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# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.Federator do
alias Pleroma.Activity
alias Pleroma.Object.Containment
alias Pleroma.User
alias Pleroma.Web.ActivityPub.ActivityPub
alias Pleroma.Web.ActivityPub.Transmogrifier
alias Pleroma.Web.ActivityPub.Utils
alias Pleroma.Web.Federator.Publisher
alias Pleroma.Web.Federator.RetryQueue
alias Pleroma.Web.OStatus
alias Pleroma.Web.Websub
require Logger
def init do
# 1 minute
Process.sleep(1000 * 60)
refresh_subscriptions()
end
@doc "Addresses [memory leaks on recursive replies fetching](https://git.pleroma.social/pleroma/pleroma/issues/161)"
# credo:disable-for-previous-line Credo.Check.Readability.MaxLineLength
def allowed_incoming_reply_depth?(depth) do
max_replies_depth = Pleroma.Config.get([:instance, :federation_incoming_replies_max_depth])
if max_replies_depth do
(depth || 1) <= max_replies_depth
else
true
end
end
# Client API
def incoming_doc(doc) do
PleromaJobQueue.enqueue(:federator_incoming, __MODULE__, [:incoming_doc, doc])
end
def incoming_ap_doc(params) do
PleromaJobQueue.enqueue(:federator_incoming, __MODULE__, [:incoming_ap_doc, params])
end
def publish(activity, priority \\ 1) do
PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:publish, activity], priority)
end
def verify_websub(websub) do
PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:verify_websub, websub])
end
def request_subscription(sub) do
PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:request_subscription, sub])
end
def refresh_subscriptions do
PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:refresh_subscriptions])
end
# Job Worker Callbacks
def perform(:refresh_subscriptions) do
Logger.debug("Federator running refresh subscriptions")
Websub.refresh_subscriptions()
spawn(fn ->
# 6 hours
Process.sleep(1000 * 60 * 60 * 6)
refresh_subscriptions()
end)
end
def perform(:request_subscription, websub) do
Logger.debug("Refreshing #{websub.topic}")
with {:ok, websub} <- Websub.request_subscription(websub) do
Logger.debug("Successfully refreshed #{websub.topic}")
else
_e -> Logger.debug("Couldn't refresh #{websub.topic}")
end
end
def perform(:publish, activity) do
Logger.debug(fn -> "Running publish for #{activity.data["id"]}" end)
with %User{} = actor <- User.get_cached_by_ap_id(activity.data["actor"]),
{:ok, actor} <- User.ensure_keys_present(actor) do
Publisher.publish(actor, activity)
end
end
def perform(:verify_websub, websub) do
Logger.debug(fn ->
"Running WebSub verification for #{websub.id} (#{websub.topic}, #{websub.callback})"
end)
Websub.verify(websub)
end
def perform(:incoming_doc, doc) do
Logger.info("Got document, trying to parse")
OStatus.handle_incoming(doc)
end
def perform(:incoming_ap_doc, params) do
Logger.info("Handling incoming AP activity")
params = Utils.normalize_params(params)
# NOTE: we use the actor ID to do the containment, this is fine because an
# actor shouldn't be acting on objects outside their own AP server.
with {:ok, _user} <- ap_enabled_actor(params["actor"]),
nil <- Activity.normalize(params["id"]),
:ok <- Containment.contain_origin_from_id(params["actor"], params),
{:ok, activity} <- Transmogrifier.handle_incoming(params) do
{:ok, activity}
else
%Activity{} ->
Logger.info("Already had #{params["id"]}")
:error
_e ->
# Just drop those for now
Logger.info("Unhandled activity")
Logger.info(Jason.encode!(params, pretty: true))
:error
end
end
def perform(
:publish_single_websub,
%{xml: _xml, topic: _topic, callback: _callback, secret: _secret} = params
) do
case Websub.publish_one(params) do
{:ok, _} ->
:ok
{:error, _} ->
RetryQueue.enqueue(params, Websub)
end
end
def perform(type, _) do
Logger.debug(fn -> "Unknown task: #{type}" end)
{:error, "Don't know what to do with this"}
end
def ap_enabled_actor(id) do
user = User.get_cached_by_ap_id(id)
if User.ap_enabled?(user) do
{:ok, user}
else
ActivityPub.make_user_from_ap_id(id)
end
end
end
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