How to disable redirect to https for robots.txt?

Question

Nginx

There is a site that works under nginx, the entire site redirects from http to https, but actually how to make robots.txt open in the same way via http?
If in .htaccess, it's done like this:

RewriteCond %{HTTPS} off
RewriteCond %{REQUEST_URI} !^/robots.txt$ [NC]
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [NC,R=301,L]

How to do it on nginx?

Answer 1

Finally decided this:

server {
     listen 80;
     server_name site.ru;
   root  /var/www/site.ru;
   
  location ~* ^.+\.(txt|css|js|xml)$ { }

    location / {
        return 301 https://site.ru$request_uri;
    }
}

Answer 2

server {
    listen 80;
    server_name site.ru www.site.ru;
    root /var/www;

    location = /robots.txt {   }
    
    location / {
        return https://site.ru$request_uri;
    }
}

Answer 3

And why do you think this is necessary?