FilesystemTrait.php
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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\CacheException;
/**
* @author Nicolas Grekas <p@tchwork.com>
* @author Rob Frawley 2nd <rmf@src.run>
*
* @internal
*/
trait FilesystemTrait
{
use FilesystemCommonTrait;
private $marshaller;
/**
* @return bool
*/
public function prune()
{
$time = time();
$pruned = true;
foreach ($this->scanHashDir($this->directory) as $file) {
if (!$h = @fopen($file, 'r')) {
continue;
}
if (($expiresAt = (int) fgets($h)) && $time >= $expiresAt) {
fclose($h);
$pruned = @unlink($file) && !file_exists($file) && $pruned;
} else {
fclose($h);
}
}
return $pruned;
}
/**
* {@inheritdoc}
*/
protected function doFetch(array $ids)
{
$values = [];
$now = time();
foreach ($ids as $id) {
$file = $this->getFile($id);
if (!is_file($file) || !$h = @fopen($file, 'r')) {
continue;
}
if (($expiresAt = (int) fgets($h)) && $now >= $expiresAt) {
fclose($h);
@unlink($file);
} else {
$i = rawurldecode(rtrim(fgets($h)));
$value = stream_get_contents($h);
fclose($h);
if ($i === $id) {
$values[$id] = $this->marshaller->unmarshall($value);
}
}
}
return $values;
}
/**
* {@inheritdoc}
*/
protected function doHave(string $id)
{
$file = $this->getFile($id);
return is_file($file) && (@filemtime($file) > time() || $this->doFetch([$id]));
}
/**
* {@inheritdoc}
*/
protected function doSave(array $values, int $lifetime)
{
$expiresAt = $lifetime ? (time() + $lifetime) : 0;
$values = $this->marshaller->marshall($values, $failed);
foreach ($values as $id => $value) {
if (!$this->write($this->getFile($id, true), $expiresAt."\n".rawurlencode($id)."\n".$value, $expiresAt)) {
$failed[] = $id;
}
}
if ($failed && !is_writable($this->directory)) {
throw new CacheException(sprintf('Cache directory is not writable (%s).', $this->directory));
}
return $failed;
}
private function getFileKey(string $file): string
{
if (!$h = @fopen($file, 'r')) {
return '';
}
fgets($h); // expiry
$encodedKey = fgets($h);
fclose($h);
return rawurldecode(rtrim($encodedKey));
}
}