CORS跨域访问local本地服务端资源的问题：
浏览器打开部署在服务器的服务，访问本地开启的服务端资源，提示Access to XMLHttpRequest at 'http://localhost' from origin 'http://iot.hhf.com' has been blocked by CORS policy: The request client is not a secure context and the resource is in more-private address space local.
解决办法：
- 打开浏览器，进入chrome://flags/页面
- 搜索Block insecure private network requests
- 设置为Disabled，Relaunch就好了。
