从xhr获取方法和url

恐怕不是本地的。在原型实现中,您可以编写自己的原型:

XMLHttpRequest.prototype.__oldOpen = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.verb = "";
XMLHttpRequest.prototype.url  = "";
XMLHttpRequest.prototype.open = function (verb, url, async)
{
    this.verb = verb;
    this.url  = url;
    this.__oldOpen.call(this, verb, url, async); 
}

不过,别指望它能在IE7和更老的版本中工作。

var oldXHR = XMLHttpRequest;
function XMLHttpRequest()
{
    var realXHR = new oldXHR();
    this.onreadystatechange = function () {}
    this.open = function (verb, url, async)
    {
        this.verb = verb;
        this.url  = url;
        realXHR.open(verb, url, async);
    {
    this.send = function () { realXHR.send(); }

    // all other properties and methods... 
}

当然,您必须努力正确绑定 onreadystatechange 设置 status 等。