https://qooah.com/2012/04/21/facebook-app-%e6%9c%89%e6%9b%b4%e6%96%b0%ef%bc%8c%e8%bc%89%e5%85%a5%e9%80%9f%e5%ba%a6%e6%9b%b4%e7%88%bd%ef%bc%8c%e6%96%b0%e5%a2%9e%e5%85%a9%e7%8d%a8%e7%ab%8b-apps/