grab_web_data_worker.rb

    def perform(url, rules, file_name)
      response = Net::HTTP.get_response(URI.parse(url))
      doc = Hpricot(response.body)
      file = File.open(file_name, "a")
      rules.each do |rule|
        (doc/rule).each do |element|
          file.puts element.inner_html
        end
      end
      file.close
    end