refactor a bit

weed/operation/upload_content.go

@@ -45,11 +45,9 @@ var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
 
 // Upload sends a POST request to a volume server to upload the content with adjustable compression level
 func UploadData(uploadUrl string, filename string, cipher bool, data []byte, isInputGzipped bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error) {
-	hash := md5.New()
-	hash.Write(data)
 	uploadResult, err = doUploadData(uploadUrl, filename, cipher, data, isInputGzipped, mtype, pairMap, jwt)
 	if uploadResult != nil {
-		uploadResult.Md5 = fmt.Sprintf("%x", hash.Sum(nil))
+		uploadResult.Md5 = util.Md5(data)
 	}
 	return
 }