132 lines
4.4 KiB
Elixir
132 lines
4.4 KiB
Elixir
# 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()]]) 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
|
|
|
|
defp handle_preview("image/" <> _ = _content_type, conn, url) do
|
|
handle_image_or_video_preview(conn, url)
|
|
end
|
|
|
|
defp handle_preview("video/" <> _ = _content_type, conn, url) do
|
|
handle_image_or_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_or_video_preview(%{params: params} = conn, url) do
|
|
with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(params),
|
|
media_proxy_url <- MediaProxy.url(url),
|
|
{:ok, thumbnail_binary} <-
|
|
MediaHelper.ffmpeg_resize(
|
|
media_proxy_url,
|
|
%{max_width: thumbnail_max_width, max_height: thumbnail_max_height}
|
|
) 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
|