How can I implement JWT security in my Next.js application?

How can I implement JWT security in my Next.js application?

To implement JWT security in your Next.js app, you can use libraries like jsonwebtoken and next-auth. Would you like a code example?

Yes, please provide a code example for generating a JWT.

Sure! Here's a simple example:

import jwt from 'jsonwebtoken';

const secretKey = 'your_secret_key';

const token = jwt.sign({ userId: 123 }, secretKey, { expiresIn: '1h' });
console.log(token);

This generates a JWT with a payload containing the user ID.

How do I verify the JWT on the server side?

You can verify the JWT using the same jsonwebtoken library. Here's how:

const decoded = jwt.verify(token, secretKey);
console.log(decoded);

This will return the decoded payload if the token is valid.

What should I do if the token is invalid?

If the token is invalid, you should return a 401 Unauthorized response and prompt the user to log in again.