github-namechecker.rb

#!/usr/bin/env ruby
# encoding: utf-8

require 'net/http'

def available?(username)
  uri = URI('https://github.com/signup_check/username')
  res = Net::HTTP.post_form(uri, :value => username)

  puts res.body

  return false if res.body == 'Username is already taken'
  return false if res.body == 'Username is a reserved word'
  return false if res.body == 'Username is a reserved word and is already taken'

  return true
end

def three
  chars = 'abcdefghijklmnopqrstuvwxyz'.split('')
  for i in 0..25
    for j in 0..25
      for k in 0..25
        username = "#{chars[i]}#{chars[j]}#{chars[k]}"
        puts username if available?(username)
      end
    end
  end
end

three()