diff --git a/django/contrib/auth/middleware.py b/django/contrib/auth/middleware.py
new file mode 100644
index 0000000000..f7106eb9be
--- /dev/null
+++ b/django/contrib/auth/middleware.py
@@ -0,0 +1,13 @@
+class RequestUserMiddleware:
+    def process_request(self, request):
+        from django.contrib.auth.models import User, SESSION_KEY
+        try:
+            user_id = request.session[SESSION_KEY]
+            if not user_id:
+                raise ValueError
+            user = User.objects.get(pk=user_id)
+        except (AttributeError, KeyError, ValueError, User.DoesNotExist):
+            from django.parts.auth import anonymoususers
+            user = anonymoususers.AnonymousUser()
+        request.user = user
+        return None