demarches-normaliennes/config/initializers/rack_attack.rb

class Rack::Attack
  throttle('/users/sign_in/ip', limit: 5, period: 20.seconds) do |req|
    if req.path == '/users/sign_in' && req.post? && rack_attack_enabled?
      req.remote_ip
    end
  end

  throttle('stats/ip', limit: 5, period: 20.seconds) do |req|
    if req.path == '/stats' && rack_attack_enabled?
      req.remote_ip
    end
  end

  throttle('contact/ip', limit: 5, period: 20.seconds) do |req|
    if req.path == '/contact' && req.post? && rack_attack_enabled?
      req.remote_ip
    end
  end

  Rack::Attack.safelist('allow from localhost') do |req|
    IPService.ip_trusted?(req.remote_ip)
  end

  def self.rack_attack_enabled?
    ENV['RACK_ATTACK_ENABLE'] == 'true'
  end
end