func headObject(c *s3.S3) { putObject(c) key := "aws/config.go" out, err := c.HeadObject( &s3.HeadObjectInput{ Bucket: &bucket, Key: &key, }, ) if err != nil { panic(err) } fmt.Println(out.Metadata) fmt.Println(*out.ContentLength) fmt.Println(*out.ContentType) }