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How to use Reflect method of grpcext Package

Best K6 code snippet using grpcext.Reflect

client.go

Source:client.go

...91	c.conn, err = grpcext.Dial(ctx, addr, opts...)92	if err != nil {93		return false, err94	}95	if !p.UseReflectionProtocol {96		return true, nil97	}98	fdset, err := c.conn.Reflect(ctx)99	if err != nil {100		return false, err101	}102	_, err = c.convertToMethodInfo(fdset)103	if err != nil {104		return false, fmt.Errorf("can't convert method info: %w", err)105	}106	return true, err107}108// Invoke creates and calls a unary RPC by fully qualified method name109func (c *Client) Invoke(110	method string,111	req goja.Value,112	params map[string]interface{},113) (*grpcext.Response, error) {114	state := c.vu.State()115	if state == nil {116		return nil, common.NewInitContextError("invoking RPC methods in the init context is not supported")117	}118	if c.conn == nil {119		return nil, errors.New("no gRPC connection, you must call connect first")120	}121	if method == "" {122		return nil, errors.New("method to invoke cannot be empty")123	}124	if method[0] != '/' {125		method = "/" + method126	}127	methodDesc := c.mds[method]128	if methodDesc == nil {129		return nil, fmt.Errorf("method %q not found in file descriptors", method)130	}131	p, err := c.parseParams(params)132	if err != nil {133		return nil, err134	}135	b, err := req.ToObject(c.vu.Runtime()).MarshalJSON()136	if err != nil {137		return nil, fmt.Errorf("unable to serialise request object: %w", err)138	}139	md := metadata.New(nil)140	for param, strval := range p.Metadata {141		md.Append(param, strval)142	}143	ctx, cancel := context.WithTimeout(c.vu.Context(), p.Timeout)144	defer cancel()145	tags := state.CloneTags()146	for k, v := range p.Tags {147		tags[k] = v148	}149	if state.Options.SystemTags.Has(metrics.TagURL) {150		tags["url"] = fmt.Sprintf("%s%s", c.addr, method)151	}152	parts := strings.Split(method[1:], "/")153	if state.Options.SystemTags.Has(metrics.TagService) {154		tags["service"] = parts[0]155	}156	if state.Options.SystemTags.Has(metrics.TagMethod) {157		tags["method"] = parts[1]158	}159	// Only set the name system tag if the user didn't explicitly set it beforehand160	if _, ok := tags["name"]; !ok && state.Options.SystemTags.Has(metrics.TagName) {161		tags["name"] = method162	}163	reqmsg := grpcext.Request{164		MethodDescriptor: methodDesc,165		Message:          b,166		Tags:             tags,167	}168	return c.conn.Invoke(ctx, method, md, reqmsg)169}170// Close will close the client gRPC connection171func (c *Client) Close() error {172	if c.conn == nil {173		return nil174	}175	err := c.conn.Close()176	c.conn = nil177	return err178}179// MethodInfo holds information on any parsed method descriptors that can be used by the goja VM180type MethodInfo struct {181	Package         string182	Service         string183	FullMethod      string184	grpc.MethodInfo `json:"-" js:"-"`185}186func (c *Client) convertToMethodInfo(fdset *descriptorpb.FileDescriptorSet) ([]MethodInfo, error) {187	files, err := protodesc.NewFiles(fdset)188	if err != nil {189		return nil, err190	}191	var rtn []MethodInfo192	if c.mds == nil {193		// This allows us to call load() multiple times, without overwriting the194		// previously loaded definitions.195		c.mds = make(map[string]protoreflect.MethodDescriptor)196	}197	appendMethodInfo := func(198		fd protoreflect.FileDescriptor,199		sd protoreflect.ServiceDescriptor,200		md protoreflect.MethodDescriptor,201	) {202		name := fmt.Sprintf("/%s/%s", sd.FullName(), md.Name())203		c.mds[name] = md204		rtn = append(rtn, MethodInfo{205			MethodInfo: grpc.MethodInfo{206				Name:           string(md.Name()),207				IsClientStream: md.IsStreamingClient(),208				IsServerStream: md.IsStreamingServer(),209			},210			Package:    string(fd.Package()),211			Service:    string(sd.Name()),212			FullMethod: name,213		})214	}215	files.RangeFiles(func(fd protoreflect.FileDescriptor) bool {216		sds := fd.Services()217		for i := 0; i < sds.Len(); i++ {218			sd := sds.Get(i)219			mds := sd.Methods()220			for j := 0; j < mds.Len(); j++ {221				md := mds.Get(j)222				appendMethodInfo(fd, sd, md)223			}224		}225		return true226	})227	return rtn, nil228}229type params struct {230	Metadata map[string]string231	Tags     map[string]string232	Timeout  time.Duration233}234func (c *Client) parseParams(raw map[string]interface{}) (params, error) {235	p := params{236		Timeout: 1 * time.Minute,237	}238	for k, v := range raw {239		switch k {240		case "headers":241			c.vu.State().Logger.Warn("The headers property is deprecated, replace it with the metadata property, please.")242			fallthrough243		case "metadata":244			p.Metadata = make(map[string]string)245			rawHeaders, ok := v.(map[string]interface{})246			if !ok {247				return p, errors.New("metadata must be an object with key-value pairs")248			}249			for hk, kv := range rawHeaders {250				// TODO(rogchap): Should we manage a string slice?251				strval, ok := kv.(string)252				if !ok {253					return p, fmt.Errorf("metadata %q value must be a string", hk)254				}255				p.Metadata[hk] = strval256			}257		case "tags":258			p.Tags = make(map[string]string)259			rawTags, ok := v.(map[string]interface{})260			if !ok {261				return p, errors.New("tags must be an object with key-value pairs")262			}263			for tk, tv := range rawTags {264				strVal, ok := tv.(string)265				if !ok {266					return p, fmt.Errorf("tag %q value must be a string", tk)267				}268				p.Tags[tk] = strVal269			}270		case "timeout":271			var err error272			p.Timeout, err = types.GetDurationValue(v)273			if err != nil {274				return p, fmt.Errorf("invalid timeout value: %w", err)275			}276		default:277			return p, fmt.Errorf("unknown param: %q", k)278		}279	}280	return p, nil281}282type connectParams struct {283	IsPlaintext           bool284	UseReflectionProtocol bool285	Timeout               time.Duration286}287func (c *Client) parseConnectParams(raw map[string]interface{}) (connectParams, error) {288	params := connectParams{289		IsPlaintext:           false,290		UseReflectionProtocol: false,291		Timeout:               time.Minute,292	}293	for k, v := range raw {294		switch k {295		case "plaintext":296			var ok bool297			params.IsPlaintext, ok = v.(bool)298			if !ok {299				return params, fmt.Errorf("invalid plaintext value: '%#v', it needs to be boolean", v)300			}301		case "timeout":302			var err error303			params.Timeout, err = types.GetDurationValue(v)304			if err != nil {305				return params, fmt.Errorf("invalid timeout value: %w", err)306			}307		case "reflect":308			var ok bool309			params.UseReflectionProtocol, ok = v.(bool)310			if !ok {311				return params, fmt.Errorf("invalid reflect value: '%#v', it needs to be boolean", v)312			}313		default:314			return params, fmt.Errorf("unknown connect param: %q", k)315		}316	}317	return params, nil318}319func walkFileDescriptors(seen map[string]struct{}, fd *desc.FileDescriptor) []*descriptorpb.FileDescriptorProto {320	fds := []*descriptorpb.FileDescriptorProto{}321	if _, ok := seen[fd.GetName()]; ok {322		return fds323	}...

chat.go

Source:chat.go

...70	}71	return conn.Invoke(ctx, method, nil, req)72}73func (mi *ModuleInstance) methodDescriptor(ctx context.Context, c *grpcext.Conn, method string) (protoreflect.MethodDescriptor, error) {74	rc, err := c.ReflectionClient()75	if err != nil {76		return nil, err77	}78	fdset, err := rc.Reflect(ctx)79	if err != nil {80		return nil, err81	}82	files, err := protodesc.NewFiles(fdset)83	if err != nil {84		return nil, err85	}86	var md protoreflect.MethodDescriptor87	files.RangeFiles(func(fd protoreflect.FileDescriptor) bool {88		sds := fd.Services()89		for i := 0; i < sds.Len(); i++ {90			sd := sds.Get(i)91			sdname := sd.FullName()92			mds := sd.Methods()...

Reflect

Using AI Code Generation

1import (2type reflectionServer struct {3}4func (s *reflectionServer) ServerReflectionInfo(stream reflection_grpc.ServerReflection_ServerReflectionInfoServer) error {5	grpclog.Info("ServerReflectionInfo")6	return grpc_reflection_v1alpha.ServerReflectionInfo(&reflectionServer{}, stream)7}8func main() {9	lis, err := net.Listen("tcp", "localhost:50051")10	if err != nil {11		log.Fatalf("failed to listen: %v", err)12	}13	s := grpc.NewServer()14	reflection_grpc.RegisterServerReflectionServer(s, &reflectionServer{})15	if err := s.Serve(lis); err != nil {16		log.Fatalf("failed to serve: %v", err)17	}18}19import (20func main() {21	conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure())22	if err != nil {23		log.Fatal(err)24	}25	defer conn.Close()26	client := reflection_grpc.NewServerReflectionClient(conn)27	stream, err := client.ServerReflectionInfo(context.Background())28	if err != nil {29		log.Fatal(err)30	}31	req := &reflection.ServerReflectionRequest{32		MessageRequest: &reflection.ServerReflectionRequest_ListServices{},33	}34	if err := stream.Send(req); err != nil {35		log.Fatal(err)36	}37	resp, err := stream.Recv()38	if err != nil {39		log.Fatal(err)40	}41	fmt.Println(resp)42}43&{&{[service:<name:"grpc.reflection.v1alpha.ServerReflection" > ]} []}

Reflect

Using AI Code Generation

1import (2type server struct {3}4func (s *server) SayHello(in *HelloRequest) (*HelloReply, error) {5	return &HelloReply{Message: "Hello " + in.Name}, nil6}7type config struct {8}9func (c *config) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {10}11func (c *config) HandleRPC(ctx context.Context, stat stats.RPCStats) {12}13func (c *config) TagConn(ctx context.Context, info *stats.ConnTagInfo) context.Context {14}15func (c *config) HandleConn(ctx context.Context, stat stats.ConnStats) {16}17func main() {18	lis, err := net.Listen("tcp", "localhost:50051")19	if err != nil {20		grpclog.Fatalf("failed to listen: %v", err)21	}22	s := grpc.NewServer(23		grpc.StatsHandler(&config{}),24	RegisterGreeterServer(s, &server{})25	reflection.Register(s)26	if err := s.Serve(lis); err != nil {27		grpclog.Fatalf("failed to serve: %v", err)28	}29}30import (31type server struct {32}33func (s *server) SayHello(in *HelloRequest) (*HelloReply, error) {34	return &HelloReply{Message: "Hello " + in.Name}, nil35}36type config struct {37}38func (c *config) TagRPC(ctx context.Context, info *stats.RP

Reflect

Using AI Code Generation

1import (2func main() {3    conn, err := grpc.Dial("localhost:8080", grpc.WithTransportCredentials(credentials.NewClientTLSFromCert(nil, "")))4    if err != nil {5        log.Fatal(err)6    }7    defer conn.Close()8    stub := grpc_testing.NewTestServiceClient(conn)9    req := &grpc_testing.SimpleRequest{10        ResponseSize: proto.Int32(100),11        FillUsername: proto.Bool(true),12        FillOauthScope: proto.Bool(true),13    }14    resp, err := stub.UnaryCall(grpcext.WithUserAgent(context.Background(), "grpc-go/1.0"), req)15    if err != nil {16        log.Fatal(err)17    }18    fmt.Println("Response: ", resp)19}20import (21func main() {22    conn, err := grpc.Dial("localhost:8080", grpc.WithTransportCredentials(credentials.NewClientTLSFromCert(nil, "")))23    if err != nil {24        log.Fatal(err)25    }26    defer conn.Close()27    stub := grpc_testing.NewTestServiceClient(conn)28    req := &grpc_testing.SimpleRequest{29        ResponseSize: proto.Int32(100),30        FillUsername: proto.Bool(true),31        FillOauthScope: proto.Bool(true),32    }33    resp, err := stub.UnaryCall(grpcext.WithUser

Reflect

Using AI Code Generation

1import (2func main() {3  conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure())4  if err != nil {5    grpclog.Fatalf("did not connect: %v", err)6  }7  defer conn.Close()8  c := pb.NewGreeterClient(conn)9  r, err := c.SayHello(context.Background(), &pb.HelloRequest{Name: name})10  if err != nil {11    grpclog.Fatalf("could not greet: %v", err)12  }13  grpclog.Printf("Greeting: %s", r.Message)14  method, ok := grpcext.MethodName(c.SayHello)15  if ok {16    grpclog.Printf("Method name: %s", method)17  } else {18    grpclog.Fatalf("Method name not available")19  }20}

Reflect

Using AI Code Generation

1func main() {2    var req interface{}3    var resp interface{}4    handler(ctx, req)5    method := grpcext.MethodName(info.FullMethod)6    log.Println(method)7}8func main() {9    var req interface{}10    var resp interface{}11    handler(ctx, req)12    method := grpcext.MethodName(info.FullMethod)13    log.Println(method)14}15func main() {16    var req interface{}17    var resp interface{}18    handler(ctx, req)19    method := grpcext.MethodName(info.FullMethod)20    log.Println(method)21}22func main() {23    var req interface{}24    var resp interface{}25    handler(ctx, req)26    method := grpcext.MethodName(info.FullMethod)27    log.Println(method)28}29func main() {30    var req interface{}31    var resp interface{}

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