Checks if a domain exists in all top-level domains

whois.rb

# blog post: http://blog.slashpoundbang.com/post/2346603512/checking-if-a-domain-exists-in-all-top-level-domains

name = "domain" # CHANGE THIS

require 'whois'

# deleted, unimplemented, or not in use: bv cs dd eh er gb sj ss yu
tlds = %w(aero asia biz cat com coop info int jobs mobi museum name net org post pro tel travel xxx) + # generic
%w(edu gov mil) + # USA
%w(arpa) + # infrastructure
%w(ac ad ae af ag ai al am an ao aq ar as at au aw ax az ba bb bd be bf bg bh bi bj bm bn bo br bs bt bw by bz ca cc cd cf cg ch ci ck cl cm cn co cr cu cv cx cy cz de dj dk dm do dz ec ee eg es et eu fi fj fk fm fo fr ga gd ge gf gg gh gi gl gm gn gp gq gr gs gt gu gw gy hk hm hn hr ht hu id ie il im in io iq ir is it je jm jo jp ke kg kh ki km kn kp kr kw ky kz la lb lc li lk lr ls lt lu lv ly ma mc md me mg mh mk ml mm mn mo mp mq mr ms mt mu mv mw mx my mz na nc ne nf ng ni nl no np nr nu nz om pa pe pf pg ph pk pl pm pn pr ps pt pw py qa re ro rs ru rw sa sb sc sd se sg sh si sk sl sm sn so sr st su sv sx sy sz tc td tf tg th tj tk tl tm tn to tp tr tt tv tw tz ua ug uk us uy uz va vc ve vg vi vn vu wf ws ye yt za zm zw)

errors = {
  "This `tld' has no whois server"                                         => [],
  "execution expired"                                                      => [],
  "Connection reset by peer"                                               => [],
  "Connection refused - connect(2)"                                        => [],
  "getaddrinfo: nodename nor servname provided, or not known"              => [],
  "This TLD has no whois server, but you can access the whois database at" => {},
  "UNKNOWN"                                                                => {},
}
exists = tlds.select do |tld|
  begin
    response = Whois.whois("#{name}.#{tld}")
  rescue => e
    if errors[e.to_s]
      errors[e.to_s] << tld
    elsif e.to_s[/This TLD has no whois server, but you can access the whois database at `(.+)'/, 1]
      errors["This TLD has no whois server, but you can access the whois database at"][tld] = $1
    else
      errors["unknown"][tld] = e.to_s
    end
  end
  response && response.registered?
end