git.squeep.com Git - akkoma/blob - lib/pleroma/web/federator/federator.ex

   1 defmodule Pleroma.Web.Federator do
   2   use GenServer
   3   alias Pleroma.User
   4   alias Pleroma.Activity
   5   alias Pleroma.Web.{WebFinger, Websub}
   6   alias Pleroma.Web.ActivityPub.ActivityPub
   7   alias Pleroma.Web.ActivityPub.Relay
   8   alias Pleroma.Web.ActivityPub.Transmogrifier
   9   alias Pleroma.Web.ActivityPub.Utils
  10   require Logger
  11
  12   @websub Application.get_env(:pleroma, :websub)
  13   @ostatus Application.get_env(:pleroma, :ostatus)
  14   @httpoison Application.get_env(:pleroma, :httpoison)
  15   @instance Application.get_env(:pleroma, :instance)
  16   @federating Keyword.get(@instance, :federating)
  17   @max_jobs 20
  18
  19   def init(args) do
  20     {:ok, args}
  21   end
  22
  23   def start_link do
  24     spawn(fn ->
  25       # 1 minute
  26       Process.sleep(1000 * 60 * 1)
  27       enqueue(:refresh_subscriptions, nil)
  28     end)
  29
  30     GenServer.start_link(
  31       __MODULE__,
  32       %{
  33         in: {:sets.new(), []},
  34         out: {:sets.new(), []}
  35       },
  36       name: __MODULE__
  37     )
  38   end
  39
  40   def handle(:refresh_subscriptions, _) do
  41     Logger.debug("Federator running refresh subscriptions")
  42     Websub.refresh_subscriptions()
  43
  44     spawn(fn ->
  45       # 6 hours
  46       Process.sleep(1000 * 60 * 60 * 6)
  47       enqueue(:refresh_subscriptions, nil)
  48     end)
  49   end
  50
  51   def handle(:request_subscription, websub) do
  52     Logger.debug("Refreshing #{websub.topic}")
  53
  54     with {:ok, websub} <- Websub.request_subscription(websub) do
  55       Logger.debug("Successfully refreshed #{websub.topic}")
  56     else
  57       _e -> Logger.debug("Couldn't refresh #{websub.topic}")
  58     end
  59   end
  60
  61   def handle(:publish, activity) do
  62     Logger.debug(fn -> "Running publish for #{activity.data["id"]}" end)
  63
  64     with actor when not is_nil(actor) <- User.get_cached_by_ap_id(activity.data["actor"]) do
  65       {:ok, actor} = WebFinger.ensure_keys_present(actor)
  66
  67       if ActivityPub.is_public?(activity) do
  68         Logger.info(fn -> "Sending #{activity.data["id"]} out via WebSub" end)
  69         Websub.publish(Pleroma.Web.OStatus.feed_path(actor), actor, activity)
  70
  71         Logger.info(fn -> "Sending #{activity.data["id"]} out via Salmon" end)
  72         Pleroma.Web.Salmon.publish(actor, activity)
  73
  74         Logger.info(fn -> "Relaying #{activity.data["id"]} out" end)
  75         Pleroma.Web.ActivityPub.Relay.publish(activity)
  76       end
  77
  78       Logger.info(fn -> "Sending #{activity.data["id"]} out via AP" end)
  79       Pleroma.Web.ActivityPub.ActivityPub.publish(actor, activity)
  80     end
  81   end
  82
  83   def handle(:verify_websub, websub) do
  84     Logger.debug(fn ->
  85       "Running WebSub verification for #{websub.id} (#{websub.topic}, #{websub.callback})"
  86     end)
  87
  88     @websub.verify(websub)
  89   end
  90
  91   def handle(:incoming_doc, doc) do
  92     Logger.info("Got document, trying to parse")
  93     @ostatus.handle_incoming(doc)
  94   end
  95
  96   def handle(:incoming_ap_doc, params) do
  97     Logger.info("Handling incoming AP activity")
  98
  99     params = Utils.normalize_params(params)
 100
 101     with {:ok, _user} <- ap_enabled_actor(params["actor"]),
 102          nil <- Activity.normalize(params["id"]),
 103          {:ok, _activity} <- Transmogrifier.handle_incoming(params) do
 104     else
 105       %Activity{} ->
 106         Logger.info("Already had #{params["id"]}")
 107
 108       _e ->
 109         # Just drop those for now
 110         Logger.info("Unhandled activity")
 111         Logger.info(Poison.encode!(params, pretty: 2))
 112     end
 113   end
 114
 115   def handle(:publish_single_ap, params) do
 116     ActivityPub.publish_one(params)
 117   end
 118
 119   def handle(:publish_single_websub, %{xml: xml, topic: topic, callback: callback, secret: secret}) do
 120     signature = @websub.sign(secret || "", xml)
 121     Logger.debug(fn -> "Pushing #{topic} to #{callback}" end)
 122
 123     with {:ok, %{status_code: code}} <-
 124            @httpoison.post(
 125              callback,
 126              xml,
 127              [
 128                {"Content-Type", "application/atom+xml"},
 129                {"X-Hub-Signature", "sha1=#{signature}"}
 130              ],
 131              timeout: 10000,
 132              recv_timeout: 20000,
 133              hackney: [pool: :default]
 134            ) do
 135       Logger.debug(fn -> "Pushed to #{callback}, code #{code}" end)
 136     else
 137       e ->
 138         Logger.debug(fn -> "Couldn't push to #{callback}, #{inspect(e)}" end)
 139     end
 140   end
 141
 142   def handle(type, _) do
 143     Logger.debug(fn -> "Unknown task: #{type}" end)
 144     {:error, "Don't know what to do with this"}
 145   end
 146
 147   def enqueue(type, payload, priority \\ 1) do
 148     if @federating do
 149       if Mix.env() == :test do
 150         handle(type, payload)
 151       else
 152         GenServer.cast(__MODULE__, {:enqueue, type, payload, priority})
 153       end
 154     end
 155   end
 156
 157   def maybe_start_job(running_jobs, queue) do
 158     if :sets.size(running_jobs) < @max_jobs && queue != [] do
 159       {{type, payload}, queue} = queue_pop(queue)
 160       {:ok, pid} = Task.start(fn -> handle(type, payload) end)
 161       mref = Process.monitor(pid)
 162       {:sets.add_element(mref, running_jobs), queue}
 163     else
 164       {running_jobs, queue}
 165     end
 166   end
 167
 168   def handle_cast({:enqueue, type, payload, _priority}, state)
 169       when type in [:incoming_doc, :incoming_ap_doc] do
 170     %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state
 171     i_queue = enqueue_sorted(i_queue, {type, payload}, 1)
 172     {i_running_jobs, i_queue} = maybe_start_job(i_running_jobs, i_queue)
 173     {:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}}
 174   end
 175
 176   def handle_cast({:enqueue, type, payload, _priority}, state) do
 177     %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state
 178     o_queue = enqueue_sorted(o_queue, {type, payload}, 1)
 179     {o_running_jobs, o_queue} = maybe_start_job(o_running_jobs, o_queue)
 180     {:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}}
 181   end
 182
 183   def handle_cast(m, state) do
 184     IO.inspect("Unknown: #{inspect(m)}, #{inspect(state)}")
 185     {:noreply, state}
 186   end
 187
 188   def handle_info({:DOWN, ref, :process, _pid, _reason}, state) do
 189     %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}} = state
 190     i_running_jobs = :sets.del_element(ref, i_running_jobs)
 191     o_running_jobs = :sets.del_element(ref, o_running_jobs)
 192     {i_running_jobs, i_queue} = maybe_start_job(i_running_jobs, i_queue)
 193     {o_running_jobs, o_queue} = maybe_start_job(o_running_jobs, o_queue)
 194
 195     {:noreply, %{in: {i_running_jobs, i_queue}, out: {o_running_jobs, o_queue}}}
 196   end
 197
 198   def enqueue_sorted(queue, element, priority) do
 199     [%{item: element, priority: priority} | queue]
 200     |> Enum.sort_by(fn %{priority: priority} -> priority end)
 201   end
 202
 203   def queue_pop([%{item: element} | queue]) do
 204     {element, queue}
 205   end
 206
 207   def ap_enabled_actor(id) do
 208     user = User.get_by_ap_id(id)
 209
 210     if User.ap_enabled?(user) do
 211       {:ok, user}
 212     else
 213       ActivityPub.make_user_from_ap_id(id)
 214     end
 215   end
 216 end