Rack::Geoip

A rack middleware component that handles simple geoip lookups.

Installation

First you must have a GeoIP database installed. Currently the only backend support is the free one from MaxMind (www.maxmind.com). So you must first install the C api bindings.

$ wget http://geolite.maxmind.com/download/geoip/api/c/GeoIP.tar.gz
$ tar xzf GeoIP.tar.gz
$ cd GeoIP-1.4.6
$ ./configure && make && sudo make install

To download the actual GeoLiteCity (free) database you can currently find it here (I like to place it in a data sub-directory).

$ cd data
$ wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
$ gunzip GeoLiteCity.dat.gz

And finally install the gem

$ gem install rack-geoip

Usage

Basic Usage

require 'rack/geoip'
use Rack::Geoip
run app

Using with Rails

Add this to your config/environment.rb

config.gem 'rack-geoip'

And then in an initializer block

config.middleware.use "Rack::Geoip",
  :db => 'data/GeoLiteCity.dat',
  :path => '/geoip/info',
  :db_lookup => :memory

Sample output

$ curl http://localhost:9292/lookup?ip=8.8.8.8

{ "area_code":650,
  "city":"Mountain View",
  "postal_code":"94043",
  "country_code":"US",
  "latitude":37.4192008972168,
  "country_code3":"USA",
  "longitude":-122.057403564453,
  "country_name":"United States",
  "dma_code":807,
  "region":"CA" }

Note on Patches/Pull Requests

Fork the project.
Make your feature addition or bug fix.
Add tests for it. This is important so I don’t break it in a future version unintentionally.
Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
Send me a pull request. Bonus points for topic branches.

Credits

I want to acknowledge the work done by Geoffrey Grosenbach (peepcode.com) on the sinatra-geoip gem which was the inspiration for this.