Exemplo n.º 1
0
        // static void Main(string[] args)
        // {
        //     Console.WriteLine("Hello World!");
        // }

        static async Task Main(string[] args)
        {
            GrpcChannel channel = GrpcChannel.ForAddress(SERVER_ADDRESS);

            Greeter.GreeterClient client = new Greeter.GreeterClient(channel);
            HelloReply            reply  = await client.SayHelloAsync(new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("[GrpcGreeterClient][Main] => (reply.Message): " + (reply.Message));
            Console.WriteLine("Press any key to exit...");
            Console.Read();
        }
Exemplo n.º 2
0
        static async Task Main(string[] args)
        {
            using var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 3
0
        static async Task Main(string[] args)
        {
            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
            // The port number(5001) must match the port of the gRPC server.
            var channel = GrpcChannel.ForAddress("http://localhost:5000");
            var client  = new Greeter.GreeterClient(channel);
            var reply   = await client.SayMyNameAsync(new HelloRequest { Name = "Jose", Middlename = "P.", Lastname = "Longhi" });

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 4
0
        static async Task Main(string[] args)
        {
            // The port number(5001) must match the port of the gRPC server.
            using var channel = GrpcChannel.ForAddress("https://localhost:5001"); // Initiate a GrpcChannel containing the information for creating the connection to the gRPC service
            var client = new Greeter.GreeterClient(channel);                      // Using the GrpcChannel to construct the Greeter client
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });                     // call the asynchronous remote process, `HelloRequest`.

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 5
0
        static async Task Main(string[] args)
        {
            // The port number(5001) must match the port of the gRPC server.
            var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client  = new Greeter.GreeterClient(channel);
            var reply   = await client.SayHelloAsync(
                new HelloRequest { Name = "World" });

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 6
0
        static async Task Main(string[] args)
        {
            // The port number(5001) must match the port of the gRPC server.
            var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client  = new Greeter.GreeterClient(channel);

            Boolean isexit = true;

            while (isexit)
            {
                Console.WriteLine("Enter Your Name to send request to the server : ");
                String myName = Console.ReadLine();

                var reply = await client.SayHelloAsync(
                    new HelloRequest { Name = myName });

                Console.WriteLine("Hello world : " + reply.Message);


                Console.WriteLine("Enter YourFriend  Name  : ");
                String friendName = Console.ReadLine();

                var serverreply = await client.ServerMessageAsync(
                    new HelloRequest { Name = friendName });

                Console.WriteLine("Message from Server -> " + serverreply.Message);


                Console.WriteLine("Do you want to continue say Y or N");
                string YN = Console.ReadLine();
                if (YN.ToLower() == "y")
                {
                    isexit = true;
                }
                else
                {
                    isexit = false;
                }
                Console.WriteLine("==========================  ============");
                Console.WriteLine("");
            }

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();


            //var reply = await client.SayHelloAsync(
            //                  new HelloRequest { Name = "GreeterClient" });
            //Console.WriteLine("Greeting: " + reply.Message);
            //Console.WriteLine("Press any key to exit...");
            //Console.ReadKey();
        }
Exemplo n.º 7
0
        static async Task Main(string[] args)
        {
            using var grpc = GrpcChannel.ForAddress("https://localhost:5001");
            var client  = new Greeter.GreeterClient(grpc);
            var request = new HelloRequest {
                Name = "Everybody!"
            };
            var response = await client.SayHelloAsync(request);

            Console.WriteLine(response.Message);
            Console.WriteLine("Press a key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 8
0
        static async Task Main(string[] args)
        {
            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);

            using var channel = GrpcChannel.ForAddress("http://localhost:5000"); // dropped SSL due to MacOS issues: https://docs.microsoft.com/ro-ro/aspnet/core/grpc/troubleshoot?view=aspnetcore-3.1#unable-to-start-aspnet-core-grpc-app-on-macos
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 9
0
        static async Task Run()
        {
            // https://docs.microsoft.com/en-us/aspnet/core/grpc/troubleshoot?view=aspnetcore-3.1#call-insecure-grpc-services-with-net-core-client
            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);

            using var channel = GrpcChannel.ForAddress("http://localhost:5000");
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 10
0
        // 为什么每次调用创建一个channel会有很大的性能损失
        // 因为每次调用都需要在客户端和服务端之间进行多次网络往返,以创建一个新的HTTP/2连接,主要开销如下:
        // 1:打开一个socket 2:建立TCP连接 3:TLS握手 4:开始HTTP/2连接 5:开始Grpc调用
        // 创建的client是轻量级的,不需要被缓存和重用
        // 一个channel可以创建多个不同类型的client
        // channel创建的client是线程安全的
        // channel创建的client可以同时多次调用
        static async Task Main(string[] args)
        {
            var channel = GrpcChannel.ForAddress("https://localhost:5001");
            // 下面创建一个已经授权的channl,那么经它生成的client就不要再一遍遍写授权代码了。
            var authenticatedChannel = CreateAuthenticatedAChannel("https://localhost:5001");
            var authenticatedClient  = new Greeter.GreeterClient(authenticatedChannel);

            var client = new Greeter.GreeterClient(channel);
            // 方式1
            var reply = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" }
                );


            //var payload = new PayloadResponse();
            var status = new GrpcDemo.Status();

            status.Detail = Any.Pack(new HelloRequest()
            {
                Name = "marsonshine"
            });
            if (status.Detail.Is(HelloRequest.Descriptor))
            {
            }

            // oneof
            try
            {
                var oneofResult = await client.OneofReturnValueAsync(new Empty(), deadline : DateTime.UtcNow.AddSeconds(5));  // 还可以设置deadline,更有利于系统的伸缩性

                switch (oneofResult.ResultCase)
                {
                case ResponseMessage.ResultOneofCase.Person:
                    break;

                case ResponseMessage.ResultOneofCase.Error:
                    break;

                default:
                    break;
                }
            }
            catch (RpcException ex) when(ex.StatusCode == StatusCode.DeadlineExceeded)
            {
                Console.WriteLine("Timeout!");
            }
            Console.WriteLine("Greeting: " + reply.Message);

            Console.WriteLine("请按任意键结束...");
            Console.ReadKey();
        }
Exemplo n.º 11
0
        static async Task Main(string[] args)
        {
            // This switch must be set before creating the GrpcChannel/HttpClient.
            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
            // The port number(5001) must match the port of the gRPC server.
            using var channel = GrpcChannel.ForAddress("http://127.0.0.1:5000");
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 12
0
        static async Task Main(string[] args)
        {
            // This switch must be set before creating the GrpcChannel/HttpClient.
            AppContext.SetSwitch(
                "System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
            using var channel = GrpcChannel.ForAddress("http://localhost:5000");
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "Ola Mundo!" });

            Console.WriteLine(reply.Message);
            Console.WriteLine("Tem um canal bidirecional estabelecido aqui. Mas aperte qualquer tecla para sair.");
            Console.ReadKey();
        }
Exemplo n.º 13
0
        static async Task Main(string[] args)
        {
            var channel = GrpcChannel.ForAddress("https://localhost:5001", new GrpcChannelOptions
            {
                MaxReceiveMessageSize = 5 * 1024 * 1024, // 5 MB
                MaxSendMessageSize    = 2 * 1024 * 1024  // 2 MB
            });
            var client = new Greeter.GreeterClient(channel);

            var reply = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
        }
Exemplo n.º 14
0
        public static void Greeter()
        {
            //通道,成本高昂,建议重用(工厂集成:https://docs.microsoft.com/zh-cn/aspnet/core/grpc/clientfactory?view=aspnetcore-3.1)
            using var channel = GrpcChannel.ForAddress("https://localhost:5001");

            //客户端,成本低,无需重用
            var client = new Greeter.GreeterClient(channel);
            var reply  = client.SayHello(new HelloRequest()
            {
                Name = "GreeterClient"
            });

            Console.WriteLine("Greeting: " + reply.Message);
        }
Exemplo n.º 15
0
        static async Task Main(string[] args)
        {
            // The port number(50051) must match the port of the gRPC server.
            var channel = new Channel("localhost:50051",
                                      ChannelCredentials.Insecure);
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
            await channel.ShutdownAsync();

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 16
0
        static async Task Main(string[] args)
        {
            using var channel  =  GrpcChannel.ForAddress("https://localhost:5001");
            var client         =   new Greeter.GreeterClient(channel);
            var reply          =  await client.SayHelloAsync(
                new HelloRequest  {
                 Name  =   "GreeterClient"  
            });
                                          
            Console.WriteLine("Greeting: "   +  reply.Message);

            Console.WriteLine("Press any key to exit...");

            Console.ReadKey();
        }
Exemplo n.º 17
0
        static async Task Main(string[] args)
        {
            var channel = new Channel("localhost:5001", ChannelCredentials.Insecure, new[] {
                new ChannelOption(ChannelOptions.MaxSendMessageLength, 2 * 1024 * 1024),
                new ChannelOption(ChannelOptions.MaxReceiveMessageLength, 5 * 1024 * 1024)
            });
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
            await channel.ShutdownAsync();

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 18
0
        static async Task Main(string[] args)
        {
            var httpClientHandler = new HttpClientHandler();

            httpClientHandler.ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator;
            var httpClient = new HttpClient(httpClientHandler);
            var channel    = GrpcChannel.ForAddress("https://localhost:5001", new GrpcChannelOptions {
                HttpClient = httpClient
            });
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 19
0
        static async Task Main(string[] args)
        {
            var channel = GrpcChannel.ForAddress(Address, new GrpcChannelOptions()
            {
            });
            var options = new CallOptions()
                          .WithDeadline(DateTime.UtcNow.AddMinutes(1))
                          .WithWaitForReady(true);
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" }, options);

            try
            {
                var reply2 = await client.SayHelloAgainAsync(
                    new HelloRequest { Name = "GreeterClient" }, options);

                Console.WriteLine("Greeting: " + reply2.Message);
                Console.WriteLine("Press any key to exit...");
            }
            catch (RpcException e)
            {
                Console.WriteLine(e);
                // ouch!
                // lets print the gRPC error message
                // which is "Length of `Name` cannot be more than 10 characters"
                Console.WriteLine(e.Status.Detail);
                // lets access the error code, which is `INVALID_ARGUMENT`
                Console.WriteLine(e.Status.StatusCode);
                // Want its int version for some reason?
                // you shouldn't actually do this, but if you need for debugging,
                // you can access `e.Status.StatusCode` which will give you `3`
                Console.WriteLine((int)e.Status.StatusCode);
                // Want to take specific action based on specific error?
                if (e.Status.StatusCode == Grpc.Core.StatusCode.InvalidArgument)
                {
                    // do your thing
                }
            }


            await AddressBookkOperations(channel);

            Console.ReadKey();
        }
Exemplo n.º 20
0
        static async Task Main(string[] args)
        {
            // This is required
            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);

            string host;

            try {
                host = new Uri(args[0]).ToString();
            } catch (Exception) {
                host = "https://localhost:5001";
            }
            Console.WriteLine($"Connecting to gRPC provider on {host}");
            using (var channel = GrpcChannel.ForAddress(host)) {
                var client  = new Greeter.GreeterClient(channel);
                var request = new HelloRequest {
                    Name = "Test"
                };
                var reply = await client.SayHelloAsync(request);

                Console.WriteLine(reply);
                while (true)
                {
                    sw.Reset();
                    Console.WriteLine(String.Empty.PadLeft(72, '='));
                    Console.Write("Enter your name: ");

                    var name = Console.ReadLine();
                    if (bailouts.Contains(name))
                    {
                        return;
                    }

                    sw.Start();
                    request = new HelloRequest {
                        Name = name
                    };
                    reply = await client.SayHelloAsync(request);

                    sw.Stop();
                    Console.WriteLine(reply);
                    Console.WriteLine($"gRPC call took {sw.ElapsedMilliseconds} ms");
                }
            }
        }
Exemplo n.º 21
0
        static async Task Main(string[] args)
        {
            // The port number(5001) must match the port of the gRPC server.
            AppContext.SetSwitch(
                "System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
            var channel = GrpcChannel.ForAddress("http://localhost:5001");
            var client  = new Greeter.GreeterClient(channel);

            for (var i = 0; i < 10000; i++)
            {
                var reply = await client.SayHelloAsync(
                    new HelloRequest { Name = "GreeterClient" });

                // Console.WriteLine("Greeting: " + reply.Message);
            }
            // Console.WriteLine("Press any key to exit...");
            // Console.ReadKey();
        }
Exemplo n.º 22
0
        static async Task Main(string[] args)
        {
            Console.WriteLine("Start gRPC client...");

            // Call insecure gRPC services with .NET Core client, visit https://docs.microsoft.com/en-us/aspnet/core/grpc/troubleshoot?view=aspnetcore-3.1#call-insecure-grpc-services-with-net-core-client
            // This switch must be set before creating the GrpcChannel/HttpClient.
            AppContext.SetSwitch(
                "System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);

            // The port number(5001) must match the port of the gRPC server.
            using var channel = GrpcChannel.ForAddress("http://localhost:5000");
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 23
0
        static async Task Main(string[] args)
        {
            // The port number(5001) must match the port of the gRPC server.
            using var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client = new Greeter.GreeterClient(channel);
            var watch  = new Stopwatch();

            watch.Start();
            var reply = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" });

            watch.Stop();
            var responseTime = watch.ElapsedMilliseconds;

            Console.WriteLine("Greeting: " + reply.Message);
            Console.WriteLine("The reply lasted: " + responseTime + " ms");
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
        /// <summary>
        /// Main method
        /// </summary>
        /// <param name="args"></param>
        /// <returns></returns>
        static async Task Main(string[] args)
        {
            // The port number(5001) must match the port of the gRPC server.
            using var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client = new Greeter.GreeterClient(channel);

            try
            {
                var reply = await client.SayHelloAsync(
                    new HelloRequest { Name = "GrpcClient" });

                Console.WriteLine("Connected: " + reply.Message);
                Console.ReadKey();
            }
            catch (Exception error)
            {
                Console.WriteLine("Not connected: " + error.Message);
                Console.ReadKey();
            }
        }
Exemplo n.º 25
0
        static async Task Main(string[] args)
        {
            // The port number(5001) must match the port of the gRPC server.
            using var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client     = new Greeter.GreeterClient(channel);
            var postClient = new RemotePost.RemotePostClient(channel);
            //var reply = await client.SayHelloAsync(
            //new HelloRequest { Name = "GreeterClient" });
            var reply2 = await postClient.AddPostAsync(
                new PostModel
            {
                Id          = 1,
                Description = "Nimic",
                Domain      = "Altul",
                Date        = Timestamp.FromDateTime(DateTime.UtcNow)
            });

            Console.WriteLine("Result: " + reply2.Message);
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
        static async Task Main(string[] args)
        {
            var headers = new Metadata();

            headers.Add("Authorization", $"Bearer {_token}");
            // The port number(5001) must match the port of the gRPC server.
            using var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client = new Greeter.GreeterClient(channel);
            var reply  = await client.SayHelloAsync(
                new HelloRequest { Name = "GreeterClient" }, headers);

            Console.WriteLine("Greeting: " + reply.Message);

            var authenticatedChannel = CreateAuthenticatedChannel("https://localhost:5001");
            var authenticatedClient  = new Greeter.GreeterClient(authenticatedChannel);
            var response             = await authenticatedClient.SayHelloAsync(new HelloRequest { Name = "Greeter by Authenticated Client" });

            Console.WriteLine("Greeting: " + response.Message);

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }
Exemplo n.º 27
0
        static void Main(string[] args)
        {
            var channel = GrpcChannel.ForAddress("https://localhost:5001");
            var client  = new Greeter.GreeterClient(channel);
            var reply   = client.SayHello(new HelloRequest {
                Name = "GreeterClient"
            });

            Console.WriteLine("Greeting:" + reply.Message);
            string id;

            while ((id = Console.ReadLine()) != "3")
            {
                var empClient = new Employee.EmployeeClient(channel);
                var emp       = empClient.GetEmpInfo(new EmpRequest {
                    Id = Convert.ToInt32(id)
                });

                Console.WriteLine(emp);
            }

            Console.ReadKey();
        }
Exemplo n.º 28
0
        static void TestConcurrent()
        {
            Console.WriteLine($"{DateTime.Now} - Starting {nameof(TestConcurrent)} {TotalRequests} requests");

            var stopwatch = Stopwatch.StartNew();

            Parallel.For(0, TotalRequests, parallelOptions, (i) =>
            {
                if (LogDetails)
                {
                    Console.WriteLine($"{DateTime.Now} - Start request {i}");
                }
                using var channel = GrpcChannel.ForAddress("https://localhost:5001");
                var client        = new Greeter.GreeterClient(channel);
                var reply         = client.GetTime(new Empty());
                if (LogDetails)
                {
                    Console.WriteLine($"{DateTime.Now} - End request {i}: {reply}");
                }
            });
            stopwatch.Stop();

            Console.WriteLine($"{DateTime.Now} - {nameof(TestConcurrent)} for {TotalRequests} requests took: {stopwatch.ElapsedMilliseconds}ms");
        }
Exemplo n.º 29
0
        static void TestSequential()
        {
            Console.WriteLine($"{DateTime.Now} - Starting {nameof(TestSequential)} {TotalRequests} requests");

            var stopwatch = Stopwatch.StartNew();

            for (int i = 0; i < TotalRequests; i++)
            {
                if (LogDetails)
                {
                    Console.WriteLine($"{DateTime.Now} - Start request {i}");
                }
                using var channel = GrpcChannel.ForAddress("https://localhost:5001");
                var client = new Greeter.GreeterClient(channel);
                var reply  = client.GetTime(new Empty());
                if (LogDetails)
                {
                    Console.WriteLine($"{DateTime.Now} - End request {i}: {reply}");
                }
            }
            stopwatch.Stop();

            Console.WriteLine($"{DateTime.Now} - {nameof(TestSequential)} for {TotalRequests} requests took: {stopwatch.ElapsedMilliseconds}ms");
        }
Exemplo n.º 30
0
        static async Task Main(string[] args)
        {
            using var channel = CreateAuthenticatedChannel("https://localhost:5001");

            //using var channel = GrpcChannel.ForAddress("https://localhost:5001", new GrpcChannelOptions
            //{
            //    MaxSendMessageSize = 10 * 1024 * 1024,
            //    ThrowOperationCanceledOnCancellation = true
            //});

            _token = await Authenticate();

            var client = new  Greeter.GreeterClient(channel);

            try
            {
                var reply = await client.SayHelloAsync(new HelloRequest { Name = "GrpcGreeterClient" });

                Console.WriteLine("Greeting: " + reply.Message);
            }
            catch (RpcException ex) when(ex.StatusCode == StatusCode.DeadlineExceeded)
            {
                Console.WriteLine("Greeting timeout.");
            }


            // stream from service
            try
            {
                var tokenSource = new CancellationTokenSource();
                var call        = client.StreamingFromService(new ExampleRequest {
                    PageIndex = 1, PageSize = 10, IsDescending = false
                }, cancellationToken: tokenSource.Token);
                while (await call.ResponseStream.MoveNext())
                {
                    Console.WriteLine($"response age {call.ResponseStream.Current.Age}");
                    if (call.ResponseStream.Current.Age > 80)
                    {
                        tokenSource.Cancel();
                    }
                }
            }
            catch (OperationCanceledException ex)
            {
                Console.WriteLine($"request cancel by client {ex.Message}");
            }

            // stream from client
            var clientCall = client.StreamingFromClient();

            for (var i = 0; i < 5; i++)
            {
                await clientCall.RequestStream.WriteAsync(new ExampleRequest { PageIndex = i, PageSize = i, IsDescending = false });
            }

            // await clientCall.RequestStream.CompleteAsync();
            //var clientResponse = clientCall.GetTrailers();
            //Console.WriteLine($"client end meta data {clientResponse.GetValue("my-trailer-name")}");


            // both stream
            var bothstream = client.StreamingBothWays();

            Console.WriteLine($"Starting background task to receive messages");
            var readTask = Task.Run(async() =>
            {
                await foreach (var response in bothstream.ResponseStream.ReadAllAsync())
                {
                    Console.WriteLine($"response age {response.Age}");
                }
            });

            Console.WriteLine("Starting to send messages");
            Console.WriteLine("Type a message to echo then press enter.");
            while (true)
            {
                var result = Console.ReadLine();
                if (string.IsNullOrEmpty(result))
                {
                    break;
                }
                await bothstream.RequestStream.WriteAsync(new ExampleRequest { PageIndex = 100, PageSize = 200, IsDescending = true });
            }
            Console.WriteLine("Disconnecting");
            await bothstream.RequestStream.CompleteAsync();

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }