defmodule Pleroma.Web.Federator do use GenServer alias Pleroma.User alias Pleroma.Activity alias Pleroma.Web.{WebFinger, Websub} alias Pleroma.Web.ActivityPub.ActivityPub alias Pleroma.Web.ActivityPub.Relay alias Pleroma.Web.ActivityPub.Transmogrifier alias Pleroma.Web.ActivityPub.Utils alias Pleroma.Web.OStatus require Logger @websub Application.get_env(:pleroma, :websub) @ostatus Application.get_env(:pleroma, :ostatus) @httpoison Application.get_env(:pleroma, :httpoison) @max_jobs 20 def init(args) do {:ok, args} end def start_link do spawn(fn -> # 1 minute Process.sleep(1000 * 60 * 1) enqueue(:refresh_subscriptions, nil) end) GenServer.start_link( __MODULE__, %{ in: {:sets.new(), []}, out: {:sets.new(), []} }, name: __MODULE__ ) end def handle(:refresh_subscriptions, _) do Logger.debug("Federator running refresh subscriptions") Websub.refresh_subscriptions() spawn(fn -> # 6 hours Process.sleep(1000 * 60 * 60 * 6) enqueue(:refresh_subscriptions, nil) end) end def handle(: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 handle(:publish, activity) do Logger.debug(fn -> "Running publish for #{activity.data["id"]}" end) with actor when not is_nil(actor) <- User.get_cached_by_ap_id(activity.data["actor"]) do {:ok, actor} = WebFinger.ensure_keys_present(actor) if ActivityPub.is_public?(activity) do if OStatus.is_representable?(activity) do Logger.info(fn -> "Sending #{activity.data["id"]} out via WebSub" end) Websub.publish(Pleroma.Web.OStatus.feed_path(actor), actor, activity) Logger.info(fn -> "Sending #{activity.data["id"]} out via Salmon" end) Pleroma.Web.Salmon.publish(actor, activity) end if Keyword.get(Application.get_env(:pleroma, :instance), :allow_relay) do Logger.info(fn -> "Relaying #{activity.data["id"]} out" end) Relay.publish(activity) end end Logger.info(fn -> "Sending #{activity.data["id"]} out via AP" end) Pleroma.Web.ActivityPub.ActivityPub.publish(actor, activity) end end def handle(:verify_websub, websub) do Logger.debug(fn -> "Running WebSub verification for #{websub.id} (#{websub.topic}, #{websub.callback})" end) @websub.verify(websub) end def handle(:incoming_doc, doc) do Logger.info("Got document, trying to parse") @ostatus.handle_incoming(doc) end def handle(: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 <- Transmogrifier.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(Poison.encode!(params, pretty: 2)) :error end end def handle(:publish_single_ap, params) do ActivityPub.publish_one(params) end def handle(:publish_single_websub, %{xml: xml, topic: topic, callback: callback, secret: secret}) do signature = @websub.sign(secret || "", xml) Logger.debug(fn -> "Pushing #{topic} to #{callback}" end) with {:ok, %{status_code: code}} <- @httpoison.post( callback, xml, [ {"Content-Type", "application/atom+xml"}, {"X-Hub-Signature", "sha1=#{signature}"} ], timeout: 10000, recv_timeout: 20000, hackney: [pool: :default] ) do Logger.debug(fn -> "Pushed to #{callback}, code #{code}" end) else e -> Logger.debug(fn -> "Couldn't push to #{callback}, #{inspect(e)}" end) end end def handle(type, _) do Logger.debug(fn -> "Unknown task: #{type}" end) {:error, "Don't know what to do with this"} end def enqueue(type, payload, priority \\ 1) do if Pleroma.Config.get([:instance, :federating]) do if Mix.env() == :test do handle(type, payload) else GenServer.cast(__MODULE__, {:enqueue, type, payload, priority}) end end end def maybe_start_job(running_jobs, queue) do if :sets.size(running_jobs) < @max_jobs && queue != [] do {{type, payload}, queue} = queue_pop(queue) {:ok, pid} = Task.start(fn -> handle(type, payload) end) mref = Process.monitor(pid) {:sets.add_element(mref, running_jobs), queue} else {running_jobs, queue} end end def handle_cast({:enqueue, type, payload, _priority}, state) when type in [:incoming_doc, :incoming_ap_doc] do %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state i_queue = enqueue_sorted(i_queue, {type, payload}, 1) {i_running_jobs, i_queue} = maybe_start_job(i_running_jobs, i_queue) {:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}} end def handle_cast({:enqueue, type, payload, _priority}, state) do %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state o_queue = enqueue_sorted(o_queue, {type, payload}, 1) {o_running_jobs, o_queue} = maybe_start_job(o_running_jobs, o_queue) {:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}} end def handle_cast(m, state) do IO.inspect("Unknown: #{inspect(m)}, #{inspect(state)}") {:noreply, state} end def handle_info({:DOWN, ref, :process, _pid, _reason}, state) do %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state i_running_jobs = :sets.del_element(ref, i_running_jobs) o_running_jobs = :sets.del_element(ref, o_running_jobs) {i_running_jobs, i_queue} = maybe_start_job(i_running_jobs, i_queue) {o_running_jobs, o_queue} = maybe_start_job(o_running_jobs, o_queue) {:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}} end def enqueue_sorted(queue, element, priority) do [%{item: element, priority: priority} | queue] |> Enum.sort_by(fn %{priority: priority} -> priority end) end def queue_pop([%{item: element} | queue]) do {element, queue} end def ap_enabled_actor(id) do user = User.get_by_ap_id(id) if User.ap_enabled?(user) do {:ok, user} else ActivityPub.make_user_from_ap_id(id) end end end