在回调方向检查WCF消息？

Question

我可以分别使用IClientMessageInspector,IDispatchMessageInspector检查客户端和服务器端的WCF消息.但是在双工通信中,如何在从服务器到客户端的回调中做到这一点尚不清楚(关于该主题的文档也不多).

有关如何实现此功能的任何想法？

Answer 1

最后我得到了解决方案.

在双工通信方案中,当进行回调时,服务器成为客户端,反之亦然.

因此,在服务器端实现IServiceBehavior时,使用DispatchRuntime foreach EndpointDispatcher的CallbackClientRuntime属性注入消息检查器.

public void ApplyDispatchBehavior(ServiceDescription serviceDescription, System.ServiceModel.ServiceHostBase serviceHostBase)
{
    foreach (ChannelDispatcher item in serviceHostBase.ChannelDispatchers)
    {
        foreach (EndpointDispatcher epd in item.Endpoints)
        {
            //injecting an inspector in normal call
            epd.DispatchRuntime.MessageInspectors.Add(new MessageSizerInspector());

            //injecting an inspector in callback
            epd.DispatchRuntime.CallbackClientRuntime.MessageInspectors.Add(new MessageSizerInspector());
        }
    }
}

在客户端实现IEndpointBehavior时,使用CallbackDispatchRuntime注入消息检查器.

public void ApplyClientBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.ClientRuntime clientRuntime)
{
    //injecting an inspector in normal call
    clientRuntime.MessageInspectors.Add(new MessageSizerInspector());

    //injecting an inspector in callback
    clientRuntime.CallbackDispatchRuntime.MessageInspectors.Add(new MessageSizerInspector());       
}

然后一如既往地应用扩展名.

在我的例子中,我创建了一个类,如下面的伪代码

public class MessageSizer : Attribute, IServiceBehavior, IEndpointBehavior
{
    .....
}

然后我将此属性应用于服务器端检查的服务实现,并在app.config中添加了behaviorExtensions,以便在客户端设置端点以进行消息检查.

<system.serviceModel>
    ...........
    <client>
      <endpoint address="net.tcp://localhost/MinerDual.svc"
            binding="netTcpBinding" bindingConfiguration="wsDualMinerNetTcp"
            contract="WebApplication.IMinerDual" name="NetTcpMinerDual" 
            behaviorConfiguration="Default" />
    </client>
  <behaviors>
    <endpointBehaviors >
      <behavior name="Default">
        <messageSizer/>
      </behavior>
    </endpointBehaviors>
  </behaviors>
  <extensions>
    <behaviorExtensions>
      <add name="messageSizer"
           type="WCFExtensions.MessageSizerElement, WCFExtensions, 
           Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
    </behaviorExtensions>
  </extensions>
</system.serviceModel>