1027 lines
22 KiB
JavaScript
1027 lines
22 KiB
JavaScript
/*!
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* socket.io-node
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* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
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* MIT Licensed
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*/
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/**
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* Module dependencies.
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*/
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var fs = require('fs')
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, url = require('url')
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, tty = require('tty')
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, crypto = require('crypto')
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, util = require('./util')
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, store = require('./store')
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, client = require('socket.io-client')
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, transports = require('./transports')
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, Logger = require('./logger')
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, Socket = require('./socket')
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, MemoryStore = require('./stores/memory')
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, SocketNamespace = require('./namespace')
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, Static = require('./static')
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, EventEmitter = process.EventEmitter;
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/**
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* Export the constructor.
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*/
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exports = module.exports = Manager;
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/**
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* Default transports.
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*/
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var defaultTransports = exports.defaultTransports = [
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'websocket'
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, 'htmlfile'
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, 'xhr-polling'
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, 'jsonp-polling'
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];
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/**
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* Inherited defaults.
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*/
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var parent = module.parent.exports
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, protocol = parent.protocol
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, jsonpolling_re = /^\d+$/;
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/**
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* Manager constructor.
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*
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* @param {HTTPServer} server
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* @param {Object} options, optional
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* @api public
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*/
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function Manager (server, options) {
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this.server = server;
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this.namespaces = {};
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this.sockets = this.of('');
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this.settings = {
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origins: '*:*'
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, log: true
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, store: new MemoryStore
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, logger: new Logger
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, static: new Static(this)
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, heartbeats: true
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, resource: '/socket.io'
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, transports: defaultTransports
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, authorization: false
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, blacklist: ['disconnect']
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, 'log level': 3
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, 'log colors': tty.isatty(process.stdout.fd)
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, 'close timeout': 60
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, 'heartbeat interval': 25
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, 'heartbeat timeout': 60
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, 'polling duration': 20
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, 'flash policy server': true
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, 'flash policy port': 10843
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, 'destroy upgrade': true
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, 'destroy buffer size': 10E7
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, 'browser client': true
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, 'browser client cache': true
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, 'browser client minification': false
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, 'browser client etag': false
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, 'browser client expires': 315360000
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, 'browser client gzip': false
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, 'browser client handler': false
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, 'client store expiration': 15
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, 'match origin protocol': false
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};
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for (var i in options) {
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if (options.hasOwnProperty(i)) {
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this.settings[i] = options[i];
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}
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}
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var self = this;
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// default error handler
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server.on('error', function(err) {
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self.log.warn('error raised: ' + err);
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});
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this.initStore();
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this.on('set:store', function() {
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self.initStore();
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});
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// reset listeners
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this.oldListeners = server.listeners('request').splice(0);
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server.removeAllListeners('request');
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server.on('request', function (req, res) {
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self.handleRequest(req, res);
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});
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server.on('upgrade', function (req, socket, head) {
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self.handleUpgrade(req, socket, head);
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});
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server.on('close', function () {
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clearInterval(self.gc);
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});
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server.once('listening', function () {
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self.gc = setInterval(self.garbageCollection.bind(self), 10000);
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});
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for (var i in transports) {
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if (transports.hasOwnProperty(i)) {
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if (transports[i].init) {
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transports[i].init(this);
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}
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}
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}
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// forward-compatibility with 1.0
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var self = this;
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this.sockets.on('connection', function (conn) {
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self.emit('connection', conn);
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});
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this.sequenceNumber = Date.now() | 0;
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this.log.info('socket.io started');
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};
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Manager.prototype.__proto__ = EventEmitter.prototype
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/**
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* Store accessor shortcut.
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*
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* @api public
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*/
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Manager.prototype.__defineGetter__('store', function () {
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var store = this.get('store');
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store.manager = this;
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return store;
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});
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/**
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* Logger accessor.
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*
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* @api public
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*/
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Manager.prototype.__defineGetter__('log', function () {
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var logger = this.get('logger');
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logger.level = this.get('log level') || -1;
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logger.colors = this.get('log colors');
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logger.enabled = this.enabled('log');
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return logger;
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});
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/**
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* Static accessor.
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*
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* @api public
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*/
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Manager.prototype.__defineGetter__('static', function () {
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return this.get('static');
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});
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/**
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* Get settings.
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*
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* @api public
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*/
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Manager.prototype.get = function (key) {
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return this.settings[key];
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};
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/**
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* Set settings
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*
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* @api public
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*/
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Manager.prototype.set = function (key, value) {
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if (arguments.length == 1) return this.get(key);
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this.settings[key] = value;
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this.emit('set:' + key, this.settings[key], key);
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return this;
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};
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/**
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* Enable a setting
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*
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* @api public
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*/
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Manager.prototype.enable = function (key) {
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this.settings[key] = true;
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this.emit('set:' + key, this.settings[key], key);
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return this;
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};
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/**
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* Disable a setting
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*
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* @api public
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*/
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Manager.prototype.disable = function (key) {
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this.settings[key] = false;
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this.emit('set:' + key, this.settings[key], key);
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return this;
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};
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/**
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* Checks if a setting is enabled
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*
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* @api public
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*/
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Manager.prototype.enabled = function (key) {
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return !!this.settings[key];
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};
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/**
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* Checks if a setting is disabled
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*
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* @api public
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*/
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Manager.prototype.disabled = function (key) {
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return !this.settings[key];
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};
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/**
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* Configure callbacks.
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*
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* @api public
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*/
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Manager.prototype.configure = function (env, fn) {
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if ('function' == typeof env) {
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env.call(this);
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} else if (env == (process.env.NODE_ENV || 'development')) {
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fn.call(this);
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}
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return this;
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};
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/**
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* Initializes everything related to the message dispatcher.
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*
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* @api private
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*/
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Manager.prototype.initStore = function () {
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this.handshaken = {};
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this.connected = {};
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this.open = {};
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this.closed = {};
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this.rooms = {};
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this.roomClients = {};
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var self = this;
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this.store.subscribe('handshake', function (id, data) {
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self.onHandshake(id, data);
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});
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this.store.subscribe('connect', function (id) {
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self.onConnect(id);
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});
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this.store.subscribe('open', function (id) {
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self.onOpen(id);
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});
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this.store.subscribe('join', function (id, room) {
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self.onJoin(id, room);
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});
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this.store.subscribe('leave', function (id, room) {
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self.onLeave(id, room);
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});
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this.store.subscribe('close', function (id) {
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self.onClose(id);
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});
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this.store.subscribe('dispatch', function (room, packet, volatile, exceptions) {
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self.onDispatch(room, packet, volatile, exceptions);
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});
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this.store.subscribe('disconnect', function (id) {
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self.onDisconnect(id);
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});
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};
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/**
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* Called when a client handshakes.
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*
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* @param text
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*/
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Manager.prototype.onHandshake = function (id, data) {
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this.handshaken[id] = data;
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};
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/**
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* Called when a client connects (ie: transport first opens)
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*
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* @api private
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*/
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Manager.prototype.onConnect = function (id) {
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this.connected[id] = true;
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};
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/**
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* Called when a client opens a request in a different node.
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*
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* @api private
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*/
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Manager.prototype.onOpen = function (id) {
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this.open[id] = true;
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if (this.closed[id]) {
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var self = this;
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this.store.unsubscribe('dispatch:' + id, function () {
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var transport = self.transports[id];
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if (self.closed[id] && self.closed[id].length && transport) {
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// if we have buffered messages that accumulate between calling
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// onOpen an this async callback, send them if the transport is
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// still open, otherwise leave them buffered
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if (transport.open) {
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transport.payload(self.closed[id]);
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self.closed[id] = [];
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}
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}
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});
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}
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// clear the current transport
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if (this.transports[id]) {
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this.transports[id].discard();
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this.transports[id] = null;
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}
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};
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/**
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* Called when a message is sent to a namespace and/or room.
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*
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* @api private
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*/
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Manager.prototype.onDispatch = function (room, packet, volatile, exceptions) {
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if (this.rooms[room]) {
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for (var i = 0, l = this.rooms[room].length; i < l; i++) {
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var id = this.rooms[room][i];
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if (!~exceptions.indexOf(id)) {
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if (this.transports[id] && this.transports[id].open) {
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this.transports[id].onDispatch(packet, volatile);
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} else if (!volatile) {
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this.onClientDispatch(id, packet);
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}
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}
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}
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}
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};
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/**
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* Called when a client joins a nsp / room.
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*
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* @api private
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*/
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Manager.prototype.onJoin = function (id, name) {
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if (!this.roomClients[id]) {
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this.roomClients[id] = {};
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}
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if (!this.rooms[name]) {
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this.rooms[name] = [];
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}
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if (!~this.rooms[name].indexOf(id)) {
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this.rooms[name].push(id);
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this.roomClients[id][name] = true;
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}
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};
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/**
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* Called when a client leaves a nsp / room.
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*
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* @param private
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*/
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Manager.prototype.onLeave = function (id, room) {
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if (this.rooms[room]) {
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var index = this.rooms[room].indexOf(id);
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if (index >= 0) {
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this.rooms[room].splice(index, 1);
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}
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if (!this.rooms[room].length) {
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delete this.rooms[room];
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}
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if (this.roomClients[id]) {
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delete this.roomClients[id][room];
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}
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}
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};
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/**
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* Called when a client closes a request in different node.
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*
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* @api private
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*/
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Manager.prototype.onClose = function (id) {
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if (this.open[id]) {
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delete this.open[id];
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}
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this.closed[id] = [];
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var self = this;
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this.store.subscribe('dispatch:' + id, function (packet, volatile) {
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if (!volatile) {
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self.onClientDispatch(id, packet);
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}
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});
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};
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/**
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* Dispatches a message for a closed client.
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*
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* @api private
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*/
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Manager.prototype.onClientDispatch = function (id, packet) {
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if (this.closed[id]) {
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this.closed[id].push(packet);
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}
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};
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/**
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* Receives a message for a client.
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*
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* @api private
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*/
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Manager.prototype.onClientMessage = function (id, packet) {
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if (this.namespaces[packet.endpoint]) {
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this.namespaces[packet.endpoint].handlePacket(id, packet);
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}
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};
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/**
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* Fired when a client disconnects (not triggered).
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*
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* @api private
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*/
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Manager.prototype.onClientDisconnect = function (id, reason) {
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for (var name in this.namespaces) {
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if (this.namespaces.hasOwnProperty(name)) {
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this.namespaces[name].handleDisconnect(id, reason, typeof this.roomClients[id] !== 'undefined' &&
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typeof this.roomClients[id][name] !== 'undefined');
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}
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}
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this.onDisconnect(id);
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};
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/**
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* Called when a client disconnects.
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*
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* @param text
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*/
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Manager.prototype.onDisconnect = function (id, local) {
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delete this.handshaken[id];
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if (this.open[id]) {
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delete this.open[id];
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}
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if (this.connected[id]) {
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delete this.connected[id];
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}
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if (this.transports[id]) {
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this.transports[id].discard();
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delete this.transports[id];
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}
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if (this.closed[id]) {
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delete this.closed[id];
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}
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if (this.roomClients[id]) {
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for (var room in this.roomClients[id]) {
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if (this.roomClients[id].hasOwnProperty(room)) {
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this.onLeave(id, room);
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}
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}
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delete this.roomClients[id]
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}
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this.store.destroyClient(id, this.get('client store expiration'));
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this.store.unsubscribe('dispatch:' + id);
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if (local) {
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this.store.unsubscribe('message:' + id);
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this.store.unsubscribe('disconnect:' + id);
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}
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};
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/**
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* Handles an HTTP request.
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*
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* @api private
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*/
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Manager.prototype.handleRequest = function (req, res) {
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var data = this.checkRequest(req);
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if (!data) {
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for (var i = 0, l = this.oldListeners.length; i < l; i++) {
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this.oldListeners[i].call(this.server, req, res);
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}
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return;
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}
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if (data.static || !data.transport && !data.protocol) {
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if (data.static && this.enabled('browser client')) {
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this.static.write(data.path, req, res);
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} else {
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res.writeHead(200);
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res.end('Welcome to socket.io.');
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this.log.info('unhandled socket.io url');
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}
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return;
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}
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if (data.protocol != protocol) {
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res.writeHead(500);
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res.end('Protocol version not supported.');
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this.log.info('client protocol version unsupported');
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} else {
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if (data.id) {
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this.handleHTTPRequest(data, req, res);
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} else {
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this.handleHandshake(data, req, res);
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}
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}
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};
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|
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/**
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* Handles an HTTP Upgrade.
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*
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* @api private
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*/
|
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|
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Manager.prototype.handleUpgrade = function (req, socket, head) {
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var data = this.checkRequest(req)
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, self = this;
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if (!data) {
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if (this.enabled('destroy upgrade')) {
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socket.end();
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this.log.debug('destroying non-socket.io upgrade');
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}
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return;
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}
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req.head = head;
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this.handleClient(data, req);
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};
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|
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/**
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* Handles a normal handshaken HTTP request (eg: long-polling)
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*
|
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* @api private
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|
*/
|
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|
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Manager.prototype.handleHTTPRequest = function (data, req, res) {
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req.res = res;
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this.handleClient(data, req);
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};
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|
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/**
|
|
* Intantiantes a new client.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.handleClient = function (data, req) {
|
|
var socket = req.socket
|
|
, store = this.store
|
|
, self = this;
|
|
|
|
// handle sync disconnect xhrs
|
|
if (undefined != data.query.disconnect) {
|
|
if (this.transports[data.id] && this.transports[data.id].open) {
|
|
this.transports[data.id].onForcedDisconnect();
|
|
} else {
|
|
this.store.publish('disconnect-force:' + data.id);
|
|
}
|
|
req.res.writeHead(200);
|
|
req.res.end();
|
|
return;
|
|
}
|
|
|
|
if (!~this.get('transports').indexOf(data.transport)) {
|
|
this.log.warn('unknown transport: "' + data.transport + '"');
|
|
req.connection.end();
|
|
return;
|
|
}
|
|
|
|
var transport = new transports[data.transport](this, data, req)
|
|
, handshaken = this.handshaken[data.id];
|
|
|
|
if (transport.disconnected) {
|
|
// failed during transport setup
|
|
req.connection.end();
|
|
return;
|
|
}
|
|
if (handshaken) {
|
|
if (transport.open) {
|
|
if (this.closed[data.id] && this.closed[data.id].length) {
|
|
transport.payload(this.closed[data.id]);
|
|
this.closed[data.id] = [];
|
|
}
|
|
|
|
this.onOpen(data.id);
|
|
this.store.publish('open', data.id);
|
|
this.transports[data.id] = transport;
|
|
}
|
|
|
|
if (!this.connected[data.id]) {
|
|
this.onConnect(data.id);
|
|
this.store.publish('connect', data.id);
|
|
|
|
// flag as used
|
|
delete handshaken.issued;
|
|
this.onHandshake(data.id, handshaken);
|
|
this.store.publish('handshake', data.id, handshaken);
|
|
|
|
// initialize the socket for all namespaces
|
|
for (var i in this.namespaces) {
|
|
if (this.namespaces.hasOwnProperty(i)) {
|
|
var socket = this.namespaces[i].socket(data.id, true);
|
|
|
|
// echo back connect packet and fire connection event
|
|
if (i === '') {
|
|
this.namespaces[i].handlePacket(data.id, { type: 'connect' });
|
|
}
|
|
}
|
|
}
|
|
|
|
this.store.subscribe('message:' + data.id, function (packet) {
|
|
self.onClientMessage(data.id, packet);
|
|
});
|
|
|
|
this.store.subscribe('disconnect:' + data.id, function (reason) {
|
|
self.onClientDisconnect(data.id, reason);
|
|
});
|
|
}
|
|
} else {
|
|
if (transport.open) {
|
|
transport.error('client not handshaken', 'reconnect');
|
|
}
|
|
|
|
transport.discard();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Generates a session id.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.generateId = function () {
|
|
var rand = new Buffer(15); // multiple of 3 for base64
|
|
if (!rand.writeInt32BE) {
|
|
return Math.abs(Math.random() * Math.random() * Date.now() | 0).toString()
|
|
+ Math.abs(Math.random() * Math.random() * Date.now() | 0).toString();
|
|
}
|
|
this.sequenceNumber = (this.sequenceNumber + 1) | 0;
|
|
rand.writeInt32BE(this.sequenceNumber, 11);
|
|
if (crypto.randomBytes) {
|
|
crypto.randomBytes(12).copy(rand);
|
|
} else {
|
|
// not secure for node 0.4
|
|
[0, 4, 8].forEach(function(i) {
|
|
rand.writeInt32BE(Math.random() * Math.pow(2, 32) | 0, i);
|
|
});
|
|
}
|
|
return rand.toString('base64').replace(/\//g, '_').replace(/\+/g, '-');
|
|
};
|
|
|
|
/**
|
|
* Handles a handshake request.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.handleHandshake = function (data, req, res) {
|
|
var self = this
|
|
, origin = req.headers.origin
|
|
, headers = {
|
|
'Content-Type': 'text/plain'
|
|
};
|
|
|
|
function writeErr (status, message) {
|
|
if (data.query.jsonp && jsonpolling_re.test(data.query.jsonp)) {
|
|
res.writeHead(200, { 'Content-Type': 'application/javascript' });
|
|
res.end('io.j[' + data.query.jsonp + '](new Error("' + message + '"));');
|
|
} else {
|
|
res.writeHead(status, headers);
|
|
res.end(message);
|
|
}
|
|
};
|
|
|
|
function error (err) {
|
|
writeErr(500, 'handshake error');
|
|
self.log.warn('handshake error ' + err);
|
|
};
|
|
|
|
if (!this.verifyOrigin(req)) {
|
|
writeErr(403, 'handshake bad origin');
|
|
return;
|
|
}
|
|
|
|
var handshakeData = this.handshakeData(data);
|
|
|
|
if (origin) {
|
|
// https://developer.mozilla.org/En/HTTP_Access_Control
|
|
headers['Access-Control-Allow-Origin'] = origin;
|
|
headers['Access-Control-Allow-Credentials'] = 'true';
|
|
}
|
|
|
|
this.authorize(handshakeData, function (err, authorized, newData) {
|
|
if (err) return error(err);
|
|
|
|
if (authorized) {
|
|
var id = self.generateId()
|
|
, hs = [
|
|
id
|
|
, self.enabled('heartbeats') ? self.get('heartbeat timeout') || '' : ''
|
|
, self.get('close timeout') || ''
|
|
, self.transports(data).join(',')
|
|
].join(':');
|
|
|
|
if (data.query.jsonp && jsonpolling_re.test(data.query.jsonp)) {
|
|
hs = 'io.j[' + data.query.jsonp + '](' + JSON.stringify(hs) + ');';
|
|
res.writeHead(200, { 'Content-Type': 'application/javascript' });
|
|
} else {
|
|
res.writeHead(200, headers);
|
|
}
|
|
|
|
res.end(hs);
|
|
|
|
self.onHandshake(id, newData || handshakeData);
|
|
self.store.publish('handshake', id, newData || handshakeData);
|
|
|
|
self.log.info('handshake authorized', id);
|
|
} else {
|
|
writeErr(403, 'handshake unauthorized');
|
|
self.log.info('handshake unauthorized');
|
|
}
|
|
})
|
|
};
|
|
|
|
/**
|
|
* Gets normalized handshake data
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.handshakeData = function (data) {
|
|
var connection = data.request.connection
|
|
, connectionAddress
|
|
, date = new Date;
|
|
|
|
if (connection.remoteAddress) {
|
|
connectionAddress = {
|
|
address: connection.remoteAddress
|
|
, port: connection.remotePort
|
|
};
|
|
} else if (connection.socket && connection.socket.remoteAddress) {
|
|
connectionAddress = {
|
|
address: connection.socket.remoteAddress
|
|
, port: connection.socket.remotePort
|
|
};
|
|
}
|
|
|
|
return {
|
|
headers: data.headers
|
|
, address: connectionAddress
|
|
, time: date.toString()
|
|
, query: data.query
|
|
, url: data.request.url
|
|
, xdomain: !!data.request.headers.origin
|
|
, secure: data.request.connection.secure
|
|
, issued: +date
|
|
};
|
|
};
|
|
|
|
/**
|
|
* Verifies the origin of a request.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.verifyOrigin = function (request) {
|
|
var origin = request.headers.origin || request.headers.referer
|
|
, origins = this.get('origins');
|
|
|
|
if (origin === 'null') origin = '*';
|
|
|
|
if (origins.indexOf('*:*') !== -1) {
|
|
return true;
|
|
}
|
|
|
|
if (origin) {
|
|
try {
|
|
var parts = url.parse(origin);
|
|
parts.port = parts.port || 80;
|
|
var ok =
|
|
~origins.indexOf(parts.hostname + ':' + parts.port) ||
|
|
~origins.indexOf(parts.hostname + ':*') ||
|
|
~origins.indexOf('*:' + parts.port);
|
|
if (!ok) this.log.warn('illegal origin: ' + origin);
|
|
return ok;
|
|
} catch (ex) {
|
|
this.log.warn('error parsing origin');
|
|
}
|
|
}
|
|
else {
|
|
this.log.warn('origin missing from handshake, yet required by config');
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* Handles an incoming packet.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.handlePacket = function (sessid, packet) {
|
|
this.of(packet.endpoint || '').handlePacket(sessid, packet);
|
|
};
|
|
|
|
/**
|
|
* Performs authentication.
|
|
*
|
|
* @param Object client request data
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.authorize = function (data, fn) {
|
|
if (this.get('authorization')) {
|
|
var self = this;
|
|
|
|
this.get('authorization').call(this, data, function (err, authorized) {
|
|
self.log.debug('client ' + authorized ? 'authorized' : 'unauthorized');
|
|
fn(err, authorized);
|
|
});
|
|
} else {
|
|
this.log.debug('client authorized');
|
|
fn(null, true);
|
|
}
|
|
|
|
return this;
|
|
};
|
|
|
|
/**
|
|
* Retrieves the transports adviced to the user.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.transports = function (data) {
|
|
var transp = this.get('transports')
|
|
, ret = [];
|
|
|
|
for (var i = 0, l = transp.length; i < l; i++) {
|
|
var transport = transp[i];
|
|
|
|
if (transport) {
|
|
if (!transport.checkClient || transport.checkClient(data)) {
|
|
ret.push(transport);
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
};
|
|
|
|
/**
|
|
* Checks whether a request is a socket.io one.
|
|
*
|
|
* @return {Object} a client request data object or `false`
|
|
* @api private
|
|
*/
|
|
|
|
var regexp = /^\/([^\/]+)\/?([^\/]+)?\/?([^\/]+)?\/?$/
|
|
|
|
Manager.prototype.checkRequest = function (req) {
|
|
var resource = this.get('resource');
|
|
|
|
var match;
|
|
if (typeof resource === 'string') {
|
|
match = req.url.substr(0, resource.length);
|
|
if (match !== resource) match = null;
|
|
} else {
|
|
match = resource.exec(req.url);
|
|
if (match) match = match[0];
|
|
}
|
|
|
|
if (match) {
|
|
var uri = url.parse(req.url.substr(match.length), true)
|
|
, path = uri.pathname || ''
|
|
, pieces = path.match(regexp);
|
|
|
|
// client request data
|
|
var data = {
|
|
query: uri.query || {}
|
|
, headers: req.headers
|
|
, request: req
|
|
, path: path
|
|
};
|
|
|
|
if (pieces) {
|
|
data.protocol = Number(pieces[1]);
|
|
data.transport = pieces[2];
|
|
data.id = pieces[3];
|
|
data.static = !!this.static.has(path);
|
|
};
|
|
|
|
return data;
|
|
}
|
|
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* Declares a socket namespace
|
|
*
|
|
* @api public
|
|
*/
|
|
|
|
Manager.prototype.of = function (nsp) {
|
|
if (this.namespaces[nsp]) {
|
|
return this.namespaces[nsp];
|
|
}
|
|
|
|
return this.namespaces[nsp] = new SocketNamespace(this, nsp);
|
|
};
|
|
|
|
/**
|
|
* Perform garbage collection on long living objects and properties that cannot
|
|
* be removed automatically.
|
|
*
|
|
* @api private
|
|
*/
|
|
|
|
Manager.prototype.garbageCollection = function () {
|
|
// clean up unused handshakes
|
|
var ids = Object.keys(this.handshaken)
|
|
, i = ids.length
|
|
, now = Date.now()
|
|
, handshake;
|
|
|
|
while (i--) {
|
|
handshake = this.handshaken[ids[i]];
|
|
|
|
if ('issued' in handshake && (now - handshake.issued) >= 3E4) {
|
|
this.onDisconnect(ids[i]);
|
|
}
|
|
}
|
|
};
|