defmodule Pleroma.Upload do alias Ecto.UUID def check_file_size(path, nil), do: true def check_file_size(path, size_limit) do {:ok, %{size: size}} = File.stat(path) size <= size_limit end def store(file, should_dedupe, size_limit \\ nil) def store(%Plug.Upload{} = file, should_dedupe, size_limit) do content_type = get_content_type(file.path) with uuid <- get_uuid(file, should_dedupe), name <- get_name(file, uuid, content_type, should_dedupe), true <- check_file_size(file.path, size_limit) do strip_exif_data(content_type, file.path) {:ok, url_path} = uploader().put_file(name, uuid, file.path, content_type, should_dedupe) %{ "type" => "Document", "url" => [ %{ "type" => "Link", "mediaType" => content_type, "href" => url_path } ], "name" => name } else _e -> nil end end def store(%{"img" => "data:image/" <> image_data}, should_dedupe, size_limit) do parsed = Regex.named_captures(~r/(?jpeg|png|gif);base64,(?.*)/, image_data) data = Base.decode64!(parsed["data"], ignore: :whitespace) with tmp_path <- tempfile_for_image(data), uuid <- UUID.generate(), true <- check_file_size(tmp_path, size_limit) do content_type = get_content_type(tmp_path) strip_exif_data(content_type, tmp_path) name = create_name( String.downcase(Base.encode16(:crypto.hash(:sha256, data))), parsed["filetype"], content_type ) {:ok, url_path} = uploader().put_file(name, uuid, tmp_path, content_type, should_dedupe) %{ "type" => "Image", "url" => [ %{ "type" => "Link", "mediaType" => content_type, "href" => url_path } ], "name" => name } else _e -> nil end end @doc """ Creates a tempfile using the Plug.Upload Genserver which cleans them up automatically. """ def tempfile_for_image(data) do {:ok, tmp_path} = Plug.Upload.random_file("profile_pics") {:ok, tmp_file} = File.open(tmp_path, [:write, :raw, :binary]) IO.binwrite(tmp_file, data) tmp_path end def strip_exif_data(content_type, file) do settings = Application.get_env(:pleroma, Pleroma.Upload) do_strip = Keyword.fetch!(settings, :strip_exif) [filetype, _ext] = String.split(content_type, "/") if filetype == "image" and do_strip == true do Mogrify.open(file) |> Mogrify.custom("strip") |> Mogrify.save(in_place: true) end end defp create_name(uuid, ext, type) do case type do "application/octet-stream" -> String.downcase(Enum.join([uuid, ext], ".")) "audio/mpeg" -> String.downcase(Enum.join([uuid, "mp3"], ".")) _ -> String.downcase(Enum.join([uuid, List.last(String.split(type, "/"))], ".")) end end defp get_uuid(file, should_dedupe) do if should_dedupe do Base.encode16(:crypto.hash(:sha256, File.read!(file.path))) else UUID.generate() end end defp get_name(file, uuid, type, should_dedupe) do if should_dedupe do create_name(uuid, List.last(String.split(file.filename, ".")), type) else parts = String.split(file.filename, ".") new_filename = if length(parts) > 1 do Enum.drop(parts, -1) |> Enum.join(".") else Enum.join(parts) end case type do "application/octet-stream" -> file.filename "audio/mpeg" -> new_filename <> ".mp3" "image/jpeg" -> new_filename <> ".jpg" _ -> Enum.join([new_filename, String.split(type, "/") |> List.last()], ".") end end end def get_content_type(file) do match = File.open(file, [:read], fn f -> case IO.binread(f, 8) do <<0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A>> -> "image/png" <<0x47, 0x49, 0x46, 0x38, _, 0x61, _, _>> -> "image/gif" <<0xFF, 0xD8, 0xFF, _, _, _, _, _>> -> "image/jpeg" <<0x1A, 0x45, 0xDF, 0xA3, _, _, _, _>> -> "video/webm" <<0x00, 0x00, 0x00, _, 0x66, 0x74, 0x79, 0x70>> -> "video/mp4" <<0x49, 0x44, 0x33, _, _, _, _, _>> -> "audio/mpeg" <<255, 251, _, 68, 0, 0, 0, 0>> -> "audio/mpeg" <<0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00>> -> "audio/ogg" <<0x52, 0x49, 0x46, 0x46, _, _, _, _>> -> "audio/wav" _ -> "application/octet-stream" end end) case match do {:ok, type} -> type _e -> "application/octet-stream" end end defp uploader() do Pleroma.Config.get!([Pleroma.Upload, :uploader]) end end