Ruby script to check existance of twitter accounts.

check_twitter_accounts.rb

#! /usr/local/bin/ruby
# coding: utf-8
#= Twitter アカウント登録済みチェック
#
# date          name            version
# 2014.12.07    mk-mode.com     1.00 新規作成
#
# Copyright(C) 2014 mk-mode.com All Rights Reserved.
#---------------------------------------------------------------------------------
# 引数 : なし
#---------------------------------------------------------------------------------
#++
require 'net/http'

class CheckTwitterAccount
  URL = "https://twitter.com/"
  ACCOUNTS = [
    "hogehoge",
    "fugafuga"
  ]

  # Main process
  def exec
    begin
      ACCOUNTS.each do |ac|
        res = url_request("#{URL}#{ac}")
        puts res ? "  * #{ac}" : "  - #{ac}"
      end
    rescue => e
      STDERR.puts "[#{e.class}] #{e.message}"
      e.backtrace.each{|trace| STDERR.puts "\t#{trace}"}
      exit 1
    end
  end

private

  # Check URL request recursively
  #   @param  url[String]
  #   @param  limit[Integer]
  #   @return [Boolean]
  def url_request(url, limit = 5)
    return false if limit == 0

    begin
      res = Net::HTTP.get_response(URI.parse(url))
    rescue
      return false
    else
      case res
      when Net::HTTPSuccess
        return true
      when Net::HTTPRedirection
        url_request(res['location'], limit - 1)
      else
        return false
      end
    end
  end
end

CheckTwitterAccount.new.exec