<?php
class Firewall implements HttpKernelInterfaceForClientIp {
    protected $parent = null;
    public function __construct(<HttpKernelInterfaceForClientIp> $parent) {
        $this->parent = $parent;
    }
    public function handle(<RequestGetClientIp> $request, $type = self::MASTER_REQUEST, $catch = true) {
        if ($request->getClientIp() === '127.0.0.1') {
            return $this->parent->handle($request);
        }
        throw new Exception('Not Authorized');
    }
}
?>