redirect.php

См. документацию.

<?php
 
namespace Bitrix\Main\Engine\Response;
 
use Bitrix\Main;
use Bitrix\Main\Context;
use Bitrix\Main\Web\Uri;
 
class Redirect extends Main\HttpResponse
{
    private $url;
    private $skipSecurity;
 
    public function __construct($url, bool $skipSecurity = false)
    {
        parent::__construct();
 
        $this
            ->setStatus('302 Found')
            ->setSkipSecurity($skipSecurity)
            ->setUrl($url)
        ;
    }

    public function getUrl()
    {
        return $this->url;
    }

    public function setUrl($url)
    {
        $this->url = (string)$url;
 
        return $this;
    }

    public function isSkippedSecurity(): bool
    {
        return $this->skipSecurity;
    }

    public function setSkipSecurity(bool $skipSecurity)
    {
        $this->skipSecurity = $skipSecurity;
 
        return $this;
    }
 
    private function checkTrial(): bool
    {
        $isTrial =
            defined("DEMO") && DEMO === "Y" &&
            (
                !defined("SITEEXPIREDATE") ||
                !defined("OLDSITEEXPIREDATE") ||
                SITEEXPIREDATE == '' ||
                SITEEXPIREDATE != OLDSITEEXPIREDATE
            )
        ;
 
        return $isTrial;
    }
 
    private function isExternalUrl($url): bool
    {
        return preg_match("'^(http://|https://|ftp://)'i", $url);
    }
 
    private function modifyBySecurity($url)
    {
        global $APPLICATION;
 
        $isExternal = $this->isExternalUrl($url);
        if (!$isExternal && !str_starts_with($url, "/"))
        {
            $url = $APPLICATION->GetCurDir() . $url;
        }
        if ($isExternal)
        {
            // normalizes user info part of the url
            $url = (string)(new Uri($this->url));
        }
        //doubtful about &amp; and http response splitting defence
        $url = str_replace(["&amp;", "\r", "\n"], ["&", "", ""], $url);
 
        return $url;
    }
 
    private function processInternalUrl($url)
    {
        global $APPLICATION;
        //store cookies for next hit (see CMain::GetSpreadCookieHTML())
        $APPLICATION->StoreCookies();
 
        $server = Context::getCurrent()->getServer();
        $protocol = Context::getCurrent()->getRequest()->isHttps() ? "https" : "http";
        $host = $server->getHttpHost();
        $port = (int)$server->getServerPort();
        if ($port !== 80 && $port !== 443 && $port > 0 && !str_contains($host, ":"))
        {
            $host .= ":" . $port;
        }
 
        return "{$protocol}://{$host}{$url}";
    }
 
    public function send()
    {
        if ($this->checkTrial())
        {
            die(Main\Localization\Loc::getMessage('MAIN_ENGINE_REDIRECT_TRIAL_EXPIRED'));
        }
 
        $url = $this->getUrl();
        $isExternal = $this->isExternalUrl($url);
        $url = $this->modifyBySecurity($url);
 
        
        foreach (GetModuleEvents("main", "OnBeforeLocalRedirect", true) as $event)
        {
            ExecuteModuleEventEx($event, [&$url, $this->isSkippedSecurity(), &$isExternal, $this]);
        }
 
        if (!$isExternal)
        {
            $url = $this->processInternalUrl($url);
        }
 
        $this->addHeader('Location', $url);
        foreach (GetModuleEvents("main", "OnLocalRedirect", true) as $event)
        {
            ExecuteModuleEventEx($event);
        }
 
        Main\Application::getInstance()->getKernelSession()["BX_REDIRECT_TIME"] = time();
 
        parent::send();
    }
}