fix: Return an absolute url on libraries v2 backup endpoint.

openedx/core/djangoapps/content_libraries/api/libraries.py

@@ -681,7 +681,7 @@ def get_backup_task_status(
 
     Returns a dictionary with the following keys:
         - state: One of "Pending", "Exporting", "Succeeded", "Failed"
-        - url: If state is "Succeeded", the URL where the exported .zip file can be downloaded. Otherwise, None.
+        - file: If state is "Succeeded", the FileField of the exported .zip. Otherwise, None.
     If no task is found, returns None.
     """
 
@@ -690,10 +690,10 @@ def get_backup_task_status(
     except UserTaskStatus.DoesNotExist:
         return None
 
-    result = {'state': task_status.state, 'url': None}
+    result = {'state': task_status.state, 'file': None}
 
     if task_status.state == UserTaskStatus.SUCCEEDED:
         artifact = UserTaskArtifact.objects.get(status=task_status, name='Output')
-        result['url'] = artifact.file.storage.url(artifact.file.name)
+        result['file'] = artifact.file
 
     return result

openedx/core/djangoapps/content_libraries/rest_api/libraries.py

@@ -786,8 +786,8 @@ def get(self, request, lib_key_str):
 
         if not result:
             raise NotFound(detail="No backup found for this library.")
-
-        return Response(LibraryBackupTaskStatusSerializer(result).data)
+        # Passing request context to the serializer so the url absolute path is correctly generated
+        return Response(LibraryBackupTaskStatusSerializer(result, context={'request': request}).data)
 
 
 # LTI 1.3 Views

openedx/core/djangoapps/content_libraries/rest_api/serializers.py

@@ -425,4 +425,4 @@ class LibraryBackupTaskStatusSerializer(serializers.Serializer):
     Serializer for checking the status of a library backup task.
     """
     state = serializers.CharField()
-    url = serializers.URLField(allow_null=True)
+    url = serializers.FileField(source='file', allow_null=True, use_url=True)

openedx/core/djangoapps/content_libraries/tests/test_api.py

@@ -1430,7 +1430,7 @@ def test_get_backup_task_status_in_progress(self) -> None:
             status = api.get_backup_task_status(self.user.id, task_id=task_id)
             assert status is not None
             assert status['state'] == UserTaskStatus.IN_PROGRESS
-            assert status['url'] is None
+            assert status['file'] is None
 
     def test_get_backup_task_status_succeeded(self) -> None:
         # Create a mock UserTaskStatus in SUCCEEDED state
@@ -1444,7 +1444,7 @@ def test_get_backup_task_status_succeeded(self) -> None:
 
         # Create a mock UserTaskArtifact
         mock_artifact = mock.Mock()
-        mock_artifact.file.storage.url.return_value = "/media/user_tasks/2025/10/01/library-libOEXCSPROB_mOw1rPL.zip"
+        mock_artifact.file.url = "/media/user_tasks/2025/10/01/library-libOEXCSPROB_mOw1rPL.zip"
 
         with mock.patch(
             'openedx.core.djangoapps.content_libraries.api.libraries.UserTaskStatus.objects.get'
@@ -1458,7 +1458,7 @@ def test_get_backup_task_status_succeeded(self) -> None:
             status = api.get_backup_task_status(self.user.id, task_id=task_id)
             assert status is not None
             assert status['state'] == UserTaskStatus.SUCCEEDED
-            assert status['url'] == "/media/user_tasks/2025/10/01/library-libOEXCSPROB_mOw1rPL.zip"
+            assert status['file'].url == "/media/user_tasks/2025/10/01/library-libOEXCSPROB_mOw1rPL.zip"
 
     def test_get_backup_task_status_failed(self) -> None:
         # Create a mock UserTaskStatus in FAILED state
@@ -1478,4 +1478,4 @@ def test_get_backup_task_status_failed(self) -> None:
             status = api.get_backup_task_status(self.user.id, task_id=task_id)
             assert status is not None
             assert status['state'] == UserTaskStatus.FAILED
-            assert status['url'] is None
+            assert status['file'] is None