Use hostapi.info to get the public IP of a system

ipinfo.rb

require "httparty"

class IPinfo
  include HTTParty
  base_uri('api.hostip.info')
  format :xml
  
  def self.public()
    response = get('/').parsed_response
    response["HostipLookupResultSet"]["featureMember"]["Hostip"]["ip"]
  end
end
      
# get current ip
puts IPinfo.public