Adding a custom WCF header to the endpoint for reliable sessions

Question

I am creating a WCF router and my client is using trusted sessions. In this case, when the client opens the channel, a message is sent (creating a reliable session?). Its contents are as follows:

<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://docs.oasis-open.org/ws-rx/wsrm/200702/CreateSequence</a:Action>
    <a:MessageID>urn:uuid:1758f794-c5d3-4573-b252-7a07344cc257</a:MessageID>
    <a:To s:mustUnderstand="1">http://localhost:8010/RouterService</a:To>
  </s:Header>
  <s:Body>
    <CreateSequence xmlns="http://docs.oasis-open.org/ws-rx/wsrm/200702">
      <AcksTo>
        <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
      </AcksTo>
      <Offer>
        <Identifier>urn:uuid:64a12658-71d9-4967-88ec-9bb0610f7ecb</Identifier>
        <Endpoint>
          <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
        </Endpoint>
        <IncompleteSequenceBehavior>DiscardFollowingFirstGap</IncompleteSequenceBehavior>
      </Offer>
    </CreateSequence>
  </s:Body>
</s:Envelope>

The problem is that the headers do not contain any information that I can use to find which service the message is sent to. In the sample Busatmante router example, she bypasses this by adding a header to the endpoint:

  <client>
    <endpoint address="http://localhost:8010/RouterService" binding="ws2007HttpBinding"
      bindingConfiguration="wsHttp"
      contract="localhost.IMessageManagerService" >
      <headers>
        <Route xmlns="http://www.thatindigogirl.com/samples/2008/01" >http://www.thatindigogirl.com/samples/2008/01/IMessageManagerService</Route>
      </headers>
    </endpoint>
  </client>

When you open a trusted session, the message contains this custom header.

<Route a:IsReferenceParameter="true" xmlns="http://www.thatindigogirl.com/samples/2008/01">http://www.thatindigogirl.com/samples/2008/01/IMessageManagerService</Route>

; , . , ChannelFactory , . , . WCF, IClientMessageInspector, .

public class ContractNameMessageInspector : IClientMessageInspector {

    private const string HEADER_NAME = "ContractName";
    private readonly string _ContractName;

    public ContractNameMessageInspector(string contractName) {
        _ContractName = contractName;
    }

    #region IClientMessageInspector Members

    public void AfterReceiveReply(ref Message reply, object correlationState) { }

    public object BeforeSendRequest(ref Message request, IClientChannel channel) {

        HttpRequestMessageProperty httpRequestMessage;
        object httpRequestMessageObject;

        if (request.Properties.TryGetValue(HttpRequestMessageProperty.Name, out httpRequestMessageObject)) {
            httpRequestMessage = httpRequestMessageObject as HttpRequestMessageProperty;
            if (httpRequestMessage != null && string.IsNullOrEmpty(httpRequestMessage.Headers[HEADER_NAME])) {
                httpRequestMessage.Headers[HEADER_NAME] = this._ContractName;
            }
        }
        else {
            httpRequestMessage = new HttpRequestMessageProperty();
            httpRequestMessage.Headers.Add(HEADER_NAME, this._ContractName);
            request.Properties.Add(HttpRequestMessageProperty.Name, httpRequestMessage);
        }
        return null;
    }

    #endregion
}

, , , , , - .

, ; , ?

Answer 1

. EndpointAddress, .

_Binding = bindingFactory.GetBinding(serviceUri, typeof(T));
AddressHeader header = AddressHeader.CreateAddressHeader("ContractName", "NameSpace", typeof (T).ToString());

_Address = new EndpointAddress(serviceUri, header);
_ChannelFactory = new ChannelFactory<T>(_Binding, _Address);

, , , . , , , , , , WCF .

Answer 2

   public TResult Invoke<TResult>(Func<TClient, TResult> func,MessageHeader header)
    {
        TClient client = default(TClient);
        var sw = new Stopwatch();
        try
        {
            sw.Start();
            using (client = _channelFactory.CreateChannel())
            {
               using (OperationContextScope contextScope = new OperationContextScope(client))
                {
                    OperationContext.Current.OutgoingMessageHeaders.Add(header);

                    return func.Invoke(client);
                }
            }
        }
        finally
        {
            CloseConnection(client);
            Instrument(this.GetType().Name, sw);
        }
    }

Answer 3

, . MSDN , , :

var cl = new MyWCFClientContext();

var eab = new EndpointAddressBuilder(cl.Endpoint.Address);

eab.Headers.Add( AddressHeader.CreateAddressHeader("ClientIdentification", // Header Key
                                                    string.Empty,           // Namespace
                                                    "JabberwockyClient"));  // Header Value

cl.Endpoint.Address = eab.ToEndpointAddress();