Get MacAddress - IPAddress table for PR-400NE

main.rb

#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

require 'nokogiri'
require 'net/http'
require 'net/https'

hostname_tbl = {}
hostname_tbl["01:23:45:67:89:Ab"]="hoge.local"


def xpath_class(classname)
  return "contains(concat(\" \",normalize-space(@class),\" \"), \" #{classname} \")"
end

req = Net::HTTP::Get.new("/index.cgi/info_dhcpv4server")
req.basic_auth "user", "pass"
http = Net::HTTP.start("192.168.1.1")
res = http.request(req)

if res.code == "200"
  html = Nokogiri::HTML(res.body)  
  http.finish

  # trs = html.xpath("//table[.//label[text()=\"アサインテーブル\"]]//tr[position()>2]")
  trs = html.xpath("//table[.//label[text()=\"アサインテーブル\"]]//tr[./td[#{xpath_class("matrix_item")}]]")

  trs.each do |tr|
    # puts "%s\t%s" % [tr.xpath("./td[1]").text, tr.xpath("./td[2]").text]

    ipaddress_td = tr.xpath("./td[1]").text
    ipaddress_md = ipaddress_td.match(/(\d+[.]\d+[.]\d+[.]\d+)/)

    ipaddress = ipaddress_md[1]
    
    macaddress_td = tr.xpath("./td[2]").text
    macaddress_md = macaddress_td.match(/(\w\w:\w\w:\w\w:\w\w:\w\w:\w\w)/)

    macaddress = macaddress_md[1]
    
    # printf "%s %s\n", ipaddress_md[1], macaddress_md[1]
    if hn = hostname_tbl[macaddress]
      printf "%s %s\n", ipaddress, hn
    end
                         
  end

else
  http.finish
end