This is my attempt at making a web framework in Node.js from scratch, the goal is to be API-compatible with express.js.

var app = require('lib/app.js')()

app.get('/', function (req, res) {
  res.send('Hello World')
})

app.listen(3000)

Other examples are available in the examples folder.

What is implemented

• app.get(path, callback): path could have named parameters also, which will be available in the req object passed to the callback.

  app.get('/user/:name', (req, res) => {
    console.log(req.params)
    // GET /user/aissam => params = { name: 'aissam' }
  })

  The query string is also accessible though the request object

  app.get('/user/:name', (req, res) => {
    console.log(req.query)
    // GET /user/aissam?age=130 => params = { age: '130' }
  })

• app.post(path, callback) works in the same way as app.get, except it's handling POST requests.

• app.use([path,] callback) Mounts the specified middleware function or functions at the specified path: the middleware function is executed when the base of the requested path matches path, useful for logging every request for example.

• Response methods:

  • res.send([body]) sends either a string as text/html, or if passed an object sends it as application/json.

  • sendFile([path]) transfers the file at the given path.

  • res.status(code) sets the HTTP status for the response.

  • res.render(view [, options]) render a view, a rendering engine must specified before, views are considered to be in the views directory unless specified otherwise, options contain the elements to be injected when rendering the view.

    // app.set('views', 'views-directory') // setting another views directory
    app.set('view engine', 'ejs')
    app.get('/template', (req, res) => {
      res.render('template.ejs', { foo: 'bar' })
    })