Help us understand the problem. What is going on with this article?

セッション情報の管理ってやつがわかってきた

セッション情報の保存方法は二通りある。

サーバーサイドに保存

  • セッション情報はセッションファイルやRedisなどに保存し、そのsession_idをブラウザのCookieに保存する
  • リクエスト時にはサーバサイドでsession_idからセッション情報を取り出す

クライアントサイドに保存

  • セッション情報(user_idを含む)はクッキー(やLocalStorage)にJWT形式で保存 (参考)
  • サーバサイドでこれをdecryptできた時点で、そこに含まれるuser_idのuserだと信用する

問題点

  • サーバサイドにおいてセッションを無効化するが術がない

参考

https://qiita.com/doyaaaaaken/items/02357c2ebca994160804

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