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
6 alias Pleroma.{Activity, Repo, Object, Upload, User, Notification}
7 alias Pleroma.Web.ActivityPub.{Transmogrifier, MRF}
8 alias Pleroma.Web.WebFinger
9 alias Pleroma.Web.Federator
10 alias Pleroma.Web.OStatus
12 import Pleroma.Web.ActivityPub.Utils
15 @httpoison Application.get_env(:pleroma, :httpoison)
17 # For Announce activities, we filter the recipients based on following status for any actors
18 # that match actual users. See issue #164 for more information about why this is necessary.
19 defp get_recipients(%{"type" => "Announce"} = data) do
23 actor = User.get_cached_by_ap_id(data["actor"])
26 |> Enum.filter(fn recipient ->
27 case User.get_cached_by_ap_id(recipient) do
32 User.following?(user, actor)
39 defp get_recipients(data) do
46 defp check_actor_is_active(actor) do
47 if not is_nil(actor) do
48 with user <- User.get_cached_by_ap_id(actor),
49 false <- user.info.deactivated do
59 defp check_remote_limit(%{"object" => %{"content" => content}}) do
60 limit = Pleroma.Config.get([:instance, :remote_limit])
61 String.length(content) <= limit
64 defp check_remote_limit(_), do: true
66 def insert(map, local \\ true) when is_map(map) do
67 with nil <- Activity.normalize(map),
68 map <- lazy_put_activity_defaults(map),
69 :ok <- check_actor_is_active(map["actor"]),
70 {_, true} <- {:remote_limit_error, check_remote_limit(map)},
71 {:ok, map} <- MRF.filter(map),
72 :ok <- insert_full_object(map) do
73 {recipients, _, _} = get_recipients(map)
76 Repo.insert(%Activity{
80 recipients: recipients
83 Notification.create_notifications(activity)
87 %Activity{} = activity -> {:ok, activity}
88 error -> {:error, error}
92 def stream_out(activity) do
93 public = "https://www.w3.org/ns/activitystreams#Public"
95 if activity.data["type"] in ["Create", "Announce", "Delete"] do
96 Pleroma.Web.Streamer.stream("user", activity)
97 Pleroma.Web.Streamer.stream("list", activity)
99 if Enum.member?(activity.data["to"], public) do
100 Pleroma.Web.Streamer.stream("public", activity)
103 Pleroma.Web.Streamer.stream("public:local", activity)
106 if activity.data["type"] in ["Create"] do
107 activity.data["object"]
108 |> Map.get("tag", [])
109 |> Enum.filter(fn tag -> is_bitstring(tag) end)
110 |> Enum.map(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
112 if activity.data["object"]["attachment"] != [] do
113 Pleroma.Web.Streamer.stream("public:media", activity)
116 Pleroma.Web.Streamer.stream("public:local:media", activity)
121 if !Enum.member?(activity.data["cc"] || [], public) &&
124 User.get_by_ap_id(activity.data["actor"]).follower_address
126 do: Pleroma.Web.Streamer.stream("direct", activity)
131 def create(%{to: to, actor: actor, context: context, object: object} = params) do
132 additional = params[:additional] || %{}
133 # only accept false as false value
134 local = !(params[:local] == false)
135 published = params[:published]
139 %{to: to, actor: actor, published: published, context: context, object: object},
142 {:ok, activity} <- insert(create_data, local),
143 :ok <- maybe_federate(activity),
144 {:ok, _actor} <- User.increase_note_count(actor) do
149 def accept(%{to: to, actor: actor, object: object} = params) do
150 # only accept false as false value
151 local = !(params[:local] == false)
153 with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
154 {:ok, activity} <- insert(data, local),
155 :ok <- maybe_federate(activity) do
160 def reject(%{to: to, actor: actor, object: object} = params) do
161 # only accept false as false value
162 local = !(params[:local] == false)
164 with data <- %{"to" => to, "type" => "Reject", "actor" => actor, "object" => object},
165 {:ok, activity} <- insert(data, local),
166 :ok <- maybe_federate(activity) do
171 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
172 # only accept false as false value
173 local = !(params[:local] == false)
182 {:ok, activity} <- insert(data, local),
183 :ok <- maybe_federate(activity) do
188 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
190 %User{ap_id: ap_id} = user,
191 %Object{data: %{"id" => _}} = object,
195 with nil <- get_existing_like(ap_id, object),
196 like_data <- make_like_data(user, object, activity_id),
197 {:ok, activity} <- insert(like_data, local),
198 {:ok, object} <- add_like_to_object(activity, object),
199 :ok <- maybe_federate(activity) do
200 {:ok, activity, object}
202 %Activity{} = activity -> {:ok, activity, object}
203 error -> {:error, error}
213 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
214 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
215 {:ok, unlike_activity} <- insert(unlike_data, local),
216 {:ok, _activity} <- Repo.delete(like_activity),
217 {:ok, object} <- remove_like_from_object(like_activity, object),
218 :ok <- maybe_federate(unlike_activity) do
219 {:ok, unlike_activity, like_activity, object}
226 %User{ap_id: _} = user,
227 %Object{data: %{"id" => _}} = object,
232 with true <- is_public?(object),
233 announce_data <- make_announce_data(user, object, activity_id, public),
234 {:ok, activity} <- insert(announce_data, local),
235 {:ok, object} <- add_announce_to_object(activity, object),
236 :ok <- maybe_federate(activity) do
237 {:ok, activity, object}
239 error -> {:error, error}
249 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
250 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
251 {:ok, unannounce_activity} <- insert(unannounce_data, local),
252 :ok <- maybe_federate(unannounce_activity),
253 {:ok, _activity} <- Repo.delete(announce_activity),
254 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
255 {:ok, unannounce_activity, object}
261 def follow(follower, followed, activity_id \\ nil, local \\ true) do
262 with data <- make_follow_data(follower, followed, activity_id),
263 {:ok, activity} <- insert(data, local),
264 :ok <- maybe_federate(activity) do
269 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
270 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
271 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
272 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
273 {:ok, activity} <- insert(unfollow_data, local),
274 :ok <- maybe_federate(activity) do
279 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
280 user = User.get_cached_by_ap_id(actor)
286 "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
289 with {:ok, _} <- Object.delete(object),
290 {:ok, activity} <- insert(data, local),
291 :ok <- maybe_federate(activity),
292 {:ok, _actor} <- User.decrease_note_count(user) do
297 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
298 ap_config = Application.get_env(:pleroma, :activitypub)
299 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
300 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
302 with true <- unfollow_blocked do
303 follow_activity = fetch_latest_follow(blocker, blocked)
305 if follow_activity do
306 unfollow(blocker, blocked, nil, local)
310 with true <- outgoing_blocks,
311 block_data <- make_block_data(blocker, blocked, activity_id),
312 {:ok, activity} <- insert(block_data, local),
313 :ok <- maybe_federate(activity) do
320 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
321 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
322 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
323 {:ok, activity} <- insert(unblock_data, local),
324 :ok <- maybe_federate(activity) do
329 def fetch_activities_for_context(context, opts \\ %{}) do
330 public = ["https://www.w3.org/ns/activitystreams#Public"]
333 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
335 query = from(activity in Activity)
339 |> restrict_blocked(opts)
340 |> restrict_recipients(recipients, opts["user"])
347 "?->>'type' = ? and ?->>'context' = ?",
353 order_by: [desc: :id]
359 def fetch_public_activities(opts \\ %{}) do
360 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
363 |> restrict_unlisted()
368 @valid_visibilities ~w[direct unlisted public private]
370 defp restrict_visibility(query, %{visibility: visibility})
371 when visibility in @valid_visibilities do
376 fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
379 Ecto.Adapters.SQL.to_sql(:all, Repo, query)
384 defp restrict_visibility(_query, %{visibility: visibility})
385 when visibility not in @valid_visibilities do
386 Logger.error("Could not restrict visibility to #{visibility}")
389 defp restrict_visibility(query, _visibility), do: query
391 def fetch_user_activities(user, reading_user, params \\ %{}) do
394 |> Map.put("type", ["Create", "Announce"])
395 |> Map.put("actor_id", user.ap_id)
396 |> Map.put("whole_db", true)
397 |> Map.put("pinned_activity_ids", user.info.pinned_activities)
401 ["https://www.w3.org/ns/activitystreams#Public"] ++
402 [reading_user.ap_id | reading_user.following]
404 ["https://www.w3.org/ns/activitystreams#Public"]
407 fetch_activities(recipients, params)
411 defp restrict_since(query, %{"since_id" => since_id}) do
412 from(activity in query, where: activity.id > ^since_id)
415 defp restrict_since(query, _), do: query
417 defp restrict_tag(query, %{"tag" => tag}) do
420 where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
424 defp restrict_tag(query, _), do: query
426 defp restrict_to_cc(query, recipients_to, recipients_cc) do
431 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
440 defp restrict_recipients(query, [], _user), do: query
442 defp restrict_recipients(query, recipients, nil) do
443 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
446 defp restrict_recipients(query, recipients, user) do
449 where: fragment("? && ?", ^recipients, activity.recipients),
450 or_where: activity.actor == ^user.ap_id
454 defp restrict_limit(query, %{"limit" => limit}) do
455 from(activity in query, limit: ^limit)
458 defp restrict_limit(query, _), do: query
460 defp restrict_local(query, %{"local_only" => true}) do
461 from(activity in query, where: activity.local == true)
464 defp restrict_local(query, _), do: query
466 defp restrict_max(query, %{"max_id" => max_id}) do
467 from(activity in query, where: activity.id < ^max_id)
470 defp restrict_max(query, _), do: query
472 defp restrict_actor(query, %{"actor_id" => actor_id}) do
473 from(activity in query, where: activity.actor == ^actor_id)
476 defp restrict_actor(query, _), do: query
478 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
479 restrict_type(query, %{"type" => [type]})
482 defp restrict_type(query, %{"type" => type}) do
483 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
486 defp restrict_type(query, _), do: query
488 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
491 where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
495 defp restrict_favorited_by(query, _), do: query
497 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
500 where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
504 defp restrict_media(query, _), do: query
506 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
509 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
513 defp restrict_replies(query, _), do: query
515 defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
516 from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
519 defp restrict_reblogs(query, _), do: query
521 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
522 blocks = info.blocks || []
523 domain_blocks = info.domain_blocks || []
527 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
528 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
529 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
533 defp restrict_blocked(query, _), do: query
535 defp restrict_unlisted(query) do
540 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
542 ^["https://www.w3.org/ns/activitystreams#Public"]
547 defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
548 from(activity in query, where: activity.id in ^ids)
551 defp restrict_pinned(query, _), do: query
553 def fetch_activities_query(recipients, opts \\ %{}) do
556 activity in Activity,
558 order_by: [fragment("? desc nulls last", activity.id)]
562 |> restrict_recipients(recipients, opts["user"])
563 |> restrict_tag(opts)
564 |> restrict_since(opts)
565 |> restrict_local(opts)
566 |> restrict_limit(opts)
567 |> restrict_max(opts)
568 |> restrict_actor(opts)
569 |> restrict_type(opts)
570 |> restrict_favorited_by(opts)
571 |> restrict_blocked(opts)
572 |> restrict_media(opts)
573 |> restrict_visibility(opts)
574 |> restrict_replies(opts)
575 |> restrict_reblogs(opts)
576 |> restrict_pinned(opts)
579 def fetch_activities(recipients, opts \\ %{}) do
580 fetch_activities_query(recipients, opts)
585 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
586 fetch_activities_query([], opts)
587 |> restrict_to_cc(recipients_to, recipients_cc)
592 def upload(file, opts \\ []) do
593 with {:ok, data} <- Upload.store(file, opts) do
596 Map.put(data, "actor", opts[:actor])
601 Repo.insert(%Object{data: obj_data})
605 def user_data_from_user_object(data) do
607 data["icon"]["url"] &&
610 "url" => [%{"href" => data["icon"]["url"]}]
614 data["image"]["url"] &&
617 "url" => [%{"href" => data["image"]["url"]}]
620 locked = data["manuallyApprovesFollowers"] || false
621 data = Transmogrifier.maybe_fix_user_object(data)
626 "ap_enabled" => true,
627 "source_data" => data,
633 follower_address: data["followers"],
637 # nickname can be nil because of virtual actors
639 if data["preferredUsername"] do
643 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
646 Map.put(user_data, :nickname, nil)
652 def fetch_and_prepare_user_from_ap_id(ap_id) do
653 with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
654 user_data_from_user_object(data)
656 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
660 def make_user_from_ap_id(ap_id) do
661 if _user = User.get_by_ap_id(ap_id) do
662 Transmogrifier.upgrade_user_from_ap_id(ap_id)
664 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
665 User.insert_or_update_user(data)
672 def make_user_from_nickname(nickname) do
673 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
674 make_user_from_ap_id(ap_id)
676 _e -> {:error, "No AP id in WebFinger"}
680 def should_federate?(inbox, public) do
684 inbox_info = URI.parse(inbox)
685 !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
689 def publish(actor, activity) do
691 if actor.follower_address in activity.recipients do
692 {:ok, followers} = User.get_followers(actor)
693 followers |> Enum.filter(&(!&1.local))
698 public = is_public?(activity)
701 (Pleroma.Web.Salmon.remote_users(activity) ++ followers)
702 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
703 |> Enum.map(fn %{info: %{source_data: data}} ->
704 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
707 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
709 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
710 json = Jason.encode!(data)
712 Enum.each(remote_inboxes, fn inbox ->
713 Federator.enqueue(:publish_single_ap, %{
717 id: activity.data["id"]
722 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
723 Logger.info("Federating #{id} to #{inbox}")
724 host = URI.parse(inbox).host
726 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
729 Pleroma.Web.HTTPSignatures.sign(actor, %{
731 "content-length": byte_size(json),
739 {"Content-Type", "application/activity+json"},
740 {"signature", signature},
747 # This will create a Create activity, which we need internally at the moment.
748 def fetch_object_from_id(id) do
749 if object = Object.get_cached_by_ap_id(id) do
752 Logger.info("Fetching #{id} via AP")
754 with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
755 nil <- Object.normalize(data),
760 "actor" => data["actor"] || data["attributedTo"],
763 :ok <- Transmogrifier.contain_origin(id, params),
764 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
765 {:ok, Object.normalize(activity.data["object"])}
767 {:error, {:reject, nil}} ->
770 object = %Object{} ->
774 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
776 case OStatus.fetch_activity_from_url(id) do
777 {:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
784 def fetch_and_contain_remote_object_from_id(id) do
785 Logger.info("Fetching #{id} via AP")
787 with true <- String.starts_with?(id, "http"),
788 {:ok, %{body: body, status: code}} when code in 200..299 <-
791 [{:Accept, "application/activity+json"}]
793 {:ok, data} <- Jason.decode(body),
794 :ok <- Transmogrifier.contain_origin_from_id(id, data) do
802 def is_public?(%Object{data: %{"type" => "Tombstone"}}), do: false
803 def is_public?(%Object{data: data}), do: is_public?(data)
804 def is_public?(%Activity{data: data}), do: is_public?(data)
806 def is_public?(data) do
807 "https://www.w3.org/ns/activitystreams#Public" in (data["to"] ++ (data["cc"] || []))
810 def visible_for_user?(activity, nil) do
814 def visible_for_user?(activity, user) do
815 x = [user.ap_id | user.following]
816 y = activity.data["to"] ++ (activity.data["cc"] || [])
817 visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
821 def entire_thread_visible_for_user?(nil, _user), do: false
824 def entire_thread_visible_for_user?(
825 %Activity{data: %{"object" => %{"inReplyTo" => parent_id}}} = tail,
828 when is_binary(parent_id) do
829 parent = Activity.get_in_reply_to_activity(tail)
830 visible_for_user?(tail, user) && entire_thread_visible_for_user?(parent, user)
834 def entire_thread_visible_for_user?(tail, user), do: visible_for_user?(tail, user)
836 # filter out broken threads
837 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
838 entire_thread_visible_for_user?(activity, user)
841 # do post-processing on a specific activity
842 def contain_activity(%Activity{} = activity, %User{} = user) do
843 contain_broken_threads(activity, user)
846 # do post-processing on a timeline
847 def contain_timeline(timeline, user) do
849 |> Enum.filter(fn activity ->
850 contain_activity(activity, user)