First stab at external authentication support

netbox/utilities/middleware.py

@@ -1,6 +1,7 @@
 from urllib import parse
 
 from django.conf import settings
+from django.contrib.auth.middleware import RemoteUserMiddleware as RemoteUserMiddleware_
 from django.db import ProgrammingError
 from django.http import Http404, HttpResponseRedirect
 from django.urls import reverse
@@ -30,6 +31,14 @@ class LoginRequiredMiddleware(object):
         return self.get_response(request)
 
 
+class RemoteUserMiddleware(RemoteUserMiddleware_):
+    """
+    Custom implementation of Django's RemoteUserMiddleware which allows for a user-configurable HTTP header name.
+    """
+    force_logout_if_no_header = False
+    header = settings.REMOTE_AUTH_HEADER
+
+
 class APIVersionMiddleware(object):
     """
     If the request is for an API endpoint, include the API version as a response header.