wcf - 无法使 IDispatchMessageInspector 工作

Question

我需要在 REST、Json、WCF Web 服务中使用请求 header 。我创建了 IDispatchMessageInspector

public class HeaderInspector : IDispatchMessageInspector
{
    public object AfterReceiveRequest(ref System.ServiceModel.Channels.Message request, System.ServiceModel.IClientChannel channel, System.ServiceModel.InstanceContext instanceContext)
    {
        int ind = request.Headers.FindHeader("xxxxx", "");
        return null;
    }

    public void BeforeSendReply(ref System.ServiceModel.Channels.Message reply, object correlationState)
    {
    }
}

然后是一个端点行为，将检查器附加到端点:

public class HeaderInspectorBehavior : IEndpointBehavior
{
    public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
    {
    }

    public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
    {
    }

    public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
    {
        HeaderInspector headerinsp = new HeaderInspector();
        endpointDispatcher.DispatchRuntime.MessageInspectors.Add(new HeaderInspector());
    }

    public void Validate(ServiceEndpoint endpoint)
    {
    }
}

最后是BehaviorExtensionElement:

public class MyExtension : BehaviorExtensionElement
{
    public override Type BehaviorType
    {
        get { return typeof(HeaderInspectorBehavior); }
    }
    protected override object CreateBehavior()
    {
        return new HeaderInspectorBehavior();
    }
}

这些类位于同一文件/ namespace PDM.WebService 中我的配置是:

<behaviors>
  <endpointBehaviors>
    <behavior name="RestBehavior">
      <HeaderInspectorBehavior/>
      <webHttp helpEnabled="true" defaultOutgoingResponseFormat="Json" faultExceptionEnabled="true" automaticFormatSelectionEnabled="false" />
    </behavior>
  </endpointBehaviors>
</behaviors>
<extensions>
  <behaviorExtensions>
    <add name="HeaderInspectorBehavior" type="PDM.WebService.MyExtension, PDM.WebService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
  </behaviorExtensions>
</extensions>

一切都编译良好，在执行时我可以捕获方法“public override Type BehaviourType”的执行，但此后代码中没有其他方法被触发(我发送了请求并得到了响应，服务响应良好)。我在每个方法中设置了调试点，没有其他执行! (特别是ApplyDispatchBehavior)。有人可以指出我缺少什么吗？

Answer 1

引用CreateBehavior() is not invoked对于类似的问题。

确保您的服务元素的名称与mynamespace.myservicename相对应

即使您没有正确的服务名称，该服务也会提供正确的响应；但只有当您拥有正确的服务元素名称时，才会调用 CreateBehavior()。

示例

<service
      name="WcfServiceApp001.Service1"
      behaviorConfiguration="InternalPayrollBehavior">
<endpoint address="" binding="basicHttpBinding"
          behaviorConfiguration="EndpointBehavior"
          contract="WcfServiceApp001.IService1"
          />
</service>