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
11 alias Pleroma.Notification
12 alias Pleroma.Instances
13 alias Pleroma.Web.ActivityPub.Transmogrifier
14 alias Pleroma.Web.ActivityPub.MRF
15 alias Pleroma.Web.WebFinger
16 alias Pleroma.Web.Federator
17 alias Pleroma.Web.OStatus
20 import Pleroma.Web.ActivityPub.Utils
24 @httpoison Application.get_env(:pleroma, :httpoison)
26 # For Announce activities, we filter the recipients based on following status for any actors
27 # that match actual users. See issue #164 for more information about why this is necessary.
28 defp get_recipients(%{"type" => "Announce"} = data) do
31 actor = User.get_cached_by_ap_id(data["actor"])
35 |> Enum.filter(fn recipient ->
36 case User.get_cached_by_ap_id(recipient) do
41 User.following?(user, actor)
48 defp get_recipients(%{"type" => "Create"} = data) do
51 actor = data["actor"] || []
52 recipients = (to ++ cc ++ [actor]) |> Enum.uniq()
56 defp get_recipients(data) do
63 defp check_actor_is_active(actor) do
64 if not is_nil(actor) do
65 with user <- User.get_cached_by_ap_id(actor),
66 false <- user.info.deactivated do
76 defp check_remote_limit(%{"object" => %{"content" => content}}) when not is_nil(content) do
77 limit = Pleroma.Config.get([:instance, :remote_limit])
78 String.length(content) <= limit
81 defp check_remote_limit(_), do: true
83 def insert(map, local \\ true) when is_map(map) do
84 with nil <- Activity.normalize(map),
85 map <- lazy_put_activity_defaults(map),
86 :ok <- check_actor_is_active(map["actor"]),
87 {_, true} <- {:remote_limit_error, check_remote_limit(map)},
88 {:ok, map} <- MRF.filter(map),
89 :ok <- insert_full_object(map) do
90 {recipients, _, _} = get_recipients(map)
93 Repo.insert(%Activity{
97 recipients: recipients
101 Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity)
104 Notification.create_notifications(activity)
108 %Activity{} = activity -> {:ok, activity}
109 error -> {:error, error}
113 def stream_out(activity) do
114 public = "https://www.w3.org/ns/activitystreams#Public"
116 if activity.data["type"] in ["Create", "Announce", "Delete"] do
117 Pleroma.Web.Streamer.stream("user", activity)
118 Pleroma.Web.Streamer.stream("list", activity)
120 if Enum.member?(activity.data["to"], public) do
121 Pleroma.Web.Streamer.stream("public", activity)
124 Pleroma.Web.Streamer.stream("public:local", activity)
127 if activity.data["type"] in ["Create"] do
128 activity.data["object"]
129 |> Map.get("tag", [])
130 |> Enum.filter(fn tag -> is_bitstring(tag) end)
131 |> Enum.each(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
133 if activity.data["object"]["attachment"] != [] do
134 Pleroma.Web.Streamer.stream("public:media", activity)
137 Pleroma.Web.Streamer.stream("public:local:media", activity)
142 if !Enum.member?(activity.data["cc"] || [], public) &&
145 User.get_by_ap_id(activity.data["actor"]).follower_address
147 do: Pleroma.Web.Streamer.stream("direct", activity)
152 def create(%{to: to, actor: actor, context: context, object: object} = params) do
153 additional = params[:additional] || %{}
154 # only accept false as false value
155 local = !(params[:local] == false)
156 published = params[:published]
160 %{to: to, actor: actor, published: published, context: context, object: object},
163 {:ok, activity} <- insert(create_data, local),
164 # Changing note count prior to enqueuing federation task in order to avoid race conditions on updating user.info
165 {:ok, _actor} <- User.increase_note_count(actor),
166 :ok <- maybe_federate(activity) do
171 def accept(%{to: to, actor: actor, object: object} = params) do
172 # only accept false as false value
173 local = !(params[:local] == false)
175 with data <- %{"to" => to, "type" => "Accept", "actor" => actor.ap_id, "object" => object},
176 {:ok, activity} <- insert(data, local),
177 :ok <- maybe_federate(activity),
178 _ <- User.update_follow_request_count(actor) do
183 def reject(%{to: to, actor: actor, object: object} = params) do
184 # only accept false as false value
185 local = !(params[:local] == false)
187 with data <- %{"to" => to, "type" => "Reject", "actor" => actor.ap_id, "object" => object},
188 {:ok, activity} <- insert(data, local),
189 :ok <- maybe_federate(activity),
190 _ <- User.update_follow_request_count(actor) do
195 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
196 # only accept false as false value
197 local = !(params[:local] == false)
206 {:ok, activity} <- insert(data, local),
207 :ok <- maybe_federate(activity) do
212 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
214 %User{ap_id: ap_id} = user,
215 %Object{data: %{"id" => _}} = object,
219 with nil <- get_existing_like(ap_id, object),
220 like_data <- make_like_data(user, object, activity_id),
221 {:ok, activity} <- insert(like_data, local),
222 {:ok, object} <- add_like_to_object(activity, object),
223 :ok <- maybe_federate(activity) do
224 {:ok, activity, object}
226 %Activity{} = activity -> {:ok, activity, object}
227 error -> {:error, error}
237 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
238 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
239 {:ok, unlike_activity} <- insert(unlike_data, local),
240 {:ok, _activity} <- Repo.delete(like_activity),
241 {:ok, object} <- remove_like_from_object(like_activity, object),
242 :ok <- maybe_federate(unlike_activity) do
243 {:ok, unlike_activity, like_activity, object}
250 %User{ap_id: _} = user,
251 %Object{data: %{"id" => _}} = object,
256 with true <- is_public?(object),
257 announce_data <- make_announce_data(user, object, activity_id, public),
258 {:ok, activity} <- insert(announce_data, local),
259 {:ok, object} <- add_announce_to_object(activity, object),
260 :ok <- maybe_federate(activity) do
261 {:ok, activity, object}
263 error -> {:error, error}
273 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
274 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
275 {:ok, unannounce_activity} <- insert(unannounce_data, local),
276 :ok <- maybe_federate(unannounce_activity),
277 {:ok, _activity} <- Repo.delete(announce_activity),
278 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
279 {:ok, unannounce_activity, object}
285 def follow(follower, followed, activity_id \\ nil, local \\ true) do
286 with data <- make_follow_data(follower, followed, activity_id),
287 {:ok, activity} <- insert(data, local),
288 :ok <- maybe_federate(activity),
289 _ <- User.update_follow_request_count(followed) do
294 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
295 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
296 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
297 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
298 {:ok, activity} <- insert(unfollow_data, local),
299 :ok <- maybe_federate(activity),
300 _ <- User.update_follow_request_count(followed) do
305 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
306 user = User.get_cached_by_ap_id(actor)
312 "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
315 with {:ok, _} <- Object.delete(object),
316 {:ok, activity} <- insert(data, local),
317 # Changing note count prior to enqueuing federation task in order to avoid race conditions on updating user.info
318 {:ok, _actor} <- User.decrease_note_count(user),
319 :ok <- maybe_federate(activity) do
324 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
325 ap_config = Application.get_env(:pleroma, :activitypub)
326 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
327 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
329 with true <- unfollow_blocked do
330 follow_activity = fetch_latest_follow(blocker, blocked)
332 if follow_activity do
333 unfollow(blocker, blocked, nil, local)
337 with true <- outgoing_blocks,
338 block_data <- make_block_data(blocker, blocked, activity_id),
339 {:ok, activity} <- insert(block_data, local),
340 :ok <- maybe_federate(activity) do
347 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
348 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
349 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
350 {:ok, activity} <- insert(unblock_data, local),
351 :ok <- maybe_federate(activity) do
356 def fetch_activities_for_context(context, opts \\ %{}) do
357 public = ["https://www.w3.org/ns/activitystreams#Public"]
360 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
362 query = from(activity in Activity)
366 |> restrict_blocked(opts)
367 |> restrict_recipients(recipients, opts["user"])
374 "?->>'type' = ? and ?->>'context' = ?",
380 order_by: [desc: :id]
386 def fetch_public_activities(opts \\ %{}) do
387 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
390 |> restrict_unlisted()
395 @valid_visibilities ~w[direct unlisted public private]
397 defp restrict_visibility(query, %{visibility: visibility})
398 when visibility in @valid_visibilities do
403 fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
406 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
411 defp restrict_visibility(_query, %{visibility: visibility})
412 when visibility not in @valid_visibilities do
413 Logger.error("Could not restrict visibility to #{visibility}")
416 defp restrict_visibility(query, _visibility), do: query
418 def fetch_user_activities(user, reading_user, params \\ %{}) do
421 |> Map.put("type", ["Create", "Announce"])
422 |> Map.put("actor_id", user.ap_id)
423 |> Map.put("whole_db", true)
424 |> Map.put("pinned_activity_ids", user.info.pinned_activities)
428 ["https://www.w3.org/ns/activitystreams#Public"] ++
429 [reading_user.ap_id | reading_user.following]
431 ["https://www.w3.org/ns/activitystreams#Public"]
434 fetch_activities(recipients, params)
438 defp restrict_since(query, %{"since_id" => ""}), do: query
440 defp restrict_since(query, %{"since_id" => since_id}) do
441 from(activity in query, where: activity.id > ^since_id)
444 defp restrict_since(query, _), do: query
446 defp restrict_tag_reject(query, %{"tag_reject" => tag_reject})
447 when is_list(tag_reject) and tag_reject != [] do
450 where: fragment("(not (? #> '{\"object\",\"tag\"}') \\?| ?)", activity.data, ^tag_reject)
454 defp restrict_tag_reject(query, _), do: query
456 defp restrict_tag_all(query, %{"tag_all" => tag_all})
457 when is_list(tag_all) and tag_all != [] do
460 where: fragment("(? #> '{\"object\",\"tag\"}') \\?& ?", activity.data, ^tag_all)
464 defp restrict_tag_all(query, _), do: query
466 defp restrict_tag(query, %{"tag" => tag}) when is_list(tag) do
469 where: fragment("(? #> '{\"object\",\"tag\"}') \\?| ?", activity.data, ^tag)
473 defp restrict_tag(query, %{"tag" => tag}) when is_binary(tag) do
476 where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
480 defp restrict_tag(query, _), do: query
482 defp restrict_to_cc(query, recipients_to, recipients_cc) do
487 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
496 defp restrict_recipients(query, [], _user), do: query
498 defp restrict_recipients(query, recipients, nil) do
499 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
502 defp restrict_recipients(query, recipients, user) do
505 where: fragment("? && ?", ^recipients, activity.recipients),
506 or_where: activity.actor == ^user.ap_id
510 defp restrict_limit(query, %{"limit" => limit}) do
511 from(activity in query, limit: ^limit)
514 defp restrict_limit(query, _), do: query
516 defp restrict_local(query, %{"local_only" => true}) do
517 from(activity in query, where: activity.local == true)
520 defp restrict_local(query, _), do: query
522 defp restrict_max(query, %{"max_id" => ""}), do: query
524 defp restrict_max(query, %{"max_id" => max_id}) do
525 from(activity in query, where: activity.id < ^max_id)
528 defp restrict_max(query, _), do: query
530 defp restrict_actor(query, %{"actor_id" => actor_id}) do
531 from(activity in query, where: activity.actor == ^actor_id)
534 defp restrict_actor(query, _), do: query
536 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
537 from(activity in query, where: fragment("?->>'type' = ?", activity.data, ^type))
540 defp restrict_type(query, %{"type" => type}) do
541 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
544 defp restrict_type(query, _), do: query
546 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
549 where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
553 defp restrict_favorited_by(query, _), do: query
555 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
558 where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
562 defp restrict_media(query, _), do: query
564 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
567 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
571 defp restrict_replies(query, _), do: query
573 defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
574 from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
577 defp restrict_reblogs(query, _), do: query
579 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
580 blocks = info.blocks || []
581 domain_blocks = info.domain_blocks || []
585 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
586 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
587 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
591 defp restrict_blocked(query, _), do: query
593 defp restrict_unlisted(query) do
598 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
600 ^["https://www.w3.org/ns/activitystreams#Public"]
605 defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
606 from(activity in query, where: activity.id in ^ids)
609 defp restrict_pinned(query, _), do: query
611 def fetch_activities_query(recipients, opts \\ %{}) do
614 activity in Activity,
616 order_by: [fragment("? desc nulls last", activity.id)]
620 |> restrict_recipients(recipients, opts["user"])
621 |> restrict_tag(opts)
622 |> restrict_tag_reject(opts)
623 |> restrict_tag_all(opts)
624 |> restrict_since(opts)
625 |> restrict_local(opts)
626 |> restrict_limit(opts)
627 |> restrict_max(opts)
628 |> restrict_actor(opts)
629 |> restrict_type(opts)
630 |> restrict_favorited_by(opts)
631 |> restrict_blocked(opts)
632 |> restrict_media(opts)
633 |> restrict_visibility(opts)
634 |> restrict_replies(opts)
635 |> restrict_reblogs(opts)
636 |> restrict_pinned(opts)
639 def fetch_activities(recipients, opts \\ %{}) do
640 fetch_activities_query(recipients, opts)
645 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
646 fetch_activities_query([], opts)
647 |> restrict_to_cc(recipients_to, recipients_cc)
652 def upload(file, opts \\ []) do
653 with {:ok, data} <- Upload.store(file, opts) do
656 Map.put(data, "actor", opts[:actor])
661 Repo.insert(%Object{data: obj_data})
665 def user_data_from_user_object(data) do
667 data["icon"]["url"] &&
670 "url" => [%{"href" => data["icon"]["url"]}]
674 data["image"]["url"] &&
677 "url" => [%{"href" => data["image"]["url"]}]
680 locked = data["manuallyApprovesFollowers"] || false
681 data = Transmogrifier.maybe_fix_user_object(data)
686 "ap_enabled" => true,
687 "source_data" => data,
693 follower_address: data["followers"],
697 # nickname can be nil because of virtual actors
699 if data["preferredUsername"] do
703 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
706 Map.put(user_data, :nickname, nil)
712 def fetch_and_prepare_user_from_ap_id(ap_id) do
713 with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
714 user_data_from_user_object(data)
716 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
720 def make_user_from_ap_id(ap_id) do
721 if _user = User.get_by_ap_id(ap_id) do
722 Transmogrifier.upgrade_user_from_ap_id(ap_id)
724 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
725 User.insert_or_update_user(data)
732 def make_user_from_nickname(nickname) do
733 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
734 make_user_from_ap_id(ap_id)
736 _e -> {:error, "No AP id in WebFinger"}
740 def should_federate?(inbox, public) do
744 inbox_info = URI.parse(inbox)
745 !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
749 def publish(actor, activity) do
751 if actor.follower_address in activity.recipients do
752 {:ok, followers} = User.get_followers(actor)
753 followers |> Enum.filter(&(!&1.local))
758 public = is_public?(activity)
760 reachable_inboxes_metadata =
761 (Pleroma.Web.Salmon.remote_users(activity) ++ remote_followers)
762 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
763 |> Enum.map(fn %{info: %{source_data: data}} ->
764 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
767 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
768 |> Instances.filter_reachable()
770 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
771 json = Jason.encode!(data)
773 Enum.each(reachable_inboxes_metadata, fn {inbox, unreachable_since} ->
774 Federator.enqueue(:publish_single_ap, %{
778 id: activity.data["id"],
779 unreachable_since: unreachable_since
784 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id} = params) do
785 Logger.info("Federating #{id} to #{inbox}")
786 host = URI.parse(inbox).host
788 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
791 Pleroma.Web.HTTPSignatures.sign(actor, %{
793 "content-length": byte_size(json),
797 with {:ok, %{status: code}} when code in 200..299 <-
803 {"Content-Type", "application/activity+json"},
804 {"signature", signature},
808 if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
809 do: Instances.set_reachable(inbox)
813 {_post_result, response} ->
814 unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
820 # This will create a Create activity, which we need internally at the moment.
821 def fetch_object_from_id(id) do
822 if object = Object.get_cached_by_ap_id(id) do
825 Logger.info("Fetching #{id} via AP")
827 with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
828 nil <- Object.normalize(data),
833 "actor" => data["actor"] || data["attributedTo"],
836 :ok <- Transmogrifier.contain_origin(id, params),
837 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
838 {:ok, Object.normalize(activity.data["object"])}
840 {:error, {:reject, nil}} ->
843 object = %Object{} ->
847 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
849 case OStatus.fetch_activity_from_url(id) do
850 {:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
857 def fetch_and_contain_remote_object_from_id(id) do
858 Logger.info("Fetching #{id} via AP")
860 with true <- String.starts_with?(id, "http"),
861 {:ok, %{body: body, status: code}} when code in 200..299 <-
864 [{:Accept, "application/activity+json"}]
866 {:ok, data} <- Jason.decode(body),
867 :ok <- Transmogrifier.contain_origin_from_id(id, data) do
875 def is_public?(%Object{data: %{"type" => "Tombstone"}}), do: false
876 def is_public?(%Object{data: data}), do: is_public?(data)
877 def is_public?(%Activity{data: data}), do: is_public?(data)
878 def is_public?(%{"directMessage" => true}), do: false
880 def is_public?(data) do
881 "https://www.w3.org/ns/activitystreams#Public" in (data["to"] ++ (data["cc"] || []))
884 def is_private?(activity) do
885 !is_public?(activity) && Enum.any?(activity.data["to"], &String.contains?(&1, "/followers"))
888 def is_direct?(%Activity{data: %{"directMessage" => true}}), do: true
889 def is_direct?(%Object{data: %{"directMessage" => true}}), do: true
891 def is_direct?(activity) do
892 !is_public?(activity) && !is_private?(activity)
895 def visible_for_user?(activity, nil) do
899 def visible_for_user?(activity, user) do
900 x = [user.ap_id | user.following]
901 y = activity.data["to"] ++ (activity.data["cc"] || [])
902 visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
906 def entire_thread_visible_for_user?(nil, _user), do: false
909 def entire_thread_visible_for_user?(
910 %Activity{data: %{"object" => %{"inReplyTo" => parent_id}}} = tail,
913 when is_binary(parent_id) do
914 parent = Activity.get_in_reply_to_activity(tail)
915 visible_for_user?(tail, user) && entire_thread_visible_for_user?(parent, user)
919 def entire_thread_visible_for_user?(tail, user), do: visible_for_user?(tail, user)
921 # filter out broken threads
922 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
923 entire_thread_visible_for_user?(activity, user)
926 # do post-processing on a specific activity
927 def contain_activity(%Activity{} = activity, %User{} = user) do
928 contain_broken_threads(activity, user)
931 # do post-processing on a timeline
932 def contain_timeline(timeline, user) do
934 |> Enum.filter(fn activity ->
935 contain_activity(activity, user)