The following article explains how to build an simple WCF service with Azure Relay Service Bus: https://azure.microsoft.com/en-us/documentation/articles/service-bus-dotnet-how-to-use-relay/ The example shows the use with TCP Binding. I reproduced it and it works flawless. Now I want the same with webHttpRelayBinding but it does not work as expected. I split the code the service in a common dll, a WCFServiceWebRole project, and command line host (as alternative to web.config) and clients :
common dll with interface definition and settings file with bus key, namespace and protocol (tcp or http) namespace WCFRelayCommon { using System.ServiceModel; using System.ServiceModel.Web;
[ServiceContract(Namespace = "urn:ps")]
public interface IProblemSolver
{
[OperationContract
WebInvoke(UriTemplate = "/solver", Method = "POST",
RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped)]
int AddNumbers(int a, int b);
}
public interface IProblemSolverChannel : IProblemSolver, IClientChannel { }
public enum BusProtocol { tcp, http };
public class Utils
{
public static BusProtocol Protocol
{
get
{
BusProtocol mode;
if (!Enum.TryParse(AzureSettings.Default.Protocol, out mode))
{
throw new ArgumentException("wrong input, exiting");
}
return mode;
}
}
}
}
WCFServiceWebRole project. I first defined all service settings (behavior, biding) in the Web.config and thus should be self sufficient as is.
namespace WCFServiceWebRoleRelay
{
public class ProblemSolver : WCFRelayCommon.IProblemSolver
{
public int AddNumbers(int a, int b)
{
return a + b;
}
}
}
But I also defined an alternative host project with all settings by code, easier to debug. So just a command line project using the settings file. 2 implementations: either with NetTcpRelayBinding or with WebHttpRelayBinding. with secure transport.
namespace WCFRelayHost
{
class Program
{
static void Main(string[] args)
{
var transportClientEndpointBehavior = new TransportClientEndpointBehavior
{
TokenProvider = TokenProvider.CreateSharedAccessSignatureTokenProvider("RootManageSharedAccessKey", AzureSettings.Default.BusKey)
};
ServiceHost sh;
switch (Utils.Protocol)
{
case BusProtocol.http:
sh = CreateWebHost(AzureSettings.Default.BusNamespace, transportClientEndpointBehavior);
break;
case BusProtocol.tcp:
sh = CreateTcpBindingHost(AzureSettings.Default.BusNamespace, transportClientEndpointBehavior);
break;
default:
throw new Exception("wrong mode");
}
sh.Open();
Console.WriteLine("Press ENTER to close");
Console.ReadLine();
sh.Close();
}
static ServiceHost CreateTcpBindingHost(string busNamespace, TransportClientEndpointBehavior transportClientEndpointBehavior)
{
Uri tcpAddress = ServiceBusEnvironment.CreateServiceUri("sb", busNamespace, "solver");
ServiceHost sh = new ServiceHost(typeof(ProblemSolver));
var binding = new NetTcpRelayBinding(EndToEndSecurityMode.Transport, new RelayClientAuthenticationType());
return AddServiceEndpoint(sh, binding, tcpAddress, transportClientEndpointBehavior);
}
static ServiceHost CreateWebHost(string busNamespace, TransportClientEndpointBehavior transportClientEndpointBehavior)
{
// https://<namespace>.servicebus.windows.net/solver
Uri webAddress = ServiceBusEnvironment.CreateServiceUri("https", busNamespace, "solver");
var binding = new WebHttpRelayBinding(EndToEndWebHttpSecurityMode.Transport, new RelayClientAuthenticationType());
WebServiceHost wsh = new WebServiceHost(typeof(ProblemSolver), webAddress);
return AddServiceEndpoint(wsh, binding, webAddress, transportClientEndpointBehavior);
}
static ServiceHost AddServiceEndpoint(ServiceHost sh, Binding binding, Uri uri, TransportClientEndpointBehavior transportClientEndpointBehavior)
{
sh.AddServiceEndpoint(typeof(IProblemSolver), binding, uri).Behaviors.Add(transportClientEndpointBehavior);
return sh;
}
}
}
And the client command line app.
namespace WCFRelayClient
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter 2 numbers to add separated by space");
var line = Console.ReadLine();
var array = line.Split(' ');
int first, second;
if (!int.TryParse(array[0], out first) || !int.TryParse(array[1], out second))
{
Console.WriteLine("wrong input, exiting");
}
else
{
Console.WriteLine("Wait the host to run, press ENTER when ready to send the request");
Console.ReadLine();
var transportClientEndpointBehavior = new TransportClientEndpointBehavior
{
TokenProvider = TokenProvider.CreateSharedAccessSignatureTokenProvider("RootManageSharedAccessKey", AzureSettings.Default.BusKey)
};
IProblemSolverChannel ch;
switch (Utils.Protocol)
{
case BusProtocol.http:
ch = WebBinding(AzureSettings.Default.BusNamespace, transportClientEndpointBehavior);
break;
case BusProtocol.tcp:
ch = TcpBinding(AzureSettings.Default.BusNamespace, transportClientEndpointBehavior);
break;
default:
throw new Exception("wrong mode");
}
Console.WriteLine(ch.AddNumbers(first, second));
ch.Dispose();
}
Console.ReadLine();
}
static IProblemSolverChannel TcpBinding(string busNamespace, TransportClientEndpointBehavior transportClientEndpointBehavior)
{
var binding = new NetTcpRelayBinding(EndToEndSecurityMode.Transport, new RelayClientAuthenticationType());
var uri = ServiceBusEnvironment.CreateServiceUri("sb", busNamespace, "solver");
return CreateChannel(binding, uri, transportClientEndpointBehavior);
}
static IProblemSolverChannel WebBinding(string busNamespace, TransportClientEndpointBehavior transportClientEndpointBehavior)
{
var binding = new WebHttpRelayBinding(EndToEndWebHttpSecurityMode.Transport, new RelayClientAuthenticationType());
var uri = ServiceBusEnvironment.CreateServiceUri("https", busNamespace, "solver");
return CreateChannel(binding, uri, transportClientEndpointBehavior);
}
static IProblemSolverChannel CreateChannel(Binding binding, Uri uri, TransportClientEndpointBehavior transportClientEndpointBehavior)
{
var cf = new ChannelFactory<IProblemSolverChannel>(binding, new EndpointAddress(uri));
cf.Endpoint.Behaviors.Add(transportClientEndpointBehavior);
return cf.CreateChannel();
}
}
}
I just have to change the setting parameter to http or tcp to use either webHttpRelayBinding or netTcpRelayBiding
As said, with netTcpRelayBiding, the code run as expected.
With webHttpRelayBinding, I get a InvalidOperationException in mscorlib
System.InvalidOperationException was unhandled
HResult=-2146233079
Message=Manual addressing is enabled on this factory, so all messages sent must be pre-addressed.
Source=mscorlib
What did I miss? Maybe some configuration on the Azure Portal? I just followed the instructions from the tutorial...
