Fix #619: Use attributedTo instead of actor in library ActivityPub payload

api/funkwhale_api/federation/serializers.py

@@ -556,6 +556,7 @@ def get_additional_fields(data):
 PAGINATED_COLLECTION_JSONLD_MAPPING = {
     "totalItems": jsonld.first_val(contexts.AS.totalItems),
     "actor": jsonld.first_id(contexts.AS.actor),
+    "attributedTo": jsonld.first_id(contexts.AS.attributedTo),
     "first": jsonld.first_id(contexts.AS.first),
     "last": jsonld.first_id(contexts.AS.last),
     "partOf": jsonld.first_id(contexts.AS.partOf),
@@ -565,7 +566,8 @@ PAGINATED_COLLECTION_JSONLD_MAPPING = {
 class PaginatedCollectionSerializer(jsonld.JsonLdSerializer):
     type = serializers.ChoiceField(choices=[contexts.AS.Collection])
     totalItems = serializers.IntegerField(min_value=0)
-    actor = serializers.URLField(max_length=500)
+    actor = serializers.URLField(max_length=500, required=False)
+    attributedTo = serializers.URLField(max_length=500, required=False)
     id = serializers.URLField(max_length=500)
     first = serializers.URLField(max_length=500)
     last = serializers.URLField(max_length=500)
@@ -573,6 +575,18 @@ class PaginatedCollectionSerializer(jsonld.JsonLdSerializer):
     class Meta:
         jsonld_mapping = PAGINATED_COLLECTION_JSONLD_MAPPING
 
+    def validate(self, validated_data):
+        d = super().validate(validated_data)
+        actor = d.get("actor")
+        attributed_to = d.get("attributedTo")
+        if not actor and not attributed_to:
+            raise serializers.ValidationError(
+                "You need to provide at least actor or attributedTo"
+            )
+
+        d["attributedTo"] = attributed_to or actor
+        return d
+
     def to_representation(self, conf):
         paginator = Paginator(conf["items"], conf.get("page_size", 20))
         first = funkwhale_utils.set_query_parameter(conf["id"], page=1)
@@ -580,7 +594,9 @@ class PaginatedCollectionSerializer(jsonld.JsonLdSerializer):
         last = funkwhale_utils.set_query_parameter(conf["id"], page=paginator.num_pages)
         d = {
             "id": conf["id"],
+            # XXX Stable release: remove the obsolete actor field
             "actor": conf["actor"].fid,
+            "attributedTo": conf["actor"].fid,
             "totalItems": paginator.count,
             "type": conf.get("type", "Collection"),
             "current": current,
@@ -624,7 +640,9 @@ class LibrarySerializer(PaginatedCollectionSerializer):
             "name": library.name,
             "summary": library.description,
             "page_size": 100,
+            # XXX Stable release: remove the obsolete actor field
             "actor": library.actor,
+            "attributedTo": library.actor,
             "items": library.uploads.for_federation(),
             "type": "Library",
         }
@@ -637,7 +655,7 @@ class LibrarySerializer(PaginatedCollectionSerializer):
 
     def create(self, validated_data):
         actor = utils.retrieve_ap_object(
-            validated_data["actor"],
+            validated_data["attributedTo"],
             actor=self.context.get("fetch_actor"),
             queryset=models.Actor,
             serializer_class=ActorSerializer,
@@ -661,7 +679,8 @@ class CollectionPageSerializer(jsonld.JsonLdSerializer):
     type = serializers.ChoiceField(choices=[contexts.AS.CollectionPage])
     totalItems = serializers.IntegerField(min_value=0)
     items = serializers.ListField()
-    actor = serializers.URLField(max_length=500)
+    actor = serializers.URLField(max_length=500, required=False)
+    attributedTo = serializers.URLField(max_length=500, required=False)
     id = serializers.URLField(max_length=500)
     first = serializers.URLField(max_length=500)
     last = serializers.URLField(max_length=500)
@@ -674,6 +693,7 @@ class CollectionPageSerializer(jsonld.JsonLdSerializer):
             "totalItems": jsonld.first_val(contexts.AS.totalItems),
             "items": jsonld.raw(contexts.AS.items),
             "actor": jsonld.first_id(contexts.AS.actor),
+            "attributedTo": jsonld.first_id(contexts.AS.attributedTo),
             "first": jsonld.first_id(contexts.AS.first),
             "last": jsonld.first_id(contexts.AS.last),
             "next": jsonld.first_id(contexts.AS.next),
@@ -706,7 +726,9 @@ class CollectionPageSerializer(jsonld.JsonLdSerializer):
         d = {
             "id": id,
             "partOf": conf["id"],
+            # XXX Stable release: remove the obsolete actor field
             "actor": conf["actor"].fid,
+            "attributedTo": conf["actor"].fid,
             "totalItems": page.paginator.count,
             "type": "CollectionPage",
             "first": first,

api/tests/federation/test_serializers.py

@@ -334,6 +334,7 @@ def test_paginated_collection_serializer(factories):
         "type": "Collection",
         "id": conf["id"],
         "actor": actor.fid,
+        "attributedTo": actor.fid,
         "totalItems": len(uploads),
         "current": conf["id"] + "?page=1",
         "last": conf["id"] + "?page=3",
@@ -352,6 +353,7 @@ def test_paginated_collection_serializer_validation():
         "id": "https://test.federation/test",
         "totalItems": 5,
         "actor": "http://test.actor",
+        "attributedTo": "http://test.actor",
         "first": "https://test.federation/test?page=1",
         "last": "https://test.federation/test?page=1",
         "items": [],
@@ -362,7 +364,7 @@ def test_paginated_collection_serializer_validation():
     assert serializer.is_valid(raise_exception=True) is True
     assert serializer.validated_data["totalItems"] == 5
     assert serializer.validated_data["id"] == data["id"]
-    assert serializer.validated_data["actor"] == data["actor"]
+    assert serializer.validated_data["attributedTo"] == data["actor"]
 
 
 def test_collection_page_serializer_validation():
@@ -373,6 +375,7 @@ def test_collection_page_serializer_validation():
         "id": base + "?page=2",
         "totalItems": 5,
         "actor": "https://test.actor",
+        "attributedTo": "https://test.actor",
         "items": [],
         "first": "https://test.federation/test?page=1",
         "last": "https://test.federation/test?page=3",
@@ -386,7 +389,7 @@ def test_collection_page_serializer_validation():
     assert serializer.is_valid(raise_exception=True) is True
     assert serializer.validated_data["totalItems"] == 5
     assert serializer.validated_data["id"] == data["id"]
-    assert serializer.validated_data["actor"] == data["actor"]
+    assert serializer.validated_data["attributedTo"] == data["actor"]
     assert serializer.validated_data["items"] == []
     assert serializer.validated_data["prev"] == data["prev"]
     assert serializer.validated_data["next"] == data["next"]
@@ -398,7 +401,7 @@ def test_collection_page_serializer_can_validate_child():
         "@context": jsonld.get_default_context(),
         "type": "CollectionPage",
         "id": "https://test.page?page=2",
-        "actor": "https://test.actor",
+        "attributedTo": "https://test.actor",
         "first": "https://test.page?page=1",
         "last": "https://test.page?page=3",
         "partOf": "https://test.page",
@@ -430,6 +433,7 @@ def test_collection_page_serializer(factories):
         "type": "CollectionPage",
         "id": conf["id"] + "?page=2",
         "actor": actor.fid,
+        "attributedTo": actor.fid,
         "totalItems": len(uploads),
         "partOf": conf["id"],
         "prev": conf["id"] + "?page=1",
@@ -464,6 +468,7 @@ def test_music_library_serializer_to_ap(factories):
         "name": library.name,
         "summary": library.description,
         "actor": library.actor.fid,
+        "attributedTo": library.actor.fid,
         "totalItems": 0,
         "current": library.fid + "?page=1",
         "last": library.fid + "?page=1",
@@ -487,7 +492,7 @@ def test_music_library_serializer_from_public(factories, mocker):
         "type": "Library",
         "id": "https://library.id",
         "followers": "https://library.id/followers",
-        "actor": actor.fid,
+        "attributedTo": actor.fid,
         "totalItems": 12,
         "first": "https://library.id?page=1",
         "last": "https://library.id?page=2",
@@ -527,7 +532,7 @@ def test_music_library_serializer_from_private(factories, mocker):
         "type": "Library",
         "id": "https://library.id",
         "followers": "https://library.id/followers",
-        "actor": actor.fid,
+        "attributedTo": actor.fid,
         "totalItems": 12,
         "first": "https://library.id?page=1",
         "last": "https://library.id?page=2",

changes/changelog.d/619.enhancement

@@ -0,0 +1 @@
+Use attributedTo instead of actor in library ActivityPub payload (#619)

docs/federation/index.rst

@@ -585,7 +585,7 @@ Example
   {
     "type": "Library",
     "id": "https://awesome.music/federation/music/libraries/dc702491-f6ce-441b-9da0-cecbed08bcc6",
-    "actor": "https://awesome.music/federation/actors/MyNameIsTroll",
+    "attributedTo": "https://awesome.music/federation/actors/Alice",
     "name": "My awesome library",
     "followers": "https://awesome.music/federation/music/libraries/dc702491-f6ce-441b-9da0-cecbed08bcc6/followers",
     "summary": "This library is for restricted use only",