Why is there an endless redirect from https to http and vice versa?

Question

Nginx

Hello!
I installed the certificate using https://letsencrypt.org/.

But when entering the site, there is an endless redirection from http to https and vice versa, the error "The site stasenok.com redirected too many times." "ERR_TOO_MANY_REDIRECTS".

What could be the problem, I don’t understand the server settings well.

I am attaching a screenshot of my nginx domain config file:



And also the config connected to it:

Answer 1

That's why

if ($host = stasenok.com ) {
return 301 .... 
}

and it should be like this

if ($scheme = http) {
        return 301 https://$server_name$request_uri;
    }

Answer 2

1. In the main server config, in the http {} section, write:
   

   http {
       map "$server_port:$host" $is_https_redirect {
           "~^80:(.+)" 1;
       }
   }

   
   
2. server which listen 80 we remove altogether
   
3. In the server that listen 443 ssl add listen 80
   
4. We add there:
   

   if ($is_https_redirect) {
           return 301 https://$host$request_uri;
       }

   
   
5. Let's start the server