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wp-cache-phase2.php
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<?php
/*
* WP Super Cache Phase 2 file.
* This file is included by the files wp-cache.php and wp-cache-phase1.php
* It has all the code for caching and serving requests.
*/
// phpcs:disable WordPress.WP.AlternativeFunctions.file_system_operations_is_writable -- TODO: Fix or determine for sure that these should not be fixed.
// phpcs:disable WordPress.WP.AlternativeFunctions.file_system_operations_fwrite -- TODO: Fix or determine for sure that these should not be fixed.
function gzip_accepted() {
if ( 1 == ini_get( 'zlib.output_compression' ) || 'on' == strtolower( ini_get( 'zlib.output_compression' ) ) ) { // don't compress WP-Cache data files when PHP is already doing it
return false;
}
if ( ! isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) || ( isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) && strpos( $_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip' ) === false ) ) {
return false;
}
return 'gzip';
}
function setup_blog_cache_dir() {
global $blog_cache_dir, $cache_path;
if ( false == @is_dir( $blog_cache_dir ) ) {
@mkdir( $cache_path . 'blogs' );
@mkdir( $blog_cache_dir );
}
if ( false == @is_dir( $blog_cache_dir . 'meta' ) ) {
@mkdir( $blog_cache_dir . 'meta' );
}
}
function get_wp_cache_key( $url = false ) {
global $wp_cache_request_uri, $wp_cache_gzip_encoding, $WPSC_HTTP_HOST;
if ( ! $url ) {
$url = $wp_cache_request_uri;
}
$server_port = isset( $_SERVER['SERVER_PORT'] ) ? intval( $_SERVER['SERVER_PORT'] ) : 0;
// Prepare a tag to include in the cache key if the request is anything other than text/html
$accept = wpsc_get_accept_header();
if ( $accept === 'text/html' ) {
$accept_tag = '';
} else {
$accept_tag = '-' . $accept;
}
return do_cacheaction(
'wp_cache_key',
// phpcs:ignore WordPress.NamingConventions.ValidVariableName.VariableNotSnakeCase
wp_cache_check_mobile( $WPSC_HTTP_HOST . $server_port . preg_replace( '/#.*$/', '', str_replace( '/index.php', '/', $url ) ) . $wp_cache_gzip_encoding . wp_cache_get_cookies_values() . '-' . wpsc_get_accept_header() . $accept_tag )
);
}
/**
* Parse a partial URL (only the path and query components).
*
* @param string $partial_uri - The path and query component of a URI to parse.
*/
function wpsc_parse_partial_url( $partial_uri ) {
global $WPSC_HTTP_HOST;
$scheme = wpsc_is_https() ? 'https://' : 'http://';
return parse_url( $scheme . $WPSC_HTTP_HOST . $partial_uri );
}
function wpsc_remove_tracking_params_from_uri( $uri ) {
global $wpsc_tracking_parameters, $wpsc_ignore_tracking_parameters;
if ( ! isset( $wpsc_ignore_tracking_parameters ) || ! $wpsc_ignore_tracking_parameters ) {
return $uri;
}
if ( ! isset( $wpsc_tracking_parameters ) || empty( $wpsc_tracking_parameters ) ) {
return $uri;
}
$parsed_url = wpsc_parse_partial_url( $uri );
$query = array();
if ( isset( $parsed_url['query'] ) ) {
parse_str( $parsed_url['query'], $query );
foreach ( $wpsc_tracking_parameters as $param_name ) {
unset( $query[ $param_name ] );
unset( $_GET[ $param_name ] );
}
}
$path = isset( $parsed_url['path'] ) ? $parsed_url['path'] : '';
$query = ! empty( $query ) ? '?' . http_build_query( $query ) : '';
if ( empty( $_GET ) ) {
$_SERVER['REQUEST_URI'] = strtok( $_SERVER['REQUEST_URI'], '?' );
}
if ( $uri !== $path . $query ) {
wp_cache_debug( 'Removed tracking parameters from URL. Returning ' . $path . $query );
}
return $path . $query;
}
function wp_super_cache_init() {
global $wp_cache_key, $key, $blogcacheid, $file_prefix, $blog_cache_dir, $meta_file, $cache_file, $cache_filename, $meta_pathname;
$wp_cache_key = get_wp_cache_key();
$key = $blogcacheid . md5( $wp_cache_key );
$wp_cache_key = $blogcacheid . $wp_cache_key;
$cache_filename = $file_prefix . $key . '.php';
$meta_file = $file_prefix . $key . '.php';
$cache_file = wpsc_get_realpath( $blog_cache_dir );
if ( $cache_file ) {
$cache_file .= '/' . $cache_filename;
}
$meta_pathname = wpsc_get_realpath( $blog_cache_dir . 'meta/' );
if ( $meta_pathname ) {
$meta_pathname .= '/' . $meta_file;
}
return compact( 'key', 'cache_filename', 'meta_file', 'cache_file', 'meta_pathname' );
}
function wp_cache_serve_cache_file() {
global $key, $blogcacheid, $wp_cache_request_uri, $file_prefix, $blog_cache_dir, $meta_file, $cache_file, $cache_filename, $meta_pathname, $wp_cache_gzip_encoding, $meta;
global $cache_compression, $wp_cache_slash_check, $wp_supercache_304, $wp_cache_home_path, $wp_cache_no_cache_for_get;
global $wp_cache_disable_utf8, $wp_cache_mfunc_enabled, $wpsc_served_header;
if ( wpsc_is_backend() ) {
wp_cache_debug( 'Not serving wp-admin requests.', 5 );
return false;
}
if ( $wp_cache_no_cache_for_get && wpsc_is_get_query() ) {
wp_cache_debug( 'Non empty GET request. Caching disabled on settings page. ' . wpsc_dump_get_request(), 1 );
return false;
}
if ( defined( 'WPSC_SERVE_DISABLED' ) ) {
wp_cache_debug( 'wp_cache_serve_cache_file: WPSC_SERVE_DISABLED defined. Not serving cached files.' );
return false;
}
if ( wpsc_get_accept_header() !== 'text/html' ) {
wp_cache_debug( 'wp_cache_serve_cache_file: visitor does not accept text/html. Not serving cached file.' );
return false;
}
extract( wp_super_cache_init() ); // $key, $cache_filename, $meta_file, $cache_file, $meta_pathname
// Look for wp-cache file + meta file for the current URL
// If we can't find them, we will look for supercache html files. These files don't have any meta data
// which is why the code below does more work setting up the headers, etc.
if (
! defined( 'WPSC_SUPERCACHE_ONLY' ) &&
(
( $cache_file && file_exists( $cache_file ) ) ||
file_exists( get_current_url_supercache_dir() . 'meta-' . $cache_filename )
)
) {
if ( file_exists( get_current_url_supercache_dir() . 'meta-' . $cache_filename ) ) {
$cache_file = get_current_url_supercache_dir() . $cache_filename;
$meta_pathname = get_current_url_supercache_dir() . 'meta-' . $cache_filename;
} elseif ( ! file_exists( $cache_file ) ) {
wp_cache_debug( 'wp_cache_serve_cache_file: found cache file but then it disappeared!' );
return false;
}
if ( ! $meta_pathname ) {
wp_cache_debug( 'wp_cache_serve_cache_file: meta pathname is empty. Could not load wp-cache meta file.' );
return true;
}
wp_cache_debug( "wp-cache file exists: $cache_file", 5 );
if ( ! ( $meta = json_decode( wp_cache_get_legacy_cache( $meta_pathname ), true ) ) ) {
wp_cache_debug( "couldn't load wp-cache meta file", 5 );
return true;
}
if ( is_array( $meta ) == false ) {
wp_cache_debug( "meta array corrupt, deleting $meta_pathname and $cache_file", 1 );
@unlink( $meta_pathname );
@unlink( $cache_file );
return true;
}
} else { // no wp-cache file, look for a supercache file
global $wpsc_save_headers;
global $cache_max_time;
// last chance, check if a supercache file exists. Just in case .htaccess rules don't work on this host
$file = get_current_url_supercache_dir() . supercache_filename();
if ( false == file_exists( $file ) ) {
wp_cache_debug( "No Super Cache file found for current URL: $file" );
return false;
} elseif ( wpsc_is_get_query() ) {
wp_cache_debug( 'GET array not empty. Cannot serve a supercache file. ' . wpsc_dump_get_request() );
return false;
} elseif ( wp_cache_get_cookies_values() != '' ) {
wp_cache_debug( 'Cookies found. Cannot serve a supercache file. ' . wp_cache_get_cookies_values() );
return false;
} elseif ( wpsc_get_accept_header() !== 'text/html' ) {
wp_cache_debug( 'Accept header is not text/html. Cannot serve supercache file.' . wp_cache_get_cookies_values() );
return false;
} elseif ( isset( $wpsc_save_headers ) && $wpsc_save_headers ) {
wp_cache_debug( 'Saving headers. Cannot serve a supercache file.' );
return false;
} elseif ( $cache_max_time > 0 && ( filemtime( $file ) + $cache_max_time ) < time() ) {
wp_cache_debug( sprintf( 'Cache has expired and is older than %d seconds old.', $cache_max_time ) );
return false;
}
if ( isset( $wp_cache_mfunc_enabled ) == false ) {
$wp_cache_mfunc_enabled = 0;
}
if ( false == isset( $wp_cache_home_path ) ) {
$wp_cache_home_path = '/';
}
// make sure ending slashes are ok
if ( $wp_cache_request_uri == $wp_cache_home_path || ( $wp_cache_slash_check && substr( $wp_cache_request_uri, -1 ) == '/' ) || ( $wp_cache_slash_check == 0 && substr( $wp_cache_request_uri, -1 ) != '/' ) ) {
if ( $wp_cache_mfunc_enabled == 0 ) {
// get data from file
if ( $wp_cache_gzip_encoding ) {
if ( file_exists( $file . '.gz' ) ) {
$cachefiledata = file_get_contents( $file . '.gz' );
if ( false === $cachefiledata ) {
wp_cache_debug( 'The cached gzip file could not be read. Must generate a new one.' );
return false;
}
wp_cache_debug( "Fetched gzip static page data from supercache file using PHP. File: $file.gz" );
} else {
$cachefiledata = file_get_contents( $file ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
if ( false === $cachefiledata ) {
wp_cache_debug( 'The cached file could not be read. Must generate a new one.' );
return false;
}
$cachefiledata = gzencode( $cachefiledata, 6, FORCE_GZIP );
wp_cache_debug( "Fetched static page data from supercache file using PHP and gzipped it. File: $file" );
}
} else {
$cachefiledata = file_get_contents( $file );
if ( false === $cachefiledata ) {
wp_cache_debug( 'The cached file could not be read. Must generate a new one.' );
return false;
}
wp_cache_debug( "Fetched static page data from supercache file using PHP. File: $file" );
}
} else {
// get dynamic data from filtered file
$cachefiledata = file_get_contents( $file ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
if ( false === $cachefiledata ) {
wp_cache_debug( 'The cached file could not be read. Must generate a new one.' );
return false;
}
$cachefiledata = do_cacheaction( 'wpsc_cachedata', $cachefiledata );
if ( $wp_cache_gzip_encoding ) {
$cachefiledata = gzencode( $cachefiledata, 6, FORCE_GZIP );
wp_cache_debug( "Fetched dynamic page data from supercache file using PHP and gzipped it. File: $file" );
} else {
wp_cache_debug( "Fetched dynamic page data from supercache file using PHP. File: $file" );
}
}
if ( isset( $wp_cache_disable_utf8 ) == false || $wp_cache_disable_utf8 == 0 ) {
header( 'Content-type: text/html; charset=UTF-8' );
}
if ( defined( 'WPSC_VARY_HEADER' ) ) {
if ( WPSC_VARY_HEADER != '' ) {
header( 'Vary: ' . WPSC_VARY_HEADER );
}
} else {
header( 'Vary: Accept-Encoding, Cookie' );
}
if ( defined( 'WPSC_CACHE_CONTROL_HEADER' ) ) {
if ( WPSC_CACHE_CONTROL_HEADER != '' ) {
header( 'Cache-Control: ' . WPSC_CACHE_CONTROL_HEADER );
}
} else {
header( 'Cache-Control: max-age=3, must-revalidate' );
}
$size = ( function_exists( 'mb_strlen' ) && function_exists( 'is_utf8_charset' ) ) ? mb_strlen( $cachefiledata, '8bit' ) : strlen( $cachefiledata );
if ( $wp_cache_gzip_encoding ) {
if ( isset( $wpsc_served_header ) && $wpsc_served_header ) {
header( 'X-WP-Super-Cache: Served supercache gzip file from PHP' );
}
header( 'Content-Encoding: ' . $wp_cache_gzip_encoding );
header( 'Content-Length: ' . $size );
} elseif ( $wp_supercache_304 ) {
if ( isset( $wpsc_served_header ) && $wpsc_served_header ) {
header( 'X-WP-Super-Cache: Served supercache 304 file from PHP' );
}
header( 'Content-Length: ' . $size );
} elseif ( isset( $wpsc_served_header ) && $wpsc_served_header ) {
header( 'X-WP-Super-Cache: Served supercache file from PHP' );
}
// don't try to match modified dates if using dynamic code.
if ( $wp_cache_mfunc_enabled == 0 && $wp_supercache_304 ) {
wp_cache_debug( 'wp_cache_serve_cache_file: checking age of cached vs served files.' );
$headers = wpsc_apache_request_headers();
$remote_mod_time = isset( $headers['If-Modified-Since'] ) ? $headers['If-Modified-Since'] : null;
if ( $remote_mod_time === null && isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
$remote_mod_time = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
}
$local_mod_time = gmdate( 'D, d M Y H:i:s', filemtime( $file ) ) . ' GMT';
if ( $remote_mod_time !== null && $remote_mod_time == $local_mod_time ) {
wp_cache_debug( 'wp_cache_serve_cache_file: Send 304 Not Modified header.' );
header( $_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified' );
exit();
} else {
wp_cache_debug( 'wp_cache_serve_cache_file: 304 browser caching not possible as timestamps differ.' );
}
header( 'Last-Modified: ' . $local_mod_time );
}
echo $cachefiledata;
exit();
} else {
wp_cache_debug( 'No wp-cache file exists. Must generate a new one.' );
return false;
}
}
$cache_file = do_cacheaction( 'wp_cache_served_cache_file', $cache_file );
// Sometimes the gzip headers are lost. Make sure html returned isn't compressed!
$do_not_serve_gzip_data = true;
if ( $cache_compression && $wp_cache_gzip_encoding ) {
if ( ! in_array( 'Content-Encoding: ' . $wp_cache_gzip_encoding, $meta['headers'], true ) ) {
wp_cache_debug( 'GZIP headers not found. Force uncompressed output.' );
} else {
$do_not_serve_gzip_data = false;
if ( isset( $meta['dynamic'] ) ) {
unset( $meta['headers']['Content-Length'] ); // this is set later after the output data is compressed
}
wp_cache_debug( 'GZIP headers found. Serving compressed output.' );
}
}
foreach ( $meta['headers'] as $t => $header ) {
// godaddy fix, via http://blog.gneu.org/2008/05/wp-supercache-on-godaddy/ and http://www.littleredrails.com/blog/2007/09/08/using-wp-cache-on-godaddy-500-error/
if ( strpos( $header, 'Last-Modified:' ) === false ) {
header( $header );
wp_cache_debug( 'Sending Header: ' . $header );
}
}
if ( isset( $wpsc_served_header ) && $wpsc_served_header ) {
header( 'X-WP-Super-Cache: Served WPCache cache file' );
}
if ( isset( $meta['dynamic'] ) ) {
wp_cache_debug( 'Serving wp-cache dynamic file', 5 );
if ( $do_not_serve_gzip_data ) {
// attempt to uncompress the cached file just in case it's gzipped
$cache = wp_cache_get_legacy_cache( $cache_file );
$uncompressed = @gzuncompress( $cache );
if ( $uncompressed ) {
wp_cache_debug( 'Uncompressed gzipped cache from wp-cache: ' . $cache_file );
$cache = $uncompressed;
unset( $uncompressed );
}
$cache = do_cacheaction( 'wpsc_cachedata', $cache );
} else {
wp_cache_debug( 'Compressed cache data from wp-cache: ' . $cache_file );
$cache = gzencode(
do_cacheaction(
'wpsc_cachedata',
wp_cache_get_legacy_cache( $cache_file )
),
6,
FORCE_GZIP
);
$size = ( function_exists( 'mb_strlen' ) && function_exists( 'is_utf8_charset' ) ) ? mb_strlen( $cache, '8bit' ) : strlen( $cache );
wp_cache_debug( 'Sending Header: Content-Length: ' . $size );
header( 'Content-Length: ' . $size );
}
} elseif ( $do_not_serve_gzip_data ) {
$cache = wp_cache_get_legacy_cache( $cache_file );
$uncompressed = @gzuncompress( $cache ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- there is a small chance the cache isn't gzipped despite being configured to be.
if ( $uncompressed ) {
$cache = $uncompressed;
unset( $uncompressed );
wp_cache_debug( 'Uncompressed gzipped cache data from wp-cache file: ' . $cache_file );
} else {
wp_cache_debug( 'Sending already uncompressed cache file from wp-cache to browser: ' . $cache_file );
}
} else {
wp_cache_debug( 'Sending wp-cache file to browser: ' . $cache_file );
$cache = wp_cache_get_legacy_cache( $cache_file );
}
// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- this is the cached version of the current page. It will have been escaped already.
echo $cache;
wp_cache_debug( 'exit request', 5 );
die();
}
function wp_cache_get_legacy_cache( $cache_file ) {
return substr( @file_get_contents( $cache_file ), 15 );
}
function wp_cache_postload() {
global $cache_enabled, $wp_super_cache_late_init;
global $wp_cache_request_uri;
if ( empty( $wp_cache_request_uri ) ) {
wp_cache_debug( 'wp_cache_postload: no request uri configured. Not running.' );
return false;
}
// have to sanitize here because formatting.php is loaded after wp_cache_request_uri is set
$wp_cache_request_uri = esc_url_raw( wp_unslash( $wp_cache_request_uri ) );
if ( ! $cache_enabled ) {
return true;
}
if ( isset( $wp_super_cache_late_init ) && true == $wp_super_cache_late_init ) {
wp_cache_debug( 'Supercache Late Init: add wp_cache_serve_cache_file to init', 3 );
add_action( 'init', 'wp_cache_late_loader', 9999 );
} else {
wp_super_cache_init();
wp_cache_phase2();
}
}
function wp_cache_late_loader() {
wp_cache_debug( 'Supercache Late Loader running on init', 3 );
wp_cache_serve_cache_file();
wp_cache_phase2();
}
function wpsc_get_auth_cookies() {
static $cached_cookies;
if ( isset( $cached_cookies ) && is_array( $cached_cookies ) ) {
return $cached_cookies;
}
$cookies = array_keys( $_COOKIE );
if ( empty( $cookies ) ) {
return array();
}
$auth_cookies = array();
$duplicate_cookies = array();
$wp_cookies = array(
'AUTH_COOKIE' => 'wordpress_',
'SECURE_AUTH_COOKIE' => 'wordpress_sec_',
'LOGGED_IN_COOKIE' => 'wordpress_logged_in_',
);
foreach ( $wp_cookies as $cookie_const => $cookie_prefix ) {
$cookie_key = strtolower( $cookie_const );
if ( defined( $cookie_const ) ) {
if ( in_array( constant( $cookie_const ), $cookies, true ) ) {
$auth_cookies[ $cookie_key ] = constant( $cookie_const );
}
continue;
}
$found_cookies = preg_grep( '`^' . preg_quote( $cookie_prefix, '`' ) . '([0-9a-f]+)$`', $cookies );
if ( count( $found_cookies ) === 1 ) {
$auth_cookies[ $cookie_key ] = reset( $found_cookies );
} elseif ( count( $found_cookies ) > 1 ) {
$duplicate_cookies = array_merge( $duplicate_cookies, $found_cookies );
$auth_cookies[ $cookie_key ] = $found_cookies;
}
}
$cookie_hash = defined( 'COOKIEHASH' ) ? COOKIEHASH : '';
$other_cookies = array(
'comment_cookie' => 'comment_author_',
'postpass_cookie' => 'wp-postpass_',
);
foreach ( $other_cookies as $cookie_key => $cookie_prefix ) {
if ( $cookie_hash ) {
if ( in_array( $cookie_prefix . $cookie_hash, $cookies, true ) ) {
$auth_cookies[ $cookie_key ] = $cookie_prefix . $cookie_hash;
}
continue;
}
$found_cookies = preg_grep( '`^' . preg_quote( $cookie_prefix, '`' ) . '([0-9a-f]+)$`', $cookies );
if ( count( $found_cookies ) === 1 ) {
$auth_cookies[ $cookie_key ] = reset( $found_cookies );
} elseif ( count( $found_cookies ) > 1 ) {
$duplicate_cookies = array_merge( $duplicate_cookies, $found_cookies );
$auth_cookies[ $cookie_key ] = $found_cookies;
}
}
if ( ! $duplicate_cookies ) {
$cached_cookies = $auth_cookies;
}
if ( empty( $auth_cookies ) ) {
wp_cache_debug( 'wpsc_get_auth_cookies: no auth cookies detected', 5 );
} elseif ( $duplicate_cookies ) {
wp_cache_debug( 'wpsc_get_auth_cookies: duplicate cookies detected( ' . implode( ', ', $duplicate_cookies ) . ' )', 5 );
} else {
wp_cache_debug( 'wpsc_get_auth_cookies: cookies detected: ' . implode( ', ', $auth_cookies ), 5 );
}
return $auth_cookies;
}
/**
* Returns a string containing a sanitized version of the Accept header.
* For now, this can only respond with `text/html` or `application/json` -
* used to differentiate between pages which may or may not be cacheable.
*/
function wpsc_get_accept_header() {
static $accept = 'N/A';
if ( $accept === 'N/A' ) {
$accept_headers = apply_filters( 'wpsc_accept_headers', array( 'application/json', 'application/activity+json', 'application/ld+json' ) );
$accept_headers = array_map( 'strtolower', $accept_headers );
// phpcs:ignore WordPress.NamingConventions.ValidVariableName.VariableNotSnakeCase
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash -- $accept is checked and set below.
$accept = isset( $_SERVER['HTTP_ACCEPT'] ) ? strtolower( filter_var( $_SERVER['HTTP_ACCEPT'] ) ) : '';
foreach ( $accept_headers as $header ) {
if ( str_contains( $accept, $header ) ) {
$accept = 'application/json';
}
}
if ( $accept !== 'application/json' ) {
$accept = 'text/html';
}
wp_cache_debug( 'ACCEPT: ' . $accept );
}
return $accept;
}
function wp_cache_get_cookies_values() {
global $wpsc_cookies;
static $string = '';
if ( $string != '' ) {
wp_cache_debug( "wp_cache_get_cookies_values: cached: $string" );
return $string;
}
if ( defined( 'COOKIEHASH' ) ) {
$cookiehash = preg_quote( constant( 'COOKIEHASH' ) );
} else {
$cookiehash = '';
}
$regex = "/^wp-postpass_$cookiehash|^comment_author_$cookiehash";
if ( defined( 'LOGGED_IN_COOKIE' ) ) {
$regex .= '|^' . preg_quote( constant( 'LOGGED_IN_COOKIE' ) );
} else {
$regex .= "|^wordpress_logged_in_$cookiehash";
}
$regex .= '/';
while ( $key = key( $_COOKIE ) ) {
if ( preg_match( $regex, $key ) ) {
wp_cache_debug( 'wp_cache_get_cookies_values: Login/postpass cookie detected' );
$string .= $_COOKIE[ $key ] . ',';
}
next( $_COOKIE );
}
reset( $_COOKIE );
// If you use this hook, make sure you update your .htaccess rules with the same conditions
$string = do_cacheaction( 'wp_cache_get_cookies_values', $string );
if (
isset( $wpsc_cookies ) &&
is_array( $wpsc_cookies ) &&
! empty( $wpsc_cookies )
) {
foreach ( $wpsc_cookies as $name ) {
if ( isset( $_COOKIE[ $name ] ) ) {
wp_cache_debug( "wp_cache_get_cookies_values - found extra cookie: $name" );
$string .= $name . '=' . $_COOKIE[ $name ] . ',';
}
}
}
if ( $string != '' ) {
$string = md5( $string );
}
wp_cache_debug( "wp_cache_get_cookies_values: return: $string", 5 );
return $string;
}
function add_cacheaction( $action, $func ) {
global $wp_supercache_actions;
$wp_supercache_actions[ $action ][] = $func;
}
function do_cacheaction( $action, $value = '' ) {
global $wp_supercache_actions;
if ( ! isset( $wp_supercache_actions ) || ! is_array( $wp_supercache_actions ) ) {
return $value;
}
if ( array_key_exists( $action, $wp_supercache_actions ) && is_array( $wp_supercache_actions[ $action ] ) ) {
$actions = $wp_supercache_actions[ $action ];
foreach ( $actions as $func ) {
$value = call_user_func_array( $func, array( $value ) );
}
}
return $value;
}
function wp_cache_mobile_group( $user_agent ) {
global $wp_cache_mobile_groups;
foreach ( (array) $wp_cache_mobile_groups as $name => $group ) {
foreach ( (array) $group as $browser ) {
$browser = trim( strtolower( $browser ) );
if ( $browser != '' && strstr( $user_agent, $browser ) ) {
return $browser;
}
}
}
return 'mobile';
}
// From https://wordpress.org/plugins/wordpress-mobile-edition/ by Alex King
function wp_cache_check_mobile( $cache_key ) {
global $wp_cache_mobile_enabled, $wp_cache_mobile_browsers, $wp_cache_mobile_prefixes;
if ( ! isset( $wp_cache_mobile_enabled ) || false == $wp_cache_mobile_enabled ) {
return $cache_key;
}
// a check of wp_is_mobile() should be added here, but if the Jetpack WPSC plugin
// is enabled, jetpack_is_mobile() is used through the wp_cache_check_mobile action.
wp_cache_debug( "wp_cache_check_mobile: $cache_key" );
// allow plugins to short circuit mobile check. Cookie, extra UA checks?
switch ( do_cacheaction( 'wp_cache_check_mobile', $cache_key ) ) {
case 'normal':
wp_cache_debug( 'wp_cache_check_mobile: desktop user agent detected by wp_cache_check_mobile action' );
return $cache_key;
break;
case 'mobile':
wp_cache_debug( 'wp_cache_check_mobile: mobile user agent detected by wp_cache_check_mobile action' );
return $cache_key . '-mobile';
break;
}
if ( ! isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
return $cache_key;
}
if ( do_cacheaction( 'disable_mobile_check', false ) ) {
wp_cache_debug( 'wp_cache_check_mobile: disable_mobile_check disabled mobile check' );
return $cache_key;
}
$browsers = explode( ',', $wp_cache_mobile_browsers );
$user_agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
foreach ( $browsers as $browser ) {
if ( strstr( $user_agent, trim( strtolower( $browser ) ) ) ) {
wp_cache_debug( 'mobile browser detected: ' . $browser );
return $cache_key . '-' . wp_cache_mobile_group( $user_agent );
}
}
if ( isset( $_SERVER['HTTP_X_WAP_PROFILE'] ) ) {
return $cache_key . '-' . $_SERVER['HTTP_X_WAP_PROFILE'];
}
if ( isset( $_SERVER['HTTP_PROFILE'] ) ) {
return $cache_key . '-' . $_SERVER['HTTP_PROFILE'];
}
if ( isset( $wp_cache_mobile_prefixes ) ) {
$browsers = explode( ',', $wp_cache_mobile_prefixes );
foreach ( $browsers as $browser_prefix ) {
if ( substr( $user_agent, 0, 4 ) == $browser_prefix ) {
wp_cache_debug( 'mobile browser (prefix) detected: ' . $browser_prefix );
return $cache_key . '-' . $browser_prefix;
}
}
}
$accept = isset( $_SERVER['HTTP_ACCEPT'] ) ? strtolower( $_SERVER['HTTP_ACCEPT'] ) : '';
if ( str_contains( $accept, 'wap' ) ) {
return $cache_key . '-' . 'wap';
}
if ( isset( $_SERVER['ALL_HTTP'] ) && strpos( strtolower( $_SERVER['ALL_HTTP'] ), 'operamini' ) !== false ) {
return $cache_key . '-' . 'operamini';
}
return $cache_key;
}
/**
* Add a log message to the file, if debugging is turned on
*
* @param $message string The message that should be added to the log
* @param $level int
*/
function wp_cache_debug( $message, $level = 1 ) {
global $wp_cache_debug_log, $cache_path, $wp_cache_debug_ip, $wp_super_cache_debug;
static $last_message = '';
if ( $last_message == $message ) {
return false;
}
$last_message = $message;
// If either of the debug or log globals aren't set, then we can stop
if ( ! isset( $wp_super_cache_debug )
|| ! isset( $wp_cache_debug_log ) ) {
return false;
}
// If either the debug or log globals are false or empty, we can stop
if ( $wp_super_cache_debug == false
|| $wp_cache_debug_log === '' ) {
return false;
}
// If the debug_ip has been set, but it doesn't match the ip of the requester
// then we can stop.
if ( isset( $wp_cache_debug_ip )
&& $wp_cache_debug_ip !== ''
&& ( ! isset( $_SERVER['REMOTE_ADDR'] ) || $wp_cache_debug_ip !== $_SERVER['REMOTE_ADDR'] ) ) {
return false;
}
// if cache path is gone, then don't log anything
if ( empty( $cache_path ) || ! is_dir( $cache_path ) ) {
return;
}
// Log message: Date URI Message
$log_message = date( 'H:i:s' ) . ' ' . getmypid() . " {$_SERVER['REQUEST_URI']} {$message}" . PHP_EOL;
// path to the log file in the cache folder
$log_file = $cache_path . str_replace( '/', '', str_replace( '..', '', $wp_cache_debug_log ) );
if ( ! file_exists( $log_file ) && function_exists( 'wpsc_create_debug_log' ) ) {
global $wp_cache_debug_username;
if ( ! isset( $wp_cache_debug_username ) ) {
$wp_cache_debug_username = '';
}
wpsc_create_debug_log( $wp_cache_debug_log, $wp_cache_debug_username );
}
error_log( $log_message, 3, $log_file );
}
function wpsc_dump_get_request() {
static $string;
if ( isset( $string ) ) {
return $string;
}
if ( function_exists( 'wp_json_encode' ) ) {
$string = wp_json_encode( $_GET );
} else {
$string = json_encode( $_GET );
}
return $string;
}
function wpsc_is_backend() {
static $is_backend;
if ( isset( $is_backend ) ) {
return $is_backend;
}
$is_backend = is_admin();
if ( $is_backend ) {
return $is_backend;
}
$script = isset( $_SERVER['PHP_SELF'] ) ? basename( $_SERVER['PHP_SELF'] ) : '';
if ( $script !== 'index.php' ) {
if ( in_array( $script, array( 'wp-login.php', 'xmlrpc.php', 'wp-cron.php' ) ) ) {
$is_backend = true;
} elseif ( defined( 'DOING_CRON' ) && DOING_CRON ) {
$is_backend = true;
} elseif ( PHP_SAPI == 'cli' || ( defined( 'WP_CLI' ) && WP_CLI ) ) {
$is_backend = true;
}
}
return $is_backend;
}
function get_supercache_dir( $blog_id = 0 ) {
global $cache_path;
if ( $blog_id == 0 ) {
$home = get_option( 'home' );
} else {
$home = get_blog_option( $blog_id, 'home' );
}
return trailingslashit( apply_filters( 'wp_super_cache_supercachedir', $cache_path . 'supercache/' . trailingslashit( strtolower( preg_replace( '/:.*$/', '', str_replace( 'http://', '', str_replace( 'https://', '', $home ) ) ) ) ) ) );
}
function get_current_url_supercache_dir( $post_id = 0 ) {
global $cached_direct_pages, $cache_path, $wp_cache_request_uri, $WPSC_HTTP_HOST, $wp_cache_home_path;
static $saved_supercache_dir = array();
if ( isset( $saved_supercache_dir[ $post_id ] ) ) {
return $saved_supercache_dir[ $post_id ];
}
$DONOTREMEMBER = 0;
if ( $post_id != 0 ) {
$site_url = site_url();
$permalink = get_permalink( $post_id );
if ( ! str_contains( $permalink, $site_url ) ) {
/*
* Sometimes site_url doesn't return the siteurl. See https://wordpress.org/support/topic/wp-super-cache-not-refreshing-post-after-comments-made
*/
$DONOTREMEMBER = 1;
wp_cache_debug( "get_current_url_supercache_dir: WARNING! site_url ($site_url) not found in permalink ($permalink).", 1 );
if ( preg_match( '`^(https?:)?//([^/]+)(/.*)?$`i', $permalink, $matches ) ) {
if ( $WPSC_HTTP_HOST != $matches[2] ) {
wp_cache_debug( "get_current_url_supercache_dir: WARNING! SERVER_NAME ({$WPSC_HTTP_HOST}) not found in permalink ($permalink).", 1 );
}
wp_cache_debug( "get_current_url_supercache_dir: Removing SERVER_NAME ({$matches[2]}) from permalink ($permalink). Is the url right?", 1 );
$uri = isset( $matches[3] ) ? $matches[3] : '';
} elseif ( preg_match( '`^/([^/]+)(/.*)?$`i', $permalink, $matches ) ) {
wp_cache_debug( "get_current_url_supercache_dir: WARNING! Permalink ($permalink) looks as absolute path. Is the url right?", 1 );
$uri = $permalink;
} else {
wp_cache_debug( "get_current_url_supercache_dir: WARNING! Permalink ($permalink) could not be understood by parsing url. Using front page.", 1 );
$uri = '';
}
} else {
$uri = str_replace( $site_url, '', $permalink );
if ( ! str_starts_with( $uri, $wp_cache_home_path ) ) {
$uri = rtrim( $wp_cache_home_path, '/' ) . $uri;
}
}
} else {
$uri = strtolower( $wp_cache_request_uri );
$uri = preg_replace_callback(
'/%[a-f0-9]{2}/',
function ( $matches ) {
return strtoupper( $matches[0] );
},
$uri
);
}
$uri = wpsc_deep_replace( array( '..', '\\', 'index.php' ), preg_replace( '/[ <>\'\"\r\n\t\(\)]/', '', preg_replace( '/(\?.*)?(#.*)?$/', '', $uri ) ) );
$hostname = $WPSC_HTTP_HOST;
// Get hostname from wp options for wp-cron, wp-cli and similar requests.
if ( empty( $hostname ) && function_exists( 'get_option' ) ) {
$hostname = (string) parse_url( get_option( 'home' ), PHP_URL_HOST );
}
$dir = preg_replace( '/:.*$/', '', $hostname ) . $uri; // To avoid XSS attacks
if ( function_exists( 'apply_filters' ) ) {
$dir = apply_filters( 'supercache_dir', $dir );
} else {
$dir = do_cacheaction( 'supercache_dir', $dir );
}
$dir = $cache_path . 'supercache/' . $dir . '/';
if ( is_array( $cached_direct_pages ) && in_array( $_SERVER['REQUEST_URI'], $cached_direct_pages ) ) {
$dir = ABSPATH . $uri . '/';
}
$dir = str_replace( '..', '', str_replace( '//', '/', $dir ) );
wp_cache_debug( "supercache dir: $dir", 5 );
if ( $DONOTREMEMBER == 0 ) {
$saved_supercache_dir[ $post_id ] = $dir;
}
return $dir;
}
/*
* Delete (or rebuild) all the files in one directory.
* Checks if it is in the cache directory but doesn't allow files in the following directories to be deleted:
* wp-content/cache/
* wp-content/cache/blogs/
* wp-content/cache/supercache/
*
*/
function wpsc_rebuild_files( $dir ) {
return wpsc_delete_files( $dir, false );
}
// realpath() doesn't always remove the trailing slash
function wpsc_get_realpath( $directory ) {
if ( $directory == '/' ) {
wp_cache_debug( "wpsc_get_realpath: cannot get realpath of '/'" );
return false;
}
$original_dir = $directory;
$directory = realpath( $directory );
if ( ! $directory ) {
wp_cache_debug( "wpsc_get_realpath: directory does not exist - $original_dir" );
return false;
}
if ( substr( $directory, -1 ) == '/' || substr( $directory, -1 ) == '\\' ) {
$directory = substr( $directory, 0, -1 ); // remove trailing slash
}
return $directory;
}
// return true if directory is in the cache directory
function wpsc_is_in_cache_directory( $directory ) {
global $cache_path;
static $rp_cache_path = '';
if ( $directory == '' ) {
wp_cache_debug( 'wpsc_is_in_cache_directory: exiting as directory is blank' );
return false;
}
if ( $cache_path == '' ) {
wp_cache_debug( 'wpsc_is_in_cache_directory: exiting as cache_path is blank' );
return false;
}
if ( $rp_cache_path == '' ) {
$rp_cache_path = wpsc_get_realpath( $cache_path );
}
if ( ! $rp_cache_path ) {
wp_cache_debug( 'wpsc_is_in_cache_directory: exiting as cache_path directory does not exist' );
return false;
}
$directory = wpsc_get_realpath( $directory );
if ( ! $directory ) {
wp_cache_debug( 'wpsc_is_in_cache_directory: directory does not exist' );
return false;
}
if ( substr( $directory, 0, strlen( $rp_cache_path ) ) == $rp_cache_path ) {
return true;
} else {
return false;
}
}
function wpsc_delete_files( $dir, $delete = true ) {
global $cache_path;
static $protected = '';
if ( $dir == '' ) {
wp_cache_debug( 'wpsc_delete_files: directory is blank' );
return false;
}
wp_cache_debug( 'wpsc_delete_files: deleting ' . $dir );
// only do this once, this function will be called many times
if ( $protected == '' ) {
$protected = array( $cache_path, $cache_path . 'blogs/', $cache_path . 'supercache' );
foreach ( $protected as $id => $directory ) {
$protected[ $id ] = trailingslashit( wpsc_get_realpath( $directory ) );
}
}
$orig_dir = $dir;
$dir = wpsc_get_realpath( $dir );
if ( ! $dir ) {
wp_cache_debug( 'wpsc_delete_files: directory does not exist: ' . $orig_dir );
return false;
}
$dir = trailingslashit( $dir );
if ( ! wpsc_is_in_cache_directory( $dir ) ) {
wp_cache_debug( 'wpsc_delete_files: directory is not in cache directory: ' . $dir );
return false;
}
if ( in_array( $dir, $protected ) ) {