【报Bug】更新HBuilder后内部Hello mui例程的Ajax网络请求操作有问题

详细问题描述
[内容]
ajax（网络请求）功能异常，更新之前的版本没有问题！

重现步骤
[步骤]
在Hello mui APP的ajax（网络请求）中，type选GET，dataType选JSON，点击发送请求

[结果]
输出以下调试信息：
应用HelloMui_new已启动...
XMLHttpRequest cannot load http://www.dcloud.io/check/update?appid=HBuilder&version=8.1.0&imei=866407010195154. Origin null is not allowed by Access-Control-Allow-Origin.
beforeSend:::{"url":"https://service.dcloud.net.cn/ajax/echo/json?name=mui&version=pre-release&author=chb&description=%E6%9C%80%E6%8E%A5%E8%BF%91%E5%8E%9F%E7%94%9FAPP%E4%BD%93%E9%AA%8C%E7%9A%84%E9%AB%98%E6%80%A7%E8%83%BD%E5%89%8D%E7%AB%AF%E6%A1%86%E6%9E%B6","dataType":"json","type":"GET","context":null,"accepts":{"script":"text/javascript, application/javascript, application/x-javascript","json":"application/json","xml":"application/xml, text/xml","html":"text/html","text":"text/plain"},"timeout":0,"processData":true,"cache":true} at examples/ajax.html:100
XMLHttpRequest cannot load https://service.dcloud.net.cn/ajax/echo/json?name=mui&version=pre-release&author=chb&description=%E6%9C%80%E6%8E%A5%E8%BF%91%E5%8E%9F%E7%94%9FAPP%E4%BD%93%E9%AA%8C%E7%9A%84%E9%AB%98%E6%80%A7%E8%83%BD%E5%89%8D%E7%AB%AF%E6%A1%86%E6%9E%B6. Origin null is not allowed by Access-Control-Allow-Origin.
complete:::abort at examples/ajax.html:104

[期望]
和之前版本一样正常工作。

运行环境
[系统版本]
[浏览器版本]
[IDE版本]
HBuilder 8.1.0.201704101430

[mui版本]

附件
[代码片段]
[安装包]

联系方式
[QQ] 327828751
[电话]