Imports
- google.golang.org/api/iterator
- cloud.google.com/go/storage
- github.com/sirupsen/logrus
- github.com/pborman/uuid
- github.com/aliyun/aliyun-oss-go-sdk/oss
- github.com/Azure/azure-sdk-for-go/storage
- github.com/aws/aws-sdk-go/service/s3/s3manager
- github.com/aws/aws-sdk-go/service/s3