英文:
Error while copying object from S3 Golang "NoSuchKey: The specified key does not exist"
问题
我想将一个文件从一个文件夹复制到同一个S3存储桶中的另一个文件夹。在执行此操作时，我遇到了一个错误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
}
英文:
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
}
答案1
得分: 0
可能的原因是url.PathEscape将路径中的斜杠替换为%2F。
英文:
Possible reason is that url.PathEscape replaces slashes in path with %2F
答案2
得分: 0
请使用url.QueryEscape代替url.PathEscape，因为url.QueryEscape可以编码特殊字符，如+，而url.PathEscape无法编码（这种技术对我有效）。
...
_, err := svc.CopyObject(
&s3.CopyObjectInput{
Bucket: aws.String("document.as.a.service.test"),
CopySource: aws.String(url.QueryEscape(source)),
Key: aws.String(newPath),
},
)
...
有时，如果copySource没有正确编码，可能会显示错误消息NoSuchKey: The specified key does not exist。
为了避免混淆，Go-AWS-SDK中的copyObject函数中，copySource应该是现有文件的路径，而Key是要将文件复制到的新路径或目标路径。
英文:
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.
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