难道是因为 express 中间件里变量作用域的问题，导致这段代码中的 cookieStore 实际上是共享的？代码如下：

app.get('*', (req, res) => {
  const tryCookie = req.headers.cookie;
  if (typeof tryCookie === 'string') {
    console.log('Middleware: we got cookies', tryCookie);
    const cookieStore: {
      [key: string]: string
    } = {};
    const cookiesArr = tryCookie.split(';');
    for (const cookie of cookiesArr) {
      const cookieArr = cookie.split('=');
      cookieStore[cookieArr[0].trim()] = cookieArr[1].trim();
    }
    const token = cookieStore['eliseos:token'] || null;
    // ...
  }
  // ...
}

怎么有一种我这么久 express 白写了的感觉……