require 'xmlrpc/client'


def lookup_upc(upc, rpc_key)
  server = XMLRPC::Client.new2('http://www.upcdatabase.com/xmlrpc')
  begin
    response = server.call('lookup', :upc => upc, :rpc_key => rpc_key)
    return response['found'] ? response : nil
  rescue XMLRPC::FaultException => e
    puts "Error: "
    puts e.faultCode
    puts e.faultString
  end
end


['018787765654', 'no such UPC'].each do |upc|
  product = lookup_upc(upc, ARGV.first.strip)
  if product
    puts product['description']
    puts product['size']
  else
    puts "Oh no! product with upc='#{upc}' is #{product.inspect}"
  end
end