Initial commit. Basic models mostly done.

venv/lib/python3.8/site-packages/django/contrib/admindocs/middleware.py

@@ -0,0 +1,30 @@
+from django.conf import settings
+from django.http import HttpResponse
+from django.utils.deprecation import MiddlewareMixin
+
+from .utils import get_view_name
+
+
+class XViewMiddleware(MiddlewareMixin):
+    """
+    Add an X-View header to internal HEAD requests.
+    """
+    def process_view(self, request, view_func, view_args, view_kwargs):
+        """
+        If the request method is HEAD and either the IP is internal or the
+        user is a logged-in staff member, return a responsewith an x-view
+        header indicating the view function. This is used to lookup the view
+        function for an arbitrary page.
+        """
+        assert hasattr(request, 'user'), (
+            "The XView middleware requires authentication middleware to be "
+            "installed. Edit your MIDDLEWARE%s setting to insert "
+            "'django.contrib.auth.middleware.AuthenticationMiddleware'." % (
+                "_CLASSES" if settings.MIDDLEWARE is None else ""
+            )
+        )
+        if request.method == 'HEAD' and (request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS or
+                                         (request.user.is_active and request.user.is_staff)):
+            response = HttpResponse()
+            response['X-View'] = get_view_name(view_func)
+            return response