sessionexpander.php

<?php
namespace Bitrix\Main\UI;
 
use Bitrix\Main\Security\Sign;
use Bitrix\Main\Config;
use Bitrix\Main\Localization\Loc;
 
class SessionExpander
{
    public static function init()
    {
        global $USER;
 
        $sessid = bitrix_sessid();
 
        $signer = new Sign\Signer();
        $signedSessId = $signer->sign($sessid, static::getSalt());
 
        \CJSCore::Init(['ajax', 'ls']);
 
        $jsCode = '<script type="text/javascript">'."\n";
 
        $showMess = ($USER->IsAuthorized() && Config\Option::get("main", "session_show_message", "Y") <> "N");
        if($showMess)
        {
            $policy = $USER->GetSecurityPolicy();
            $message = \CUtil::JSEscape(Loc::getMessage("MAIN_SESS_MESS", array("#TIMEOUT#" => (int)$policy["SESSION_TIMEOUT"])));
            $jsCode .= 'BX.message({"SessExpired": \''.$message.'\'});'."\n";
        }
 
        $jsCode .= 'bxSession.Expand(\''.$signedSessId.'\');'."\n".'</script>';
 
        $asset = \Bitrix\Main\Page\Asset::getInstance();
        $asset->addJs('/bitrix/js/main/session.js');
        $asset->addString($jsCode);
    }
 
    public static function getSignedValue($signedParam)
    {
        try
        {
            $signer = new Sign\Signer();
            $string = $signer->unsign($signedParam, static::getSalt());
            return $string;
        }
        catch(\Bitrix\Main\SystemException $exception)
        {
            return false;
        }
    }
 
    protected static function getSalt()
    {
        global $USER;
 
        $context = \Bitrix\Main\Context::getCurrent();
 
        return md5(
            $context->getRequest()->getCookie("UIDH").
            "|".$USER->GetID().
            "|".$context->getServer()->getRemoteAddr()
        );
    }
}