class ActiveStorage::Service::AzureStorageService

def download(key, &block)
  if block_given?
    instrument :streaming_download, key: key do
      stream(key, &block)
    end
  else
    instrument :download, key: key do
      handle_errors do
        _, io = client.get_blob(container, key)
        io.force_encoding(Encoding::BINARY)
      end
    end
  end
end