Ben Ben - 1 year ago 92
Node.js Question

Configuring Express 4.0 routes with

I have created a new Express application. It generated app.js for me and I have then created the following index.js bringing in

var app = require('./app');

var io = require('');
var socket = io.listen(server, { log: false });

socket.on('connection', function (client){
console.log('socket connected!');

Can anyone advise how I would access within the routes files?

For reference, the default generated app.js is below:

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

var routes = 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', 'jade');

app.use(express.static(path.join(__dirname, 'public')));

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

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

/// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}

module.exports = app;

Answer Source

SocketIO does not work with routes it works with sockets.

That said you might want to use express-io instead as this specially made for this or if you are building a realtime web app then try using sailsjs which already has socketIO integrated to it.

Do this to your main app.js

app = require('')()


Then on your routes do something like:

app.get('/', function(req, res) {
    // Do normal req and res here
    // Forward to realtime route'hello')

// This realtime route will handle the realtime request'hello', function(req) {'hello visitor');

See the express-io documentation here.

Or you can do this if you really want to stick with express + socketio

On your app.js

server = http.createServer(app)
io = require('').listen(server)

Then create a file sockets.js

module.exports = function(io) {

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

You can then call that to your routes/controllers.

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