CORS与jQuery和XDomainRequest在IE8 / 9 [英] CORS with jQuery and XDomainRequest in IE8/9
问题描述
更新：我强烈建议不要在XDomainRequest中投入任何时间，因为它是一个非常差的实施，有很多限制。
UPDATE: I highly recommend not investing any time in XDomainRequest, because it is a terribly poor implementation with many limitations. It basically only really works for GET requests to non-ssl servers, so you might as well use jsonp or whatever.
JQuery 拒绝为XDomainRequest提供原生支持，但建议添加此支持的多个jQuery插件。此主题建议使用两个这样的插件： jQuery.XDomainRequest.js 和 xdr.js ，它已被报告工作。 Afaik，插件应该自动覆盖 jQuery.ajax 的行为。我找到了另一个插件这里。
JQuery refuses to provide native support for XDomainRequest, however several jQuery plugins are suggested to add this support. This topic suggest two such plugins: jQuery.XDomainRequest.js and xdr.js, which has been reported to work. Afaik, the plugins should automatically override behavior of jQuery.ajax. I found another plugin here.
我把一些演示页面与相应的插件 jQuery.XDomainRequest 和 xdr 和 jquery.ie.cors 向CORS启用的服务器执行ajax请求。这些页面在Chrome和Firefox中正常工作，但IE8 / 9立即抛出一个权限被拒绝错误（即使在发出请求之前）。此 MSDN帖子建议添加另一个处理程序 xhr.onprogress = function（）{}; 但我试过这个，它也不工作。
I put a little demo pages with the respective plugins jQuery.XDomainRequest and xdr and jquery.ie.cors that perform ajax requests to a CORS enabled server. The pages are working in Chrome and Firefox, however IE8/9 instantly throw a permission denied error (even before making the request). This MSDN post suggest adding another handler xhr.onprogress = function() {}; but I tried this and it isn't working either.
任何线索我做错了什么？我也已经测试过IE8现在使用MS虚拟服务器，但它有完全相同的问题。
Any clues what I am doing wrong? I have also tested with IE8 now using MS virtual server, but it has exactly the same problem.
编辑：好吧，所以我想出了问题的一部分，通过HTTPS使用POST。显然XDomainRequest不允许通过HTTPS的CORS。我可以切换到HTTP，但我真的需要POST。
OK so I figured out that part of the problem was that I was using POST over HTTPS. Apparently XDomainRequest does not allow CORS over HTTPS. I can switch to HTTP but I really need POST.
Edit2：请参阅此问题在github 结束这个故事。事实证明，当使用HTTP POST时，xDomainRequest只能将请求主体（参数）编码为 text / plain 。这几乎使它没有价值，因为每个人都使用 application / x-www-form-urlencoded 或 multipart / form-data 。
See this issue on github for the end of this story. It turns out that when using HTTP POST, the xDomainRequest can only encode the request body (arguments) as text/plain. This pretty much makes it worthless, because everyone uses application/x-www-form-urlencoded or multipart/form-data.
推荐答案
支持POST方法，要创建跨网域https：//请求，您的呼叫页面还需要通过https加载。这是我找到的最好的文章，详细解释XDomainRequest的这些和其他限制：
POST method is supported, and to make a cross-domain https:// request your calling page would also need to be loaded over https. This is the best article I have found which explains these and other limitations of XDomainRequest in detail:
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