From b60df56157ee1fd0bd4938799bac05a62fda91a1 Mon Sep 17 00:00:00 2001 From: lookshe Date: Sat, 14 Mar 2015 20:45:20 +0100 Subject: initial commit from working version --- .../node_modules/ws/lib/WebSocketServer.js | 465 +++++++++++++++++++++ 1 file changed, 465 insertions(+) create mode 100644 signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/WebSocketServer.js (limited to 'signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/WebSocketServer.js') diff --git a/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/WebSocketServer.js b/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/WebSocketServer.js new file mode 100644 index 0000000..5cbd195 --- /dev/null +++ b/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/WebSocketServer.js @@ -0,0 +1,465 @@ +/*! + * ws: a node.js websocket client + * Copyright(c) 2011 Einar Otto Stangvik + * MIT Licensed + */ + +var util = require('util') + , events = require('events') + , http = require('http') + , crypto = require('crypto') + , Options = require('options') + , WebSocket = require('./WebSocket') + , tls = require('tls') + , url = require('url'); + +/** + * WebSocket Server implementation + */ + +function WebSocketServer(options, callback) { + options = new Options({ + host: '0.0.0.0', + port: null, + server: null, + verifyClient: null, + handleProtocols: null, + path: null, + noServer: false, + disableHixie: false, + clientTracking: true + }).merge(options); + + if (!options.isDefinedAndNonNull('port') && !options.isDefinedAndNonNull('server') && !options.value.noServer) { + throw new TypeError('`port` or a `server` must be provided'); + } + + var self = this; + + if (options.isDefinedAndNonNull('port')) { + this._server = http.createServer(function (req, res) { + res.writeHead(200, {'Content-Type': 'text/plain'}); + res.end('Not implemented'); + }); + this._server.listen(options.value.port, options.value.host, callback); + this._closeServer = function() { if (self._server) self._server.close(); }; + } + else if (options.value.server) { + this._server = options.value.server; + if (options.value.path) { + // take note of the path, to avoid collisions when multiple websocket servers are + // listening on the same http server + if (this._server._webSocketPaths && options.value.server._webSocketPaths[options.value.path]) { + throw new Error('two instances of WebSocketServer cannot listen on the same http server path'); + } + if (typeof this._server._webSocketPaths !== 'object') { + this._server._webSocketPaths = {}; + } + this._server._webSocketPaths[options.value.path] = 1; + } + } + if (this._server) this._server.once('listening', function() { self.emit('listening'); }); + + if (typeof this._server != 'undefined') { + this._server.on('error', function(error) { + self.emit('error', error) + }); + this._server.on('upgrade', function(req, socket, upgradeHead) { + //copy upgradeHead to avoid retention of large slab buffers used in node core + var head = new Buffer(upgradeHead.length); + upgradeHead.copy(head); + + self.handleUpgrade(req, socket, head, function(client) { + self.emit('connection'+req.url, client); + self.emit('connection', client); + }); + }); + } + + this.options = options.value; + this.path = options.value.path; + this.clients = []; +} + +/** + * Inherits from EventEmitter. + */ + +util.inherits(WebSocketServer, events.EventEmitter); + +/** + * Immediately shuts down the connection. + * + * @api public + */ + +WebSocketServer.prototype.close = function() { + // terminate all associated clients + var error = null; + try { + for (var i = 0, l = this.clients.length; i < l; ++i) { + this.clients[i].terminate(); + } + } + catch (e) { + error = e; + } + + // remove path descriptor, if any + if (this.path && this._server._webSocketPaths) { + delete this._server._webSocketPaths[this.path]; + if (Object.keys(this._server._webSocketPaths).length == 0) { + delete this._server._webSocketPaths; + } + } + + // close the http server if it was internally created + try { + if (typeof this._closeServer !== 'undefined') { + this._closeServer(); + } + } + finally { + delete this._server; + } + if (error) throw error; +} + +/** + * Handle a HTTP Upgrade request. + * + * @api public + */ + +WebSocketServer.prototype.handleUpgrade = function(req, socket, upgradeHead, cb) { + // check for wrong path + if (this.options.path) { + var u = url.parse(req.url); + if (u && u.pathname !== this.options.path) return; + } + + if (typeof req.headers.upgrade === 'undefined' || req.headers.upgrade.toLowerCase() !== 'websocket') { + abortConnection(socket, 400, 'Bad Request'); + return; + } + + if (req.headers['sec-websocket-key1']) handleHixieUpgrade.apply(this, arguments); + else handleHybiUpgrade.apply(this, arguments); +} + +module.exports = WebSocketServer; + +/** + * Entirely private apis, + * which may or may not be bound to a sepcific WebSocket instance. + */ + +function handleHybiUpgrade(req, socket, upgradeHead, cb) { + // handle premature socket errors + var errorHandler = function() { + try { socket.destroy(); } catch (e) {} + } + socket.on('error', errorHandler); + + // verify key presence + if (!req.headers['sec-websocket-key']) { + abortConnection(socket, 400, 'Bad Request'); + return; + } + + // verify version + var version = parseInt(req.headers['sec-websocket-version']); + if ([8, 13].indexOf(version) === -1) { + abortConnection(socket, 400, 'Bad Request'); + return; + } + + // verify protocol + var protocols = req.headers['sec-websocket-protocol']; + + // verify client + var origin = version < 13 ? + req.headers['sec-websocket-origin'] : + req.headers['origin']; + + // handler to call when the connection sequence completes + var self = this; + var completeHybiUpgrade2 = function(protocol) { + + // calc key + var key = req.headers['sec-websocket-key']; + var shasum = crypto.createHash('sha1'); + shasum.update(key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"); + key = shasum.digest('base64'); + + var headers = [ + 'HTTP/1.1 101 Switching Protocols' + , 'Upgrade: websocket' + , 'Connection: Upgrade' + , 'Sec-WebSocket-Accept: ' + key + ]; + + if (typeof protocol != 'undefined') { + headers.push('Sec-WebSocket-Protocol: ' + protocol); + } + + // allows external modification/inspection of handshake headers + self.emit('headers', headers); + + socket.setTimeout(0); + socket.setNoDelay(true); + try { + socket.write(headers.concat('', '').join('\r\n')); + } + catch (e) { + // if the upgrade write fails, shut the connection down hard + try { socket.destroy(); } catch (e) {} + return; + } + + var client = new WebSocket([req, socket, upgradeHead], { + protocolVersion: version, + protocol: protocol + }); + + if (self.options.clientTracking) { + self.clients.push(client); + client.on('close', function() { + var index = self.clients.indexOf(client); + if (index != -1) { + self.clients.splice(index, 1); + } + }); + } + + // signal upgrade complete + socket.removeListener('error', errorHandler); + cb(client); + } + + // optionally call external protocol selection handler before + // calling completeHybiUpgrade2 + var completeHybiUpgrade1 = function() { + // choose from the sub-protocols + if (typeof self.options.handleProtocols == 'function') { + var protList = (protocols || "").split(/, */); + var callbackCalled = false; + var res = self.options.handleProtocols(protList, function(result, protocol) { + callbackCalled = true; + if (!result) abortConnection(socket, 404, 'Unauthorized') + else completeHybiUpgrade2(protocol); + }); + if (!callbackCalled) { + // the handleProtocols handler never called our callback + abortConnection(socket, 501, 'Could not process protocols'); + } + return; + } else { + if (typeof protocols !== 'undefined') { + completeHybiUpgrade2(protocols.split(/, */)[0]); + } + else { + completeHybiUpgrade2(); + } + } + } + + // optionally call external client verification handler + if (typeof this.options.verifyClient == 'function') { + var info = { + origin: origin, + secure: typeof req.connection.authorized !== 'undefined' || typeof req.connection.encrypted !== 'undefined', + req: req + }; + if (this.options.verifyClient.length == 2) { + this.options.verifyClient(info, function(result, code, name) { + if (typeof code === 'undefined') code = 401; + if (typeof name === 'undefined') name = http.STATUS_CODES[code]; + + if (!result) abortConnection(socket, code, name); + else completeHybiUpgrade1(); + }); + return; + } + else if (!this.options.verifyClient(info)) { + abortConnection(socket, 401, 'Unauthorized'); + return; + } + } + + completeHybiUpgrade1(); +} + +function handleHixieUpgrade(req, socket, upgradeHead, cb) { + // handle premature socket errors + var errorHandler = function() { + try { socket.destroy(); } catch (e) {} + } + socket.on('error', errorHandler); + + // bail if options prevent hixie + if (this.options.disableHixie) { + abortConnection(socket, 401, 'Hixie support disabled'); + return; + } + + // verify key presence + if (!req.headers['sec-websocket-key2']) { + abortConnection(socket, 400, 'Bad Request'); + return; + } + + var origin = req.headers['origin'] + , self = this; + + // setup handshake completion to run after client has been verified + var onClientVerified = function() { + var wshost; + if (!req.headers['x-forwarded-host']) + wshost = req.headers.host; + else + wshost = req.headers['x-forwarded-host']; + var location = ((req.headers['x-forwarded-proto'] === 'https' || socket.encrypted) ? 'wss' : 'ws') + '://' + wshost + req.url + , protocol = req.headers['sec-websocket-protocol']; + + // handshake completion code to run once nonce has been successfully retrieved + var completeHandshake = function(nonce, rest) { + // calculate key + var k1 = req.headers['sec-websocket-key1'] + , k2 = req.headers['sec-websocket-key2'] + , md5 = crypto.createHash('md5'); + + [k1, k2].forEach(function (k) { + var n = parseInt(k.replace(/[^\d]/g, '')) + , spaces = k.replace(/[^ ]/g, '').length; + if (spaces === 0 || n % spaces !== 0){ + abortConnection(socket, 400, 'Bad Request'); + return; + } + n /= spaces; + md5.update(String.fromCharCode( + n >> 24 & 0xFF, + n >> 16 & 0xFF, + n >> 8 & 0xFF, + n & 0xFF)); + }); + md5.update(nonce.toString('binary')); + + var headers = [ + 'HTTP/1.1 101 Switching Protocols' + , 'Upgrade: WebSocket' + , 'Connection: Upgrade' + , 'Sec-WebSocket-Location: ' + location + ]; + if (typeof protocol != 'undefined') headers.push('Sec-WebSocket-Protocol: ' + protocol); + if (typeof origin != 'undefined') headers.push('Sec-WebSocket-Origin: ' + origin); + + socket.setTimeout(0); + socket.setNoDelay(true); + try { + // merge header and hash buffer + var headerBuffer = new Buffer(headers.concat('', '').join('\r\n')); + var hashBuffer = new Buffer(md5.digest('binary'), 'binary'); + var handshakeBuffer = new Buffer(headerBuffer.length + hashBuffer.length); + headerBuffer.copy(handshakeBuffer, 0); + hashBuffer.copy(handshakeBuffer, headerBuffer.length); + + // do a single write, which - upon success - causes a new client websocket to be setup + socket.write(handshakeBuffer, 'binary', function(err) { + if (err) return; // do not create client if an error happens + var client = new WebSocket([req, socket, rest], { + protocolVersion: 'hixie-76', + protocol: protocol + }); + if (self.options.clientTracking) { + self.clients.push(client); + client.on('close', function() { + var index = self.clients.indexOf(client); + if (index != -1) { + self.clients.splice(index, 1); + } + }); + } + + // signal upgrade complete + socket.removeListener('error', errorHandler); + cb(client); + }); + } + catch (e) { + try { socket.destroy(); } catch (e) {} + return; + } + } + + // retrieve nonce + var nonceLength = 8; + if (upgradeHead && upgradeHead.length >= nonceLength) { + var nonce = upgradeHead.slice(0, nonceLength); + var rest = upgradeHead.length > nonceLength ? upgradeHead.slice(nonceLength) : null; + completeHandshake.call(self, nonce, rest); + } + else { + // nonce not present in upgradeHead, so we must wait for enough data + // data to arrive before continuing + var nonce = new Buffer(nonceLength); + upgradeHead.copy(nonce, 0); + var received = upgradeHead.length; + var rest = null; + var handler = function (data) { + var toRead = Math.min(data.length, nonceLength - received); + if (toRead === 0) return; + data.copy(nonce, received, 0, toRead); + received += toRead; + if (received == nonceLength) { + socket.removeListener('data', handler); + if (toRead < data.length) rest = data.slice(toRead); + completeHandshake.call(self, nonce, rest); + } + } + socket.on('data', handler); + } + } + + // verify client + if (typeof this.options.verifyClient == 'function') { + var info = { + origin: origin, + secure: typeof req.connection.authorized !== 'undefined' || typeof req.connection.encrypted !== 'undefined', + req: req + }; + if (this.options.verifyClient.length == 2) { + var self = this; + this.options.verifyClient(info, function(result, code, name) { + if (typeof code === 'undefined') code = 401; + if (typeof name === 'undefined') name = http.STATUS_CODES[code]; + + if (!result) abortConnection(socket, code, name); + else onClientVerified.apply(self); + }); + return; + } + else if (!this.options.verifyClient(info)) { + abortConnection(socket, 401, 'Unauthorized'); + return; + } + } + + // no client verification required + onClientVerified(); +} + +function abortConnection(socket, code, name) { + try { + var response = [ + 'HTTP/1.1 ' + code + ' ' + name, + 'Content-type: text/html' + ]; + socket.write(response.concat('', '').join('\r\n')); + } + catch (e) { /* ignore errors - we've aborted this connection */ } + finally { + // ensure that an early aborted connection is shut down completely + try { socket.destroy(); } catch (e) {} + } +} -- cgit v1.2.3