appwrite/app/controllers/shared/web.php

<?php

use Utopia\App;
use Utopia\Config\Config;

App::init(function ($utopia, $request, $response, $layout) {
    /** @var Utopia\App $utopia */
    /** @var Utopia\Swoole\Request $request */
    /** @var Appwrite\Utopia\Response $response */
    /** @var Utopia\View $layout */

    /* AJAX check  */
    if (!empty($request->getQuery('version', ''))) {
        $layout->setPath(__DIR__ . '/../../views/layouts/empty.phtml');
    }

    $port = $request->getPort();
    $protocol = $request->getProtocol();
    $domain = $request->getHostname();

    $layout
        ->setParam('title', APP_NAME)
        ->setParam('protocol', $protocol)
        ->setParam('domain', $domain)
        ->setParam('endpoint', $protocol . '://' . $domain . ($port != 80 && $port != 443 ? ':' . $port : ''))
        ->setParam('home', App::getEnv('_APP_HOME'))
        ->setParam('setup', App::getEnv('_APP_SETUP'))
        ->setParam('class', 'unknown')
        ->setParam('icon', '/images/favicon.png')
        ->setParam('roles', [
            ['type' => 'owner', 'label' => 'Owner'],
            ['type' => 'developer', 'label' => 'Developer'],
            ['type' => 'admin', 'label' => 'Admin'],
        ])
        ->setParam('runtimes', Config::getParam('runtimes'))
        ->setParam('mode', App::getMode())
    ;

    $time = (60 * 60 * 24 * 45); // 45 days cache

    $response
        ->addHeader('Cache-Control', 'public, max-age=' . $time)
        ->addHeader('Expires', \date('D, d M Y H:i:s', \time() + $time) . ' GMT') // 45 days cache
        ->addHeader('X-Frame-Options', 'SAMEORIGIN') // Avoid console and homepage from showing in iframes
        ->addHeader('X-XSS-Protection', '1; mode=block; report=/v1/xss?url=' . \urlencode($request->getURI()))
        ->addHeader('X-UA-Compatible', 'IE=Edge') // Deny IE browsers from going into quirks mode
    ;

    $route = $utopia->match($request);
    $scope = $route->getLabel('scope', '');
    $layout
        ->setParam('version', App::getEnv('_APP_VERSION', 'UNKNOWN'))
        ->setParam('isDev', App::isDevelopment())
        ->setParam('class', $scope)
    ;
}, ['utopia', 'request', 'response', 'layout'], 'web');