# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.MediaProxy.MediaProxyController do
alias Pleroma.Config
alias Pleroma.Helpers.MediaHelper
+ alias Pleroma.Helpers.UriHelper
alias Pleroma.ReverseProxy
alias Pleroma.Web.MediaProxy
+ alias Plug.Conn
def remote(conn, %{"sig" => sig64, "url" => url64}) do
with {_, true} <- {:enabled, MediaProxy.enabled?()},
ReverseProxy.call(conn, url, media_proxy_opts())
else
{:enabled, false} ->
- send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
+ send_resp(conn, 404, Conn.Status.reason_phrase(404))
{:in_banned_urls, true} ->
- send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
+ send_resp(conn, 404, Conn.Status.reason_phrase(404))
{:error, :invalid_signature} ->
- send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
+ send_resp(conn, 403, 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
+ def preview(%Conn{} = 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))
+ send_resp(conn, 404, Conn.Status.reason_phrase(404))
{:error, :invalid_signature} ->
- send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
+ send_resp(conn, 403, Conn.Status.reason_phrase(403))
{:wrong_filename, filename} ->
redirect(conn, external: MediaProxy.build_preview_url(sig64, url64, filename))
end
defp handle_preview(conn, url) do
+ media_proxy_url = MediaProxy.url(url)
+
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
+ Pleroma.HTTP.request("head", media_proxy_url, [], [], name: MyFinch) do
content_type = Tesla.get_header(head_response, "content-type")
- handle_preview(content_type, conn, url)
+ content_length = Tesla.get_header(head_response, "content-length")
+ content_length = content_length && String.to_integer(content_length)
+ static = conn.params["static"] in ["true", true]
+
+ cond do
+ static and content_type == "image/gif" ->
+ handle_jpeg_preview(conn, media_proxy_url)
+
+ static ->
+ drop_static_param_and_redirect(conn)
+
+ content_type == "image/gif" ->
+ redirect(conn, external: media_proxy_url)
+
+ min_content_length_for_preview() > 0 and content_length > 0 and
+ content_length < min_content_length_for_preview() ->
+ redirect(conn, external: media_proxy_url)
+
+ true ->
+ handle_preview(content_type, conn, media_proxy_url)
+ end
else
+ # If HEAD failed, redirecting to media proxy URI doesn't make much sense; returning an error
{_, %{status: status}} ->
send_resp(conn, :failed_dependency, "Can't fetch HTTP headers (HTTP #{status}).")
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()
+ defp handle_preview("image/png" <> _ = _content_type, conn, media_proxy_url) do
+ handle_png_preview(conn, media_proxy_url)
+ end
- redirect(conn, external: mediaproxy_url)
+ defp handle_preview("image/" <> _ = _content_type, conn, media_proxy_url) do
+ handle_jpeg_preview(conn, media_proxy_url)
end
- defp handle_preview("image/" <> _ = _content_type, conn, url) do
- handle_image_preview(conn, url)
+ defp handle_preview("video/" <> _ = _content_type, conn, media_proxy_url) do
+ handle_video_preview(conn, media_proxy_url)
end
- defp handle_preview("video/" <> _ = _content_type, conn, url) do
- handle_video_preview(conn, url)
+ defp handle_preview(_unsupported_content_type, conn, media_proxy_url) do
+ fallback_on_preview_error(conn, media_proxy_url)
end
- defp handle_preview(content_type, conn, _url) do
- send_resp(conn, :unprocessable_entity, "Unsupported content type: #{content_type}.")
+ defp handle_png_preview(conn, media_proxy_url) do
+ quality = Config.get!([:media_preview_proxy, :image_quality])
+ {thumbnail_max_width, thumbnail_max_height} = thumbnail_max_dimensions()
+
+ with {:ok, thumbnail_binary} <-
+ MediaHelper.image_resize(
+ media_proxy_url,
+ %{
+ max_width: thumbnail_max_width,
+ max_height: thumbnail_max_height,
+ quality: quality,
+ format: "png"
+ }
+ ) do
+ conn
+ |> put_preview_response_headers(["image/png", "preview.png"])
+ |> send_resp(200, thumbnail_binary)
+ else
+ _ ->
+ fallback_on_preview_error(conn, media_proxy_url)
+ end
end
- defp handle_image_preview(%{params: params} = conn, url) do
+ defp handle_jpeg_preview(conn, media_proxy_url) do
quality = Config.get!([:media_preview_proxy, :image_quality])
+ {thumbnail_max_width, thumbnail_max_height} = thumbnail_max_dimensions()
- with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(params),
- {:ok, thumbnail_binary} <-
+ with {:ok, thumbnail_binary} <-
MediaHelper.image_resize(
- url,
+ media_proxy_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\"")
+ |> put_preview_response_headers()
|> send_resp(200, thumbnail_binary)
else
_ ->
- send_resp(conn, :failed_dependency, "Can't handle preview.")
+ fallback_on_preview_error(conn, media_proxy_url)
end
end
- defp handle_video_preview(conn, url) do
+ defp handle_video_preview(conn, media_proxy_url) do
with {:ok, thumbnail_binary} <-
- MediaHelper.video_framegrab(url) do
+ MediaHelper.video_framegrab(media_proxy_url) do
conn
- |> put_resp_header("content-type", "image/jpeg")
- |> put_resp_header("content-disposition", "inline; filename=\"preview.jpg\"")
+ |> put_preview_response_headers()
|> send_resp(200, thumbnail_binary)
else
_ ->
- send_resp(conn, :failed_dependency, "Can't handle preview.")
+ fallback_on_preview_error(conn, media_proxy_url)
end
end
- defp thumbnail_max_dimensions(params) do
- config = Config.get([:media_preview_proxy], [])
+ defp drop_static_param_and_redirect(conn) do
+ uri_without_static_param =
+ conn
+ |> current_url()
+ |> UriHelper.modify_uri_params(%{}, ["static"])
- thumbnail_max_width =
- if w = params["thumbnail_max_width"] do
- String.to_integer(w)
- else
- Keyword.fetch!(config, :thumbnail_max_width)
- end
+ redirect(conn, external: uri_without_static_param)
+ end
- thumbnail_max_height =
- if h = params["thumbnail_max_height"] do
- String.to_integer(h)
- else
- Keyword.fetch!(config, :thumbnail_max_height)
- end
+ defp fallback_on_preview_error(conn, media_proxy_url) do
+ redirect(conn, external: media_proxy_url)
+ end
+
+ defp put_preview_response_headers(
+ conn,
+ [content_type, filename] = _content_info \\ ["image/jpeg", "preview.jpg"]
+ ) do
+ conn
+ |> put_resp_header("content-type", content_type)
+ |> put_resp_header("content-disposition", "inline; filename=\"#{filename}\"")
+ |> put_resp_header("cache-control", ReverseProxy.default_cache_control_header())
+ end
+
+ defp thumbnail_max_dimensions do
+ config = media_preview_proxy_config()
+
+ thumbnail_max_width = Keyword.fetch!(config, :thumbnail_max_width)
+ thumbnail_max_height = Keyword.fetch!(config, :thumbnail_max_height)
{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()
+ defp min_content_length_for_preview do
+ Keyword.get(media_preview_proxy_config(), :min_content_length, 0)
end
- defp media_proxy_opts do
- Config.get([:media_proxy, :proxy_opts], [])
+ defp media_preview_proxy_config do
+ Config.get!([:media_preview_proxy])
end
- defp media_preview_proxy_opts do
- Config.get([:media_preview_proxy, :proxy_opts], [])
+ defp media_proxy_opts do
+ Config.get([:media_proxy, :proxy_opts], [])
end
end
projects / akkoma / blobdiff