Use Alibaba cloud's free SSL certificate

Now many browsers and applications must use https Encrypted access to the website , Such as wechat browser 、 Applet H5、IOS Use the geographical location function , Then we have to apply SSL certificate , Now many places can buy SSL certificate , But the prices are relatively expensive , It's a little uneconomical for personal applications or testing , Then we can apply for free services provided by Alibaba cloud SSL certificate , To apply for the address ：https://common-buy.aliyun.com/?spm=5176.2020520163.c1583915649459.d1583915649459.6aa656a7W9T0Yy.6aa656a7W9T0Yy&commodityCode=cas#/buy

We see the free version is 0 yuan , Just buy it directly .

After successful purchase , Click the Apply button .

Download the verification file and upload it to the server for verification , Here, pay attention to the establishment of this .well-known Catalog , You can't create a new one directly , open cmd, Jump to the root directory of the website , Input md .well-known enter , You can create this directory . After passing the audit , We can download the certificate ,IIS Download the corresponding version of ,IIS Refer to the previous blog post for binding methods ：https://blog.csdn.net/mojocube/article/details/105796102