/libs/engine.io-client/1.4.3/engine.io.js
JavaScript | 3872 lines | 2169 code | 672 blank | 1031 comment | 551 complexity | 37bbbe99db35ea7420f80666147d49cf MD5 | raw file
Possible License(s): BSD-3-Clause, Apache-2.0
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- !function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.eio=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
- module.exports = _dereq_('./lib/');
- },{"./lib/":2}],2:[function(_dereq_,module,exports){
- module.exports = _dereq_('./socket');
- /**
- * Exports parser
- *
- * @api public
- *
- */
- module.exports.parser = _dereq_('engine.io-parser');
- },{"./socket":3,"engine.io-parser":17}],3:[function(_dereq_,module,exports){
- (function (global){
- /**
- * Module dependencies.
- */
- var transports = _dereq_('./transports');
- var Emitter = _dereq_('component-emitter');
- var debug = _dereq_('debug')('engine.io-client:socket');
- var index = _dereq_('indexof');
- var parser = _dereq_('engine.io-parser');
- var parseuri = _dereq_('parseuri');
- var parsejson = _dereq_('parsejson');
- var parseqs = _dereq_('parseqs');
- /**
- * Module exports.
- */
- module.exports = Socket;
- /**
- * Noop function.
- *
- * @api private
- */
- function noop(){}
- /**
- * Socket constructor.
- *
- * @param {String|Object} uri or options
- * @param {Object} options
- * @api public
- */
- function Socket(uri, opts){
- if (!(this instanceof Socket)) return new Socket(uri, opts);
- opts = opts || {};
- if (uri && 'object' == typeof uri) {
- opts = uri;
- uri = null;
- }
- if (uri) {
- uri = parseuri(uri);
- opts.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();
- }
- 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.open();
- this.binaryType = null;
- this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
- }
- 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
- });
- 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<j; i++) {
- if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
- }
- return filteredUpgrades;
- };
- }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
- },{"./transport":4,"./transports":5,"component-emitter":12,"debug":14,"engine.io-parser":17,"indexof":25,"parsejson":26,"parseqs":27,"parseuri":28}],4:[function(_dereq_,module,exports){
- /**
- * Module dependencies.
- */
- var parser = _dereq_('engine.io-parser');
- var Emitter = _dereq_('component-emitter');
- /**
- * Module exports.
- */
- module.exports = Transport;
- /**
- * Transport abstract constructor.
- *
- * @param {Object} options.
- * @api private
- */
- function Transport (opts) {
- this.path = opts.path;
- this.hostname = opts.hostname;
- this.port = opts.port;
- this.secure = opts.secure;
- this.query = opts.query;
- this.timestampParam = opts.timestampParam;
- this.timestampRequests = opts.timestampRequests;
- this.readyState = '';
- this.agent = opts.agent || false;
- this.socket = opts.socket;
- this.enablesXDR = opts.enablesXDR;
- }
- /**
- * Mix in `Emitter`.
- */
- Emitter(Transport.prototype);
- /**
- * A counter used to prevent collisions in the timestamps used
- * for cache busting.
- */
- Transport.timestamps = 0;
- /**
- * Emits an error.
- *
- * @param {String} str
- * @return {Transport} for chaining
- * @api public
- */
- Transport.prototype.onError = function (msg, desc) {
- var err = new Error(msg);
- err.type = 'TransportError';
- err.description = desc;
- this.emit('error', err);
- return this;
- };
- /**
- * Opens the transport.
- *
- * @api public
- */
- Transport.prototype.open = function () {
- if ('closed' == this.readyState || '' == this.readyState) {
- this.readyState = 'opening';
- this.doOpen();
- }
- return this;
- };
- /**
- * Closes the transport.
- *
- * @api private
- */
- Transport.prototype.close = function () {
- if ('opening' == this.readyState || 'open' == this.readyState) {
- this.doClose();
- this.onClose();
- }
- return this;
- };
- /**
- * Sends multiple packets.
- *
- * @param {Array} packets
- * @api private
- */
- Transport.prototype.send = function(packets){
- if ('open' == this.readyState) {
- this.write(packets);
- } else {
- throw new Error('Transport not open');
- }
- };
- /**
- * Called upon open
- *
- * @api private
- */
- Transport.prototype.onOpen = function () {
- this.readyState = 'open';
- this.writable = true;
- this.emit('open');
- };
- /**
- * Called with data.
- *
- * @param {String} data
- * @api private
- */
- Transport.prototype.onData = function(data){
- var packet = parser.decodePacket(data, this.socket.binaryType);
- this.onPacket(packet);
- };
- /**
- * Called with a decoded packet.
- */
- Transport.prototype.onPacket = function (packet) {
- this.emit('packet', packet);
- };
- /**
- * Called upon close.
- *
- * @api private
- */
- Transport.prototype.onClose = function () {
- this.readyState = 'closed';
- this.emit('close');
- };
- },{"component-emitter":12,"engine.io-parser":17}],5:[function(_dereq_,module,exports){
- (function (global){
- /**
- * Module dependencies
- */
- var XMLHttpRequest = _dereq_('xmlhttprequest');
- var XHR = _dereq_('./polling-xhr');
- var JSONP = _dereq_('./polling-jsonp');
- var websocket = _dereq_('./websocket');
- /**
- * Export transports.
- */
- exports.polling = polling;
- exports.websocket = websocket;
- /**
- * Polling transport polymorphic constructor.
- * Decides on xhr vs jsonp based on feature detection.
- *
- * @api private
- */
- function polling(opts){
- var xhr;
- var xd = false;
- var xs = false;
- var jsonp = false !== opts.jsonp;
- if (global.location) {
- var isSSL = 'https:' == location.protocol;
- var port = location.port;
- // some user agents have empty `location.port`
- if (!port) {
- port = isSSL ? 443 : 80;
- }
- xd = opts.hostname != location.hostname || port != opts.port;
- xs = opts.secure != isSSL;
- }
- opts.xdomain = xd;
- opts.xscheme = xs;
- xhr = new XMLHttpRequest(opts);
- if ('open' in xhr && !opts.forceJSONP) {
- return new XHR(opts);
- } else {
- if (!jsonp) throw new Error('JSONP disabled');
- return new JSONP(opts);
- }
- }
- }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
- },{"./polling-jsonp":6,"./polling-xhr":7,"./websocket":9,"xmlhttprequest":10}],6:[function(_dereq_,module,exports){
- (function (global){
- /**
- * Module requirements.
- */
- var Polling = _dereq_('./polling');
- var inherit = _dereq_('component-inherit');
- /**
- * Module exports.
- */
- module.exports = JSONPPolling;
- /**
- * Cached regular expressions.
- */
- var rNewline = /\n/g;
- var rEscapedNewline = /\\n/g;
- /**
- * Global JSONP callbacks.
- */
- var callbacks;
- /**
- * Callbacks count.
- */
- var index = 0;
- /**
- * Noop.
- */
- function empty () { }
- /**
- * JSONP Polling constructor.
- *
- * @param {Object} opts.
- * @api public
- */
- function JSONPPolling (opts) {
- Polling.call(this, opts);
- this.query = this.query || {};
- // define global callbacks array if not present
- // we do this here (lazily) to avoid unneeded global pollution
- if (!callbacks) {
- // we need to consider multiple engines in the same page
- if (!global.___eio) global.___eio = [];
- callbacks = global.___eio;
- }
- // callback identifier
- this.index = callbacks.length;
- // add callback to jsonp global
- var self = this;
- callbacks.push(function (msg) {
- self.onData(msg);
- });
- // append to query string
- this.query.j = this.index;
- // prevent spurious errors from being emitted when the window is unloaded
- if (global.document && global.addEventListener) {
- global.addEventListener('beforeunload', function () {
- if (self.script) self.script.onerror = empty;
- }, false);
- }
- }
- /**
- * Inherits from Polling.
- */
- inherit(JSONPPolling, Polling);
- /*
- * JSONP only supports binary as base64 encoded strings
- */
- JSONPPolling.prototype.supportsBinary = false;
- /**
- * Closes the socket.
- *
- * @api private
- */
- JSONPPolling.prototype.doClose = function () {
- if (this.script) {
- this.script.parentNode.removeChild(this.script);
- this.script = null;
- }
- if (this.form) {
- this.form.parentNode.removeChild(this.form);
- this.form = null;
- this.iframe = null;
- }
- Polling.prototype.doClose.call(this);
- };
- /**
- * Starts a poll cycle.
- *
- * @api private
- */
- JSONPPolling.prototype.doPoll = function () {
- var self = this;
- var script = document.createElement('script');
- if (this.script) {
- this.script.parentNode.removeChild(this.script);
- this.script = null;
- }
- script.async = true;
- script.src = this.uri();
- script.onerror = function(e){
- self.onError('jsonp poll error',e);
- };
- var insertAt = document.getElementsByTagName('script')[0];
- insertAt.parentNode.insertBefore(script, insertAt);
- this.script = script;
- var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
-
- if (isUAgecko) {
- setTimeout(function () {
- var iframe = document.createElement('iframe');
- document.body.appendChild(iframe);
- document.body.removeChild(iframe);
- }, 100);
- }
- };
- /**
- * Writes with a hidden iframe.
- *
- * @param {String} data to send
- * @param {Function} called upon flush.
- * @api private
- */
- JSONPPolling.prototype.doWrite = function (data, fn) {
- var self = this;
- if (!this.form) {
- var form = document.createElement('form');
- var area = document.createElement('textarea');
- var id = this.iframeId = 'eio_iframe_' + this.index;
- var iframe;
- form.className = 'socketio';
- form.style.position = 'absolute';
- form.style.top = '-1000px';
- form.style.left = '-1000px';
- form.target = id;
- form.method = 'POST';
- form.setAttribute('accept-charset', 'utf-8');
- area.name = 'd';
- form.appendChild(area);
- document.body.appendChild(form);
- this.form = form;
- this.area = area;
- }
- this.form.action = this.uri();
- function complete () {
- initIframe();
- fn();
- }
- function initIframe () {
- if (self.iframe) {
- try {
- self.form.removeChild(self.iframe);
- } catch (e) {
- self.onError('jsonp polling iframe removal error', e);
- }
- }
- try {
- // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
- var html = '<iframe src="javascript:0" name="'+ self.iframeId +'">';
- iframe = document.createElement(html);
- } catch (e) {
- iframe = document.createElement('iframe');
- iframe.name = self.iframeId;
- iframe.src = 'javascript:0';
- }
- iframe.id = self.iframeId;
- self.form.appendChild(iframe);
- self.iframe = iframe;
- }
- initIframe();
- // escape \n to prevent it from being converted into \r\n by some UAs
- // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
- data = data.replace(rEscapedNewline, '\\\n');
- this.area.value = data.replace(rNewline, '\\n');
- try {
- this.form.submit();
- } catch(e) {}
- if (this.iframe.attachEvent) {
- this.iframe.onreadystatechange = function(){
- if (self.iframe.readyState == 'complete') {
- complete();
- }
- };
- } else {
- this.iframe.onload = complete;
- }
- };
- }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
- },{"./polling":8,"component-inherit":13}],7:[function(_dereq_,module,exports){
- (function (global){
- /**
- * Module requirements.
- */
- var XMLHttpRequest = _dereq_('xmlhttprequest');
- var Polling = _dereq_('./polling');
- var Emitter = _dereq_('component-emitter');
- var inherit = _dereq_('component-inherit');
- var debug = _dereq_('debug')('engine.io-client:polling-xhr');
- /**
- * Module exports.
- */
- module.exports = XHR;
- module.exports.Request = Request;
- /**
- * Empty function
- */
- function empty(){}
- /**
- * XHR Polling constructor.
- *
- * @param {Object} opts
- * @api public
- */
- function XHR(opts){
- Polling.call(this, opts);
- if (global.location) {
- var isSSL = 'https:' == location.protocol;
- var port = location.port;
- // some user agents have empty `location.port`
- if (!port) {
- port = isSSL ? 443 : 80;
- }
- this.xd = opts.hostname != global.location.hostname ||
- port != opts.port;
- this.xs = opts.secure != isSSL;
- }
- }
- /**
- * 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;
- 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.create();
- }
- /**
- * Mix in `Emitter`.
- */
- Emitter(Request.prototype);
- /**
- * Creates the XHR object and sends the request.
- *
- * @api private
- */
- Request.prototype.create = function(){
- var xhr = this.xhr = new XMLHttpRequest({ agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR });
- var self = this;
- try {
- debug('xhr open %s: %s', this.method, this.uri);
- xhr.open(this.method, this.uri, this.async);
- if (this.supportsBinary) {
- // This has to be done after open because Firefox is stupid
- // http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
- xhr.responseType = 'arraybuffer';
- }
- if ('POST' == this.method) {
- try {
- if (this.isBinary) {
- xhr.setRequestHeader('Content-type', 'application/octet-stream');
- } else {
- xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
- }
- } catch (e) {}
- }
- // ie6 check
- if ('withCredentials' in xhr) {
- xhr.withCredentials = true;
- }
- if (this.hasXDR()) {
- xhr.onload = function(){
- self.onLoad();
- };
- xhr.onerror = function(){
- self.onError(xhr.responseText);
- };
- } else {
- xhr.onreadystatechange = function(){
- if (4 != xhr.readyState) return;
- if (200 == xhr.status || 1223 == xhr.status) {
- self.onLoad();
- } else {
- // make sure the `error` event handler that's user-set
- // does not throw in the same tick and gets caught here
- setTimeout(function(){
- self.onError(xhr.status);
- }, 0);
- }
- };
- }
- debug('xhr data %s', this.data);
- xhr.send(this.data);
- } catch (e) {
- // Need to defer since .create() is called directly fhrom the constructor
- // and thus the 'error' event can only be only bound *after* this exception
- // occurs. Therefore, also, we cannot throw here at all.
- setTimeout(function() {
- self.onError(e);
- }, 0);
- return;
- }
- if (global.document) {
- this.index = Request.requestsCount++;
- Request.requests[this.index] = this;
- }
- };
- /**
- * Called upon successful response.
- *
- * @api private
- */
- Request.prototype.onSuccess = function(){
- this.emit('success');
- this.cleanup();
- };
- /**
- * Called if we have data.
- *
- * @api private
- */
- Request.prototype.onData = function(data){
- this.emit('data', data);
- this.onSuccess();
- };
- /**
- * Called upon error.
- *
- * @api private
- */
- Request.prototype.onError = function(err){
- this.emit('error', err);
- this.cleanup();
- };
- /**
- * Cleans up house.
- *
- * @api private
- */
- Request.prototype.cleanup = function(){
- 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;
- }
- try {
- this.xhr.abort();
- } catch(e) {}
- if (global.document) {
- delete Request.requests[this.index];
- }
- this.xhr = null;
- };
- /**
- * Called upon load.
- *
- * @api private
- */
- Request.prototype.onLoad = function(){
- var data;
- try {
- var contentType;
- try {
- contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
- } catch (e) {}
- if (contentType === 'application/octet-stream') {
- data = this.xhr.response;
- } else {
- if (!this.supportsBinary) {
- data = this.xhr.responseText;
- } else {
- data = 'ok';
- }
- }
- } catch (e) {
- this.onError(e);
- }
- if (null != data) {
- this.onData(data);
- }
- };
- /**
- * Check if it has XDomainRequest.
- *
- * @api private
- */
- Request.prototype.hasXDR = function(){
- return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
- };
- /**
- * Aborts the request.
- *
- * @api public
- */
- Request.prototype.abort = function(){
- this.cleanup();
- };
- /**
- * Aborts pending requests when unloading the window. This is needed to prevent
- * memory leaks (e.g. when using IE) and to ensure that no spurious error is
- * emitted.
- */
- if (global.document) {
- Request.requestsCount = 0;
- Request.requests = {};
- if (global.attachEvent) {
- global.attachEvent('onunload', unloadHandler);
- } else if (global.addEventListener) {
- global.addEventListener('beforeunload', unloadHandler, false);
- }
- }
- function unloadHandler() {
- for (var i in Request.requests) {
- if (Request.requests.hasOwnProperty(i)) {
- Request.requests[i].abort();
- }
- }
- }
- }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
- },{"./polling":8,"component-emitter":12,"component-inherit":13,"debug":14,"xmlhttprequest":10}],8:[function(_dereq_,module,exports){
- /**
- * Module dependencies.
- */
- var Transport = _dereq_('../transport');
- var parseqs = _dereq_('parseqs');
- var parser = _dereq_('engine.io-parser');
- var inherit = _dereq_('component-inherit');
- var debug = _dereq_('debug')('engine.io-client:polling');
- /**
- * Module exports.
- */
- module.exports = Polling;
- /**
- * Is XHR2 supported?
- */
- var hasXHR2 = (function() {
- var XMLHttpRequest = _dereq_('xmlhttprequest');
- var xhr = new XMLHttpRequest({ xdomain: false });
- return null != xhr.responseType;
- })();
- /**
- * Polling interface.
- *
- * @param {Object} opts
- * @api private
- */
- function Polling(opts){
- var forceBase64 = (opts && opts.forceBase64);
- if (!hasXHR2 || forceBase64) {
- this.supportsBinary = false;
- }
- Transport.call(this, opts);
- }
- /**
- * Inherits from Transport.
- */
- inherit(Polling, Transport);
- /**
- * Transport name.
- */
- Polling.prototype.name = 'polling';
- /**
- * Opens the socket (triggers polling). We write a PING message to determine
- * when the transport is open.
- *
- * @api private
- */
- Polling.prototype.doOpen = function(){
- this.poll();
- };
- /**
- * Pauses polling.
- *
- * @param {Function} callback upon buffers are flushed and transport is paused
- * @api private
- */
- Polling.prototype.pause = function(onPause){
- var pending = 0;
- var self = this;
- this.readyState = 'pausing';
- function pause(){
- debug('paused');
- self.readyState = 'paused';
- onPause();
- }
- if (this.polling || !this.writable) {
- var total = 0;
- if (this.polling) {
- debug('we are currently polling - waiting to pause');
- total++;
- this.once('pollComplete', function(){
- debug('pre-pause polling complete');
- --total || pause();
- });
- }
- if (!this.writable) {
- debug('we are currently writing - waiting to pause');
- total++;
- this.once('drain', function(){
- debug('pre-pause writing complete');
- --total || pause();
- });
- }
- } else {
- pause();
- }
- };
- /**
- * Starts polling cycle.
- *
- * @api public
- */
- Polling.prototype.poll = function(){
- debug('polling');
- this.polling = true;
- this.doPoll();
- this.emit('poll');
- };
- /**
- * Overloads onData to detect payloads.
- *
- * @api private
- */
- Polling.prototype.onData = function(data){
- var self = this;
- debug('polling got data %s', data);
- var callback = function(packet, index, total) {
- // if its the first message we consider the transport open
- if ('opening' == self.readyState) {
- self.onOpen();
- }
- // if its a close packet, we close the ongoing requests
- if ('close' == packet.type) {
- self.onClose();
- return false;
- }
- // otherwise bypass onData and handle the message
- self.onPacket(packet);
- };
- // decode payload
- parser.decodePayload(data, this.socket.binaryType, callback);
- // if an event did not trigger closing
- if ('closed' != this.readyState) {
- // if we got data we're not polling
- this.polling = false;
- this.emit('pollComplete');
- if ('open' == this.readyState) {
- this.poll();
- } else {
- debug('ignoring poll - transport state "%s"', this.readyState);
- }
- }
- };
- /**
- * For polling, send a close packet.
- *
- * @api private
- */
- Polling.prototype.doClose = function(){
- var self = this;
- function close(){
- debug('writing close packet');
- self.write([{ type: 'close' }]);
- }
- if ('open' == this.readyState) {
- debug('transport open - closing');
- close();
- } else {
- // in case we're trying to close while
- // handshaking is in progress (GH-164)
- debug('transport not open - deferring close');
- this.once('open', close);
- }
- };
- /**
- * Writes a packets payload.
- *
- * @param {Array} data packets
- * @param {Function} drain callback
- * @api private
- */
- Polling.prototype.write = function(packets){
- var self = this;
- this.writable = false;
- var callbackfn = function() {
- self.writable = true;
- self.emit('drain');
- };
- var self = this;
- parser.encodePayload(packets, this.supportsBinary, function(data) {
- self.doWrite(data, callbackfn);
- });
- };
- /**
- * Generates uri for connection.
- *
- * @api private
- */
- Polling.prototype.uri = function(){
- var query = this.query || {};
- var schema = this.secure ? 'https' : 'http';
- var port = '';
- // cache busting is forced
- if (false !== this.timestampRequests) {
- query[this.timestampParam] = +new Date + '-' + Transport.timestamps++;
- }
- if (!this.supportsBinary && !query.sid) {
- query.b64 = 1;
- }
- query = parseqs.encode(query);
- // avoid port if default for schema
- if (this.port && (('https' == schema && this.port != 443) ||
- ('http' == schema && this.port != 80))) {
- port = ':' + this.port;
- }
- // prepend ? to query
- if (query.length) {
- query = '?' + query;
- }
- return schema + '://' + this.hostname + port + this.path + query;
- };
- },{"../transport":4,"component-inherit":13,"debug":14,"engine.io-parser":17,"parseqs":27,"xmlhttprequest":10}],9:[function(_dereq_,module,exports){
- /**
- * Module dependencies.
- */
- var Transport = _dereq_('../transport');
- var parser = _dereq_('engine.io-parser');
- var parseqs = _dereq_('parseqs');
- var inherit = _dereq_('component-inherit');
- var debug = _dereq_('debug')('engine.io-client:websocket');
- /**
- * `ws` exposes a WebSocket-compatible interface in
- * Node, or the `WebSocket` or `MozWebSocket` globals
- * in the browser.
- */
- var WebSocket = _dereq_('ws');
- /**
- * Module exports.
- */
- module.exports = WS;
- /**
- * WebSocket transport constructor.
- *
- * @api {Object} connection options
- * @api public
- */
- function WS(opts){
- var forceBase64 = (opts && opts.forceBase64);
- if (forceBase64) {
- this.supportsBinary = false;
- }
- Transport.call(this, opts);
- }
- /**
- * Inherits from Transport.
- */
- inherit(WS, Transport);
- /**
- * Transport name.
- *
- * @api public
- */
- WS.prototype.name = 'websocket';
- /*
- * WebSockets support binary
- */
- WS.prototype.supportsBinary = true;
- /**
- * Opens socket.
- *
- * @api private
- */
- WS.prototype.doOpen = function(){
- if (!this.check()) {
- // let probe timeout
- return;
- }
- var self = this;
- var uri = this.uri();
- var protocols = void(0);
- var opts = { agent: this.agent };
- this.ws = new WebSocket(uri, protocols, opts);
- if (this.ws.binaryType === undefined) {
- this.supportsBinary = false;
- }
- this.ws.binaryType = 'arraybuffer';
- this.addEventListeners();
- };
- /**
- * Adds event listeners to the socket
- *
- * @api private
- */
- WS.prototype.addEventListeners = function(){
- var self = this;
- this.ws.onopen = function(){
- self.onOpen();
- };
- this.ws.onclose = function(){
- self.onClose();
- };
- this.ws.onmessage = function(ev){
- self.onData(ev.data);
- };
- this.ws.onerror = function(e){
- self.onError('websocket error', e);
- };
- };
- /**
- * Override `onData` to use a timer on iOS.
- * See: https://gist.github.com/mloughran/2052006
- *
- * @api private
- */
- if ('undefined' != typeof navigator
- && /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
- WS.prototype.onData = function(data){
- var self = this;
- setTimeout(function(){
- Transport.prototype.onData.call(self, data);
- }, 0);
- };
- }
- /**
- * Writes data to socket.
- *
- * @param {Array} array of packets.
- * @api private
- */
- WS.prototype.write = function(packets){
- var self = this;
- this.writable = false;
- // encodePacket efficient as it uses WS framing
- // no need for encodePayload
- for (var i = 0, l = packets.length; i < l; i++) {
- parser.encodePacket(packets[i], this.supportsBinary, function(data) {
- //Sometimes the websocket has already been closed but the browser didn't
- //have a chance of informing us about it yet, in that case send will
- //throw an error
- try {
- self.ws.send(data);
- } catch (e){
- debug('websocket closed before onclose event');
- }
- });
- }
- function ondrain() {
- self.writable = true;
- self.emit('drain');
- }
- // fake drain
- // defer to next tick to allow Socket to clear writeBuffer
- setTimeout(ondrain, 0);
- };
- /**
- * Called upon close
- *
- * @api private
- */
- WS.prototype.onClose = function(){
- Transport.prototype.onClose.call(this);
- };
- /**
- * Closes socket.
- *
- * @api private
- */
- WS.prototype.doClose = function(){
- if (typeof this.ws !== 'undefined') {
- this.ws.close();
- }
- };
- /**
- * Generates uri for connection.
- *
- * @api private
- */
- WS.prototype.uri = function(){
- var query = this.query || {};
- var schema = this.secure ? 'wss' : 'ws';
- var port = '';
- // avoid port if default for schema
- if (this.port && (('wss' == schema && this.port != 443)
- || ('ws' == schema && this.port != 80))) {
- port = ':' + this.port;
- }
- // append timestamp to URI
- if (this.timestampRequests) {
- query[this.timestampParam] = +new Date;
- }
- // communicate binary support capabilities
- if (!this.supportsBinary) {
- query.b64 = 1;
- }
- query = parseqs.encode(query);
- // prepend ? to query
- if (query.length) {
- query = '?' + query;
- }
- return schema + '://' + this.hostname + port + this.path + query;
- };
- /**
- * Feature detection for WebSocket.
- *
- * @return {Boolean} whether this transport is available.
- * @api public
- */
- WS.prototype.check = function(){
- return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
- };
- },{"../transport":4,"component-inherit":13,"debug":14,"engine.io-parser":17,"parseqs":27,"ws":29}],10:[function(_dereq_,module,exports){
- // browser shim for xmlhttprequest module
- var hasCORS = _dereq_('has-cors');
- module.exports = function(opts) {
- var xdomain = opts.xdomain;
- // scheme must be same when usign XDomainRequest
- // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
- var xscheme = opts.xscheme;
- // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
- // https://github.com/Automattic/engine.io-client/pull/217
- var enablesXDR = opts.enablesXDR;
- // XMLHttpRequest can be disabled on IE
- try {
- if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
- return new XMLHttpRequest();
- }
- } catch (e) { }
- // Use XDomainRequest for IE8 if enablesXDR is true
- // because loading bar keeps flashing when using jsonp-polling
- // https://github.com/yujiosaka/socke.io-ie8-loading-example
- try {
- if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
- return new XDomainRequest();
- }
- } catch (e) { }
- if (!xdomain) {
- try {
- return new ActiveXObject('Microsoft.XMLHTTP');
- } catch(e) { }
- }
- }
- },{"has-cors":23}],11:[function(_dereq_,module,exports){
- (function (global){
- /**
- * Create a blob builder even when vendor prefixes exist
- */
- var BlobBuilder = global.BlobBuilder
- || global.WebKitBlobBuilder
- || global.MSBlobBuilder
- || global.MozBlobBuilder;
- /**
- * Check if Blob constructor is supported
- */
- var blobSupported = (function() {
- try {
- var b = new Blob(['hi']);
- return b.size == 2;
- } catch(e) {
- return false;
- }
- })();
- /**
- * Check if BlobBuilder is supported
- */
- var blobBuilderSupported = BlobBuilder
- && BlobBuilder.prototype.append
- && BlobBuilder.prototype.getBlob;
- function BlobBuilderConstructor(ary, options) {
- options = options || {};
- var bb = new BlobBuilder();
- for (var i = 0; i < ary.length; i++) {
- bb.append(ary[i]);
- }
- return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
- };
- module.exports = (function() {
- if (blobSupported) {
- return global.Blob;
- } else if (blobBuilderSupported) {
- return BlobBuilderConstructor;
- } else {
- return undefined;
- }
- })();
- }).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
- },{}],12:[function(_dereq_,module,exports){
- /**
- * Expose `Emitter`.
- */
- module.exports = Emitter;
- /**
- * Initialize a new `Emitter`.
- *
- * @api public
- */
- function Emitter(obj) {
- if (obj) return mixin(obj);
- };
- /**
- * Mixin the emitter properties.
- *
- * @param {Object} obj
- * @return {Object}
- * @api private
- */
- function mixin(obj) {
- for (var key in Emitter.prototype) {
- obj[key] = Emitter.prototype[key];
- }
- return obj;
- }
- /**
- * Listen on the given `event` with `fn`.
- *
- * @param {String} event
- * @param {Function} fn
- * @return {Emitter}
- * @api public
- */
- Emitter.prototype.on =
- Emitter.prototype.addEventListener = function(event, fn){
- this._callbacks = this._callbacks || {};
- (this._callbacks[event] = this._callbacks[event] || [])
- .push(fn);
- return this;
- };
- /**
- * Adds an `event` listener that will be invoked a single
- * time then automatically removed.
- *
- * @param {String} event
- * @param {Function} fn
- * @return {Emitter}
- * @api public
- */
- Emitter.prototype.once = function(event, fn){
- var self = this;
- this._callbacks = this._callbacks || {};
- function on() {
- self.off(event, on);
- fn.apply(this, arguments);
- }
- on.fn = fn;
- this.on(event, on);
- return this;
- };
- /**
- * Remove the given callback for `event` or all
- * registered callbacks.
- *
- * @param {String} event
- * @param {Function} fn
- * @return {Emitter}
- * @api public
- */
- Emitter.prototype.off =
- Emitter.prototype.removeListener =
- Emitter.prototype.removeAllListeners =
- Emitter.prototype.removeEventListener = function(event, fn){
- this._callbacks = this._callbacks || {};
- // all
- if (0 == arguments.length) {
- this._callbacks = {};
- return this;
- }
- // specific event
- var callbacks = this._callbacks[event];
- if (!callbacks) return this;
- // remove all handlers
- if (1 == arguments.length) {
- delete this._callbacks[event];
- return this;
- }
- // remove specific handler
- var cb;
- for (var i = 0; i < callbacks.length; i++) {
- cb = callbacks[i];
- if (cb === fn || cb.fn === fn) {
- callbacks.splice(i, 1);
- break;
- }
- }
- return this;
- };
- /**
- * Emit `event` with the given args.
- *
- * @param {String} event
- * @param {Mixed} ...
- * @return {Emitter}
- */
- Emitter.prototype.emit = function(event){
- this._callbacks = this._callbacks || {};
- var args = [].slice.call(arguments, 1)
- , callbacks = this._callbacks[event];
- if (callbacks) {
- callbacks = callbacks.slice(0);
- for (var i = 0, len = callbacks.length; i < len; ++i) {
- callbacks[i].apply(this, args);
- }
- }
- return this;
- };
- /**
- * Return array of callbacks for `event`.
- *
- * @param {String} event
- * @return {Array}
- * @api public
- */
- Emitter.prototype.listeners = function(event){
- this._callbacks = this._callbacks || {};
- return this._callbacks[event] || [];
- };
- /**
- * Check if this emitter has `event` handlers.
- *
- * @param {String} event
- * @return {Boolean}
- * @api public
- */
- Emitter.prototype.hasListeners = function(event){
- return !! this.listeners(event).length;
- };
- },{}],13:[function(_dereq_,module,exports){
- module.exports = function(a, b){
- var fn = function(){};
- fn.prototype = b.prototype;
- a.prototype = new fn;
- a.prototype.constructor = a;
- };
- },{}],14:[function(_dereq_,module,exports){
- /**
- * This is the web browser implementation of `debug()`.
- *
- * Expose `debug()` as the module.
- */
- exports = module.exports = _dereq_('./debug');
- exports.log = log;
- exports.formatArgs = formatArgs;
- exports.save = save;
- exports.load = load;
- exports.useColors = useColors;
- /**
- * Colors.
- */
- exports.colors = [
- 'lightseagreen',
- 'forestgreen',
- 'goldenrod',
- 'dodgerblue',
- 'darkorchid',
- 'crimson'
- ];
- /**
- * Currently only WebKit-based Web Inspectors, Firefox >= v31,
- * and the Firebug extension (any Firefox version) are known
- * to support "%c" CSS customizations.
- *
- * TODO: add a `localStorage` variable to explicitly enable/disable colors
- */
- function useColors() {
- // is webkit? http://stackoverflow.com/a/16459606/376773
- return ('WebkitAppearance' in document.documentElement.style) ||
- // is firebug? http://stackoverflow.com/a/398120/376773
- (window.console && (console.firebug || (console.exception && console.table))) ||
- // is firefox >= v31?
- // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messag…
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