Setting up a basic server

Setting up a basic server in Node.js is straightforward. Here’s a step-by-step guide to help you get started:

1. Install Node.js

• First, ensure you have Node.js installed on your system. You can download it from the official Node.js website.

• Verify the installation by running the following commands in your terminal:

  node -v
  npm -v
  

2. Create a New Directory for Your Project

• Create a new directory for your server and navigate into it:

  mkdir my-basic-server
  cd my-basic-server
  

3. Initialize a Node.js Project

• Initialize a new Node.js project by running:

  npm init -y
  

• This will create a package.json file with default settings.

4. Create the Server File

• Create a new file called server.js:

  touch server.js
  

5. Write Basic Server Code

• Open server.js in your favorite text editor and write the following code:

  // Import the HTTP module
  const http = require('http');
  
  // Define the hostname and port
  const hostname = '127.0.0.1';
  const port = 3000;
  
  // Create the server
  const server = http.createServer((req, res) => {
    res.statusCode = 200;
    res.setHeader('Content-Type', 'text/plain');
    res.end('Hello, World!\n');
  });
  
  // Start the server
  server.listen(port, hostname, () => {
    console.log(`Server running at http://${hostname}:${port}/`);
  });
  

6. Run the Server

• Run the server using Node.js:

  node server.js
  

• You should see the following output in your terminal:

  Server running at http://127.0.0.1:3000/
  

7. Test the Server

• Open your web browser and navigate to http://127.0.0.1:3000/.
• You should see the message "Hello, World!" displayed in your browser.

Explanation of the Code:

• http.createServer(): This method creates an HTTP server that listens to server requests.
• req and res: The req object represents the request from the client, and the res object is the response that will be sent back.
• res.statusCode = 200;: Sets the HTTP status code to 200, indicating success.
• res.setHeader('Content-Type', 'text/plain');: Sets the response header to indicate the content type.
• res.end('Hello, World!\n');: Sends the response "Hello, World!" and ends the request.

Now you have a basic server running in Node.js!