In Express.js, handling HTTP GET requests is a fundamental aspect of building web applications.
Express provides a straightforward way to define routes for handling these requests.
const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;
// Handling a simple GET request at the root URL "/"
app.get('/', (req, res) => {
res.send('Hello, World!');
});
// Listening on the specified port
app.listen(PORT, () => {
console.log(`Server is running on http://localhost:${PORT}`);
});
const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;
// Handling a GET request with a specific route "/about"
app.get('/about', (req, res) => {
res.send('This is the About page.');
});
// Listening on the specified port
app.listen(PORT, () => {
console.log(`Server is running on http://localhost:${PORT}`);
});
const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;
// Handling a GET request with parameters in the URL
app.get('/user/:id', (req, res) => {
const userId = req.params.id;
res.send(`User ID: ${userId}`);
});
// Listening on the specified port
app.listen(PORT, () => {
console.log(`Server is running on http://localhost:${PORT}`);
});
const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;
// Handling a GET request with query parameters
app.get('/search', (req, res) => {
const query = req.query.name;
res.send(`Search Query: ${query}`);
});
// Listening on the specified port
app.listen(PORT, () => {
console.log(`Server is running on http://localhost:${PORT}`);
});
const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;
// Handling a simple GET request at the root URL "/"
app.get('/', (req, res) => {
res.send('Hello, World!');
});
// Handling a GET request with a specific route "/about"
app.get('/about', (req, res) => {
res.send('This is the About page.');
});
// Handling a GET request with parameters in the URL
app.get('/user/:id', (req, res) => {
const userId = req.params.id;
res.send(`User ID: ${userId}`);
});
// Handling a GET request with query parameters
app.get('/search', (req, res) => {
const query = req.query.name;
res.send(`Search Query: ${query}`);
});
// Listening on the specified port
app.listen(PORT, () => {
console.log(`Server is running on http://localhost:${PORT}`);
});
"app.get()" is used to define a route for handling HTTP GET requests.
The first parameter of app.get() is the path or route, and the second parameter is a callback function that gets executed when a request is made to that route.
The req (request) object provides information about the incoming request, and the res (response) object is used to send a response back to the client.
Handling a simple GET request at the root URL ("/").
Handling a GET request with a specific route ("/about").
Handling a GET request with parameters in the URL ("/user/:id").
Handling a GET request with query parameters ("/search?name=Alice").
// navigate to folder location where server.js exist node server.js