Checking Limits Without Incrementing? about rack-attack HOT 1 CLOSED

  def show
    if limiter.at_limit?(request)
      @warning_message = "Attempts exceeded."
      @challenge = new_captcha_form
    end
  end

  def create
    if limiter.matched_by?(request)
      validate_captcha
    end

    rest_of_the_action
  end

  def limiter
    limiter = Rack::Attack.track("requests from bucket", limit: 5, period: 3600) do |req|
      bucket
    end
  end

Rack::Attack::Configuration.class_eval do
  # nop'd because otherwise all Rack::Attack::Throttles are incremented
  # even if the gated functionality is never exercised
  def tracked?(request)
  end
end

Rack::Attack::Cache.class_eval do
  def get_count(unprefixed_key, period)
    enforce_store_presence!
    enforce_store_method_presence!(:read)

    key, expires_in = key_and_expiry(unprefixed_key, period)
    result = store.read(key)
    result || 0
  end

end

Rack::Attack::Track.class_eval do
  def at_limit?(request)
    filter.at_limit?(request)
  end
end

Rack::Attack::Throttle.class_eval do
  def at_limit?(request)
    discriminator = discriminator_for(request)
    return false unless discriminator

    current_period  = period_for(request)
    current_limit   = limit_for(request)
    count           = cache.get_count("#{name}:#{discriminator}", current_period)
    
    count > current_limit
  end
end