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