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"] 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 activity.data["object"]
107 |> Map.get("tag", [])
108 |> Enum.filter(fn tag -> is_bitstring(tag) end)
109 |> Enum.map(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
111 if activity.data["object"]["attachment"] != [] do
112 Pleroma.Web.Streamer.stream("public:media", activity)
115 Pleroma.Web.Streamer.stream("public:local:media", activity)
119 if !Enum.member?(activity.data["cc"] || [], public) &&
122 User.get_by_ap_id(activity.data["actor"]).follower_address
124 do: Pleroma.Web.Streamer.stream("direct", activity)
129 def create(%{to: to, actor: actor, context: context, object: object} = params) do
130 additional = params[:additional] || %{}
131 # only accept false as false value
132 local = !(params[:local] == false)
133 published = params[:published]
137 %{to: to, actor: actor, published: published, context: context, object: object},
140 {:ok, activity} <- insert(create_data, local),
141 :ok <- maybe_federate(activity),
142 {:ok, _actor} <- User.increase_note_count(actor) do
147 def accept(%{to: to, actor: actor, object: object} = params) do
148 # only accept false as false value
149 local = !(params[:local] == false)
151 with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
152 {:ok, activity} <- insert(data, local),
153 :ok <- maybe_federate(activity) do
158 def reject(%{to: to, actor: actor, object: object} = params) do
159 # only accept false as false value
160 local = !(params[:local] == false)
162 with data <- %{"to" => to, "type" => "Reject", "actor" => actor, "object" => object},
163 {:ok, activity} <- insert(data, local),
164 :ok <- maybe_federate(activity) do
169 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
170 # only accept false as false value
171 local = !(params[:local] == false)
180 {:ok, activity} <- insert(data, local),
181 :ok <- maybe_federate(activity) do
186 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
188 %User{ap_id: ap_id} = user,
189 %Object{data: %{"id" => _}} = object,
193 with nil <- get_existing_like(ap_id, object),
194 like_data <- make_like_data(user, object, activity_id),
195 {:ok, activity} <- insert(like_data, local),
196 {:ok, object} <- add_like_to_object(activity, object),
197 :ok <- maybe_federate(activity) do
198 {:ok, activity, object}
200 %Activity{} = activity -> {:ok, activity, object}
201 error -> {:error, error}
211 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
212 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
213 {:ok, unlike_activity} <- insert(unlike_data, local),
214 {:ok, _activity} <- Repo.delete(like_activity),
215 {:ok, object} <- remove_like_from_object(like_activity, object),
216 :ok <- maybe_federate(unlike_activity) do
217 {:ok, unlike_activity, like_activity, object}
224 %User{ap_id: _} = user,
225 %Object{data: %{"id" => _}} = object,
229 with true <- is_public?(object),
230 announce_data <- make_announce_data(user, object, activity_id),
231 {:ok, activity} <- insert(announce_data, local),
232 {:ok, object} <- add_announce_to_object(activity, object),
233 :ok <- maybe_federate(activity) do
234 {:ok, activity, object}
236 error -> {:error, error}
246 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
247 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
248 {:ok, unannounce_activity} <- insert(unannounce_data, local),
249 :ok <- maybe_federate(unannounce_activity),
250 {:ok, _activity} <- Repo.delete(announce_activity),
251 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
252 {:ok, unannounce_activity, object}
258 def follow(follower, followed, activity_id \\ nil, local \\ true) do
259 with data <- make_follow_data(follower, followed, activity_id),
260 {:ok, activity} <- insert(data, local),
261 :ok <- maybe_federate(activity) do
266 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
267 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
268 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
269 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
270 {:ok, activity} <- insert(unfollow_data, local),
271 :ok <- maybe_federate(activity) do
276 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
277 user = User.get_cached_by_ap_id(actor)
283 "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
286 with {:ok, _} <- Object.delete(object),
287 {:ok, activity} <- insert(data, local),
288 :ok <- maybe_federate(activity),
289 {:ok, _actor} <- User.decrease_note_count(user) do
294 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
295 ap_config = Application.get_env(:pleroma, :activitypub)
296 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
297 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
299 with true <- unfollow_blocked do
300 follow_activity = fetch_latest_follow(blocker, blocked)
302 if follow_activity do
303 unfollow(blocker, blocked, nil, local)
307 with true <- outgoing_blocks,
308 block_data <- make_block_data(blocker, blocked, activity_id),
309 {:ok, activity} <- insert(block_data, local),
310 :ok <- maybe_federate(activity) do
317 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
318 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
319 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
320 {:ok, activity} <- insert(unblock_data, local),
321 :ok <- maybe_federate(activity) do
326 def fetch_activities_for_context(context, opts \\ %{}) do
327 public = ["https://www.w3.org/ns/activitystreams#Public"]
330 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
332 query = from(activity in Activity)
336 |> restrict_blocked(opts)
337 |> restrict_recipients(recipients, opts["user"])
344 "?->>'type' = ? and ?->>'context' = ?",
350 order_by: [desc: :id]
356 def fetch_public_activities(opts \\ %{}) do
357 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
360 |> restrict_unlisted()
365 @valid_visibilities ~w[direct unlisted public private]
367 defp restrict_visibility(query, %{visibility: "direct"}) do
368 public = "https://www.w3.org/ns/activitystreams#Public"
372 join: sender in User,
373 on: sender.ap_id == activity.actor,
374 # Are non-direct statuses with no to/cc possible?
378 [^public, sender.follower_address],
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)
400 ["https://www.w3.org/ns/activitystreams#Public"] ++
401 [reading_user.ap_id | reading_user.following]
403 ["https://www.w3.org/ns/activitystreams#Public"]
406 fetch_activities(recipients, params)
410 defp restrict_since(query, %{"since_id" => since_id}) do
411 from(activity in query, where: activity.id > ^since_id)
414 defp restrict_since(query, _), do: query
416 defp restrict_tag(query, %{"tag" => tag}) do
419 where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
423 defp restrict_tag(query, _), do: query
425 defp restrict_to_cc(query, recipients_to, recipients_cc) do
430 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
439 defp restrict_recipients(query, [], _user), do: query
441 defp restrict_recipients(query, recipients, nil) do
442 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
445 defp restrict_recipients(query, recipients, user) do
448 where: fragment("? && ?", ^recipients, activity.recipients),
449 or_where: activity.actor == ^user.ap_id
453 defp restrict_limit(query, %{"limit" => limit}) do
454 from(activity in query, limit: ^limit)
457 defp restrict_limit(query, _), do: query
459 defp restrict_local(query, %{"local_only" => true}) do
460 from(activity in query, where: activity.local == true)
463 defp restrict_local(query, _), do: query
465 defp restrict_max(query, %{"max_id" => max_id}) do
466 from(activity in query, where: activity.id < ^max_id)
469 defp restrict_max(query, _), do: query
471 defp restrict_actor(query, %{"actor_id" => actor_id}) do
472 from(activity in query, where: activity.actor == ^actor_id)
475 defp restrict_actor(query, _), do: query
477 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
478 restrict_type(query, %{"type" => [type]})
481 defp restrict_type(query, %{"type" => type}) do
482 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
485 defp restrict_type(query, _), do: query
487 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
490 where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
494 defp restrict_favorited_by(query, _), do: query
496 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
499 where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
503 defp restrict_media(query, _), do: query
505 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
508 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
512 defp restrict_replies(query, _), do: query
514 defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
515 from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
518 defp restrict_reblogs(query, _), do: query
520 # Only search through last 100_000 activities by default
521 defp restrict_recent(query, %{"whole_db" => true}), do: query
523 defp restrict_recent(query, _) do
524 since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
526 from(activity in query, where: activity.id > ^since)
529 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
530 blocks = info.blocks || []
531 domain_blocks = info.domain_blocks || []
535 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
536 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
537 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
541 defp restrict_blocked(query, _), do: query
543 defp restrict_unlisted(query) do
548 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
550 ^["https://www.w3.org/ns/activitystreams#Public"]
555 def fetch_activities_query(recipients, opts \\ %{}) do
558 activity in Activity,
560 order_by: [fragment("? desc nulls last", activity.id)]
564 |> restrict_recipients(recipients, opts["user"])
565 |> restrict_tag(opts)
566 |> restrict_since(opts)
567 |> restrict_local(opts)
568 |> restrict_limit(opts)
569 |> restrict_max(opts)
570 |> restrict_actor(opts)
571 |> restrict_type(opts)
572 |> restrict_favorited_by(opts)
573 |> restrict_recent(opts)
574 |> restrict_blocked(opts)
575 |> restrict_media(opts)
576 |> restrict_visibility(opts)
577 |> restrict_replies(opts)
578 |> restrict_reblogs(opts)
581 def fetch_activities(recipients, opts \\ %{}) do
582 fetch_activities_query(recipients, opts)
587 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
588 fetch_activities_query([], opts)
589 |> restrict_to_cc(recipients_to, recipients_cc)
594 def upload(file, opts \\ []) do
595 with {:ok, data} <- Upload.store(file, opts) do
598 Map.put(data, "actor", opts[:actor])
603 Repo.insert(%Object{data: obj_data})
607 def user_data_from_user_object(data) do
609 data["icon"]["url"] &&
612 "url" => [%{"href" => data["icon"]["url"]}]
616 data["image"]["url"] &&
619 "url" => [%{"href" => data["image"]["url"]}]
622 locked = data["manuallyApprovesFollowers"] || false
623 data = Transmogrifier.maybe_fix_user_object(data)
628 "ap_enabled" => true,
629 "source_data" => data,
635 follower_address: data["followers"],
639 # nickname can be nil because of virtual actors
641 if data["preferredUsername"] do
645 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
648 Map.put(user_data, :nickname, nil)
654 def fetch_and_prepare_user_from_ap_id(ap_id) do
655 with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
656 user_data_from_user_object(data)
658 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
662 def make_user_from_ap_id(ap_id) do
663 if _user = User.get_by_ap_id(ap_id) do
664 Transmogrifier.upgrade_user_from_ap_id(ap_id)
666 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
667 User.insert_or_update_user(data)
674 def make_user_from_nickname(nickname) do
675 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
676 make_user_from_ap_id(ap_id)
678 _e -> {:error, "No AP id in WebFinger"}
682 def should_federate?(inbox, public) do
686 inbox_info = URI.parse(inbox)
687 !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
691 def publish(actor, activity) do
693 if actor.follower_address in activity.recipients do
694 {:ok, followers} = User.get_followers(actor)
695 followers |> Enum.filter(&(!&1.local))
700 public = is_public?(activity)
703 (Pleroma.Web.Salmon.remote_users(activity) ++ followers)
704 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
705 |> Enum.map(fn %{info: %{source_data: data}} ->
706 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
709 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
711 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
712 json = Jason.encode!(data)
714 Enum.each(remote_inboxes, fn inbox ->
715 Federator.enqueue(:publish_single_ap, %{
719 id: activity.data["id"]
724 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
725 Logger.info("Federating #{id} to #{inbox}")
726 host = URI.parse(inbox).host
728 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
731 Pleroma.Web.HTTPSignatures.sign(actor, %{
733 "content-length": byte_size(json),
741 {"Content-Type", "application/activity+json"},
742 {"signature", signature},
749 # This will create a Create activity, which we need internally at the moment.
750 def fetch_object_from_id(id) do
751 if object = Object.get_cached_by_ap_id(id) do
754 Logger.info("Fetching #{id} via AP")
756 with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
757 nil <- Object.normalize(data),
762 "actor" => data["actor"] || data["attributedTo"],
765 :ok <- Transmogrifier.contain_origin(id, params),
766 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
767 {:ok, Object.normalize(activity.data["object"])}
769 {:error, {:reject, nil}} ->
772 object = %Object{} ->
776 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
778 case OStatus.fetch_activity_from_url(id) do
779 {:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
786 def fetch_and_contain_remote_object_from_id(id) do
787 Logger.info("Fetching #{id} via AP")
789 with true <- String.starts_with?(id, "http"),
790 {:ok, %{body: body, status: code}} when code in 200..299 <-
793 [{:Accept, "application/activity+json"}]
795 {:ok, data} <- Jason.decode(body),
796 :ok <- Transmogrifier.contain_origin_from_id(id, data) do
804 def is_public?(%Object{data: %{"type" => "Tombstone"}}) do
808 def is_public?(activity) do
809 "https://www.w3.org/ns/activitystreams#Public" in (activity.data["to"] ++
810 (activity.data["cc"] || []))
813 def visible_for_user?(activity, nil) do
817 def visible_for_user?(activity, user) do
818 x = [user.ap_id | user.following]
819 y = activity.data["to"] ++ (activity.data["cc"] || [])
820 visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
824 def entire_thread_visible_for_user?(nil, _user), do: false
827 def entire_thread_visible_for_user?(
828 %Activity{data: %{"object" => %{"inReplyTo" => parent_id}}} = tail,
831 when is_binary(parent_id) do
832 parent = Activity.get_in_reply_to_activity(tail)
833 visible_for_user?(tail, user) && entire_thread_visible_for_user?(parent, user)
837 def entire_thread_visible_for_user?(tail, user), do: visible_for_user?(tail, user)
839 # filter out broken threads
840 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
841 entire_thread_visible_for_user?(activity, user)
844 # do post-processing on a specific activity
845 def contain_activity(%Activity{} = activity, %User{} = user) do
846 contain_broken_threads(activity, user)
849 # do post-processing on a timeline
850 def contain_timeline(timeline, user) do
852 |> Enum.filter(fn activity ->
853 contain_activity(activity, user)