Basic route definition in Express.JS

app.js

app.get('/arcticle', function (req, res){
  // get article from somewhere
  res.send(article);
});

app.post('/article', function (req, res) {
  // create article
});

app.put('/article', function (req, res) {
  // update article
});

app.delete('/article', function (req, res) {
  // delete article
});