diff --git a/app.go b/app.go
index 0527d35..0882caf 100644
--- a/app.go
+++ b/app.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	_ "git.diulo.com/mogfee/kit/encoding/form"
 	_ "git.diulo.com/mogfee/kit/encoding/json"
+	_ "git.diulo.com/mogfee/kit/encoding/xml"
 	"git.diulo.com/mogfee/kit/log"
 	"git.diulo.com/mogfee/kit/registry"
 	"git.diulo.com/mogfee/kit/transport"
diff --git a/transport/http/codec.go b/transport/http/codec.go
index 089b9e6..b1636ac 100644
--- a/transport/http/codec.go
+++ b/transport/http/codec.go
@@ -37,6 +37,7 @@ func DefaultRequestQuery(r *http.Request, v any) error {
 	return binding.BindQuery(r.URL.Query(), v)
 }
 func DefaultRequestDecoder(r *http.Request, v any) error {
+	fmt.Println("DefaultRequestDecoder")
 	codec, ok := CodeForRequest(r, "Content-type")
 	fmt.Println("request decoder", ok)
 	if !ok {
@@ -56,7 +57,7 @@ func DefaultRequestDecoder(r *http.Request, v any) error {
 	return nil
 }
 func DefaultResponseEncoder(w http.ResponseWriter, r *http.Request, v any) error {
-	fmt.Println("response encode")
+	fmt.Println("DefaultResponseEncoder")
 	if v == nil {
 		return nil
 	}
@@ -75,6 +76,7 @@ func DefaultResponseEncoder(w http.ResponseWriter, r *http.Request, v any) error
 	return err
 }
 func DefaultErrorEncoder(w http.ResponseWriter, r *http.Request, err error) {
+	fmt.Println("DefaultErrorEncoder")
 	se := errors.FromError(err)
 	codec, _ := CodeForRequest(r, "Accept")
 	body, err := codec.Marshal(se)
@@ -87,7 +89,6 @@ func DefaultErrorEncoder(w http.ResponseWriter, r *http.Request, err error) {
 	_, _ = w.Write(body)
 }
 func CodeForRequest(r *http.Request, name string) (encoding.Codec, bool) {
-	fmt.Printf("rr%+v\n", r.Header)
 	for _, accept := range r.Header[name] {
 		a := httputil.ContentSubtype(accept)
 		fmt.Println(name, a)