remove transport draft, add grpc web and gateway support

service/gateway.go

@@ -0,0 +1,29 @@
+package service
+
+import (
+	"net/http"
+
+	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
+)
+
+var defaultGatewayOptions = []runtime.ServeMuxOption{
+	runtime.WithIncomingHeaderMatcher(func(s string) (string, bool) {
+		return s, true
+	}),
+}
+
+func (s *service) gateway(opts ...runtime.ServeMuxOption) error {
+	if !s.opts.Gateway() {
+		return nil
+	}
+	mux := runtime.NewServeMux(append(defaultGatewayOptions, opts...)...)
+	if err := s.opts.gateway(s.opts.ctx, mux, s.inproc); err != nil {
+		return err
+	}
+	if s.opts.gatewayPrefix != "" {
+		s.mux.Handle(s.opts.gatewayPrefix+"/", http.StripPrefix(s.opts.gatewayPrefix, mux))
+	} else {
+		s.mux.Handle("/", mux)
+	}
+	return nil
+}