diff --git a/handler/health/health.go b/handler/health/health.go
index 4399cf3..e1e0dda 100644
--- a/handler/health/health.go
+++ b/handler/health/health.go
@@ -1,4 +1,4 @@
-package health // import "go.unistack.org/micro-server-http/v3/handler/health"
+package health_handler
 
 import (
 	"context"
diff --git a/handler/meter/meter.go b/handler/meter/meter.go
index 986e215..8ee02f0 100644
--- a/handler/meter/meter.go
+++ b/handler/meter/meter.go
@@ -1,4 +1,4 @@
-package meter // import "go.unistack.org/micro-server-http/v3/handler/meter"
+package meter_handler
 
 import (
 	"bytes"
diff --git a/handler/pprof/pprof.go b/handler/pprof/pprof.go
index 636eab1..d74f637 100644
--- a/handler/pprof/pprof.go
+++ b/handler/pprof/pprof.go
@@ -1,4 +1,4 @@
-package pprof
+package pprof_handler
 
 import (
 	"expvar"
diff --git a/handler/swagger-ui/swaggerui.go b/handler/swagger-ui/swaggerui.go
index 3a30c69..cd486db 100644
--- a/handler/swagger-ui/swaggerui.go
+++ b/handler/swagger-ui/swaggerui.go
@@ -1,4 +1,4 @@
-package swaggerui // import "go.unistack.org/micro-server-http/v3/handler/swagger-ui"
+package swaggerui_handler
 
 import (
 	"embed"
diff --git a/handler/swagger/swagger.go b/handler/swagger/swagger.go
index 15533d8..5daf7d1 100644
--- a/handler/swagger/swagger.go
+++ b/handler/swagger/swagger.go
@@ -1,4 +1,4 @@
-package swagger
+package swagger_handler
 
 import (
 	"io/fs"
diff --git a/http.go b/http.go
index 1cc09a4..52fa01d 100644
--- a/http.go
+++ b/http.go
@@ -35,7 +35,6 @@ type Server struct {
 	pathHandlers *rhttp.Trie
 	opts         server.Options
 	registerRPC  bool
-	registerCORS bool
 	sync.RWMutex
 	registered bool
 	init       bool
@@ -518,7 +517,7 @@ func (h *Server) Start() error {
 	}
 
 	if config.Logger.V(logger.InfoLevel) {
-		config.Logger.Infof(config.Context, "Listening on %s", ts.Addr().String())
+		config.Logger.Info(config.Context, "Listening on "+ts.Addr().String())
 	}
 
 	h.Lock()
@@ -562,7 +561,7 @@ func (h *Server) Start() error {
 
 	if err := config.RegisterCheck(h.opts.Context); err != nil {
 		if config.Logger.V(logger.ErrorLevel) {
-			config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, err)
+			config.Logger.Error(config.Context, fmt.Sprintf("Server %s-%s register check error", config.Name, config.ID) err)
 		}
 	} else {
 		if err = h.Register(); err != nil {
@@ -594,7 +593,7 @@ func (h *Server) Start() error {
 
 	go func() {
 		if cerr := hs.Serve(ts); cerr != nil && !errors.Is(cerr, net.ErrClosed) {
-			h.opts.Logger.Error(h.opts.Context, cerr)
+			h.opts.Logger.Error(h.opts.Context, "serve error", cerr)
 		}
 	}()
 
@@ -622,28 +621,28 @@ func (h *Server) Start() error {
 				// nolint: nestif
 				if rerr != nil && registered {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s, deregister it", config.Name, config.ID, rerr)
+						config.Logger.Error(config.Context,fmt.Sprintf("Server %s-%s register check error, deregister it", config.Name, config.ID), rerr)
 					}
 					// deregister self in case of error
 					if err := h.Deregister(); err != nil {
 						if config.Logger.V(logger.ErrorLevel) {
-							config.Logger.Errorf(config.Context, "Server %s-%s deregister error: %s", config.Name, config.ID, err)
+							config.Logger.Error(config.Context, fmt.Sprintf("Server %s-%s deregister error", config.Name, config.ID), err)
 						}
 					}
 				} else if rerr != nil && !registered {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, rerr)
+						config.Logger.Error(config.Context, fmt.Sprintf("Server %s-%s register check error", config.Name, config.ID), rerr)
 					}
 					continue
 				}
 				if err := h.Register(); err != nil {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register error: %s", config.Name, config.ID, err)
+						config.Logger.Error(config.Context, fmt.Sprintf("Server %s-%s register error: %s", config.Name, config.ID), err)
 					}
 				}
 
 				if err := h.Register(); err != nil {
-					config.Logger.Errorf(config.Context, "Server register error: %s", err)
+					config.Logger.Error(config.Context, "Server register error", err)
 				}
 			// wait for exit
 			case ch = <-h.exit:
@@ -653,11 +652,11 @@ func (h *Server) Start() error {
 
 		// deregister
 		if err := h.Deregister(); err != nil {
-			config.Logger.Errorf(config.Context, "Server deregister error: %s", err)
+			config.Logger.Error(config.Context, "Server deregister error", err)
 		}
 
 		if err := config.Broker.Disconnect(config.Context); err != nil {
-			config.Logger.Errorf(config.Context, "Broker disconnect error: %s", err)
+			config.Logger.Error(config.Context, "Broker disconnect error", err)
 		}
 
 		ctx, cancel := context.WithTimeout(context.Background(), h.opts.GracefulTimeout)