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<?php |
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|
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if (!defined('ABSPATH')) die('No direct access allowed'); |
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|
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/** |
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* File based page cache drop in |
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*/ |
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require_once(dirname(__FILE__) . '/file-based-page-cache-functions.php'); |
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|
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if (!defined('WPO_CACHE_DIR')) define('WPO_CACHE_DIR', untrailingslashit(WP_CONTENT_DIR) . '/wpo-cache'); |
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|
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if (wpo_is_activity_stream_requested()) return; |
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if (wpo_is_robots_txt_requested()) return; |
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|
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// Fix for compatibility issue with Jetpack's infinity scroll feature |
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if (isset($_GET['infinity']) && 'scrolling' === $_GET['infinity']) return; |
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|
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/** |
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* Load extensions. |
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*/ |
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wpo_cache_load_extensions(); |
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|
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/** |
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* Action triggered when the cache extensions are all loaded. Allows to execute code depending on an other extension, without knowing the order in which the files are loaded. |
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*/ |
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if (function_exists('do_action')) { |
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do_action('wpo_cache_extensions_loaded'); |
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} |
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|
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$no_cache_because = array(); |
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|
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// check if we want to cache current page. |
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if (function_exists('add_filter') && function_exists('apply_filters')) { |
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add_filter('wpo_restricted_cache_page_type', 'wpo_restricted_cache_page_type'); |
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add_filter('wpo_url_in_conditional_tags_exceptions', 'wpo_url_in_conditional_tags_exceptions'); |
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$restricted_cache_page_type = apply_filters('wpo_restricted_cache_page_type', false); |
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$conditional_tag_exceptions = wpo_url_in_conditional_tags_exceptions(); |
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} else { |
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// On old WP versions, you can't filter the result |
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$restricted_cache_page_type = wpo_restricted_cache_page_type(false); |
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$conditional_tag_exceptions = wpo_url_in_conditional_tags_exceptions(); |
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} |
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|
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if ($restricted_cache_page_type) { |
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$no_cache_because[] = $restricted_cache_page_type; |
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} |
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|
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if ($conditional_tag_exceptions) { |
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$no_cache_because[] = $conditional_tag_exceptions; |
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} |
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|
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// Don't cache non-GET requests. |
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$is_cache_page_forced = function_exists('apply_filters') ? apply_filters('wpo_cache_page_force', false) : false; |
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$is_get_request = isset($_SERVER['REQUEST_METHOD']) && 'GET' === $_SERVER['REQUEST_METHOD']; |
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|
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if (!$is_cache_page_forced && !$is_get_request) { |
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$no_cache_because[] = 'The request method was not GET ('.(isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : '-').')'; |
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} |
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|
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$file_extension = $_SERVER['REQUEST_URI']; |
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$file_extension = preg_replace('#^(.*?)\?.*$#', '$1', $file_extension); |
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$file_extension = trim(preg_replace('#^.*\.(.*)$#', '$1', $file_extension)); |
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|
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// Don't cache disallowed extensions. Prevents wp-cron.php, xmlrpc.php, etc. |
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if (!preg_match('#index\.php$#i', $_SERVER['REQUEST_URI']) && preg_match('#sitemap([a-zA-Z0-9_-]+)?\.xml$#i', $_SERVER['REQUEST_URI']) && in_array($file_extension, array('php', 'xml', 'xsl'))) { |
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$no_cache_because[] = 'The request extension is not suitable for caching'; |
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} |
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|
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// Don't cache if logged in. |
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if (!empty($_COOKIE)) { |
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$wp_cookies = array('wordpressuser_', 'wordpresspass_', 'wordpress_sec_', 'wordpress_logged_in_'); |
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|
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if (!wpo_cache_loggedin_users()) { |
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foreach ($_COOKIE as $key => $value) { |
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foreach ($wp_cookies as $cookie) { |
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if (false !== strpos($key, $cookie)) { |
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$no_cache_because[] = 'WordPress login cookies were detected'; |
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break(2); |
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} |
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} |
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} |
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} |
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|
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if (!empty($_COOKIE['wpo_commented_post'])) { |
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$no_cache_because[] = 'The user has commented on a post (comment cookie set)'; |
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} |
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|
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// get cookie exceptions from options. |
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$cache_exception_cookies = !empty($GLOBALS['wpo_cache_config']['cache_exception_cookies']) ? $GLOBALS['wpo_cache_config']['cache_exception_cookies'] : array(); |
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// filter cookie exceptions, since WP 4.6 |
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$cache_exception_cookies = function_exists('apply_filters') ? apply_filters('wpo_cache_exception_cookies', $cache_exception_cookies) : $cache_exception_cookies; |
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|
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// check if any cookie exists from exception list. |
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if (!empty($cache_exception_cookies)) { |
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foreach ($_COOKIE as $key => $value) { |
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foreach ($cache_exception_cookies as $cookie) { |
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if ('' != trim($cookie) && false !== strpos($key, $cookie)) { |
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$no_cache_because[] = 'An excepted cookie was set ('.$key.')'; |
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break 2; |
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} |
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} |
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} |
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} |
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} |
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|
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// check in not disabled current user agent |
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if (!empty($_SERVER['HTTP_USER_AGENT']) && false === wpo_is_accepted_user_agent($_SERVER['HTTP_USER_AGENT'])) { |
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$no_cache_because[] = "In the settings, caching is disabled for matches for this request's user agent"; |
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} |
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|
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// Deal with optional cache exceptions. |
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if (wpo_url_in_exceptions(wpo_current_url())) { |
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$no_cache_because[] = 'In the settings, caching is disabled for matches for the current URL'; |
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} |
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|
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if (!empty($_GET)) { |
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// get variables used for building filename. |
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$get_variable_names = wpo_cache_query_variables(); |
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|
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$get_variables = wpo_cache_maybe_ignore_query_variables(array_keys($_GET)); |
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|
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// if GET variables include one or more undefined variable names then we don't cache. |
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$get_variables_diff = array_diff($get_variables, $get_variable_names); |
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if (!empty($get_variables_diff)) { |
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$no_cache_because[] = "In the settings, caching is disabled for matches for one of the current request's GET parameters"; |
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} |
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} |
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|
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if (!empty($no_cache_because)) { |
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$no_cache_because_message = implode(', ', $no_cache_because); |
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|
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// Add http header |
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if (!defined('DOING_CRON') || !DOING_CRON) { |
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wpo_cache_add_nocache_http_header_with_send_headers_action($no_cache_because_message); |
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} |
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|
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if ((!defined('DOING_CRON') || !DOING_CRON)) { |
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$not_cached_details = ""; |
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|
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// Output the reason only when the user has turned on debugging |
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if (((defined('WP_DEBUG') && WP_DEBUG) || isset($_GET['wpo_cache_debug']))) { |
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$not_cached_details = "because: ".htmlspecialchars($no_cache_because_message); |
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} |
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wpo_cache_add_footer_output(sprintf("Page not served from cache %s", $not_cached_details)); |
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} |
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return; |
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} |
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|
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wpo_serve_cache(); |
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|
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ob_start('wpo_cache'); |
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|
