How to set up a request passing through several servers?

Question

Nginx

Hello. There is one site (site 1), there is another site (site 2). Site 2 runs under the flag and parses requests. How to make it so that when a user accesses site 1, he first goes to site 2, and then, if the request is valid, the request goes to site 1?
In my attempts with reverse proxies, everything ends with an endless redirect, so I'm asking for help. Thanks in advance.

Answer 1

nginx.org/en/docs/http/ngx_http_auth_request_modul...