使用IErrorHandler在HandleError或ProvideFault中记录WCF中的异常？ [英] Logging exceptions in WCF with IErrorHandler inside HandleError or ProvideFault?

问题描述

我正在使用IErrorHandler在WCF中执行异常处理，现在我要记录异常以及引起异常的堆栈跟踪和用户。

我可以看到让用户引起异常的唯一方法是：

OperationContext.Current.IncomingMessageProperties.Security.ServiceSecurityContext.PrimaryIdentity

...但这只是似乎在ProvideFault内部工作，而不是HandleError内部。有没有办法让用户在HandleError内部？我想使用HandleError而不是ProvideFault，就像在后台线程上调用的那样，用于错误记录，对吧？

解决方案

IErrorHandler的两种方法具有相当明确的职责：

• HandleError 在这里处理所有未被捕获例外 - 这就是为什么它是做日志记录的最佳地方 - 这真的是它的全部原因。




• ProvideFault 的任务是转向您的.NET异常成为可互操作的SOAP错误 - 或者忽略全部的异常

当然，没有什么技术上阻止你从您在 ProvideFault 方法中进行登录时，如果我不得不寻找这个方法，那么我不会去找那个功能。我倾向于遵循最不重要的原则 - 如果方法称为 ProvideFault ，我只希望它提供一个 FaultException< T> / code> - 不要做很多其他的事情。

要访问您的服务的安全上下文，请使用以下代码片段：

  ServiceSecurityContext secCtx = ServiceSecurityContext.Current; 
 
 if（secCtx.PrimaryIdentity！= null）
 {
 //做某些主要身份
} 
  / pre> 
I'm using IErrorHandler to do exception handling in WCF and now I want to log the exceptions, along with the stack trace and the user that caused the exception.

The only way I can see to get the user that caused the exception is:

OperationContext.Current.IncomingMessageProperties.Security.ServiceSecurityContext.PrimaryIdentity

...But this only seems to work inside ProvideFault, and not inside HandleError.  Is there a way to get the user inside HandleError?  I would like to use HandleError instead of ProvideFault as that's called on a background thread and meant for error logging, right?
解决方案
The two methods of the IErrorHandler have quite well defined responsibilities:


HandleError is here to handle all uncaught exceptions - that's why it's the best place to do your logging - that's really its whole reason to be
ProvideFault is tasked with turning your .NET exception into an interoperable SOAP fault - or ignore the exception alltogether


Of course, there's nothing technically stopping you from doing your logging in the ProvideFault method - it's just not the place I would go look for that functionality if I ever had to look for it. I tend to like to follow to principle of least surprise - if the method is called ProvideFault, I only expect it to provide a FaultException<T> - not do a lot of other things, too.

To get access to your service's security context, use this snippet of code:
ServiceSecurityContext secCtx = ServiceSecurityContext.Current;

if(secCtx.PrimaryIdentity != null)
{
   // do something with primary identity
}


                        
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