How to export all routes in Express?

I have an NodeJS Express app that is getting really big in just one file (app.js).

I want to export all my routes into a single, external file, say `./lib/routes.js`. How to do that?

How to export the following bit of code and require it correctly in main `app.js`?



app.get('/logout', function(req, res) {
res.render('logout', {
username: req.session.username
});
});

app.get('/dashboard', function(req, res) {
res.render('dashboard', {
username: req.session.username
});
});

app.get('/login', function(req, res) {
res.render('login', {
badLogin: false,
loginError: false
});
});

Why not do something like this:

// logout.js
module.exports = function(req, res){
res.render('logout', {
username: req.session.username
});
});

// dashboard.js
module.exports = function(req, res){
res.render('dashboard', {
username: req.session.username
});
});

// login.js
module.exports = function(req, res){
res.render('login', {
badLogin: false,
loginError: false
});
});

// app.js
app.get('/logout', require('logout'));
app.get('/dashboard', require('dashboard'));
app.get('/login', require('login'));

Also, you could imagine easily using

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to loop through a *routes* directory and load these up programmatically.

You could even do something along the lines of...

module.exports.handler[] = {
method : 'get',
route : '/login',
action : res.render('login', {
badLogin: false,
loginError: false
});
}

Though I think I'd spend a little time thinking about how to simplify that.

What I do is group my routes by controller. For each group of related routes (users, shopping cart, whatever), I make a controller file that lives in `app/controllers/foo.js` where `foo` is the controller name. In my main javascript server file (where all your code currently lives), I `require` each controller by name and then call its `setup` function, passing in my express `app` object, and allow the controller to add whatever routes it needs.

['api', 'authorization', 'users', 'tests'].map(function(controllerName) {
var controller = require('./controllers/' + controllerName);
controller.setup(app);
});

Inside each controller, I do something like:

exports.setup = function(app) {
app.get('/dashboard', function(req, res) {
res.render('dashboard', {
username: req.session.username
});
});
};

using glob you can export all routes on directory for example '/routes':

> npm i --save glob

``` lang:js

// *** /routes/index.js file ***

const express = require('express')
const Router = express.Router
const router = Router()
const glob = require('glob')


/**
* options ignore files inside routes folder
*/
const options = {
ignore: [`${__dirname}/_helpers.js`, `${__dirname}/index.js`]
}

/**
* read all files on current directory and export routes as lowercase of the filename
* example 'routes/Products.js' route will be access by '/products'
*/
const routes =
glob.sync(__dirname + '/*.js', options)
.map(filename => {
const arr = filename.split('/')
let name = arr.pop();
name = name.replace('.js', '')
return {
path: `/${name.toLowerCase()}`,
router: require(`${filename.replace('.js', '')}`)
}
})
.filter(obj => Object.getPrototypeOf(obj.router) == Router)
.forEach(obj => router.use(obj.path, obj.router))


module.exports = router;
```


then

> on app.js

``` lang:js
// app.js file

const express = require('express')
const routes = require('./routes')


const app = express()

app.use('/api', routes)

```