1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2018 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 def insert(map, local \\ true) when is_map(map) do
60 with nil <- Activity.normalize(map),
61 map <- lazy_put_activity_defaults(map),
62 :ok <- check_actor_is_active(map["actor"]),
63 {:ok, map} <- MRF.filter(map),
64 :ok <- insert_full_object(map) do
65 {recipients, _, _} = get_recipients(map)
68 Repo.insert(%Activity{
72 recipients: recipients
75 Notification.create_notifications(activity)
79 %Activity{} = activity -> {:ok, activity}
80 error -> {:error, error}
84 def stream_out(activity) do
85 public = "https://www.w3.org/ns/activitystreams#Public"
87 if activity.data["type"] in ["Create", "Announce"] do
88 Pleroma.Web.Streamer.stream("user", activity)
89 Pleroma.Web.Streamer.stream("list", activity)
91 if Enum.member?(activity.data["to"], public) do
92 Pleroma.Web.Streamer.stream("public", activity)
95 Pleroma.Web.Streamer.stream("public:local", activity)
98 activity.data["object"]
100 |> Enum.filter(fn tag -> is_bitstring(tag) end)
101 |> Enum.map(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
103 if activity.data["object"]["attachment"] != [] do
104 Pleroma.Web.Streamer.stream("public:media", activity)
107 Pleroma.Web.Streamer.stream("public:local:media", activity)
111 if !Enum.member?(activity.data["cc"] || [], public) &&
114 User.get_by_ap_id(activity.data["actor"]).follower_address
116 do: Pleroma.Web.Streamer.stream("direct", activity)
121 def create(%{to: to, actor: actor, context: context, object: object} = params) do
122 additional = params[:additional] || %{}
123 # only accept false as false value
124 local = !(params[:local] == false)
125 published = params[:published]
129 %{to: to, actor: actor, published: published, context: context, object: object},
132 {:ok, activity} <- insert(create_data, local),
133 :ok <- maybe_federate(activity),
134 {:ok, _actor} <- User.increase_note_count(actor) do
139 def accept(%{to: to, actor: actor, object: object} = params) do
140 # only accept false as false value
141 local = !(params[:local] == false)
143 with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
144 {:ok, activity} <- insert(data, local),
145 :ok <- maybe_federate(activity) do
150 def reject(%{to: to, actor: actor, object: object} = params) do
151 # only accept false as false value
152 local = !(params[:local] == false)
154 with data <- %{"to" => to, "type" => "Reject", "actor" => actor, "object" => object},
155 {:ok, activity} <- insert(data, local),
156 :ok <- maybe_federate(activity) do
161 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
162 # only accept false as false value
163 local = !(params[:local] == false)
172 {:ok, activity} <- insert(data, local),
173 :ok <- maybe_federate(activity) do
178 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
180 %User{ap_id: ap_id} = user,
181 %Object{data: %{"id" => _}} = object,
185 with nil <- get_existing_like(ap_id, object),
186 like_data <- make_like_data(user, object, activity_id),
187 {:ok, activity} <- insert(like_data, local),
188 {:ok, object} <- add_like_to_object(activity, object),
189 :ok <- maybe_federate(activity) do
190 {:ok, activity, object}
192 %Activity{} = activity -> {:ok, activity, object}
193 error -> {:error, error}
203 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
204 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
205 {:ok, unlike_activity} <- insert(unlike_data, local),
206 {:ok, _activity} <- Repo.delete(like_activity),
207 {:ok, object} <- remove_like_from_object(like_activity, object),
208 :ok <- maybe_federate(unlike_activity) do
209 {:ok, unlike_activity, like_activity, object}
216 %User{ap_id: _} = user,
217 %Object{data: %{"id" => _}} = object,
221 with true <- is_public?(object),
222 announce_data <- make_announce_data(user, object, activity_id),
223 {:ok, activity} <- insert(announce_data, local),
224 {:ok, object} <- add_announce_to_object(activity, object),
225 :ok <- maybe_federate(activity) do
226 {:ok, activity, object}
228 error -> {:error, error}
238 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
239 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
240 {:ok, unannounce_activity} <- insert(unannounce_data, local),
241 :ok <- maybe_federate(unannounce_activity),
242 {:ok, _activity} <- Repo.delete(announce_activity),
243 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
244 {:ok, unannounce_activity, object}
250 def follow(follower, followed, activity_id \\ nil, local \\ true) do
251 with data <- make_follow_data(follower, followed, activity_id),
252 {:ok, activity} <- insert(data, local),
253 :ok <- maybe_federate(activity) do
258 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
259 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
260 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
261 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
262 {:ok, activity} <- insert(unfollow_data, local),
263 :ok <- maybe_federate(activity) do
268 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
269 user = User.get_cached_by_ap_id(actor)
275 "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
278 with {:ok, _} <- Object.delete(object),
279 {:ok, activity} <- insert(data, local),
280 :ok <- maybe_federate(activity),
281 {:ok, _actor} <- User.decrease_note_count(user) do
286 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
287 ap_config = Application.get_env(:pleroma, :activitypub)
288 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
289 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
291 with true <- unfollow_blocked do
292 follow_activity = fetch_latest_follow(blocker, blocked)
294 if follow_activity do
295 unfollow(blocker, blocked, nil, local)
299 with true <- outgoing_blocks,
300 block_data <- make_block_data(blocker, blocked, activity_id),
301 {:ok, activity} <- insert(block_data, local),
302 :ok <- maybe_federate(activity) do
309 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
310 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
311 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
312 {:ok, activity} <- insert(unblock_data, local),
313 :ok <- maybe_federate(activity) do
318 def fetch_activities_for_context(context, opts \\ %{}) do
319 public = ["https://www.w3.org/ns/activitystreams#Public"]
322 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
324 query = from(activity in Activity)
328 |> restrict_blocked(opts)
329 |> restrict_recipients(recipients, opts["user"])
336 "?->>'type' = ? and ?->>'context' = ?",
342 order_by: [desc: :id]
348 def fetch_public_activities(opts \\ %{}) do
349 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
352 |> restrict_unlisted()
357 @valid_visibilities ~w[direct unlisted public private]
359 defp restrict_visibility(query, %{visibility: "direct"}) do
360 public = "https://www.w3.org/ns/activitystreams#Public"
364 join: sender in User,
365 on: sender.ap_id == activity.actor,
366 # Are non-direct statuses with no to/cc possible?
370 [^public, sender.follower_address],
376 defp restrict_visibility(_query, %{visibility: visibility})
377 when visibility not in @valid_visibilities do
378 Logger.error("Could not restrict visibility to #{visibility}")
381 defp restrict_visibility(query, _visibility), do: query
383 def fetch_user_activities(user, reading_user, params \\ %{}) do
386 |> Map.put("type", ["Create", "Announce"])
387 |> Map.put("actor_id", user.ap_id)
388 |> Map.put("whole_db", true)
392 ["https://www.w3.org/ns/activitystreams#Public"] ++
393 [reading_user.ap_id | reading_user.following]
395 ["https://www.w3.org/ns/activitystreams#Public"]
398 fetch_activities(recipients, params)
402 defp restrict_since(query, %{"since_id" => since_id}) do
403 from(activity in query, where: activity.id > ^since_id)
406 defp restrict_since(query, _), do: query
408 defp restrict_tag(query, %{"tag" => tag}) do
411 where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
415 defp restrict_tag(query, _), do: query
417 defp restrict_to_cc(query, recipients_to, recipients_cc) do
422 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
431 defp restrict_recipients(query, [], _user), do: query
433 defp restrict_recipients(query, recipients, nil) do
434 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
437 defp restrict_recipients(query, recipients, user) do
440 where: fragment("? && ?", ^recipients, activity.recipients),
441 or_where: activity.actor == ^user.ap_id
445 defp restrict_limit(query, %{"limit" => limit}) do
446 from(activity in query, limit: ^limit)
449 defp restrict_limit(query, _), do: query
451 defp restrict_local(query, %{"local_only" => true}) do
452 from(activity in query, where: activity.local == true)
455 defp restrict_local(query, _), do: query
457 defp restrict_max(query, %{"max_id" => max_id}) do
458 from(activity in query, where: activity.id < ^max_id)
461 defp restrict_max(query, _), do: query
463 defp restrict_actor(query, %{"actor_id" => actor_id}) do
464 from(activity in query, where: activity.actor == ^actor_id)
467 defp restrict_actor(query, _), do: query
469 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
470 restrict_type(query, %{"type" => [type]})
473 defp restrict_type(query, %{"type" => type}) do
474 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
477 defp restrict_type(query, _), do: query
479 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
482 where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
486 defp restrict_favorited_by(query, _), do: query
488 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
491 where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
495 defp restrict_media(query, _), do: query
497 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
500 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
504 defp restrict_replies(query, _), do: query
506 # Only search through last 100_000 activities by default
507 defp restrict_recent(query, %{"whole_db" => true}), do: query
509 defp restrict_recent(query, _) do
510 since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
512 from(activity in query, where: activity.id > ^since)
515 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
516 blocks = info.blocks || []
517 domain_blocks = info.domain_blocks || []
521 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
522 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
523 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
527 defp restrict_blocked(query, _), do: query
529 defp restrict_unlisted(query) do
534 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
536 ^["https://www.w3.org/ns/activitystreams#Public"]
541 def fetch_activities_query(recipients, opts \\ %{}) do
544 activity in Activity,
546 order_by: [fragment("? desc nulls last", activity.id)]
550 |> restrict_recipients(recipients, opts["user"])
551 |> restrict_tag(opts)
552 |> restrict_since(opts)
553 |> restrict_local(opts)
554 |> restrict_limit(opts)
555 |> restrict_max(opts)
556 |> restrict_actor(opts)
557 |> restrict_type(opts)
558 |> restrict_favorited_by(opts)
559 |> restrict_recent(opts)
560 |> restrict_blocked(opts)
561 |> restrict_media(opts)
562 |> restrict_visibility(opts)
563 |> restrict_replies(opts)
566 def fetch_activities(recipients, opts \\ %{}) do
567 fetch_activities_query(recipients, opts)
572 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
573 fetch_activities_query([], opts)
574 |> restrict_to_cc(recipients_to, recipients_cc)
579 def upload(file, opts \\ []) do
580 with {:ok, data} <- Upload.store(file, opts) do
583 Map.put(data, "actor", opts[:actor])
588 Repo.insert(%Object{data: obj_data})
592 def user_data_from_user_object(data) do
594 data["icon"]["url"] &&
597 "url" => [%{"href" => data["icon"]["url"]}]
601 data["image"]["url"] &&
604 "url" => [%{"href" => data["image"]["url"]}]
607 locked = data["manuallyApprovesFollowers"] || false
608 data = Transmogrifier.maybe_fix_user_object(data)
613 "ap_enabled" => true,
614 "source_data" => data,
620 follower_address: data["followers"],
624 # nickname can be nil because of virtual actors
626 if data["preferredUsername"] do
630 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
633 Map.put(user_data, :nickname, nil)
639 def fetch_and_prepare_user_from_ap_id(ap_id) do
640 with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
641 user_data_from_user_object(data)
643 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
647 def make_user_from_ap_id(ap_id) do
648 if _user = User.get_by_ap_id(ap_id) do
649 Transmogrifier.upgrade_user_from_ap_id(ap_id)
651 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
652 User.insert_or_update_user(data)
659 def make_user_from_nickname(nickname) do
660 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
661 make_user_from_ap_id(ap_id)
663 _e -> {:error, "No AP id in WebFinger"}
667 def should_federate?(inbox, public) do
671 inbox_info = URI.parse(inbox)
672 !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
676 def publish(actor, activity) do
678 if actor.follower_address in activity.recipients do
679 {:ok, followers} = User.get_followers(actor)
680 followers |> Enum.filter(&(!&1.local))
685 public = is_public?(activity)
688 (Pleroma.Web.Salmon.remote_users(activity) ++ followers)
689 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
690 |> Enum.map(fn %{info: %{source_data: data}} ->
691 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
694 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
696 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
697 json = Jason.encode!(data)
699 Enum.each(remote_inboxes, fn inbox ->
700 Federator.enqueue(:publish_single_ap, %{
704 id: activity.data["id"]
709 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
710 Logger.info("Federating #{id} to #{inbox}")
711 host = URI.parse(inbox).host
713 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
716 Pleroma.Web.HTTPSignatures.sign(actor, %{
718 "content-length": byte_size(json),
726 {"Content-Type", "application/activity+json"},
727 {"signature", signature},
730 hackney: [pool: :default]
735 # This will create a Create activity, which we need internally at the moment.
736 def fetch_object_from_id(id) do
737 if object = Object.get_cached_by_ap_id(id) do
740 Logger.info("Fetching #{id} via AP")
742 with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
743 nil <- Object.normalize(data),
748 "actor" => data["actor"] || data["attributedTo"],
751 :ok <- Transmogrifier.contain_origin(id, params),
752 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
753 {:ok, Object.normalize(activity.data["object"])}
755 {:error, {:reject, nil}} ->
758 object = %Object{} ->
762 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
764 case OStatus.fetch_activity_from_url(id) do
765 {:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
772 def fetch_and_contain_remote_object_from_id(id) do
773 Logger.info("Fetching #{id} via AP")
775 with true <- String.starts_with?(id, "http"),
776 {:ok, %{body: body, status: code}} when code in 200..299 <-
779 [{:Accept, "application/activity+json"}]
781 {:ok, data} <- Jason.decode(body),
782 :ok <- Transmogrifier.contain_origin_from_id(id, data) do
790 def is_public?(activity) do
791 "https://www.w3.org/ns/activitystreams#Public" in (activity.data["to"] ++
792 (activity.data["cc"] || []))
795 def visible_for_user?(activity, nil) do
799 def visible_for_user?(activity, user) do
800 x = [user.ap_id | user.following]
801 y = activity.data["to"] ++ (activity.data["cc"] || [])
802 visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
806 def entire_thread_visible_for_user?(nil, _user), do: false
809 def entire_thread_visible_for_user?(
810 %Activity{data: %{"object" => %{"inReplyTo" => parent_id}}} = tail,
813 when is_binary(parent_id) do
814 parent = Activity.get_in_reply_to_activity(tail)
815 visible_for_user?(tail, user) && entire_thread_visible_for_user?(parent, user)
819 def entire_thread_visible_for_user?(tail, user), do: visible_for_user?(tail, user)
821 # filter out broken threads
822 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
823 entire_thread_visible_for_user?(activity, user)
826 # do post-processing on a specific activity
827 def contain_activity(%Activity{} = activity, %User{} = user) do
828 contain_broken_threads(activity, user)
831 # do post-processing on a timeline
832 def contain_timeline(timeline, user) do
834 |> Enum.filter(fn activity ->
835 contain_activity(activity, user)