如何在wcf rest服务中添加全局错误处理

Question

在我的Web应用程序中,我使用global.asax中的Application_Error函数来记录所有异常,如下所示:

void Application_Error(object sender, EventArgs e)
{
    Exception ex = Server.GetLastError();

    while (ex.GetBaseException() != null)
    {
        ex = ex.GetBaseException();
    }

    log.writeError(ex.ToString());
}

我在WCF REST服务中尝试过类似的运气而没有运气.我如何添加全局错误处理？我看过这篇文章,但我是实现IServiceBehavior的新手.我在哪里添加上面的代码？

Answer 1

我用:

1)AppDomain.CurrentDomain.UnhandledException事件

2)TaskScheduler.UnobservedTaskException事件

3)IErrorHandler:

    public class ErrorHandler : IErrorHandler
    {
        public void ProvideFault(Exception error, MessageVersion version, ref Message fault)
        {
            var faultException = new FaultException<string>("Server error: " + error.Format());
            var messageFault = faultException.CreateMessageFault();
            fault = Message.CreateMessage(version, messageFault, null);
        }

        public bool HandleError(Exception error)
        {
            return false;
            //return true; //if handled
        }
    }

[AttributeUsage(AttributeTargets.Class)]
public class ErrorHandlerBehavior : Attribute, IEndpointBehavior, IServiceBehavior
{
    public void Validate(ServiceEndpoint endpoint)
    {

    }

    public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
    {

    }

    public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
    {
        endpointDispatcher.ChannelDispatcher.ErrorHandlers.Add(new ErrorHandler()); 
    }

    public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
    {

    }

    public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {

    }

    public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
    {

    }

    public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
        foreach (ChannelDispatcher channelDispatcher in serviceHostBase.ChannelDispatchers)
        {
            channelDispatcher.ErrorHandlers.Add(new ErrorHandler());
        }
    }
}

这可以应用于整个服务impl.类:

[ErrorHandlerBehavior]
    public class SubscriberInfoTaskService : {}

或者到终点:

var endpoint = Host.Description.Endpoints.FirstOrDefault();

//foreach (ChannelDispatcher channelDispatcher in Host.ChannelDispatchers) //ChannelDispatcherBase
//{                 
//    channelDispatcher.ErrorHandlers.Add(new ErrorHandler());
//}

endpoint.Behaviors.Add(new ErrorHandlerBehavior());

这里关于使用配置:http://www.steverb.com/post/2008/11/24/Useful-WCF-Behaviors-IErrorHandler.aspx