class ActiveStorage::Service::AzureBlobService

def download_chunk(key, range)
  instrument :download_chunk, key: key, range: range do
    handle_errors do
      io = client.get_blob(key, start: range.begin, end: range.exclude_end? ? range.end - 1 : range.end)
      io.force_encoding(Encoding::BINARY)
    end
  end
end