# RaceCore public-training reverse proxy template for Teltonika/OpenWrt.
# Replace racecore.example.org, 192.0.2.10:8081 and certificate paths.
user root;
worker_processes 1;
pid /var/run/racecore-nginx.pid;
error_log /tmp/racecore-nginx-error.log warn;

events { worker_connections 256; }

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    client_body_temp_path /tmp/nginx/client_body;
    proxy_temp_path /tmp/nginx/proxy;
    fastcgi_temp_path /tmp/nginx/fastcgi;
    uwsgi_temp_path /tmp/nginx/uwsgi;
    scgi_temp_path /tmp/nginx/scgi;
    access_log off;
    sendfile on;
    keepalive_timeout 30;
    server_tokens off;

    upstream racecore_backend {
        server 192.0.2.10:8081;
        keepalive 4;
    }

    server {
        listen 443 ssl;
        server_name racecore.example.org;

        ssl_certificate /etc/uhttpd.crt;
        ssl_certificate_key /etc/uhttpd.key;
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_prefer_server_ciphers on;
        ssl_ciphers 'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA256';

        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "no-referrer" always;
        add_header X-Frame-Options "SAMEORIGIN" always;

        location ^~ /public-training/ {
            limit_except GET HEAD { deny all; }
            proxy_pass http://racecore_backend;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_set_header Host $host;
            # RaceCore normally sees an http backend while the browser uses https.
            # Removing browser Origin avoids a false same-origin CORS rejection.
            proxy_set_header Origin "";
            proxy_set_header Referer "";
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Host $host;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_connect_timeout 3s;
            proxy_read_timeout 30s;
            proxy_send_timeout 30s;
            proxy_buffering off;
            add_header Cache-Control "no-store" always;
        }

        location = /src/public_training.js {
            limit_except GET HEAD { deny all; }
            proxy_pass http://racecore_backend;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_set_header Host $host;
            proxy_set_header Origin "";
            proxy_set_header Referer "";
            proxy_set_header X-Forwarded-Proto $scheme;
            add_header Cache-Control "no-store" always;
        }

        location = /src/public_training.css {
            limit_except GET HEAD { deny all; }
            proxy_pass http://racecore_backend;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_set_header Host $host;
            proxy_set_header Origin "";
            proxy_set_header Referer "";
            proxy_set_header X-Forwarded-Proto $scheme;
            add_header Cache-Control "no-store" always;
        }

        location / { return 404; }
    }
}