openresty deny request with access_by_lua

Developer from somewhere

Example config:

location ~ ^/some_location {
  access_log on;

  access_by_lua '
    if not some_condition then
      ngx.exit(ngx.HTTP_FORBIDDEN);
    end
  ';
  ...
  proxy_pass             http://$your_backend;
}

This way, if some_condition is not true, nginx will return a 403 and not do the proxy pass.