From 7363f49ae34121b54de81d40214046dba4902586 Mon Sep 17 00:00:00 2001
From: Juvenn Woo <machese@gmail.com>
Date: Sat, 24 Aug 2024 16:44:50 +0800
Subject: [PATCH] metric-api: http server error handling

---
 experimental/metrics/server.go | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/experimental/metrics/server.go b/experimental/metrics/server.go
index 36e4083d..41215672 100644
--- a/experimental/metrics/server.go
+++ b/experimental/metrics/server.go
@@ -1,6 +1,8 @@
 package metrics
 
 import (
+	"errors"
+	"net"
 	"net/http"
 
 	"github.com/sagernet/sing-box/adapter"
@@ -53,12 +55,15 @@ func (s *metricServer) Start() error {
 	if !s.opts.Enabled() {
 		return nil
 	}
+	listener, err := net.Listen("tcp", s.opts.Listen)
+	if err != nil {
+		return err
+	}
+	s.logger.Info("metrics api listening at ", s.http.Addr, s.opts.Path)
 	go func() {
-		err := s.http.ListenAndServe()
-		if err != nil {
-			s.logger.Error("metrics api listen error", err)
-		} else {
-			s.logger.Info("metrics api listening at ", s.http.Addr, s.opts.Path)
+		err := s.http.Serve(listener)
+		if err != nil && !errors.Is(err, http.ErrServerClosed) {
+			s.logger.Error("metrics api serve error: ", err)
 		}
 	}()
 	return nil