require 'rest-client' class NvdDownloader attr_accessor :base_url, :years MIN_YEAR = '2002' MAX_YEAR = '2019' AVAILABLE_YEARS = (MIN_YEAR..MAX_YEAR).to_a def initialize @base_url = "https://nvd.nist.gov/feeds/json/cve/1.0/" @years = self.years end def years year = NvdDownloader::AVAILABLE_YEARS.map do |year| [year.to_i, year] end.to_h end def year(year) years[year] end def get(url) end end