Have you had experience developing your own middleware in Django or similar frameworks?

Yes, in Django, you can create custom middleware layers for processing requests and responses at the framework level. Middleware is a class that intercepts requests before they reach views and/or responses before they are sent to the client.

An example of simple middleware that logs the processing time of a request:

import time

class SimpleTimingMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        start_time = time.time()
        response = self.get_response(request)
        duration = time.time() - start_time
        print(f"Request to {request.path} took {duration:.4f} seconds")
        return response

To use middleware, you need to add its class to the MIDDLEWARE list in Django settings. This approach allows adding cross-cutting functions such as logging, authentication, error handling, etc.