XmlHttpRequest status 0而不是IE 10中的401 [英] XmlHttpRequest status 0 instead of 401 in IE 10

问题描述

我遇到了这个问题。我想这是某种IE错误，但我想确定。

I have hit a wall with this issue. I guess it is some kind of IE bug but I want to be sure.

所以问题是。为什么IE10 XmlHttpRequest.status返回0而不是401？

So the question is. Why does IE10 XmlHttpRequest.status returns 0 instead of 401?

var xmlhttp=new XMLHttpRequest();

xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4)
    {
      document.getElementById("rescode").innerHTML="Request completed with status: "+xmlhttp.status;
    }
  }
xmlhttp.open("GET","http://hosting.gregy.cz/cors/",true);
xmlhttp.send();

请参阅plunker here： http://plnkr.co/edit/E2lCflPDHHaQi7t79IeM?p=preview

See plunker here: http://plnkr.co/edit/E2lCflPDHHaQi7t79IeM?p=preview

此代码触发一个始终返回401的CORS请求。 Firefox和chrome正确地返回401状态属性，但IE10返回0.这个问题打破了我用于我的项目的身份验证处理方法。

This code fires a CORS request which always returns 401. Firefox and chrome correctly return 401 in status attribute but IE10 returns 0. This issue breaks authentication handling methods I use for my project.

谢谢

编辑：

我已使用onload和onerror事件处理程序修改plunker（tip from monsur的注释）但结果仍然是一样的。

I have modified the plunker with onload and onerror event handlers (tip from monsur's comment), but the result is still the same.

我也确保IE10没有选择兼容模式。 （来自cernunnos的评论）

I have also made sure IE10 has no compatibility mode selected. (tip from cernunnos's comment)

推荐答案

这似乎是IE10的一个错误（ https： //connect.microsoft.com/IE/feedback/details/785990/ie-10-on-win8-does-not-assign-the-correct-status-to-xmlhttprequest-when-the-result-is-401 ）。

This appears to be a bug in IE10 (https://connect.microsoft.com/IE/feedback/details/785990/ie-10-on-win8-does-not-assign-the-correct-status-to-xmlhttprequest-when-the-result-is-401).

IE10将HTTP状态401视为网络错误。控制台显示：

IE10 is treating HTTP status 401 as a network error. The console shows:

SCRIPT7002: XMLHttpRequest: Network Error 0x80070005, Access is denied

根据XMLHttpRequest Level 2规范，如果设置了错误标志（例如由于网络错误），状态属性应为零。但是，规范还规定（ http://www.w3.org/TR/XMLHttpRequest2 /＃infrastructure-for-the-send-method ）网络错误

According to the XMLHttpRequest Level 2 specification the status attribute should be zero if the error flag is set (for example because of a network error). However the specification also states (http://www.w3.org/TR/XMLHttpRequest2/#infrastructure-for-the-send-method) that a network error

不包括HTTP响应，类型的错误，如
作为HTTP状态代码410.

does not include HTTP responses that indicate some type of error, such as HTTP status code 410.

我认为很明显，HTTP状态401不应该被视为网络错误（因为它不是在Chrome，Firefox和Safari），这是在IE10中的错误。

I think it is clear that HTTP status 401 should not therefore be treated as a network error (as it is not in Chrome, Firefox and Safari) and that this is a bug in IE10.

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