Node.js Web Apps With Express Basic routing
Example
First create an express app:
const express = require('express');
const app = express();
Then you can define routes like this:
app.get('/someUri', function (req, res, next) {})
That structure works for all HTTP methods, and expects a path as the first argument, and a handler for that path, which receives the request and response objects. So, for the basic HTTP methods, these are the routes
// GET www.domain.com/myPath
app.get('/myPath', function (req, res, next) {})
// POST www.domain.com/myPath
app.post('/myPath', function (req, res, next) {})
// PUT www.domain.com/myPath
app.put('/myPath', function (req, res, next) {})
// DELETE www.domain.com/myPath
app.delete('/myPath', function (req, res, next) {})
You can check the complete list of supported verbs here. If you want to define the same behavior for a route and all HTTP methods, you can use:
app.all('/myPath', function (req, res, next) {})
or
app.use('/myPath', function (req, res, next) {})
or
app.use('*', function (req, res, next) {})
// * wildcard will route for all paths
You can chain your route definitions for a single path
app.route('/myPath')
.get(function (req, res, next) {})
.post(function (req, res, next) {})
.put(function (req, res, next) {})
You can also add functions to any HTTP method. They will run before the final callback and take the parameters (req, res, next) as arguments.
// GET www.domain.com/myPath
app.get('/myPath', myFunction, function (req, res, next) {})
Your final callbacks can be stored in an external file to avoid putting too much code in one file:
// other.js
exports.doSomething = function(req, res, next) {/* do some stuff */};
And then in the file containing your routes:
const other = require('./other.js');
app.get('/someUri', myFunction, other.doSomething);
This will make your code much cleaner.
