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wp-cache-phase2.php
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<?php
function wp_cache_phase2() {
global $cache_filename, $cache_acceptable_files, $wp_cache_gzip_encoding, $super_cache_enabled, $cache_rebuild_files, $wp_cache_last_gc;
global $cache_max_time, $wp_cache_request_uri, $super_cache_enabled, $wp_cache_object_cache, $cache_time_interval;
global $cache_enabled, $wp_cache_gmt_offset, $wp_cache_blog_charset, $cache_schedule_type, $cache_scheduled_time, $cache_schedule_interval;
if ( $cache_enabled == false ) {
wp_cache_debug( "Caching disabled! quiting!", 1 );
return false;
}
wp_cache_debug( 'In WP Cache Phase 2', 5 );
$wp_cache_gmt_offset = get_option( 'gmt_offset' ); // caching for later use when wpdb is gone. http://wordpress.org/support/topic/224349
$wp_cache_blog_charset = get_option( 'blog_charset' );
wp_cache_mutex_init();
if(function_exists('add_action') && ( !defined( 'WPLOCKDOWN' ) || ( defined( 'WPLOCKDOWN' ) && constant( 'WPLOCKDOWN' ) == '0' ) ) ) {
wp_cache_debug( 'Setting up WordPress actions', 5 );
add_action( 'template_redirect', 'wp_super_cache_query_vars' );
// Post ID is received
add_action('wp_trash_post', 'wp_cache_post_edit', 0);
add_action('publish_post', 'wp_cache_post_edit', 0);
add_action('edit_post', 'wp_cache_post_change', 0); // leaving a comment called edit_post
add_action('delete_post', 'wp_cache_post_edit', 0);
add_action('publish_phone', 'wp_cache_post_edit', 0);
// Coment ID is received
add_action('trackback_post', 'wp_cache_get_postid_from_comment', 99);
add_action('pingback_post', 'wp_cache_get_postid_from_comment', 99);
add_action('comment_post', 'wp_cache_get_postid_from_comment', 99);
add_action('edit_comment', 'wp_cache_get_postid_from_comment', 99);
add_action('wp_set_comment_status', 'wp_cache_get_postid_from_comment', 99, 2);
// No post_id is available
add_action('switch_theme', 'wp_cache_no_postid', 99);
add_action('edit_user_profile_update', 'wp_cache_no_postid', 99);
add_action( 'wp_update_nav_menu', 'wp_cache_clear_cache_on_menu' );
add_action('wp_cache_gc','wp_cache_gc_cron');
add_action( 'clean_post_cache', 'wp_cache_post_edit' );
add_filter( 'supercache_filename_str', 'wp_cache_check_mobile' );
add_action( 'wp_cache_gc_watcher', 'wp_cache_gc_watcher' );
add_action( 'transition_post_status', 'wpsc_post_transition', 10, 3 );
do_cacheaction( 'add_cacheaction' );
}
if ( is_admin() ) {
wp_cache_debug( 'Not caching wp-admin requests.', 5 );
return false;
}
if ( !empty( $_GET ) && !defined( "DOING_CRON" ) ) {
wp_cache_debug( 'Supercache caching disabled. Only using wp-cache. Non empty GET request. ' . json_encode( $_GET ), 5 );
$super_cache_enabled = false;
}
if($wp_cache_gzip_encoding)
header('Vary: Accept-Encoding, Cookie');
else
header('Vary: Cookie');
ob_start( 'wp_cache_ob_callback' );
wp_cache_debug( 'Created output buffer', 4 );
// restore old supercache file temporarily
if( $super_cache_enabled && $cache_rebuild_files ) {
$user_info = wp_cache_get_cookies_values();
$do_cache = apply_filters( 'do_createsupercache', $user_info );
if( $user_info == '' || $do_cache === true )
wpcache_do_rebuild( get_current_url_supercache_dir() );
}
schedule_wp_gc();
}
function wpcache_do_rebuild( $dir ) {
global $do_rebuild_list;
$dir = trailingslashit( $dir );
if ( isset( $do_rebuild_list[ $dir ] ) )
return false;
$do_rebuild_list[ $dir ] = 1;
$files_to_check = get_all_supercache_filenames( $dir );
foreach( $files_to_check as $cache_file ) {
$cache_file = $dir . $cache_file;
if( !@file_exists( $cache_file . '.needs-rebuild' ) )
continue;
$mtime = @filemtime($cache_file . '.needs-rebuild');
if( $mtime && (time() - $mtime) < 10 ) {
wp_cache_debug( "Rebuild file renamed to cache file temporarily: $cache_file", 3 );
@rename( $cache_file . '.needs-rebuild', $cache_file );
}
// cleanup old files or if rename fails
if( @file_exists( $cache_file . '.needs-rebuild' ) ) {
wp_cache_debug( "Rebuild file deleted: {$cache_file}.needs-rebuild", 3 );
@unlink( $cache_file . '.needs-rebuild' );
}
}
}
function wpcache_logged_in_message() {
echo '<!-- WP Super Cache did not cache this page because you are logged in and "Don\'t cache pages for logged in users" is enabled. -->';
}
if ( !function_exists( 'wp_cache_user_agent_is_rejected' ) ) {
function wp_cache_user_agent_is_rejected() {
global $cache_rejected_user_agent;
if (!function_exists('apache_request_headers')) return false;
$headers = apache_request_headers();
if (!isset($headers["User-Agent"])) return false;
if ( false == is_array( $cache_rejected_user_agent ) )
return false;
foreach ($cache_rejected_user_agent as $expr) {
if (strlen($expr) > 0 && stristr($headers["User-Agent"], $expr))
return true;
}
return false;
}
}
function wp_cache_get_response_headers() {
if(function_exists('apache_response_headers')) {
flush();
$headers = apache_response_headers();
} else if(function_exists('headers_list')) {
$headers = array();
foreach(headers_list() as $hdr) {
$header_parts = explode( ':', $hdr, 2 );
$header_name = isset( $header_parts[0] ) ? trim( $header_parts[0] ) : '';
$header_value = isset( $header_parts[1] ) ? trim( $header_parts[1] ) : '';
$headers[$header_name] = $header_value;
}
} else
$headers = null;
return $headers;
}
function wp_cache_is_rejected($uri) {
global $cache_rejected_uri;
$auto_rejected = array( '/wp-admin/', 'xmlrpc.php', 'wp-app.php' );
foreach( $auto_rejected as $u ) {
if( strstr( $uri, $u ) )
return true; // we don't allow caching of wp-admin for security reasons
}
if ( false == is_array( $cache_rejected_uri ) )
return false;
foreach ( $cache_rejected_uri as $expr ) {
if( $expr != '' && @preg_match( "~$expr~", $uri ) )
return true;
}
return false;
}
function wp_cache_mutex_init() {
global $mutex, $wp_cache_mutex_disabled, $use_flock, $blog_cache_dir, $mutex_filename, $sem_id;
if( isset( $wp_cache_mutex_disabled) && $wp_cache_mutex_disabled )
return true;
if( !is_bool( $use_flock ) ) {
if(function_exists('sem_get'))
$use_flock = false;
else
$use_flock = true;
}
$mutex = false;
if ($use_flock ) {
setup_blog_cache_dir();
wp_cache_debug( "Created mutex lock on filename: {$blog_cache_dir}{$mutex_filename}", 5 );
$mutex = @fopen( $blog_cache_dir . $mutex_filename, 'w' );
} else {
wp_cache_debug( "Created mutex lock on semaphore: {$sem_id}", 5 );
$mutex = @sem_get( $sem_id, 1, 0644 | IPC_CREAT, 1 );
}
}
function wp_cache_writers_entry() {
global $mutex, $wp_cache_mutex_disabled, $use_flock;
if( isset( $wp_cache_mutex_disabled ) && $wp_cache_mutex_disabled )
return true;
if( !$mutex ) {
wp_cache_debug( "(writers entry) mutex lock not created. not caching.", 2 );
return false;
}
if ( $use_flock ) {
wp_cache_debug( "grabbing lock using flock()", 5 );
flock($mutex, LOCK_EX);
} else {
wp_cache_debug( "grabbing lock using sem_acquire()", 5 );
sem_acquire($mutex);
}
return true;
}
function wp_cache_writers_exit() {
global $mutex, $wp_cache_mutex_disabled, $use_flock;
if( isset( $wp_cache_mutex_disabled ) && $wp_cache_mutex_disabled )
return true;
if( !$mutex ) {
wp_cache_debug( "(writers exit) mutex lock not created. not caching.", 2 );
return false;
}
if ( $use_flock ) {
wp_cache_debug( "releasing lock using flock()", 5 );
flock( $mutex, LOCK_UN );
} else {
wp_cache_debug( "releasing lock using sem_release() and sem_remove()", 5 );
sem_release( $mutex );
sem_remove( $mutex );
}
}
function wp_super_cache_query_vars() {
global $wp_super_cache_query;
if ( is_search() )
$wp_super_cache_query[ 'is_search' ] = 1;
if ( is_page() )
$wp_super_cache_query[ 'is_page' ] = 1;
if ( is_archive() )
$wp_super_cache_query[ 'is_archive' ] = 1;
if ( is_tag() )
$wp_super_cache_query[ 'is_tag' ] = 1;
if ( is_single() )
$wp_super_cache_query[ 'is_single' ] = 1;
if ( is_category() )
$wp_super_cache_query[ 'is_category' ] = 1;
if ( is_front_page() )
$wp_super_cache_query[ 'is_front_page' ] = 1;
if ( is_home() )
$wp_super_cache_query[ 'is_home' ] = 1;
if ( is_author() )
$wp_super_cache_query[ 'is_author' ] = 1;
if ( is_feed() )
$wp_super_cache_query[ 'is_feed' ] = 1;
}
function wp_cache_ob_callback( $buffer ) {
global $wp_cache_pages, $wp_query, $wp_super_cache_query, $cache_acceptable_files, $wp_cache_no_cache_for_get, $wp_cache_object_cache, $wp_cache_request_uri, $do_rebuild_list;
$buffer = apply_filters( 'wp_cache_ob_callback_filter', $buffer );
$script = basename($_SERVER['PHP_SELF']);
// All the things that can stop a page being cached
$cache_this_page = true;
if ( defined( 'DONOTCACHEPAGE' ) ) {
wp_cache_debug( 'DONOTCACHEPAGE defined. Caching disabled.', 2 );
$cache_this_page = false;
} elseif ( $wp_cache_no_cache_for_get && false == empty( $_GET ) && false == defined( 'DOING_CRON' ) ) {
wp_cache_debug( "Non empty GET request. Caching disabled on settings page. " . json_encode( $_GET ), 1 );
$cache_this_page = false;
} elseif ( $_SERVER["REQUEST_METHOD"] == 'POST' || !empty( $_POST ) || get_option( 'gzipcompression' ) ) {
wp_cache_debug( 'Not caching POST request.', 5 );
$cache_this_page = false;
} elseif ( $_SERVER["REQUEST_METHOD"] == 'PUT' ) {
wp_cache_debug( 'Not caching PUT request.', 5 );
$cache_this_page = false;
} elseif ( $_SERVER["REQUEST_METHOD"] == 'DELETE' ) {
wp_cache_debug( 'Not caching DELETE request.', 5 );
$cache_this_page = false;
} elseif ( $wp_cache_object_cache && !empty( $_GET ) ) {
wp_cache_debug( 'Not caching GET request while object cache storage enabled.', 5 );
$cache_this_page = false;
} elseif ( isset( $_GET[ 'preview' ] ) ) {
wp_cache_debug( 'Not caching preview post.', 2 );
$cache_this_page = false;
} elseif ( !in_array($script, $cache_acceptable_files) && wp_cache_is_rejected( $wp_cache_request_uri ) ) {
wp_cache_debug( 'URI rejected. Not Caching', 2 );
$cache_this_page = false;
} elseif ( wp_cache_user_agent_is_rejected() ) {
wp_cache_debug( "USER AGENT ({$_SERVER[ 'HTTP_USER_AGENT' ]}) rejected. Not Caching", 4 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'single' ] ) && $wp_cache_pages[ 'single' ] == 1 && isset( $wp_super_cache_query[ 'is_single' ] ) ) {
wp_cache_debug( 'Not caching single post.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'pages' ] ) && $wp_cache_pages[ 'pages' ] == 1 && isset( $wp_super_cache_query[ 'is_page' ] ) ) {
wp_cache_debug( 'Not caching single page.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'archives' ] ) && $wp_cache_pages[ 'archives' ] == 1 && isset( $wp_super_cache_query[ 'is_archive' ] ) ) {
wp_cache_debug( 'Not caching archive page.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'tag' ] ) && $wp_cache_pages[ 'tag' ] == 1 && isset( $wp_super_cache_query[ 'is_tag' ] ) ) {
wp_cache_debug( 'Not caching tag page.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'category' ] ) && $wp_cache_pages[ 'category' ] == 1 && isset( $wp_super_cache_query[ 'is_category' ] ) ) {
wp_cache_debug( 'Not caching category page.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'frontpage' ] ) && $wp_cache_pages[ 'frontpage' ] == 1 && isset( $wp_super_cache_query[ 'is_front_page' ] ) ) {
wp_cache_debug( 'Not caching front page.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'home' ] ) && $wp_cache_pages[ 'home' ] == 1 && isset( $wp_super_cache_query[ 'is_home' ] ) ) {
wp_cache_debug( 'Not caching home page.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'search' ] ) && $wp_cache_pages[ 'search' ] == 1 && isset( $wp_super_cache_query[ 'is_search' ] ) ) {
wp_cache_debug( 'Not caching search page.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'author' ] ) && $wp_cache_pages[ 'author' ] == 1 && isset( $wp_super_cache_query[ 'is_author' ] ) ) {
wp_cache_debug( 'Not caching author page.', 2 );
$cache_this_page = false;
} elseif ( isset( $wp_cache_pages[ 'feed' ] ) && $wp_cache_pages[ 'feed' ] == 1 && isset( $wp_super_cache_query[ 'is_feed' ] ) ) {
wp_cache_debug( 'Not caching feed.', 2 );
$cache_this_page = false;
}
if ( !isset( $wp_query ) )
wp_cache_debug( 'wp_cache_ob_callback: WARNING! $query not defined but the plugin has worked around that problem.', 4 );
if ( $cache_this_page ) {
wp_cache_debug( 'Output buffer callback', 4 );
$buffer = wp_cache_get_ob( $buffer );
wp_cache_shutdown_callback();
return $buffer;
} else {
if ( is_array( $do_rebuild_list ) && false == empty( $do_rebuild_list ) ) {
foreach( $do_rebuild_list as $dir => $n ) {
if ( wp_cache_confirm_delete( $dir ) ) {
wp_cache_debug( 'wp_cache_ob_callback clearing rebuilt files in ' . $dir );
$files_to_check = get_all_supercache_filenames( $dir );
foreach( $files_to_check as $cache_file ) {
$cache_file = $dir . $cache_file;
@unlink( $cache_file );
}
}
}
}
return wp_cache_maybe_dynamic( $buffer );
}
}
function wp_cache_append_tag( &$buffer ) {
global $wp_cache_gmt_offset, $wp_super_cache_comments;
global $cache_enabled, $super_cache_enabled;
if ( false == isset( $wp_super_cache_comments ) )
$wp_super_cache_comments = 1;
if ( $wp_super_cache_comments == 0 )
return false;
$timestamp = gmdate('Y-m-d H:i:s', (time() + ( $wp_cache_gmt_offset * 3600)));
if ( $cache_enabled || $super_cache_enabled ) {
$buffer .= "\n<!-- Cached page generated by WP-Super-Cache on $timestamp -->\n";
} else {
$buffer .= "\n<!-- Live page served on $timestamp -->\n";
}
}
function wp_cache_add_to_buffer( &$buffer, $text ) {
global $wp_super_cache_comments;
if ( false == isset( $wp_super_cache_comments ) )
$wp_super_cache_comments = 1;
if ( $wp_super_cache_comments == 0 )
return false;
$buffer .= "\n<!-- $text -->";
}
/*
* If dynamic caching is enabled then run buffer through wpsc_cachedata filter before returning it.
* or we'll return template tags to visitors.
*/
function wp_cache_maybe_dynamic( &$buffer ) {
global $wp_cache_mfunc_enabled;
if ( $wp_cache_mfunc_enabled == 1 && do_cacheaction( 'wpsc_cachedata_safety', 0 ) === 1 ) {
wp_cache_debug( 'wp_cache_maybe_dynamic: filtered $buffer through wpsc_cachedata', 4 );
return do_cacheaction( 'wpsc_cachedata', $buffer ); // dynamic content for display
} else {
wp_cache_debug( 'wp_cache_maybe_dynamic: returned $buffer', 4 );
return $buffer;
}
}
function wp_cache_get_ob(&$buffer) {
global $cache_enabled, $cache_path, $cache_filename, $meta_file, $wp_start_time, $supercachedir;
global $new_cache, $wp_cache_meta, $file_expired, $blog_id, $cache_compression;
global $wp_cache_gzip_encoding, $super_cache_enabled, $cached_direct_pages;
global $wp_cache_404, $gzsize, $supercacheonly;
global $blog_cache_dir, $wp_cache_request_uri, $wp_supercache_cache_list;
global $wp_cache_not_logged_in, $wp_cache_object_cache, $cache_max_time;
global $wp_cache_is_home, $wp_cache_front_page_checks, $wp_cache_mfunc_enabled;
if ( isset( $wp_cache_mfunc_enabled ) == false )
$wp_cache_mfunc_enabled = 0;
$new_cache = true;
$wp_cache_meta = array();
/* Mode paranoic, check for closing tags
* we avoid caching incomplete files */
if ( $buffer == '' ) {
$new_cache = false;
if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
wp_cache_debug( "Buffer is blank. Output buffer may have been corrupted by another plugin or this is a redirected URL. Look for text 'ob_start' in the files of your plugins directory.", 2 );
wp_cache_add_to_buffer( $buffer, "Page not cached by WP Super Cache. Blank Page. Check output buffer usage by plugins." );
}
}
if ( $wp_cache_404 && false == apply_filters( 'wpsupercache_404', false ) ) {
$new_cache = false;
if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
wp_cache_debug( "404 file not found not cached", 2 );
wp_cache_add_to_buffer( $buffer, "Page not cached by WP Super Cache. 404." );
}
}
if ( !preg_match( apply_filters( 'wp_cache_eof_tags', '/(<\/html>|<\/rss>|<\/feed>|<\/urlset|<\?xml)/i' ), $buffer ) ) {
$new_cache = false;
if( false === strpos( $_SERVER[ 'REQUEST_URI' ], 'robots.txt' ) ) {
if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) {
wp_cache_debug( "No closing html tag. Not caching.", 2 );
wp_cache_add_to_buffer( $buffer, "Page not cached by WP Super Cache. No closing HTML tag. Check your theme." );
}
} else {
wp_cache_debug( "robots.txt detected. Not caching.", 2 );
}
}
if( !$new_cache )
return wp_cache_maybe_dynamic( $buffer );
$duration = wp_cache_microtime_diff($wp_start_time, microtime());
$duration = sprintf("%0.3f", $duration);
wp_cache_add_to_buffer( $buffer, "Dynamic page generated in $duration seconds." );
if( !wp_cache_writers_entry() ) {
wp_cache_add_to_buffer( $buffer, "Page not cached by WP Super Cache. Could not get mutex lock." );
wp_cache_debug( "Could not get mutex lock. Not caching.", 1 );
return wp_cache_maybe_dynamic( $buffer );
}
if ( $wp_cache_not_logged_in && is_feed() ) {
wp_cache_debug( "Feed detected. Writing legacy cache files.", 5 );
$wp_cache_not_logged_in = false;
}
$home_url = parse_url( trailingslashit( get_bloginfo( 'url' ) ) );
$dir = get_current_url_supercache_dir();
$supercachedir = $cache_path . 'supercache/' . preg_replace('/:.*$/', '', $home_url[ 'host' ]);
if( !empty( $_GET ) || is_feed() || ( $super_cache_enabled == true && is_dir( substr( $supercachedir, 0, -1 ) . '.disabled' ) ) ) {
wp_cache_debug( "Supercache disabled: GET or feed detected or disabled by config.", 2 );
$super_cache_enabled = false;
}
$tmp_wpcache_filename = $cache_path . uniqid( mt_rand(), true ) . '.tmp';
$supercacheonly = false;
if( $super_cache_enabled ) {
if ( wp_cache_get_cookies_values() == '' && empty( $_GET ) ) {
wp_cache_debug( "Anonymous user detected. Only creating Supercache file.", 3 );
$supercacheonly = true;
}
}
$cache_error = '';
if ( $wp_cache_not_logged_in && wp_cache_get_cookies_values() != '' ) {
$super_cache_enabled = false;
$cache_enabled = false;
$cache_error = 'Not caching requests by known users. (See Advanced Settings page)';
wp_cache_debug( 'Not caching for known user.', 5 );
}
if ( $wp_cache_object_cache ) { // half on mode when using the object cache
if ( wp_cache_get_cookies_values() != '' ) {
$cache_enabled = false;
$cache_error = 'Known User and using object. Only anonymous users cached.';
}
$super_cache_enabled = false;
$supercacheonly = false;
wp_cache_init(); // PHP5 destroys objects during shutdown
}
if ( !$cache_enabled ) {
wp_cache_debug( 'Cache is not enabled. Sending buffer to browser.', 5 );
wp_cache_writers_exit();
wp_cache_add_to_buffer( $buffer, "Page not cached by WP Super Cache. Check your settings page. $cache_error" );
if ( $wp_cache_mfunc_enabled == 1 ) {
global $wp_super_cache_late_init;
if ( false == isset( $wp_super_cache_late_init ) || ( isset( $wp_super_cache_late_init ) && $wp_super_cache_late_init == 0 ) )
wp_cache_add_to_buffer( $buffer, 'Super Cache dynamic page detected but $wp_super_cache_late_init not set. See the readme.txt for further details.' );
}
return wp_cache_maybe_dynamic( $buffer );
}
if( @is_dir( $dir ) == false )
@wp_mkdir_p( $dir );
$fr = $fr2 = $gz = false;
// Open wp-cache cache file
if ( false == $wp_cache_object_cache ) {
if ( !$supercacheonly ) {
$fr = @fopen($tmp_wpcache_filename, 'w');
if (!$fr) {
wp_cache_debug( "Error. Supercache could not write to " . str_replace( ABSPATH, '', $cache_path ) . $cache_filename, 1 );
wp_cache_add_to_buffer( $buffer, "File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $cache_path ) . $cache_filename );
wp_cache_writers_exit();
return wp_cache_maybe_dynamic( $buffer );
}
} else {
$user_info = wp_cache_get_cookies_values();
$do_cache = apply_filters( 'do_createsupercache', $user_info );
if ( $super_cache_enabled && ( $user_info == '' || $do_cache === true ) ) {
$cache_fname = $dir . supercache_filename();
$tmp_cache_filename = $dir . uniqid( mt_rand(), true ) . '.tmp';
$fr2 = @fopen( $tmp_cache_filename, 'w' );
if ( !$fr2 ) {
wp_cache_debug( "Error. Supercache could not write to " . str_replace( ABSPATH, '', $tmp_cache_filename ), 1 );
wp_cache_add_to_buffer( $buffer, "File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $tmp_cache_filename ) );
@fclose( $fr );
@unlink( $tmp_wpcache_filename );
wp_cache_writers_exit();
return wp_cache_maybe_dynamic( $buffer );
} elseif ( ( !isset( $wp_cache_mfunc_enabled ) || $wp_cache_mfunc_enabled == 0 ) && $cache_compression ) { // don't want to store compressed files if using dynamic content
$gz = @fopen( $tmp_cache_filename . ".gz", 'w');
if (!$gz) {
wp_cache_debug( "Error. Supercache could not write to " . str_replace( ABSPATH, '', $tmp_cache_filename ) . ".gz", 1 );
wp_cache_add_to_buffer( $buffer, "File not cached! Super Cache Couldn't write to: " . str_replace( ABSPATH, '', $tmp_cache_filename ) . ".gz" );
@fclose( $fr );
@unlink( $tmp_wpcache_filename );
@fclose( $fr2 );
@unlink( $tmp_cache_filename );
wp_cache_writers_exit();
return wp_cache_maybe_dynamic( $buffer );
}
}
}
}
}
$added_cache = 0;
$oc_key = get_oc_key();
$buffer = apply_filters( 'wpsupercache_buffer', $buffer );
wp_cache_append_tag( $buffer );
/*
* Dynamic content enabled: write the buffer to a file and then process any templates found using
* the wpsc_cachedata filter. Buffer is then returned to the visitor.
*/
if ( $wp_cache_mfunc_enabled == 1 ) {
if ( preg_match( '/<!--mclude|<!--mfunc|<!--dynamic-cached-content-->/', $buffer ) ) { //Dynamic content
wp_cache_debug( "mfunc/mclude/dynamic-cached-content tags have been retired. Please update your theme. See docs for updates." );
wp_cache_add_to_buffer( $buffer, "Warning! Obsolete mfunc/mclude/dynamic-cached-content tags found. Please update your theme. See http://ocaoimh.ie/y/5b for more information." );
}
global $wp_super_cache_late_init;
if ( false == isset( $wp_super_cache_late_init ) || ( isset( $wp_super_cache_late_init ) && $wp_super_cache_late_init == 0 ) )
wp_cache_add_to_buffer( $buffer, 'Super Cache dynamic page detected but late init not set. See the readme.txt for further details.' );
if ( $fr ) { // legacy caching
wp_cache_debug( "Writing dynamic buffer to legacy file." );
wp_cache_add_to_buffer( $buffer, "Dynamic Legacy Super Cache" );
fputs( $fr, '<?php die(); ?>' . $buffer );
} elseif ( isset( $fr2 ) ) { // supercache active
wp_cache_debug( "Writing dynamic buffer to supercache file." );
wp_cache_add_to_buffer( $buffer, "Dynamic Super Cache" );
fputs( $fr2, $buffer );
} elseif ( true == $wp_cache_object_cache ) {
wp_cache_set( $oc_key, $buffer, 'supercache', $cache_max_time );
}
$wp_cache_meta[ 'dynamic' ] = true;
if ( do_cacheaction( 'wpsc_cachedata_safety', 0 ) === 1 )
$buffer = do_cacheaction( 'wpsc_cachedata', $buffer ); // dynamic content for display
if ( $cache_compression && $wp_cache_gzip_encoding ) {
wp_cache_debug( "Gzipping dynamic buffer for display.", 5 );
wp_cache_add_to_buffer( $buffer, "Compression = gzip" );
$gzdata = gzencode( $buffer, 6, FORCE_GZIP );
$gzsize = function_exists( 'mb_strlen' ) ? mb_strlen( $gzdata, '8bit' ) : strlen( $gzdata );
}
} else {
if ( $gz || $wp_cache_gzip_encoding ) {
wp_cache_debug( "Gzipping buffer.", 5 );
wp_cache_add_to_buffer( $buffer, "Compression = gzip" );
$gzdata = gzencode( $buffer, 6, FORCE_GZIP );
$gzsize = function_exists( 'mb_strlen' ) ? mb_strlen( $gzdata, '8bit' ) : strlen( $gzdata );
$wp_cache_meta[ 'headers' ][ 'Content-Encoding' ] = 'Content-Encoding: ' . $wp_cache_gzip_encoding;
$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Accept-Encoding, Cookie';
// Return uncompressed data & store compressed for later use
if ( $fr ) {
wp_cache_debug( "Writing gzipped buffer to wp-cache cache file.", 5 );
fputs($fr, '<?php die(); ?>' . $gzdata);
} elseif ( $cache_enabled && $wp_cache_object_cache ) {
wp_cache_set( $oc_key . ".gz", $gzdata, 'supercache', $cache_max_time );
$added_cache = 1;
}
} else { // no compression
$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Cookie';
if ( $cache_enabled && $wp_cache_object_cache ) {
wp_cache_set( $oc_key, $buffer, 'supercache', $cache_max_time );
$added_cache = 1;
} elseif ( $fr ) {
wp_cache_debug( "Writing non-gzipped buffer to wp-cache cache file." );
fputs($fr, '<?php die(); ?>' . $buffer);
}
}
if ( $fr2 ) {
wp_cache_debug( "Writing non-gzipped buffer to supercache file." );
wp_cache_add_to_buffer( $buffer, "super cache" );
fputs($fr2, $buffer );
}
if ( isset( $gzdata ) && $gz ) {
wp_cache_debug( "Writing gzipped buffer to supercache file." );
fwrite($gz, $gzdata );
}
}
$new_cache = true;
if ( false == $wp_cache_object_cache ) {
if( $fr ) {
$supercacheonly = false;
fclose($fr);
if ( filesize( $tmp_wpcache_filename ) == 0 ) {
wp_cache_debug( "Warning! The file $tmp_wpcache_filename was empty. Did not rename to {$blog_cache_dir}{$cache_filename}", 5 );
@unlink( $tmp_wpcache_filename );
} else {
if ( !@rename( $tmp_wpcache_filename, $blog_cache_dir . $cache_filename ) ) {
if ( false == is_dir( $blog_cache_dir ) )
@wp_mkdir_p( $blog_cache_dir );
@unlink( $blog_cache_dir . $cache_filename );
@rename( $tmp_wpcache_filename, $blog_cache_dir . $cache_filename );
}
wp_cache_debug( "Renamed temp wp-cache file to {$blog_cache_dir}$cache_filename", 5 );
$added_cache = 1;
}
}
if( $fr2 ) {
fclose($fr2);
if ( $wp_cache_front_page_checks && $cache_fname == $supercachedir . $home_url[ 'path' ] . supercache_filename() && !( $wp_cache_is_home ) ) {
wp_cache_writers_exit();
wp_cache_debug( "Warning! Not writing another page to front page cache.", 1 );
return $buffer;
} elseif ( filesize( $tmp_cache_filename ) == 0 ) {
wp_cache_debug( "Warning! The file $tmp_cache_filename was empty. Did not rename to {$cache_fname}", 5 );
@unlink( $tmp_cache_filename );
} else {
if ( !@rename( $tmp_cache_filename, $cache_fname ) ) {
@unlink( $cache_fname );
@rename( $tmp_cache_filename, $cache_fname );
}
wp_cache_debug( "Renamed temp supercache file to $cache_fname", 5 );
$added_cache = 1;
}
}
if( $gz ) {
fclose($gz);
if ( filesize( $tmp_cache_filename . '.gz' ) == 0 ) {
wp_cache_debug( "Warning! The file {$tmp_cache_filename}.gz was empty. Did not rename to {$cache_fname}.gz", 5 );
@unlink( $tmp_cache_filename . '.gz' );
} else {
if ( !@rename( $tmp_cache_filename . '.gz', $cache_fname . '.gz' ) ) {
@unlink( $cache_fname . '.gz' );
@rename( $tmp_cache_filename . '.gz', $cache_fname . '.gz' );
}
wp_cache_debug( "Renamed temp supercache gz file to {$cache_fname}.gz", 5 );
$added_cache = 1;
}
}
}
if ( $added_cache && isset( $wp_supercache_cache_list ) && $wp_supercache_cache_list ) {
update_option( 'wpsupercache_count', ( get_option( 'wpsupercache_count' ) + 1 ) );
$last_urls = (array)get_option( 'supercache_last_cached' );
if ( count( $last_urls ) >= 10 )
$last_urls = array_slice( $last_urls, 1, 9 );
$last_urls[] = array( 'url' => preg_replace( '/[ <>\'\"\r\n\t\(\)]/', '', $_SERVER[ 'REQUEST_URI' ] ), 'date' => date( 'Y-m-d H:i:s' ) );
update_option( 'supercache_last_cached', $last_urls );
}
wp_cache_writers_exit();
if ( !headers_sent() && $wp_cache_gzip_encoding && $gzdata) {
wp_cache_debug( "Writing gzip content headers. Sending buffer to browser", 5 );
header( 'Content-Encoding: ' . $wp_cache_gzip_encoding );
header( 'Vary: Accept-Encoding, Cookie' );
header( 'Content-Length: ' . $gzsize );
return $gzdata;
} else {
wp_cache_debug( "Sending buffer to browser", 5 );
return $buffer;
}
}
function wp_cache_phase2_clean_cache($file_prefix) {
global $cache_path, $blog_cache_dir;
if( !wp_cache_writers_entry() )
return false;
wp_cache_debug( "wp_cache_phase2_clean_cache: Cleaning cache in $blog_cache_dir" );
if ( $handle = @opendir( $blog_cache_dir ) ) {
while ( false !== ($file = @readdir($handle))) {
if ( strpos( $file, $file_prefix ) !== false ) {
if ( strpos( $file, '.html' ) ) {
// delete old legacy files immediately
wp_cache_debug( "wp_cache_phase2_clean_cache: Deleting obsolete legacy cache+meta files: $file" );
@unlink( $blog_cache_dir . $file);
@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
} else {
$meta = json_decode( wp_cache_get_legacy_cache( $blog_cache_dir . 'meta/' . $file ), true );
if ( $meta[ 'blog_id' ] == $wpdb->blogid ) {
@unlink( $blog_cache_dir . $file );
@unlink( $blog_cache_dir . 'meta/' . $file );
}
}
}
}
closedir($handle);
}
wp_cache_writers_exit();
}
function prune_super_cache( $directory, $force = false, $rename = false ) {
global $cache_max_time, $cache_path, $cache_rebuild_files, $blog_cache_dir;
static $log = 0;
if ( false == @file_exists( $directory ) ) {
wp_cache_debug( "prune_super_cache: exiting as file/dir does not exist: $directory" );
return $log;
}
if( !isset( $cache_max_time ) )
$cache_max_time = 3600;
$now = time();
$protected_directories = array( $cache_path . '.htaccess',
$cache_path . "index.html",
$cache_path . $blog_cache_dir,
$cache_path . $blog_cache_dir . "index.html",
$cache_path . $blog_cache_dir . 'meta',
$cache_path . $blog_cache_dir . 'meta/index.html',
$cache_path . 'supercache/index.html',
$cache_path . 'supercache' );
$oktodelete = false;
if (is_dir($directory)) {
if( $dh = @opendir( $directory ) ) {
$directory = trailingslashit( $directory );
while( ( $entry = @readdir( $dh ) ) !== false ) {
if ($entry == '.' || $entry == '..')
continue;
$entry = $directory . $entry;
prune_super_cache( $entry, $force, $rename );
// If entry is a directory, AND it's not a protected one, AND we're either forcing the delete, OR the file is out of date,
if( is_dir( $entry ) && !in_array( $entry, $protected_directories ) && ( $force || @filemtime( $entry ) + $cache_max_time <= $now ) ) {
// if the directory isn't empty can't delete it
if( $handle = @opendir( $entry ) ) {
$donotdelete = false;
while( !$donotdelete && ( $file = @readdir( $handle ) ) !== false ) {
if ($file == '.' || $file == '..')
continue;
$donotdelete = true;
wp_cache_debug( "gc: could not delete $entry as it's not empty: $file", 2 );
}
closedir($handle);
}
if( $donotdelete )
continue;
if( !$rename ) {
@rmdir( $entry );
$log++;
if ( $force ) {
wp_cache_debug( "gc: deleted $entry, forced delete", 2 );
} else {
wp_cache_debug( "gc: deleted $entry, older than $cache_max_time seconds", 2 );
}
}
} elseif ( in_array( $entry, $protected_directories ) ) {
wp_cache_debug( "gc: could not delete $entry as it's protected.", 2 );
}
}
closedir($dh);
}
} elseif( is_file($directory) && ($force || @filemtime( $directory ) + $cache_max_time <= $now ) ) {
$oktodelete = true;
if ( in_array( $directory, $protected_directories ) ) {
wp_cache_debug( "gc: could not delete $directory as it's protected.", 2 );
$oktodelete = false;
}
if( $oktodelete && !$rename ) {
wp_cache_debug( "prune_super_cache: deleted $directory", 5 );
@unlink( $directory );
$log++;
} elseif( $oktodelete && $rename ) {
wp_cache_debug( "prune_super_cache: wp_cache_rebuild_or_delete( $directory )", 5 );
wp_cache_rebuild_or_delete( $directory );
$log++;
} else {
wp_cache_debug( "prune_super_cache: did not delete file: $directory" );
}
} else {
wp_cache_debug( "prune_super_cache: did not delete file as it wasn't a directory or file and not forced to delete new file: $directory" );
}
return $log;
}
function wp_cache_rebuild_or_delete( $file ) {
global $cache_rebuild_files;
if( strpos( $file, '?' ) !== false )
$file = substr( $file, 0, strpos( $file, '?' ) );
if( $cache_rebuild_files && substr( $file, -14 ) != '.needs-rebuild' ) {
if( @rename($file, $file . '.needs-rebuild') ) {
@touch( $file . '.needs-rebuild' );
wp_cache_debug( "rebuild_or_gc: rename file to {$file}.needs-rebuild", 2 );
} else {
@unlink( $file );
wp_cache_debug( "rebuild_or_gc: deleted $file", 2 );
}
} else {
@unlink( $file );
wp_cache_debug( "rebuild_or_gc: deleted $file", 2 );
}
}
function wp_cache_phase2_clean_expired( $file_prefix, $force = false ) {
global $cache_path, $cache_max_time, $blog_cache_dir, $wp_cache_preload_on;
clearstatcache();
if( !wp_cache_writers_entry() )
return false;
$now = time();
wp_cache_debug( "Cleaning expired cache files in $blog_cache_dir", 2 );
$deleted = 0;
if ( ( $handle = @opendir( $blog_cache_dir ) ) ) {
while ( false !== ($file = readdir($handle))) {
if ( preg_match("/^$file_prefix/", $file) &&
(@filemtime( $blog_cache_dir . $file) + $cache_max_time) <= $now ) {
@unlink( $blog_cache_dir . $file );
@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
wp_cache_debug( "wp_cache_phase2_clean_expired: Deleting obsolete legacy cache+meta files: $file" );
continue;
}
if($file != '.' && $file != '..') {
if( is_dir( $blog_cache_dir . $file ) == false && (@filemtime($blog_cache_dir . $file) + $cache_max_time) <= $now ) {
if ( substr( $file, -9 ) != '.htaccess' && $file != 'index.html' ) {
@unlink($blog_cache_dir . $file);
wp_cache_debug( "Deleting $blog_cache_dir{$file}, older than $cache_max_time seconds", 5 );
}
}
}
}
closedir($handle);
if ( false == $wp_cache_preload_on || true == $force ) {
wp_cache_debug( "Doing GC on supercache dir: {$cache_path}supercache", 2 );
$deleted = prune_super_cache( $cache_path . 'supercache', false, false );
}
}
wp_cache_writers_exit();
return $deleted;
}
function wp_cache_shutdown_callback() {
global $cache_path, $cache_max_time, $file_expired, $file_prefix, $meta_file, $new_cache, $wp_cache_meta, $known_headers, $blog_id, $wp_cache_gzip_encoding, $gzsize, $cache_filename, $supercacheonly, $blog_cache_dir;
global $wp_cache_request_uri, $wp_cache_key, $wp_cache_object_cache, $cache_enabled, $wp_cache_blog_charset, $wp_cache_not_logged_in;
global $WPSC_HTTP_HOST;
$wp_cache_meta[ 'uri' ] = $WPSC_HTTP_HOST . preg_replace('/[ <>\'\"\r\n\t\(\)]/', '', $wp_cache_request_uri); // To avoid XSS attacks
$wp_cache_meta[ 'blog_id' ] = $blog_id;
$wp_cache_meta[ 'post' ] = wp_cache_post_id();
$wp_cache_meta[ 'key' ] = $wp_cache_key;
$wp_cache_meta = apply_filters( 'wp_cache_meta', $wp_cache_meta );
$response = wp_cache_get_response_headers();
foreach ($known_headers as $key) {
if(isset($response[$key])) {
$wp_cache_meta[ 'headers' ][ $key ] = "$key: " . $response[$key];
}
}
wp_cache_debug( "wp_cache_shutdown_callback: collecting meta data.", 2 );
if (!isset( $response['Last-Modified'] )) {
$value = gmdate('D, d M Y H:i:s') . ' GMT';
/* Dont send this the first time */
/* @header('Last-Modified: ' . $value); */
$wp_cache_meta[ 'headers' ][ 'Last-Modified' ] = "Last-Modified: $value";
}
if ( !isset( $response[ 'Content-Type' ] ) && !isset( $response[ 'Content-type' ] ) ) {
// On some systems, headers set by PHP can't be fetched from
// the output buffer. This is a last ditch effort to set the
// correct Content-Type header for feeds, if we didn't see
// it in the response headers already. -- dougal
if (is_feed()) {
$type = get_query_var('feed');
$type = str_replace('/','',$type);
switch ($type) {
case 'atom':
$value = "application/atom+xml";
break;
case 'rdf':
$value = "application/rdf+xml";
break;
case 'rss':
case 'rss2':
default:
$value = "application/rss+xml";
}
} else { // not a feed
$value = get_option( 'html_type' );
if( $value == '' )
$value = 'text/html';
}
$value .= "; charset=\"" . $wp_cache_blog_charset . "\"";
wp_cache_debug( "Sending 'Content-Type: $value' header.", 2 );
@header("Content-Type: $value");
$wp_cache_meta[ 'headers' ][ 'Content-Type' ] = "Content-Type: $value";
}
if ( $cache_enabled && !$supercacheonly && $new_cache ) {
if( !isset( $wp_cache_meta[ 'dynamic' ] ) && $wp_cache_gzip_encoding && !in_array( 'Content-Encoding: ' . $wp_cache_gzip_encoding, $wp_cache_meta[ 'headers' ] ) ) {
wp_cache_debug( "Sending gzip headers.", 2 );
$wp_cache_meta[ 'headers' ][ 'Content-Encoding' ] = 'Content-Encoding: ' . $wp_cache_gzip_encoding;
$wp_cache_meta[ 'headers' ][ 'Vary' ] = 'Vary: Accept-Encoding, Cookie';
}
$serial = '<?php die(); ?>' . json_encode( $wp_cache_meta );
if( wp_cache_writers_entry() ) {
wp_cache_debug( "Writing meta file: {$blog_cache_dir}meta/{$meta_file}", 2 );
if ( false == $wp_cache_object_cache ) {
$tmp_meta_filename = $blog_cache_dir . 'meta/' . uniqid( mt_rand(), true ) . '.tmp';
$fr = @fopen( $tmp_meta_filename, 'w');
if( !$fr )
@wp_mkdir_p( $blog_cache_dir . 'meta' );
$fr = @fopen( $tmp_meta_filename, 'w');
if ( $fr ) {
fputs($fr, $serial);
fclose($fr);
@chmod( $tmp_meta_filename, 0666 & ~umask());
if( !@rename( $tmp_meta_filename, $blog_cache_dir . 'meta/' . $meta_file ) ) {
@unlink( $blog_cache_dir . 'meta/' . $meta_file );
@rename( $tmp_meta_filename, $blog_cache_dir . 'meta/' . $meta_file );
}
} else {
wp_cache_debug( "Problem writing meta file: {$blog_cache_dir}meta/{$meta_file}", 2 );
}
} elseif ( $cache_enabled ) {
$oc_key = get_oc_key() . ".meta";
if ( gzip_accepted() )
$oc_key .= ".gz";
wp_cache_set( $oc_key, $serial, 'supercache', $cache_max_time );
}
wp_cache_writers_exit();
}
} else {
wp_cache_debug( "Did not write meta file: $meta_file *$supercacheonly* *$wp_cache_not_logged_in* *$new_cache*", 2 );
}
global $time_to_gc_cache;
if( isset( $time_to_gc_cache ) && $time_to_gc_cache == 1 ) {
wp_cache_debug( "Executing wp_cache_gc action.", 3 );
do_action( 'wp_cache_gc' );
}
}
function wp_cache_no_postid($id) {
return wp_cache_post_change(wp_cache_post_id());
}
function wp_cache_get_postid_from_comment( $comment_id, $status = 'NA' ) {
global $super_cache_enabled, $wp_cache_request_uri;
$comment = get_comment($comment_id, ARRAY_A);
if ( $status != 'NA' ) {
$comment[ 'old_comment_approved' ] = $comment[ 'comment_approved' ];
$comment[ 'comment_approved' ] = $status;
}
if ( ( $status == 'trash' || $status == 'spam' ) && $comment[ 'old_comment_approved' ] != 1 ) {
// don't modify cache if moderated comments are trashed or spammed
wp_cache_debug( "Moderated comment deleted or spammed. Don't delete any cache files.", 4 );
define( 'DONOTDELETECACHE', 1 );
return wp_cache_post_id();
}
$postid = $comment['comment_post_ID'];
// Do nothing if comment is not moderated
// http://ocaoimh.ie/2006/12/05/caching-wordpress-with-wp-cache-in-a-spam-filled-world
if ( !preg_match('/wp-admin\//', $wp_cache_request_uri) ) {
if ( $comment['comment_approved'] == 'delete' && ( isset( $comment[ 'old_comment_approved' ] ) && $comment[ 'old_comment_approved' ] == 0 ) ) { // do nothing if moderated comments are deleted
wp_cache_debug( "Moderated comment deleted. Don't delete any cache files.", 4 );
define( 'DONOTDELETECACHE', 1 );
return $postid;
} elseif ( $comment['comment_approved'] == 'spam' ) {
wp_cache_debug( "Spam comment. Don't delete any cache files.", 4 );
define( 'DONOTDELETECACHE', 1 );
return $postid;
} elseif( $comment['comment_approved'] == '0' ) {
if ( $comment[ 'content_type' ] == '' ) {