Question

What is the role of middleware in Server-Side APIs?

Answer 1

Middleware functions are essential for processing requests and responses in Server-Side APIs. They:

1. Handle Authentication: Validate user credentials before proceeding.
2. Log Requests: Track and log API activity for debugging or auditing.
3. Modify Responses: Add headers or transform data before sending it to the client.
4. Error Handling: Capture and process errors to provide meaningful feedback.
5. Performance Optimization: Apply rate limiting or caching at intermediate steps.

Middleware layers enhance API functionality, modularity, and security.