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| author | Roger Braun <roger@rogerbraun.net> | 2018-02-11 09:50:55 +0100 |
|---|---|---|
| committer | Roger Braun <roger@rogerbraun.net> | 2018-02-11 09:50:55 +0100 |
| commit | 52200998c997576c9008cbe50b0a7b9f0e6134cc (patch) | |
| tree | c0d68f476442b8dd86fca1e182d5c09553800810 /lib/pleroma/web/media_proxy/controller.ex | |
| parent | 4a13b8488787773d09f67d1a436d5906e2f5b171 (diff) | |
| parent | 0e2ca77eec511857508208d3faeb9217c4496f8a (diff) | |
| download | pleroma-52200998c997576c9008cbe50b0a7b9f0e6134cc.tar.gz | |
Merge branch 'develop' into feature/activitypub
Diffstat (limited to 'lib/pleroma/web/media_proxy/controller.ex')
| -rw-r--r-- | lib/pleroma/web/media_proxy/controller.ex | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/lib/pleroma/web/media_proxy/controller.ex b/lib/pleroma/web/media_proxy/controller.ex new file mode 100644 index 000000000..9327e7253 --- /dev/null +++ b/lib/pleroma/web/media_proxy/controller.ex @@ -0,0 +1,84 @@ +defmodule Pleroma.Web.MediaProxy.MediaProxyController do + use Pleroma.Web, :controller + require Logger + + @httpoison Application.get_env(:pleroma, :httpoison) + + @max_body_length 25 * 1048576 + + @cache_control %{ + default: "public, max-age=1209600", + error: "public, must-revalidate, max-age=160", + } + + def remote(conn, %{"sig" => sig, "url" => url}) do + config = Application.get_env(:pleroma, :media_proxy, []) + with \ + true <- Keyword.get(config, :enabled, false), + {:ok, url} <- Pleroma.Web.MediaProxy.decode_url(sig, url), + {:ok, content_type, body} <- proxy_request(url) + do + conn + |> put_resp_content_type(content_type) + |> set_cache_header(:default) + |> send_resp(200, body) + else + false -> send_error(conn, 404) + {:error, :invalid_signature} -> send_error(conn, 403) + {:error, {:http, _, url}} -> redirect_or_error(conn, url, Keyword.get(config, :redirect_on_failure, true)) + end + end + + defp proxy_request(link) do + headers = [{"user-agent", "Pleroma/MediaProxy; #{Pleroma.Web.base_url()} <#{Application.get_env(:pleroma, :instance)[:email]}>"}] + options = @httpoison.process_request_options([:insecure, {:follow_redirect, true}]) + with \ + {:ok, 200, headers, client} <- :hackney.request(:get, link, headers, "", options), + headers = Enum.into(headers, Map.new), + {:ok, body} <- proxy_request_body(client), + content_type <- proxy_request_content_type(headers, body) + do + {:ok, content_type, body} + else + {:ok, status, _, _} -> + Logger.warn "MediaProxy: request failed, status #{status}, link: #{link}" + {:error, {:http, :bad_status, link}} + {:error, error} -> + Logger.warn "MediaProxy: request failed, error #{inspect error}, link: #{link}" + {:error, {:http, error, link}} + end + end + + defp set_cache_header(conn, key) do + Plug.Conn.put_resp_header(conn, "cache-control", @cache_control[key]) + end + + defp redirect_or_error(conn, url, true), do: redirect(conn, external: url) + defp redirect_or_error(conn, url, _), do: send_error(conn, 502, "Media proxy error: " <> url) + + defp send_error(conn, code, body \\ "") do + conn + |> set_cache_header(:error) + |> send_resp(code, body) + end + + defp proxy_request_body(client), do: proxy_request_body(client, <<>>) + defp proxy_request_body(client, body) when byte_size(body) < @max_body_length do + case :hackney.stream_body(client) do + {:ok, data} -> proxy_request_body(client, <<body :: binary, data :: binary>>) + :done -> {:ok, body} + {:error, reason} -> {:error, reason} + end + end + defp proxy_request_body(client, _) do + :hackney.close(client) + {:error, :body_too_large} + end + + # TODO: the body is passed here as well because some hosts do not provide a content-type. + # At some point we may want to use magic numbers to discover the content-type and reply a proper one. + defp proxy_request_content_type(headers, _body) do + headers["Content-Type"] || headers["content-type"] || "image/jpeg" + end + +end |