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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\HttpFoundation\Session\Storage\Handler;
use Predis\Response\ErrorInterface;
use Symfony\Component\Cache\Traits\RedisClusterProxy;
use Symfony\Component\Cache\Traits\RedisProxy;
/**
* Redis based session storage handler based on the Redis class
* provided by the PHP redis extension.
*
* @author Dalibor Karlović <dalibor@flexolabs.io>
*/
class RedisSessionHandler extends AbstractSessionHandler
{
private $redis;
/**
* @var string Key prefix for shared environments
*/
private $prefix;
/**
* @var int Time to live in seconds
*/
private $ttl;
/**
* List of available options:
* * prefix: The prefix to use for the keys in order to avoid collision on the Redis server
* * ttl: The time to live in seconds.
*
* @param \Redis|\RedisArray|\RedisCluster|\Predis\ClientInterface|RedisProxy|RedisClusterProxy $redis
*
* @throws \InvalidArgumentException When unsupported client or options are passed
*/
public function __construct($redis, array $options = [])
{
if (
!$redis instanceof \Redis &&
!$redis instanceof \RedisArray &&
!$redis instanceof \RedisCluster &&
!$redis instanceof \Predis\ClientInterface &&
!$redis instanceof RedisProxy &&
!$redis instanceof RedisClusterProxy
) {
throw new \InvalidArgumentException(sprintf('"%s()" expects parameter 1 to be Redis, RedisArray, RedisCluster or Predis\ClientInterface, "%s" given.', __METHOD__, get_debug_type($redis)));
}
if ($diff = array_diff(array_keys($options), ['prefix', 'ttl'])) {
throw new \InvalidArgumentException(sprintf('The following options are not supported "%s".', implode(', ', $diff)));
}
$this->redis = $redis;
$this->prefix = $options['prefix'] ?? 'sf_s';
$this->ttl = $options['ttl'] ?? null;
}
/**
* {@inheritdoc}
*/
protected function doRead(string $sessionId): string
{
return $this->redis->get($this->prefix.$sessionId) ?: '';
}
/**
* {@inheritdoc}
*/
protected function doWrite(string $sessionId, string $data): bool
{
$result = $this->redis->setEx($this->prefix.$sessionId, (int) ($this->ttl ?? ini_get('session.gc_maxlifetime')), $data);
return $result && !$result instanceof ErrorInterface;
}
/**
* {@inheritdoc}
*/
protected function doDestroy(string $sessionId): bool
{
static $unlink = true;
if ($unlink) {
try {
$unlink = false !== $this->redis->unlink($this->prefix.$sessionId);
} catch (\Throwable $e) {
$unlink = false;
}
}
if (!$unlink) {
$this->redis->del($this->prefix.$sessionId);
}
return true;
}
/**
* {@inheritdoc}
*/
public function close(): bool
{
return true;
}
/**
* {@inheritdoc}
*/
public function gc($maxlifetime): bool
{
return true;
}
/**
* @return bool
*/
public function updateTimestamp($sessionId, $data)
{
return (bool) $this->redis->expire($this->prefix.$sessionId, (int) ($this->ttl ?? ini_get('session.gc_maxlifetime')));
}
}