Trying to get a simple demo of NetTcpBinding working in order to expand it into another project.
Architecture: 2 console apps (1 host/server, 1 client) and 1 type library project. Both console apps have a reference to the type library project.
Host application:
class Program
{
static void Main()
{
var netTcpBinding = new NetTcpBinding(SecurityMode.None)
{
PortSharingEnabled = true
};
var netTcpAdddress = new Uri("net.tcp://127.0.0.1:1234/HelloWorldService/");
var tcpHost = new ServiceHost(typeof(HelloWorldService), netTcpAdddress);
tcpHost.AddServiceEndpoint(typeof(IHelloWorld), netTcpBinding, "IHelloWorld");
tcpHost.Open();
Console.WriteLine($"tcpHost is {tcpHost.State}. Press enter to close.");
Console.ReadLine();
tcpHost.Close();
}
}
public class HelloWorldService : IHelloWorld
{
public void HelloWorld()
{
Console.WriteLine("Hello World!");
}
public void WriteMe(string text)
{
Console.WriteLine($"WriteMe: {text}");
}
}
Client application:
static void Main()
{
Console.WriteLine("Press enter when the service is opened.");
Console.ReadLine();
var endPoint = new EndpointAddress("net.tcp://127.0.0.1:1234/HelloWorldService/");
var binding = new NetTcpBinding ();
var channel = new ChannelFactory<IHelloWorld>(binding, endPoint);
var client = channel.CreateChannel();
try
{
Console.WriteLine("Invoking HelloWorld on TcpService.");
client.HelloWorld();
Console.WriteLine("Successful.");
}
catch (Exception ex)
{
Console.WriteLine($"Exception: {ex.Message}");
}
Console.WriteLine("Press enter to quit.");
Console.ReadLine();
}
Type Library:
[ServiceContract]
public interface IHelloWorld
{
[OperationContract]
void HelloWorld();
[OperationContract]
void WriteMe(string text);
}
I believe I have all necessary services installed and running:
Obviously I'm trying to do all the config at runtime.
I consistently get this error message on the client:
Invoking HelloWorld on TcpService.
Exception: There was no endpoint listening at
net.tcp://127.0.0.1:1234/HelloWorldService/ that could accept the
message. This is often caused by an incorrect address or SOAP action.
See InnerException, if present, for more details. Press enter to quit.
Am I missing something obvious?
Your service is exposing the endpoint at address:
net.tcp://127.0.0.1:1234/HelloWorldService/IHelloWorld
but your client is connecting to:
net.tcp://127.0.0.1:1234/HelloWorldService/
You'll also need to set the client NetTcpBinding SecurityMode the same as the server (None).
Related
What is the problem: System.TimeoutException: 'The request channel timed out while waiting for a reply after 00:00:59.977913. So, basically it can be everything.
What do I have:
I create a simple solution to found a fix. What really make me confused is that console app works just fine, however wpf app with same configuration does not work. Solution include four projects(code made for debugging purpose, please don't judge it):
library with contracts and their implementation.
public class DeviceService : IDeviceService
{
public string GetDevices()
{
return "hello world";
}
}
[ServiceContract]
public interface IDeviceService
{
[OperationContract]
string GetDevices();
}
library with host.
public class DeviceServiceHostFactory
{
ServiceHost host;
public DeviceServiceHostFactory()
{
ServiceMetadataBehavior metadataBehavior;
BasicHttpBinding binding = new BasicHttpBinding();
Uri address = new Uri("http://localhost:4000/");
host = new ServiceHost(typeof(DeviceService), address);
Type contract = typeof(IDeviceService);
host.AddServiceEndpoint(contract, binding, "");
}
public void Start()
{
host.Open();
}
public void Stop()
{
host.Close();
}
}
desktop app that start service and consume it (does not work)
public partial class MainWindow : Window
{
private DeviceServiceHostFactory _deviceService;
public MainWindow()
{
InitializeComponent();
try
{
_deviceService = new DeviceServiceHostFactory();
_deviceService.Start();
}
catch (Exception ex)
{
_deviceService.Stop();
Console.WriteLine(ex.StackTrace);
}
}
private void Btn_custom_Click(object sender, RoutedEventArgs e)
{
BasicHttpBinding binding = new BasicHttpBinding();
EndpointAddress endpoint =
new EndpointAddress("http://localhost:4000/");
var factory =
new ChannelFactory<IDeviceService>(
binding, endpoint);
var channel = factory.CreateChannel();
txt_custom.Text = channel.GetDevices();
Console.WriteLine();
}
}
[ServiceContract]
public interface IDeviceService
{
[OperationContract]
string GetDevices();
}
console app (works fine)
class Program
{
static void Main(string[] args)
{
DeviceServiceHostFactory _deviceService = new
DeviceServiceHostFactory();
try
{
_deviceService.Start();
BasicHttpBinding binding = new BasicHttpBinding();
EndpointAddress endpoint =
new EndpointAddress("http://localhost:4000/");
var factory =
new ChannelFactory<IDeviceService>(
binding, endpoint);
var channel = factory.CreateChannel();
Console.WriteLine(channel.GetDevices());
Console.ReadLine();
}
catch (Exception ex)
{
_deviceService.Stop();
Console.WriteLine(ex.StackTrace);
}
}
}
[ServiceContract]
public interface IDeviceService
{
[OperationContract]
string GetDevices();
}
I really spend a lot of time for this, and I will be very grateful for every solution or thought how can I debug it more advanced.
Hosting wcf service in application with UI is little bit tricky, so I hope this will help someone.
Took it from book Learning WCF: A hands-On Guide By Michele Leroux Bustamante, Chapter 4, so fo more information please find this book.
To host service in Windows application or WPF application, we have to create a new thread to start it in a new synchronization context. It can be done in two ways:
First, is to create service host before the UI thread created. Here service executes in a new synchronization contenxt before application starts.
static class Program
{
static void Main()
{
DeviceServiceHostFactory deviceService = new DeviceServiceHostFactory();
deviceService.Start();
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new MainWindow);
}
}
Second, is to initialize service host on a separate thread, after UI been created
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
Thread thread;
thread = new Thread(ServiceInitialize);
thread.IsBackground = true;
thread.Start();
}
private void ServiceInitialize()
{
var service = new DeviceServiceHostFactory();
service.Start();
}
}
This means the messages are processed on threads form the thread pool instead of through the message loop.
First, we should give the current account permissions when we occupy the Operation system ports to host services.
This function could be accomplished by the below command.
Netsh http add urlacl url=https://+:80/MyUri user=DOMAIN\user
https://learn.microsoft.com/en-us/windows/win32/http/add-urlacl
If we don’t want to do this, we could directly run the service with administrator accounts.
Thereby I suspect there is something wrong with the process of hosting the service. Have you tried running the WPF application with an administrator account?
Besides, I suggest you add a namespace in the service contract.
[ServiceContract(Namespace ="MyNamespace")]
public interface IDeviceService
{
[OperationContract]
string GetDevices();
}
Sometimes, it could run into problems when the service contract doesn’t have a namespace property.
Feel free to let me know if the problem still exists.
Is there a small example of a console or winform app using signalR to send a message to a .net hub?. I have tried the .net examples and have looked at the wiki but it is not making sense to me the relationship between the hub(.net) and client(console app) (could not find an example of this). Does the app just need the address and name of hub to connect?.
If someone could provide a small tidbit of code showing the app connecting to a hub and sending "Hello World" or something that the .net hub receives?.
PS. I have a standard hub chat example which works well , if I try to assign a hub name in Cs to it , it stops working i.e [HubName("test")] , do you know the reason for this?.
Thanks.
Current Console app Code.
static void Main(string[] args)
{
//Set connection
var connection = new HubConnection("http://localhost:41627/");
//Make proxy to hub based on hub name on server
var myHub = connection.CreateProxy("chat");
//Start connection
connection.Start().ContinueWith(task =>
{
if (task.IsFaulted)
{
Console.WriteLine("There was an error opening the connection:{0}", task.Exception.GetBaseException());
}
else
{
Console.WriteLine("Connected");
}
}).Wait();
//connection.StateChanged += connection_StateChanged;
myHub.Invoke("Send", "HELLO World ").ContinueWith(task => {
if(task.IsFaulted)
{
Console.WriteLine("There was an error calling send: {0}",task.Exception.GetBaseException());
}
else
{
Console.WriteLine("Send Complete.");
}
});
}
Hub Server. (different project workspace)
public class Chat : Hub
{
public void Send(string message)
{
// Call the addMessage method on all clients
Clients.addMessage(message);
}
}
Info Wiki for this is http://www.asp.net/signalr/overview/signalr-20/hubs-api/hubs-api-guide-net-client
First of all, you should install SignalR.Host.Self on the server application and SignalR.Client on your client application by nuget :
PM> Install-Package SignalR.Hosting.Self -Version 0.5.2
PM> Install-Package Microsoft.AspNet.SignalR.Client
Then add the following code to your projects ;)
(run the projects as administrator)
Server console app:
using System;
using SignalR.Hubs;
namespace SignalR.Hosting.Self.Samples {
class Program {
static void Main(string[] args) {
string url = "http://127.0.0.1:8088/";
var server = new Server(url);
// Map the default hub url (/signalr)
server.MapHubs();
// Start the server
server.Start();
Console.WriteLine("Server running on {0}", url);
// Keep going until somebody hits 'x'
while (true) {
ConsoleKeyInfo ki = Console.ReadKey(true);
if (ki.Key == ConsoleKey.X) {
break;
}
}
}
[HubName("CustomHub")]
public class MyHub : Hub {
public string Send(string message) {
return message;
}
public void DoSomething(string param) {
Clients.addMessage(param);
}
}
}
}
Client console app:
using System;
using SignalR.Client.Hubs;
namespace SignalRConsoleApp {
internal class Program {
private static void Main(string[] args) {
//Set connection
var connection = new HubConnection("http://127.0.0.1:8088/");
//Make proxy to hub based on hub name on server
var myHub = connection.CreateHubProxy("CustomHub");
//Start connection
connection.Start().ContinueWith(task => {
if (task.IsFaulted) {
Console.WriteLine("There was an error opening the connection:{0}",
task.Exception.GetBaseException());
} else {
Console.WriteLine("Connected");
}
}).Wait();
myHub.Invoke<string>("Send", "HELLO World ").ContinueWith(task => {
if (task.IsFaulted) {
Console.WriteLine("There was an error calling send: {0}",
task.Exception.GetBaseException());
} else {
Console.WriteLine(task.Result);
}
});
myHub.On<string>("addMessage", param => {
Console.WriteLine(param);
});
myHub.Invoke<string>("DoSomething", "I'm doing something!!!").Wait();
Console.Read();
connection.Stop();
}
}
}
Example for SignalR 2.2.1 (May 2017)
Server
Install-Package Microsoft.AspNet.SignalR.SelfHost -Version 2.2.1
[assembly: OwinStartup(typeof(Program.Startup))]
namespace ConsoleApplication116_SignalRServer
{
class Program
{
static IDisposable SignalR;
static void Main(string[] args)
{
string url = "http://127.0.0.1:8088";
SignalR = WebApp.Start(url);
Console.ReadKey();
}
public class Startup
{
public void Configuration(IAppBuilder app)
{
app.UseCors(CorsOptions.AllowAll);
/* CAMEL CASE & JSON DATE FORMATTING
use SignalRContractResolver from
https://stackoverflow.com/questions/30005575/signalr-use-camel-case
var settings = new JsonSerializerSettings()
{
DateFormatHandling = DateFormatHandling.IsoDateFormat,
DateTimeZoneHandling = DateTimeZoneHandling.Utc
};
settings.ContractResolver = new SignalRContractResolver();
var serializer = JsonSerializer.Create(settings);
GlobalHost.DependencyResolver.Register(typeof(JsonSerializer), () => serializer);
*/
app.MapSignalR();
}
}
[HubName("MyHub")]
public class MyHub : Hub
{
public void Send(string name, string message)
{
Clients.All.addMessage(name, message);
}
}
}
}
Client
(almost the same as Mehrdad Bahrainy reply)
Install-Package Microsoft.AspNet.SignalR.Client -Version 2.2.1
namespace ConsoleApplication116_SignalRClient
{
class Program
{
private static void Main(string[] args)
{
var connection = new HubConnection("http://127.0.0.1:8088/");
var myHub = connection.CreateHubProxy("MyHub");
Console.WriteLine("Enter your name");
string name = Console.ReadLine();
connection.Start().ContinueWith(task => {
if (task.IsFaulted)
{
Console.WriteLine("There was an error opening the connection:{0}", task.Exception.GetBaseException());
}
else
{
Console.WriteLine("Connected");
myHub.On<string, string>("addMessage", (s1, s2) => {
Console.WriteLine(s1 + ": " + s2);
});
while (true)
{
Console.WriteLine("Please Enter Message");
string message = Console.ReadLine();
if (string.IsNullOrEmpty(message))
{
break;
}
myHub.Invoke<string>("Send", name, message).ContinueWith(task1 => {
if (task1.IsFaulted)
{
Console.WriteLine("There was an error calling send: {0}", task1.Exception.GetBaseException());
}
else
{
Console.WriteLine(task1.Result);
}
});
}
}
}).Wait();
Console.Read();
connection.Stop();
}
}
}
To build on #dyslexicanaboko's answer for dotnet core, here is a client console application:
Create a helper class:
using System;
using Microsoft.AspNetCore.SignalR.Client;
namespace com.stackoverflow.SignalRClientConsoleApp
{
public class SignalRConnection
{
public async void Start()
{
var url = "http://signalr-server-url/hubname";
var connection = new HubConnectionBuilder()
.WithUrl(url)
.WithAutomaticReconnect()
.Build();
// receive a message from the hub
connection.On<string, string>("ReceiveMessage", (user, message) => OnReceiveMessage(user, message));
var t = connection.StartAsync();
t.Wait();
// send a message to the hub
await connection.InvokeAsync("SendMessage", "ConsoleApp", "Message from the console app");
}
private void OnReceiveMessage(string user, string message)
{
Console.WriteLine($"{user}: {message}");
}
}
}
Then implement in your console app's entry point:
using System;
namespace com.stackoverflow.SignalRClientConsoleApp
{
class Program
{
static void Main(string[] args)
{
var signalRConnection = new SignalRConnection();
signalRConnection.Start();
Console.Read();
}
}
}
The Self-Host now uses Owin. Checkout http://www.asp.net/signalr/overview/signalr-20/getting-started-with-signalr-20/tutorial-signalr-20-self-host to setup the server. It's compatible with the client code above.
This is for dot net core 2.1 - after a lot of trial and error I finally got this to work flawlessly:
var url = "Hub URL goes here";
var connection = new HubConnectionBuilder()
.WithUrl($"{url}")
.WithAutomaticReconnect() //I don't think this is totally required, but can't hurt either
.Build();
//Start the connection
var t = connection.StartAsync();
//Wait for the connection to complete
t.Wait();
//Make your call - but in this case don't wait for a response
//if your goal is to set it and forget it
await connection.InvokeAsync("SendMessage", "User-Server", "Message from the server");
This code is from your typical SignalR poor man's chat client. The problem that I and what seems like a lot of other people have run into is establishing a connection before attempting to send a message to the hub. This is critical, so it is important to wait for the asynchronous task to complete - which means we are making it synchronous by waiting for the task to complete.
Additional information: The request has timed out after 00:00:00 milliseconds. The successful completion of the request cannot be determined. Additional queries should be made to determine whether or not the operation has succeeded.
I'm following the tutorial at https://msdn.microsoft.com/en-us/library/azure/ee706736.aspx and I'm getting the above exception after running the console program and putting in my access information. I put the policy name and the access key and the namespace in the login details but it doesn't seem to work.
using System;
using System.ServiceModel;
using System.ServiceModel.Description;
using Microsoft.ServiceBus;
using Microsoft.ServiceBus.Description;
namespace Microsoft.ServiceBus.Samples
{
[ServiceContract(Name = "IEchoContract", Namespace = "http://samples.microsoft.com/ServiceModel/Relay/")]
public interface IEchoContract
{
[OperationContract]
String Echo(string text);
}
public interface IEchoChannel : IEchoContract, IClientChannel { };
[ServiceBehavior(Name = "EchoService", Namespace = "http://samples.microsoft.com/ServiceModel/Relay/")]
class EchoService : IEchoContract
{
public string Echo(string text)
{
Console.WriteLine("Echoing: {0}", text);
return text;
}
}
class Program
{
static void Main(string[] args)
{
ServiceBusEnvironment.SystemConnectivity.Mode = ConnectivityMode.AutoDetect;
Console.Write("Your Service Namespace: ");
string serviceNamespace = Console.ReadLine();
Console.Write("Your Issuer Name: ");
string issuerName = Console.ReadLine();
Console.Write("Your Issuer Secret: ");
string issuerSecret = Console.ReadLine();
// Create the credentials object for the endpoint.
TransportClientEndpointBehavior sharedSecretServiceBusCredential = new TransportClientEndpointBehavior();
sharedSecretServiceBusCredential.TokenProvider = TokenProvider.CreateSharedSecretTokenProvider(issuerName, issuerSecret);
// Create the service URI based on the service namespace.
Uri address = ServiceBusEnvironment.CreateServiceUri("sb", serviceNamespace, "EchoService");
// Create the service host reading the configuration.
ServiceHost host = new ServiceHost(typeof(EchoService), address);
// Create the ServiceRegistrySettings behavior for the endpoint.
IEndpointBehavior serviceRegistrySettings = new ServiceRegistrySettings(DiscoveryType.Public);
// Add the Service Bus credentials to all endpoints specified in configuration.
foreach (ServiceEndpoint endpoint in host.Description.Endpoints)
{
endpoint.Behaviors.Add(serviceRegistrySettings);
endpoint.Behaviors.Add(sharedSecretServiceBusCredential);
}
// Open the service.
host.Open();
Console.WriteLine("Service address: " + address);
Console.WriteLine("Press [Enter] to exit");
Console.ReadLine();
// Close the service.
host.Close();
}
}
}
This question already has answers here:
Run WCF ServiceHost with multiple contracts
(8 answers)
Closed 9 years ago.
Is it possible to host multiple service contracts in one WCF service? If so, how? I've been googling and some posts say you can do it (but not how) and others have said it's just not possible.
When I run the server, I get this error:
The contract name 'ConsoleAppWcfCommon.IBarService' could not be found
in the list of contracts implemented by the service
'ConsoleAppWcfServer.FooService'.
This is my server code:
static void Main(string[] args)
{
string serviceAddress = "net.tcp://localhost:8088/FooBarService";
// I'm stuck here as I have to pick *one* service
ServiceHost selfServiceHost = new ServiceHost(typeof(FooService));
// I can add both endpoints here, but this is what gives me the error.
selfServiceHost.AddServiceEndpoint(typeof(IFooService), new NetTcpBinding(), serviceAddress);
selfServiceHost.AddServiceEndpoint(typeof(IBarService), new NetTcpBinding(), serviceAddress);
selfServiceHost.Open();
Console.ReadLine();
selfServiceHost.Close();
}
And this is the client code:
static void Main(string[] args)
{
NetTcpBinding netTcpBinding = new NetTcpBinding();
EndpointAddress endpointAddress = new EndpointAddress("net.tcp://localhost:8088/FooBarService");
// Call IFooService
var channelFactoryFoo = new ChannelFactory<IFooService>(netTcpBinding, endpointAddress);
IFooService channelFoo = channelFactoryFoo.CreateChannel();
Debug.WriteLine(channelFoo.FooMethod1());
// Call IBarService
var channelFactoryBar = new ChannelFactory<IBarService>(netTcpBinding, endpointAddress);
IBarService channelBar = channelFactoryBar.CreateChannel();
Debug.WriteLine(channelBar.BarMethod1());
}
My goal is to let the client make a call to Foo (or Bar) and only see the methods available to each. In my real application, I have about 10 domain entities with about four operations on each. I'm trying not to have one interface with 40 methods in it. And I don't want to have to host 10 different WCF services to do this.
As marc_s pointed out, the answer was to have one service implementation class that implements both interfaces. Below is the full working code.
Server:
static void Main(string[] args)
{
string serviceAddress = "net.tcp://localhost:8088/FooBarService";
ServiceHost selfServiceHost = new ServiceHost(typeof(FooService));
// The endpoints need to share this binding.
var binding = new NetTcpBinding();
selfServiceHost.AddServiceEndpoint(typeof(IFooService), binding, serviceAddress);
selfServiceHost.AddServiceEndpoint(typeof(IBarService), binding, serviceAddress);
selfServiceHost.Open();
Console.WriteLine("The service is ready.");
Console.WriteLine("Press any key to terminate service.");
Console.WriteLine();
Console.ReadKey();
selfServiceHost.Close();
}
Client:
static void Main(string[] args)
{
NetTcpBinding netTcpBinding = new NetTcpBinding();
EndpointAddress endpointAddress = new EndpointAddress("net.tcp://localhost:8088/FooBarService");
// Call IFooService
var channelFactoryFoo = new ChannelFactory<IFooService>(netTcpBinding, endpointAddress);
IFooService channelFoo = channelFactoryFoo.CreateChannel();
Console.WriteLine(channelFoo.FooMethod1());
// Call IBarService
var channelFactoryBar = new ChannelFactory<IBarService>(netTcpBinding, endpointAddress);
IBarService channelBar = channelFactoryBar.CreateChannel();
Console.WriteLine(channelBar.BarMethod1());
Console.ReadKey();
}
Foo Contract:
[ServiceContract]
public interface IFooService
{
[OperationContract]
string FooMethod1();
[OperationContract]
string FooMethod2();
}
Bar Contract:
[ServiceContract]
public interface IBarService
{
[OperationContract]
string BarMethod1();
[OperationContract]
string BarMethod2();
}
Foo Service:
public class FooService : IFooService, IBarService
{
public string FooMethod1()
{
return "FooMethod1";
}
public string FooMethod2()
{
return "FooMethod2";
}
public string BarMethod1()
{
return "BarMethod1";
}
public string BarMethod2()
{
return "BarMethod2";
}
}
I have a basic Contracts project:
[ServiceContract]
public interface IEchoService
{
[OperationContract]
string GetUpper(string text);
[OperationContract]
string GetLower(string text);
}
Service project:
public class EchoService : IEchoService
{
public string GetUpper(string text)
{
return text.ToUpper();
}
public string GetLower(string text)
{
return text.ToLower();
}
}
Self host project:
class Program
{
static void Main(string[] args)
{
var container = new WindsorContainer();
container.AddFacility<WcfFacility>(f => f.CloseTimeout = TimeSpan.Zero);
container
.Register(
AllTypes
.FromThisAssembly()
.InSameNamespaceAs<IEchoService>()
.WithServiceDefaultInterfaces()
.Configure(c =>
c.Named(c.Implementation.Name)
.AsWcfService(
new DefaultServiceModel()
.AddEndpoints(WcfEndpoint
.BoundTo(new NetTcpBinding(SecurityMode.None))
.At(string.Format(
"net.tcp://localhost:10333/MyServices/{0}",
c.Implementation.Name)
)))));
Console.WriteLine("hosting...");
while (Console.ReadKey().Key != ConsoleKey.Q)
{
}
}
When I tried connecting to my service from my client, I get this error msg:
Could not connect to net.tcp://localhost:10333/MyServices/EchoService.
The connection attempt lasted for a time span of 00:00:02.0904037.
TCP error code 10061: No connection could be made because the target
machine actively refused it 127.0.0.1:10333.
So I checked netstat, and found out that my console service, while able to run, isn't even listening on port 10333. I have no other programs using that port, I have even changed to a few other port nubmers, but it just doesn't show up on netstat.
What could be wrong with my console service? or any configuration settings I might have missed out?