How can you create a basic HTTP server using Node.js?

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You can create a basic HTTP server in Node.js using the built-in http module, which allows your application to listen for and respond to client requests (like those from a browser).

Here’s how to create a basic server:

const http = require('http');

// Create the server
const server = http.createServer((req, res) => {
  res.statusCode = 200; // Success status
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello, this is your first Node.js server!');
});

// Define the port to listen on
const PORT = 3000;

// Start the server
server.listen(PORT, () => {
  console.log(`Server running at http://localhost:${PORT}/`);
});

Breakdown:

1. http module: Required to create an HTTP server.

2. createServer(): Takes a callback with req (request) and res (response) objects.

3. res.statusCode: Sets the status (200 = OK).

4. res.setHeader(): Defines the response type.

5. res.end(): Sends a response back and ends the request.

6. listen(): Binds the server to a port and starts listening.

Once you run this file (node server.js), visit http://localhost:3000 in your browser and you’ll see the message.

This is the foundation for building more complex APIs, web apps, or connecting with frameworks like Express.js.

Read More :

What is middleware in Node.js?

What is the difference between synchronous and asynchronous functions?

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