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 <- insert_full_object(map) do
99 {recipients, _, _} = get_recipients(map)
102 Repo.insert(%Activity{
106 recipients: recipients
110 Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity)
113 Notification.create_notifications(activity)
117 %Activity{} = activity -> {:ok, activity}
118 error -> {:error, error}
122 def stream_out(activity) do
123 public = "https://www.w3.org/ns/activitystreams#Public"
125 if activity.data["type"] in ["Create", "Announce", "Delete"] do
126 Pleroma.Web.Streamer.stream("user", activity)
127 Pleroma.Web.Streamer.stream("list", activity)
129 if Enum.member?(activity.data["to"], public) do
130 Pleroma.Web.Streamer.stream("public", activity)
133 Pleroma.Web.Streamer.stream("public:local", activity)
136 if activity.data["type"] in ["Create"] do
137 activity.data["object"]
138 |> Map.get("tag", [])
139 |> Enum.filter(fn tag -> is_bitstring(tag) end)
140 |> Enum.each(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
142 if activity.data["object"]["attachment"] != [] do
143 Pleroma.Web.Streamer.stream("public:media", activity)
146 Pleroma.Web.Streamer.stream("public:local:media", activity)
151 if !Enum.member?(activity.data["cc"] || [], public) &&
154 User.get_by_ap_id(activity.data["actor"]).follower_address
156 do: Pleroma.Web.Streamer.stream("direct", activity)
161 def create(%{to: to, actor: actor, context: context, object: object} = params) do
162 additional = params[:additional] || %{}
163 # only accept false as false value
164 local = !(params[:local] == false)
165 published = params[:published]
169 %{to: to, actor: actor, published: published, context: context, object: object},
172 {:ok, activity} <- insert(create_data, local),
173 # Changing note count prior to enqueuing federation task in order to avoid
174 # race conditions on updating user.info
175 {:ok, _actor} <- increase_note_count_if_public(actor, activity),
176 :ok <- maybe_federate(activity) do
181 def accept(%{to: to, actor: actor, object: object} = params) do
182 # only accept false as false value
183 local = !(params[:local] == false)
185 with data <- %{"to" => to, "type" => "Accept", "actor" => actor.ap_id, "object" => object},
186 {:ok, activity} <- insert(data, local),
187 :ok <- maybe_federate(activity) do
192 def reject(%{to: to, actor: actor, object: object} = params) do
193 # only accept false as false value
194 local = !(params[:local] == false)
196 with data <- %{"to" => to, "type" => "Reject", "actor" => actor.ap_id, "object" => object},
197 {:ok, activity} <- insert(data, local),
198 :ok <- maybe_federate(activity) do
203 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
204 # only accept false as false value
205 local = !(params[:local] == false)
214 {:ok, activity} <- insert(data, local),
215 :ok <- maybe_federate(activity) do
220 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
222 %User{ap_id: ap_id} = user,
223 %Object{data: %{"id" => _}} = object,
227 with nil <- get_existing_like(ap_id, object),
228 like_data <- make_like_data(user, object, activity_id),
229 {:ok, activity} <- insert(like_data, local),
230 {:ok, object} <- add_like_to_object(activity, object),
231 :ok <- maybe_federate(activity) do
232 {:ok, activity, object}
234 %Activity{} = activity -> {:ok, activity, object}
235 error -> {:error, error}
245 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
246 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
247 {:ok, unlike_activity} <- insert(unlike_data, local),
248 {:ok, _activity} <- Repo.delete(like_activity),
249 {:ok, object} <- remove_like_from_object(like_activity, object),
250 :ok <- maybe_federate(unlike_activity) do
251 {:ok, unlike_activity, like_activity, object}
258 %User{ap_id: _} = user,
259 %Object{data: %{"id" => _}} = object,
264 with true <- is_public?(object),
265 announce_data <- make_announce_data(user, object, activity_id, public),
266 {:ok, activity} <- insert(announce_data, local),
267 {:ok, object} <- add_announce_to_object(activity, object),
268 :ok <- maybe_federate(activity) do
269 {:ok, activity, object}
271 error -> {:error, error}
281 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
282 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
283 {:ok, unannounce_activity} <- insert(unannounce_data, local),
284 :ok <- maybe_federate(unannounce_activity),
285 {:ok, _activity} <- Repo.delete(announce_activity),
286 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
287 {:ok, unannounce_activity, object}
293 def follow(follower, followed, activity_id \\ nil, local \\ true) do
294 with data <- make_follow_data(follower, followed, activity_id),
295 {:ok, activity} <- insert(data, local),
296 :ok <- maybe_federate(activity) do
301 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
302 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
303 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
304 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
305 {:ok, activity} <- insert(unfollow_data, local),
306 :ok <- maybe_federate(activity) do
311 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
312 user = User.get_cached_by_ap_id(actor)
313 to = (object.data["to"] || []) ++ (object.data["cc"] || [])
315 with {:ok, object, activity} <- Object.delete(object),
321 "deleted_activity_id" => activity && activity.id
323 {:ok, activity} <- insert(data, local),
324 # Changing note count prior to enqueuing federation task in order to avoid
325 # race conditions on updating user.info
326 {:ok, _actor} <- decrease_note_count_if_public(user, object),
327 :ok <- maybe_federate(activity) do
332 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
333 ap_config = Application.get_env(:pleroma, :activitypub)
334 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
335 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
337 with true <- unfollow_blocked do
338 follow_activity = fetch_latest_follow(blocker, blocked)
340 if follow_activity do
341 unfollow(blocker, blocked, nil, local)
345 with true <- outgoing_blocks,
346 block_data <- make_block_data(blocker, blocked, activity_id),
347 {:ok, activity} <- insert(block_data, local),
348 :ok <- maybe_federate(activity) do
355 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
356 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
357 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
358 {:ok, activity} <- insert(unblock_data, local),
359 :ok <- maybe_federate(activity) do
373 additional = params[:additional] || %{}
375 # only accept false as false value
376 local = !(params[:local] == false)
385 |> make_flag_data(additional)
389 def fetch_activities_for_context(context, opts \\ %{}) do
390 public = ["https://www.w3.org/ns/activitystreams#Public"]
393 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
395 query = from(activity in Activity)
399 |> restrict_blocked(opts)
400 |> restrict_recipients(recipients, opts["user"])
407 "?->>'type' = ? and ?->>'context' = ?",
413 order_by: [desc: :id]
419 def fetch_public_activities(opts \\ %{}) do
420 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
423 |> restrict_unlisted()
428 @valid_visibilities ~w[direct unlisted public private]
430 defp restrict_visibility(query, %{visibility: visibility})
431 when is_list(visibility) do
432 if Enum.all?(visibility, &(&1 in @valid_visibilities)) do
438 "activity_visibility(?, ?, ?) = ANY (?)",
446 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
450 Logger.error("Could not restrict visibility to #{visibility}")
454 defp restrict_visibility(query, %{visibility: visibility})
455 when visibility in @valid_visibilities do
460 fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
463 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
468 defp restrict_visibility(_query, %{visibility: visibility})
469 when visibility not in @valid_visibilities do
470 Logger.error("Could not restrict visibility to #{visibility}")
473 defp restrict_visibility(query, _visibility), do: query
475 def fetch_user_activities(user, reading_user, params \\ %{}) do
478 |> Map.put("type", ["Create", "Announce"])
479 |> Map.put("actor_id", user.ap_id)
480 |> Map.put("whole_db", true)
481 |> Map.put("pinned_activity_ids", user.info.pinned_activities)
485 ["https://www.w3.org/ns/activitystreams#Public"] ++
486 [reading_user.ap_id | reading_user.following]
488 ["https://www.w3.org/ns/activitystreams#Public"]
491 fetch_activities(recipients, params)
495 defp restrict_since(query, %{"since_id" => ""}), do: query
497 defp restrict_since(query, %{"since_id" => since_id}) do
498 from(activity in query, where: activity.id > ^since_id)
501 defp restrict_since(query, _), do: query
503 defp restrict_tag_reject(query, %{"tag_reject" => tag_reject})
504 when is_list(tag_reject) and tag_reject != [] do
507 where: fragment(~s(\(not \(? #> '{"object","tag"}'\) \\?| ?\)), activity.data, ^tag_reject)
511 defp restrict_tag_reject(query, _), do: query
513 defp restrict_tag_all(query, %{"tag_all" => tag_all})
514 when is_list(tag_all) and tag_all != [] do
517 where: fragment(~s(\(? #> '{"object","tag"}'\) \\?& ?), activity.data, ^tag_all)
521 defp restrict_tag_all(query, _), do: query
523 defp restrict_tag(query, %{"tag" => tag}) when is_list(tag) do
526 where: fragment(~s(\(? #> '{"object","tag"}'\) \\?| ?), activity.data, ^tag)
530 defp restrict_tag(query, %{"tag" => tag}) when is_binary(tag) do
533 where: fragment(~s(? <@ (? #> '{"object","tag"}'\)), ^tag, activity.data)
537 defp restrict_tag(query, _), do: query
539 defp restrict_to_cc(query, recipients_to, recipients_cc) do
544 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
553 defp restrict_recipients(query, [], _user), do: query
555 defp restrict_recipients(query, recipients, nil) do
556 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
559 defp restrict_recipients(query, recipients, user) do
562 where: fragment("? && ?", ^recipients, activity.recipients),
563 or_where: activity.actor == ^user.ap_id
567 defp restrict_limit(query, %{"limit" => limit}) do
568 from(activity in query, limit: ^limit)
571 defp restrict_limit(query, _), do: query
573 defp restrict_local(query, %{"local_only" => true}) do
574 from(activity in query, where: activity.local == true)
577 defp restrict_local(query, _), do: query
579 defp restrict_max(query, %{"max_id" => ""}), do: query
581 defp restrict_max(query, %{"max_id" => max_id}) do
582 from(activity in query, where: activity.id < ^max_id)
585 defp restrict_max(query, _), do: query
587 defp restrict_actor(query, %{"actor_id" => actor_id}) do
588 from(activity in query, where: activity.actor == ^actor_id)
591 defp restrict_actor(query, _), do: query
593 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
594 from(activity in query, where: fragment("?->>'type' = ?", activity.data, ^type))
597 defp restrict_type(query, %{"type" => type}) do
598 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
601 defp restrict_type(query, _), do: query
603 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
606 where: fragment(~s(? <@ (? #> '{"object","likes"}'\)), ^ap_id, activity.data)
610 defp restrict_favorited_by(query, _), do: query
612 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
615 where: fragment(~s(not (? #> '{"object","attachment"}' = ?\)), activity.data, ^[])
619 defp restrict_media(query, _), do: query
621 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
624 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
628 defp restrict_replies(query, _), do: query
630 defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
631 from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
634 defp restrict_reblogs(query, _), do: query
636 defp restrict_muted(query, %{"with_muted" => val}) when val in [true, "true", "1"], do: query
638 defp restrict_muted(query, %{"muting_user" => %User{info: info}}) do
643 where: fragment("not (? = ANY(?))", activity.actor, ^mutes),
644 where: fragment("not (?->'to' \\?| ?)", activity.data, ^mutes)
648 defp restrict_muted(query, _), do: query
650 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
651 blocks = info.blocks || []
652 domain_blocks = info.domain_blocks || []
656 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
657 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
658 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
662 defp restrict_blocked(query, _), do: query
664 defp restrict_unlisted(query) do
669 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
671 ^["https://www.w3.org/ns/activitystreams#Public"]
676 defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
677 from(activity in query, where: activity.id in ^ids)
680 defp restrict_pinned(query, _), do: query
682 def fetch_activities_query(recipients, opts \\ %{}) do
685 activity in Activity,
687 order_by: [fragment("? desc nulls last", activity.id)]
691 |> restrict_recipients(recipients, opts["user"])
692 |> restrict_tag(opts)
693 |> restrict_tag_reject(opts)
694 |> restrict_tag_all(opts)
695 |> restrict_since(opts)
696 |> restrict_local(opts)
697 |> restrict_limit(opts)
698 |> restrict_max(opts)
699 |> restrict_actor(opts)
700 |> restrict_type(opts)
701 |> restrict_favorited_by(opts)
702 |> restrict_blocked(opts)
703 |> restrict_muted(opts)
704 |> restrict_media(opts)
705 |> restrict_visibility(opts)
706 |> restrict_replies(opts)
707 |> restrict_reblogs(opts)
708 |> restrict_pinned(opts)
711 def fetch_activities(recipients, opts \\ %{}) do
712 fetch_activities_query(recipients, opts)
717 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
718 fetch_activities_query([], opts)
719 |> restrict_to_cc(recipients_to, recipients_cc)
724 def upload(file, opts \\ []) do
725 with {:ok, data} <- Upload.store(file, opts) do
728 Map.put(data, "actor", opts[:actor])
733 Repo.insert(%Object{data: obj_data})
737 def user_data_from_user_object(data) do
739 data["icon"]["url"] &&
742 "url" => [%{"href" => data["icon"]["url"]}]
746 data["image"]["url"] &&
749 "url" => [%{"href" => data["image"]["url"]}]
752 locked = data["manuallyApprovesFollowers"] || false
753 data = Transmogrifier.maybe_fix_user_object(data)
758 "ap_enabled" => true,
759 "source_data" => data,
765 follower_address: data["followers"],
769 # nickname can be nil because of virtual actors
771 if data["preferredUsername"] do
775 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
778 Map.put(user_data, :nickname, nil)
784 def fetch_and_prepare_user_from_ap_id(ap_id) do
785 with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
786 user_data_from_user_object(data)
788 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
792 def make_user_from_ap_id(ap_id) do
793 if _user = User.get_by_ap_id(ap_id) do
794 Transmogrifier.upgrade_user_from_ap_id(ap_id)
796 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
797 User.insert_or_update_user(data)
804 def make_user_from_nickname(nickname) do
805 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
806 make_user_from_ap_id(ap_id)
808 _e -> {:error, "No AP id in WebFinger"}
812 def should_federate?(inbox, public) do
816 inbox_info = URI.parse(inbox)
817 !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
821 def publish(actor, activity) do
823 if actor.follower_address in activity.recipients do
824 {:ok, followers} = User.get_followers(actor)
825 followers |> Enum.filter(&(!&1.local))
830 public = is_public?(activity)
832 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
833 json = Jason.encode!(data)
835 (Pleroma.Web.Salmon.remote_users(activity) ++ remote_followers)
836 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
837 |> Enum.map(fn %{info: %{source_data: data}} ->
838 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
841 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
842 |> Instances.filter_reachable()
843 |> Enum.each(fn {inbox, unreachable_since} ->
844 Federator.publish_single_ap(%{
848 id: activity.data["id"],
849 unreachable_since: unreachable_since
854 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id} = params) do
855 Logger.info("Federating #{id} to #{inbox}")
856 host = URI.parse(inbox).host
858 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
861 NaiveDateTime.utc_now()
862 |> Timex.format!("{WDshort}, {0D} {Mshort} {YYYY} {h24}:{m}:{s} GMT")
865 Pleroma.Web.HTTPSignatures.sign(actor, %{
867 "content-length": byte_size(json),
872 with {:ok, %{status: code}} when code in 200..299 <-
878 {"Content-Type", "application/activity+json"},
880 {"signature", signature},
884 if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
885 do: Instances.set_reachable(inbox)
889 {_post_result, response} ->
890 unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
896 # This will create a Create activity, which we need internally at the moment.
897 def fetch_object_from_id(id) do
898 if object = Object.get_cached_by_ap_id(id) do
901 with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
902 nil <- Object.normalize(data),
907 "actor" => data["actor"] || data["attributedTo"],
910 :ok <- Transmogrifier.contain_origin(id, params),
911 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
912 {:ok, Object.normalize(activity.data["object"])}
914 {:error, {:reject, nil}} ->
917 object = %Object{} ->
921 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
923 case OStatus.fetch_activity_from_url(id) do
924 {:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
931 def fetch_and_contain_remote_object_from_id(id) do
932 Logger.info("Fetching object #{id} via AP")
934 with true <- String.starts_with?(id, "http"),
935 {:ok, %{body: body, status: code}} when code in 200..299 <-
938 [{:Accept, "application/activity+json"}]
940 {:ok, data} <- Jason.decode(body),
941 :ok <- Transmogrifier.contain_origin_from_id(id, data) do
949 # filter out broken threads
950 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
951 entire_thread_visible_for_user?(activity, user)
954 # do post-processing on a specific activity
955 def contain_activity(%Activity{} = activity, %User{} = user) do
956 contain_broken_threads(activity, user)
959 # do post-processing on a timeline
960 def contain_timeline(timeline, user) do
962 |> Enum.filter(fn activity ->
963 contain_activity(activity, user)