Response::downloadを使用してLaravelでファイルをダウンロードする方法?

$file= public_path(). "/download/info.pdf";

<button class="btn btn-large pull-right" data-href="/download" id="downloadBtn">
    <i class="icon-download-alt"></i> Download Brochure
</button>

$(document).ready(function() {
    $('#downloadBtn').click(function() {
        $.ajax({
            url: $(this).data('href'),
            success: function() {
                alert('File downloaded successfully!');
            },
            error: function() {
                alert('Error downloading file!');
            }
        });
    });
});

public function getDownload()
{
    // Same code as before, but now it returns a JSON response
    return response()->json([
        'success' => true,
        'message' => 'File downloaded successfully!'
    ]);
}

$headers = [
    'Content-Type' => 'application/pdf',
];

return response()->download($file, 'filename.pdf', $headers);