在我的应用中，我正在创建从HTTP到HTTPS的AJAX请求。这意味着我需要CORS。因此，我向jQuery.ajax添加了一些标题和参数并对其进行了测试。在Firefox中，一切正常，但在Chrome中，一切正常。Chrome会“杀死”每一个预先提出的请求（选项）。

jQuery脚本：

$(document).on('click', 'a.ajax', function(e) {
    e.preventDefault();
    $.ajax(this.href, {
        type: 'GET',
        dataType: 'json',
        crossDomain: false,
        headers: {'X-Requested-With': 'XMLHttpRequest'},
        xhrFields: {
            withCredentials: true
        }
    });
    return false;
});

HTTP转储：

> OPTIONS /foo HTTP/1.1
> User-Agent: curl/7.29.0
> Host: local.bar.cz
> Accept: */*
> Access-Control-Request-Headers:accept, origin, x-requested-with
> Access-Control-Request-Method:GET
> Origin:http://local.bar.cz
> 
< HTTP/1.1 204
< Server: nginx/1.2.7
< Date: Wed, 27 Feb 2013 15:06:54 GMT
< Content-Type: text/html; charset=utf-8
< Connection: keep-alive
< X-Powered-By: Nette Framework
< X-Frame-Options: SAMEORIGIN
< Access-Control-Allow-Origin: http://local.bar.cz
< Access-Control-Allow-Credentials: true
< Access-Control-Allow-Headers: accept, origin, x-requested-with
< Access-Control-Allow-Methods: OPTIONS, GET, POST, HEAD
<

有人知道为什么Chrome会终止此请求吗？