List all available three-character .io domain names (depends on colorize)

threeio.rb

require 'net/http'
require 'colorize'

# find all available three-letter .io domains
alph = ('a'..'z')
# generate all three-character strings
threes = alph.map { |a| alph.map { |b| alph.map { |c| "#{a}#{b}#{c}" } } }.flatten

def io_available?(tld)
  url = URI.parse("http://www.nic.io/cgi-bin/whois?query=#{tld}.io") 
  html = Net::HTTP.get(url)
  if html =~ /Domain Available/
    return true
  else
    return false
  end
end

avail_threes = [] 

# output which are available and which are not
threes.each do |t| 
  if io_available? t
    avail_threes << t
    puts "#{t}.io".green
  else
    puts "#{t}.io".red
  end
end

# store available ones in a file
File.open('avail_threes.txt', 'w') do |f|
  avail_threes.each do |a|
    f.write("#{a}.io\n")
  end
end

This needs to be broken up into 26 smaller searches (one per letter), and some delay needs to be added, because nic.io appears to time out after enough consecutive requests.