我在我的mvc具有全球ExceptionFilter返回例外\的WebAPI申请注册为:如何优雅地从的WebAPI消息处理程序
public virtual void RegisterHttpFilters(HttpConfiguration config)
{
config.Filters.Add(new MyExceptionFilter(_exceptionHandler));
}
其中MyExceptionFilter是:
public class MyExceptionFilter : ExceptionFilterAttribute
{
private readonly IMyExceptionHandler m_exceptionHandler;
public MyExceptionFilter(IMyExceptionHandler exceptionHandler)
{
m_exceptionHandler = exceptionHandler;
}
public override void OnException(HttpActionExecutedContext context)
{
Exception ex = context.Exception;
if (ex != null)
{
object response = null;
HttpStatusCode statusCode = m_exceptionHandler != null
? m_exceptionHandler.HandleException(ex, out response)
: HttpStatusCode.InternalServerError;
context.Response = context.Request.CreateResponse(statusCode, response ?? ex);
}
base.OnException(context);
}
}
该过滤器返回的所有异常作为json对象,并允许一些IMyExceptionHandler实现来定制返回的对象。
这一切都很好。直到我有我的一些消息处理程序的异常:
public class FooMessageHandler : DelegatingHandler
{
private readonly Func<IBar> _barFactory;
public FooMessageHandler(Func<IBar> barFactory)
{
_barFactory = varFactory;
}
protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
request.Properties["MY_BAR"] = _barFactory();
return base.SendAsync(request, cancellationToken);
}
}
正如你可以看到这个处理程序创建的一些组件,并把它放到当前的HTTP请求消息。 当FuncOfIBar发生异常时,我会得到死亡黄色屏幕。我的ExceptionFilter没有被调用。
我想专门捕获在消息处理异常,并返回HttpResponseException,但它不会改变任何东西 - 仍然得到YSOD:
public class XApplicationInitializerMessageHandler : DelegatingHandler
{
private readonly Func<IXCoreApplication> _appFactory;
private readonly IXExceptionHandler m_exceptionHandler;
public XApplicationInitializerMessageHandler(Func<IXCoreApplication> appFactory, IXExceptionHandler exceptionHandler)
{
ArgumentValidator.EnsureArgumentNotNull(appFactory, "appFactory");
_appFactory = appFactory;
m_exceptionHandler = exceptionHandler;
}
protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
try
{
request.SetApplication(_appFactory());
}
catch (Exception ex)
{
object resultObject = null;
HttpStatusCode statusCode = m_exceptionHandler != null
? m_exceptionHandler.HandleException(ex, out resultObject)
: HttpStatusCode.InternalServerError;
HttpResponseMessage responseMessage = request.CreateResponse(statusCode, resultObject ?? ex);
throw new HttpResponseException(responseMessage);
}
return base.SendAsync(request, cancellationToken);
}
}
}
我想我的应用程序的行为是无论发生什么异常:在ApiController或消息处理程序中。
如何做到这一点?
我知道Application_Error,但我想保持HttpApplication定制不可触摸。
http://stackoverflow.com /问题/ 13013973/ASP网的Web-API的默认错误信息 – Timeless 2015-11-18 16:19:11