https://blog.wongcw.com/2021/04/13/edge-canary%e6%9c%89%e4%ba%86%e4%b8%80%e5%80%8b%e6%96%b0%e7%9a%84%e5%b7%a5%e4%bd%9c%e7%a9%ba%e9%96%93%e5%8a%9f%e8%83%bd%e4%bd%a0%e7%8f%be%e5%9c%a8%e5%b0%b1%e5%8f%af%e4%bb%a5%e8%a9%a6%e8%a9%a6%e4%ba%86/