+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
defmodule Pleroma.Web.ActivityPub.ActivityPub do
alias Pleroma.{Activity, Repo, Object, Upload, User, Notification}
alias Pleroma.Web.ActivityPub.{Transmogrifier, MRF}
@httpoison Application.get_env(:pleroma, :httpoison)
- @instance Application.get_env(:pleroma, :instance)
+ # For Announce activities, we filter the recipients based on following status for any actors
+ # that match actual users. See issue #164 for more information about why this is necessary.
+ defp get_recipients(%{"type" => "Announce"} = data) do
+ to = data["to"] || []
+ cc = data["cc"] || []
+ recipients = to ++ cc
+ actor = User.get_cached_by_ap_id(data["actor"])
+
+ recipients
+ |> Enum.filter(fn recipient ->
+ case User.get_cached_by_ap_id(recipient) do
+ nil ->
+ true
+
+ user ->
+ User.following?(user, actor)
+ end
+ end)
+
+ {recipients, to, cc}
+ end
- def get_recipients(data) do
- (data["to"] || []) ++ (data["cc"] || [])
+ defp get_recipients(data) do
+ to = data["to"] || []
+ cc = data["cc"] || []
+ recipients = to ++ cc
+ {recipients, to, cc}
end
defp check_actor_is_active(actor) do
if not is_nil(actor) do
with user <- User.get_cached_by_ap_id(actor),
- nil <- user.info["deactivated"] do
+ false <- user.info.deactivated do
:ok
else
_e -> :reject
end
end
+ defp check_remote_limit(%{"object" => %{"content" => content}}) do
+ limit = Pleroma.Config.get([:instance, :remote_limit])
+ String.length(content) <= limit
+ end
+
+ defp check_remote_limit(_), do: true
+
def insert(map, local \\ true) when is_map(map) do
with nil <- Activity.normalize(map),
map <- lazy_put_activity_defaults(map),
:ok <- check_actor_is_active(map["actor"]),
+ {_, true} <- {:remote_limit_error, check_remote_limit(map)},
{:ok, map} <- MRF.filter(map),
:ok <- insert_full_object(map) do
+ {recipients, _, _} = get_recipients(map)
+
{:ok, activity} =
Repo.insert(%Activity{
data: map,
local: local,
actor: map["actor"],
- recipients: get_recipients(map)
+ recipients: recipients
})
Notification.create_notifications(activity)
def stream_out(activity) do
public = "https://www.w3.org/ns/activitystreams#Public"
- if activity.data["type"] in ["Create", "Announce"] do
+ if activity.data["type"] in ["Create", "Announce", "Delete"] do
Pleroma.Web.Streamer.stream("user", activity)
Pleroma.Web.Streamer.stream("list", activity)
Pleroma.Web.Streamer.stream("public:local", activity)
end
- if activity.data["object"]["attachment"] != [] do
- Pleroma.Web.Streamer.stream("public:media", activity)
+ if activity.data["type"] in ["Create"] do
+ activity.data["object"]
+ |> Map.get("tag", [])
+ |> Enum.filter(fn tag -> is_bitstring(tag) end)
+ |> Enum.map(fn tag -> Pleroma.Web.Streamer.stream("hashtag:" <> tag, activity) end)
- if activity.local do
- Pleroma.Web.Streamer.stream("public:local:media", activity)
+ if activity.data["object"]["attachment"] != [] do
+ Pleroma.Web.Streamer.stream("public:media", activity)
+
+ if activity.local do
+ Pleroma.Web.Streamer.stream("public:local:media", activity)
+ end
end
end
else
additional
),
{:ok, activity} <- insert(create_data, local),
- :ok <- maybe_federate(activity),
- {:ok, _actor} <- User.increase_note_count(actor) do
+ # Changing note count prior to enqueuing federation task in order to avoid race conditions on updating user.info
+ {:ok, _actor} <- User.increase_note_count(actor),
+ :ok <- maybe_federate(activity) do
{:ok, activity}
end
end
%User{ap_id: _} = user,
%Object{data: %{"id" => _}} = object,
activity_id \\ nil,
- local \\ true
+ local \\ true,
+ public \\ true
) do
with true <- is_public?(object),
- announce_data <- make_announce_data(user, object, activity_id),
+ announce_data <- make_announce_data(user, object, activity_id, public),
{:ok, activity} <- insert(announce_data, local),
{:ok, object} <- add_announce_to_object(activity, object),
:ok <- maybe_federate(activity) do
"to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
}
- with Repo.delete(object),
- Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
+ with {:ok, _} <- Object.delete(object),
{:ok, activity} <- insert(data, local),
- :ok <- maybe_federate(activity),
- {:ok, _actor} <- User.decrease_note_count(user) do
+ # Changing note count prior to enqueuing federation task in order to avoid race conditions on updating user.info
+ {:ok, _actor} <- User.decrease_note_count(user),
+ :ok <- maybe_federate(activity) do
{:ok, activity}
end
end
@valid_visibilities ~w[direct unlisted public private]
- defp restrict_visibility(query, %{visibility: "direct"}) do
- public = "https://www.w3.org/ns/activitystreams#Public"
+ defp restrict_visibility(query, %{visibility: visibility})
+ when visibility in @valid_visibilities do
+ query =
+ from(
+ a in query,
+ where:
+ fragment("activity_visibility(?, ?, ?) = ?", a.actor, a.recipients, a.data, ^visibility)
+ )
- from(
- activity in query,
- join: sender in User,
- on: sender.ap_id == activity.actor,
- # Are non-direct statuses with no to/cc possible?
- where:
- fragment(
- "not (? && ?)",
- [^public, sender.follower_address],
- activity.recipients
- )
- )
+ Ecto.Adapters.SQL.to_sql(:all, Repo, query)
+
+ query
end
defp restrict_visibility(_query, %{visibility: visibility})
|> Map.put("type", ["Create", "Announce"])
|> Map.put("actor_id", user.ap_id)
|> Map.put("whole_db", true)
+ |> Map.put("pinned_activity_ids", user.info.pinned_activities)
recipients =
if reading_user do
|> Enum.reverse()
end
+ defp restrict_since(query, %{"since_id" => ""}), do: query
+
defp restrict_since(query, %{"since_id" => since_id}) do
from(activity in query, where: activity.id > ^since_id)
end
defp restrict_tag(query, _), do: query
+ defp restrict_to_cc(query, recipients_to, recipients_cc) do
+ from(
+ activity in query,
+ where:
+ fragment(
+ "(?->'to' \\?| ?) or (?->'cc' \\?| ?)",
+ activity.data,
+ ^recipients_to,
+ activity.data,
+ ^recipients_cc
+ )
+ )
+ end
+
defp restrict_recipients(query, [], _user), do: query
defp restrict_recipients(query, recipients, nil) do
defp restrict_local(query, _), do: query
+ defp restrict_max(query, %{"max_id" => ""}), do: query
+
defp restrict_max(query, %{"max_id" => max_id}) do
from(activity in query, where: activity.id < ^max_id)
end
defp restrict_replies(query, _), do: query
- # Only search through last 100_000 activities by default
- defp restrict_recent(query, %{"whole_db" => true}), do: query
-
- defp restrict_recent(query, _) do
- since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
-
- from(activity in query, where: activity.id > ^since)
+ defp restrict_reblogs(query, %{"exclude_reblogs" => val}) when val == "true" or val == "1" do
+ from(activity in query, where: fragment("?->>'type' != 'Announce'", activity.data))
end
+ defp restrict_reblogs(query, _), do: query
+
defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
- blocks = info["blocks"] || []
- domain_blocks = info["domain_blocks"] || []
+ blocks = info.blocks || []
+ domain_blocks = info.domain_blocks || []
from(
activity in query,
)
end
+ defp restrict_pinned(query, %{"pinned" => "true", "pinned_activity_ids" => ids}) do
+ from(activity in query, where: activity.id in ^ids)
+ end
+
+ defp restrict_pinned(query, _), do: query
+
def fetch_activities_query(recipients, opts \\ %{}) do
base_query =
from(
|> restrict_actor(opts)
|> restrict_type(opts)
|> restrict_favorited_by(opts)
- |> restrict_recent(opts)
|> restrict_blocked(opts)
|> restrict_media(opts)
|> restrict_visibility(opts)
|> restrict_replies(opts)
+ |> restrict_reblogs(opts)
+ |> restrict_pinned(opts)
end
def fetch_activities(recipients, opts \\ %{}) do
|> Enum.reverse()
end
- def upload(file) do
- data = Upload.store(file, Application.get_env(:pleroma, :instance)[:dedupe_media])
- Repo.insert(%Object{data: data})
+ def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
+ fetch_activities_query([], opts)
+ |> restrict_to_cc(recipients_to, recipients_cc)
+ |> Repo.all()
+ |> Enum.reverse()
+ end
+
+ def upload(file, opts \\ []) do
+ with {:ok, data} <- Upload.store(file, opts) do
+ obj_data =
+ if opts[:actor] do
+ Map.put(data, "actor", opts[:actor])
+ else
+ data
+ end
+
+ Repo.insert(%Object{data: obj_data})
+ end
end
def user_data_from_user_object(data) do
"locked" => locked
},
avatar: avatar,
- nickname: "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}",
name: data["name"],
follower_address: data["followers"],
bio: data["summary"]
}
+ # nickname can be nil because of virtual actors
+ user_data =
+ if data["preferredUsername"] do
+ Map.put(
+ user_data,
+ :nickname,
+ "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}"
+ )
+ else
+ Map.put(user_data, :nickname, nil)
+ end
+
{:ok, user_data}
end
def fetch_and_prepare_user_from_ap_id(ap_id) do
- with {:ok, %{status_code: 200, body: body}} <-
- @httpoison.get(ap_id, Accept: "application/activity+json"),
- {:ok, data} <- Jason.decode(body) do
+ with {:ok, data} <- fetch_and_contain_remote_object_from_id(ap_id) do
user_data_from_user_object(data)
else
e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
end
end
- @quarantined_instances Keyword.get(@instance, :quarantined_instances, [])
-
def should_federate?(inbox, public) do
if public do
true
else
inbox_info = URI.parse(inbox)
- inbox_info.host not in @quarantined_instances
+ !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
end
end
remote_inboxes =
(Pleroma.Web.Salmon.remote_users(activity) ++ followers)
|> Enum.filter(fn user -> User.ap_enabled?(user) end)
- |> Enum.map(fn %{info: %{"source_data" => data}} ->
- (data["endpoints"] && data["endpoints"]["sharedInbox"]) || data["inbox"]
+ |> Enum.map(fn %{info: %{source_data: data}} ->
+ (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
end)
|> Enum.uniq()
|> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
Logger.info("Federating #{id} to #{inbox}")
host = URI.parse(inbox).host
+ digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
+
signature =
- Pleroma.Web.HTTPSignatures.sign(actor, %{host: host, "content-length": byte_size(json)})
+ Pleroma.Web.HTTPSignatures.sign(actor, %{
+ host: host,
+ "content-length": byte_size(json),
+ digest: digest
+ })
@httpoison.post(
inbox,
json,
- [{"Content-Type", "application/activity+json"}, {"signature", signature}],
- hackney: [pool: :default]
+ [
+ {"Content-Type", "application/activity+json"},
+ {"signature", signature},
+ {"digest", digest}
+ ]
)
end
else
Logger.info("Fetching #{id} via AP")
- with true <- String.starts_with?(id, "http"),
- {:ok, %{body: body, status_code: code}} when code in 200..299 <-
- @httpoison.get(
- id,
- [Accept: "application/activity+json"],
- follow_redirect: true,
- timeout: 10000,
- recv_timeout: 20000
- ),
- {:ok, data} <- Jason.decode(body),
+ with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
nil <- Object.normalize(data),
params <- %{
"type" => "Create",
"to" => data["to"],
"cc" => data["cc"],
- "actor" => data["attributedTo"],
+ "actor" => data["actor"] || data["attributedTo"],
"object" => data
},
+ :ok <- Transmogrifier.contain_origin(id, params),
{:ok, activity} <- Transmogrifier.handle_incoming(params) do
{:ok, Object.normalize(activity.data["object"])}
else
+ {:error, {:reject, nil}} ->
+ {:reject, nil}
+
object = %Object{} ->
{:ok, object}
end
end
- def is_public?(activity) do
- "https://www.w3.org/ns/activitystreams#Public" in (activity.data["to"] ++
- (activity.data["cc"] || []))
+ def fetch_and_contain_remote_object_from_id(id) do
+ Logger.info("Fetching #{id} via AP")
+
+ with true <- String.starts_with?(id, "http"),
+ {:ok, %{body: body, status: code}} when code in 200..299 <-
+ @httpoison.get(
+ id,
+ [{:Accept, "application/activity+json"}]
+ ),
+ {:ok, data} <- Jason.decode(body),
+ :ok <- Transmogrifier.contain_origin_from_id(id, data) do
+ {:ok, data}
+ else
+ e ->
+ {:error, e}
+ end
+ end
+
+ def is_public?(%Object{data: %{"type" => "Tombstone"}}), do: false
+ def is_public?(%Object{data: data}), do: is_public?(data)
+ def is_public?(%Activity{data: data}), do: is_public?(data)
+ def is_public?(%{"directMessage" => true}), do: false
+
+ def is_public?(data) do
+ "https://www.w3.org/ns/activitystreams#Public" in (data["to"] ++ (data["cc"] || []))
+ end
+
+ def is_private?(activity) do
+ !is_public?(activity) && Enum.any?(activity.data["to"], &String.contains?(&1, "/followers"))
+ end
+
+ def is_direct?(%Activity{data: %{"directMessage" => true}}), do: true
+ def is_direct?(%Object{data: %{"directMessage" => true}}), do: true
+
+ def is_direct?(activity) do
+ !is_public?(activity) && !is_private?(activity)
end
def visible_for_user?(activity, nil) do
y = activity.data["to"] ++ (activity.data["cc"] || [])
visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
end
+
+ # guard
+ def entire_thread_visible_for_user?(nil, _user), do: false
+
+ # child
+ def entire_thread_visible_for_user?(
+ %Activity{data: %{"object" => %{"inReplyTo" => parent_id}}} = tail,
+ user
+ )
+ when is_binary(parent_id) do
+ parent = Activity.get_in_reply_to_activity(tail)
+ visible_for_user?(tail, user) && entire_thread_visible_for_user?(parent, user)
+ end
+
+ # root
+ def entire_thread_visible_for_user?(tail, user), do: visible_for_user?(tail, user)
+
+ # filter out broken threads
+ def contain_broken_threads(%Activity{} = activity, %User{} = user) do
+ entire_thread_visible_for_user?(activity, user)
+ end
+
+ # do post-processing on a specific activity
+ def contain_activity(%Activity{} = activity, %User{} = user) do
+ contain_broken_threads(activity, user)
+ end
+
+ # do post-processing on a timeline
+ def contain_timeline(timeline, user) do
+ timeline
+ |> Enum.filter(fn activity ->
+ contain_activity(activity, user)
+ end)
+ end
end
projects / akkoma / blobdiff