<?php
$file_names = ['win' => 'rustdesk.bat', 'deb' => 'rustdesk.sh', 'arch' => 'rustdesk.sh'];
$scripts = ['win' => 'scripts/rustdesk.bat', 'deb' => 'scripts/rustdesk-deb.sh', 'arch' => 'scripts/rustdesk-arch.sh'];

header("Content-Type: application/octet-stream");
header('Content-Disposition: attachment; filename="' . $file_names[$_GET['os']] . '"');
header('Content-Length: ' . filesize($scripts[$_GET['os']]));

readfile($scripts[$_GET['os']]);
exit;