Mercurial > hg > isophonics-drupal-site
view core/lib/Drupal/Core/Session/WriteSafeSessionHandler.php @ 18:af1871eacc83
Update to Drupal core 8.7.1
author | Chris Cannam |
---|---|
date | Thu, 09 May 2019 15:33:08 +0100 |
parents | 4c8ae668cc8c |
children |
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<?php namespace Drupal\Core\Session; /** * Wraps the session handler to prevent writes when not necessary or allowed. */ class WriteSafeSessionHandler implements \SessionHandlerInterface, WriteSafeSessionHandlerInterface { /** * @var \SessionHandlerInterface */ protected $wrappedSessionHandler; /** * Whether or not the session is enabled for writing. * * @var bool */ protected $sessionWritable; /** * The read sessions. * * @var array * Session data keyed by the session ID. */ private $readSessions; /** * Constructs a new write safe session handler. * * @param \SessionHandlerInterface $wrapped_session_handler * The underlying session handler. * @param bool $session_writable * Whether or not the session should be initially writable. */ public function __construct(\SessionHandlerInterface $wrapped_session_handler, $session_writable = TRUE) { $this->wrappedSessionHandler = $wrapped_session_handler; $this->sessionWritable = $session_writable; } /** * {@inheritdoc} */ public function close() { return $this->wrappedSessionHandler->close(); } /** * {@inheritdoc} */ public function destroy($session_id) { return $this->wrappedSessionHandler->destroy($session_id); } /** * {@inheritdoc} */ public function gc($max_lifetime) { return $this->wrappedSessionHandler->gc($max_lifetime); } /** * {@inheritdoc} */ public function open($save_path, $session_id) { return $this->wrappedSessionHandler->open($save_path, $session_id); } /** * {@inheritdoc} */ public function read($session_id) { $value = $this->wrappedSessionHandler->read($session_id); $this->readSessions[$session_id] = $value; return $value; } /** * {@inheritdoc} */ public function write($session_id, $session_data) { // Only write the session when it has been modified. if (isset($this->readSessions[$session_id]) && $this->readSessions[$session_id] === $session_data) { return TRUE; } if ($this->isSessionWritable()) { return $this->wrappedSessionHandler->write($session_id, $session_data); } return TRUE; } /** * {@inheritdoc} */ public function setSessionWritable($flag) { $this->sessionWritable = (bool) $flag; } /** * {@inheritdoc} */ public function isSessionWritable() { return $this->sessionWritable; } }