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# zagan.bet download page — nginx + php-fpm example.
#
# Install at /etc/nginx/conf.d/zagan.bet.conf (the packaged nginx.conf includes
# conf.d/*.conf). Replace the server name, root, socket and certificate paths.
#
# Only index.php and latest.php are PHP. Everything else under the web root is
# static: /bin/ is immutable and versioned, while the installers are stable and
# revalidated. Any other .php request is refused, so releases.php (an include)
# and stray scripts cannot be downloaded as source.

server {
    listen 80;
    listen [::]:80;
    server_name dl.example.com;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;                       # nginx < 1.25.1: listen 443 ssl http2;
    server_name dl.example.com;

    root /srv/zagan.bet;
    index index.php;

    ssl_certificate     /etc/letsencrypt/live/dl.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/dl.example.com/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;

    # Published binaries: static, versioned, never rewritten.
    location /bin/ {
        try_files $uri =404;
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # The browser app: static files, no framework runtime.
    location = /play {
        return 301 /play/;
    }

    location /play/ {
        try_files $uri $uri/ /play/index.html;
        add_header Cache-Control "no-cache";
        add_header X-Robots-Tag "noindex, nofollow, noarchive" always;
        add_header X-Frame-Options "DENY" always;
        add_header X-Content-Type-Options "nosniff" always;
    }

    # WebSocket gateway. Keep the upgrade headers and a long read timeout:
    # a crash round can idle for a while between pushes.
    location = /ws {
        proxy_pass http://127.0.0.1:8890;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 3600s;
        proxy_send_timeout 3600s;
    }

    # Ask crawlers and scanners to stay out, and never index a page.
    location = /robots.txt {
        default_type text/plain;
        try_files $uri =404;
        add_header Cache-Control "public, max-age=3600";
        add_header X-Robots-Tag "noindex, nofollow, noarchive" always;
    }

    # The page rescans bin/ on every request, so don't cache it.
    location = /index.php {
        include fastcgi_params;
        # Debian/Ubuntu: /run/php/php-fpm.sock
        # Arch:          /run/php-fpm/php-fpm.sock
        fastcgi_pass unix:/run/php/php-fpm.sock;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        add_header Cache-Control "no-cache";
        add_header X-Robots-Tag "noindex, nofollow, noarchive" always;
    }

    # The newest-version feed read by install.sh and install.ps1.
    location = /latest.php {
        include fastcgi_params;
        fastcgi_pass unix:/run/php/php-fpm.sock;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        add_header Cache-Control "no-store";
        add_header X-Robots-Tag "noindex, nofollow, noarchive" always;
    }

    # Stable installers: always revalidate so a fix reaches the next download.
    location = /install.sh {
        default_type text/plain;
        add_header Cache-Control "no-cache";
    }

    location = /install.ps1 {
        default_type text/plain;
        add_header Cache-Control "no-cache";
    }

    location / {
        try_files $uri $uri/ =404;
    }

    # releases.php is an include only; no other script is meant to be served.
    location ~ \.php$ {
        return 404;
    }

    # Never serve dotfiles (.gitignore, editor leftovers).
    location ~ /\. {
        deny all;
    }
}