0 && strstr($uri, $expr)) return true; } return false; } 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; foreach ($cache_rejected_user_agent as $expr) { if (strlen($expr) > 0 && stristr($headers["User-Agent"], $expr)) return true; } return false; } function wp_cache_mutex_init() { global $use_flock, $mutex, $cache_path, $mutex_filename, $sem_id; if(!is_bool($use_flock)) { if(function_exists('sem_get')) $use_flock = false; else $use_flock = true; } if ($use_flock) $mutex = fopen($cache_path . $mutex_filename, 'w'); else $mutex = sem_get($sem_id, 1, 0644 | IPC_CREAT, 1); } function wp_cache_writers_entry() { global $use_flock, $mutex, $cache_path, $mutex_filename; if ($use_flock) flock($mutex, LOCK_EX); else sem_acquire($mutex); } function wp_cache_writers_exit() { global $use_flock, $mutex, $cache_path, $mutex_filename; if ($use_flock) flock($mutex, LOCK_UN); else sem_release($mutex); } function wp_cache_ob_callback($buffer) { global $cache_path, $cache_filename, $meta_file, $wp_start_time; global $new_cache, $wp_cache_meta_object, $file_expired, $blog_id; /* Mode paranoic, check for closing tags * we avoid caching incomplete files */ if (is_404() || !preg_match('/(<\/html>|<\/rss>|<\/feed>)/i',$buffer) ) { $new_cache = false; return $buffer; } $duration = wp_cache_microtime_diff($wp_start_time, microtime()); $duration = sprintf("%0.3f", $duration); $buffer .= "\n\n"; wp_cache_writers_entry(); $mtime = @filemtime($cache_path . $cache_filename); /* Return if: the file didn't exist before but it does exist now (another connection created) OR the file was expired and its mtime is less than 5 seconds */ if( !((!$file_expired && $mtime) || ($mtime && $file_expired && (time() - $mtime) < 5)) ) { $fr = fopen($cache_path . $cache_filename, 'w'); if (!$fr) $buffer = "Couldn't write to: " . $cache_path . $cache_filename . "\n"; if (preg_match('/(.*?)|is', "\n\n", $buffer); $store = preg_replace('|(.*?)|is', "\n\n", $store); $wp_cache_meta_object->dynamic = true; /* Clean function calls in tag */ $buffer = preg_replace('||is', '', $buffer); $buffer = preg_replace('||is', '', $buffer); fputs($fr, $store); } else { fputs($fr, $buffer); } $new_cache = true; fclose($fr); } wp_cache_writers_exit(); return $buffer; } function wp_cache_phase2_clean_cache($file_prefix) { global $cache_path; wp_cache_writers_entry(); if ( ($handle = opendir( $cache_path )) ) { while ( false !== ($file = readdir($handle))) { if ( preg_match("/^$file_prefix/", $file) ) { unlink($cache_path . $file); } } closedir($handle); } wp_cache_writers_exit(); } function wp_cache_phase2_clean_expired($file_prefix) { global $cache_path, $cache_max_time; clearstatcache(); wp_cache_writers_entry(); $now = time(); if ( ($handle = opendir( $cache_path )) ) { while ( false !== ($file = readdir($handle))) { if ( preg_match("/^$file_prefix/", $file) && (filemtime($cache_path . $file) + $cache_max_time) <= $now ) { unlink($cache_path . $file); } } closedir($handle); } wp_cache_writers_exit(); } function wp_cache_shutdown_callback() { global $cache_path, $cache_max_time, $file_expired, $file_prefix, $meta_file, $new_cache; global $wp_cache_meta_object, $known_headers, $blog_id; $wp_cache_meta_object->uri = $_SERVER["SERVER_NAME"].preg_replace('/[ <>\'\"\r\n\t\(\)]/', '', $_SERVER['REQUEST_URI']); // To avoid XSS attacs $wp_cache_meta_object->blog_id=$blog_id; $wp_cache_meta_object->post = wp_cache_post_id(); $response = wp_cache_get_response_headers(); $wp_cache_meta_object->headers = array(); foreach ($known_headers as $key) { if(isset($response{$key})) { array_push($wp_cache_meta_object->headers, "$key: " . $response{$key}); } } /* Not used because it gives problems with some * PHP installations if (!$response{'Content-Length'}) { // WP does not set content size $content_size = ob_get_length(); @header("Content-Length: $content_size"); array_push($wp_cache_meta_object->headers, "Content-Length: $content_size"); } */ if (!$response{'Last-Modified'}) { $value = gmdate('D, d M Y H:i:s') . ' GMT'; /* Dont send this the first time */ /* @header('Last-Modified: ' . $value); */ array_push($wp_cache_meta_object->headers, "Last-Modified: $value"); } if (!$response{'Content-Type'}) { $value = "text/html; charset=\"" . get_settings('blog_charset') . "\""; @header("Content-Type: $value"); array_push($wp_cache_meta_object->headers, "Content-Type: $value"); } ob_end_flush(); if ($new_cache) { $serial = serialize($wp_cache_meta_object); wp_cache_writers_entry(); $fr = fopen($cache_path . $meta_file, 'w'); fputs($fr, $serial); fclose($fr); wp_cache_writers_exit(); } if ($file_expired == false) { return; } // we delete expired files flush(); //Ensure we send data to the client wp_cache_phase2_clean_expired($file_prefix); } function wp_cache_no_postid($id) { return wp_cache_post_change(wp_cache_post_id()); } function wp_cache_get_postid_from_comment($comment_id) { $comment = get_commentdata($comment_id, 1, true); $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\//', $_SERVER['REQUEST_URI']) && $comment['comment_approved'] != 1 ) return $post_id; // We must check it up again due to WP bugs calling two different actions // for delete, for example both wp_set_comment_status and delete_comment // are called when deleting a comment if ($postid > 0) return wp_cache_post_change($postid); else return wp_cache_post_change(wp_cache_post_id()); } function wp_cache_post_change($post_id) { global $file_prefix; global $cache_path; global $blog_id; static $last_processed = -1; // Avoid cleaning twice the same pages if ($post_id == $last_processed) return $post_id; $last_processed = $post_id; $meta = new CacheMeta; $matches = array(); wp_cache_writers_entry(); if ( ($handle = opendir( $cache_path )) ) { while ( false !== ($file = readdir($handle))) { if ( preg_match("/^($file_prefix.*)\.meta/", $file, $matches) ) { $meta_pathname = $cache_path . $file; $content_pathname = $cache_path . $matches[1] . ".html"; $meta = unserialize(@file_get_contents($meta_pathname)); if ($post_id > 0 && $meta) { if ($meta->blog_id == $blog_id && (!$meta->post || $meta->post == $post_id) ) { unlink($meta_pathname); unlink($content_pathname); } } elseif ($meta->blog_id == $blog_id) { unlink($meta_pathname); unlink($content_pathname); } } } closedir($handle); } wp_cache_writers_exit(); return $post_id; } function wp_cache_microtime_diff($a, $b) { list($a_dec, $a_sec) = explode(' ', $a); list($b_dec, $b_sec) = explode(' ', $b); return $b_sec - $a_sec + $b_dec - $a_dec; } function wp_cache_post_id() { global $posts, $comment_post_ID, $post_ID; // We try hard all options. More frequent first. if ($post_ID > 0 ) return $post_ID; if ($comment_post_ID > 0 ) return $comment_post_ID; if (is_single() || is_page()) return $posts[0]->ID; if ($_GET['p'] > 0) return $_GET['p']; if ($_POST['p'] > 0) return $_POST['p']; return 0; } ?>