How do I implement basic authentication in my web application?

How do I implement basic authentication in my web application?

To implement basic authentication, you can use the HTTP Authorization header to send credentials.

What programming languages can I use for this?

You can implement basic authentication in languages like JavaScript, Python, PHP, and Ruby.

Can you provide a code example?

Sure! Here's a simple example in Node.js using Express:

const express = require('express');
const app = express();

app.use((req, res, next) => {
    const auth = req.headers['authorization'];
    if (!auth) return res.sendStatus(401);
    const [username, password] = Buffer.from(auth.split(' ')[1], 'base64').toString().split(':');
    if (username === 'user' && password === 'pass') {
        next();
    } else {
        res.sendStatus(403);
    }
});

app.get('/', (req, res) => {
    res.send('Hello, authenticated user!');
});

app.listen(3000, () => console.log('Server running on port 3000')); 

What are the security implications of using basic authentication?

Basic authentication sends credentials in an encoded format, which can be easily decoded. It's recommended to use HTTPS to secure the transmission.