Imports github.com/aws/aws-sdk-go/aws/awserr github.com/aws/aws-sdk-go/aws/awsutil github.com/aws/aws-sdk-go/aws/client github.com/aws/aws-sdk-go/aws/request github.com/aws/aws-sdk-go/service/s3 github.com/aws/aws-sdk-go/service/s3/s3iface Standard library imports bytes fmt io net/http sort strconv strings sync time