httpcontext.php

См. документацию.

<?php
 
namespace Bitrix\Main;

class HttpContext extends Context
{
    public const CACHE_TTL = 86400;

    public function __construct(HttpApplication $application)
    {
        parent::__construct($application);
    }
 
    public function rewriteUri($url, $queryString, $redirectStatus = null)
    {
        $request = $this->request;
        $request->modifyByQueryString($queryString);
 
        $this->server->rewriteUri($url, $queryString, $redirectStatus);
    }
 
    public function transferUri($url, $queryString)
    {
        $request = $this->request;
        $request->modifyByQueryString($queryString);
 
        $this->server->transferUri($url, $queryString);
    }

    public function initializeCulture($definedSite = null, $definedLanguage = null): void
    {
        $request = $this->getRequest();
 
        $language = null;
        $culture = null;
        $site = null;
 
        if ($definedSite === null && $request->isAdminSection())
        {
            $lang = $request->get('lang');
            if ($lang == '')
            {
                $lang = Config\Option::get('main', 'admin_lid', 'ru');
            }
 
            if ($lang != '')
            {
                $language = Localization\LanguageTable::getList([
                    'filter' => ['=LID' => $lang, '=ACTIVE' => 'Y'],
                    'cache' => ['ttl' => static::CACHE_TTL],
                ])->fetchObject();
            }
 
            if (!$language)
            {
                // no language found - get default
                $language = Localization\LanguageTable::getList([
                    'filter' => ['=ACTIVE' => 'Y'],
                    'order' => ['DEF' => 'DESC'],
                    'cache' => ['ttl' => static::CACHE_TTL],
                ])->fetchObject();
            }
 
            if ($language)
            {
                $culture = Localization\CultureTable::getByPrimary($language->getCultureId(), ['cache' => ['ttl' => static::CACHE_TTL]])->fetchObject();
            }
        }
        else
        {
            if ($definedSite !== null)
            {
                $site = SiteTable::getByPrimary($definedSite, ['cache' => ['ttl' => static::CACHE_TTL]])->fetch();
                if (!$site)
                {
                    throw new SystemException('Incorrect site: ' . $definedSite . '.');
                }
            }
            else
            {
                // get the site by domain or path
                $site = SiteTable::getByDomain($request->getHttpHost(), $request->getRequestedPageDirectory());
            }
 
            if ($site)
            {
                $languageId = $definedLanguage ?? $site['LANGUAGE_ID'];
                $language = Localization\LanguageTable::getByPrimary($languageId, ['cache' => ['ttl' => static::CACHE_TTL]])->fetchObject();
 
                $culture = Localization\CultureTable::getByPrimary($site['CULTURE_ID'], ['cache' => ['ttl' => static::CACHE_TTL]])->fetchObject();
            }
        }
 
        if ($culture === null || $language === null)
        {
            throw new SystemException("Culture not found, or there are no active sites or languages.");
        }
 
        $this->setLanguage($language);
        $this->setCulture($culture);
 
        if ($site)
        {
            $this->setSite(SiteTable::wakeUpObject($site));
        }
    }
}