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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Cache\Traits; use Symfony\Component\Cache\Exception\InvalidArgumentException; /** * @author Nicolas Grekas <p@tchwork.com> * * @internal */ trait FilesystemCommonTrait { private $directory; private $tmp; private function init(string $namespace, ?string $directory) { if (!isset($directory[0])) { $directory = sys_get_temp_dir().\DIRECTORY_SEPARATOR.'symfony-cache'; } else { $directory = realpath($directory) ?: $directory; } if (isset($namespace[0])) { if (preg_match('#[^-+_.A-Za-z0-9]#', $namespace, $match)) { throw new InvalidArgumentException(sprintf('Namespace contains "%s" but only characters in [-+_.A-Za-z0-9] are allowed.', $match[0])); } $directory .= \DIRECTORY_SEPARATOR.$namespace; } else { $directory .= \DIRECTORY_SEPARATOR.'@'; } if (!file_exists($directory)) { @mkdir($directory, 0777, true); } $directory .= \DIRECTORY_SEPARATOR; // On Windows the whole path is limited to 258 chars if ('\\' === \DIRECTORY_SEPARATOR && \strlen($directory) > 234) { throw new InvalidArgumentException(sprintf('Cache directory too long (%s)', $directory)); } $this->directory = $directory; } /** * {@inheritdoc} */ protected function doClear($namespace) { $ok = true; foreach ($this->scanHashDir($this->directory) as $file) { if ('' !== $namespace && 0 !== strpos($this->getFileKey($file), $namespace)) { continue; } $ok = ($this->doUnlink($file) || !file_exists($file)) && $ok; } return $ok; } /** * {@inheritdoc} */ protected function doDelete(array $ids) { $ok = true; foreach ($ids as $id) { $file = $this->getFile($id); $ok = (!file_exists($file) || $this->doUnlink($file) || !file_exists($file)) && $ok; } return $ok; } protected function doUnlink($file) { return @unlink($file); } private function write(string $file, string $data, int $expiresAt = null) { set_error_handler(__CLASS__.'::throwError'); try { if (null === $this->tmp) { $this->tmp = $this->directory.uniqid('', true); } file_put_contents($this->tmp, $data); if (null !== $expiresAt) { touch($this->tmp, $expiresAt); } return rename($this->tmp, $file); } finally { restore_error_handler(); } } private function getFile(string $id, bool $mkdir = false, string $directory = null) { // Use MD5 to favor speed over security, which is not an issue here $hash = str_replace('/', '-', base64_encode(hash('md5', static::class.$id, true))); $dir = ($directory ?? $this->directory).strtoupper($hash[0].\DIRECTORY_SEPARATOR.$hash[1].\DIRECTORY_SEPARATOR); if ($mkdir && !file_exists($dir)) { @mkdir($dir, 0777, true); } return $dir.substr($hash, 2, 20); } private function getFileKey(string $file): string { return ''; } private function scanHashDir(string $directory): \Generator { if (!file_exists($directory)) { return; } $chars = '+-ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'; for ($i = 0; $i < 38; ++$i) { if (!file_exists($directory.$chars[$i])) { continue; } for ($j = 0; $j < 38; ++$j) { if (!file_exists($dir = $directory.$chars[$i].\DIRECTORY_SEPARATOR.$chars[$j])) { continue; } foreach (@scandir($dir, SCANDIR_SORT_NONE) ?: [] as $file) { if ('.' !== $file && '..' !== $file) { yield $dir.\DIRECTORY_SEPARATOR.$file; } } } } } /** * @internal */ public static function throwError($type, $message, $file, $line) { throw new \ErrorException($message, 0, $type, $file, $line); } /** * @return array */ public function __sleep() { throw new \BadMethodCallException('Cannot serialize '.__CLASS__); } public function __wakeup() { throw new \BadMethodCallException('Cannot unserialize '.__CLASS__); } public function __destruct() { if (method_exists(parent::class, '__destruct')) { parent::__destruct(); } if (null !== $this->tmp && file_exists($this->tmp)) { unlink($this->tmp); } } }