Express routing examples

// Option 1: require inline

var app = express();

app.get('/', require('routes/index'));
app.get('/login', require('routes/login').index);
app.post('/login', require('routes/login').do_login);

// Easy to split up routes
// Centralized route paths
// However, potentially lots of duplication

// Option 2: pass an app around

var app = express();

require('routes/index')(app);
require('routes/login')(app);

//== routes/index
module.exports = function(app) {
  app.get('/', index)
}

function index(req, res) {
  // ...
}

//== routes/login
module.exports = function(app) {
  app.get('/login', index);
  app.post('/login', do_login);
}

function index(req, res) { }
function do_login(req, res) { }

// Nicely encapsulates different sections of the site
// Harder to find exactly which route file handles which path
// Too bad /login gets repeated once for every route...

// Express 4: Routers!
var app = express();

var index = require('routes/index'),
    login = require('routes/login');

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

//== routes/index
var router = module.exports = express.Router();

router.get('/', index);

function index() { }

//== routes/login
var router = module.exports = express.Router();

// Relative to this router. We can mount it to some prefix that could change easily!
router.get('/', index);
router.post('/', do_login);