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 {_, false} <- {:in_banned_urls, MediaProxy.in_banned_urls(url)},
17 :ok <- MediaProxy.verify_request_path_and_url(conn, url) do
18 ReverseProxy.call(conn, url, media_proxy_opts())
21 send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
23 {:in_banned_urls, true} ->
24 send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
26 {:error, :invalid_signature} ->
27 send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
29 {:wrong_filename, filename} ->
30 redirect(conn, external: MediaProxy.build_url(sig64, url64, filename))
34 def preview(conn, %{"sig" => sig64, "url" => url64}) do
35 with {_, true} <- {:enabled, MediaProxy.preview_enabled?()},
36 {:ok, url} <- MediaProxy.decode_url(sig64, url64) do
37 handle_preview(conn, url)
40 send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
42 {:error, :invalid_signature} ->
43 send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
45 {:wrong_filename, filename} ->
46 redirect(conn, external: MediaProxy.build_preview_url(sig64, url64, filename))
50 defp handle_preview(conn, url) do
51 media_proxy_url = MediaProxy.url(url)
53 with {:ok, %{status: status} = head_response} when status in 200..299 <-
54 Pleroma.HTTP.request("head", media_proxy_url, [], [], adapter: [pool: :media]) do
55 content_type = Tesla.get_header(head_response, "content-type")
56 handle_preview(content_type, conn, media_proxy_url)
58 {_, %{status: status}} ->
59 send_resp(conn, :failed_dependency, "Can't fetch HTTP headers (HTTP #{status}).")
61 {:error, :recv_response_timeout} ->
62 send_resp(conn, :failed_dependency, "HEAD request timeout.")
65 send_resp(conn, :failed_dependency, "Can't fetch HTTP headers.")
70 "image/" <> _ = _content_type,
71 %{params: %{"output_format" => "jpeg"}} = conn,
74 handle_jpeg_preview(conn, media_proxy_url)
77 defp handle_preview("image/gif" = _content_type, conn, media_proxy_url) do
78 redirect(conn, external: media_proxy_url)
81 defp handle_preview("image/png" <> _ = _content_type, conn, media_proxy_url) do
82 handle_png_preview(conn, media_proxy_url)
85 defp handle_preview("image/" <> _ = _content_type, conn, media_proxy_url) do
86 handle_jpeg_preview(conn, media_proxy_url)
89 defp handle_preview("video/" <> _ = _content_type, conn, media_proxy_url) do
90 handle_video_preview(conn, media_proxy_url)
93 defp handle_preview(content_type, conn, _media_proxy_url) do
94 send_resp(conn, :unprocessable_entity, "Unsupported content type: #{content_type}.")
97 defp handle_png_preview(%{params: params} = conn, media_proxy_url) do
98 quality = Config.get!([:media_preview_proxy, :image_quality])
100 with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(params),
101 {:ok, thumbnail_binary} <-
102 MediaHelper.image_resize(
105 max_width: thumbnail_max_width,
106 max_height: thumbnail_max_height,
112 |> put_preview_response_headers(["image/png", "preview.png"])
113 |> send_resp(200, thumbnail_binary)
116 send_resp(conn, :failed_dependency, "Can't handle preview.")
120 defp handle_jpeg_preview(%{params: params} = conn, media_proxy_url) do
121 quality = Config.get!([:media_preview_proxy, :image_quality])
123 with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(params),
124 {:ok, thumbnail_binary} <-
125 MediaHelper.image_resize(
127 %{max_width: thumbnail_max_width, max_height: thumbnail_max_height, quality: quality}
130 |> put_preview_response_headers()
131 |> send_resp(200, thumbnail_binary)
134 send_resp(conn, :failed_dependency, "Can't handle preview.")
138 defp handle_video_preview(conn, media_proxy_url) do
139 with {:ok, thumbnail_binary} <-
140 MediaHelper.video_framegrab(media_proxy_url) do
142 |> put_preview_response_headers()
143 |> send_resp(200, thumbnail_binary)
146 send_resp(conn, :failed_dependency, "Can't handle preview.")
150 defp put_preview_response_headers(
152 [content_type, filename] = _content_info \\ ["image/jpeg", "preview.jpg"]
155 |> put_resp_header("content-type", content_type)
156 |> put_resp_header("content-disposition", "inline; filename=\"#{filename}\"")
157 |> put_resp_header("cache-control", ReverseProxy.default_cache_control_header())
160 defp thumbnail_max_dimensions(params) do
161 config = Config.get([:media_preview_proxy], [])
163 thumbnail_max_width =
164 if w = params["thumbnail_max_width"] do
167 Keyword.fetch!(config, :thumbnail_max_width)
170 thumbnail_max_height =
171 if h = params["thumbnail_max_height"] do
174 Keyword.fetch!(config, :thumbnail_max_height)
177 {thumbnail_max_width, thumbnail_max_height}
180 defp media_proxy_opts do
181 Config.get([:media_proxy, :proxy_opts], [])