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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.Federator do
   6   alias Pleroma.Activity
   7   alias Pleroma.Object.Containment
   8   alias Pleroma.User
   9   alias Pleroma.Web.ActivityPub.ActivityPub
  10   alias Pleroma.Web.ActivityPub.Transmogrifier
  11   alias Pleroma.Web.ActivityPub.Utils
  12   alias Pleroma.Web.Federator.Publisher
  13   alias Pleroma.Web.Federator.RetryQueue
  14   alias Pleroma.Web.WebFinger
  15   alias Pleroma.Web.Websub
  16
  17   require Logger
  18
  19   @websub Application.get_env(:pleroma, :websub)
  20   @ostatus Application.get_env(:pleroma, :ostatus)
  21
  22   def init do
  23     # 1 minute
  24     Process.sleep(1000 * 60)
  25     refresh_subscriptions()
  26   end
  27
  28   # Client API
  29
  30   def incoming_doc(doc) do
  31     PleromaJobQueue.enqueue(:federator_incoming, __MODULE__, [:incoming_doc, doc])
  32   end
  33
  34   def incoming_ap_doc(params) do
  35     PleromaJobQueue.enqueue(:federator_incoming, __MODULE__, [:incoming_ap_doc, params])
  36   end
  37
  38   def publish(activity, priority \\ 1) do
  39     PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:publish, activity], priority)
  40   end
  41
  42   def verify_websub(websub) do
  43     PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:verify_websub, websub])
  44   end
  45
  46   def request_subscription(sub) do
  47     PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:request_subscription, sub])
  48   end
  49
  50   def refresh_subscriptions do
  51     PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:refresh_subscriptions])
  52   end
  53
  54   # Job Worker Callbacks
  55
  56   def perform(:refresh_subscriptions) do
  57     Logger.debug("Federator running refresh subscriptions")
  58     Websub.refresh_subscriptions()
  59
  60     spawn(fn ->
  61       # 6 hours
  62       Process.sleep(1000 * 60 * 60 * 6)
  63       refresh_subscriptions()
  64     end)
  65   end
  66
  67   def perform(:request_subscription, websub) do
  68     Logger.debug("Refreshing #{websub.topic}")
  69
  70     with {:ok, websub} <- Websub.request_subscription(websub) do
  71       Logger.debug("Successfully refreshed #{websub.topic}")
  72     else
  73       _e -> Logger.debug("Couldn't refresh #{websub.topic}")
  74     end
  75   end
  76
  77   def perform(:publish, activity) do
  78     Logger.debug(fn -> "Running publish for #{activity.data["id"]}" end)
  79
  80     with actor when not is_nil(actor) <- User.get_cached_by_ap_id(activity.data["actor"]) do
  81       {:ok, actor} = WebFinger.ensure_keys_present(actor)
  82
  83       Publisher.publish(actor, activity)
  84     end
  85   end
  86
  87   def perform(:verify_websub, websub) do
  88     Logger.debug(fn ->
  89       "Running WebSub verification for #{websub.id} (#{websub.topic}, #{websub.callback})"
  90     end)
  91
  92     @websub.verify(websub)
  93   end
  94
  95   def perform(:incoming_doc, doc) do
  96     Logger.info("Got document, trying to parse")
  97     @ostatus.handle_incoming(doc)
  98   end
  99
 100   def perform(:incoming_ap_doc, params) do
 101     Logger.info("Handling incoming AP activity")
 102
 103     params = Utils.normalize_params(params)
 104
 105     # NOTE: we use the actor ID to do the containment, this is fine because an
 106     # actor shouldn't be acting on objects outside their own AP server.
 107     with {:ok, _user} <- ap_enabled_actor(params["actor"]),
 108          nil <- Activity.normalize(params["id"]),
 109          :ok <- Containment.contain_origin_from_id(params["actor"], params),
 110          {:ok, activity} <- Transmogrifier.handle_incoming(params) do
 111       {:ok, activity}
 112     else
 113       %Activity{} ->
 114         Logger.info("Already had #{params["id"]}")
 115         :error
 116
 117       _e ->
 118         # Just drop those for now
 119         Logger.info("Unhandled activity")
 120         Logger.info(Jason.encode!(params, pretty: true))
 121         :error
 122     end
 123   end
 124
 125   def perform(
 126         :publish_single_websub,
 127         %{xml: _xml, topic: _topic, callback: _callback, secret: _secret} = params
 128       ) do
 129     case Websub.publish_one(params) do
 130       {:ok, _} ->
 131         :ok
 132
 133       {:error, _} ->
 134         RetryQueue.enqueue(params, Websub)
 135     end
 136   end
 137
 138   def perform(type, _) do
 139     Logger.debug(fn -> "Unknown task: #{type}" end)
 140     {:error, "Don't know what to do with this"}
 141   end
 142
 143   def ap_enabled_actor(id) do
 144     user = User.get_cached_by_ap_id(id)
 145
 146     if User.ap_enabled?(user) do
 147       {:ok, user}
 148     else
 149       ActivityPub.make_user_from_ap_id(id)
 150     end
 151   end
 152 end