$found['expires_at']) { http_response_code(403); echo 'Link expired'; exit; }
// 一次性链接已使用则拒绝访问
if (!empty($found['single_use']) && !empty($found['used'])) { http_response_code(403); echo 'Link already used'; exit; }
$id = $found['id'] ?? '';
if (!$id || !safeId($id)) { http_response_code(400); echo 'Bad id'; exit; }
$file = $docsDir . DIRECTORY_SEPARATOR . $id . '.html';
if (!file_exists($file)) { http_response_code(404); echo 'Not found'; exit; }
$content = file_get_contents($file);
$index = readJson($indexFile);
$title = $id;
foreach ($index as $it) { if (($it['id'] ?? '') === $id) { $title = $it['title'] ?? $id; break; } }
?>
<?= htmlspecialchars($title) ?> - 分享预览