Scrape stackshare.io to get a list of host

scrape.rb

require 'http'
require 'nokogiri'

File.open('urls.txt', 'r') do |file_handle|
  file_handle.each_line do |line|
    begin
      html = HTTP.get(line).to_s
      doc = Nokogiri::HTML(html)
      href = doc.xpath('//*[@id="stp-sidebar"]/div/div[1]/div[1]/a/@href')
      if href.to_s == ''
        File.open('bad.txt', 'a+') {|f| f.puts(line) }
      else
        host = URI(HTTP.get('http://stackshare.io/' + href.to_s)['Location']).host
        if host != ''
          File.open('good.txt', 'a+') {|f| f.puts(host) }
        else
          File.open('bad.txt', 'a+') {|f| f.puts(line) }
        end
      end
    rescue
      puts 'could not parse:'+line
    end
  end
end