hello dear LINUX experts


run opensuse with version 13.1

where do i get the following ruby modules / ingedients to run this programme....
Code:
require 'open-uri'
require "net/http"
require 'rexml/document'

def query_overpass(object_type, left,bottom,right,top, key, value)
   base_url = "http://www.overpass-api.de/api/xapi?"
   query_string = "#{object_type}[bbox=#{left},#{bottom},#{right},#{top}][#{key}=#{value}]"
   url = "#{base_url}#{URI.encode(query_string)}"
   resp = Net::HTTP.get_response(URI.parse(url))
   data = resp.body
   return data and so on and so forth
do i find them in a repo or should i install it with / trough the software-installation-programme...

love to hear from you