feat: unsupport transfer continuing when uploading folder or multi-files

cmd/upload/app/handler4.go

@@ -395,7 +395,8 @@ func (a *appController) UploadChunks(c *fiber.Ctx) error {
 	for retry := 0; retry < maxRetries; retry++ {
 		if info.Offset == offset || offset == 0 {
 			if info.Offset != offset {
-				fileutils.RemoveTempFile4(innerIdentifier, uploadsDir)
+				fmt.Println("Retransfering innerIdentifier:", innerIdentifier, ", uploadsDir:", uploadsDir, ", info.Offset:", info.Offset)
+				fileutils.ClearTempFileContent(innerIdentifier, uploadsDir)
 				info.Offset = offset
 			}
 

pkg/upload/fileutils/file.go

@@ -310,11 +310,11 @@ func removeInfoFile(uid string) {
 }
 
 func RemoveTempFileAndInfoFile4(uid string, uploadsDir string) {
-	RemoveTempFile4(uid, uploadsDir)
+	removeTempFile4(uid, uploadsDir)
 	removeInfoFile4(uid, uploadsDir)
 }
 
-func RemoveTempFile4(uid string, uploadsDir string) {
+func removeTempFile4(uid string, uploadsDir string) {
 	filePath := filepath.Join(uploadsDir, uid)
 	err := os.Remove(filePath)
 	if err != nil {
@@ -323,6 +323,22 @@ func RemoveTempFile4(uid string, uploadsDir string) {
 
 }
 
+func ClearTempFileContent(uid string, uploadsDir string) {
+	filePath := filepath.Join(uploadsDir, uid)
+
+	file, err := os.OpenFile(filePath, os.O_WRONLY|os.O_TRUNC, 0666)
+	if err != nil {
+		klog.Warningf("failed to open file %s: %v", filePath, err)
+		return
+	}
+	defer file.Close()
+
+	err = file.Truncate(0)
+	if err != nil {
+		klog.Warningf("failed to truncate file %s: %v", filePath, err)
+	}
+}
+
 func MoveFileByInfo4(fileInfo models.FileInfo, uploadsDir string) error {
 	// Construct file path
 	filePath := filepath.Join(uploadsDir, fileInfo.ID)