middleware-protection

Protect routes in Next.js using middleware by declaratively defining public and protected paths. This centralizes authentication and authorization logic, checking user authentication status once for all requests to prevent repetitive code across your application.

Role-based access control with Next.js middleware works by evaluating user roles during the request cycle. It implements granular access rules for protected routes, ensuring only authorized users can reach specific API endpoints or pages based on their assigned roles.

Yes, you can return consistent error responses for both API and page requests. The middleware provides appropriate responses automatically, returning JSON errors for APIs and redirects for pages when authentication or role-based authorization fails.

The best way to manage public and protected routes is using declarative middleware. This approach centralizes your route protection configuration, allowing you to easily specify which paths require authentication and which remain public, preventing repetitive authorization code.

Yes, Next.js middleware supports session refresh and user ID propagation. It manages these processes by passing the user ID via headers, ensuring downstream API and page requests receive the necessary authenticated user context.