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Diffstat (limited to 'lib/pleroma/web/plugs/uploaded_media.ex')
-rw-r--r-- | lib/pleroma/web/plugs/uploaded_media.ex | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/lib/pleroma/web/plugs/uploaded_media.ex b/lib/pleroma/web/plugs/uploaded_media.ex new file mode 100644 index 000000000..2378e98d2 --- /dev/null +++ b/lib/pleroma/web/plugs/uploaded_media.ex @@ -0,0 +1,114 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Web.Plugs.UploadedMedia do + @moduledoc """ + """ + + import Plug.Conn + import Pleroma.Web.Gettext + require Logger + + alias Pleroma.Web.MediaProxy + + @behaviour Plug + # no slashes + @path "media" + + @default_cache_control_header "public, max-age=1209600" + + def init(_opts) do + static_plug_opts = + [ + headers: %{"cache-control" => @default_cache_control_header}, + cache_control_for_etags: @default_cache_control_header + ] + |> Keyword.put(:from, "__unconfigured_media_plug") + |> Keyword.put(:at, "/__unconfigured_media_plug") + |> Plug.Static.init() + + %{static_plug_opts: static_plug_opts} + end + + def call(%{request_path: <<"/", @path, "/", file::binary>>} = conn, opts) do + conn = + case fetch_query_params(conn) do + %{query_params: %{"name" => name}} = conn -> + name = String.replace(name, "\"", "\\\"") + + put_resp_header(conn, "content-disposition", "filename=\"#{name}\"") + + conn -> + conn + end + |> merge_resp_headers([{"content-security-policy", "sandbox"}]) + + config = Pleroma.Config.get(Pleroma.Upload) + + with uploader <- Keyword.fetch!(config, :uploader), + proxy_remote = Keyword.get(config, :proxy_remote, false), + {:ok, get_method} <- uploader.get_file(file), + false <- media_is_banned(conn, get_method) do + get_media(conn, get_method, proxy_remote, opts) + else + _ -> + conn + |> send_resp(:internal_server_error, dgettext("errors", "Failed")) + |> halt() + end + end + + def call(conn, _opts), do: conn + + defp media_is_banned(%{request_path: path} = _conn, {:static_dir, _}) do + MediaProxy.in_banned_urls(Pleroma.Upload.base_url() <> path) + end + + defp media_is_banned(_, {:url, url}), do: MediaProxy.in_banned_urls(url) + + defp media_is_banned(_, _), do: false + + defp get_media(conn, {:static_dir, directory}, _, opts) do + static_opts = + Map.get(opts, :static_plug_opts) + |> Map.put(:at, [@path]) + |> Map.put(:from, directory) + + conn = Plug.Static.call(conn, static_opts) + + if conn.halted do + conn + else + conn + |> send_resp(:not_found, dgettext("errors", "Not found")) + |> halt() + end + end + + defp get_media(conn, {:url, url}, true, _) do + proxy_opts = [ + http: [ + follow_redirect: true, + pool: :upload + ] + ] + + conn + |> Pleroma.ReverseProxy.call(url, proxy_opts) + end + + defp get_media(conn, {:url, url}, _, _) do + conn + |> Phoenix.Controller.redirect(external: url) + |> halt() + end + + defp get_media(conn, unknown, _, _) do + Logger.error("#{__MODULE__}: Unknown get startegy: #{inspect(unknown)}") + + conn + |> send_resp(:internal_server_error, dgettext("errors", "Internal Error")) + |> halt() + end +end |