HeaderBasedDeliveryHelper.php

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<?php

namespace ILIAS\FileDelivery\FileDeliveryTypes;

trait HeaderBasedDeliveryHelper
{

    protected function sendFileUnbufferedUsingHeaders(\Closure $closure)
    {
        ignore_user_abort(true);
        set_time_limit(0);
        ob_start();

        $closure();

        ob_flush();
        ob_end_flush();
        flush();
    }
}