Error while copying object from S3 Golang "NoSuchKey: The specified key does not exist"-CodePudding

I want to copy a file from one folder to another on the same S3 bucket. while doing this I am getting an error NoSuchKey: The specified key does not exist my code is given below.

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
    }

Error message

{
"err": "NoSuchKey: The specified key does not exist."
"status code": 404
}

CodePudding user response：

Possible reason is that url.PathEscape replaces slashes in path with /

CodePudding user response：

Use url.QueryEscape instead of url.PathEscape as url.QueryEscape can encode special characters such as which cannot be encoded by url.PathEscape (this technique worked for me).

...
_, err := svc.CopyObject(
            &s3.CopyObjectInput{
                Bucket:     aws.String("document.as.a.service.test"),
                CopySource: aws.String(url.QueryEscape(source)),
                Key: aws.String(newPath),
            },
        )
...

And sometimes if copySource is not properly encoded error can be displayed as NoSuchKey: The specified key does not exist

Just in case to avoid confusion Go-AWS-SDK copyObject functions copySource will be the path of an existing file, and Key is the newPath or destination that you want your file to be copied.