Function probe

docs/scripts/gen-paicoding-canonical.mjs:36–52

(slug)

}

async function probe(slug) {
  const ctrl = new AbortController();
  const t = setTimeout(() => ctrl.abort(), TIMEOUT_MS);
  try {
    const res = await fetch(`${HOST}/${slug}`, { signal: ctrl.signal, redirect: "follow" });
    if (!res.ok) return false;
    const html = await res.text();
    const m = html.match(/<title>([\s\S]*?)<\/title>/i);
    const title = m ? m[1].trim() : "";
    // 标题恰好等于首页标题（或为空）说明该 slug 不存在，paicoding 用首页兜底
    return title !== "" && title !== HOME_TITLE;
  } catch {
    return null; // 网络异常：返回 null，调用方据此保留旧清单中的该项
  } finally {
    clearTimeout(t);
  }
}

async function pool(items, worker, size) {
  const results = new Array(items.length);