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【Rails】CloudFrontの署名付きURLの作成方法

Last updated at Posted at 2020-12-14

準備

Gemの「AWS - SDK」を使用する。
※ CarrierWaveを使用している前提

gem "aws-sdk"

実装

KEY_PAIR_ID:CloudFrontで作成したキーペアのID
PRIVATE_KEY:CloudFrontで作成したキーペアのプライベートキーの内容
※ private_key_pathオプションを使用すれば、プライベートキーのファイルパスを指定すれば読み込んでくれる。
公式リファレンス

class ApplicationUploader < CarrierWave::Uploader::Base
  def signed_url
    if path.blank?
      url
    else
      signer = Aws::CloudFront::UrlSigner.new(key_pair_id: KEY_PAIR_ID, private_key: PRIVATE_KEY)
      signer.signed_url(url, expires: Time.zone.now + 5.minutes)
    end
  end
end

関連

【AWS】CloudFrontで署名付きURLの設定方法(プライベートコンテンツの配信)

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