fix: skip Content-Type gate when request is None (#2843)

Legacy-UI batch flows invoke route handlers internally with request=None,
which previously raised AttributeError on request.content_type.

Signed-off-by: SAY-5 <say.apm35@gmail.com>

glob/manager_server.py

@@ -353,8 +353,12 @@ def _reject_simple_form_content_type(request):
         web.Response(status=400) when the request has a simple-form
         Content-Type that must be rejected. None when the request is allowed
         to proceed (no Content-Type, application/json, or any non-simple
-        Content-Type).
+        Content-Type, or no request object — internal caller).
     """
+    # Internal callers (e.g. legacy-UI batch flows) invoke route handlers
+    # directly with request=None; there is no Content-Type to gate.
+    if request is None:
+        return None
     if request.content_type in _SIMPLE_FORM_CONTENT_TYPES:
         return web.Response(
             status=400,

tests/test_csrf_content_type_helper.py

@@ -116,6 +116,12 @@ class ContentTypeRejectionTest(unittest.TestCase):
         r = self._post({"Content-Type": "application/json"})
         self.assertEqual(r.status, 200)
 
+    def test_none_request_allowed(self):
+        # Internal callers (e.g. legacy-UI batch flows) invoke route handlers
+        # directly with request=None; helper must not raise AttributeError.
+        # Regression test for issue #2843.
+        self.assertIsNone(_reject_simple_form_content_type(None))
+
 
 if __name__ == "__main__":
     unittest.main(verbosity=2)