Added a utility function around the PermissionDenied exception, in order to easily be able to provide relevant information to the 403 template.

- Legacy-Id: 18332

ietf/utils/response.py

@@ -0,0 +1,10 @@
+# Copyright The IETF Trust 2020, All Rights Reserved
+# -*- coding: utf-8 -*-
+
+from django.core.exceptions import PermissionDenied
+from django.utils.safestring import mark_safe
+
+def permission_denied(request, msg):
+    "A wrapper around the PermissionDenied exception"
+    msg += "  <br/>You can <a href='/accounts/login?next=%s'><u>Log in</u></a> if you have that role but aren't logged in." % request.path
+    raise PermissionDenied(mark_safe(msg))