app.js

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var index = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', index);
app.use('/users', users);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;

var debug = require('debug')('projectname');

app.set('port', process.env.PORT || 3000);

var server = app.listen(app.get('port'), function() {
  debug('Express server listening on port ' + server.address().port);
});

var io = require('socket.io')(server);

io.on('connection', function(socket){
  console.log(socket.id, 'has connected!');

  socket.on('disconnect', function(socket) {
    console.log(socket.id, 'see ya later');
  });

  socket.on('chat message', function(msg, usr) {
    console.log('got message: ' +  msg + ' from ' + usr);
    io.sockets.emit('chat message', msg, usr);
  });

  socket.on('mouse', function(data) {
    // might be nice to see who's moving
    data.id = socket.id;
    console.log('other mouse', data);
    //socket.broadcast.emit('other mouse', data);
  });
});