write to engine with result
+ self.encoding = true;
+ this.encoder.encode(packet, function (encodedPackets) {
+ for (var i = 0; i < encodedPackets.length; i++) {
+ self.engine.write(encodedPackets[i], packet.options);
+ }
+ self.encoding = false;
+ self.processPacketQueue();
+ });
+ } else {
+ // add packet to the queue
+ self.packetBuffer.push(packet);
+ }
+ };
+
+ /**
+ * If packet buffer is non-empty, begins encoding the
+ * next packet in line.
+ *
+ * @api private
+ */
+
+ Manager.prototype.processPacketQueue = function () {
+ if (this.packetBuffer.length > 0 && !this.encoding) {
+ var pack = this.packetBuffer.shift();
+ this.packet(pack);
+ }
+ };
+
+ /**
+ * Clean up transport subscriptions and packet buffer.
+ *
+ * @api private
+ */
+
+ Manager.prototype.cleanup = function () {
+ debug('cleanup');
+
+ var subsLength = this.subs.length;
+ for (var i = 0; i < subsLength; i++) {
+ var sub = this.subs.shift();
+ sub.destroy();
+ }
+
+ this.packetBuffer = [];
+ this.encoding = false;
+ this.lastPing = null;
+
+ this.decoder.destroy();
+ };
+
+ /**
+ * Close the current socket.
+ *
+ * @api private
+ */
+
+ Manager.prototype.close = Manager.prototype.disconnect = function () {
+ debug('disconnect');
+ this.skipReconnect = true;
+ this.reconnecting = false;
+ if ('opening' === this.readyState) {
+ // `onclose` will not fire because
+ // an open event never happened
+ this.cleanup();
+ }
+ this.backoff.reset();
+ this.readyState = 'closed';
+ if (this.engine) this.engine.close();
+ };
+
+ /**
+ * Called upon engine close.
+ *
+ * @api private
+ */
+
+ Manager.prototype.onclose = function (reason) {
+ debug('onclose');
+
+ this.cleanup();
+ this.backoff.reset();
+ this.readyState = 'closed';
+ this.emit('close', reason);
+
+ if (this._reconnection && !this.skipReconnect) {
+ this.reconnect();
+ }
+ };
+
+ /**
+ * Attempt a reconnection.
+ *
+ * @api private
+ */
+
+ Manager.prototype.reconnect = function () {
+ if (this.reconnecting || this.skipReconnect) return this;
+
+ var self = this;
+
+ if (this.backoff.attempts >= this._reconnectionAttempts) {
+ debug('reconnect failed');
+ this.backoff.reset();
+ this.emitAll('reconnect_failed');
+ this.reconnecting = false;
+ } else {
+ var delay = this.backoff.duration();
+ debug('will wait %dms before reconnect attempt', delay);
+
+ this.reconnecting = true;
+ var timer = setTimeout(function () {
+ if (self.skipReconnect) return;
+
+ debug('attempting reconnect');
+ self.emitAll('reconnect_attempt', self.backoff.attempts);
+ self.emitAll('reconnecting', self.backoff.attempts);
+
+ // check again for the case socket closed in above events
+ if (self.skipReconnect) return;
+
+ self.open(function (err) {
+ if (err) {
+ debug('reconnect attempt error');
+ self.reconnecting = false;
+ self.reconnect();
+ self.emitAll('reconnect_error', err.data);
+ } else {
+ debug('reconnect success');
+ self.onreconnect();
+ }
+ });
+ }, delay);
+
+ this.subs.push({
+ destroy: function destroy() {
+ clearTimeout(timer);
+ }
+ });
+ }
+ };
+
+ /**
+ * Called upon successful reconnect.
+ *
+ * @api private
+ */
+
+ Manager.prototype.onreconnect = function () {
+ var attempt = this.backoff.attempts;
+ this.reconnecting = false;
+ this.backoff.reset();
+ this.updateSocketIds();
+ this.emitAll('reconnect', attempt);
+ };
+
+/***/ }),
+/* 13 */
+/***/ (function(module, exports, __webpack_require__) {
+
+
+ module.exports = __webpack_require__(14);
+
+ /**
+ * Exports parser
+ *
+ * @api public
+ *
+ */
+ module.exports.parser = __webpack_require__(21);
+
+
+/***/ }),
+/* 14 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /**
+ * Module dependencies.
+ */
+
+ var transports = __webpack_require__(15);
+ var Emitter = __webpack_require__(8);
+ var debug = __webpack_require__(3)('engine.io-client:socket');
+ var index = __webpack_require__(35);
+ var parser = __webpack_require__(21);
+ var parseuri = __webpack_require__(2);
+ var parseqs = __webpack_require__(29);
+
+ /**
+ * Module exports.
+ */
+
+ module.exports = Socket;
+
+ /**
+ * 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
+ : (typeof location !== 'undefined' && '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 ||
+ (typeof location !== 'undefined' ? location.hostname : 'localhost');
+ this.port = opts.port || (typeof location !== 'undefined' && 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.transportOptions = opts.transportOptions || {};
+ this.readyState = '';
+ this.writeBuffer = [];
+ this.prevBufferLen = 0;
+ 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;
+ this.forceNode = !!opts.forceNode;
+
+ // detect ReactNative environment
+ this.isReactNative = (typeof navigator !== 'undefined' && typeof navigator.product === 'string' && navigator.product.toLowerCase() === 'reactnative');
+
+ // other options for Node.js or ReactNative client
+ if (typeof self === 'undefined' || this.isReactNative) {
+ if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {
+ this.extraHeaders = opts.extraHeaders;
+ }
+
+ if (opts.localAddress) {
+ this.localAddress = opts.localAddress;
+ }
+ }
+
+ // set on handshake
+ this.id = null;
+ this.upgrades = null;
+ this.pingInterval = null;
+ this.pingTimeout = null;
+
+ // set on heartbeat
+ this.pingIntervalTimer = null;
+ this.pingTimeoutTimer = null;
+
+ 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 = __webpack_require__(20);
+ Socket.transports = __webpack_require__(15);
+ Socket.parser = __webpack_require__(21);
+
+ /**
+ * 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;
+
+ // per-transport options
+ var options = this.transportOptions[name] || {};
+
+ // session id if we already have one
+ if (this.id) query.sid = this.id;
+
+ var transport = new transports[name]({
+ query: query,
+ socket: this,
+ agent: options.agent || this.agent,
+ hostname: options.hostname || this.hostname,
+ port: options.port || this.port,
+ secure: options.secure || this.secure,
+ path: options.path || this.path,
+ forceJSONP: options.forceJSONP || this.forceJSONP,
+ jsonp: options.jsonp || this.jsonp,
+ forceBase64: options.forceBase64 || this.forceBase64,
+ enablesXDR: options.enablesXDR || this.enablesXDR,
+ timestampRequests: options.timestampRequests || this.timestampRequests,
+ timestampParam: options.timestampParam || this.timestampParam,
+ policyPort: options.policyPort || this.policyPort,
+ pfx: options.pfx || this.pfx,
+ key: options.key || this.key,
+ passphrase: options.passphrase || this.passphrase,
+ cert: options.cert || this.cert,
+ ca: options.ca || this.ca,
+ ciphers: options.ciphers || this.ciphers,
+ rejectUnauthorized: options.rejectUnauthorized || this.rejectUnauthorized,
+ perMessageDeflate: options.perMessageDeflate || this.perMessageDeflate,
+ extraHeaders: options.extraHeaders || this.extraHeaders,
+ forceNode: options.forceNode || this.forceNode,
+ localAddress: options.localAddress || this.localAddress,
+ requestTimeout: options.requestTimeout || this.requestTimeout,
+ protocols: options.protocols || void (0),
+ isReactNative: this.isReactNative
+ });
+
+ 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 });
+ var failed = false;
+ var 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 ||
+ 'closing' === 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(JSON.parse(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;
+ };
+
+
+/***/ }),
+/* 15 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /**
+ * Module dependencies
+ */
+
+ var XMLHttpRequest = __webpack_require__(16);
+ var XHR = __webpack_require__(18);
+ var JSONP = __webpack_require__(32);
+ var websocket = __webpack_require__(33);
+
+ /**
+ * 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 (typeof location !== 'undefined') {
+ 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);
+ }
+ }
+
+
+/***/ }),
+/* 16 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ // browser shim for xmlhttprequest module
+
+ var hasCORS = __webpack_require__(17);
+
+ 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 self[['Active'].concat('Object').join('X')]('Microsoft.XMLHTTP');
+ } catch (e) { }
+ }
+ };
+
+
+/***/ }),
+/* 17 */
+/***/ (function(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;
+ }
+
+
+/***/ }),
+/* 18 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /* global attachEvent */
+
+ /**
+ * Module requirements.
+ */
+
+ var XMLHttpRequest = __webpack_require__(16);
+ var Polling = __webpack_require__(19);
+ var Emitter = __webpack_require__(8);
+ var inherit = __webpack_require__(30);
+ var debug = __webpack_require__(3)('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);
+ this.requestTimeout = opts.requestTimeout;
+ this.extraHeaders = opts.extraHeaders;
+
+ if (typeof location !== 'undefined') {
+ var isSSL = 'https:' === location.protocol;
+ var port = location.port;
+
+ // some user agents have empty `location.port`
+ if (!port) {
+ port = isSSL ? 443 : 80;
+ }
+
+ this.xd = (typeof location !== 'undefined' && opts.hostname !== location.hostname) ||
+ port !== opts.port;
+ this.xs = opts.secure !== isSSL;
+ }
+ }
+
+ /**
+ * 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;
+ opts.requestTimeout = this.requestTimeout;
+
+ // 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;
+ this.requestTimeout = opts.requestTimeout;
+
+ // 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 && xhr.setDisableHeaderCheck(true);
+ for (var i in this.extraHeaders) {
+ if (this.extraHeaders.hasOwnProperty(i)) {
+ xhr.setRequestHeader(i, this.extraHeaders[i]);
+ }
+ }
+ }
+ } catch (e) {}
+
+ 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) {}
+ }
+
+ try {
+ xhr.setRequestHeader('Accept', '*/*');
+ } catch (e) {}
+
+ // ie6 check
+ if ('withCredentials' in xhr) {
+ xhr.withCredentials = true;
+ }
+
+ if (this.requestTimeout) {
+ xhr.timeout = this.requestTimeout;
+ }
+
+ if (this.hasXDR()) {
+ xhr.onload = function () {
+ self.onLoad();
+ };
+ xhr.onerror = function () {
+ self.onError(xhr.responseText);
+ };
+ } else {
+ xhr.onreadystatechange = function () {
+ if (xhr.readyState === 2) {
+ try {
+ var contentType = xhr.getResponseHeader('Content-Type');
+ if (self.supportsBinary && contentType === 'application/octet-stream') {
+ xhr.responseType = 'arraybuffer';
+ }
+ } catch (e) {}
+ }
+ 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 (typeof document !== 'undefined') {
+ 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 (typeof document !== 'undefined') {
+ 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');
+ } catch (e) {}
+ if (contentType === 'application/octet-stream') {
+ data = this.xhr.response || this.xhr.responseText;
+ } else {
+ data = this.xhr.responseText;
+ }
+ } catch (e) {
+ this.onError(e);
+ }
+ if (null != data) {
+ this.onData(data);
+ }
+ };
+
+ /**
+ * Check if it has XDomainRequest.
+ *
+ * @api private
+ */
+
+ Request.prototype.hasXDR = function () {
+ return typeof XDomainRequest !== 'undefined' && !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.
+ */
+
+ Request.requestsCount = 0;
+ Request.requests = {};
+
+ if (typeof document !== 'undefined') {
+ if (typeof attachEvent === 'function') {
+ attachEvent('onunload', unloadHandler);
+ } else if (typeof addEventListener === 'function') {
+ var terminationEvent = 'onpagehide' in self ? 'pagehide' : 'unload';
+ addEventListener(terminationEvent, unloadHandler, false);
+ }
+ }
+
+ function unloadHandler () {
+ for (var i in Request.requests) {
+ if (Request.requests.hasOwnProperty(i)) {
+ Request.requests[i].abort();
+ }
+ }
+ }
+
+
+/***/ }),
+/* 19 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /**
+ * Module dependencies.
+ */
+
+ var Transport = __webpack_require__(20);
+ var parseqs = __webpack_require__(29);
+ var parser = __webpack_require__(21);
+ var inherit = __webpack_require__(30);
+ var yeast = __webpack_require__(31);
+ var debug = __webpack_require__(3)('engine.io-client:polling');
+
+ /**
+ * Module exports.
+ */
+
+ module.exports = Polling;
+
+ /**
+ * Is XHR2 supported?
+ */
+
+ var hasXHR2 = (function () {
+ var XMLHttpRequest = __webpack_require__(16);
+ 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 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');
+ };
+
+ 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 && Number(this.port) !== 443) ||
+ ('http' === schema && Number(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;
+ };
+
+
+/***/ }),
+/* 20 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /**
+ * Module dependencies.
+ */
+
+ var parser = __webpack_require__(21);
+ var Emitter = __webpack_require__(8);
+
+ /**
+ * 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;
+ this.forceNode = opts.forceNode;
+
+ // results of ReactNative environment detection
+ this.isReactNative = opts.isReactNative;
+
+ // other options for Node.js client
+ this.extraHeaders = opts.extraHeaders;
+ this.localAddress = opts.localAddress;
+ }
+
+ /**
+ * 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');
+ };
+
+
+/***/ }),
+/* 21 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /**
+ * Module dependencies.
+ */
+
+ var keys = __webpack_require__(22);
+ var hasBinary = __webpack_require__(23);
+ var sliceBuffer = __webpack_require__(24);
+ var after = __webpack_require__(25);
+ var utf8 = __webpack_require__(26);
+
+ var base64encoder;
+ if (typeof ArrayBuffer !== 'undefined') {
+ base64encoder = __webpack_require__(27);
+ }
+
+ /**
+ * 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 = typeof navigator !== 'undefined' && /Android/i.test(navigator.userAgent);
+
+ /**
+ * 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 = typeof navigator !== 'undefined' && /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 = __webpack_require__(28);
+
+ /**
+ * Encodes a packet.
+ *
+ * [ ]
+ *
+ * Example:
+ *
+ * 5hello world
+ * 3
+ * 4
+ *
+ * Binary is encoded in an identical principle
+ *
+ * @api private
+ */
+
+ exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
+ if (typeof supportsBinary === 'function') {
+ callback = supportsBinary;
+ supportsBinary = false;
+ }
+
+ if (typeof utf8encode === 'function') {
+ callback = utf8encode;
+ utf8encode = null;
+ }
+
+ var data = (packet.data === undefined)
+ ? undefined
+ : packet.data.buffer || packet.data;
+
+ if (typeof ArrayBuffer !== 'undefined' && data instanceof ArrayBuffer) {
+ return encodeArrayBuffer(packet, supportsBinary, callback);
+ } else if (typeof Blob !== 'undefined' && data instanceof 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), { strict: false }) : 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() {
+ exports.encodePacket({ type: packet.type, data: fr.result }, 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 (typeof Blob !== 'undefined' && packet.data instanceof 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 += 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) {
+ if (data === undefined) {
+ return err;
+ }
+ // String data
+ if (typeof data === 'string') {
+ if (data.charAt(0) === 'b') {
+ return exports.decodeBase64Packet(data.substr(1), binaryType);
+ }
+
+ if (utf8decode) {
+ data = tryDecode(data);
+ if (data === false) {
+ 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 };
+ };
+
+ function tryDecode(data) {
+ try {
+ data = utf8.decode(data, { strict: false });
+ } catch (e) {
+ return false;
+ }
+ return data;
+ }
+
+ /**
+ * 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 (!base64encoder) {
+ 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).
+ *
+ * :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, false, 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;
+ continue;
+ }
+
+ 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, false);
+
+ 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>[...]
+ *
+ * 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 = [];
+
+ 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;
+
+ // 310 = char length of Number.MAX_VALUE
+ if (msgLength.length > 310) {
+ return callback(err, 0, 1);
+ }
+
+ msgLength += tailArray[i];
+ }
+
+ 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);
+ });
+ };
+
+
+/***/ }),
+/* 22 */
+/***/ (function(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;
+ };
+
+
+/***/ }),
+/* 23 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /* global Blob File */
+
+ /*
+ * Module requirements.
+ */
+
+ var isArray = __webpack_require__(10);
+
+ var toString = Object.prototype.toString;
+ var withNativeBlob = typeof Blob === 'function' ||
+ typeof Blob !== 'undefined' && toString.call(Blob) === '[object BlobConstructor]';
+ var withNativeFile = typeof File === 'function' ||
+ typeof File !== 'undefined' && toString.call(File) === '[object FileConstructor]';
+
+ /**
+ * Module exports.
+ */
+
+ module.exports = hasBinary;
+
+ /**
+ * Checks for binary data.
+ *
+ * Supports Buffer, ArrayBuffer, Blob and File.
+ *
+ * @param {Object} anything
+ * @api public
+ */
+
+ function hasBinary (obj) {
+ if (!obj || typeof obj !== 'object') {
+ return false;
+ }
+
+ if (isArray(obj)) {
+ for (var i = 0, l = obj.length; i < l; i++) {
+ if (hasBinary(obj[i])) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ if ((typeof Buffer === 'function' && Buffer.isBuffer && Buffer.isBuffer(obj)) ||
+ (typeof ArrayBuffer === 'function' && obj instanceof ArrayBuffer) ||
+ (withNativeBlob && obj instanceof Blob) ||
+ (withNativeFile && obj instanceof File)
+ ) {
+ return true;
+ }
+
+ // see: https://github.com/Automattic/has-binary/pull/4
+ if (obj.toJSON && typeof obj.toJSON === 'function' && arguments.length === 1) {
+ return hasBinary(obj.toJSON(), true);
+ }
+
+ for (var key in obj) {
+ if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+
+/***/ }),
+/* 24 */
+/***/ (function(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;
+ };
+
+
+/***/ }),
+/* 25 */
+/***/ (function(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() {}
+
+
+/***/ }),
+/* 26 */
+/***/ (function(module, exports) {
+
+ /*! https://mths.be/utf8js v2.1.2 by @mathias */
+
+ 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, strict) {
+ if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
+ if (strict) {
+ throw Error(
+ 'Lone surrogate U+' + codePoint.toString(16).toUpperCase() +
+ ' is not a scalar value'
+ );
+ }
+ return false;
+ }
+ return true;
+ }
+ /*--------------------------------------------------------------------------*/
+
+ function createByte(codePoint, shift) {
+ return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
+ }
+
+ function encodeCodePoint(codePoint, strict) {
+ 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
+ if (!checkScalarValue(codePoint, strict)) {
+ codePoint = 0xFFFD;
+ }
+ 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, opts) {
+ opts = opts || {};
+ var strict = false !== opts.strict;
+
+ var codePoints = ucs2decode(string);
+ var length = codePoints.length;
+ var index = -1;
+ var codePoint;
+ var byteString = '';
+ while (++index < length) {
+ codePoint = codePoints[index];
+ byteString += encodeCodePoint(codePoint, strict);
+ }
+ 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(strict) {
+ 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) {
+ 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) {
+ return checkScalarValue(codePoint, strict) ? codePoint : 0xFFFD;
+ } else {
+ throw Error('Invalid continuation byte');
+ }
+ }
+
+ // 4-byte sequence
+ if ((byte1 & 0xF8) == 0xF0) {
+ byte2 = readContinuationByte();
+ byte3 = readContinuationByte();
+ byte4 = readContinuationByte();
+ codePoint = ((byte1 & 0x07) << 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, opts) {
+ opts = opts || {};
+ var strict = false !== opts.strict;
+
+ byteArray = ucs2decode(byteString);
+ byteCount = byteArray.length;
+ byteIndex = 0;
+ var codePoints = [];
+ var tmp;
+ while ((tmp = decodeSymbol(strict)) !== false) {
+ codePoints.push(tmp);
+ }
+ return ucs2encode(codePoints);
+ }
+
+ module.exports = {
+ version: '2.1.2',
+ encode: utf8encode,
+ decode: utf8decode
+ };
+
+
+/***/ }),
+/* 27 */
+/***/ (function(module, exports) {
+
+ /*
+ * base64-arraybuffer
+ * https://github.com/niklasvh/base64-arraybuffer
+ *
+ * Copyright (c) 2012 Niklas von Hertzen
+ * Licensed under the MIT license.
+ */
+ (function(){
+ "use strict";
+
+ var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+ // Use a lookup table to find the index.
+ var lookup = new Uint8Array(256);
+ for (var i = 0; i < chars.length; i++) {
+ lookup[chars.charCodeAt(i)] = i;
+ }
+
+ 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 = lookup[base64.charCodeAt(i)];
+ encoded2 = lookup[base64.charCodeAt(i+1)];
+ encoded3 = lookup[base64.charCodeAt(i+2)];
+ encoded4 = lookup[base64.charCodeAt(i+3)];
+
+ bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
+ bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
+ bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
+ }
+
+ return arraybuffer;
+ };
+ })();
+
+
+/***/ }),
+/* 28 */
+/***/ (function(module, exports) {
+
+ /**
+ * Create a blob builder even when vendor prefixes exist
+ */
+
+ var BlobBuilder = typeof BlobBuilder !== 'undefined' ? BlobBuilder :
+ typeof WebKitBlobBuilder !== 'undefined' ? WebKitBlobBuilder :
+ typeof MSBlobBuilder !== 'undefined' ? MSBlobBuilder :
+ typeof MozBlobBuilder !== 'undefined' ? MozBlobBuilder :
+ false;
+
+ /**
+ * 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) {
+ return ary.map(function(chunk) {
+ 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;
+ }
+
+ return buf;
+ }
+
+ return chunk;
+ });
+ }
+
+ function BlobBuilderConstructor(ary, options) {
+ options = options || {};
+
+ var bb = new BlobBuilder();
+ mapArrayBufferViews(ary).forEach(function(part) {
+ bb.append(part);
+ });
+
+ return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
+ };
+
+ function BlobConstructor(ary, options) {
+ return new Blob(mapArrayBufferViews(ary), options || {});
+ };
+
+ if (typeof Blob !== 'undefined') {
+ BlobBuilderConstructor.prototype = Blob.prototype;
+ BlobConstructor.prototype = Blob.prototype;
+ }
+
+ module.exports = (function() {
+ if (blobSupported) {
+ return blobSupportsArrayBufferView ? Blob : BlobConstructor;
+ } else if (blobBuilderSupported) {
+ return BlobBuilderConstructor;
+ } else {
+ return undefined;
+ }
+ })();
+
+
+/***/ }),
+/* 29 */
+/***/ (function(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;
+ };
+
+
+/***/ }),
+/* 30 */
+/***/ (function(module, exports) {
+
+
+ module.exports = function(a, b){
+ var fn = function(){};
+ fn.prototype = b.prototype;
+ a.prototype = new fn;
+ a.prototype.constructor = a;
+ };
+
+/***/ }),
+/* 31 */
+/***/ (function(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;
+
+
+/***/ }),
+/* 32 */
+/***/ (function(module, exports, __webpack_require__) {
+
+ /* WEBPACK VAR INJECTION */(function(global) {/**
+ * Module requirements.
+ */
+
+ var Polling = __webpack_require__(19);
+ var inherit = __webpack_require__(30);
+
+ /**
+ * Module exports.
+ */
+
+ module.exports = JSONPPolling;
+
+ /**
+ * Cached regular expressions.
+ */
+
+ var rNewline = /\n/g;
+ var rEscapedNewline = /\\n/g;
+
+ /**
+ * Global JSONP callbacks.
+ */
+
+ var callbacks;
+
+ /**
+ * Noop.
+ */
+
+ function empty () { }
+
+ /**
+ * Until https://github.com/tc39/proposal-global is shipped.
+ */
+ function glob () {
+ return typeof self !== 'undefined' ? self
+ : typeof window !== 'undefined' ? window
+ : typeof global !== 'undefined' ? global : {};
+ }
+
+ /**
+ * 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
+ var global = glob();
+ callbacks = global.___eio = (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 (typeof addEventListener === 'function') {
+ 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 = '