1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Web.MediaProxy.MediaProxyController do
6 use Pleroma.Web, :controller
9 alias Pleroma.Helpers.MediaHelper
10 alias Pleroma.ReverseProxy
11 alias Pleroma.Web.MediaProxy
13 def remote(conn, %{"sig" => sig64, "url" => url64}) do
14 with {_, true} <- {:enabled, MediaProxy.enabled?()},
15 {:ok, url} <- MediaProxy.decode_url(sig64, url64),
16 :ok <- MediaProxy.verify_request_path_and_url(conn, url) do
17 proxy_opts = Config.get([:media_proxy, :proxy_opts], [])
18 ReverseProxy.call(conn, url, proxy_opts)
21 send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
23 {:error, :invalid_signature} ->
24 send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
26 {:wrong_filename, filename} ->
27 redirect(conn, external: MediaProxy.build_url(sig64, url64, filename))
31 def preview(conn, %{"sig" => sig64, "url" => url64}) do
32 with {_, true} <- {:enabled, MediaProxy.preview_enabled?()},
33 {:ok, url} <- MediaProxy.decode_url(sig64, url64),
34 :ok <- MediaProxy.verify_request_path_and_url(conn, url) do
35 handle_preview(conn, url)
38 send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
40 {:error, :invalid_signature} ->
41 send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
43 {:wrong_filename, filename} ->
44 redirect(conn, external: MediaProxy.build_preview_url(sig64, url64, filename))
48 defp handle_preview(conn, url) do
49 with {:ok, %{status: status} = head_response} when status in 200..299 <-
50 Tesla.head(url, opts: [adapter: [timeout: preview_head_request_timeout()]]) do
51 content_type = Tesla.get_header(head_response, "content-type")
52 handle_preview(content_type, conn, url)
54 {_, %{status: status}} ->
55 send_resp(conn, :failed_dependency, "Can't fetch HTTP headers (HTTP #{status}).")
57 {:error, :recv_response_timeout} ->
58 send_resp(conn, :failed_dependency, "HEAD request timeout.")
61 send_resp(conn, :failed_dependency, "Can't fetch HTTP headers.")
65 defp thumbnail_max_dimensions(params) do
66 config = Config.get([:media_preview_proxy], [])
69 if w = params["thumbnail_max_width"] do
72 Keyword.fetch!(config, :thumbnail_max_width)
75 thumbnail_max_height =
76 if h = params["thumbnail_max_height"] do
79 Keyword.fetch!(config, :thumbnail_max_height)
82 {thumbnail_max_width, thumbnail_max_height}
85 defp handle_preview("image/" <> _ = content_type, %{params: params} = conn, url) do
86 with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(params),
87 media_proxy_url <- MediaProxy.url(url),
88 {:ok, thumbnail_binary} <-
89 MediaHelper.ffmpeg_resize_remote(
95 |> put_resp_header("content-type", content_type)
96 |> send_resp(200, thumbnail_binary)
99 send_resp(conn, :failed_dependency, "Can't handle image preview.")
103 defp handle_preview(content_type, conn, _url) do
104 send_resp(conn, :unprocessable_entity, "Unsupported content type: #{content_type}.")
107 defp preview_head_request_timeout do
108 Config.get([:media_preview_proxy, :proxy_opts, :head_request_max_read_duration]) ||
112 defp preview_timeout do
113 Config.get([:media_preview_proxy, :proxy_opts, :max_read_duration]) ||
114 Config.get([:media_proxy, :proxy_opts, :max_read_duration]) ||
115 ReverseProxy.max_read_duration_default()