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[Rails]gem "OmniAuth" の脆弱性対策

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gem "OmniAuth" で脆弱性が指摘されていたとのこと。
https://github.com/omniauth/omniauth/pull/809

それに対応するgemが発表されているとのこと。
https://github.com/cookpad/omniauth-rails_csrf_protection

対応gemの使い方は以下。

Gemfile
gem "omniauth-rails_csrf_protection"

上記追記してbundle install。

ビューファイル
= link_to "/auth/google_oauth2", method: :post

SNS認証へのlink_toに、method: :postを追記する。
ルーティングは変更する必要ない。元がgetならgetのままでOK。
これで問題なく認証できればOK。

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