Do not redirect requests for media / static / api / js files

- For these paths, just return a 401
- This is necessary to stop unauthorized calls to the API or to request media files from redirecting to the login page

InvenTree/InvenTree/middleware.py

@@ -1,9 +1,12 @@
-from django.shortcuts import HttpResponseRedirect
-from django.urls import reverse_lazy, Resolver404
-from django.shortcuts import redirect
-from django.urls import include, re_path
+# -*- coding: utf-8 -*-
+
 from django.conf import settings
 from django.contrib.auth.middleware import PersistentRemoteUserMiddleware
+from django.http import HttpResponse
+from django.shortcuts import HttpResponseRedirect
+from django.shortcuts import redirect
+from django.urls import reverse_lazy, Resolver404
+from django.urls import include, re_path
 
 import logging
 
@@ -82,11 +85,23 @@ class AuthRequiredMiddleware(object):
                     reverse_lazy('admin:logout'),
                 ]
 
-                if path not in urls and not path.startswith('/api/'):
+                # Do not redirect requests to any of these paths
+                paths_ignore = [
+                    '/api/',
+                    '/js/',
+                    '/media/',
+                    '/static/',
+                ]
+
+                if path not in urls and not any([path.startswith(p) for p in paths_ignore]):
                     # Save the 'next' parameter to pass through to the login view
 
                     return redirect('{}?next={}'.format(reverse_lazy('account_login'), request.path))
 
+                else:
+                    # Return a 401 (Unauthorized) response code for this request
+                    return HttpResponse('Unauthorized', status=401)
+
         response = self.get_response(request)
 
         return response