Authentication Strategies in Next.js

With the increasing focus on security in web applications, implementing robust authentication in Next.js is essential. This guide will go over strategies like OAuth (Google, GitHub), JWT, and cookie-based authentication, along with some code examples.

// Example for Next.js API route with cookie-based authentication
export default function handler(req, res) {
  if (req.method === 'POST') {
    // Set a cookie for authentication
    res.setHeader('Set-Cookie', 'token=some_token_value; HttpOnly; Path=/');
    res.status(200).json({ message: 'User authenticated!' });
  }
}