diff --git a/transport/http/codec.go b/transport/http/codec.go
index a90a702..357c471 100644
--- a/transport/http/codec.go
+++ b/transport/http/codec.go
@@ -87,6 +87,7 @@ 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("%+v\n", r.Header)
 	for _, accept := range r.Header[name] {
 		a := httputil.ContentSubtype(accept)
 		fmt.Println(name, a)