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, "object" => object},
176 {:ok, activity} <- insert(data, local),
177 :ok <- maybe_federate(activity) do
182 def reject(%{to: to, actor: actor, object: object} = params) do
183 # only accept false as false value
184 local = !(params[:local] == false)
186 with data <- %{"to" => to, "type" => "Reject", "actor" => actor, "object" => object},
187 {:ok, activity} <- insert(data, local),
188 :ok <- maybe_federate(activity) do
193 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
194 # only accept false as false value
195 local = !(params[:local] == false)
204 {:ok, activity} <- insert(data, local),
205 :ok <- maybe_federate(activity) do
210 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
212 %User{ap_id: ap_id} = user,
213 %Object{data: %{"id" => _}} = object,
217 with nil <- get_existing_like(ap_id, object),
218 like_data <- make_like_data(user, object, activity_id),
219 {:ok, activity} <- insert(like_data, local),
220 {:ok, object} <- add_like_to_object(activity, object),
221 :ok <- maybe_federate(activity) do
222 {:ok, activity, object}
224 %Activity{} = activity -> {:ok, activity, object}
225 error -> {:error, error}
235 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
236 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
237 {:ok, unlike_activity} <- insert(unlike_data, local),
238 {:ok, _activity} <- Repo.delete(like_activity),
239 {:ok, object} <- remove_like_from_object(like_activity, object),
240 :ok <- maybe_federate(unlike_activity) do
241 {:ok, unlike_activity, like_activity, object}
248 %User{ap_id: _} = user,
249 %Object{data: %{"id" => _}} = object,
254 with true <- is_public?(object),
255 announce_data <- make_announce_data(user, object, activity_id, public),
256 {:ok, activity} <- insert(announce_data, local),
257 {:ok, object} <- add_announce_to_object(activity, object),
258 :ok <- maybe_federate(activity) do
259 {:ok, activity, object}
261 error -> {:error, error}
271 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
272 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
273 {:ok, unannounce_activity} <- insert(unannounce_data, local),
274 :ok <- maybe_federate(unannounce_activity),
275 {:ok, _activity} <- Repo.delete(announce_activity),
276 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
277 {:ok, unannounce_activity, object}
283 def follow(follower, followed, activity_id \\ nil, local \\ true) do
284 with data <- make_follow_data(follower, followed, activity_id),
285 {:ok, activity} <- insert(data, local),
286 :ok <- maybe_federate(activity) do
291 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
292 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
293 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
294 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
295 {:ok, activity} <- insert(unfollow_data, local),
296 :ok <- maybe_federate(activity) do
301 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
302 user = User.get_cached_by_ap_id(actor)
308 "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
311 with {:ok, _} <- Object.delete(object),
312 {:ok, activity} <- insert(data, local),
313 # Changing note count prior to enqueuing federation task in order to avoid race conditions on updating user.info
314 {:ok, _actor} <- User.decrease_note_count(user),
315 :ok <- maybe_federate(activity) do
320 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
321 ap_config = Application.get_env(:pleroma, :activitypub)
322 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
323 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
325 with true <- unfollow_blocked do
326 follow_activity = fetch_latest_follow(blocker, blocked)
328 if follow_activity do
329 unfollow(blocker, blocked, nil, local)
333 with true <- outgoing_blocks,
334 block_data <- make_block_data(blocker, blocked, activity_id),
335 {:ok, activity} <- insert(block_data, local),
336 :ok <- maybe_federate(activity) do
343 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
344 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
345 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
346 {:ok, activity} <- insert(unblock_data, local),
347 :ok <- maybe_federate(activity) do
352 def fetch_activities_for_context(context, opts \\ %{}) do
353 public = ["https://www.w3.org/ns/activitystreams#Public"]
356 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
358 query = from(activity in Activity)
362 |> restrict_blocked(opts)
363 |> restrict_recipients(recipients, opts["user"])
370 "?->>'type' = ? and ?->>'context' = ?",
376 order_by: [desc: :id]
382 def fetch_public_activities(opts \\ %{}) do
383 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
386 |> restrict_unlisted()
391 @valid_visibilities ~w[direct unlisted public private]
393 defp restrict_visibility(query, %{visibility: visibility})
394 when visibility in @valid_visibilities do
399 fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
402 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
407 defp restrict_visibility(_query, %{visibility: visibility})
408 when visibility not in @valid_visibilities do
409 Logger.error("Could not restrict visibility to #{visibility}")
412 defp restrict_visibility(query, _visibility), do: query
414 def fetch_user_activities(user, reading_user, params \\ %{}) do
417 |> Map.put("type", ["Create", "Announce"])
418 |> Map.put("actor_id", user.ap_id)
419 |> Map.put("whole_db", true)
420 |> Map.put("pinned_activity_ids", user.info.pinned_activities)
424 ["https://www.w3.org/ns/activitystreams#Public"] ++
425 [reading_user.ap_id | reading_user.following]
427 ["https://www.w3.org/ns/activitystreams#Public"]
430 fetch_activities(recipients, params)
434 defp restrict_since(query, %{"since_id" => ""}), do: query
436 defp restrict_since(query, %{"since_id" => since_id}) do
437 from(activity in query, where: activity.id > ^since_id)
440 defp restrict_since(query, _), do: query
442 defp restrict_tag_reject(query, %{"tag_reject" => tag_reject})
443 when is_list(tag_reject) and tag_reject != [] do
446 where: fragment("(not (? #> '{\"object\",\"tag\"}') \\?| ?)", activity.data, ^tag_reject)
450 defp restrict_tag_reject(query, _), do: query
452 defp restrict_tag_all(query, %{"tag_all" => tag_all})
453 when is_list(tag_all) and tag_all != [] do
456 where: fragment("(? #> '{\"object\",\"tag\"}') \\?& ?", activity.data, ^tag_all)
460 defp restrict_tag_all(query, _), do: query
462 defp restrict_tag(query, %{"tag" => tag}) when is_list(tag) do
465 where: fragment("(? #> '{\"object\",\"tag\"}') \\?| ?", activity.data, ^tag)
469 defp restrict_tag(query, %{"tag" => tag}) when is_binary(tag) do
472 where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
476 defp restrict_tag(query, _), do: query
478 defp restrict_to_cc(query, recipients_to, recipients_cc) do
483 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
492 defp restrict_recipients(query, [], _user), do: query
494 defp restrict_recipients(query, recipients, nil) do
495 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
498 defp restrict_recipients(query, recipients, user) do
501 where: fragment("? && ?", ^recipients, activity.recipients),
502 or_where: activity.actor == ^user.ap_id
506 defp restrict_limit(query, %{"limit" => limit}) do
507 from(activity in query, limit: ^limit)
510 defp restrict_limit(query, _), do: query
512 defp restrict_local(query, %{"local_only" => true}) do
513 from(activity in query, where: activity.local == true)
516 defp restrict_local(query, _), do: query
518 defp restrict_max(query, %{"max_id" => ""}), do: query
520 defp restrict_max(query, %{"max_id" => max_id}) do
521 from(activity in query, where: activity.id < ^max_id)
524 defp restrict_max(query, _), do: query
526 defp restrict_actor(query, %{"actor_id" => actor_id}) do
527 from(activity in query, where: activity.actor == ^actor_id)
530 defp restrict_actor(query, _), do: query
532 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
533 from(activity in query, where: fragment("?->>'type' = ?", activity.data, ^type))
536 defp restrict_type(query, %{"type" => type}) do
537 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
540 defp restrict_type(query, _), do: query
542 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
545 where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
549 defp restrict_favorited_by(query, _), do: query
551 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
554 where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
558 defp restrict_media(query, _), do: query
560 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
563 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
567 defp restrict_replies(query, _), do: query
569 defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
570 from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
573 defp restrict_reblogs(query, _), do: query
575 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
576 blocks = info.blocks || []
577 domain_blocks = info.domain_blocks || []
581 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
582 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
583 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
587 defp restrict_blocked(query, _), do: query
589 defp restrict_unlisted(query) do
594 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
596 ^["https://www.w3.org/ns/activitystreams#Public"]
601 defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
602 from(activity in query, where: activity.id in ^ids)
605 defp restrict_pinned(query, _), do: query
607 def fetch_activities_query(recipients, opts \\ %{}) do
610 activity in Activity,
612 order_by: [fragment("? desc nulls last", activity.id)]
616 |> restrict_recipients(recipients, opts["user"])
617 |> restrict_tag(opts)
618 |> restrict_tag_reject(opts)
619 |> restrict_tag_all(opts)
620 |> restrict_since(opts)
621 |> restrict_local(opts)
622 |> restrict_limit(opts)
623 |> restrict_max(opts)
624 |> restrict_actor(opts)
625 |> restrict_type(opts)
626 |> restrict_favorited_by(opts)
627 |> restrict_blocked(opts)
628 |> restrict_media(opts)
629 |> restrict_visibility(opts)
630 |> restrict_replies(opts)
631 |> restrict_reblogs(opts)
632 |> restrict_pinned(opts)
635 def fetch_activities(recipients, opts \\ %{}) do
636 fetch_activities_query(recipients, opts)
641 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
642 fetch_activities_query([], opts)
643 |> restrict_to_cc(recipients_to, recipients_cc)
648 def upload(file, opts \\ []) do
649 with {:ok, data} <- Upload.store(file, opts) do
652 Map.put(data, "actor", opts[:actor])
657 Repo.insert(%Object{data: obj_data})
661 def user_data_from_user_object(data) do
663 data["icon"]["url"] &&
666 "url" => [%{"href" => data["icon"]["url"]}]
670 data["image"]["url"] &&
673 "url" => [%{"href" => data["image"]["url"]}]
676 locked = data["manuallyApprovesFollowers"] || false
677 data = Transmogrifier.maybe_fix_user_object(data)
682 "ap_enabled" => true,
683 "source_data" => data,
689 follower_address: data["followers"],
693 # nickname can be nil because of virtual actors
695 if data["preferredUsername"] do
699 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
702 Map.put(user_data, :nickname, nil)
708 def fetch_and_prepare_user_from_ap_id(ap_id) do
709 with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
710 user_data_from_user_object(data)
712 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
716 def make_user_from_ap_id(ap_id) do
717 if _user = User.get_by_ap_id(ap_id) do
718 Transmogrifier.upgrade_user_from_ap_id(ap_id)
720 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
721 User.insert_or_update_user(data)
728 def make_user_from_nickname(nickname) do
729 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
730 make_user_from_ap_id(ap_id)
732 _e -> {:error, "No AP id in WebFinger"}
736 def should_federate?(inbox, public) do
740 inbox_info = URI.parse(inbox)
741 !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
745 def publish(actor, activity) do
747 if actor.follower_address in activity.recipients do
748 {:ok, followers} = User.get_followers(actor)
749 followers |> Enum.filter(&(!&1.local))
754 public = is_public?(activity)
756 reachable_inboxes_metadata =
757 (Pleroma.Web.Salmon.remote_users(activity) ++ remote_followers)
758 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
759 |> Enum.map(fn %{info: %{source_data: data}} ->
760 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
763 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
764 |> Instances.filter_reachable()
766 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
767 json = Jason.encode!(data)
769 Enum.each(reachable_inboxes_metadata, fn {inbox, unreachable_since} ->
770 Federator.enqueue(:publish_single_ap, %{
774 id: activity.data["id"],
775 unreachable_since: unreachable_since
780 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id} = params) do
781 Logger.info("Federating #{id} to #{inbox}")
782 host = URI.parse(inbox).host
784 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
787 Pleroma.Web.HTTPSignatures.sign(actor, %{
789 "content-length": byte_size(json),
793 with {:ok, %{status: code}} when code in 200..299 <-
799 {"Content-Type", "application/activity+json"},
800 {"signature", signature},
804 if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
805 do: Instances.set_reachable(inbox)
809 {_post_result, response} ->
810 unless params[:unreachable_since], do: Instances.set_unreachable(inbox)
816 # This will create a Create activity, which we need internally at the moment.
817 def fetch_object_from_id(id) do
818 if object = Object.get_cached_by_ap_id(id) do
821 Logger.info("Fetching #{id} via AP")
823 with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
824 nil <- Object.normalize(data),
829 "actor" => data["actor"] || data["attributedTo"],
832 :ok <- Transmogrifier.contain_origin(id, params),
833 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
834 {:ok, Object.normalize(activity.data["object"])}
836 {:error, {:reject, nil}} ->
839 object = %Object{} ->
843 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
845 case OStatus.fetch_activity_from_url(id) do
846 {:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
853 def fetch_and_contain_remote_object_from_id(id) do
854 Logger.info("Fetching #{id} via AP")
856 with true <- String.starts_with?(id, "http"),
857 {:ok, %{body: body, status: code}} when code in 200..299 <-
860 [{:Accept, "application/activity+json"}]
862 {:ok, data} <- Jason.decode(body),
863 :ok <- Transmogrifier.contain_origin_from_id(id, data) do
871 def is_public?(%Object{data: %{"type" => "Tombstone"}}), do: false
872 def is_public?(%Object{data: data}), do: is_public?(data)
873 def is_public?(%Activity{data: data}), do: is_public?(data)
874 def is_public?(%{"directMessage" => true}), do: false
876 def is_public?(data) do
877 "https://www.w3.org/ns/activitystreams#Public" in (data["to"] ++ (data["cc"] || []))
880 def is_private?(activity) do
881 !is_public?(activity) && Enum.any?(activity.data["to"], &String.contains?(&1, "/followers"))
884 def is_direct?(%Activity{data: %{"directMessage" => true}}), do: true
885 def is_direct?(%Object{data: %{"directMessage" => true}}), do: true
887 def is_direct?(activity) do
888 !is_public?(activity) && !is_private?(activity)
891 def visible_for_user?(activity, nil) do
895 def visible_for_user?(activity, user) do
896 x = [user.ap_id | user.following]
897 y = activity.data["to"] ++ (activity.data["cc"] || [])
898 visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
902 def entire_thread_visible_for_user?(nil, _user), do: false
905 def entire_thread_visible_for_user?(
906 %Activity{data: %{"object" => %{"inReplyTo" => parent_id}}} = tail,
909 when is_binary(parent_id) do
910 parent = Activity.get_in_reply_to_activity(tail)
911 visible_for_user?(tail, user) && entire_thread_visible_for_user?(parent, user)
915 def entire_thread_visible_for_user?(tail, user), do: visible_for_user?(tail, user)
917 # filter out broken threads
918 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
919 entire_thread_visible_for_user?(activity, user)
922 # do post-processing on a specific activity
923 def contain_activity(%Activity{} = activity, %User{} = user) do
924 contain_broken_threads(activity, user)
927 # do post-processing on a timeline
928 def contain_timeline(timeline, user) do
930 |> Enum.filter(fn activity ->
931 contain_activity(activity, user)