session_mc.php

См. документацию.

<?

class CSecuritySessionMC
{
    protected static $connection = null;
    protected static $sessionId = null;
    protected static $isReadOnly = false;
    protected static $isSessionReady = false;
    protected static $hasFailedRead = false;
    public static function Init()
    {
        if(self::isConnected())
            return true;
 
        self::$isReadOnly = defined('BX_SECURITY_SESSION_READONLY');
 
        return self::newConnection();
    }

    public static function open($savePath, $sessionName)
    {
        return CSecuritySessionMC::Init();
    }

    public static function close()
    {
        if(!self::isConnected() || !self::isValidId(self::$sessionId))
            return false;
 
        if (!self::$isReadOnly && self::$isSessionReady)
        {
            if(isSessionExpired())
                self::destroy(self::$sessionId);
 
            self::$connection->replace(self::getPrefix().self::$sessionId.".lock", 0, 0, 1);
        }
 
        self::$sessionId = null;
        self::closeConnection();
        return true;
    }

    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, $lockTimeout))
            {
                if(self::$connection->increment($sid.$id.".lock", 1) === 1)
                {
                    self::$connection->replace($sid.$id.".lock", $lock, 0, $lockTimeout);
                    break;
                }
                usleep($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".', $lockedUri);
                    }
 
                    CSecuritySession::triggerFatalError($errorText);
                }
 
                if($waitStep < 1000000)
                    $waitStep *= 2;
            }
        }
 
        self::$sessionId = $id;
        self::$isSessionReady = true;
        $res = self::$connection->get($sid.$id);
        if($res === false)
        {
            if (!self::$hasFailedRead)
            {
                AddEventHandler("main", "OnPageStart", array("CSecuritySession", "UpdateSessID"));
                self::$hasFailedRead = true;
            }
            $res = "";
        }
 
        return $res;
    }

    public static function write($id, $sessionData)
    {
        if(!self::isConnected() || !self::isValidId($id))
            return false;
 
        if (!self::$isSessionReady)
            return false;
 
        if (self::$isReadOnly)
        {
            if (!CSecuritySession::isOldSessionIdExist())
            {
                return true;
            }
        }
 
        $sid = self::getPrefix();
        $maxLifetime = intval(ini_get("session.gc_maxlifetime"));
 
        if(CSecuritySession::isOldSessionIdExist())
        {
            $oldSessionId = CSecuritySession::getOldSessionId(true);
            self::$connection->replace($sid.$oldSessionId, "", 0, 1);
        }
 
        self::$connection->set($sid.$id, $sessionData, 0, $maxLifetime);
 
        return true;
    }

    public static function destroy($id)
    {
        if(!self::isValidId($id))
            return false;
 
        if (!self::$isSessionReady)
            return false;
 
        if (self::$isReadOnly)
            return false;
 
        $isConnectionRestored = false;
        if(!self::isConnected())
            $isConnectionRestored = self::newConnection();
 
        if(!self::isConnected())
            return false;
 
        $sid = self::getPrefix();
        self::$connection->replace($sid.$id, "", 0, 1);
 
        if(CSecuritySession::isOldSessionIdExist())
            self::$connection->replace($sid.CSecuritySession::getOldSessionId(true), "", 0, 1);
 
        if($isConnectionRestored)
            self::closeConnection();
 
        return true;
    }

    public static function gc($maxLifeTime)
    {
        return true;
    }

    public static function isStorageEnabled()
    {
        return defined("BX_SECURITY_SESSION_MEMCACHE_HOST");
    }

    protected static function isConnected()
    {
        return self::$connection !== null;
    }

    protected static function isValidId($pId)
    {
        return (
            $pId
            && is_string($pId)
            && preg_match('/^[\da-z\-,]{6,}$/iD', $pId)
        );
    }

    protected static function getPrefix()
    {
        return defined("BX_CACHE_SID")? BX_CACHE_SID: "BX";
    }

    protected static function newConnection()
    {
        $result = false;
        $exception = null;
 
        if (!extension_loaded('memcache'))
        {
            $result = false;
            $exception = new \ErrorException("memcache extention not loaded.", 0, E_USER_ERROR, __FILE__, __LINE__);
        }
 
        if (!$exception)
        {
            if (!self::isStorageEnabled())
            {
                $result = false;
                $exception = new \ErrorException("BX_SECURITY_SESSION_MEMCACHE_HOST constant is not defined.", 0, E_USER_ERROR, __FILE__, __LINE__);
            }
        }
 
        if (!$exception)
        {
            $port = defined("BX_SECURITY_SESSION_MEMCACHE_PORT")? intval(BX_SECURITY_SESSION_MEMCACHE_PORT): 11211;
            self::$connection = new Memcache;
            $result = self::$connection->pconnect(BX_SECURITY_SESSION_MEMCACHE_HOST, $port);
            if (!$result)
            {
                $error = error_get_last();
                if ($error && $error["type"] == E_WARNING)
                {
                    $exception = new \ErrorException($error['message'], 0, $error['type'], $error['file'], $error['line']);
                }
            }
        }
 
        if ($exception)
        {
            $application = \Bitrix\Main\Application::getInstance();
            $exceptionHandler = $application->getExceptionHandler();
            $exceptionHandler->writeToLog($exception);
        }
 
        return $result;
    }
 
    protected static function closeConnection()
    {
        self::$connection->close();
        self::$connection = null;
    }
 
}