fixed(fs):fixed overwrite functions (#469)

* fixed(fs):fixed overwrite functions

Author: Suyunmeng

server/handles/fsmanage.go

@@ -88,6 +88,15 @@ func FsMove(c *gin.Context) {
 		common.ErrorResp(c, err, 403)
 		return
 	}
+
+	if !req.Overwrite {
+		for _, name := range req.Names {
+			if res, _ := fs.Get(c, stdpath.Join(dstDir, name), &fs.GetArgs{NoLog: true}); res != nil {
+				common.ErrorStrResp(c, fmt.Sprintf("file [%s] exists", name), 403)
+				return
+			}
+		}
+	}
 
 	// Create all tasks immediately without any synchronous validation
 	// All validation will be done asynchronously in the background
@@ -141,6 +150,15 @@ func FsCopy(c *gin.Context) {
 		common.ErrorResp(c, err, 403)
 		return
 	}
+
+	if !req.Overwrite {
+		for _, name := range req.Names {
+			if res, _ := fs.Get(c, stdpath.Join(dstDir, name), &fs.GetArgs{NoLog: true}); res != nil {
+				common.ErrorStrResp(c, fmt.Sprintf("file [%s] exists", name), 403)
+				return
+			}
+		}
+	}
 
 	// Create all tasks immediately without any synchronous validation
 	// All validation will be done asynchronously in the background