112 lines
4.0 KiB
PHP
112 lines
4.0 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\HttpFoundation\Session\Storage\Handler;
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use Symfony\Component\HttpFoundation\Session\SessionUtils;
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/**
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* This abstract session handler provides a generic implementation
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* of the PHP 7.0 SessionUpdateTimestampHandlerInterface,
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* enabling strict and lazy session handling.
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*
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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abstract class AbstractSessionHandler implements \SessionHandlerInterface, \SessionUpdateTimestampHandlerInterface
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{
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private string $sessionName;
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private string $prefetchId;
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private string $prefetchData;
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private ?string $newSessionId = null;
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private string $igbinaryEmptyData;
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public function open(string $savePath, string $sessionName): bool
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{
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$this->sessionName = $sessionName;
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if (!headers_sent() && !\ini_get('session.cache_limiter') && '0' !== \ini_get('session.cache_limiter')) {
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header(\sprintf('Cache-Control: max-age=%d, private, must-revalidate', 60 * (int) \ini_get('session.cache_expire')));
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}
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return true;
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}
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abstract protected function doRead(#[\SensitiveParameter] string $sessionId): string;
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abstract protected function doWrite(#[\SensitiveParameter] string $sessionId, string $data): bool;
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abstract protected function doDestroy(#[\SensitiveParameter] string $sessionId): bool;
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public function validateId(#[\SensitiveParameter] string $sessionId): bool
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{
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$this->prefetchData = $this->read($sessionId);
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$this->prefetchId = $sessionId;
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return '' !== $this->prefetchData;
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}
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public function read(#[\SensitiveParameter] string $sessionId): string
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{
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if (isset($this->prefetchId)) {
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$prefetchId = $this->prefetchId;
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$prefetchData = $this->prefetchData;
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unset($this->prefetchId, $this->prefetchData);
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if ($prefetchId === $sessionId || '' === $prefetchData) {
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$this->newSessionId = '' === $prefetchData ? $sessionId : null;
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return $prefetchData;
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}
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}
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$data = $this->doRead($sessionId);
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$this->newSessionId = '' === $data ? $sessionId : null;
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return $data;
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}
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public function write(#[\SensitiveParameter] string $sessionId, string $data): bool
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{
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// see https://github.com/igbinary/igbinary/issues/146
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$this->igbinaryEmptyData ??= \function_exists('igbinary_serialize') ? igbinary_serialize([]) : '';
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if ('' === $data || $this->igbinaryEmptyData === $data) {
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return $this->destroy($sessionId);
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}
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$this->newSessionId = null;
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return $this->doWrite($sessionId, $data);
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}
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public function destroy(#[\SensitiveParameter] string $sessionId): bool
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{
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if (!headers_sent() && filter_var(\ini_get('session.use_cookies'), \FILTER_VALIDATE_BOOL)) {
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if (!isset($this->sessionName)) {
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throw new \LogicException(\sprintf('Session name cannot be empty, did you forget to call "parent::open()" in "%s"?.', static::class));
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}
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$cookie = SessionUtils::popSessionCookie($this->sessionName, $sessionId);
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/*
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* We send an invalidation Set-Cookie header (zero lifetime)
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* when either the session was started or a cookie with
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* the session name was sent by the client (in which case
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* we know it's invalid as a valid session cookie would've
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* started the session).
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*/
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if (null === $cookie || isset($_COOKIE[$this->sessionName])) {
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$params = session_get_cookie_params();
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unset($params['lifetime']);
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setcookie($this->sessionName, '', $params);
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}
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}
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return $this->newSessionId === $sessionId || $this->doDestroy($sessionId);
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}
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}
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