# 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.Upload.Filter.Exiftool do
+ @moduledoc """
+ Strips GPS related EXIF tags and overwrites the file in place.
+ Also strips or replaces filesystem metadata e.g., timestamps.
+ """
@behaviour Pleroma.Upload.Filter
- @type conversion :: action :: String.t() | {action :: String.t(), opts :: String.t()}
- @type conversions :: conversion() | [conversion()]
+ @spec filter(Pleroma.Upload.t()) :: {:ok, any()} | {:error, String.t()}
+
+ # webp is not compatible with exiftool at this time
+ def filter(%Pleroma.Upload{content_type: "image/webp"}), do: {:ok, :noop}
def filter(%Pleroma.Upload{tempfile: file, content_type: "image" <> _}) do
- System.cmd("exiftool", ["-overwrite_original", "-gps:all=", file], parallelism: true)
- :ok
+ try do
+ case System.cmd("exiftool", ["-overwrite_original", "-gps:all=", file], parallelism: true) do
+ {_response, 0} -> {:ok, :filtered}
+ {error, 1} -> {:error, error}
+ end
+ rescue
+ _e in ErlangError ->
+ {:error, "exiftool command not found"}
+ end
end
- def filter(_), do: :ok
+ def filter(_), do: {:ok, :noop}
end