func PutBlock(apiClient drive.APIClient, reader io.Reader) (*drive.BlockRefs, error) {
putBlockClient, err := apiClient.PutBlock(context.Background())
if err != nil {
return nil, err
}
if _, err := io.Copy(protostream.NewStreamingBytesWriter(putBlockClient), reader); err != nil {
return nil, err
}
return putBlockClient.CloseAndRecv()
}
