Internet Explorer 10 忽略 XMLHttpRequest 'xhr.withCredentials = true' [英] Internet Explorer 10 is ignoring XMLHttpRequest 'xhr.withCredentials = true'

问题描述

我目前在使用 IE10 进行跨域 ajax 调用时遇到问题(在 IE10 模式下，不兼容).

I’m currently having an issue with a cross-domain ajax call using IE10 (in IE10 mode, not compatibility).

情况:我有两个域，http://a 和 http://b.我为 http://b 设置了一个 cookie.我目前在页面 http://a.

Situation: I have two domains, http://a and http://b. I have a cookie set for http://b. I am currently on page http://a.

我想使用 XMLHttpRequest 向 http://b 发出 CORS 请求(根据 http://blogs.msdn.com/b/ie/archive/2012/02/09/cors-for-xhr-in-ie10.aspx)，并在请求中包含 cookie.JS如下:

I want to do a CORS request to http://b using XMLHttpRequest (which should work, according to http://blogs.msdn.com/b/ie/archive/2012/02/09/cors-for-xhr-in-ie10.aspx), and include the cookie in the request. The JS is as follows:

var xhr = new XMLHttpRequest();
xhr.open('GET', 'http://b', true);
xhr.withCredentials = true;
xhr.send();

这应该确保 cookie 附加到请求中；但是，Fiddler 跟踪显示未附加任何 cookie，并且我收到 401: Access Denied.

This should ensure that the cookie is attached to the request; however, the Fiddler trace shows that no cookie is attached, and I get 401: Access Denied.

服务器配置为使用 CORS，它包含访问控制标头:

The server is configured to work with CORS, it includes the Access-Control headers:

Access-Control-Allow-Origin: http://a
Access-Control-Allow-Credentials: true

(这应该没有任何区别，因为没有 OPTIONS 预检请求，并且 IE 发送的第一个请求是 GET，并且 cookie 不存在，因此导致 401).

(this should not make any difference, since there is no OPTIONS preflight request, and the first request IE sends is a GET, and the cookie is not present, thus causing a 401).

此外，JS 代码段在 Firefox 和 Opera 中都可以正常工作.

Furthermore, the JS snippet works fine in both Firefox and Opera.

推荐答案

这可能是同一个旧的 IE P3P 问题.使用 IE 的默认设置，如果设置的 cookie 没有 P3P 标头也出现在响应中，则 cookie 将被标记为仅限第一方".这意味着在第三方上下文中，例如 iframe 或 CORS 请求，IE 将拒绝发送 cookie.

It's probably the same old IE P3P issue. With IE's default settings, if a cookie is set without a P3P header also present in the response, the cookie is marked as "first-party only". Which means that in a third-party context, such as an iframe or a CORS request, IE will refuse to send the cookie.

要修复它，您需要在设置 cookie 时提供 P3P 标头.请参阅 http://msdn.microsoft.com/en-us/library/ms537343%28v=vs.85%29.aspx 了解详情.

To fix it, you need to supply a P3P header when setting the cookies. See http://msdn.microsoft.com/en-us/library/ms537343%28v=vs.85%29.aspx for details.

更新:链接现已失效，但您可以在 互联网档案馆

Update: Link is now dead, but you can see it at the Internet Archive

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