index.js (1795B)
1 var http = require('http'); 2 var express = require('express'); 3 var fs = require('fs'); 4 var io = require('socket.io'); 5 var crypto = require('crypto'); 6 7 var app = express(); 8 var staticDir = express.static; 9 var server = http.createServer(app); 10 11 io = io(server); 12 13 var opts = { 14 port: process.env.PORT || 1948, 15 baseDir : __dirname + '/../../' 16 }; 17 18 io.on( 'connection', function( socket ) { 19 socket.on('multiplex-statechanged', function(data) { 20 if (typeof data.secret == 'undefined' || data.secret == null || data.secret === '') return; 21 if (createHash(data.secret) === data.socketId) { 22 data.secret = null; 23 socket.broadcast.emit(data.socketId, data); 24 }; 25 }); 26 }); 27 28 [ 'css', 'js', 'plugin', 'lib' ].forEach(function(dir) { 29 app.use('/' + dir, staticDir(opts.baseDir + dir)); 30 }); 31 32 app.get("/", function(req, res) { 33 res.writeHead(200, {'Content-Type': 'text/html'}); 34 35 var stream = fs.createReadStream(opts.baseDir + '/index.html'); 36 stream.on('error', function( error ) { 37 res.write('<style>body{font-family: sans-serif;}</style><h2>reveal.js multiplex server.</h2><a href="/token">Generate token</a>'); 38 res.end(); 39 }); 40 stream.on('readable', function() { 41 stream.pipe(res); 42 }); 43 }); 44 45 app.get("/token", function(req,res) { 46 var ts = new Date().getTime(); 47 var rand = Math.floor(Math.random()*9999999); 48 var secret = ts.toString() + rand.toString(); 49 res.send({secret: secret, socketId: createHash(secret)}); 50 }); 51 52 var createHash = function(secret) { 53 var cipher = crypto.createCipher('blowfish', secret); 54 return(cipher.final('hex')); 55 }; 56 57 // Actually listen 58 server.listen( opts.port || null ); 59 60 var brown = '\033[33m', 61 green = '\033[32m', 62 reset = '\033[0m'; 63 64 console.log( brown + "reveal.js:" + reset + " Multiplex running on port " + green + opts.port + reset );