1 defmodule Pleroma.Web.ActivityPub.ActivityPub do
2 alias Pleroma.{Activity, Repo, Object, Upload, User, Notification}
3 alias Pleroma.Web.ActivityPub.{Transmogrifier, MRF}
4 alias Pleroma.Web.WebFinger
5 alias Pleroma.Web.Federator
6 alias Pleroma.Web.OStatus
8 import Pleroma.Web.ActivityPub.Utils
11 @httpoison Application.get_env(:pleroma, :httpoison)
13 @instance Application.get_env(:pleroma, :instance)
15 # For Announce activities, we filter the recipients based on following status for any actors
16 # that match actual users. See issue #164 for more information about why this is necessary.
17 defp get_recipients(%{"type" => "Announce"} = data) do
21 actor = User.get_cached_by_ap_id(data["actor"])
24 |> Enum.filter(fn recipient ->
25 case User.get_cached_by_ap_id(recipient) do
30 User.following?(user, actor)
37 defp get_recipients(data) do
44 defp check_actor_is_active(actor) do
45 if not is_nil(actor) do
46 with user <- User.get_cached_by_ap_id(actor),
47 false <- !!user.info["deactivated"] do
57 def insert(map, local \\ true) when is_map(map) do
58 with nil <- Activity.normalize(map),
59 map <- lazy_put_activity_defaults(map),
60 :ok <- check_actor_is_active(map["actor"]),
61 {:ok, map} <- MRF.filter(map),
62 :ok <- insert_full_object(map) do
63 {recipients, _, _} = get_recipients(map)
66 Repo.insert(%Activity{
70 recipients: recipients
73 Notification.create_notifications(activity)
77 %Activity{} = activity -> {:ok, activity}
78 error -> {:error, error}
82 def stream_out(activity) do
83 public = "https://www.w3.org/ns/activitystreams#Public"
85 if activity.data["type"] in ["Create", "Announce"] do
86 Pleroma.Web.Streamer.stream("user", activity)
87 Pleroma.Web.Streamer.stream("list", activity)
89 if Enum.member?(activity.data["to"], public) do
90 Pleroma.Web.Streamer.stream("public", activity)
93 Pleroma.Web.Streamer.stream("public:local", activity)
96 activity.data["object"]
98 |> Enum.filter(fn tag -> is_bitstring(tag) end)
99 |> Enum.map(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
101 if activity.data["object"]["attachment"] != [] do
102 Pleroma.Web.Streamer.stream("public:media", activity)
105 Pleroma.Web.Streamer.stream("public:local:media", activity)
109 if !Enum.member?(activity.data["cc"] || [], public) &&
112 User.get_by_ap_id(activity.data["actor"]).follower_address
114 do: Pleroma.Web.Streamer.stream("direct", activity)
119 def create(%{to: to, actor: actor, context: context, object: object} = params) do
120 additional = params[:additional] || %{}
121 # only accept false as false value
122 local = !(params[:local] == false)
123 published = params[:published]
127 %{to: to, actor: actor, published: published, context: context, object: object},
130 {:ok, activity} <- insert(create_data, local),
131 :ok <- maybe_federate(activity),
132 {:ok, _actor} <- User.increase_note_count(actor) do
137 def accept(%{to: to, actor: actor, object: object} = params) do
138 # only accept false as false value
139 local = !(params[:local] == false)
141 with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
142 {:ok, activity} <- insert(data, local),
143 :ok <- maybe_federate(activity) do
148 def reject(%{to: to, actor: actor, object: object} = params) do
149 # only accept false as false value
150 local = !(params[:local] == false)
152 with data <- %{"to" => to, "type" => "Reject", "actor" => actor, "object" => object},
153 {:ok, activity} <- insert(data, local),
154 :ok <- maybe_federate(activity) do
159 def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
160 # only accept false as false value
161 local = !(params[:local] == false)
170 {:ok, activity} <- insert(data, local),
171 :ok <- maybe_federate(activity) do
176 # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
178 %User{ap_id: ap_id} = user,
179 %Object{data: %{"id" => _}} = object,
183 with nil <- get_existing_like(ap_id, object),
184 like_data <- make_like_data(user, object, activity_id),
185 {:ok, activity} <- insert(like_data, local),
186 {:ok, object} <- add_like_to_object(activity, object),
187 :ok <- maybe_federate(activity) do
188 {:ok, activity, object}
190 %Activity{} = activity -> {:ok, activity, object}
191 error -> {:error, error}
201 with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
202 unlike_data <- make_unlike_data(actor, like_activity, activity_id),
203 {:ok, unlike_activity} <- insert(unlike_data, local),
204 {:ok, _activity} <- Repo.delete(like_activity),
205 {:ok, object} <- remove_like_from_object(like_activity, object),
206 :ok <- maybe_federate(unlike_activity) do
207 {:ok, unlike_activity, like_activity, object}
214 %User{ap_id: _} = user,
215 %Object{data: %{"id" => _}} = object,
219 with true <- is_public?(object),
220 announce_data <- make_announce_data(user, object, activity_id),
221 {:ok, activity} <- insert(announce_data, local),
222 {:ok, object} <- add_announce_to_object(activity, object),
223 :ok <- maybe_federate(activity) do
224 {:ok, activity, object}
226 error -> {:error, error}
236 with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
237 unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
238 {:ok, unannounce_activity} <- insert(unannounce_data, local),
239 :ok <- maybe_federate(unannounce_activity),
240 {:ok, _activity} <- Repo.delete(announce_activity),
241 {:ok, object} <- remove_announce_from_object(announce_activity, object) do
242 {:ok, unannounce_activity, object}
248 def follow(follower, followed, activity_id \\ nil, local \\ true) do
249 with data <- make_follow_data(follower, followed, activity_id),
250 {:ok, activity} <- insert(data, local),
251 :ok <- maybe_federate(activity) do
256 def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
257 with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
258 {:ok, follow_activity} <- update_follow_state(follow_activity, "cancelled"),
259 unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
260 {:ok, activity} <- insert(unfollow_data, local),
261 :ok <- maybe_federate(activity) do
266 def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
267 user = User.get_cached_by_ap_id(actor)
273 "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
276 with {:ok, _} <- Object.delete(object),
277 {:ok, activity} <- insert(data, local),
278 :ok <- maybe_federate(activity),
279 {:ok, _actor} <- User.decrease_note_count(user) do
284 def block(blocker, blocked, activity_id \\ nil, local \\ true) do
285 ap_config = Application.get_env(:pleroma, :activitypub)
286 unfollow_blocked = Keyword.get(ap_config, :unfollow_blocked)
287 outgoing_blocks = Keyword.get(ap_config, :outgoing_blocks)
289 with true <- unfollow_blocked do
290 follow_activity = fetch_latest_follow(blocker, blocked)
292 if follow_activity do
293 unfollow(blocker, blocked, nil, local)
297 with true <- outgoing_blocks,
298 block_data <- make_block_data(blocker, blocked, activity_id),
299 {:ok, activity} <- insert(block_data, local),
300 :ok <- maybe_federate(activity) do
307 def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
308 with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
309 unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
310 {:ok, activity} <- insert(unblock_data, local),
311 :ok <- maybe_federate(activity) do
316 def fetch_activities_for_context(context, opts \\ %{}) do
317 public = ["https://www.w3.org/ns/activitystreams#Public"]
320 if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
322 query = from(activity in Activity)
326 |> restrict_blocked(opts)
327 |> restrict_recipients(recipients, opts["user"])
334 "?->>'type' = ? and ?->>'context' = ?",
340 order_by: [desc: :id]
346 def fetch_public_activities(opts \\ %{}) do
347 q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
350 |> restrict_unlisted()
355 @valid_visibilities ~w[direct unlisted public private]
357 defp restrict_visibility(query, %{visibility: "direct"}) do
358 public = "https://www.w3.org/ns/activitystreams#Public"
362 join: sender in User,
363 on: sender.ap_id == activity.actor,
364 # Are non-direct statuses with no to/cc possible?
368 [^public, sender.follower_address],
374 defp restrict_visibility(_query, %{visibility: visibility})
375 when visibility not in @valid_visibilities do
376 Logger.error("Could not restrict visibility to #{visibility}")
379 defp restrict_visibility(query, _visibility), do: query
381 def fetch_user_activities(user, reading_user, params \\ %{}) do
384 |> Map.put("type", ["Create", "Announce"])
385 |> Map.put("actor_id", user.ap_id)
386 |> Map.put("whole_db", true)
390 ["https://www.w3.org/ns/activitystreams#Public"] ++
391 [reading_user.ap_id | reading_user.following]
393 ["https://www.w3.org/ns/activitystreams#Public"]
396 fetch_activities(recipients, params)
400 defp restrict_since(query, %{"since_id" => since_id}) do
401 from(activity in query, where: activity.id > ^since_id)
404 defp restrict_since(query, _), do: query
406 defp restrict_tag(query, %{"tag" => tag}) do
409 where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
413 defp restrict_tag(query, _), do: query
415 defp restrict_to_cc(query, recipients_to, recipients_cc) do
420 "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
429 defp restrict_recipients(query, [], _user), do: query
431 defp restrict_recipients(query, recipients, nil) do
432 from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
435 defp restrict_recipients(query, recipients, user) do
438 where: fragment("? && ?", ^recipients, activity.recipients),
439 or_where: activity.actor == ^user.ap_id
443 defp restrict_limit(query, %{"limit" => limit}) do
444 from(activity in query, limit: ^limit)
447 defp restrict_limit(query, _), do: query
449 defp restrict_local(query, %{"local_only" => true}) do
450 from(activity in query, where: activity.local == true)
453 defp restrict_local(query, _), do: query
455 defp restrict_max(query, %{"max_id" => max_id}) do
456 from(activity in query, where: activity.id < ^max_id)
459 defp restrict_max(query, _), do: query
461 defp restrict_actor(query, %{"actor_id" => actor_id}) do
462 from(activity in query, where: activity.actor == ^actor_id)
465 defp restrict_actor(query, _), do: query
467 defp restrict_type(query, %{"type" => type}) when is_binary(type) do
468 restrict_type(query, %{"type" => [type]})
471 defp restrict_type(query, %{"type" => type}) do
472 from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
475 defp restrict_type(query, _), do: query
477 defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
480 where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
484 defp restrict_favorited_by(query, _), do: query
486 defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
489 where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
493 defp restrict_media(query, _), do: query
495 defp restrict_replies(query, %{"exclude_replies" => val}) when val == "true" or val == "1" do
498 where: fragment("?->'object'->>'inReplyTo' is null", activity.data)
502 defp restrict_replies(query, _), do: query
504 # Only search through last 100_000 activities by default
505 defp restrict_recent(query, %{"whole_db" => true}), do: query
507 defp restrict_recent(query, _) do
508 since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
510 from(activity in query, where: activity.id > ^since)
513 defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
514 blocks = info["blocks"] || []
515 domain_blocks = info["domain_blocks"] || []
519 where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
520 where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks),
521 where: fragment("not (split_part(?, '/', 3) = ANY(?))", activity.actor, ^domain_blocks)
525 defp restrict_blocked(query, _), do: query
527 defp restrict_unlisted(query) do
532 "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
534 ^["https://www.w3.org/ns/activitystreams#Public"]
539 def fetch_activities_query(recipients, opts \\ %{}) do
542 activity in Activity,
544 order_by: [fragment("? desc nulls last", activity.id)]
548 |> restrict_recipients(recipients, opts["user"])
549 |> restrict_tag(opts)
550 |> restrict_since(opts)
551 |> restrict_local(opts)
552 |> restrict_limit(opts)
553 |> restrict_max(opts)
554 |> restrict_actor(opts)
555 |> restrict_type(opts)
556 |> restrict_favorited_by(opts)
557 |> restrict_recent(opts)
558 |> restrict_blocked(opts)
559 |> restrict_media(opts)
560 |> restrict_visibility(opts)
561 |> restrict_replies(opts)
564 def fetch_activities(recipients, opts \\ %{}) do
565 fetch_activities_query(recipients, opts)
570 def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
571 fetch_activities_query([], opts)
572 |> restrict_to_cc(recipients_to, recipients_cc)
577 def upload(file, size_limit \\ nil) do
579 Upload.store(file, Application.get_env(:pleroma, :instance)[:dedupe_media], size_limit),
580 false <- is_nil(data) do
581 Repo.insert(%Object{data: data})
585 def user_data_from_user_object(data) do
587 data["icon"]["url"] &&
590 "url" => [%{"href" => data["icon"]["url"]}]
594 data["image"]["url"] &&
597 "url" => [%{"href" => data["image"]["url"]}]
600 locked = data["manuallyApprovesFollowers"] || false
601 data = Transmogrifier.maybe_fix_user_object(data)
606 "ap_enabled" => true,
607 "source_data" => data,
613 follower_address: data["followers"],
617 # nickname can be nil because of virtual actors
619 if data["preferredUsername"] do
623 "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
626 Map.put(user_data, :nickname, nil)
632 def fetch_and_prepare_user_from_ap_id(ap_id) do
633 with {:ok, %{status_code: 200, body: body}} <-
634 @httpoison.get(ap_id, [Accept: "application/activity+json"], follow_redirect: true),
635 {:ok, data} <- Jason.decode(body) do
636 user_data_from_user_object(data)
638 e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
642 def make_user_from_ap_id(ap_id) do
643 if _user = User.get_by_ap_id(ap_id) do
644 Transmogrifier.upgrade_user_from_ap_id(ap_id)
646 with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
647 User.insert_or_update_user(data)
654 def make_user_from_nickname(nickname) do
655 with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
656 make_user_from_ap_id(ap_id)
658 _e -> {:error, "No AP id in WebFinger"}
662 @quarantined_instances Keyword.get(@instance, :quarantined_instances, [])
664 def should_federate?(inbox, public) do
668 inbox_info = URI.parse(inbox)
669 inbox_info.host not in @quarantined_instances
673 def publish(actor, activity) do
675 if actor.follower_address in activity.recipients do
676 {:ok, followers} = User.get_followers(actor)
677 followers |> Enum.filter(&(!&1.local))
682 public = is_public?(activity)
685 (Pleroma.Web.Salmon.remote_users(activity) ++ followers)
686 |> Enum.filter(fn user -> User.ap_enabled?(user) end)
687 |> Enum.map(fn %{info: %{"source_data" => data}} ->
688 (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
691 |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
693 {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
694 json = Jason.encode!(data)
696 Enum.each(remote_inboxes, fn inbox ->
697 Federator.enqueue(:publish_single_ap, %{
701 id: activity.data["id"]
706 def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
707 Logger.info("Federating #{id} to #{inbox}")
708 host = URI.parse(inbox).host
710 digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
713 Pleroma.Web.HTTPSignatures.sign(actor, %{
715 "content-length": byte_size(json),
723 {"Content-Type", "application/activity+json"},
724 {"signature", signature},
727 hackney: [pool: :default]
732 # This will create a Create activity, which we need internally at the moment.
733 def fetch_object_from_id(id) do
734 if object = Object.get_cached_by_ap_id(id) do
737 Logger.info("Fetching #{id} via AP")
739 with true <- String.starts_with?(id, "http"),
740 {:ok, %{body: body, status_code: code}} when code in 200..299 <-
743 [Accept: "application/activity+json"],
744 follow_redirect: true,
748 {:ok, data} <- Jason.decode(body),
749 nil <- Object.normalize(data),
754 "actor" => data["attributedTo"],
757 :ok <- Transmogrifier.contain_origin(id, params),
758 {:ok, activity} <- Transmogrifier.handle_incoming(params) do
759 {:ok, Object.normalize(activity.data["object"])}
761 {:error, {:reject, nil}} ->
764 object = %Object{} ->
768 Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
770 case OStatus.fetch_activity_from_url(id) do
771 {:ok, [activity | _]} -> {:ok, Object.normalize(activity.data["object"])}
778 def is_public?(activity) do
779 "https://www.w3.org/ns/activitystreams#Public" in (activity.data["to"] ++
780 (activity.data["cc"] || []))
783 def visible_for_user?(activity, nil) do
787 def visible_for_user?(activity, user) do
788 x = [user.ap_id | user.following]
789 y = activity.data["to"] ++ (activity.data["cc"] || [])
790 visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
794 def entire_thread_visible_for_user?(nil, user), do: false
797 def entire_thread_visible_for_user?(
798 %Activity{data: %{"object" => %{"inReplyTo" => parent_id}}} = tail,
801 when is_binary(parent_id) do
802 parent = Activity.get_in_reply_to_activity(tail)
803 visible_for_user?(tail, user) && entire_thread_visible_for_user?(parent, user)
807 def entire_thread_visible_for_user?(tail, user), do: visible_for_user?(tail, user)
809 # filter out broken threads
810 def contain_broken_threads(%Activity{} = activity, %User{} = user) do
811 entire_thread_visible_for_user?(activity, user)
814 # do post-processing on a specific activity
815 def contain_activity(%Activity{} = activity, %User{} = user) do
816 contain_broken_threads(activity, user)
819 # do post-processing on a timeline
820 def contain_timeline(timeline, user) do
822 |> Enum.filter(fn activity ->
823 contain_activity(activity, user)