Golang generator.New函數代碼示例

func Generate(req *plugin.CodeGeneratorRequest) *plugin.CodeGeneratorResponse {
	// Begin by allocating a generator. The request and response structures are stored there
	// so we can do error handling easily - the response structure contains the field to
	// report failure.
	g := generator.New()
	g.Request = req

	g.CommandLineParameters(g.Request.GetParameter())

	// Create a wrapped version of the Descriptors and EnumDescriptors that
	// point to the file that defines them.
	g.WrapTypes()

	g.SetPackageNames()
	g.BuildTypeNameMap()

	g.GenerateAllFiles()

	gtest := generator.New()

	data, err := proto.Marshal(req)
	if err != nil {
		g.Error(err, "failed to marshal modified proto")
	}
	if err := proto.Unmarshal(data, gtest.Request); err != nil {
		g.Error(err, "parsing modified proto")
	}

	if len(gtest.Request.FileToGenerate) == 0 {
		gtest.Fail("no files to generate")
	}

	gtest.CommandLineParameters(gtest.Request.GetParameter())

	// Create a wrapped version of the Descriptors and EnumDescriptors that
	// point to the file that defines them.
	gtest.WrapTypes()

	gtest.SetPackageNames()
	gtest.BuildTypeNameMap()

	gtest.GeneratePlugin(testgen.NewPlugin())

	for i := 0; i < len(gtest.Response.File); i++ {
		if strings.Contains(*gtest.Response.File[i].Content, `//These tests are generated by github.com/gogo/protobuf/plugin/testgen`) {
			gtest.Response.File[i].Name = proto.String(strings.Replace(*gtest.Response.File[i].Name, ".pb.go", "pb_test.go", -1))
			g.Response.File = append(g.Response.File, gtest.Response.File[i])
		}
	}

	for i := 0; i < len(g.Response.File); i++ {
		formatted, err := format.Source([]byte(g.Response.File[i].GetContent()))
		if err != nil {
			g.Error(err, "go format error")
		}
		fmts := string(formatted)
		g.Response.File[i].Content = &fmts
	}
	return g.Response
}

func Generate(req *plugin.CodeGeneratorRequest) *plugin.CodeGeneratorResponse {
	// Begin by allocating a generator. The request and response structures are stored there
	// so we can do error handling easily - the response structure contains the field to
	// report failure.
	g := generator.New()
	g.Request = req

	g.CommandLineParameters(g.Request.GetParameter())

	// Create a wrapped version of the Descriptors and EnumDescriptors that
	// point to the file that defines them.
	g.WrapTypes()

	g.SetPackageNames()
	g.BuildTypeNameMap()

	g.GenerateAllFiles()

	if err := goformat(g.Response); err != nil {
		g.Error(err)
	}

	testReq := proto.Clone(req).(*plugin.CodeGeneratorRequest)

	testResp := GeneratePlugin(testReq, testgen.NewPlugin(), "pb_test.go")

	for i := 0; i < len(testResp.File); i++ {
		if strings.Contains(*testResp.File[i].Content, `//These tests are generated by github.com/gogo/protobuf/plugin/testgen`) {
			g.Response.File = append(g.Response.File, testResp.File[i])
		}
	}

	return g.Response
}

func Write(resp *plugin.CodeGeneratorResponse) {
	g := generator.New()
	// Send back the results.
	data, err := proto.Marshal(resp)
	if err != nil {
		g.Error(err, "failed to marshal output proto")
	}
	_, err = os.Stdout.Write(data)
	if err != nil {
		g.Error(err, "failed to write output proto")
	}
}

func Read() *plugin.CodeGeneratorRequest {
	g := generator.New()
	data, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		g.Error(err, "reading input")
	}

	if err := proto.Unmarshal(data, g.Request); err != nil {
		g.Error(err, "parsing input proto")
	}

	if len(g.Request.FileToGenerate) == 0 {
		g.Fail("no files to generate")
	}
	return g.Request
}

func TestCreateCustom(t *testing.T) {
	desc, err := parser.ParseFile("form.proto", ".")
	if err != nil {
		t.Fatal(err)
	}
	g := generator.New()
	g.Request = &plugin.CodeGeneratorRequest{ProtoFile: desc.File}
	g.Request.FileToGenerate = []string{"form.proto"}
	g.Request.Parameter = proto.String("plugins=grpc")
	g.CommandLineParameters(g.Request.GetParameter())
	g.WrapTypes()
	g.SetPackageNames()
	g.BuildTypeNameMap()
	g.Reset()
	g.SetFile(desc.File[0])
	formStr = CreateCustom("WeirdMethod", "form", "Weird", g, CustomBuildField)
	server := http.Server{
		Addr:    "localhost:8080",
		Handler: http.HandlerFunc(handle),
	}
	lis, err := net.Listen("tcp", "localhost:8080")
	if err != nil {
		t.Fatalf("Failed to listen: %v", err)
	}
	defer lis.Close()
	go server.Serve(lis)
	resp, err := http.Get("http://localhost:8080/WeirdMethod?json={%22Name%22:%22%22,%22WeirdName%22:%22another%20string%22,%22Number%22:null}")
	if err != nil {
		t.Fatal(err)
	}
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("%s", string(body))
	if strings.Contains(string(body), "404") {
		t.Fatal("404")
	}
	if !strings.Contains(string(body), `"WeirdName":"another string"`) {
		t.Fatal("could not find json value")
	}
}

func main() {
	gen := generator.New()

	data, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		gen.Error(err, "reading input")
	}

	if err := proto.Unmarshal(data, gen.Request); err != nil {
		gen.Error(err, "parsing input proto")
	}

	if len(gen.Request.FileToGenerate) == 0 {
		gen.Fail("no files to generate")
	}

	gen.CommandLineParameters(gen.Request.GetParameter())

	gen.WrapTypes()
	gen.SetPackageNames()
	gen.BuildTypeNameMap()
	gen.GeneratePlugin(html.New())

	for i := 0; i < len(gen.Response.File); i++ {
		gen.Response.File[i].Name = proto.String(strings.Replace(*gen.Response.File[i].Name, ".pb.go", ".letmegrpc.go", -1))
	}

	// Send back the results.
	data, err = proto.Marshal(gen.Response)
	if err != nil {
		gen.Error(err, "failed to marshal output proto")
	}
	_, err = os.Stdout.Write(data)
	if err != nil {
		gen.Error(err, "failed to write output proto")
	}
}

// filenameSuffix replaces the .pb.go at the end of each filename.
func GeneratePlugin(req *plugin.CodeGeneratorRequest, p generator.Plugin, filenameSuffix string) *plugin.CodeGeneratorResponse {
	g := generator.New()
	g.Request = req
	if len(g.Request.FileToGenerate) == 0 {
		g.Fail("no files to generate")
	}

	g.CommandLineParameters(g.Request.GetParameter())

	g.WrapTypes()
	g.SetPackageNames()
	g.BuildTypeNameMap()
	g.GeneratePlugin(p)

	for i := 0; i < len(g.Response.File); i++ {
		g.Response.File[i].Name = proto.String(
			strings.Replace(*g.Response.File[i].Name, ".pb.go", filenameSuffix, -1),
		)
	}
	if err := goformat(g.Response); err != nil {
		g.Error(err)
	}
	return g.Response
}