WeChat applet keeps transferring without requesting interface

Recently, the small program development and test environment has been changing to not requesting the interface. iOS can be accessed normally, but Android cannot be accessed. The prompt: request:fail -2:net::ERR_FAILED After checking, it is found that the middleman certificate is not configured. Because of the test environment, we used acme to apply for let's encrypt pan-domain certificate.

Since our DNS resolution is hosted in DNSPOD, it can be used

export DP_Id="43211"     #DNSPOD APP_ID
export DP_Key="123123ss123112e21e332e432e32e"  #DNSPOD KEY
acme.sh --issue --dns dns_dp -d abc.cn -d *.m.abc.cn -d *.abc.cn    #域名,这里生成 abc.cn *.abc.cn *.t.abc.cn的泛影证书

And the analysis hosted on Alibaba Cloud is

export Ali_Key="kkkkkkeeeeeyyyyyyyyy"
export Ali_Secret="ssssseeeeeccccrrrrreeeeetttttt"
acme.sh --issue --dns dns_ali -d xyz.cn -d *.xyz.cn

It can be generated.

In the ~/.acme directory, the corresponding certificate directory is generated. For
example, if my domain name is abc.cn, there is
ca.cer fullchain.cer abc.cn.cer abc in the ~/.acme/abc.cn directory . cn.conf abc.cn.csr abc.cn.csr.conf abc.cn.key
corresponding file, before I used abc.cn.cer and abc.cn.key

The configuration of nginx is

    #ssl_certificate      host/keys/abc.cn.cer;      #使用这个文件小程序无法使用
            ssl_certificate      host/keys/fullchain.cn.cer;   #使用这个正常访问
    ssl_certificate_key  host/keys/abc.cn.key;

But after that, it was found that the small program was not working, and the fullchain.cer certificate must be used.
We can see that fullchain.cer and abc.cn.cer are missing a ca.cer

Of course, if you don’t know what your ca.cer is, you can go to https://www.myssl.cn/tools/downloadchain.html and copy your certificate file into it to know your middleman certificate.