Socet.io not working in routes - node.js

Question

I have searched all over but all I find are basic ways to use socket.io.
I am trying to use socket.io in one of my routes but cant. I am using express, node.js, and jade. My issues is that i cant access io variable form app.j in other routes. Im not sure if am just supposed to call it every time. Also, when i try to requre the exported app.js modules its says that the app.j could not be found.
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 app = express();
//SOCKET/I/o
var http = require('http').Server(app);
var io = require('socket.io')(http);
var port = process.env.PORT || 3000;
//
var login = require('./routes/login');
var index = require('./routes/index');
var users = require('./routes/users');
var news = require('./routes/news');
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
// uncomment after placing your favicon in /public
// TODO Not sure if this is working
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('/', login);
app.use('/index',index);
app.use('/users', users);
app.use('/news',news);
// 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;
/routes/login.js
var express = require('express');
var app = require('./app');
var firebase = require("firebase");
var router = express.Router();
router.get('/', function(req, res, next) {
res.render('login');
});
io.on('connection', function (socket) {
socket.emit('news', { hello: 'world' });
socket.on('my other event', function (data) {
console.log(data);
});
});
module.exports = router;
/views/login.jade
doctype html
html
head
title login
link(rel='stylesheet', href='/stylesheets/main.css')
body
input(type="email",placeholder="email",id="userEmail")
input(type="password",placeholder="password",id="userPassword")
script(src="https://cdn.socket.io/socket.io-1.2.0.js")
script.
socket.on('connection', function (data) {
console.log(data);
socket.emit('my other event', {my: 'data'});
});
button(onclick='signin()') Sign In
button(onclick='signup()') Sign Up

Answer 1

As you're not running a single-page-app with html-router, the Socket.io instance is only initialised on the first route, so for every route you have to do this:
var socket = io()
socket.on('connection', function (data) {
console.log(data);
socket.emit('my other event', {my: 'data'});
});
Only then it would work.