Does the order of MIDDLEWARE in settings.py matter?

Absolutely. It matters immensely. During the request (inbound), middleware is executed top-to-bottom. `AuthenticationMiddleware` MUST be placed after `SessionMiddleware`, because it relies on the session cookie to identify the user. If you swap them, the app will crash.

What happens to the Response order?

During the response (outbound), middleware executes bottom-to-top! It acts like an onion. The request goes in through the outer layers to the core (View), and the response travels back out from the core through the same layers in reverse order.

Can Middleware block a request?

Yes. In the `__call__` method, instead of calling `self.get_response(request)`, you can simply `return HttpResponseForbidden('Blocked')`. The request will never reach the View, saving database and CPU resources.

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Middleware Architecture

Master Django Middleware. Learn how to globally intercept HTTP requests and responses, implement custom security checks, and utilize Context Processors to inject data into all templates simultaneously.

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