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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
#  */

# === MICRO CACHING ===
# 1 second (1s) micro-caching enabled for all proxied dynamic HTML content
# If you wish to have longer cache times, change the "proxy_cache_valid"
# line from "1s" to whatever time you want (e.g. "30s" or "1m").
# This cache is turned off when certain criteria are met, e.g. when a site
# manager logs into WordPress' backend/admin section.

#############################################################################################
# ADVANCED USERS ONLY:
# This setting is for cPanel servers with only one to a few sites & NO user-generated content
# in the frontend (no forums, no e-commerce sites, no user logins!) - you have been warned!
# Use the time defined in "$EXPIRES_FOR_DYNAMIC" to force client-side caching on dynamic content
# (set to 1m by default). To enable, uncomment all lines located at the bottom of this file.
# You can also raise "proxy_cache_valid" to the same value (e.g. "1m") to force longer
# server-side caching.
# The combination of these settings will have Nginx serve all content without issuing requests
# to Apache except only when it's required to refresh its cache.

set $EXPIRES_FOR_DYNAMIC 1m;

#############################################################################################

# Allow separate cache entries for mobile devices (smartphones & tables)
set $MOBILE "";
if ($http_user_agent ~* "(iPhone|iPod|iPad|Android|Mobile|Tablet)") {
    set $MOBILE "m_";
}

# CMS (& CMS extension) specific cookies (e.g. Joomla, K2 for Joomla, WordPress, WooCommerce, PrestaShop, Magento etc.)
if ($http_cookie ~* "(joomla_[a-zA-Z0-9_]+|userID|wordpress_(?!test_)[a-zA-Z0-9_]+|wp-postpass|comment_author_[a-zA-Z0-9_]+|woocommerce_cart_hash|woocommerce_items_in_cart|wp_woocommerce_session_[a-zA-Z0-9]+|sid_customer_|sid_admin_|PrestaShop-[a-zA-Z0-9]+|SESS[a-zA-Z0-9]+|SSESS[a-zA-Z0-9]+|NO_CACHE|external_no_cache|adminhtml|private_content_version)") {
    set $CACHE_BYPASS_FOR_DYNAMIC 1;
    set $EXPIRES_FOR_DYNAMIC 0;
}

# Invision Power Board (IPB) v3+
if ($cookie_member_id ~ "^[1-9][0-9]*$") {
    set $CACHE_BYPASS_FOR_DYNAMIC 1;
    set $EXPIRES_FOR_DYNAMIC 0;
}

# Invision Power Board (IPB) v4+
if ($cookie_ips4_member_id ~ "^[1-9][0-9]*$") {
    set $CACHE_BYPASS_FOR_DYNAMIC 1;
    set $EXPIRES_FOR_DYNAMIC 0;
}
if ($http_cookie ~ "ips4_IPSSessionFront") {
    set $CACHE_BYPASS_FOR_DYNAMIC 1;
    set $EXPIRES_FOR_DYNAMIC 0;
}

# Admin sections & generic entry points for CMSs (incl. Joomla, WordPress, phpBB, Drupal, Craft)
if ($request_uri ~* "(/administrator|com_user|com_users|com_contact|com_mailto|/component/user|/component/users|/component/contact|/component/mailto|/installation|/wp-admin|/wp-login.php|/cart|/my-account|/checkout|/wc-api|/addons|/lost-password|\?add-to-cart=|\?wc-api=|/ucp.php|^/status\.php|^/update\.php|^/install\.php|^/apc\.php$|^/apcu\.php$|^/admin|^/admin/.*$|^/user|^/user/.*$|^/users/.*$|^/info/.*$|^/flag/.*$|^.*/ajax/.*$|^.*/ahah/.*$|^/system/files/.*$|p=admin|/actions|/login|/logout|/connect|/signin|/signup|/register)") {
    set $CACHE_BYPASS_FOR_DYNAMIC 1;
    set $EXPIRES_FOR_DYNAMIC 0;
}

# Disable caching when the "Cache-Control" header is set to "private"
if ($http_cache_control ~* "private") {
    set $CACHE_BYPASS_FOR_DYNAMIC 1;
    set $EXPIRES_FOR_DYNAMIC 0;
}

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

proxy_cache                    engintron_dynamic;
#proxy_cache_background_update on;
proxy_cache_key                "$MOBILE$scheme$host$request_uri";
proxy_cache_lock               on;
proxy_cache_methods            GET HEAD;
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 1s;

# Ignore all headers but "Cache-Control" to determine whether to cache the upstream response or not
proxy_ignore_headers           Expires Set-Cookie Vary;

# Force client-side caching for dynamic content (commented by default)
# See "ADVANCED USERS ONLY" note at the top of this file
#expires                       $EXPIRES_FOR_DYNAMIC;
#proxy_hide_header             Cache-Control;
#proxy_hide_header             Expires;
#proxy_hide_header             Pragma;
#proxy_hide_header             Set-Cookie;
proxy_hide_header              Vary;