Viewing file:  FilesystemCommonTrait.php (5.37 KB) -rw-r--r--
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* 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 <[email protected]>
*
* @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 {
$directory .= \DIRECTORY_SEPARATOR.'@';
}
if (!is_dir($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(string $namespace)
{
$ok = true;
foreach ($this->scanHashDir($this->directory) as $file) {
if ('' !== $namespace && !str_starts_with($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);
$ok = (!is_file($file) || $this->doUnlink($file) || !file_exists($file)) && $ok;
}
return $ok;
}
protected function doUnlink(string $file)
{
return @unlink($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.bin2hex(random_bytes(6));
}
try {
$h = fopen($this->tmp, 'x');
} catch (\ErrorException $e) {
if (!str_contains($e->getMessage(), 'File exists')) {
throw $e;
}
$this->tmp = $this->directory.bin2hex(random_bytes(6));
$h = fopen($this->tmp, 'x');
}
fwrite($h, $data);
fclose($h);
if (null !== $expiresAt) {
touch($this->tmp, $expiresAt ?: time() + 31556952); // 1 year in seconds
}
return rename($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 && !is_dir($dir)) {
@mkdir($dir, 0777, true);
}
return $dir.substr($hash, 2, 20);
}
private function getFileKey(string $file): string
{
return '';
}
private function scanHashDir(string $directory): \Generator
{
if (!is_dir($directory)) {
return;
}
$chars = '+-ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
for ($i = 0; $i < 38; ++$i) {
if (!is_dir($directory.$chars[$i])) {
continue;
}
for ($j = 0; $j < 38; ++$j) {
if (!is_dir($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(int $type, string $message, string $file, int $line)
{
throw new \ErrorException($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 !== $this->tmp && is_file($this->tmp)) {
unlink($this->tmp);
}
}
}
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