fix: return S3 XML error from uploadPart on invalid partPath

skyoo2003 · skyoo2003 · commit 23d9d7879bb8 · 2026-04-30T08:30:08.000+09:00
Map partPath errors to InvalidRequest XML response (400) instead of
bubbling up as a raw 500, consistent with completeMultipartUpload.
diff --git a/internal/services/s3/provider.go b/internal/services/s3/provider.go
@@ -889,7 +889,7 @@ func (p *S3Provider) uploadPart(_ context.Context, bucket, key, uploadID, partNu
 
 	partFile, err := p.partPath(uploadID, partNumber)
 	if err != nil {
-		return nil, err
+		return xmlError("InvalidRequest", "invalid multipart request", http.StatusBadRequest), nil
 	}
 	if err := os.WriteFile(partFile, data, 0o644); err != nil {
 		return nil, err

Original file line number	Diff line number	Diff line change
`@@ -889,7 +889,7 @@ func (p *S3Provider) uploadPart(_ context.Context, bucket, key, uploadID, partNu`
`889`	`889`
`890`	`890`	`partFile, err := p.partPath(uploadID, partNumber)`
`891`	`891`	`if err != nil {`
`892`		`- return nil, err`
	`892`	`+ return xmlError("InvalidRequest", "invalid multipart request", http.StatusBadRequest), nil`
`893`	`893`	`}`
`894`	`894`	`if err := os.WriteFile(partFile, data, 0o644); err != nil {`
`895`	`895`	`return nil, err`