remove transport draft, add grpc web and gateway support

service/web.go

@@ -0,0 +1,35 @@
+package service
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/improbable-eng/grpc-web/go/grpcweb"
+)
+
+var defaultWebOptions = []grpcweb.Option{
+	grpcweb.WithWebsockets(true),
+	grpcweb.WithWebsocketOriginFunc(func(req *http.Request) bool {
+		return true
+	}),
+	grpcweb.WithCorsForRegisteredEndpointsOnly(false),
+	grpcweb.WithOriginFunc(func(origin string) bool {
+		return true
+	}),
+	grpcweb.WithWebsocketPingInterval(time.Second),
+}
+
+func (s *service) grpcWeb(opts ...grpcweb.Option) error {
+	if !s.opts.grpcWeb {
+		return nil
+	}
+	h := grpcweb.WrapServer(s.server, opts...)
+	for _, v := range grpcweb.ListGRPCResources(s.server) {
+		if s.opts.grpcWebPrefix != "" {
+			s.mux.Handle(s.opts.grpcWebPrefix+v, http.StripPrefix(s.opts.grpcWebPrefix, h))
+		} else {
+			s.mux.Handle(v, h)
+		}
+	}
+	return nil
+}