[Answer]-Django block or redirect all requests

If you want to simply filter requests by context (for example by the URL) or reject all of them, then you can write your own middleware with a process_request method, where you can check for condition(s) and return either None (to continue processing) or HttpResponse with redirect/404/403 (to block processing).

Now, if you want to send signals or perform any other processing, you can do it in another middleware and simply set a proper order in MIDDLEWARE_CLASSES (the “blocking” middleware should be the last).