source/app/Http/Middleware/SecurityHeaders.php


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<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class SecurityHeaders
{
    /**
     * Handle an incoming request.
     *
     * @param Closure(Request): (Response) $next
     */
    public function handle(Request $request, Closure $next): Response
    {
        $response = $next($request);

        // Set security headers
        $response->headers->set('Cache-Control', 'no-store, max-age=0');
        $response->headers->set('Content-Security-Policy', "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self'; connect-src 'self'; frame-ancestors 'none';");
        $response->headers->set('Cross-Origin-Opener-Policy', 'same-origin');
        $response->headers->set('Cross-Origin-Resource-Policy', 'same-origin');
        $response->headers->set('permitted-cross-domain-policies', 'none');
        $response->headers->set('Permissions-Policy', 'geolocation=(), microphone=(), camera=()');
        $response->headers->set('X-Content-Type-Options', 'nosniff');
        $response->headers->set('X-Frame-Options', 'deny');
        $response->headers->set('X-Permitted-Cross-Domain-Policies', 'none');

        // source: https://owasp.org/www-project-secure-headers/ci/headers_add.json
        return $response;
    }
}