app.js

/*!
 * app.js is the server component of slippery
 *
 */

var Express = require('express');
var WebSocket = require('faye-websocket');

var PORT = 8080;

/*
 * set up the application
 */
var app = module.exports = Express.createServer();
//import the socket.io module and start listening

app.configure(function () {
    //setup view engine
    //setup bodyParser, cookieParser and sessionStore
    app.use(Express['static'](__dirname + '/public'));
    app.use(app.router);
  });

var connections = [];

function broadcast(event) {
  connections.forEach(function (socket) {
      console.log('sending ' + event.data);
      socket.send(event.data);
    });
}

//rewrite and use socket.io
app.addListener('upgrade', function(request, socket, head) {
    console.log('upgrade');

    var ws = new WebSocket(request, socket, head);
    connections.push(ws);

    ws.onmessage = function (event) {
      broadcast(event);
    };

    ws.onclose = function (event) {
      console.log('close', event.code, event.reason);
      connections = connections.splice(connections.indexOf(ws));
      ws = null;
    };
  });

//implement routes

app.listen(PORT, function () {
    console.log('Server listening on port: http://localhost:' + PORT);
  });