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

   1 defmodule Pleroma.Web.MediaProxy.MediaProxyController do
   2   use Pleroma.Web, :controller
   3   require Logger
   4
   5   def remote(conn, %{"sig" => sig, "url" => url}) do
   6     {:ok, url} = Pleroma.Web.MediaProxy.decode_url(sig, url)
   7     url = url |> URI.encode()
   8     case proxy_request(url) do
   9       {:ok, content_type, body} ->
  10         conn
  11         |> put_resp_content_type(content_type)
  12         |> set_cache_header(:default)
  13         |> send_resp(200, body)
  14       other ->
  15         conn
  16         |> set_cache_header(:error)
  17         |> redirect(external: url)
  18     end
  19   end
  20
  21   defp proxy_request(link) do
  22     headers = [{"user-agent", "Pleroma/MediaProxy; #{Pleroma.Web.base_url()} <#{Application.get_env(:pleroma, :instance)[:email]}>"}]
  23     options = [:insecure, {:follow_redirect, true}]
  24     case :hackney.request(:get, link, headers, "", options) do
  25       {:ok, 200, headers, client} ->
  26         headers = Enum.into(headers, Map.new)
  27         {:ok, body} = :hackney.body(client)
  28         {:ok, headers["Content-Type"], body}
  29       {:ok, status, _, _} ->
  30         Logger.warn "MediaProxy: request failed, status #{status}, link: #{link}"
  31         {:error, :bad_status}
  32       {:error, error} ->
  33         Logger.warn "MediaProxy: request failed, error #{inspect error}, link: #{link}"
  34         {:error, error}
  35     end
  36   end
  37
  38   @cache_control %{
  39     default: "public, max-age=1209600",
  40     error:   "public, must-revalidate, max-age=160",
  41   }
  42
  43   defp set_cache_header(conn, true), do: set_cache_header(conn, :default)
  44   defp set_cache_header(conn, false), do: set_cache_header(conn, :error)
  45   defp set_cache_header(conn, key) when is_atom(key), do: set_cache_header(conn, @cache_control[key])
  46   defp set_cache_header(conn, value) when is_binary(value), do: Plug.Conn.put_resp_header(conn, "cache-control", value)
  47
  48 end