ExpressJS- Routing
ExpressJS - Routing
- Routing refers to how an application's URLs respond to a user request.
- It can manage different types of HTTP requests.
- The function defines routes in an express application:
app.method(path,handler)
- the method here is any one of the HTTP verbs- get, put, post, and delete.
- the path is route.
- handler is call back function.
Example:
In index.js
var express = require('express');
var app = express();
app.get('/', function (req, res) {
console.log("Got a GET request for the homepage");
res.send('Welcome to CodersDaily!');
})
app.post('/', function (req, res) {
console.log("Got a POST request for the homepage");
res.send('I am Impossible! ');
})
app.delete('/del_student', function (req, res) {
console.log("Got a DELETE request for /del_student");
res.send('I am Deleted!');
})
app.get('/enrolled_student', function (req, res) {
console.log("Got a GET request for /enrolled_student");
res.send('I am an enrolled student.');
})
// This responds a GET request for abcd, abxcd, ab123cd, and so on
app.get('/ab*cd', function(req, res) {
console.log("Got a GET request for /ab*cd");
res.send('Pattern Matched.');
})
var server = app.listen(8000, function () {
var host = server.address().address
var port = server.address().port
console.log("Example app listening at http://%s:%s", host, port)
})
Run the server by command on the terminal:
node index.js
In URL: http://localhost:8000/
In URL: http://localhost:8000/enrolled_student
In URL:http://localhost:8000/ab*cd
