如何将自定义EndPointBehavior添加到服务的web.config？

Question

我已经按照这篇文章进行了创建MyMessageInspector和分析MyEndPointBehavior,如下所示:

public class MyMessageInspector : IDispatchMessageInspector
{
    public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
    { 
        Console.WriteLine("Incoming request: {0}", request);
        return null;
    }

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

public class MyEndPointBehavior : IEndpointBehavior
{
    #region IEndpointBehavior Members

    public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
    {
    }

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

    public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
    {
        ChannelDispatcher channelDispatcher = endpointDispatcher.ChannelDispatcher;
        if (channelDispatcher != null)
        {
            foreach (EndpointDispatcher ed in channelDispatcher.Endpoints)
            {
                ed.DispatchRuntime.MessageInspectors.Add(new MyMessageInspector());
            }
        }
    }

    public void Validate(ServiceEndpoint endpoint)
    {
    }

    #endregion
}

如何将MyEndPointBehavior添加到web.config？

我添加了以下扩展程序:

<extensions>
  <behaviorExtensions>
    <add name="myMessageInspector" type="MessageInspectorProject.MyEndPointBehavior, MessageInspectorProject, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
  </behaviorExtensions>
</extensions>

但是当我尝试在下面使用它时,它会抱怨:

<serviceBehaviors>
    <behavior>
      <myMessageInspector/>

它的抱怨如下:

配置中的元素无效.扩展名'myMessageInspector'不是从正确的扩展基类型'System.ServiceModel.Configuration.BehaviorExtensionElement'派生的.

如何添加MyEndPointBehavior到web.config？

Answer 1

您还必须创建自定义BehaviorExtensionElement并在web.config文件中使用它.有很多文章可以帮助你喜欢这些

http://weblogs.asp.net/paolopia/writing-a-wcf-message-inspector

http://cgeers.com/2011/05/10/wcf-message-logging/

http://burcakcakiroglu.com/?p=2083

http://trycatch.me/adding-custom-message-headers-to-a-wcf-service-using-inspectors-behaviors/

无论如何以这种方式修复你的代码

public class MyMessageInspector : IDispatchMessageInspector
{
    public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
    {
        Console.WriteLine("Incoming request: {0}", request);
        return null;
    }

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

public class MyEndPointBehavior : IEndpointBehavior
{
    #region IEndpointBehavior Members

    public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
    {
    }

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

    public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
    {
        ChannelDispatcher channelDispatcher = endpointDispatcher.ChannelDispatcher;
        if (channelDispatcher != null)
        {
            foreach (EndpointDispatcher ed in channelDispatcher.Endpoints)
            {
                ed.DispatchRuntime.MessageInspectors.Add(new MyMessageInspector());
            }
        }
    }

    public void Validate(ServiceEndpoint endpoint)
    {
    }

    #endregion
}

这里添加新的BehaviorExtensionElement

public class CustomBehaviorExtensionElement : BehaviorExtensionElement
{
    protected override object CreateBehavior()
    {
        return new MyEndPointBehavior();
    }

    public override Type BehaviorType
    {
        get
        {
            return typeof(MyEndPointBehavior);
        }
    }
}

并更新您的web.config

<extensions>
  <behaviorExtensions>
    <add name="myMessageInspector" type="MessageInspectorProject.CustomBehaviorExtensionElement, MessageInspectorProject"/>
  </behaviorExtensions>
</extensions>

<behaviors>
  <endpointBehaviors>
    <behavior>
      <myMessageInspector />
    </behavior>
  </endpointBehaviors>
</behaviors>