Cách tải xuống tệp laravel với Ví dụ

/** @param \Illuminate\Http\Request  $request
 * @return \Illuminate\Auth\Access\Response */
public function download[Request $request]
{
    $file = public_path[]. "/images/test.jpg";
    $headers = ['Content-Type: image/jpeg'];
    if [file_exists[$file]] {
        return \Response::download[$file, 'plugin.jpg', $headers];
    } else {
        echo['File not found.'];
    }
}