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const http = require('http');
// Create a server object
const server = http.createServer((req, res) => {
// Set the response HTTP header with status code and content type
res.writeHead(200, {'Content-Type': 'text/plain'});
// Send the response body as "Hello World"
res.end('Hello World\n');
});
// Listen on port 3000
server.listen(3000, () => {
console.log('Server running at http://localhost:3000/');
});
This code creates an HTTP server that listens on port 3000 and sends the response “Hello World” whenever a request is made to the server.
const http = require('http');
http.createServer((request, response) => {
response.writeHead(200, {'Content-Type': 'text/plain'});
response.end('Hello World\n');
}).listen(8080);
console.log('Server running at http://localhost:8080/');
In this example, the server is listening on port 8080, and every time a request is made, it responds with a simple “Hello World” message.
HTTP requests can be of different types, such as GET, POST, PUT, DELETE, and more. The type of request is specified in the method property of the request object. You can use conditional statements to handle different types of requests and perform different actions accordingly.
http.createServer((request, response) => {
if (request.method === 'GET') {
// handle GET request
} else if (request.method === 'POST') {
// handle POST request
} else {
response.writeHead(405, {'Content-Type': 'text/plain'});
response.end('Method not allowed\n');
}
}).listen(8080);
In this example, if the request is a GET request, one action is taken, and if it’s a POST request, another action is taken. If the request is of any other type, a “Method not allowed” response is sent back to the client with a 405 status code.
const express = require('express');
const app = express();
app.get('/users', (req, res) => {
// handle the request and send a response
});
In this example, the app.get method defines a route for handling GET requests to the /users endpoint. When a request is received for this endpoint, the function passed as the second argument is executed to handle the request.
One of the main benefits of using a routing mechanism is that it allows you to organize your application’s code into smaller, modular functions that can be reused across multiple endpoints. Additionally, routing can help improve the overall performance and scalability of your application by allowing you to optimize the handling of specific requests and reducing the amount of code that needs to be executed for each request.
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