523 lines
13 KiB
JavaScript
523 lines
13 KiB
JavaScript
'use strict';
|
||
|
||
/**
|
||
* Module dependencies.
|
||
*/
|
||
|
||
var http = require('http');
|
||
var read = require('fs').readFileSync;
|
||
var path = require('path');
|
||
var exists = require('fs').existsSync;
|
||
var engine = require('engine.io');
|
||
var clientVersion = require('socket.io-client/package.json').version;
|
||
var Client = require('./client');
|
||
var Emitter = require('events').EventEmitter;
|
||
var Namespace = require('./namespace');
|
||
var ParentNamespace = require('./parent-namespace');
|
||
var Adapter = require('socket.io-adapter');
|
||
var parser = require('socket.io-parser');
|
||
var debug = require('debug')('socket.io:server');
|
||
var url = require('url');
|
||
|
||
/**
|
||
* Module exports.
|
||
*/
|
||
|
||
module.exports = Server;
|
||
|
||
/**
|
||
* Socket.IO client source.
|
||
*/
|
||
|
||
var clientSource = undefined;
|
||
var clientSourceMap = undefined;
|
||
|
||
/**
|
||
* Server constructor.
|
||
*
|
||
* @param {http.Server|Number|Object} srv http server, port or options
|
||
* @param {Object} [opts]
|
||
* @api public
|
||
*/
|
||
|
||
function Server(srv, opts){
|
||
if (!(this instanceof Server)) return new Server(srv, opts);
|
||
if ('object' == typeof srv && srv instanceof Object && !srv.listen) {
|
||
opts = srv;
|
||
srv = null;
|
||
}
|
||
opts = opts || {};
|
||
this.nsps = {};
|
||
this.parentNsps = new Map();
|
||
this.path(opts.path || '/socket.io');
|
||
this.serveClient(false !== opts.serveClient);
|
||
this.parser = opts.parser || parser;
|
||
this.encoder = new this.parser.Encoder();
|
||
this.adapter(opts.adapter || Adapter);
|
||
this.origins(opts.origins || '*:*');
|
||
this.sockets = this.of('/');
|
||
if (srv) this.attach(srv, opts);
|
||
}
|
||
|
||
/**
|
||
* Server request verification function, that checks for allowed origins
|
||
*
|
||
* @param {http.IncomingMessage} req request
|
||
* @param {Function} fn callback to be called with the result: `fn(err, success)`
|
||
*/
|
||
|
||
Server.prototype.checkRequest = function(req, fn) {
|
||
var origin = req.headers.origin || req.headers.referer;
|
||
|
||
// file:// URLs produce a null Origin which can't be authorized via echo-back
|
||
if ('null' == origin || null == origin) origin = '*';
|
||
|
||
if (!!origin && typeof(this._origins) == 'function') return this._origins(origin, fn);
|
||
if (this._origins.indexOf('*:*') !== -1) return fn(null, true);
|
||
if (origin) {
|
||
try {
|
||
var parts = url.parse(origin);
|
||
var defaultPort = 'https:' == parts.protocol ? 443 : 80;
|
||
parts.port = parts.port != null
|
||
? parts.port
|
||
: defaultPort;
|
||
var ok =
|
||
~this._origins.indexOf(parts.protocol + '//' + parts.hostname + ':' + parts.port) ||
|
||
~this._origins.indexOf(parts.hostname + ':' + parts.port) ||
|
||
~this._origins.indexOf(parts.hostname + ':*') ||
|
||
~this._origins.indexOf('*:' + parts.port);
|
||
debug('origin %s is %svalid', origin, !!ok ? '' : 'not ');
|
||
return fn(null, !!ok);
|
||
} catch (ex) {
|
||
}
|
||
}
|
||
fn(null, false);
|
||
};
|
||
|
||
/**
|
||
* Sets/gets whether client code is being served.
|
||
*
|
||
* @param {Boolean} v whether to serve client code
|
||
* @return {Server|Boolean} self when setting or value when getting
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.serveClient = function(v){
|
||
if (!arguments.length) return this._serveClient;
|
||
this._serveClient = v;
|
||
var resolvePath = function(file){
|
||
var filepath = path.resolve(__dirname, './../../', file);
|
||
if (exists(filepath)) {
|
||
return filepath;
|
||
}
|
||
return require.resolve(file);
|
||
};
|
||
if (v && !clientSource) {
|
||
clientSource = read(resolvePath( 'socket.io-client/dist/socket.io.js'), 'utf-8');
|
||
try {
|
||
clientSourceMap = read(resolvePath( 'socket.io-client/dist/socket.io.js.map'), 'utf-8');
|
||
} catch(err) {
|
||
debug('could not load sourcemap file');
|
||
}
|
||
}
|
||
return this;
|
||
};
|
||
|
||
/**
|
||
* Old settings for backwards compatibility
|
||
*/
|
||
|
||
var oldSettings = {
|
||
"transports": "transports",
|
||
"heartbeat timeout": "pingTimeout",
|
||
"heartbeat interval": "pingInterval",
|
||
"destroy buffer size": "maxHttpBufferSize"
|
||
};
|
||
|
||
/**
|
||
* Backwards compatibility.
|
||
*
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.set = function(key, val){
|
||
if ('authorization' == key && val) {
|
||
this.use(function(socket, next) {
|
||
val(socket.request, function(err, authorized) {
|
||
if (err) return next(new Error(err));
|
||
if (!authorized) return next(new Error('Not authorized'));
|
||
next();
|
||
});
|
||
});
|
||
} else if ('origins' == key && val) {
|
||
this.origins(val);
|
||
} else if ('resource' == key) {
|
||
this.path(val);
|
||
} else if (oldSettings[key] && this.eio[oldSettings[key]]) {
|
||
this.eio[oldSettings[key]] = val;
|
||
} else {
|
||
console.error('Option %s is not valid. Please refer to the README.', key);
|
||
}
|
||
|
||
return this;
|
||
};
|
||
|
||
/**
|
||
* Executes the middleware for an incoming namespace not already created on the server.
|
||
*
|
||
* @param {String} name name of incoming namespace
|
||
* @param {Object} query the query parameters
|
||
* @param {Function} fn callback
|
||
* @api private
|
||
*/
|
||
|
||
Server.prototype.checkNamespace = function(name, query, fn){
|
||
if (this.parentNsps.size === 0) return fn(false);
|
||
|
||
const keysIterator = this.parentNsps.keys();
|
||
|
||
const run = () => {
|
||
let nextFn = keysIterator.next();
|
||
if (nextFn.done) {
|
||
return fn(false);
|
||
}
|
||
nextFn.value(name, query, (err, allow) => {
|
||
if (err || !allow) {
|
||
run();
|
||
} else {
|
||
fn(this.parentNsps.get(nextFn.value).createChild(name));
|
||
}
|
||
});
|
||
};
|
||
|
||
run();
|
||
};
|
||
|
||
/**
|
||
* Sets the client serving path.
|
||
*
|
||
* @param {String} v pathname
|
||
* @return {Server|String} self when setting or value when getting
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.path = function(v){
|
||
if (!arguments.length) return this._path;
|
||
this._path = v.replace(/\/$/, '');
|
||
return this;
|
||
};
|
||
|
||
/**
|
||
* Sets the adapter for rooms.
|
||
*
|
||
* @param {Adapter} v pathname
|
||
* @return {Server|Adapter} self when setting or value when getting
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.adapter = function(v){
|
||
if (!arguments.length) return this._adapter;
|
||
this._adapter = v;
|
||
for (var i in this.nsps) {
|
||
if (this.nsps.hasOwnProperty(i)) {
|
||
this.nsps[i].initAdapter();
|
||
}
|
||
}
|
||
return this;
|
||
};
|
||
|
||
/**
|
||
* Sets the allowed origins for requests.
|
||
*
|
||
* @param {String|String[]} v origins
|
||
* @return {Server|Adapter} self when setting or value when getting
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.origins = function(v){
|
||
if (!arguments.length) return this._origins;
|
||
|
||
this._origins = v;
|
||
return this;
|
||
};
|
||
|
||
/**
|
||
* Attaches socket.io to a server or port.
|
||
*
|
||
* @param {http.Server|Number} server or port
|
||
* @param {Object} options passed to engine.io
|
||
* @return {Server} self
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.listen =
|
||
Server.prototype.attach = function(srv, opts){
|
||
if ('function' == typeof srv) {
|
||
var msg = 'You are trying to attach socket.io to an express ' +
|
||
'request handler function. Please pass a http.Server instance.';
|
||
throw new Error(msg);
|
||
}
|
||
|
||
// handle a port as a string
|
||
if (Number(srv) == srv) {
|
||
srv = Number(srv);
|
||
}
|
||
|
||
if ('number' == typeof srv) {
|
||
debug('creating http server and binding to %d', srv);
|
||
var port = srv;
|
||
srv = http.Server(function(req, res){
|
||
res.writeHead(404);
|
||
res.end();
|
||
});
|
||
srv.listen(port);
|
||
|
||
}
|
||
|
||
// set engine.io path to `/socket.io`
|
||
opts = opts || {};
|
||
opts.path = opts.path || this.path();
|
||
// set origins verification
|
||
opts.allowRequest = opts.allowRequest || this.checkRequest.bind(this);
|
||
|
||
if (this.sockets.fns.length > 0) {
|
||
this.initEngine(srv, opts);
|
||
return this;
|
||
}
|
||
|
||
var self = this;
|
||
var connectPacket = { type: parser.CONNECT, nsp: '/' };
|
||
this.encoder.encode(connectPacket, function (encodedPacket){
|
||
// the CONNECT packet will be merged with Engine.IO handshake,
|
||
// to reduce the number of round trips
|
||
opts.initialPacket = encodedPacket;
|
||
|
||
self.initEngine(srv, opts);
|
||
});
|
||
return this;
|
||
};
|
||
|
||
/**
|
||
* Initialize engine
|
||
*
|
||
* @param {Object} options passed to engine.io
|
||
* @api private
|
||
*/
|
||
|
||
Server.prototype.initEngine = function(srv, opts){
|
||
// initialize engine
|
||
debug('creating engine.io instance with opts %j', opts);
|
||
this.eio = engine.attach(srv, opts);
|
||
|
||
// attach static file serving
|
||
if (this._serveClient) this.attachServe(srv);
|
||
|
||
// Export http server
|
||
this.httpServer = srv;
|
||
|
||
// bind to engine events
|
||
this.bind(this.eio);
|
||
};
|
||
|
||
/**
|
||
* Attaches the static file serving.
|
||
*
|
||
* @param {Function|http.Server} srv http server
|
||
* @api private
|
||
*/
|
||
|
||
Server.prototype.attachServe = function(srv){
|
||
debug('attaching client serving req handler');
|
||
var url = this._path + '/socket.io.js';
|
||
var urlMap = this._path + '/socket.io.js.map';
|
||
var evs = srv.listeners('request').slice(0);
|
||
var self = this;
|
||
srv.removeAllListeners('request');
|
||
srv.on('request', function(req, res) {
|
||
if (0 === req.url.indexOf(urlMap)) {
|
||
self.serveMap(req, res);
|
||
} else if (0 === req.url.indexOf(url)) {
|
||
self.serve(req, res);
|
||
} else {
|
||
for (var i = 0; i < evs.length; i++) {
|
||
evs[i].call(srv, req, res);
|
||
}
|
||
}
|
||
});
|
||
};
|
||
|
||
/**
|
||
* Handles a request serving `/socket.io.js`
|
||
*
|
||
* @param {http.Request} req
|
||
* @param {http.Response} res
|
||
* @api private
|
||
*/
|
||
|
||
Server.prototype.serve = function(req, res){
|
||
// Per the standard, ETags must be quoted:
|
||
// https://tools.ietf.org/html/rfc7232#section-2.3
|
||
var expectedEtag = '"' + clientVersion + '"';
|
||
|
||
var etag = req.headers['if-none-match'];
|
||
if (etag) {
|
||
if (expectedEtag == etag) {
|
||
debug('serve client 304');
|
||
res.writeHead(304);
|
||
res.end();
|
||
return;
|
||
}
|
||
}
|
||
|
||
debug('serve client source');
|
||
res.setHeader('Content-Type', 'application/javascript');
|
||
res.setHeader('ETag', expectedEtag);
|
||
res.writeHead(200);
|
||
res.end(clientSource);
|
||
};
|
||
|
||
/**
|
||
* Handles a request serving `/socket.io.js.map`
|
||
*
|
||
* @param {http.Request} req
|
||
* @param {http.Response} res
|
||
* @api private
|
||
*/
|
||
|
||
Server.prototype.serveMap = function(req, res){
|
||
// Per the standard, ETags must be quoted:
|
||
// https://tools.ietf.org/html/rfc7232#section-2.3
|
||
var expectedEtag = '"' + clientVersion + '"';
|
||
|
||
var etag = req.headers['if-none-match'];
|
||
if (etag) {
|
||
if (expectedEtag == etag) {
|
||
debug('serve client 304');
|
||
res.writeHead(304);
|
||
res.end();
|
||
return;
|
||
}
|
||
}
|
||
|
||
debug('serve client sourcemap');
|
||
res.setHeader('Content-Type', 'application/json');
|
||
res.setHeader('ETag', expectedEtag);
|
||
res.writeHead(200);
|
||
res.end(clientSourceMap);
|
||
};
|
||
|
||
/**
|
||
* Binds socket.io to an engine.io instance.
|
||
*
|
||
* @param {engine.Server} engine engine.io (or compatible) server
|
||
* @return {Server} self
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.bind = function(engine){
|
||
this.engine = engine;
|
||
this.engine.on('connection', this.onconnection.bind(this));
|
||
return this;
|
||
};
|
||
|
||
/**
|
||
* Called with each incoming transport connection.
|
||
*
|
||
* @param {engine.Socket} conn
|
||
* @return {Server} self
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.onconnection = function(conn){
|
||
debug('incoming connection with id %s', conn.id);
|
||
var client = new Client(this, conn);
|
||
client.connect('/');
|
||
return this;
|
||
};
|
||
|
||
/**
|
||
* Looks up a namespace.
|
||
*
|
||
* @param {String|RegExp|Function} name nsp name
|
||
* @param {Function} [fn] optional, nsp `connection` ev handler
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.of = function(name, fn){
|
||
if (typeof name === 'function' || name instanceof RegExp) {
|
||
const parentNsp = new ParentNamespace(this);
|
||
debug('initializing parent namespace %s', parentNsp.name);
|
||
if (typeof name === 'function') {
|
||
this.parentNsps.set(name, parentNsp);
|
||
} else {
|
||
this.parentNsps.set((nsp, conn, next) => next(null, name.test(nsp)), parentNsp);
|
||
}
|
||
if (fn) parentNsp.on('connect', fn);
|
||
return parentNsp;
|
||
}
|
||
|
||
if (String(name)[0] !== '/') name = '/' + name;
|
||
|
||
var nsp = this.nsps[name];
|
||
if (!nsp) {
|
||
debug('initializing namespace %s', name);
|
||
nsp = new Namespace(this, name);
|
||
this.nsps[name] = nsp;
|
||
}
|
||
if (fn) nsp.on('connect', fn);
|
||
return nsp;
|
||
};
|
||
|
||
/**
|
||
* Closes server connection
|
||
*
|
||
* @param {Function} [fn] optional, called as `fn([err])` on error OR all conns closed
|
||
* @api public
|
||
*/
|
||
|
||
Server.prototype.close = function(fn){
|
||
for (var id in this.nsps['/'].sockets) {
|
||
if (this.nsps['/'].sockets.hasOwnProperty(id)) {
|
||
this.nsps['/'].sockets[id].onclose();
|
||
}
|
||
}
|
||
|
||
this.engine.close();
|
||
|
||
if (this.httpServer) {
|
||
this.httpServer.close(fn);
|
||
} else {
|
||
fn && fn();
|
||
}
|
||
};
|
||
|
||
/**
|
||
* Expose main namespace (/).
|
||
*/
|
||
|
||
var emitterMethods = Object.keys(Emitter.prototype).filter(function(key){
|
||
return typeof Emitter.prototype[key] === 'function';
|
||
});
|
||
|
||
emitterMethods.concat(['to', 'in', 'use', 'send', 'write', 'clients', 'compress', 'binary']).forEach(function(fn){
|
||
Server.prototype[fn] = function(){
|
||
return this.sockets[fn].apply(this.sockets, arguments);
|
||
};
|
||
});
|
||
|
||
Namespace.flags.forEach(function(flag){
|
||
Object.defineProperty(Server.prototype, flag, {
|
||
get: function() {
|
||
this.sockets.flags = this.sockets.flags || {};
|
||
this.sockets.flags[flag] = true;
|
||
return this;
|
||
}
|
||
});
|
||
});
|
||
|
||
/**
|
||
* BC with `io.listen`
|
||
*/
|
||
|
||
Server.listen = Server;
|