1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Web.ActivityPub.ActivityPub do
7 alias Pleroma.Instances
8 alias Pleroma.Notification
13 alias Pleroma.Web.ActivityPub.MRF
14 alias Pleroma.Web.ActivityPub.Transmogrifier
15 alias Pleroma.Web.Federator
16 alias Pleroma.Web.OStatus
17 alias Pleroma.Web.WebFinger
20 import Pleroma.Web.ActivityPub.Utils
21 import Pleroma.Web.ActivityPub.Visibility
25 @httpoison Application.get_env(:pleroma, :httpoison)
27 # For Announce activities, we filter the recipients based on following status for any actors
28 # that match actual users. See issue #164 for more information about why this is necessary.
29 defp get_recipients(%{"type" => "Announce"} = data) do
32 actor = User.get_cached_by_ap_id(data["actor"])
36 |> Enum.filter(fn recipient ->
37 case User.get_cached_by_ap_id(recipient) do
42 User.following?(user, actor)
49 defp get_recipients(%{"type" => "Create"} = data) do
52 actor = data["actor"] || []
53 recipients = (to ++ cc ++ [actor]) |> Enum.uniq()
57 defp get_recipients(data) do
64 defp check_actor_is_active(actor) do
65 if not is_nil(actor) do
66 with user <- User.get_cached_by_ap_id(actor),
67 false <- user.info.deactivated do
77 defp check_remote_limit(%{"object" => %{"content" => content}}) when not is_nil(content) do
78 limit = Pleroma.Config.get([:instance, :remote_limit])
79 String.length(content) <= limit
82 defp check_remote_limit(_), do: true
84 def increase_note_count_if_public(actor, object) do
85 if is_public?(object), do: User.increase_note_count(actor), else: {:ok, actor}
88 def decrease_note_count_if_public(actor, object) do
89 if is_public?(object), do: User.decrease_note_count(actor), else: {:ok, actor}
92 def insert(map, local \\ true) when is_map(map) do
93 with nil <- Activity.normalize(map),
94 map <- lazy_put_activity_defaults(map),
95 :ok <- check_actor_is_active(map["actor"]),
96 {_, true} <- {:remote_limit_error, check_remote_limit(map)},
97 {:ok, map} <- MRF.filter(map),
98 {:ok, object} <- insert_full_object(map) do
99 {recipients, _, _} = get_recipients(map)
102 Repo.insert(%Activity{
106 recipients: recipients
109 # Splice in the child object if we have one.
111 if !is_nil(object) do
112 Map.put(activity, :object, object)
118 Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity)
121 Notification.create_notifications(activity)
125 %Activity{} = activity -> {:ok, activity}
126 error -> {:error, error}
130 def stream_out(activity) do
131 public = "https://www.w3.org/ns/activitystreams#Public"
133 if activity.data["type"] in ["Create", "Announce", "Delete"] do
134 Pleroma.Web.Streamer.stream("user", activity)
135 Pleroma.Web.Streamer.stream("list", activity)
137 if Enum.member?(activity.data["to"], public) do
138 Pleroma.Web.Streamer.stream("public", activity)
141 Pleroma.Web.Streamer.stream("public:local", activity)
144 if activity.data["type"] in ["Create"] do
145 activity.data["object"]
146 |> Map.get("tag", [])
147 |> Enum.filter(fn tag -> is_bitstring(tag) end)
148 |> Enum.each(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
150 if activity.data["object"]["attachment"] != [] do
151 Pleroma.Web.Streamer.stream("public:media", activity)
154 Pleroma.Web.Streamer.stream("public:local:media", activity)
159 if !Enum.member?(activity.data["cc"] || [], public) &&
162 User.get_by_ap_id(activity.data["actor"]).follower_address
164 do: Pleroma.Web.Streamer.stream("direct", activity)
169 def create(%{to: to, actor: actor, context: context, object: object} = params) do
170 additional = params[:additional] || %{}
171 # only accept false as false value
172 local = !(params[:local] == false)
173 published = params[:published]
177 %{to: to, actor: actor, published: published, context: context, object: object},
180 {:ok, activity} <- insert(create_data, local),
181 # Changing note count prior to enqueuing federation task in order to avoid
182 # race conditions on updating user.info
183 {:ok, _actor} <- increase_note_count_if_public(actor, activity),
184 :ok <- maybe_federate(activity) do
189 def accept(%{to: to, actor: actor, object: object} = params) do
190 # only accept false as false value
191 local = !(params[:local] == false)
193 with data <- %{"to" => to, "type" => "Accept", "actor" => actor.ap_id, "object" => object},
194 {:ok, activity} <- insert(data, local),
195 :ok <- maybe_federate(activity) do
200 def reject(%{to: to, actor: actor, object: object} = params) do
201 # only accept false as false value
202 local = !(params[:local] == false)
204 with data <- %{"to" => to, "type" => "Reject", "actor" => actor.ap_id, "object" => object},
205 {:ok, activity} <- insert(data, local),
206 :ok <- maybe_federate(activity) do
211 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
212 # only accept false as false value
213 local = !(params[:local] == false)
222 {:ok, activity} <- insert(data, local),
223 :ok <- maybe_federate(activity) do
228 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
230 %User{ap_id: ap_id} = user,
231 %Object{data: %{"id" => _}} = object,
235 with nil <- get_existing_like(ap_id, object),
236 like_data <- make_like_data(user, object, activity_id),
237 {:ok, activity} <- insert(like_data, local),
238 {:ok, object} <- add_like_to_object(activity, object),
239 :ok <- maybe_federate(activity) do
240 {:ok, activity, object}
242 %Activity{} = activity -> {:ok, activity, object}
243 error -> {:error, error}
253 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
254 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
255 {:ok, unlike_activity} <- insert(unlike_data, local),
256 {:ok, _activity} <- Repo.delete(like_activity),
257 {:ok, object} <- remove_like_from_object(like_activity, object),
258 :ok <- maybe_federate(unlike_activity) do
259 {:ok, unlike_activity, like_activity, object}
266 %User{ap_id: _} = user,
267 %Object{data: %{"id" => _}} = object,
272 with true <- is_public?(object),
273 announce_data <- make_announce_data(user, object, activity_id, public),
274 {:ok, activity} <- insert(announce_data, local),
275 {:ok, object} <- add_announce_to_object(activity, object),
276 :ok <- maybe_federate(activity) do
277 {:ok, activity, object}
279 error -> {:error, error}
289 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
290 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
291 {:ok, unannounce_activity} <- insert(unannounce_data, local),
292 :ok <- maybe_federate(unannounce_activity),
293 {:ok, _activity} <- Repo.delete(announce_activity),
294 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
295 {:ok, unannounce_activity, object}
301 def follow(follower, followed, activity_id \\ nil, local \\ true) do
302 with data <- make_follow_data(follower, followed, activity_id),
303 {:ok, activity} <- insert(data, local),
304 :ok <- maybe_federate(activity) do
309 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
310 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
311 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
312 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
313 {:ok, activity} <- insert(unfollow_data, local),
314 :ok <- maybe_federate(activity) do
319 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
320 user = User.get_cached_by_ap_id(actor)
321 to = (object.data["to"] || []) ++ (object.data["cc"] || [])
323 with {:ok, object, activity} <- Object.delete(object),
329 "deleted_activity_id" => activity && activity.id
331 {:ok, activity} <- insert(data, local),
332 # Changing note count prior to enqueuing federation task in order to avoid
333 # race conditions on updating user.info
334 {:ok, _actor} <- decrease_note_count_if_public(user, object),
335 :ok <- maybe_federate(activity) do
340 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
341 ap_config = Application.get_env(:pleroma, :activitypub)
342 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
343 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
345 with true <- unfollow_blocked do
346 follow_activity = fetch_latest_follow(blocker, blocked)
348 if follow_activity do
349 unfollow(blocker, blocked, nil, local)
353 with true <- outgoing_blocks,
354 block_data <- make_block_data(blocker, blocked, activity_id),
355 {:ok, activity} <- insert(block_data, local),
356 :ok <- maybe_federate(activity) do
363 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
364 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
365 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
366 {:ok, activity} <- insert(unblock_data, local),
367 :ok <- maybe_federate(activity) do
381 # only accept false as false value
382 local = !(params[:local] == false)
383 forward = !(params[:forward] == false)
385 additional = params[:additional] || %{}
397 Map.merge(additional, %{"to" => [], "cc" => [account.ap_id]})
399 Map.merge(additional, %{"to" => [], "cc" => []})
402 with flag_data <- make_flag_data(params, additional),
403 {:ok, activity} <- insert(flag_data, local),
404 :ok <- maybe_federate(activity) do
405 Enum.each(User.all_superusers(), fn superuser ->
407 |> Pleroma.AdminEmail.report(actor, account, statuses, content)
408 |> Pleroma.Mailer.deliver_async()
415 def fetch_activities_for_context(context, opts \\ %{}) do
416 public = ["https://www.w3.org/ns/activitystreams#Public"]
419 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
421 query = from(activity in Activity)
425 |> restrict_blocked(opts)
426 |> restrict_recipients(recipients, opts["user"])
433 "?->>'type' = ? and ?->>'context' = ?",
439 order_by: [desc: :id]
445 def fetch_public_activities(opts \\ %{}) do
446 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
449 |> restrict_unlisted()
454 @valid_visibilities ~w[direct unlisted public private]
456 defp restrict_visibility(query, %{visibility: visibility})
457 when is_list(visibility) do
458 if Enum.all?(visibility, &(&1 in @valid_visibilities)) do
464 "activity_visibility(?, ?, ?) = ANY (?)",
472 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
476 Logger.error("Could not restrict visibility to #{visibility}")
480 defp restrict_visibility(query, %{visibility: visibility})
481 when visibility in @valid_visibilities do
486 fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
489 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
494 defp restrict_visibility(_query, %{visibility: visibility})
495 when visibility not in @valid_visibilities do
496 Logger.error("Could not restrict visibility to #{visibility}")
499 defp restrict_visibility(query, _visibility), do: query
501 def fetch_user_activities(user, reading_user, params \\ %{}) do
504 |> Map.put("type", ["Create", "Announce"])
505 |> Map.put("actor_id", user.ap_id)
506 |> Map.put("whole_db", true)
507 |> Map.put("pinned_activity_ids", user.info.pinned_activities)
511 ["https://www.w3.org/ns/activitystreams#Public"] ++
512 [reading_user.ap_id | reading_user.following]
514 ["https://www.w3.org/ns/activitystreams#Public"]
517 fetch_activities(recipients, params)
521 defp restrict_since(query, %{"since_id" => ""}), do: query
523 defp restrict_since(query, %{"since_id" => since_id}) do
524 from(activity in query, where: activity.id > ^since_id)
527 defp restrict_since(query, _), do: query
529 defp restrict_tag_reject(query, %{"tag_reject" => tag_reject})
530 when is_list(tag_reject) and tag_reject != [] do
533 where: fragment(~s(\(not \(? #> '{"object","tag"}'\) \\?| ?\)), activity.data, ^tag_reject)
537 defp restrict_tag_reject(query, _), do: query
539 defp restrict_tag_all(query, %{"tag_all" => tag_all})
540 when is_list(tag_all) and tag_all != [] do
543 where: fragment(~s(\(? #> '{"object","tag"}'\) \\?& ?), activity.data, ^tag_all)
547 defp restrict_tag_all(query, _), do: query
549 defp restrict_tag(query, %{"tag" => tag}) when is_list(tag) do
552 where: fragment(~s(\(? #> '{"object","tag"}'\) \\?| ?), activity.data, ^tag)
556 defp restrict_tag(query, %{"tag" => tag}) when is_binary(tag) do
559 where: fragment(~s(? <@ (? #> '{"object","tag"}'\)), ^tag, activity.data)
563 defp restrict_tag(query, _), do: query
565 defp restrict_to_cc(query, recipients_to, recipients_cc) do
570 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
579 defp restrict_recipients(query, [], _user), do: query
581 defp restrict_recipients(query, recipients, nil) do
582 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
585 defp restrict_recipients(query, recipients, user) do
588 where: fragment("? && ?", ^recipients, activity.recipients),
589 or_where: activity.actor == ^user.ap_id
593 defp restrict_limit(query, %{"limit" => limit}) do
594 from(activity in query, limit: ^limit)
597 defp restrict_limit(query, _), do: query
599 defp restrict_local(query, %{"local_only" => true}) do
600 from(activity in query, where: activity.local == true)
603 defp restrict_local(query, _), do: query
605 defp restrict_max(query, %{"max_id" => ""}), do: query
607 defp restrict_max(query, %{"max_id" => max_id}) do
608 from(activity in query, where: activity.id < ^max_id)
611 defp restrict_max(query, _), do: query
613 defp restrict_actor(query, %{"actor_id" => actor_id}) do
614 from(activity in query, where: activity.actor == ^actor_id)
617 defp restrict_actor(query, _), do: query
619 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
620 from(activity in query, where: fragment("?->>'type' = ?", activity.data, ^type))
623 defp restrict_type(query, %{"type" => type}) do
624 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
627 defp restrict_type(query, _), do: query
629 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
632 where: fragment(~s(? <@ (? #> '{"object","likes"}'\)), ^ap_id, activity.data)
636 defp restrict_favorited_by(query, _), do: query
638 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
641 where: fragment(~s(not (? #> '{"object","attachment"}' = ?\)), activity.data, ^[])
645 defp restrict_media(query, _), do: query
647 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
650 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
654 defp restrict_replies(query, _), do: query
656 defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
657 from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
660 defp restrict_reblogs(query, _), do: query
662 defp restrict_muted(query, %{"with_muted" => val}) when val in [true, "true", "1"], do: query
664 defp restrict_muted(query, %{"muting_user" => %User{info: info}}) do
669 where: fragment("not (? = ANY(?))", activity.actor, ^mutes),
670 where: fragment("not (?->'to' \\?| ?)", activity.data, ^mutes)
674 defp restrict_muted(query, _), do: query
676 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
677 blocks = info.blocks || []
678 domain_blocks = info.domain_blocks || []
682 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
683 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
684 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
688 defp restrict_blocked(query, _), do: query
690 defp restrict_unlisted(query) do
695 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
697 ^["https://www.w3.org/ns/activitystreams#Public"]
702 defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
703 from(activity in query, where: activity.id in ^ids)
706 defp restrict_pinned(query, _), do: query
708 defp restrict_muted_reblogs(query, %{"muting_user" => %User{info: info}}) do
709 muted_reblogs = info.muted_reblogs || []
713 where: fragment("not ?->>'type' = 'Announce'", activity.data),
714 where: fragment("not ? = ANY(?)", activity.actor, ^muted_reblogs)
718 defp restrict_muted_reblogs(query, _), do: query
720 def fetch_activities_query(recipients, opts \\ %{}) do
723 activity in Activity,
725 order_by: [fragment("? desc nulls last", activity.id)]
727 |> Activity.with_preloaded_object()
730 |> restrict_recipients(recipients, opts["user"])
731 |> restrict_tag(opts)
732 |> restrict_tag_reject(opts)
733 |> restrict_tag_all(opts)
734 |> restrict_since(opts)
735 |> restrict_local(opts)
736 |> restrict_limit(opts)
737 |> restrict_max(opts)
738 |> restrict_actor(opts)
739 |> restrict_type(opts)
740 |> restrict_favorited_by(opts)
741 |> restrict_blocked(opts)
742 |> restrict_muted(opts)
743 |> restrict_media(opts)
744 |> restrict_visibility(opts)
745 |> restrict_replies(opts)
746 |> restrict_reblogs(opts)
747 |> restrict_pinned(opts)
748 |> restrict_muted_reblogs(opts)
751 def fetch_activities(recipients, opts \\ %{}) do
752 fetch_activities_query(recipients, opts)
757 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
758 fetch_activities_query([], opts)
759 |> restrict_to_cc(recipients_to, recipients_cc)
764 def upload(file, opts \\ []) do
765 with {:ok, data} <- Upload.store(file, opts) do
768 Map.put(data, "actor", opts[:actor])
773 Repo.insert(%Object{data: obj_data})
777 def user_data_from_user_object(data) do
779 data["icon"]["url"] &&
782 "url" => [%{"href" => data["icon"]["url"]}]
786 data["image"]["url"] &&
789 "url" => [%{"href" => data["image"]["url"]}]
792 locked = data["manuallyApprovesFollowers"] || false
793 data = Transmogrifier.maybe_fix_user_object(data)
798 "ap_enabled" => true,
799 "source_data" => data,
805 follower_address: data["followers"],
809 # nickname can be nil because of virtual actors
811 if data["preferredUsername"] do
815 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
818 Map.put(user_data, :nickname, nil)
824 def fetch_and_prepare_user_from_ap_id(ap_id) do
825 with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
826 user_data_from_user_object(data)
828 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
832 def make_user_from_ap_id(ap_id) do
833 if _user = User.get_by_ap_id(ap_id) do
834 Transmogrifier.upgrade_user_from_ap_id(ap_id)
836 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
837 User.insert_or_update_user(data)
844 def make_user_from_nickname(nickname) do
845 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
846 make_user_from_ap_id(ap_id)
848 _e -> {:error, "No AP id in WebFinger"}
852 def should_federate?(inbox, public) do
856 inbox_info = URI.parse(inbox)
857 !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
861 def publish(actor, activity) do
863 if actor.follower_address in activity.recipients do
864 {:ok, followers} = User.get_followers(actor)
865 followers |> Enum.filter(&(!&1.local))
870 public = is_public?(activity)
872 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
873 json = Jason.encode!(data)
875 (Pleroma.Web.Salmon.remote_users(activity) ++ remote_followers)
876 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
877 |> Enum.map(fn %{info: %{source_data: data}} ->
878 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
881 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
882 |> Instances.filter_reachable()
883 |> Enum.each(fn {inbox, unreachable_since} ->
884 Federator.publish_single_ap(%{
888 id: activity.data["id"],
889 unreachable_since: unreachable_since
894 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id} = params) do
895 Logger.info("Federating #{id} to #{inbox}")
896 host = URI.parse(inbox).host
898 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
901 NaiveDateTime.utc_now()
902 |> Timex.format!("{WDshort}, {0D} {Mshort} {YYYY} {h24}:{m}:{s} GMT")
905 Pleroma.Web.HTTPSignatures.sign(actor, %{
907 "content-length": byte_size(json),
912 with {:ok, %{status: code}} when code in 200..299 <-
918 {"Content-Type", "application/activity+json"},
920 {"signature", signature},
924 if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
925 do: Instances.set_reachable(inbox)
929 {_post_result, response} ->
930 unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
936 # This will create a Create activity, which we need internally at the moment.
937 def fetch_object_from_id(id) do
938 if object = Object.get_cached_by_ap_id(id) do
941 with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
942 nil <- Object.normalize(data),
947 "actor" => data["actor"] || data["attributedTo"],
950 :ok <- Transmogrifier.contain_origin(id, params),
951 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
952 {:ok, Object.normalize(activity.data["object"])}
954 {:error, {:reject, nil}} ->
957 object = %Object{} ->
961 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
963 case OStatus.fetch_activity_from_url(id) do
964 {:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
971 def fetch_and_contain_remote_object_from_id(id) do
972 Logger.info("Fetching object #{id} via AP")
974 with true <- String.starts_with?(id, "http"),
975 {:ok, %{body: body, status: code}} when code in 200..299 <-
978 [{:Accept, "application/activity+json"}]
980 {:ok, data} <- Jason.decode(body),
981 :ok <- Transmogrifier.contain_origin_from_id(id, data) do
989 # filter out broken threads
990 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
991 entire_thread_visible_for_user?(activity, user)
994 # do post-processing on a specific activity
995 def contain_activity(%Activity{} = activity, %User{} = user) do
996 contain_broken_threads(activity, user)
999 # do post-processing on a timeline
1000 def contain_timeline(timeline, user) do
1002 |> Enum.filter(fn activity ->
1003 contain_activity(activity, user)