题
根据Mozilla开发中心的说法 HTTP访问控制 文章,跨站点邮政请求可以“简单” - 即不需要预覆盖 - 如果请求的内容类型为 application/x-www-form-urlencoded
.
我没有在Firefox中获得这种行为,也根本不明白为什么这样。这是我的设置代码:
function makeXDomainRequest(url, method, data) {
var req =
typeof XDomainRequest !== "undefined" ?
new XDomainRequest() : new XMLHttpRequest();
req.open(method || "GET", url, true);
if (typeof req.onload !== "undefined") {
req.onload = onResponseLoad;
req.onerror = onRequestError;
} else {
req.onreadystatechange = onRequestStateChange;
}
if (data && typeof req.setRequestHeader === "function") {
req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
} else {
// no way to set Content-Type req header in IE's XDomainRequest:
// http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
}
req.send(data || null);
}
function onResponseLoad() {
alert("Response!\n" + this.responseText);
}
function onRequestError(args) {
alert("Error!");
}
function onRequestStateChange() {
if (this.readyState === 4) {
if (this.status === 200) {
onResponseLoad.apply(this);
} else {
onRequestError.apply(this);
}
}
}
这是我正在使用的服务器:
// thanks to http://saltybeagle.com/cors/ for having this demo endpoint:
var URL = "http://ucommbieber.unl.edu/CORS/cors.php";
现在,如果我做一个简单的帖子请求 - 将数据发送为 application/x-www-form-urlencoded
在上面的代码中 - 该请求在Firefox中预先闪烁,并带有选项请求。它没有在镀铬中预击。在运行此之前,打开提琴手,亲自看:
makeXDomainRequest(URL, "POST", "name=foobar");
// alerts "Response! Hello CORS [...] You sent a POST request. Your name is foobar"
这是提琴手中的飞行前选项请求(请注意 Access-Control-Request-Method: POST
即使我指定了所谓的安全内容类型,也没有自定义标题):
OPTIONS http://ucommbieber.unl.edu/CORS/cors.php HTTP/1.1
Host: ucommbieber.unl.edu
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
Origin: http://localhost
Access-Control-Request-Method: POST
这是怎么回事?这是Firefox中的错误,还是我做错了什么?谢谢!
解决方案
事实证明,这确实是一个Firefox错误。它最终被修复了FF4B6: https://bugzilla.mozilla.org/show_bug.cgi?id=588920
不隶属于 StackOverflow