api/router/registry: extract path based parameters from url to req (#1530)

* api/router/registry: extract path based parameters from url to req
* api/handler/rpc: fix empty body request parsing
* bundle grpc-gateway util funcs

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

api/router/router_test.go

@@ -0,0 +1,153 @@
+package router_test
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/micro/go-micro/v2/api"
+	"github.com/micro/go-micro/v2/api/handler"
+	"github.com/micro/go-micro/v2/api/handler/rpc"
+	"github.com/micro/go-micro/v2/api/router"
+	rregistry "github.com/micro/go-micro/v2/api/router/registry"
+	rstatic "github.com/micro/go-micro/v2/api/router/static"
+	"github.com/micro/go-micro/v2/client"
+	gcli "github.com/micro/go-micro/v2/client/grpc"
+	rmemory "github.com/micro/go-micro/v2/registry/memory"
+	"github.com/micro/go-micro/v2/server"
+	gsrv "github.com/micro/go-micro/v2/server/grpc"
+	pb "github.com/micro/go-micro/v2/server/grpc/proto"
+)
+
+// server is used to implement helloworld.GreeterServer.
+type testServer struct {
+	msgCount int
+}
+
+// TestHello implements helloworld.GreeterServer
+func (s *testServer) Call(ctx context.Context, req *pb.Request, rsp *pb.Response) error {
+	rsp.Msg = "Hello " + req.Uuid
+	return nil
+}
+
+func initial(t *testing.T) (server.Server, client.Client) {
+	r := rmemory.NewRegistry()
+
+	// create a new client
+	s := gsrv.NewServer(
+		server.Name("foo"),
+		server.Registry(r),
+	)
+
+	// create a new server
+	c := gcli.NewClient(
+		client.Registry(r),
+	)
+
+	h := &testServer{}
+	pb.RegisterTestHandler(s, h)
+
+	if err := s.Start(); err != nil {
+		t.Fatalf("failed to start: %v", err)
+	}
+
+	return s, c
+}
+
+func check(addr string, t *testing.T) {
+	req, err := http.NewRequest("POST", fmt.Sprintf("http://%s/api/v0/test/call/TEST", addr), nil)
+	if err != nil {
+		t.Fatalf("Failed to created http.Request: %v", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	rsp, err := (&http.Client{}).Do(req)
+	if err != nil {
+		t.Fatalf("Failed to created http.Request: %v", err)
+	}
+	defer rsp.Body.Close()
+
+	buf, err := ioutil.ReadAll(rsp.Body)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	jsonMsg := `{"msg":"Hello TEST"}`
+	if string(buf) != jsonMsg {
+		t.Fatalf("invalid message received, parsing error %s != %s", buf, jsonMsg)
+	}
+}
+
+func TestRouterRegistry(t *testing.T) {
+	s, c := initial(t)
+	defer s.Stop()
+
+	router := rregistry.NewRouter(
+		router.WithHandler(rpc.Handler),
+		router.WithRegistry(s.Options().Registry),
+	)
+	hrpc := rpc.NewHandler(
+		handler.WithClient(c),
+		handler.WithRouter(router),
+	)
+	hsrv := &http.Server{
+		Handler:        hrpc,
+		Addr:           "127.0.0.1:6543",
+		WriteTimeout:   15 * time.Second,
+		ReadTimeout:    15 * time.Second,
+		IdleTimeout:    20 * time.Second,
+		MaxHeaderBytes: 1024 * 1024 * 1, // 1Mb
+	}
+
+	go func() {
+		log.Println(hsrv.ListenAndServe())
+	}()
+
+	defer hsrv.Close()
+	time.Sleep(1 * time.Second)
+	check(hsrv.Addr, t)
+}
+
+func TestRouterStatic(t *testing.T) {
+	s, c := initial(t)
+	defer s.Stop()
+
+	router := rstatic.NewRouter(
+		router.WithHandler(rpc.Handler),
+		router.WithRegistry(s.Options().Registry),
+	)
+
+	err := router.Register(&api.Endpoint{
+		Name:    "foo.Test.Call",
+		Method:  []string{"POST"},
+		Path:    []string{"/api/v0/test/call/{uuid}"},
+		Handler: "rpc",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	hrpc := rpc.NewHandler(
+		handler.WithClient(c),
+		handler.WithRouter(router),
+	)
+	hsrv := &http.Server{
+		Handler:        hrpc,
+		Addr:           "127.0.0.1:6543",
+		WriteTimeout:   15 * time.Second,
+		ReadTimeout:    15 * time.Second,
+		IdleTimeout:    20 * time.Second,
+		MaxHeaderBytes: 1024 * 1024 * 1, // 1Mb
+	}
+
+	go func() {
+		log.Println(hsrv.ListenAndServe())
+	}()
+	defer hsrv.Close()
+
+	time.Sleep(1 * time.Second)
+	check(hsrv.Addr, t)
+}