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[anni] / lib / pleroma / web / plugs / instance_static.ex
1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
4
5 defmodule Pleroma.Web.Plugs.InstanceStatic do
6   require Pleroma.Constants
7
8   @moduledoc """
9   This is a shim to call `Plug.Static` but with runtime `from` configuration.
10
11   Mountpoints are defined directly in the module to avoid calling the configuration for every request including non-static ones.
12   """
13   @behaviour Plug
14
15   def file_path(path) do
16     instance_path =
17       Path.join(Pleroma.Config.get([:instance, :static_dir], "instance/static/"), path)
18
19     frontend_path = Pleroma.Web.Plugs.FrontendStatic.file_path(path, :primary)
20
21     (File.exists?(instance_path) && instance_path) ||
22       (frontend_path && File.exists?(frontend_path) && frontend_path) ||
23       Path.join(Application.app_dir(:pleroma, "priv/static/"), path)
24   end
25
26   def init(opts) do
27     opts
28     |> Keyword.put(:from, "__unconfigured_instance_static_plug")
29     |> Plug.Static.init()
30   end
31
32   for only <- Pleroma.Constants.static_only_files() do
33     def call(%{request_path: "/" <> unquote(only) <> _} = conn, opts) do
34       call_static(
35         conn,
36         opts,
37         Pleroma.Config.get([:instance, :static_dir], "instance/static")
38       )
39     end
40   end
41
42   def call(conn, _) do
43     conn
44   end
45
46   defp call_static(conn, opts, from) do
47     opts =
48       opts
49       |> Map.put(:from, from)
50
51     Plug.Static.call(conn, opts)
52   end
53 end