Initialize socket.io, attach it to our server and handle some events

gistfile1.js

socketio = require('socket.io')

// Attach socket.io to our web server
io = socketio.listen(server);

io.configure('development', function(){
  io.set('log level', 1);
});

io.sockets.on('connection', function(socket) {
  socket.on('event', function(event) {
    socket.join(event);
  });
});