从 S3 Golang 复制对象时出错“NoSuchKey：指定的键不存在”

我想将文件从一个文件夹复制到同一个 S3 存储桶上的另一个文件夹。执行此操作时出现错误，NoSuchKey: The specified key does not exist我的代码如下所示。

sess, err := session.NewSession(&aws.Config{Region: aws.String("ap-south-1")})

if err != nil {

    return nil, err

}

Oldpath := "folder1/folder2/a+b.pdf"

newBaseFolder  := "folder3"

svc := s3.New(sess)

bucketName := "mybucket.test"

source := bucketName + "/" + oldPath                                 // Oldpath = "folder1/folder2/a+b.pdf"

                                                                     //newBaseFolder = "folder3"

newPath := newBaseFolder + "/" + strings.SplitN(oldPath, "/", 2)[1] //newPath = "folder3/folder2/a+b.pdf" 

_, err = svc.CopyObject(&s3.CopyObjectInput{

            Bucket:     aws.String(bucketName), // bucketName = "mybucket.test" 

            CopySource: aws.String(url.PathEscape(source)),

            Key:        aws.String(newPath)})

if err != nil {

        return nil, err

    }

错误信息

{

"err": "NoSuchKey: The specified key does not exist."

"status code": 404

}