github.com/mweagle/Sparta@v1.15.0/docs_source/static/presentations/reveal.js-3.9.2/plugin/multiplex/index.js (about)

     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 );