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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\Bridge\Doctrine\HttpFoundation;
use Doctrine\DBAL\Platforms\MySqlPlatform;
use Doctrine\DBAL\Driver\Connection;
/**
* DBAL based session storage.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class DbalSessionHandler implements \SessionHandlerInterface
{
/**
* @var Connection
*/
private $con;
/**
* @var string
*/
private $tableName;
/**
* Constructor.
*
* @param Connection $con An instance of Connection.
* @param string $tableName Table name.
*/
public function __construct(Connection $con, $tableName = 'sessions')
{
$this->con = $con;
$this->tableName = $tableName;
}
/**
* {@inheritdoc}
*/
public function open($path = null, $name = null)
{
return true;
}
/**
* {@inheritdoc}
*/
public function close()
{
// do nothing
return true;
}
/**
* {@inheritdoc}
*/
public function destroy($id)
{
try {
$this->con->executeQuery("DELETE FROM {$this->tableName} WHERE sess_id = :id", array(
'id' => $id,
));
} catch (\PDOException $e) {
throw new \RuntimeException(sprintf('PDOException was thrown when trying to manipulate session data: %s', $e->getMessage()), 0, $e);
}
return true;
}
/**
* {@inheritdoc}
*/
public function gc($lifetime)
{
try {
$this->con->executeQuery("DELETE FROM {$this->tableName} WHERE sess_time < :time", array(
'time' => time() - $lifetime,
));
} catch (\PDOException $e) {
throw new \RuntimeException(sprintf('PDOException was thrown when trying to manipulate session data: %s', $e->getMessage()), 0, $e);
}
return true;
}
/**
* {@inheritdoc}
*/
public function read($id)
{
try {
$data = $this->con->executeQuery("SELECT sess_data FROM {$this->tableName} WHERE sess_id = :id", array(
'id' => $id,
))->fetchColumn();
if (false !== $data) {
return base64_decode($data);
}
// session does not exist, create it
$this->createNewSession($id);
return '';
} catch (\PDOException $e) {
throw new \RuntimeException(sprintf('PDOException was thrown when trying to read the session data: %s', $e->getMessage()), 0, $e);
}
}
/**
* {@inheritdoc}
*/
public function write($id, $data)
{
$platform = $this->con->getDatabasePlatform();
// this should maybe be abstracted in Doctrine DBAL
if ($platform instanceof MySqlPlatform) {
$sql = "INSERT INTO {$this->tableName} (sess_id, sess_data, sess_time) VALUES (%1\$s, %2\$s, %3\$d) "
."ON DUPLICATE KEY UPDATE sess_data = VALUES(sess_data), sess_time = CASE WHEN sess_time = %3\$d THEN (VALUES(sess_time) + 1) ELSE VALUES(sess_time) END";
} else {
$sql = "UPDATE {$this->tableName} SET sess_data = %2\$s, sess_time = %3\$d WHERE sess_id = %1\$s";
}
try {
$rowCount = $this->con->exec(sprintf(
$sql,
$this->con->quote($id),
//session data can contain non binary safe characters so we need to encode it
$this->con->quote(base64_encode($data)),
time()
));
if (!$rowCount) {
// No session exists in the database to update. This happens when we have called
// session_regenerate_id()
$this->createNewSession($id, $data);
}
} catch (\PDOException $e) {
throw new \RuntimeException(sprintf('PDOException was thrown when trying to write the session data: %s', $e->getMessage()), 0, $e);
}
return true;
}
/**
* Creates a new session with the given $id and $data
*
* @param string $id
* @param string $data
*
* @return Boolean
*/
private function createNewSession($id, $data = '')
{
$this->con->exec(sprintf("INSERT INTO {$this->tableName} (sess_id, sess_data, sess_time) VALUES (%s, %s, %d)",
$this->con->quote($id),
//session data can contain non binary safe characters so we need to encode it
$this->con->quote(base64_encode($data)),
time()
));
return true;
}
}