WCF Custom behaviours

To add custom behavior to your calls to WCF services the way to go is with message inspectors

A behavior extension element HttpBlahBehaviorExtensionElement

Will be configured thus:

<client>

      <endpoint address="http://localhost/blah/blah.svc" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IReportingService" contract="IBlah" name="BasicHttpBinding_IBlah" behaviorConfiguration=" BlahServiceBehavior">

       </endpoint>

    </client>

<extensions>

      <behaviorExtensions>

        <add name="httpBlah" type="HttpBlahBehaviorExtensionElement” />

      </behaviorExtensions>

    </extensions>

    <behaviors>

      <endpointBehaviors>

        <behavior name="BlahServiceBehavior">

          < httpBlah />

        </behavior>

      </endpointBehaviors>

    </behaviors>

The code for HttpBlahBehaviorExtensionElement

namespace Blah.MessageInspectors

{

    public class HttpBlahBehaviorExtensionElement: BehaviorExtensionElement

    {

        public override Type BehaviorType

        {

            get

            {

                return typeof(HttpBlahEndpointBehavior);

            }

        }

        protected override object CreateBehavior()

        {

            return new HttpBlahEndpointBehavior();

        }

    }

}

This references the following behavior HttpBlahEndpointBehavior which implements IEndpointBehavior

 Code thus:

  public class HttpBlahEndpointBehavior: IEndpointBehavior

    {

        public HttpBlahEndpointBehavior ()

        {

        }

        #region IEndpointBehavior Members

        public void AddBindingParameters(ServiceEndpoint endpoint, System.ServiceModel.Channels.BindingParameterCollection bindingParameters)

        {

        }

        public void ApplyClientBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.ClientRuntime clientRuntime)

        {

  HttpBlahMessageInspector inspector = new       HttpBlahMessageInspector ();

            clientRuntime.MessageInspectors.Add(inspector);

        }

        public void ApplyDispatchBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.EndpointDispatcher endpointDispatcher)

        {

        }

        public void Validate(ServiceEndpoint endpoint)

        {

        }

        #endregion

    }

In this case we only care about applying a behavior in this case an inspector

Here is the HttpBlahMessageInspector which implements IClientMessageInspector

public class HttpBlahMessageInspector: IClientMessageInspector

    {

        #region IClientMessageInspector Members

        public void AfterReceiveReply(ref System.ServiceModel.Channels.Message reply, object correlationState)

        {

        }

        public object BeforeSendRequest(ref System.ServiceModel.Channels.Message request, System.ServiceModel.IClientChannel channel)

        {

             //do something

            return null;

        }

        #endregion

    }