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# /**
#  * @version    2.11
#  * @package    Engintron for cPanel/WHM
#  * @author     Fotis Evangelou (https://kodeka.io)
#  * @url        https://engintron.com
#  * @copyright  Copyright (c) 2014 - 2025 Kodeka OÜ. All rights reserved.
#  * @license    GNU/GPL license: https://www.gnu.org/copyleft/gpl.html
#  */

# === STATIC ASSET CACHING ===
# Proxy Cache Settings for static files ONLY.
# Nginx can cache static files and directly serve them without issuing calls to
# Apache on every static file request.
#
# By default, Engintron will set a 10s (s for seconds) cache time for static files.
#
# To increase, simply adjust the value for "proxy_cache_valid". Just keep in
# mind that when editing a file and unless you use cache busting techniques,
# Nginx will serve that file's cached copy, until it expires in Nginx cache pool.
#
# Respects the different "Expires" values set per file type in "common_http.conf"
# for client-side caching.
#
# Every other header is ignored, stripped or reset from the request to
# maximize caching.
#
# Static asset caching is turned off when certain criteria are met, e.g. when a site
# manager logs into WordPress' backend.

# Admin sections for CMSs
if ($request_uri ~* "(/administrator|/wp-admin|/wp-login.php)") {
    set $CACHE_BYPASS_FOR_STATIC 1;
}

# Proxy cache settings
proxy_no_cache                 $CACHE_BYPASS_FOR_STATIC;
proxy_cache_bypass             $CACHE_BYPASS_FOR_STATIC;

proxy_cache                    engintron_static;
proxy_cache_background_update  on;
proxy_cache_key                "$host$request_uri";
proxy_cache_lock               on;
proxy_cache_methods            GET HEAD;
proxy_cache_min_uses           1;
proxy_cache_revalidate         on;
proxy_cache_use_stale          error timeout invalid_header updating http_429 http_500 http_502 http_503 http_504; # Additional options: http_403 http_404
proxy_cache_valid              200 10s;

# Allow rewriting HTTP headers for static assets
proxy_ignore_headers           Cache-Control Expires Set-Cookie Vary;
proxy_hide_header              Cache-Control;
proxy_hide_header              Expires;
proxy_hide_header              Pragma;
proxy_hide_header              Set-Cookie;
proxy_hide_header              Vary;

# Disable logging
access_log                     off;