<?php
header('Content-Type: application/json');
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    echo json_encode(['ok' => false, 'error' => 'POST only']);
    exit;
}
$file = basename($_POST['file'] ?? '');
if (!$file || !preg_match('/^[a-zA-Z0-9_\-]+\.lock$/', $file)) {
    echo json_encode(['ok' => false, 'error' => 'Invalid filename']);
    exit;
}
$path = '/tmp/unraid_locks/' . $file;
if (file_exists($path)) @unlink($path);
echo json_encode(['ok' => true]);