fix bug：slice bounds out of range

wangdiyu · Jun 3, 2021 · 16253e3 · 16253e3
1 parent 9e3e977
commit 16253e3
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/app/aliyun/tool.go b/app/aliyun/tool.go
@@ -395,6 +395,9 @@ func SubString(str string , begin int ,length int) (substr string) {
 	if begin >= lth {
 		begin = lth
 	}
+	if length < 0 {
+		length = 0
+	}
 	end := begin + length
 	if end > lth {
 		end = lth