<?php class HTMLPurifier_DefinitionCache_Serializer extends HTMLPurifier_DefinitionCache { public function add($def, $config) { if (!$this->checkDefType($def)) return; $file = $this->generateFilePath($config); if (file_exists($file)) return false; if (!$this->_prepareDir($config)) return false; return $this->_write($file, serialize($def)); } public function set($def, $config) { if (!$this->checkDefType($def)) return; $file = $this->generateFilePath($config); if (!$this->_prepareDir($config)) return false; return $this->_write($file, serialize($def)); } public function replace($def, $config) { if (!$this->checkDefType($def)) return; $file = $this->generateFilePath($config); if (!file_exists($file)) return false; if (!$this->_prepareDir($config)) return false; return $this->_write($file, serialize($def)); } public function get($config) { $file = $this->generateFilePath($config); if (!file_exists($file)) return false; return unserialize(file_get_contents($file)); } public function remove($config) { $file = $this->generateFilePath($config); if (!file_exists($file)) return false; return unlink($file); } public function flush($config) { if (!$this->_prepareDir($config)) return false; $dir = $this->generateDirectoryPath($config); $dh = opendir($dir); while (false !== ($filename = readdir($dh))) { if (empty($filename)) continue; if ($filename[0] === '.') continue; unlink($dir . '/' . $filename); } } public function cleanup($config) { if (!$this->_prepareDir($config)) return false; $dir = $this->generateDirectoryPath($config); $dh = opendir($dir); while (false !== ($filename = readdir($dh))) { if (empty($filename)) continue; if ($filename[0] === '.') continue; $key = substr($filename, 0, strlen($filename) - 4); if ($this->isOld($key, $config)) unlink($dir . '/' . $filename); } } /** * Generates the file path to the serial file corresponding to * the configuration and definition name * @todo Make protected */ public function generateFilePath($config) { $key = $this->generateKey($config); return $this->generateDirectoryPath($config) . '/' . $key . '.ser'; } /** * Generates the path to the directory contain this cache's serial files * @note No trailing slash * @todo Make protected */ public function generateDirectoryPath($config) { $base = $this->generateBaseDirectoryPath($config); return $base . '/' . $this->type; } /** * Generates path to base directory that contains all definition type * serials * @todo Make protected */ public function generateBaseDirectoryPath($config) { $base = $config->get('Cache.SerializerPath'); $base = is_null($base) ? HTMLPURIFIER_PREFIX . '/HTMLPurifier/DefinitionCache/Serializer' : $base; return $base; } /** * Convenience wrapper function for file_put_contents * @param $file File name to write to * @param $data Data to write into file * @return Number of bytes written if success, or false if failure. */ private function _write($file, $data) { return file_put_contents($file, $data); } /** * Prepares the directory that this type stores the serials in * @return True if successful */ private function _prepareDir($config) { $directory = $this->generateDirectoryPath($config); if (!is_dir($directory)) { $base = $this->generateBaseDirectoryPath($config); if (!is_dir($base)) { trigger_error('Base directory '.$base.' does not exist, please create or change using %Cache.SerializerPath', E_USER_WARNING); return false; } elseif (!$this->_testPermissions($base)) { return false; } $old = umask(0022); // disable group and world writes mkdir($directory); umask($old); } elseif (!$this->_testPermissions($directory)) { return false; } return true; } /** * Tests permissions on a directory and throws out friendly * error messages and attempts to chmod it itself if possible */ private function _testPermissions($dir) { // early abort, if it is writable, everything is hunky-dory if (is_writable($dir)) return true; if (!is_dir($dir)) { // generally, you'll want to handle this beforehand // so a more specific error message can be given trigger_error('Directory '.$dir.' does not exist', E_USER_WARNING); return false; } if (function_exists('posix_getuid')) { // POSIX system, we can give more specific advice if (fileowner($dir) === posix_getuid()) { // we can chmod it ourselves chmod($dir, 0755); return true; } elseif (filegroup($dir) === posix_getgid()) { $chmod = '775'; } else { // PHP's probably running as nobody, so we'll // need to give global permissions $chmod = '777'; } trigger_error('Directory '.$dir.' not writable, '. 'please chmod to ' . $chmod, E_USER_WARNING); } else { // generic error message trigger_error('Directory '.$dir.' not writable, '. 'please alter file permissions', E_USER_WARNING); } return false; } } // vim: et sw=4 sts=4