Further consolidate the libraries

service/grpc/examples/greeter/gateway/main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"net/http"
+
+	"github.com/golang/glog"
+	"github.com/grpc-ecosystem/grpc-gateway/runtime"
+	"google.golang.org/grpc"
+
+	hello "github.com/micro/examples/grpc/gateway/proto/hello"
+)
+
+var (
+	// the go.micro.srv.greeter address
+	endpoint = flag.String("endpoint", "localhost:9090", "go.micro.srv.greeter address")
+)
+
+func run() error {
+	ctx := context.Background()
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	mux := runtime.NewServeMux()
+	opts := []grpc.DialOption{grpc.WithInsecure()}
+
+	err := hello.RegisterSayHandlerFromEndpoint(ctx, mux, *endpoint, opts)
+	if err != nil {
+		return err
+	}
+
+	return http.ListenAndServe(":8080", mux)
+}
+
+func main() {
+	flag.Parse()
+
+	defer glog.Flush()
+
+	if err := run(); err != nil {
+		glog.Fatal(err)
+	}
+}