提升文件上传体验 (#4393)

* 上传文件支持覆盖被占用的文件且上传失败时不影响原文件,增加强制覆盖选项

* 原文件存在时,保持同样的文件权限

* 制表符更新

backend/app/api/v1/file.go

@@ -303,6 +303,15 @@ func (b *BaseApi) UploadFiles(c *gin.Context) {
 	}
 	files := form.File["file"]
 	paths := form.Value["path"]
+	
+	overwrite := true
+	if ow, ok := form.Value["overwrite"]; ok {
+		if len(ow) != 0 {
+			parseBool, _ := strconv.ParseBool(ow[0])
+			overwrite = parseBool
+		}
+	}
+	
 	if len(paths) == 0 || !strings.Contains(paths[0], "/") {
 		helper.ErrorWithDetail(c, constant.CodeErrBadRequest, constant.ErrTypeInvalidParams, errors.New("error paths in request"))
 		return
@@ -317,12 +326,31 @@ func (b *BaseApi) UploadFiles(c *gin.Context) {
 	success := 0
 	failures := make(buserr.MultiErr)
 	for _, file := range files {
-		if err := c.SaveUploadedFile(file, path.Join(paths[0], file.Filename)); err != nil {
+		dstFilename := path.Join(paths[0], file.Filename)
+		tmpFilename := dstFilename + ".tmp"
+		if err := c.SaveUploadedFile(file, tmpFilename); err != nil {
+			_ = os.Remove(tmpFilename)
 			e := fmt.Errorf("upload [%s] file failed, err: %v", file.Filename, err)
 			failures[file.Filename] = e
 			global.LOG.Error(e)
 			continue
 		}
+		stat, statErr := os.Stat(dstFilename)
+		if overwrite {
+			_ = os.Remove(dstFilename)
+		}
+		
+		err = os.Rename(tmpFilename, dstFilename)
+		if err != nil {
+			_ = os.Remove(tmpFilename)
+			e := fmt.Errorf("upload [%s] file failed, err: %v", file.Filename, err)
+			failures[file.Filename] = e
+			global.LOG.Error(e)
+			continue
+		}
+		if statErr == nil {
+			_ = os.Chmod(dstFilename, stat.Mode())
+		}
 		success++
 	}
 	if success == 0 {