What is the difference between HTTP and HTTPS protocols in their usage?

HTTP (HyperText Transfer Protocol) and HTTPS (HTTP Secure) are protocols for data transfer on the internet, but with a key difference in security:

• HTTP:

  • Transmits data in plain text.
  • Does not provide encryption, making data vulnerable to interception and tampering.
  • Used for unsecured connections.

• HTTPS:

  • Uses SSL/TLS to encrypt data between the client and server.
  • Ensures confidentiality, integrity, and server authentication.
  • Requires an SSL certificate on the server.

In the context of Node.js:

• An HTTP server is created using the http module.
• For HTTPS — using the https module, where you need to specify the key and certificate.

Example of creating an HTTPS server:

const https = require('https');
const fs = require('fs');

const options = {
  key: fs.readFileSync('server.key'),
  cert: fs.readFileSync('server.cert')
};

https.createServer(options, (req, res) => {
  res.writeHead(200);
  res.end('Hello Secure World!');
}).listen(443);

Using HTTPS is preferable for protecting user data, especially when transmitting personal information, passwords, payment data, etc.