Question

所以基本上我想在集中的地方处理WCF服务中的异常。为此，我创建了一个实现IErrorHandler的类和一个实现IServiceBehavior的类，并且在该Service Behavior实现中，我说对于每个通道调度程序，我想添加这样的自定义错误处理程序。

public void ApplyDispatcherBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
    IErrorHandler errorHandler = new CustomErrorHandler();
    foreach (var channelDispatcher in serviceHostBase.ChannelDispatchers)
    {
        channelDispatcher.ErrorHandlers.Add(errorHandler);
    }
}

并且我做的最后一件事是创建一个类，该类派生自具有适当实现的BehaviorExtensionElement并在配置文件中注册扩展。但它似乎没有用。我的意思是我想做的事情是如果异常保持未处理我想在集中的地方处理它。但它似乎对我不起作用。我的实现是否正确，我是否误解了我实现的这一切应该如何工作。任何建议都将不胜感激。

<serviceHostingEnvironment multipleSiteBindingsEnabled="true">
    <bindings>
      <basicHttpBinding>
        <binding name="soapBinding" />
      </basicHttpBinding>
      <webHttpBinding>
        <binding name="webBinding" />
      </webHttpBinding>
    </bindings>
    <behaviors>
      <endpointBehaviors>
        <behavior name="poxBehavior">
          <webHttp />
        </behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior name="defaultBehavior">
          <serviceDebug includeExceptionDetailInFaults="false" />
          <serviceMetadata httpGetEnabled="true" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <extensions>
      <behaviorExtensions>
        <add name="MyCustomBehaviorExtensionElement" type="MyNamespace.CustomExtensionElement, MyNamespace, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
      </behaviorExtensions>
    </extensions>
    <services>
      <service name="MyNamespace.MyService" behaviorConfiguration="defaultBehavior">
        <endpoint address="pox" binding="webHttpBinding" behaviorConfiguration="poxBehavior"
                  name="pox" contract="MyNamespace.IMyService" />
        <endpoint address="soap" binding="basicHttpBinding" bindingConfiguration="soapBinding"
                  name="soap" contract="MyNamespace.IMyService" />
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost/Services" />
          </baseAddresses>
        </host>
      </service>

这是配置文件的一部分

Answer 1

错过了您的网络配置

如果您未申请扩展程序，则需要在扩展程序中添加服务行为：

  <serviceBehaviors>
    <behavior name="defaultBehavior">
      <serviceDebug includeExceptionDetailInFaults="false" />
      <serviceMetadata httpGetEnabled="true" />

      <MyCustomBehaviorExtensionElement />
    </behavior>
  </serviceBehaviors>

<强>的WebHttpBinding：

但是，为了处理WebHttpBinding的错误，你必须使用这样的方法：

using System;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Configuration;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using log4net;

namespace Server.Web
{
    public class WebHttpWithErrorHandlingElement : BehaviorExtensionElement
    {
        public class WebHttpWithErrorHandlingBehavior : WebHttpBehavior
        {
            internal sealed class WebHttpErrorHandler : IErrorHandler
            {
                private static readonly ILog logger = LogManager.GetLogger(typeof (WebHttpErrorHandler));

                public void ProvideFault(Exception error, MessageVersion version, ref Message fault)
                {
                    var exception = new FaultException("Web Server error encountered. All details have been logged.");
                    var messageFault = exception.CreateMessageFault();

                    fault = Message.CreateMessage(version, messageFault, exception.Action);
                }

                public bool HandleError(Exception error)
                {
                    logger.Error(string.Format("An error has occurred in the Web service {0}", error));

                    return !(error is FaultException);
                }
            }

            protected override void AddServerErrorHandlers(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
            {
                base.AddServerErrorHandlers(endpoint, endpointDispatcher);

                endpointDispatcher.DispatchRuntime.ChannelDispatcher.ErrorHandlers.Add(new WebHttpErrorHandler());
            }
        }

        public WebHttpWithErrorHandlingElement()
        {
        }

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

        protected override object CreateBehavior()
        {
            return new WebHttpWithErrorHandlingBehavior();
        }
    }
}

配置文件：

<system.serviceModel>
  <extensions>
    <behaviorExtensions>
      <add name="webHttpWhithErrorHanlding" type="Server.Web.WebHttpWithErrorHandlingElement, Server.Web"/>
    </behaviorExtensions>
  </extensions>


  <!-- other staff -->
  <behaviors>
    <endpointBehaviors>
      <behavior name="webBehavior">
        <webHttpWhithErrorHanlding />
      </behavior>
    </endpointBehaviors>

  </behaviors>
</system.serviceModel>

然后将其应用到您的终端：

  <service name="YourServiceContract">

    <endpoint address=""
              binding="webHttpBinding"
              behaviorConfiguration="webBehavior"
              contract="IYourServiceContract"/>
    <host>
      <baseAddresses>
        <add baseAddress="http://localhost/"/>
      </baseAddresses>
    </host>        
  </service>

WCF如何全局处理错误

1 个答案: