atmoinfo.rb

#!/usr/bin/env ruby

require 'net/http'

$this_version = '2011.01.04.001'
$resource_url = 'http://169.254.169.254/latest/meta-data/'
$instance_info_hash = Hash.new


def vmInfo()
  def a(address)
          url = URI.parse(address)
          req = Net::HTTP::Get.new(url.path)
          res = Net::HTTP.start(url.host, url.port) { |http| http.request(req) }
          res.body.split().map { |i| lambda{ if i[-1,1] != "/" then $instance_info_hash[(address+i)[40..-1]] = "" else lambda{a(address+i)}.call end}.call}
  end
  def set()
          a($resource_url)
    $instance_info_hash.each_pair{ |key,value|
      url = URI.parse($resource_url+key)
      req = Net::HTTP::Get.new(url.path)
      res = Net::HTTP.start(url.host, url.port) {|http| http.request(req) }
      if res.class == Net::HTTPInternalServerError then $instance_info_hash[key] = nil
                  else $instance_info_hash[key] = res.body end
    }
  end
end

def main()
  vmInfo.set();
  $instance_info_hash.each_pair{ |key,value| puts "#{key} : #{value}" }
  puts ""
  puts "Atmo Info"
  puts "Version #{$this_version}"
  puts "Author: Seung-jin Kim <[email protected]>"
end


main()