metamaps--metamaps/realtime/node_modules/socket.io/lib/manager.js

1026 lines
22 KiB
JavaScript

/*!
* socket.io-node
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
/**
* Module dependencies.
*/
var fs = require('fs')
, url = require('url')
, tty = require('tty')
, crypto = require('crypto')
, util = require('./util')
, store = require('./store')
, client = require('socket.io-client')
, transports = require('./transports')
, Logger = require('./logger')
, Socket = require('./socket')
, MemoryStore = require('./stores/memory')
, SocketNamespace = require('./namespace')
, Static = require('./static')
, EventEmitter = process.EventEmitter;
/**
* Export the constructor.
*/
exports = module.exports = Manager;
/**
* Default transports.
*/
var defaultTransports = exports.defaultTransports = [
'websocket'
, 'htmlfile'
, 'xhr-polling'
, 'jsonp-polling'
];
/**
* Inherited defaults.
*/
var parent = module.parent.exports
, protocol = parent.protocol
, jsonpolling_re = /^\d+$/;
/**
* Manager constructor.
*
* @param {HTTPServer} server
* @param {Object} options, optional
* @api public
*/
function Manager (server, options) {
this.server = server;
this.namespaces = {};
this.sockets = this.of('');
this.settings = {
origins: '*:*'
, log: true
, store: new MemoryStore
, logger: new Logger
, static: new Static(this)
, heartbeats: true
, resource: '/socket.io'
, transports: defaultTransports
, authorization: false
, blacklist: ['disconnect']
, 'log level': 3
, 'log colors': tty.isatty(process.stdout.fd)
, 'close timeout': 60
, 'heartbeat interval': 25
, 'heartbeat timeout': 60
, 'polling duration': 20
, 'flash policy server': true
, 'flash policy port': 10843
, 'destroy upgrade': true
, 'destroy buffer size': 10E7
, 'browser client': true
, 'browser client cache': true
, 'browser client minification': false
, 'browser client etag': false
, 'browser client expires': 315360000
, 'browser client gzip': false
, 'browser client handler': false
, 'client store expiration': 15
, 'match origin protocol': false
};
for (var i in options) {
if (options.hasOwnProperty(i)) {
this.settings[i] = options[i];
}
}
var self = this;
// default error handler
server.on('error', function(err) {
self.log.warn('error raised: ' + err);
});
this.initStore();
this.on('set:store', function() {
self.initStore();
});
// reset listeners
this.oldListeners = server.listeners('request').splice(0);
server.removeAllListeners('request');
server.on('request', function (req, res) {
self.handleRequest(req, res);
});
server.on('upgrade', function (req, socket, head) {
self.handleUpgrade(req, socket, head);
});
server.on('close', function () {
clearInterval(self.gc);
});
server.once('listening', function () {
self.gc = setInterval(self.garbageCollection.bind(self), 10000);
});
for (var i in transports) {
if (transports.hasOwnProperty(i)) {
if (transports[i].init) {
transports[i].init(this);
}
}
}
// forward-compatibility with 1.0
var self = this;
this.sockets.on('connection', function (conn) {
self.emit('connection', conn);
});
this.sequenceNumber = Date.now() | 0;
this.log.info('socket.io started');
};
Manager.prototype.__proto__ = EventEmitter.prototype
/**
* Store accessor shortcut.
*
* @api public
*/
Manager.prototype.__defineGetter__('store', function () {
var store = this.get('store');
store.manager = this;
return store;
});
/**
* Logger accessor.
*
* @api public
*/
Manager.prototype.__defineGetter__('log', function () {
var logger = this.get('logger');
logger.level = this.get('log level') || -1;
logger.colors = this.get('log colors');
logger.enabled = this.enabled('log');
return logger;
});
/**
* Static accessor.
*
* @api public
*/
Manager.prototype.__defineGetter__('static', function () {
return this.get('static');
});
/**
* Get settings.
*
* @api public
*/
Manager.prototype.get = function (key) {
return this.settings[key];
};
/**
* Set settings
*
* @api public
*/
Manager.prototype.set = function (key, value) {
if (arguments.length == 1) return this.get(key);
this.settings[key] = value;
this.emit('set:' + key, this.settings[key], key);
return this;
};
/**
* Enable a setting
*
* @api public
*/
Manager.prototype.enable = function (key) {
this.settings[key] = true;
this.emit('set:' + key, this.settings[key], key);
return this;
};
/**
* Disable a setting
*
* @api public
*/
Manager.prototype.disable = function (key) {
this.settings[key] = false;
this.emit('set:' + key, this.settings[key], key);
return this;
};
/**
* Checks if a setting is enabled
*
* @api public
*/
Manager.prototype.enabled = function (key) {
return !!this.settings[key];
};
/**
* Checks if a setting is disabled
*
* @api public
*/
Manager.prototype.disabled = function (key) {
return !this.settings[key];
};
/**
* Configure callbacks.
*
* @api public
*/
Manager.prototype.configure = function (env, fn) {
if ('function' == typeof env) {
env.call(this);
} else if (env == (process.env.NODE_ENV || 'development')) {
fn.call(this);
}
return this;
};
/**
* Initializes everything related to the message dispatcher.
*
* @api private
*/
Manager.prototype.initStore = function () {
this.handshaken = {};
this.connected = {};
this.open = {};
this.closed = {};
this.rooms = {};
this.roomClients = {};
var self = this;
this.store.subscribe('handshake', function (id, data) {
self.onHandshake(id, data);
});
this.store.subscribe('connect', function (id) {
self.onConnect(id);
});
this.store.subscribe('open', function (id) {
self.onOpen(id);
});
this.store.subscribe('join', function (id, room) {
self.onJoin(id, room);
});
this.store.subscribe('leave', function (id, room) {
self.onLeave(id, room);
});
this.store.subscribe('close', function (id) {
self.onClose(id);
});
this.store.subscribe('dispatch', function (room, packet, volatile, exceptions) {
self.onDispatch(room, packet, volatile, exceptions);
});
this.store.subscribe('disconnect', function (id) {
self.onDisconnect(id);
});
};
/**
* Called when a client handshakes.
*
* @param text
*/
Manager.prototype.onHandshake = function (id, data) {
this.handshaken[id] = data;
};
/**
* Called when a client connects (ie: transport first opens)
*
* @api private
*/
Manager.prototype.onConnect = function (id) {
this.connected[id] = true;
};
/**
* Called when a client opens a request in a different node.
*
* @api private
*/
Manager.prototype.onOpen = function (id) {
this.open[id] = true;
if (this.closed[id]) {
var self = this;
this.store.unsubscribe('dispatch:' + id, function () {
var transport = self.transports[id];
if (self.closed[id] && self.closed[id].length && transport) {
// if we have buffered messages that accumulate between calling
// onOpen an this async callback, send them if the transport is
// still open, otherwise leave them buffered
if (transport.open) {
transport.payload(self.closed[id]);
self.closed[id] = [];
}
}
});
}
// clear the current transport
if (this.transports[id]) {
this.transports[id].discard();
this.transports[id] = null;
}
};
/**
* Called when a message is sent to a namespace and/or room.
*
* @api private
*/
Manager.prototype.onDispatch = function (room, packet, volatile, exceptions) {
if (this.rooms[room]) {
for (var i = 0, l = this.rooms[room].length; i < l; i++) {
var id = this.rooms[room][i];
if (!~exceptions.indexOf(id)) {
if (this.transports[id] && this.transports[id].open) {
this.transports[id].onDispatch(packet, volatile);
} else if (!volatile) {
this.onClientDispatch(id, packet);
}
}
}
}
};
/**
* Called when a client joins a nsp / room.
*
* @api private
*/
Manager.prototype.onJoin = function (id, name) {
if (!this.roomClients[id]) {
this.roomClients[id] = {};
}
if (!this.rooms[name]) {
this.rooms[name] = [];
}
if (!~this.rooms[name].indexOf(id)) {
this.rooms[name].push(id);
this.roomClients[id][name] = true;
}
};
/**
* Called when a client leaves a nsp / room.
*
* @param private
*/
Manager.prototype.onLeave = function (id, room) {
if (this.rooms[room]) {
var index = this.rooms[room].indexOf(id);
if (index >= 0) {
this.rooms[room].splice(index, 1);
}
if (!this.rooms[room].length) {
delete this.rooms[room];
}
if (this.roomClients[id]) {
delete this.roomClients[id][room];
}
}
};
/**
* Called when a client closes a request in different node.
*
* @api private
*/
Manager.prototype.onClose = function (id) {
if (this.open[id]) {
delete this.open[id];
}
this.closed[id] = [];
var self = this;
this.store.subscribe('dispatch:' + id, function (packet, volatile) {
if (!volatile) {
self.onClientDispatch(id, packet);
}
});
};
/**
* Dispatches a message for a closed client.
*
* @api private
*/
Manager.prototype.onClientDispatch = function (id, packet) {
if (this.closed[id]) {
this.closed[id].push(packet);
}
};
/**
* Receives a message for a client.
*
* @api private
*/
Manager.prototype.onClientMessage = function (id, packet) {
if (this.namespaces[packet.endpoint]) {
this.namespaces[packet.endpoint].handlePacket(id, packet);
}
};
/**
* Fired when a client disconnects (not triggered).
*
* @api private
*/
Manager.prototype.onClientDisconnect = function (id, reason) {
for (var name in this.namespaces) {
if (this.namespaces.hasOwnProperty(name)) {
this.namespaces[name].handleDisconnect(id, reason, typeof this.roomClients[id] !== 'undefined' &&
typeof this.roomClients[id][name] !== 'undefined');
}
}
this.onDisconnect(id);
};
/**
* Called when a client disconnects.
*
* @param text
*/
Manager.prototype.onDisconnect = function (id, local) {
delete this.handshaken[id];
if (this.open[id]) {
delete this.open[id];
}
if (this.connected[id]) {
delete this.connected[id];
}
if (this.transports[id]) {
this.transports[id].discard();
delete this.transports[id];
}
if (this.closed[id]) {
delete this.closed[id];
}
if (this.roomClients[id]) {
for (var room in this.roomClients[id]) {
if (this.roomClients[id].hasOwnProperty(room)) {
this.onLeave(id, room);
}
}
delete this.roomClients[id]
}
this.store.destroyClient(id, this.get('client store expiration'));
this.store.unsubscribe('dispatch:' + id);
if (local) {
this.store.unsubscribe('message:' + id);
this.store.unsubscribe('disconnect:' + id);
}
};
/**
* Handles an HTTP request.
*
* @api private
*/
Manager.prototype.handleRequest = function (req, res) {
var data = this.checkRequest(req);
if (!data) {
for (var i = 0, l = this.oldListeners.length; i < l; i++) {
this.oldListeners[i].call(this.server, req, res);
}
return;
}
if (data.static || !data.transport && !data.protocol) {
if (data.static && this.enabled('browser client')) {
this.static.write(data.path, req, res);
} else {
res.writeHead(200);
res.end('Welcome to socket.io.');
this.log.info('unhandled socket.io url');
}
return;
}
if (data.protocol != protocol) {
res.writeHead(500);
res.end('Protocol version not supported.');
this.log.info('client protocol version unsupported');
} else {
if (data.id) {
this.handleHTTPRequest(data, req, res);
} else {
this.handleHandshake(data, req, res);
}
}
};
/**
* Handles an HTTP Upgrade.
*
* @api private
*/
Manager.prototype.handleUpgrade = function (req, socket, head) {
var data = this.checkRequest(req)
, self = this;
if (!data) {
if (this.enabled('destroy upgrade')) {
socket.end();
this.log.debug('destroying non-socket.io upgrade');
}
return;
}
req.head = head;
this.handleClient(data, req);
};
/**
* Handles a normal handshaken HTTP request (eg: long-polling)
*
* @api private
*/
Manager.prototype.handleHTTPRequest = function (data, req, res) {
req.res = res;
this.handleClient(data, req);
};
/**
* 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]);
}
}
};