class ActiveStorage::Service::S3Service

def download_chunk(key, range)
  instrument :download_chunk, key: key, range: range do
    object_for(key).get(range: "bytes=#{range.begin}-#{range.exclude_end? ? range.end - 1 : range.end}").body.string.force_encoding(Encoding::BINARY)
  rescue Aws::S3::Errors::NoSuchKey
    raise ActiveStorage::FileNotFoundError
  end
end