/**
* @param string $id - session id, must be valid hash
* @return string
*/
public static function read($id)
{
if(!self::isConnected() || !self::isValidId($id))
return "";
$sid = self::getPrefix();
if (!self::$isReadOnly)
{
$lockTimeout = 55;//TODO: add setting
$lockWait = 59000000;//micro seconds = 60 seconds TODO: add setting
$waitStep = 100;
if (defined('BX_SECURITY_SESSION_MEMCACHE_EXLOCK') && BX_SECURITY_SESSION_MEMCACHE_EXLOCK)
$lock = Bitrix\Main\Context::getCurrent()->getRequest()->getRequestedPage();
else
$lock = 1;
while(!self::$connection->add($sid.$id.".lock", $lock, 0, $lockTimeout))
{
usleep($waitStep);
$lockWait -= $waitStep;
if($lockWait < 0)
{
$errorText = 'Unable to get session lock within 60 seconds.';
if ($lock !== 1)
{
$lockedUri = self::$connection->get($sid.$id.".lock");
if ($lockedUri && $lockedUri != 1)
$errorText .= sprintf(' Locked by "%s".', self::$connection->get($sid.$id.".lock"));
}
CSecuritySession::triggerFatalError($errorText);
}
if($waitStep < 1000000)
$waitStep *= 2;
}
}
self::$sessionId = $id;
self::$isSessionReady = true;
$res = self::$connection->get($sid.$id);
if($res === false)
$res = "";
return $res;
}
