Node server application

The Node server application in this step has two tasks.

-

In a new directory for Session 06 create a file called server.js and add in variables we need for this session.

var static = require('node-static');
var http = require('http');
var file = new(static.Server)();
var app = http.createServer(function (req, res) {
  file.serve(req, res);
}).listen(2013);

var io = require('socket.io').listen(app);

io.sockets.on('connection', function (socket){

        function log(){
                var array = [">>> Message from server: "];
          for (var i = 0; i < arguments.length; i++) {
                array.push(arguments[i]);
          }
            socket.emit('log', array);
        }

        socket.on('message', function (message) {
                log('Got message: ', message);
    // For a real app, should be room only (not broadcast)
                socket.broadcast.emit('message', message);
        });

Next on a create or join we must manage the WebRTC video chat 'rooms', so add the methods to handle this.

        socket.on('create or join', function (room) {
                var numClients = io.sockets.clients(room).length;

                log('Room ' + room + ' has ' + numClients + ' client(s)');
                log('Request to create or join room', room);

                if (numClients == 0){
                        socket.join(room);
                        socket.emit('created', room);
                } else if (numClients == 1) {
                        io.sockets.in(room).emit('join', room);
                        socket.join(room);
                        socket.emit('joined', room);
                } else { // max two clients
                        socket.emit('full', room);
                }
                socket.emit('emit(): client ' + socket.id + ' joined room ' + room);
                socket.broadcast.emit('broadcast(): client ' + socket.id + ' joined room ' + room);

        });

});