core: redesign request middleware with django latest design and better use of threading

core/middleware.py

@@ -50,27 +50,31 @@ class AuthenticationMiddleware(DjangoAuthenticationMiddleware):
     def process_request(self, request):
         assert hasattr(request, "session"), (
             "The Django authentication middleware requires session middleware "
-            "to be installed. Edit your MIDDLEWARE_CLASSES setting to insert "
+            "to be installed. Edit your MIDDLEWARE setting to insert "
             "'django.contrib.sessions.middleware.SessionMiddleware' before "
             "'account.middleware.AuthenticationMiddleware'."
         )
         request.user = SimpleLazyObject(lambda: get_cached_user(request))
 
 
-class RequestMiddleware:
+_threadlocal = threading.local()
+
+
+def get_signal_request():
     """
+    !!! Do not use if your operation is asynchronus !!!
     Allow to access current request in signals
     This is a hack that looks into the thread
-    !!! Do not use if your operation is asynchronus !!!
     Mainly used for log purpose
     """
 
-    def __init__(self, get_response, thread_local=threading.local()):
+    return getattr(_threadlocal, "request", None)
+
+
+class SignalRequestMiddleware:
+    def __init__(self, get_response):
         self.get_response = get_response
-        self.thread_local = thread_local
 
     def __call__(self, request):
-        self.thread_local.current_request = request
-
-        response = self.get_response(request)
-        return response
+        setattr(_threadlocal, "request", request)
+        return self.get_response(request)