为什么Web服务或HTTP处理程序调用会产生两个未经授权的错误然后一次成功？(Why do web service or HTTP handler calls give two unauthorize

为什么Web服务或HTTP处理程序调用会产生两个未经授权的错误然后一次成功？(Why do web service or HTTP handler calls give two unauthorized errors and then a single success?)

访问我编写的应用程序时，FireBug显示每次调用Web服务或HTTP处理程序都会尝试三次，前两次显示为“401 Unauthorized”，即使它们返回正确的结果。 这一致。 每个电话都做同样的事情。

任何想法为什么会这样？

When accessing an application I've written FireBug shows that each call to a web service or HTTP handler is attempted three times, and the first two times show as '401 Unauthorized' even though they return the correct result. This consistent. Every call does this same thing.

Any ideas why this happens?

最满意答案

它正在进行NTLM授权的谈判。 检查Microsoft NTLM上的MSDN： http ： //msdn.microsoft.com/en-us/library/aa378749.aspx

It is performing a negotiation for NTLM authorization. Check on the MSDN on Microsoft NTLM: http://msdn.microsoft.com/en-us/library/aa378749.aspx