diff --git a/internal/config/config.go b/internal/config/config.go
index 78a61ec..f91a783 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -38,30 +38,30 @@ type Config struct {
 	Refer     string            `yaml:"refer"`
 }
 
-var Instance Config
+var GlobalConfig Config
 
 func init() {
-	flag.Var(&Instance.Addrs, "addr", "监听地址，例如 :7788 。支持多个地址。默认监听 :7788")
-	flag.BoolVar(&Instance.UseTls, "tls", false, "是否使用tls")
-	flag.StringVar(&Instance.Cert, "cert", "cert.pem", "tls证书")
-	flag.StringVar(&Instance.PrivKey, "key", "privkey.pem", "tls私钥")
-	flag.StringVar(&Instance.LogPath, "log", "/tmp/proxy.log", "日志文件路径")
-	flag.StringVar(&Instance.WebPath, "content", ".", "文件服务器目录")
-	flag.Var(&Instance.Users, "user", "Basic认证的用户名密码，例如username:password")
-	flag.StringVar(&Instance.Refer, "refer", "", "本站的referer特征")
+	flag.Var(&GlobalConfig.Addrs, "addr", "监听地址，例如 :7788 。支持多个地址。默认监听 :7788")
+	flag.BoolVar(&GlobalConfig.UseTls, "tls", false, "是否使用tls")
+	flag.StringVar(&GlobalConfig.Cert, "cert", "cert.pem", "tls证书")
+	flag.StringVar(&GlobalConfig.PrivKey, "key", "privkey.pem", "tls私钥")
+	flag.StringVar(&GlobalConfig.LogPath, "log", "/tmp/proxy.log", "日志文件路径")
+	flag.StringVar(&GlobalConfig.WebPath, "content", ".", "文件服务器目录")
+	flag.Var(&GlobalConfig.Users, "user", "Basic认证的用户名密码，例如username:password")
+	flag.StringVar(&GlobalConfig.Refer, "refer", "", "本站的referer特征")
 	flag.Parse()
-	if len(Instance.Addrs) == 0 {
-		Instance.Addrs = append(Instance.Addrs, ":7788")
+	if len(GlobalConfig.Addrs) == 0 {
+		GlobalConfig.Addrs = append(GlobalConfig.Addrs, ":7788")
 	}
-	Instance.BasicAuth = make(map[string]string)
-	for _, user := range Instance.Users {
+	GlobalConfig.BasicAuth = make(map[string]string)
+	for _, user := range GlobalConfig.Users {
 		base64Encode := "Basic " + base64.StdEncoding.EncodeToString([]byte(user))
-		Instance.BasicAuth[base64Encode] = strings.Split(user, ":")[0]
+		GlobalConfig.BasicAuth[base64Encode] = strings.Split(user, ":")[0]
 	}
 	initLog()
-	out, err := yaml.Marshal(Instance)
+	out, err := yaml.Marshal(GlobalConfig)
 	if err != nil {
-		log.Println("go web server config:", Instance)
+		log.Println("go web server config:", GlobalConfig)
 	} else {
 		log.Printf("go web server config: \n%s", string(out))
 	}
@@ -117,7 +117,7 @@ func init() {
 //}
 
 func initLog() {
-	file := Instance.LogPath
+	file := GlobalConfig.LogPath
 	rollingFile := &lumberjack.Logger{
 		Filename:   file,
 		MaxSize:    50,
diff --git a/internal/server/connectHandlerFunc.go b/internal/server/connectHandlerFunc.go
index 0ed36cb..d920f4b 100644
--- a/internal/server/connectHandlerFunc.go
+++ b/internal/server/connectHandlerFunc.go
@@ -20,10 +20,10 @@ func dialContextCheckACL(network, hostPort string) (net.Conn, error) {
 
 func connect(w http.ResponseWriter, r *http.Request) {
 	clientAddr := strings.Split(r.RemoteAddr, ":")[0]
-	var username string;
-	if len(config.Instance.BasicAuth) != 0 {
-		var ok bool;
-		username, ok = config.Instance.BasicAuth[r.Header.Get("proxy-authorization")]
+	var username string
+	if len(config.GlobalConfig.BasicAuth) != 0 {
+		var ok bool
+		username, ok = config.GlobalConfig.BasicAuth[r.Header.Get("proxy-authorization")]
 		if !ok {
 			log.Println("wrong basic auth from", clientAddr)
 			http.Error(w, "InternalServerError", http.StatusInternalServerError)
@@ -56,7 +56,7 @@ func connect(w http.ResponseWriter, r *http.Request) {
 
 	switch r.ProtoMajor {
 	case 1: // http1: hijack the whole flow
-		_, err := serveHijack(w, targetConn, clientAddr, hostPort,username)
+		_, err := serveHijack(w, targetConn, clientAddr, hostPort, username)
 		if err != nil {
 			log.Println(err, r.RemoteAddr)
 		}
@@ -74,7 +74,7 @@ func connect(w http.ResponseWriter, r *http.Request) {
 			w.Header().Add("Server", "go_web_server")
 		}
 		wFlusher.Flush()
-		err := dualStream(targetConn, r.Body, w, clientAddr, hostPort,username)
+		err := dualStream(targetConn, r.Body, w, clientAddr, hostPort, username)
 		if err != nil {
 			log.Println(err, r.RemoteAddr)
 		}
@@ -86,7 +86,7 @@ func connect(w http.ResponseWriter, r *http.Request) {
 
 // Hijacks the connection from ResponseWriter, writes the response and proxies data between targetConn
 // and hijacked connection.
-func serveHijack(w http.ResponseWriter, targetConn net.Conn, clientAddr string, hostPort string,username string) (int, error) {
+func serveHijack(w http.ResponseWriter, targetConn net.Conn, clientAddr string, hostPort string, username string) (int, error) {
 	hijacker, ok := w.(http.Hijacker)
 	if !ok {
 		return http.StatusInternalServerError, errors.New("ResponseWriter does not implement Hijacker")
@@ -124,21 +124,21 @@ func serveHijack(w http.ResponseWriter, targetConn net.Conn, clientAddr string,
 		return http.StatusInternalServerError, errors.New("failed to send response to client: " + err.Error())
 	}
 
-	return 0, dualStream(targetConn, clientConn, clientConn, clientAddr, hostPort,username)
+	return 0, dualStream(targetConn, clientConn, clientConn, clientAddr, hostPort, username)
 }
 
 var bufferPool = &sync.Pool{New: func() interface{} {
 	return make([]byte, 32*1024)
 }}
 
-func dualStream(target net.Conn, clientReader io.ReadCloser, clientWriter io.Writer, clientAddr string, hostPort string,username string) error {
+func dualStream(target net.Conn, clientReader io.ReadCloser, clientWriter io.Writer, clientAddr string, hostPort string, username string) error {
 	stream := func(w io.Writer, r io.Reader) error {
 		// copy bytes from r to w
 		buf := bufferPool.Get().([]byte)
 		defer bufferPool.Put(buf)
 		buf = buf[0:cap(buf)]
 		nw, _err := flushingIoCopy(w, r, buf)
-		ProxyTraffic.WithLabelValues(clientAddr, hostPort,username).Add(float64(nw))
+		ProxyTraffic.WithLabelValues(clientAddr, hostPort, username).Add(float64(nw))
 		if closeWriter, ok := w.(interface {
 			CloseWrite() error
 		}); ok {
diff --git a/internal/server/httpHandlerFunc.go b/internal/server/httpHandlerFunc.go
index 652bfcd..1fedb58 100644
--- a/internal/server/httpHandlerFunc.go
+++ b/internal/server/httpHandlerFunc.go
@@ -24,7 +24,7 @@ func writeIp(w http.ResponseWriter, r *http.Request) {
 func fileHandlerFunc() http.HandlerFunc {
 
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if config.Instance.Refer != "" && r.Header.Get("referer") != "" && !strings.Contains(r.Header.Get("referer"), config.Instance.Refer) && (strings.HasSuffix(r.URL.Path, ".html") || strings.HasSuffix(r.URL.Path, "/")) {
+		if config.GlobalConfig.Refer != "" && r.Header.Get("referer") != "" && !strings.Contains(r.Header.Get("referer"), config.GlobalConfig.Refer) && (strings.HasSuffix(r.URL.Path, ".html") || strings.HasSuffix(r.URL.Path, "/")) {
 			HttpRequst.WithLabelValues(r.Header.Get("referer"), r.URL.Path).Inc()
 			HttpRequst.WithLabelValues("all", "all").Inc()
 		}
@@ -39,7 +39,7 @@ func fileHandlerFunc() http.HandlerFunc {
 			http.Error(w, "invalid URL path", http.StatusBadRequest)
 			return
 		}
-		fs := http.FileServer(http.Dir(config.Instance.WebPath))
+		fs := http.FileServer(http.Dir(config.GlobalConfig.WebPath))
 		http.StripPrefix("/", fs).ServeHTTP(w, r)
 	})
 }
diff --git a/internal/server/server.go b/internal/server/server.go
index 853a0e8..b992925 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -25,7 +25,7 @@ var (
 	ProxyTraffic = promauto.NewCounterVec(prometheus.CounterOpts{
 		Name: "proxy_traffic_total",
 		Help: "num proxy_traffic",
-	}, []string{"client", "target","username"})
+	}, []string{"client", "target", "username"})
 )
 
 func Serve() error {
@@ -35,7 +35,7 @@ func Serve() error {
 
 	errors := make(chan error)
 
-	instance := config.Instance
+	instance := config.GlobalConfig
 	handler := MineHandler{}
 	for _, addr := range instance.Addrs {
 		srv := &http.Server{