README.md

Такое вот программирование на nginx.

$ curl -I localhost:9999/
HTTP/1.1 429 Too Many Requests
Server: nginx/1.12.2
Date: Thu, 14 Nov 2019 21:06:14 GMT
Content-Type: text/html
Content-Length: 185
Connection: close
Retry-After: 100

nginx.conf

server {
    listen 9999;

    location / {
        auth_request /auth;
        auth_request_set $auth_status $status;
        auth_request_set $retry_after $upstream_http_retry_after;
        error_page 500 = @500;
        echo 'Hi!\n';
    }

    location = /auth {
        proxy_pass http://localhost:9998;
    }

    location @500 {
        if ($auth_status = 429) {
            add_header Retry-After $retry_after always;
            return 429;
        }

        return 500;
    }
}

server {
    listen 9998;
    add_header Retry-After 100 always;
    return 429;
}