diff --git a/.idea/workspace.xml b/.idea/workspace.xml index dc3d2aa..9e49856 100644 --- a/.idea/workspace.xml +++ b/.idea/workspace.xml @@ -4,18 +4,13 @@ @@ -82,7 +78,7 @@ - + @@ -115,8 +111,8 @@ - + @@ -142,11 +138,23 @@ - + + + 1680082088939 + + + + + \ No newline at end of file diff --git a/assets/socketio.js b/assets/socketio.js new file mode 100644 index 0000000..2fe163f --- /dev/null +++ b/assets/socketio.js @@ -0,0 +1,6991 @@ +export default ()=>{ + !function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.io=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o 0 && !this.encoding) { + var pack = this.packetBuffer.shift(); + this.packet(pack); + } + }; + + /** + * Clean up transport subscriptions and packet buffer. + * + * @api private + */ + + Manager.prototype.cleanup = function(){ + var sub; + while (sub = this.subs.shift()) sub.destroy(); + + this.packetBuffer = []; + this.encoding = false; + + this.decoder.destroy(); + }; + + /** + * Close the current socket. + * + * @api private + */ + + Manager.prototype.close = + Manager.prototype.disconnect = function(){ + this.skipReconnect = true; + this.backoff.reset(); + this.readyState = 'closed'; + this.engine && this.engine.close(); + }; + + /** + * Called upon engine close. + * + * @api private + */ + + Manager.prototype.onclose = function(reason){ + debug('close'); + 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(){ + 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); + }; + + },{"./on":4,"./socket":5,"./url":6,"backo2":7,"component-bind":8,"component-emitter":9,"debug":10,"engine.io-client":11,"indexof":40,"object-component":41,"socket.io-parser":44}],4:[function(_dereq_,module,exports){ + + /** + * Module exports. + */ + + module.exports = on; + + /** + * Helper for subscriptions. + * + * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter` + * @param {String} event name + * @param {Function} callback + * @api public + */ + + function on(obj, ev, fn) { + obj.on(ev, fn); + return { + destroy: function(){ + obj.removeListener(ev, fn); + } + }; + } + + },{}],5:[function(_dereq_,module,exports){ + + /** + * Module dependencies. + */ + + var parser = _dereq_('socket.io-parser'); + var Emitter = _dereq_('component-emitter'); + var toArray = _dereq_('to-array'); + var on = _dereq_('./on'); + var bind = _dereq_('component-bind'); + var debug = _dereq_('debug')('socket.io-client:socket'); + var hasBin = _dereq_('has-binary'); + + /** + * Module exports. + */ + + module.exports = exports = Socket; + + /** + * Internal events (blacklisted). + * These events can't be emitted by the user. + * + * @api private + */ + + var events = { + connect: 1, + connect_error: 1, + connect_timeout: 1, + disconnect: 1, + error: 1, + reconnect: 1, + reconnect_attempt: 1, + reconnect_failed: 1, + reconnect_error: 1, + reconnecting: 1 + }; + + /** + * Shortcut to `Emitter#emit`. + */ + + var emit = Emitter.prototype.emit; + + /** + * `Socket` constructor. + * + * @api public + */ + + function Socket(io, nsp){ + this.io = io; + this.nsp = nsp; + this.json = this; // compat + this.ids = 0; + this.acks = {}; + if (this.io.autoConnect) this.open(); + this.receiveBuffer = []; + this.sendBuffer = []; + this.connected = false; + this.disconnected = true; + } + + /** + * Mix in `Emitter`. + */ + + Emitter(Socket.prototype); + + /** + * Subscribe to open, close and packet events + * + * @api private + */ + + Socket.prototype.subEvents = function() { + if (this.subs) return; + + var io = this.io; + this.subs = [ + on(io, 'open', bind(this, 'onopen')), + on(io, 'packet', bind(this, 'onpacket')), + on(io, 'close', bind(this, 'onclose')) + ]; + }; + + /** + * "Opens" the socket. + * + * @api public + */ + + Socket.prototype.open = + Socket.prototype.connect = function(){ + if (this.connected) return this; + + this.subEvents(); + this.io.open(); // ensure open + if ('open' == this.io.readyState) this.onopen(); + return this; + }; + + /** + * Sends a `message` event. + * + * @return {Socket} self + * @api public + */ + + Socket.prototype.send = function(){ + var args = toArray(arguments); + args.unshift('message'); + this.emit.apply(this, args); + return this; + }; + + /** + * Override `emit`. + * If the event is in `events`, it's emitted normally. + * + * @param {String} event name + * @return {Socket} self + * @api public + */ + + Socket.prototype.emit = function(ev){ + if (events.hasOwnProperty(ev)) { + emit.apply(this, arguments); + return this; + } + + var args = toArray(arguments); + var parserType = parser.EVENT; // default + if (hasBin(args)) { parserType = parser.BINARY_EVENT; } // binary + var packet = { type: parserType, data: args }; + + // event ack callback + if ('function' == typeof args[args.length - 1]) { + debug('emitting packet with ack id %d', this.ids); + this.acks[this.ids] = args.pop(); + packet.id = this.ids++; + } + + if (this.connected) { + this.packet(packet); + } else { + this.sendBuffer.push(packet); + } + + return this; + }; + + /** + * Sends a packet. + * + * @param {Object} packet + * @api private + */ + + Socket.prototype.packet = function(packet){ + packet.nsp = this.nsp; + this.io.packet(packet); + }; + + /** + * Called upon engine `open`. + * + * @api private + */ + + Socket.prototype.onopen = function(){ + debug('transport is open - connecting'); + + // write connect packet if necessary + if ('/' != this.nsp) { + this.packet({ type: parser.CONNECT }); + } + }; + + /** + * Called upon engine `close`. + * + * @param {String} reason + * @api private + */ + + Socket.prototype.onclose = function(reason){ + debug('close (%s)', reason); + this.connected = false; + this.disconnected = true; + delete this.id; + this.emit('disconnect', reason); + }; + + /** + * Called with socket packet. + * + * @param {Object} packet + * @api private + */ + + Socket.prototype.onpacket = function(packet){ + if (packet.nsp != this.nsp) return; + + switch (packet.type) { + case parser.CONNECT: + this.onconnect(); + break; + + case parser.EVENT: + this.onevent(packet); + break; + + case parser.BINARY_EVENT: + this.onevent(packet); + break; + + case parser.ACK: + this.onack(packet); + break; + + case parser.BINARY_ACK: + this.onack(packet); + break; + + case parser.DISCONNECT: + this.ondisconnect(); + break; + + case parser.ERROR: + this.emit('error', packet.data); + break; + } + }; + + /** + * Called upon a server event. + * + * @param {Object} packet + * @api private + */ + + Socket.prototype.onevent = function(packet){ + var args = packet.data || []; + debug('emitting event %j', args); + + if (null != packet.id) { + debug('attaching ack callback to event'); + args.push(this.ack(packet.id)); + } + + if (this.connected) { + emit.apply(this, args); + } else { + this.receiveBuffer.push(args); + } + }; + + /** + * Produces an ack callback to emit with an event. + * + * @api private + */ + + Socket.prototype.ack = function(id){ + var self = this; + var sent = false; + return function(){ + // prevent double callbacks + if (sent) return; + sent = true; + var args = toArray(arguments); + debug('sending ack %j', args); + + var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK; + self.packet({ + type: type, + id: id, + data: args + }); + }; + }; + + /** + * Called upon a server acknowlegement. + * + * @param {Object} packet + * @api private + */ + + Socket.prototype.onack = function(packet){ + debug('calling ack %s with %j', packet.id, packet.data); + var fn = this.acks[packet.id]; + fn.apply(this, packet.data); + delete this.acks[packet.id]; + }; + + /** + * Called upon server connect. + * + * @api private + */ + + Socket.prototype.onconnect = function(){ + this.connected = true; + this.disconnected = false; + this.emit('connect'); + this.emitBuffered(); + }; + + /** + * Emit buffered events (received and emitted). + * + * @api private + */ + + Socket.prototype.emitBuffered = function(){ + var i; + for (i = 0; i < this.receiveBuffer.length; i++) { + emit.apply(this, this.receiveBuffer[i]); + } + this.receiveBuffer = []; + + for (i = 0; i < this.sendBuffer.length; i++) { + this.packet(this.sendBuffer[i]); + } + this.sendBuffer = []; + }; + + /** + * Called upon server disconnect. + * + * @api private + */ + + Socket.prototype.ondisconnect = function(){ + debug('server disconnect (%s)', this.nsp); + this.destroy(); + this.onclose('io server disconnect'); + }; + + /** + * Called upon forced client/server side disconnections, + * this method ensures the manager stops tracking us and + * that reconnections don't get triggered for this. + * + * @api private. + */ + + Socket.prototype.destroy = function(){ + if (this.subs) { + // clean subscriptions to avoid reconnections + for (var i = 0; i < this.subs.length; i++) { + this.subs[i].destroy(); + } + this.subs = null; + } + + this.io.destroy(this); + }; + + /** + * Disconnects the socket manually. + * + * @return {Socket} self + * @api public + */ + + Socket.prototype.close = + Socket.prototype.disconnect = function(){ + if (this.connected) { + debug('performing disconnect (%s)', this.nsp); + this.packet({ type: parser.DISCONNECT }); + } + + // remove socket from pool + this.destroy(); + + if (this.connected) { + // fire events + this.onclose('io client disconnect'); + } + return this; + }; + + },{"./on":4,"component-bind":8,"component-emitter":9,"debug":10,"has-binary":36,"socket.io-parser":44,"to-array":48}],6:[function(_dereq_,module,exports){ + (function (global){ + + /** + * Module dependencies. + */ + + var parseuri = _dereq_('parseuri'); + var debug = _dereq_('debug')('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 + var loc = loc || global.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.hostname + 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 || '/'; + + // define unique id + obj.id = obj.protocol + '://' + obj.host + ':' + obj.port; + // define href + obj.href = obj.protocol + '://' + obj.host + (loc && loc.port == obj.port ? '' : (':' + obj.port)); + + return obj; + } + + }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) + },{"debug":10,"parseuri":42}],7:[function(_dereq_,module,exports){ + + /** + * Expose `Backoff`. + */ + + module.exports = Backoff; + + /** + * Initialize backoff timer with `opts`. + * + * - `min` initial timeout in milliseconds [100] + * - `max` max timeout [10000] + * - `jitter` [0] + * - `factor` [2] + * + * @param {Object} opts + * @api public + */ + + function Backoff(opts) { + opts = opts || {}; + this.ms = opts.min || 100; + this.max = opts.max || 10000; + this.factor = opts.factor || 2; + this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0; + this.attempts = 0; + } + + /** + * Return the backoff duration. + * + * @return {Number} + * @api public + */ + + Backoff.prototype.duration = function(){ + var ms = this.ms * Math.pow(this.factor, this.attempts++); + if (this.jitter) { + var rand = Math.random(); + var deviation = Math.floor(rand * this.jitter * ms); + ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation; + } + return Math.min(ms, this.max) | 0; + }; + + /** + * Reset the number of attempts. + * + * @api public + */ + + Backoff.prototype.reset = function(){ + this.attempts = 0; + }; + + /** + * Set the minimum duration + * + * @api public + */ + + Backoff.prototype.setMin = function(min){ + this.ms = min; + }; + + /** + * Set the maximum duration + * + * @api public + */ + + Backoff.prototype.setMax = function(max){ + this.max = max; + }; + + /** + * Set the jitter + * + * @api public + */ + + Backoff.prototype.setJitter = function(jitter){ + this.jitter = jitter; + }; + + + },{}],8:[function(_dereq_,module,exports){ + /** + * Slice reference. + */ + + var slice = [].slice; + + /** + * Bind `obj` to `fn`. + * + * @param {Object} obj + * @param {Function|String} fn or string + * @return {Function} + * @api public + */ + + module.exports = function(obj, fn){ + if ('string' == typeof fn) fn = obj[fn]; + if ('function' != typeof fn) throw new Error('bind() requires a function'); + var args = slice.call(arguments, 2); + return function(){ + return fn.apply(obj, args.concat(slice.call(arguments))); + } + }; + + },{}],9:[function(_dereq_,module,exports){ + + /** + * Expose `Emitter`. + */ + + module.exports = Emitter; + + /** + * Initialize a new `Emitter`. + * + * @api public + */ + + function Emitter(obj) { + if (obj) return mixin(obj); + }; + + /** + * Mixin the emitter properties. + * + * @param {Object} obj + * @return {Object} + * @api private + */ + + function mixin(obj) { + for (var key in Emitter.prototype) { + obj[key] = Emitter.prototype[key]; + } + return obj; + } + + /** + * Listen on the given `event` with `fn`. + * + * @param {String} event + * @param {Function} fn + * @return {Emitter} + * @api public + */ + + Emitter.prototype.on = + Emitter.prototype.addEventListener = function(event, fn){ + this._callbacks = this._callbacks || {}; + (this._callbacks[event] = this._callbacks[event] || []) + .push(fn); + return this; + }; + + /** + * Adds an `event` listener that will be invoked a single + * time then automatically removed. + * + * @param {String} event + * @param {Function} fn + * @return {Emitter} + * @api public + */ + + Emitter.prototype.once = function(event, fn){ + var self = this; + this._callbacks = this._callbacks || {}; + + function on() { + self.off(event, on); + fn.apply(this, arguments); + } + + on.fn = fn; + this.on(event, on); + return this; + }; + + /** + * Remove the given callback for `event` or all + * registered callbacks. + * + * @param {String} event + * @param {Function} fn + * @return {Emitter} + * @api public + */ + + Emitter.prototype.off = + Emitter.prototype.removeListener = + Emitter.prototype.removeAllListeners = + Emitter.prototype.removeEventListener = function(event, fn){ + this._callbacks = this._callbacks || {}; + + // all + if (0 == arguments.length) { + this._callbacks = {}; + return this; + } + + // specific event + var callbacks = this._callbacks[event]; + if (!callbacks) return this; + + // remove all handlers + if (1 == arguments.length) { + delete this._callbacks[event]; + return this; + } + + // remove specific handler + var cb; + for (var i = 0; i < callbacks.length; i++) { + cb = callbacks[i]; + if (cb === fn || cb.fn === fn) { + callbacks.splice(i, 1); + break; + } + } + return this; + }; + + /** + * Emit `event` with the given args. + * + * @param {String} event + * @param {Mixed} ... + * @return {Emitter} + */ + + Emitter.prototype.emit = function(event){ + this._callbacks = this._callbacks || {}; + var args = [].slice.call(arguments, 1) + , callbacks = this._callbacks[event]; + + if (callbacks) { + callbacks = callbacks.slice(0); + for (var i = 0, len = callbacks.length; i < len; ++i) { + callbacks[i].apply(this, args); + } + } + + return this; + }; + + /** + * Return array of callbacks for `event`. + * + * @param {String} event + * @return {Array} + * @api public + */ + + Emitter.prototype.listeners = function(event){ + this._callbacks = this._callbacks || {}; + return this._callbacks[event] || []; + }; + + /** + * Check if this emitter has `event` handlers. + * + * @param {String} event + * @return {Boolean} + * @api public + */ + + Emitter.prototype.hasListeners = function(event){ + return !! this.listeners(event).length; + }; + + },{}],10:[function(_dereq_,module,exports){ + + /** + * Expose `debug()` as the module. + */ + + module.exports = debug; + + /** + * Create a debugger with the given `name`. + * + * @param {String} name + * @return {Type} + * @api public + */ + + function debug(name) { + if (!debug.enabled(name)) return function(){}; + + return function(fmt){ + fmt = coerce(fmt); + + var curr = new Date; + var ms = curr - (debug[name] || curr); + debug[name] = curr; + + fmt = name + + ' ' + + fmt + + ' +' + debug.humanize(ms); + + // This hackery is required for IE8 + // where `console.log` doesn't have 'apply' + window.console + && console.log + && Function.prototype.apply.call(console.log, console, arguments); + } + } + + /** + * The currently active debug mode names. + */ + + debug.names = []; + debug.skips = []; + + /** + * Enables a debug mode by name. This can include modes + * separated by a colon and wildcards. + * + * @param {String} name + * @api public + */ + + debug.enable = function(name) { + try { + localStorage.debug = name; + } catch(e){} + + var split = (name || '').split(/[\s,]+/) + , len = split.length; + + for (var i = 0; i < len; i++) { + name = split[i].replace('*', '.*?'); + if (name[0] === '-') { + debug.skips.push(new RegExp('^' + name.substr(1) + '$')); + } + else { + debug.names.push(new RegExp('^' + name + '$')); + } + } + }; + + /** + * Disable debug output. + * + * @api public + */ + + debug.disable = function(){ + debug.enable(''); + }; + + /** + * Humanize the given `ms`. + * + * @param {Number} m + * @return {String} + * @api private + */ + + debug.humanize = function(ms) { + var sec = 1000 + , min = 60 * 1000 + , hour = 60 * min; + + if (ms >= hour) return (ms / hour).toFixed(1) + 'h'; + if (ms >= min) return (ms / min).toFixed(1) + 'm'; + if (ms >= sec) return (ms / sec | 0) + 's'; + return ms + 'ms'; + }; + + /** + * Returns true if the given mode name is enabled, false otherwise. + * + * @param {String} name + * @return {Boolean} + * @api public + */ + + debug.enabled = function(name) { + for (var i = 0, len = debug.skips.length; i < len; i++) { + if (debug.skips[i].test(name)) { + return false; + } + } + for (var i = 0, len = debug.names.length; i < len; i++) { + if (debug.names[i].test(name)) { + return true; + } + } + return false; + }; + + /** + * Coerce `val`. + */ + + function coerce(val) { + if (val instanceof Error) return val.stack || val.message; + return val; + } + +// persist + + try { + if (window.localStorage) debug.enable(localStorage.debug); + } catch(e){} + + },{}],11:[function(_dereq_,module,exports){ + + module.exports = _dereq_('./lib/'); + + },{"./lib/":12}],12:[function(_dereq_,module,exports){ + + module.exports = _dereq_('./socket'); + + /** + * Exports parser + * + * @api public + * + */ + module.exports.parser = _dereq_('engine.io-parser'); + + },{"./socket":13,"engine.io-parser":25}],13:[function(_dereq_,module,exports){ + (function (global){ + /** + * Module dependencies. + */ + + var transports = _dereq_('./transports'); + var Emitter = _dereq_('component-emitter'); + var debug = _dereq_('debug')('engine.io-client:socket'); + var index = _dereq_('indexof'); + var parser = _dereq_('engine.io-parser'); + var parseuri = _dereq_('parseuri'); + var parsejson = _dereq_('parsejson'); + var parseqs = _dereq_('parseqs'); + + /** + * Module exports. + */ + + module.exports = Socket; + + /** + * Noop function. + * + * @api private + */ + + function noop(){} + + /** + * Socket constructor. + * + * @param {String|Object} uri or options + * @param {Object} options + * @api public + */ + + function Socket(uri, opts){ + if (!(this instanceof Socket)) return new Socket(uri, opts); + + opts = opts || {}; + + if (uri && 'object' == typeof uri) { + opts = uri; + uri = null; + } + + if (uri) { + uri = parseuri(uri); + opts.host = uri.host; + opts.secure = uri.protocol == 'https' || uri.protocol == 'wss'; + opts.port = uri.port; + if (uri.query) opts.query = uri.query; + } + + this.secure = null != opts.secure ? opts.secure : + (global.location && 'https:' == location.protocol); + + if (opts.host) { + var pieces = opts.host.split(':'); + opts.hostname = pieces.shift(); + if (pieces.length) { + opts.port = pieces.pop(); + } else if (!opts.port) { + // if no port is specified manually, use the protocol default + opts.port = this.secure ? '443' : '80'; + } + } + + this.agent = opts.agent || false; + this.hostname = opts.hostname || + (global.location ? location.hostname : 'localhost'); + this.port = opts.port || (global.location && location.port ? + location.port : + (this.secure ? 443 : 80)); + this.query = opts.query || {}; + if ('string' == typeof this.query) this.query = parseqs.decode(this.query); + this.upgrade = false !== opts.upgrade; + this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/'; + this.forceJSONP = !!opts.forceJSONP; + this.jsonp = false !== opts.jsonp; + this.forceBase64 = !!opts.forceBase64; + this.enablesXDR = !!opts.enablesXDR; + this.timestampParam = opts.timestampParam || 't'; + this.timestampRequests = opts.timestampRequests; + this.transports = opts.transports || ['polling', 'websocket']; + this.readyState = ''; + this.writeBuffer = []; + this.callbackBuffer = []; + this.policyPort = opts.policyPort || 843; + this.rememberUpgrade = opts.rememberUpgrade || false; + this.binaryType = null; + this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades; + + // 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 || 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 = _dereq_('./transport'); + Socket.transports = _dereq_('./transports'); + Socket.parser = _dereq_('engine.io-parser'); + + /** + * Creates transport of the given type. + * + * @param {String} transport name + * @return {Transport} + * @api private + */ + + Socket.prototype.createTransport = function (name) { + debug('creating transport "%s"', name); + var query = clone(this.query); + + // append engine.io protocol identifier + query.EIO = parser.protocol; + + // transport name + query.transport = name; + + // session id if we already have one + if (this.id) query.sid = this.id; + + var transport = new transports[name]({ + agent: this.agent, + hostname: this.hostname, + port: this.port, + secure: this.secure, + path: this.path, + query: query, + forceJSONP: this.forceJSONP, + jsonp: this.jsonp, + forceBase64: this.forceBase64, + enablesXDR: this.enablesXDR, + timestampRequests: this.timestampRequests, + timestampParam: this.timestampParam, + policyPort: this.policyPort, + socket: this, + pfx: this.pfx, + key: this.key, + passphrase: this.passphrase, + cert: this.cert, + ca: this.ca, + ciphers: this.ciphers, + rejectUnauthorized: this.rejectUnauthorized + }); + + 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) + var transport; + try { + transport = this.createTransport(transport); + } catch (e) { + this.transports.shift(); + this.open(); + return; + } + + transport.open(); + this.setTransport(transport); + }; + + /** + * Sets the current transport. Disables the existing one (if any). + * + * @api private + */ + + Socket.prototype.setTransport = function(transport){ + debug('setting transport %s', transport.name); + var self = this; + + if (this.transport) { + debug('clearing existing transport %s', this.transport.name); + this.transport.removeAllListeners(); + } + + // set up transport + this.transport = transport; + + // set up transport listeners + transport + .on('drain', function(){ + self.onDrain(); + }) + .on('packet', function(packet){ + self.onPacket(packet); + }) + .on('error', function(e){ + self.onError(e); + }) + .on('close', function(){ + self.onClose('transport close'); + }); + }; + + /** + * Probes a transport. + * + * @param {String} transport name + * @api private + */ + + Socket.prototype.probe = function (name) { + debug('probing transport "%s"', name); + var transport = this.createTransport(name, { probe: 1 }) + , failed = false + , self = this; + + Socket.priorWebsocketSuccess = false; + + function onTransportOpen(){ + if (self.onlyBinaryUpgrades) { + var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary; + failed = failed || upgradeLosesBinary; + } + if (failed) return; + + debug('probe transport "%s" opened', name); + transport.send([{ type: 'ping', data: 'probe' }]); + transport.once('packet', function (msg) { + if (failed) return; + if ('pong' == msg.type && 'probe' == msg.data) { + debug('probe transport "%s" pong', name); + self.upgrading = true; + self.emit('upgrading', transport); + if (!transport) return; + Socket.priorWebsocketSuccess = 'websocket' == transport.name; + + debug('pausing current transport "%s"', self.transport.name); + self.transport.pause(function () { + if (failed) return; + if ('closed' == self.readyState) return; + debug('changing transport and sending upgrade packet'); + + cleanup(); + + self.setTransport(transport); + transport.send([{ type: 'upgrade' }]); + self.emit('upgrade', transport); + transport = null; + self.upgrading = false; + self.flush(); + }); + } else { + debug('probe transport "%s" failed', name); + var err = new Error('probe error'); + err.transport = transport.name; + self.emit('upgradeError', err); + } + }); + } + + function freezeTransport() { + if (failed) return; + + // Any callback called by transport should be ignored since now + failed = true; + + cleanup(); + + transport.close(); + transport = null; + } + + //Handle any error that happens while probing + function onerror(err) { + var error = new Error('probe error: ' + err); + error.transport = transport.name; + + freezeTransport(); + + debug('probe transport "%s" failed because of error: %s', name, err); + + self.emit('upgradeError', error); + } + + function onTransportClose(){ + onerror("transport closed"); + } + + //When the socket is closed while we're probing + function onclose(){ + onerror("socket closed"); + } + + //When the socket is upgraded while we're probing + function onupgrade(to){ + if (transport && to.name != transport.name) { + debug('"%s" works - aborting "%s"', to.name, transport.name); + freezeTransport(); + } + } + + //Remove all listeners on the transport and on self + function cleanup(){ + transport.removeListener('open', onTransportOpen); + transport.removeListener('error', onerror); + transport.removeListener('close', onTransportClose); + self.removeListener('close', onclose); + self.removeListener('upgrading', onupgrade); + } + + transport.once('open', onTransportOpen); + transport.once('error', onerror); + transport.once('close', onTransportClose); + + this.once('close', onclose); + this.once('upgrading', onupgrade); + + transport.open(); + + }; + + /** + * Called when connection is deemed open. + * + * @api public + */ + + Socket.prototype.onOpen = function () { + debug('socket open'); + this.readyState = 'open'; + Socket.priorWebsocketSuccess = 'websocket' == this.transport.name; + this.emit('open'); + this.flush(); + + // we check for `readyState` in case an `open` + // listener already closed the socket + if ('open' == this.readyState && this.upgrade && this.transport.pause) { + debug('starting upgrade probes'); + for (var i = 0, l = this.upgrades.length; i < l; i++) { + this.probe(this.upgrades[i]); + } + } + }; + + /** + * Handles a packet. + * + * @api private + */ + + Socket.prototype.onPacket = function (packet) { + if ('opening' == this.readyState || 'open' == this.readyState) { + debug('socket receive: type "%s", data "%s"', packet.type, packet.data); + + this.emit('packet', packet); + + // Socket is live - any packet counts + this.emit('heartbeat'); + + switch (packet.type) { + case 'open': + this.onHandshake(parsejson(packet.data)); + break; + + case 'pong': + this.setPing(); + break; + + case 'error': + var err = new Error('server error'); + err.code = packet.data; + this.emit('error', 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 public + */ + + Socket.prototype.ping = function () { + this.sendPacket('ping'); + }; + + /** + * Called on `drain` event + * + * @api private + */ + + Socket.prototype.onDrain = function() { + for (var i = 0; i < this.prevBufferLen; i++) { + if (this.callbackBuffer[i]) { + this.callbackBuffer[i](); + } + } + + this.writeBuffer.splice(0, this.prevBufferLen); + this.callbackBuffer.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 (this.writeBuffer.length == 0) { + 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. + * @return {Socket} for chaining. + * @api public + */ + + Socket.prototype.write = + Socket.prototype.send = function (msg, fn) { + this.sendPacket('message', msg, fn); + return this; + }; + + /** + * Sends a packet. + * + * @param {String} packet type. + * @param {String} data. + * @param {Function} callback function. + * @api private + */ + + Socket.prototype.sendPacket = function (type, data, fn) { + if ('closing' == this.readyState || 'closed' == this.readyState) { + return; + } + + var packet = { type: type, data: data }; + this.emit('packetCreate', packet); + this.writeBuffer.push(packet); + this.callbackBuffer.push(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; + + 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); + } + + if (this.writeBuffer.length) { + this.once('drain', function() { + if (this.upgrading) { + waitForUpgrade(); + } else { + close(); + } + }); + } else if (this.upgrading) { + waitForUpgrade(); + } else { + close(); + } + } + + 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); + + // clean buffers in next tick, so developers can still + // grab the buffers on `close` event + setTimeout(function() { + self.writeBuffer = []; + self.callbackBuffer = []; + self.prevBufferLen = 0; + }, 0); + + // 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); + } + }; + + /** + * 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