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AbstractSessionHandler.php
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173 lines (142 loc) · 3.8 KB
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<?php
/*
* This file is part of php-cache organization.
*
* (c) 2015 Aaron Scherer <aequasi@gmail.com>, Tobias Nyholm <tobias.nyholm@gmail.com>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace Cache\SessionHandler;
/**
* @author Daniel Bannert <d.bannert@anolilab.de>
*
* ported from https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/AbstractSessionHandler.php
*/
abstract class AbstractSessionHandler implements \SessionHandlerInterface, \SessionUpdateTimestampHandlerInterface
{
/**
* @type string|null
*/
private $sessionName;
/**
* @type string|null
*/
private $prefetchId;
/**
* @type string|null
*/
private $prefetchData;
/**
* @type string|null
*/
private $newSessionId;
/**
* @type string|null
*/
private $igbinaryEmptyData;
/**
* {@inheritdoc}
*/
public function open($savePath, $sessionName)
{
$this->sessionName = $sessionName;
return true;
}
/**
* {@inheritdoc}
*/
public function validateId($sessionId)
{
$this->prefetchData = $this->read($sessionId);
$this->prefetchId = $sessionId;
return $this->prefetchData !== '';
}
/**
* {@inheritdoc}
*/
public function read($sessionId)
{
if ($this->prefetchId !== null) {
$prefetchId = $this->prefetchId;
$prefetchData = $this->prefetchData;
$this->prefetchId = $this->prefetchData = null;
if ($prefetchId === $sessionId || '' === $prefetchData) {
$this->newSessionId = '' === $prefetchData ? $sessionId : null;
return $prefetchData;
}
}
$data = $this->doRead($sessionId);
$this->newSessionId = '' === $data ? $sessionId : null;
if (\PHP_VERSION_ID < 70000) {
$this->prefetchData = $data;
}
return $data;
}
/**
* {@inheritdoc}
*/
public function write($sessionId, $data)
{
if (\PHP_VERSION_ID < 70000 && $this->prefetchData) {
$readData = $this->prefetchData;
$this->prefetchData = null;
if ($readData === $data) {
return $this->updateTimestamp($sessionId, $data);
}
}
if ($this->igbinaryEmptyData === null) {
// see igbinary/igbinary/issues/146
$this->igbinaryEmptyData = \function_exists('igbinary_serialize') ? igbinary_serialize([]) : '';
}
if ($data === '' || $this->igbinaryEmptyData === $data) {
return $this->destroy($sessionId);
}
$this->newSessionId = null;
return $this->doWrite($sessionId, $data);
}
/**
* {@inheritdoc}
*/
public function destroy($sessionId)
{
if (\PHP_VERSION_ID < 70000) {
$this->prefetchData = null;
}
return $this->newSessionId === $sessionId || $this->doDestroy($sessionId);
}
/**
* {@inheritdoc}
*/
public function close()
{
return true;
}
/**
* {@inheritdoc}
*/
public function gc($lifetime)
{
// not required here because cache will auto expire the records anyhow.
return true;
}
/**
* @param string $sessionId
*
* @return string
*/
abstract protected function doRead($sessionId);
/**
* @param string $sessionId
* @param string $data
*
* @return bool
*/
abstract protected function doWrite($sessionId, $data);
/**
* @param string $sessionId
*
* @return bool
*/
abstract protected function doDestroy($sessionId);
}