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How to use withTags method of grpcext Package

Best K6 code snippet using grpcext.withTags

conn.go

Source:conn.go

...94	reqdm := dynamicpb.NewMessage(req.MethodDescriptor.Input())95	if err := protojson.Unmarshal(req.Message, reqdm); err != nil {96		return nil, fmt.Errorf("unable to serialise request object to protocol buffer: %w", err)97	}98	ctx = withTags(ctx, req.Tags)99	resp := dynamicpb.NewMessage(req.MethodDescriptor.Output())100	header, trailer := metadata.New(nil), metadata.New(nil)101	copts := make([]grpc.CallOption, 0, len(opts)+2)102	copts = append(copts, opts...)103	copts = append(copts, grpc.Header(&header), grpc.Trailer(&trailer))104	err := c.raw.Invoke(ctx, url, reqdm, resp, copts...)105	response := Response{106		Headers:  header,107		Trailers: trailer,108	}109	marshaler := protojson.MarshalOptions{EmitUnpopulated: true}110	if err != nil {111		sterr := status.Convert(err)112		response.Status = sterr.Code()113		// (rogchap) when you access a JSON property in goja, you are actually accessing the underling114		// Go type (struct, map, slice etc); because these are dynamic messages the Unmarshaled JSON does115		// not map back to a "real" field or value (as a normal Go type would). If we don't marshal and then116		// unmarshal back to a map, you will get "undefined" when accessing JSON properties, even when117		// JSON.Stringify() shows the object to be correctly present.118		raw, _ := marshaler.Marshal(sterr.Proto())119		errMsg := make(map[string]interface{})120		_ = json.Unmarshal(raw, &errMsg)121		response.Error = errMsg122	}123	if resp != nil {124		// (rogchap) there is a lot of marshaling/unmarshaling here, but if we just pass the dynamic message125		// the default Marshaller would be used, which would strip any zero/default values from the JSON.126		// eg. given this message:127		// message Point {128		//    double x = 1;129		// 	  double y = 2;130		// 	  double z = 3;131		// }132		// and a value like this:133		// msg := Point{X: 6, Y: 4, Z: 0}134		// would result in JSON output:135		// {"x":6,"y":4}136		// rather than the desired:137		// {"x":6,"y":4,"z":0}138		raw, _ := marshaler.Marshal(resp)139		msg := make(map[string]interface{})140		_ = json.Unmarshal(raw, &msg)141		response.Message = msg142	}143	return &response, nil144}145// Close closes the underhood connection.146func (c *Conn) Close() error {147	return c.raw.Close()148}149type statsHandler struct {150	vu modules.VU151}152// TagConn implements the grpcstats.Handler interface153func (statsHandler) TagConn(ctx context.Context, _ *grpcstats.ConnTagInfo) context.Context { // noop154	return ctx155}156// HandleConn implements the grpcstats.Handler interface157func (statsHandler) HandleConn(context.Context, grpcstats.ConnStats) {158	// noop159}160// TagRPC implements the grpcstats.Handler interface161func (statsHandler) TagRPC(ctx context.Context, _ *grpcstats.RPCTagInfo) context.Context {162	// noop163	return ctx164}165// HandleRPC implements the grpcstats.Handler interface166func (h statsHandler) HandleRPC(ctx context.Context, stat grpcstats.RPCStats) {167	state := h.vu.State()168	tags := getTags(ctx)169	switch s := stat.(type) {170	case *grpcstats.OutHeader:171		if state.Options.SystemTags.Has(metrics.TagIP) && s.RemoteAddr != nil {172			if ip, _, err := net.SplitHostPort(s.RemoteAddr.String()); err == nil {173				tags["ip"] = ip174			}175		}176	case *grpcstats.End:177		if state.Options.SystemTags.Has(metrics.TagStatus) {178			tags["status"] = strconv.Itoa(int(status.Code(s.Error)))179		}180		mTags := map[string]string(tags)181		sampleTags := metrics.IntoSampleTags(&mTags)182		metrics.PushIfNotDone(ctx, state.Samples, metrics.ConnectedSamples{183			Samples: []metrics.Sample{184				{185					Metric: state.BuiltinMetrics.GRPCReqDuration,186					Tags:   sampleTags,187					Value:  metrics.D(s.EndTime.Sub(s.BeginTime)),188					Time:   s.EndTime,189				},190			},191		})192	}193	// (rogchap) Re-using --http-debug flag as gRPC is technically still HTTP194	if state.Options.HTTPDebug.String != "" {195		logger := state.Logger.WithField("source", "http-debug")196		httpDebugOption := state.Options.HTTPDebug.String197		DebugStat(logger, stat, httpDebugOption)198	}199}200// DebugStat prints debugging information based on RPCStats.201func DebugStat(logger logrus.FieldLogger, stat grpcstats.RPCStats, httpDebugOption string) {202	switch s := stat.(type) {203	case *grpcstats.OutHeader:204		logger.Infof("Out Header:\nFull Method: %s\nRemote Address: %s\n%s\n",205			s.FullMethod, s.RemoteAddr, formatMetadata(s.Header))206	case *grpcstats.OutTrailer:207		if len(s.Trailer) > 0 {208			logger.Infof("Out Trailer:\n%s\n", formatMetadata(s.Trailer))209		}210	case *grpcstats.OutPayload:211		if httpDebugOption == "full" {212			logger.Infof("Out Payload:\nWire Length: %d\nSent Time: %s\n%s\n\n",213				s.WireLength, s.SentTime, formatPayload(s.Payload))214		}215	case *grpcstats.InHeader:216		if len(s.Header) > 0 {217			logger.Infof("In Header:\nWire Length: %d\n%s\n", s.WireLength, formatMetadata(s.Header))218		}219	case *grpcstats.InTrailer:220		if len(s.Trailer) > 0 {221			logger.Infof("In Trailer:\nWire Length: %d\n%s\n", s.WireLength, formatMetadata(s.Trailer))222		}223	case *grpcstats.InPayload:224		if httpDebugOption == "full" {225			logger.Infof("In Payload:\nWire Length: %d\nReceived Time: %s\n%s\n\n",226				s.WireLength, s.RecvTime, formatPayload(s.Payload))227		}228	}229}230func formatMetadata(md metadata.MD) string {231	var sb strings.Builder232	for k, v := range md {233		sb.WriteString(k)234		sb.WriteString(": ")235		sb.WriteString(strings.Join(v, ", "))236		sb.WriteRune('\n')237	}238	return sb.String()239}240func formatPayload(payload interface{}) string {241	msg, ok := payload.(proto.Message)242	if !ok {243		// check to see if we are dealing with a APIv1 message244		msgV1, ok := payload.(protov1.Message)245		if !ok {246			return ""247		}248		msg = protov1.MessageV2(msgV1)249	}250	marshaler := prototext.MarshalOptions{251		Multiline: true,252		Indent:    "  ",253	}254	b, err := marshaler.Marshal(msg)255	if err != nil {256		return ""257	}258	return string(b)259}260type ctxKeyTags struct{}261type reqtags map[string]string262func withTags(ctx context.Context, tags reqtags) context.Context {263	if tags == nil {264		tags = make(map[string]string)265	}266	return context.WithValue(ctx, ctxKeyTags{}, tags)267}268func getTags(ctx context.Context) reqtags {269	v := ctx.Value(ctxKeyTags{})270	if v == nil {271		return make(map[string]string)272	}273	return v.(reqtags)274}...

withTags

Using AI Code Generation

1import (2func init() {3	lis = bufconn.Listen(bufSize)4	s := grpc.NewServer()5	grpc_testing.RegisterTestServiceServer(s, &testServer{})6	go func() {7		if err := s.Serve(lis); err != nil {8			log.Fatalf("Server exited with error: %v", err)9		}10	}()11}12func bufDialer(context.Context, string) (net.Conn, error) {13	return lis.Dial()14}15type testServer struct{}16func (s *testServer) EmptyCall(ctx context.Context, in *grpc_testing.Empty) (*grpc_testing.Empty, error) {17	return &grpc_testing.Empty{}, nil18}19func (s *testServer) UnaryCall(ctx context.Context, in *grpc_testing.SimpleRequest) (*grpc_testing.SimpleResponse, error) {20	return &grpc_testing.SimpleResponse{}, nil21}22func main() {23	ctx := context.Background()24	ctx, cancel := context.WithTimeout(ctx, time.Second)25	defer cancel()26	conn, err := grpc.DialContext(ctx, "bufnet", grpc.WithInsecure(), grpc.WithContextDialer(bufDialer))27	if err != nil {28		log.Fatalf("Failed to dial bufnet: %v", err)29	}30	defer conn.Close()31	client := grpc_testing.NewTestServiceClient(conn)32	_, err = client.EmptyCall(ctx, &grpc_testing.Empty{})33	if err != nil {34		log.Fatalf("EmptyCall failed: %v", err)35	}36	tags := make(map[string]string)

withTags

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	ctx, cancel := context.WithTimeout(ctx, time.Second)5	defer cancel()6	conn, err := grpc.DialContext(ctx, "localhost:50051", grpc.WithInsecure(), grpc.WithBlock())7	if err != nil {8		log.Fatal(err)9	}10	defer conn.Close()11	client := NewGreeterClient(conn)12	ctx = metadata.AppendToOutgoingContext(ctx, "x-user-id", "123")13	r, err := client.SayHello(ctx, &HelloRequest{Name: "world"})14	if err != nil {15		log.Fatal(err)16	}17	log.Println(r.Message)18}19import (20func main() {21	ctx := context.Background()22	ctx, cancel := context.WithTimeout(ctx, time.Second)23	defer cancel()24	conn, err := grpc.DialContext(ctx, "localhost:50051", grpc.WithInsecure(), grpc.WithBlock())25	if err != nil {26		log.Fatal(err)27	}28	defer conn.Close()29	client := NewGreeterClient(conn)30	ctx = metadata.AppendToOutgoingContext(ctx, "x-user-id", "123")31	r, err := client.SayHello(ctx, &HelloRequest{Name: "world"})32	if err != nil {33		log.Fatal(err)34	}35	log.Println(r.Message)36}37import (38func main() {39	ctx := context.Background()40	ctx, cancel := context.WithTimeout(ctx, time.Second)41	defer cancel()42	conn, err := grpc.DialContext(ctx, "localhost:50051", grpc.WithInsecure(), grpc.WithBlock())43	if err != nil {44		log.Fatal(err)45	}46	defer conn.Close()47	client := NewGreeterClient(conn)48	ctx = metadata.AppendToOutgoingContext(ctx, "x-user-id", "123")49	r, err := client.SayHello(ctx, &HelloRequest{Name: "world"})

withTags

Using AI Code Generation

1import (2func main() {3	lis, err := net.Listen("tcp", ":7777")4	if err != nil {5		log.Fatalf("failed to listen: %v", err)6	}7	s := grpc.NewServer()8	pb.RegisterPingServer(s, &server{})9	if err := s.Serve(lis); err != nil {10		log.Fatalf("failed to serve: %v", err)11	}12}13type server struct{}14func (s *server) Ping(ctx context.Context, in *pb.PingRequest) (*pb.PingResponse, error) {15	tag := grpcext.FromContext(ctx)16	fmt.Printf("Tag: %v17	return &pb.PingResponse{Message: "Pong"}, nil18}19import (20func main() {21	lis, err := net.Listen("tcp", ":7777")22	if err != nil {23		log.Fatalf("failed to listen: %v", err)24	}25	s := grpc.NewServer()26	pb.RegisterPingServer(s, &server{})27	if err := s.Serve(lis); err != nil {28		log.Fatalf("failed to serve: %v", err)29	}30}31type server struct{}

withTags

Using AI Code Generation

1func main() {2    conn, err := grpc.Dial("localhost:5000", grpc.WithInsecure())3    if err != nil {4        log.Fatalf("Failed to connect to server: %v", err)5    }6    defer conn.Close()7    client := grpcext.NewClient(conn)8    ctx, cancel := context.WithTimeout(context.Background(), time.Second)9    defer cancel()10    res, err := client.WithTags(ctx, &pb.HelloRequest{Name: "John"})11    if err != nil {12        log.Fatalf("Error calling service: %v", err)13    }14    log.Printf("Response: %s", res.Message)15    for k, v := range client.GetTags() {16        log.Printf("Tag: %s = %s", k, v)17    }18}19func main() {20    conn, err := grpc.Dial("localhost:5000", grpc.WithInsecure())21    if err != nil {22        log.Fatalf("Failed to connect to server: %v", err)23    }24    defer conn.Close()25    client := grpcext.NewClient(conn)26    ctx, cancel := context.WithTimeout(context.Background(), time.Second)27    defer cancel()28    res, err := client.WithTags(ctx, &pb.HelloRequest{Name: "John"})29    if err != nil {30        log.Fatalf("Error calling service: %v", err)31    }32    log.Printf("Response: %s", res.Message)33    for k, v := range client.GetTags() {34        log.Printf("Tag: %s = %s", k, v)35    }36}37func main() {38    conn, err := grpc.Dial("localhost:5000", grpc.WithInsecure())39    if err != nil {40        log.Fatalf("Failed to connect to server: %v", err)41    }42    defer conn.Close()

withTags

Using AI Code Generation

1import (2const (3type server struct{}4func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {5	grpcext.SetHeader(ctx, "custom-server-header-bin", []string{"server value"})6	grpcext.SetTrailer(ctx, "custom-server-trailer-bin", []string{"server value"})7	grpcext.SetTrailer(ctx, "custom-server-trailer-bin", []string{"server value2"})8	grpcext.SetTrailer(ctx, "custom-server-trailer-bin", []string{"server value3"})9	return &pb.HelloReply{Message: "Hello " + in.Name}, nil10}11func main() {12	lis, err := net.Listen("tcp", port)13	if err != nil {14		grpclog.Fatalf("failed to listen: %v", err)15	}16	s := grpc.NewServer()17	pb.RegisterGreeterServer(s, &server{})18	grpclog.Println("server listening at", lis.Addr())19	if err := s.Serve(lis); err != nil {20		grpclog.Fatalf("failed to serve: %v", err)21	}22}23import (24const (

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