What is authentication middleware and how does it work?

What is authentication middleware and how does it work?

Authentication middleware is a software layer that handles user authentication in web applications. It verifies user credentials before granting access to protected resources.

Can you give me an example of how to implement it in a Node.js application?

Sure! In a Node.js app, you can use middleware like Passport.js to handle authentication. You would set it up in your Express app to check user credentials.

What are some common authentication strategies used?

Common strategies include local authentication (username/password), OAuth (using third-party services), and JWT (JSON Web Tokens) for stateless authentication.

How do I secure my API endpoints with authentication middleware?

You can secure your API endpoints by applying the authentication middleware to routes that require user verification, ensuring only authenticated users can access them.