cookies - google CheckCookie 链接有什么作用？

Question

我找到了一个代码，它在以编程方式登录谷歌帐户后打开此链接。
这个链接的目的是什么？

https://www.google.com/accounts/CheckCookie?chtml=LoginDoneHtml

Answer 1

After Successfully logged in this url gets all old cookiees which stored in browser in request header and verify with server and update it if any changes.

generally this cookie always changed during each request 

 1. __utma,
 2. __utmb,
 3. __utmc,
 4. __utmz.

要查看更改 cookie 的实时演示，请在 Firefox 中使用 firecookie 插件。