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diff --git a/lib/pleroma/web/media_proxy/media_proxy_controller.ex b/lib/pleroma/web/media_proxy/media_proxy_controller.ex
index 7ac1a97e2..411dc95d0 100644
--- a/lib/pleroma/web/media_proxy/media_proxy_controller.ex
+++ b/lib/pleroma/web/media_proxy/media_proxy_controller.ex
@@ -1,153 +1,156 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.MediaProxy.MediaProxyController do
use Pleroma.Web, :controller
alias Pleroma.Config
alias Pleroma.Helpers.MediaHelper
alias Pleroma.ReverseProxy
alias Pleroma.Web.MediaProxy
def remote(conn, %{"sig" => sig64, "url" => url64}) do
with {_, true} <- {:enabled, MediaProxy.enabled?()},
{:ok, url} <- MediaProxy.decode_url(sig64, url64),
{_, false} <- {:in_banned_urls, MediaProxy.in_banned_urls(url)},
:ok <- MediaProxy.verify_request_path_and_url(conn, url) do
ReverseProxy.call(conn, url, media_proxy_opts())
else
{:enabled, false} ->
send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
{:in_banned_urls, true} ->
send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
{:error, :invalid_signature} ->
send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
{:wrong_filename, filename} ->
redirect(conn, external: MediaProxy.build_url(sig64, url64, filename))
end
end
def preview(conn, %{"sig" => sig64, "url" => url64}) do
with {_, true} <- {:enabled, MediaProxy.preview_enabled?()},
{:ok, url} <- MediaProxy.decode_url(sig64, url64),
:ok <- MediaProxy.verify_request_path_and_url(conn, url) do
handle_preview(conn, url)
else
{:enabled, false} ->
send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
{:error, :invalid_signature} ->
send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
{:wrong_filename, filename} ->
redirect(conn, external: MediaProxy.build_preview_url(sig64, url64, filename))
end
end
defp handle_preview(conn, url) do
with {:ok, %{status: status} = head_response} when status in 200..299 <-
Tesla.head(url,
opts: [adapter: [timeout: preview_head_request_timeout(), follow_redirect: true]]
) do
content_type = Tesla.get_header(head_response, "content-type")
handle_preview(content_type, conn, url)
else
{_, %{status: status}} ->
send_resp(conn, :failed_dependency, "Can't fetch HTTP headers (HTTP #{status}).")
{:error, :recv_response_timeout} ->
send_resp(conn, :failed_dependency, "HEAD request timeout.")
_ ->
send_resp(conn, :failed_dependency, "Can't fetch HTTP headers.")
end
end
+ # TODO: find a workaround so avatar_static and banner_static can work.
+ # Those only permit GIFs for animation, so we have to permit a way to
+ # allow those to get real static variants.
defp handle_preview("image/gif" = _content_type, conn, url) do
mediaproxy_url = url |> MediaProxy.url()
redirect(conn, external: mediaproxy_url)
end
defp handle_preview("image/" <> _ = _content_type, conn, url) do
handle_image_preview(conn, url)
end
defp handle_preview("video/" <> _ = _content_type, conn, url) do
handle_video_preview(conn, url)
end
defp handle_preview(content_type, conn, _url) do
send_resp(conn, :unprocessable_entity, "Unsupported content type: #{content_type}.")
end
defp handle_image_preview(%{params: params} = conn, url) do
quality = Config.get!([:media_preview_proxy, :image_quality])
with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(params),
{:ok, thumbnail_binary} <-
MediaHelper.image_resize(
url,
%{max_width: thumbnail_max_width, max_height: thumbnail_max_height, quality: quality}
) do
conn
|> put_resp_header("content-type", "image/jpeg")
|> put_resp_header("content-disposition", "inline; filename=\"preview.jpg\"")
|> send_resp(200, thumbnail_binary)
else
_ ->
send_resp(conn, :failed_dependency, "Can't handle preview.")
end
end
defp handle_video_preview(conn, url) do
with {:ok, thumbnail_binary} <-
MediaHelper.video_framegrab(url) do
conn
|> put_resp_header("content-type", "image/jpeg")
|> put_resp_header("content-disposition", "inline; filename=\"preview.jpg\"")
|> send_resp(200, thumbnail_binary)
else
_ ->
send_resp(conn, :failed_dependency, "Can't handle preview.")
end
end
defp thumbnail_max_dimensions(params) do
config = Config.get([:media_preview_proxy], [])
thumbnail_max_width =
if w = params["thumbnail_max_width"] do
String.to_integer(w)
else
Keyword.fetch!(config, :thumbnail_max_width)
end
thumbnail_max_height =
if h = params["thumbnail_max_height"] do
String.to_integer(h)
else
Keyword.fetch!(config, :thumbnail_max_height)
end
{thumbnail_max_width, thumbnail_max_height}
end
defp preview_head_request_timeout do
Keyword.get(media_preview_proxy_opts(), :head_request_max_read_duration) ||
Keyword.get(media_proxy_opts(), :max_read_duration) ||
ReverseProxy.max_read_duration_default()
end
defp media_proxy_opts do
Config.get([:media_proxy, :proxy_opts], [])
end
defp media_preview_proxy_opts do
Config.get([:media_preview_proxy, :proxy_opts], [])
end
end

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