1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy do
6 @moduledoc "Preloads any attachments in the MediaProxy cache by prefetching them"
7 @behaviour Pleroma.Web.ActivityPub.MRF.Policy
10 alias Pleroma.Web.MediaProxy
15 receive_timeout: 10_000
19 def history_awareness, do: :auto
22 # Fetching only proxiable resources
23 if MediaProxy.enabled?() and MediaProxy.url_proxiable?(url) do
24 # If preview proxy is enabled, it'll also hit media proxy (so we're caching both requests)
25 prefetch_url = MediaProxy.preview_url(url)
27 Logger.debug("Prefetching #{inspect(url)} as #{inspect(prefetch_url)}")
29 if Pleroma.Config.get(:env) == :test do
32 ConcurrentLimiter.limit(__MODULE__, fn ->
33 Task.start(fn -> fetch(prefetch_url) end)
39 defp fetch(url), do: HTTP.get(url, [], @adapter_options)
41 defp preload(%{"object" => %{"attachment" => attachments}} = _message) do
42 Enum.each(attachments, fn
43 %{"url" => url} when is_list(url) ->
50 Logger.debug("Unhandled attachment URL object #{inspect(x)}")
54 Logger.debug("Unhandled attachment #{inspect(x)}")
59 def filter(%{"type" => type, "object" => %{"attachment" => attachments} = _object} = message)
60 when type in ["Create", "Update"] and is_list(attachments) and length(attachments) > 0 do
67 def filter(message), do: {:ok, message}
70 def describe, do: {:ok, %{}}