server.js
var http = require('http');
var express = require('express'); //package che ci semplifica la parte server-side
var app = express(); //this is different from old method .createServer(), it returns a javascript function
var jade = require('jade'); //tamplate gestore
var io = require('socket.io');
var server = http.createServer(app);
io = io.listen(server); //this return the new object we want to listen to
server.listen(3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.set("view options", {layout: false});
app.use(express.static(__dirname + '/public')); //no need to use .configure
app.get('/', function(req, res){
res.render('home.jade');
});
//app.listen(3000); //express ascolterà questa porta
//connection even lanciato quando un client prova a collegarsi al server
//socket.io crea una nuova socket (utilizzata poi per scambiare messaggi)
io.sockets.on('connection', function(socket){
socket.on('setPseudo', function(data){
socket.set('pseudo', data); //il nickname? lo pseudonimo per quella socket?
});
socket.on('message', function (message) {
socket.get('pseudo', function (error, name) {
var data = { 'message' : message, pseudo : name };
socket.broadcast.emit('message', data);
console.log("user " + name + " send this : " + message);
})
});
});
//The nice thing about Socket.io is that we don't have to worry about handling client disconnections.
//When it disconnects, Socket.io will no longer receive responses to "heartbeat" messages
//and will deactivate the session associated with the client.
//If it was just a temporary disconnection, the client will reconnect and continue with the session.
If you wish to know more about node.js, please read the referred article by Guillaume Besson.
