RailsでBASIC認証機能を追加する (heroku向け)

application_controller.rb に以下を入れれば一発

application_controller.rb

class ApplicationController

  before_filter :basic_auth_filter

  private

    def basic_auth_filter
      return true if ENV['ENABLE_BASIC_AUTH'].to_i != 1

      authenticate_or_request_with_http_basic do |username, password|
        username == ENV['BASIC_AUTH_ID'] &&
        password == ENV['BASIC_AUTH_PASS']
      end
    end
end

で以下で設定

heroku config:set **** -a [YOUR-HEAOKU-APP]