gistfile1.rb

#!/usr/bin/env ruby

require 'csv'
require 'net/http'
require 'open-uri'
require 'optparse'
require 'uri'

fields = ['country_code',
          'country_name',
          'region_code',
          'region_name',
          'city_name',
          'latitude',
          'longitude',
          'metro_code',
          'area_code',
          'time_zone',
          'continent_code',
          'postal_code',
          'isp_name',
          'organization_name',
          'domain',
          'as_number',
          'netspeed',
          'user_type',
          'accuracy_radius',
          'country_confidence',
          'city_confidence',
          'region_confidence',
          'postal_confidence',
          'error']

options = { :license => "YOUR_LICENSE_KEY", :ip => "24.24.24.24" }
OptionParser.new do |opts|
  opts.banner = "Usage: omni-geoip-ws.rb [options]"

  opts.on("-l", "--license LICENSE", "MaxMind license key") do |l|
    options[:license] = l
  end

  opts.on("-i", "--ip IPADDRESS", "IP address to look up") do |i|
    options[:ip] = i
  end
end.parse!

uri = URI::HTTP.build(:scheme => 'http',
                      :host   => 'geoip.maxmind.com',
                      :path   => '/e',
                      :query => URI.encode_www_form(:l => options[:license], :i => options[:ip])
                      )

response = Net::HTTP.get_response(uri)

if ! response.is_a?(Net::HTTPSuccess)
  $stderr.puts("Request failed with status #{response.code}")
  exit(1)
end

omni = Hash[fields.zip(response.body.encode('utf-8', 'iso-8859-1').parse_csv)]

if omni["error"]
  $stderr.puts("MaxMind returned an error code for the request: #{omni["error"]}")
  exit(1)
else
  puts ""
  puts "MaxMind Omni data for #{options[:ip]}";
  puts ""
  omni.each {|key, val| printf "  %-20s  %s\n", key, val}
  puts ""
end