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Enable pushing empty blobs

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This is an edge case when we are trying to upload an empty chunk of data using
a MultiPart upload. As a result we are trying to complete the MultipartUpload
with an empty slice of `completedUploadedParts` which will always lead to 400
being returned from S3 See: https://docs.aws.amazon.com/sdk-for-go/api/service/s3/#CompletedMultipartUpload
Solution: we upload an empty i.e. 0 byte part as a single part and then append it
to the completedUploadedParts slice used to complete the Multipart upload.

Signed-off-by: Milos Gajdos <milosthegajdos@gmail.com>
This commit is contained in:
Milos Gajdos 2022-10-29 19:42:28 +01:00
parent ad6249fa92
commit 5fa926a609
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1 changed files with 24 additions and 0 deletions
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24
registry/storage/driver/s3-aws/s3.go
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@ -1468,6 +1468,30 @@ func (w *writer) Commit() error {
})
}
// This is an edge case when we are trying to upload an empty chunk of data using
// a MultiPart upload. As a result we are trying to complete the MultipartUpload
// with an empty slice of `completedUploadedParts` which will always lead to 400
// being returned from S3 See: https://docs.aws.amazon.com/sdk-for-go/api/service/s3/#CompletedMultipartUpload
// Solution: we upload an empty i.e. 0 byte part as a single part and then append it
// to the completedUploadedParts slice used to complete the Multipart upload.
if len(w.parts) == 0 {
resp, err := w.driver.S3.UploadPart(&s3.UploadPartInput{
Bucket: aws.String(w.driver.Bucket),
Key: aws.String(w.key),
PartNumber: aws.Int64(1),
UploadId: aws.String(w.uploadID),
Body: bytes.NewReader(nil),
})
if err != nil {
return err
}
completedUploadedParts = append(completedUploadedParts, &s3.CompletedPart{
ETag: resp.ETag,
PartNumber: aws.Int64(1),
})
}
sort.Sort(completedUploadedParts)
_, err = w.driver.S3.CompleteMultipartUpload(&s3.CompleteMultipartUploadInput{