错误:Mixed Content: The page at ‘https://XXX’ was loaded over HTTPS, but requested an insecure.......
https地址中，如果加载了http资源，浏览器将认为这是不安全的资源，将会默认阻止，这就会给你带来资源不全的问题了，比如：图片显示不了，样式加载不了，JS加载不了。
控制台报错：
Mixed Content: The page at 'https://xxx' was loaded over HTTPS, but requested an insecure frame 'http://music.163.com/m/outchain/player?type=2&id=2024225492&auto=1&height=66'. This request has been blocked; the content must be served over HTTPS.
解决方案
第一种
1.首先确定引入的资源可以在http和https下都能访问
比如：http://music.163.com/outchain/player?type=2&id=2024225492
https://music.163.com/outchain/player?type=2&id=2024225492
2.在head里面写类似相对路径的形式
- <script src="music.163.com/outchain/player?type=2&id=2024225492" type="text/javascript"></script>
第二种
1.在页面中加入（meta）头中添加upgrade-insecure-requests
- <meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
2.这将会把http请求转化为https请求。这样就不会再出现Mixed Content的错误了。
