Cross check IP addresses

cross_check_ips.rb

require 'pathname'
require 'whois'
require 'resolv'

# for file in *.log; do cat $file | grep -vi '+http://yandex.com/bots' | grep -vi 'googlebot' > $file.woutbots; done
# for file in *.woutbots; do cat $file | cut -f1 -d' ' > $file.ips; done
# for file in *.ips; do cat $file | sort | uniq > $file.uniq; done

a_folder = ARGV[0] unless ARGV.empty?
b_folder = ARGV[1] unless ARGV.empty? && ARGV.length != 1

class CrossChecker

  FILE_EXT = "*.ips.uniq"

  def initialize(a_folder, b_folder)

    @@B_IPS = []
    @@A_IPS = []

    @@LOG_FILE = "cross.log"
    @@logger = nil
    @@workdir = nil

    # get CWD
    @@workdir = Dir.pwd


    # prepare ips for checking
    Dir.chdir File.join @@workdir, b_folder
    Dir.glob(FILE_EXT).each do |b_file|
      File.open(b_file) do |file|
        file.each do |ip|
          @@B_IPS << ip
        end
      end
    end

    #prepare ips to check
    Dir.chdir File.join @@workdir, a_folder
    Dir.glob(FILE_EXT).each do |a_file|
      File.open(a_file) do |file|
        file.each do |ip|
          @@A_IPS << ip
        end
      end
    end

    # open log file
    @@logger = File.new File.join(@@workdir, @@LOG_FILE), "w+"
  end

  def check
    @@A_IPS.each do |a_ip|
      if @@B_IPS.find_index a_ip 
        begin
          name = Resolv.getname(a_ip.chop)
        rescue
          name = "----"
        end
        @@logger.write "%-20s \t\t %s\n" % [a_ip.chop, name]
        puts "Match found for #{a_ip}"
      end
    end

    @@logger.close
  end

end

CrossChecker.new(a_folder, b_folder).check