Read IP addresses from STDIN geocode IPs and print 2-tuple (long, lat) to STDOUT

geocode-ips.rb

#!/usr/bin/env ruby -W0
require 'geoip'

geocity_file_location = ARGV[0] || "./GeoLiteCity.dat"
geocoder = GeoIP.new(geocity_file_location)

i = 0
STDIN.each do |ip|
  STDERR.write("Processing Line: #{i}\n") if i % 1000 == 0
  i += 1
  result = geocoder.city(ip.strip)
  next unless result
  puts "#{result.longitude},#{result.latitude}"
end