From 2a8c7e1ba08dff0f8d211769e3324d8616d6328f Mon Sep 17 00:00:00 2001
From: lgbgbl <lgbgbl@qq.com>
Date: Sun, 11 Dec 2022 22:45:26 +0800
Subject: [PATCH] refactor: avoid calling strings.ToLower twice

---
 recovery.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/recovery.go b/recovery.go
index 3a90f2505c..2955c03a0e 100644
--- a/recovery.go
+++ b/recovery.go
@@ -62,7 +62,9 @@ func CustomRecoveryWithWriter(out io.Writer, handle RecoveryFunc) HandlerFunc {
 				if ne, ok := err.(*net.OpError); ok {
 					var se *os.SyscallError
 					if errors.As(ne, &se) {
-						if strings.Contains(strings.ToLower(se.Error()), "broken pipe") || strings.Contains(strings.ToLower(se.Error()), "connection reset by peer") {
+						seStr := strings.ToLower(se.Error())
+						if strings.Contains(seStr, "broken pipe") ||
+							strings.Contains(seStr, "connection reset by peer") {
 							brokenPipe = true
 						}
 					}