cloudstack api rest response

cs_vmsnapshot_count.rb

#!/usr/bin/env ruby
require 'net/http'
require 'openssl'
require 'base64'
require 'cgi'
require 'yaml'
require 'json'
require 'time'

begin
  vmsnap_cnt = 0
  config = YAML.load(File.read(".cloudstack/config.yml"))
  command_param = "apikey=#{config['APIKEY']}&command=listVMSnapshot&listall=true&response=json"
  urlenc_command_param =  URI.escape(command_param)
  data = urlenc_command_param.downcase
  base64_sig = Base64.encode64(OpenSSL::HMAC.digest( OpenSSL::Digest.new('sha1'), config['SECKEY'], data)).strip
  enc_sig = CGI.escape(base64_sig)
  access_uri = URI.parse("#{config['URL']}/client/api?#{command_param}&apikey=#{config['APIKEY']}&signature=#{enc_sig}")
  http = Net::HTTP.new(access_uri.host, access_uri.port)
  res = http.get(access_uri)
  json_res = JSON.parse(res.body)
  results = json_res['listvmsnapshotresponse']['vmSnapshot']
  results.each do |result|
    if Time.parse(result['created']) < Time.now - 24*60*60
#      puts result['id']
      vmsnap_cnt += 1
    end
  end
  puts vmsnap_cnt
rescue => e
  puts "Error: exception: #{e}"
end