From eccf3c2be1b591b005466377f5777341802dc4be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=88=98=E6=B2=B3?= <cnliuhe@126.com>
Date: Wed, 4 Dec 2019 03:56:04 +0800
Subject: [PATCH] fix bug 250

---
 lib/conn/conn.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/conn/conn.go b/lib/conn/conn.go
index 8f19e6c..db03c40 100755
--- a/lib/conn/conn.go
+++ b/lib/conn/conn.go
@@ -87,7 +87,7 @@ func (s *Conn) GetShortContent(l int) (b []byte, err error) {
 
 //读取指定长度内容
 func (s *Conn) ReadLen(cLen int, buf []byte) (int, error) {
-	if cLen > len(buf) {
+	if cLen > len(buf) || cLen <= 0 {
 		return 0, errors.New("长度错误" + strconv.Itoa(cLen))
 	}
 	if n, err := io.ReadFull(s, buf[:cLen]); err != nil || n != cLen {