Wie zu verwenden IDispatchMessageInspector in einem WCF-Dienst?

Ich bin mit IClientMessageInspector für das gleiche Ziel.
Hier ist, wie Sie aus dem code:

 var serviceClient = new ServiceClientClass(binding, endpointAddress);
serviceClient.Endpoint.Behaviors.Add(
            new MessageInspectorEndpointBehavior<YourMessageInspectorType>());


///<summary>
///Represents a run-time behavior extension for a client endpoint.
///</summary>
public class MessageInspectorEndpointBehavior<T> : IEndpointBehavior
    where T: IClientMessageInspector, new()
{
    ///<summary>
    ///Implements a modification or extension of the client across an endpoint.
    ///</summary>
    ///<param name="endpoint">The endpoint that is to be customized.</param>
    ///<param name="clientRuntime">The client runtime to be customized.</param>
    public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
    {
        clientRuntime.MessageInspectors.Add(new T());
    }

    ///<summary>
    ///Implement to pass data at runtime to bindings to support custom behavior.
    ///</summary>
    ///<param name="endpoint">The endpoint to modify.</param>
    ///<param name="bindingParameters">The objects that binding elements require to support the behavior.</param>
    public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
    {
        //Nothing special here
    }

    ///<summary>
    ///Implements a modification or extension of the service across an endpoint.
    ///</summary>
    ///<param name="endpoint">The endpoint that exposes the contract.</param>
    ///<param name="endpointDispatcher">The endpoint dispatcher to be modified or extended.</param>
    public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
    {
        //Nothing special here
    }

    ///<summary>
    ///Implement to confirm that the endpoint meets some intended criteria.
    ///</summary>
    ///<param name="endpoint">The endpoint to validate.</param>
    public void Validate(ServiceEndpoint endpoint)
    {
        //Nothing special here
    }
}

Und hier ist die Beispiel-Implementierung von MessageInspector ich bin mit der Weitergabe der client-version zum server und abrufen der server-version im custom-Header:

///<summary>
///Represents a message inspector object that can be added to the <c>MessageInspectors</c> collection to view or modify messages.
///</summary>
public class VersionCheckMessageInspector : IClientMessageInspector
{
    ///<summary>
    ///Enables inspection or modification of a message before a request message is sent to a service.
    ///</summary>
    ///<param name="request">The message to be sent to the service.</param>
    ///<param name="channel">The WCF client object channel.</param>
    ///<returns>
    ///The object that is returned as the <paramref name="correlationState " /> argument of
    ///the <see cref="M:System.ServiceModel.Dispatcher.IClientMessageInspector.AfterReceiveReply(System.ServiceModel.Channels.Message@,System.Object)" /> method.
    ///This is null if no correlation state is used.The best practice is to make this a <see cref="T:System.Guid" /> to ensure that no two
    ///<paramref name="correlationState" /> objects are the same.
    ///</returns>
    public object BeforeSendRequest(ref Message request, IClientChannel channel)
    {
        request.Headers.Add(new VersionMessageHeader());
        return null;
    }

    ///<summary>
    ///Enables inspection or modification of a message after a reply message is received but prior to passing it back to the client application.
    ///</summary>
    ///<param name="reply">The message to be transformed into types and handed back to the client application.</param>
    ///<param name="correlationState">Correlation state data.</param>
    public void AfterReceiveReply(ref Message reply, object correlationState)
    {
        var serverVersion = string.Empty;
        var idx = reply.Headers.FindHeader(VersionMessageHeader.HeaderName, VersionMessageHeader.HeaderNamespace);
        if (idx >= 0)
        {
            var versionReader = reply.Headers.GetReaderAtHeader(idx);
            while (versionReader.Name != "ServerVersion"
                   && versionReader.Read())
            {
                serverVersion = versionReader.ReadInnerXml();
                break;
            }
        }

        ValidateServerVersion(serverVersion);
    }

    private static void ValidateServerVersion(string serverVersion)
    {
        //TODO...
    }
}

public class VersionMessageHeader : MessageHeader
{
    public const string HeaderName = "VersionSoapHeader";
    public const string HeaderNamespace = "<your namespace>";
    private const string VersionElementName = "ClientVersion";

    public override string Name
    {
        get { return HeaderName; }
    }

    public override string Namespace
    {
        get { return HeaderNamespace; }
    }

    protected override void OnWriteHeaderContents(XmlDictionaryWriter writer, MessageVersion messageVersion)
    {
        writer.WriteElementString(
            VersionElementName,
            Assembly.GetExecutingAssembly().GetName().Version.ToString());
    }
}

Was ich Tat, um Zugriff auf die details, die ich setzen Sie die folgenden in IDispatchMessageInspector.AfterReceiveRequest

Thread.CurrentPrincipal = new GenericPrincipal(new GenericIdentity(username, "Membership Provider"), roles);

Habe ich es unterlassen die Authentifizierung code aus diesem.

Zugriff auf den Wert aus der service-Methode, die Sie aufrufen können

Thread.CurrentPrincipal.Identity.Name