Windows模拟器XMLHttpRequest相关问题

Creator 2.x
#1

在Windows下的Creator进行模拟器调试，XMLHttpRequest对象的response为空，但是在浏览器能正常收到。
而且两边状态码都是200，请问怎么解决？

操作系统：win7，creator版本：1.5.1

var xhr = cc.loader.getXMLHttpRequest();
xhr.onreadystatechange = function () {
            if (!xhr || xhr.isAborted) {
                return;
            }

            if (xhr.readyState == 4) { 
                var response = xhr.responseText;
                if (xhr.cb) {
                    var resp = {};
                    if (xhr.status == 200) {
                        resp = JSON.parse(response);
                        cc.log("response: ", response);
                    }
                    else {
                    }
                }
            }
        };

报错信息：
2017-07-20T03:06:14.268Z - normal: Simulator: ResponseText was empty, probably there is a network error!
2017-07-20T03:06:14.268Z - normal: Simulator: response:
2017-07-20T03:06:14.269Z - error: Simulator: 2877:TypeError: param.data is undefined