add sub router for http

examples/http/middlewares/handlers.go

@@ -9,7 +9,7 @@ import (
 
 func sayHelloHandler(ctx http.Context) error {
 	var in helloworld.HelloRequest
-	if err := ctx.Bind(&in); err != nil {
+	if err := ctx.BindQuery(&in); err != nil {
 		return err
 	}
 

examples/http/middlewares/main.go

@@ -30,6 +30,10 @@ func main() {
 	// add path filter to custom route
 	r.GET("/hello/{name}", sayHelloHandler, pathFilter, pathFilter2)
 
+	// add path filter to sub router
+	r2 := r.NewSubRouter("/v2", pathFilter, pathFilter2)
+	r2.GET("/say/{name}", sayHelloHandler)
+
 	app := kratos.New(
 		kratos.Name("helloworld"),
 		kratos.Server(

transport/http/router.go

@@ -29,6 +29,14 @@ func newRouter(prefix string, srv *Server, filters ...FilterFunc) *Router {
 	return r
 }
 
+// NewSubRouter returns a new sub router
+func (r *Router) NewSubRouter(prefix string, filters ...FilterFunc) *Router {
+	var newFilters []FilterFunc
+	newFilters = append(newFilters, r.filters...)
+	newFilters = append(newFilters, filters...)
+	return newRouter(path.Join(r.prefix, prefix), r.srv, newFilters...)
+}
+
 // Handle registers a new route with a matcher for the URL path and method.
 func (r *Router) Handle(method, relativePath string, h HandlerFunc, filters ...FilterFunc) {
 	next := http.Handler(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {

transport/http/server.go

@@ -86,6 +86,13 @@ func ErrorEncoder(en EncodeErrorFunc) ServerOption {
 	}
 }
 
+// Endpoint with server endpoint.
+func Endpoint(endpoint *url.URL) ServerOption {
+	return func(o *Server) {
+		o.endpoint = endpoint
+	}
+}
+
 // Server is an HTTP server wrapper.
 type Server struct {
 	*http.Server
@@ -185,6 +192,9 @@ func (s *Server) filter() mux.MiddlewareFunc {
 //   http://127.0.0.1:8000?isSecure=false
 func (s *Server) Endpoint() (*url.URL, error) {
 	s.once.Do(func() {
+		if s.endpoint != nil {
+			return
+		}
 		lis, err := net.Listen(s.network, s.address)
 		if err != nil {
 			s.err = err