Get folder path instead of url path

You cannot reach WRITEPATH from public folder. You should do this instead:

PHP Code:

    public function downloadReport($id, $numero)
    {
        $file = WRITEPATH . 'uploads/report/' . $id . '/' . $numero;
        $data = file_get_contents($file);
        $this->response->setHeader('Content-Type', mime_content_type($file));
        $this->response->setHeader('Content-Disposition', 'attachment; filename="'.$numero.'"');
        return $this->response->setBody($data);
    }