After downloading and using radiant 0.9 and globalize, I realized that I wanted to redirect the users by default with their geo location.
So I installed GeoIP and then I had to do these little modifications to the Globalize plugin.
First, I edit the file config/environment.rb and added this line, in order to load GeoIP with the application
config.gem 'geoip'
Then I updated the file vendor/extensions/globalize2/lib/globalize2/application_controller_extensions.rb
module Globalize2
module SiteControllerExtensions
def self.included(base)
base.class_eval do
alias_method_chain :find_page, :globalize
alias_method_chain :show_page, :homepage_redir
end
end
def show_page_with_homepage_redir
url = params[:url]
if Array === url
url = url.join('/')
else
url = url.to_s
end
if url == '/'
locale = params[:locale] || cookies[:locale] || session[:locale] || Globalize2Extension.ip_lookup(request.remote_ip)
redirect_to CGI.unescape('/' + locale + '/') and return
end
show_page_without_homepage_redir
end
def find_page_with_globalize(url)
globalized_url = '/' + I18n.locale + '/' + url
find_page_without_globalize(globalized_url)
end
end
end
So, as you can see on the code, I also check if the user has the language selected in a cookie, and when the user selects (or get a locale by default), I set the cookie with the locale, so the next time the user came into the site, he will see the last language selected.
Finally, I updated the file vendor/extensions/globalize2/globalize2_extension.rb and added the following method, where I get the country code from the user, and I set the locale based on his country ip, or the default locale.
def ip_lookup(ip)
g = GeoIP.new( File.join(File.dirname(__FILE__), '..', '..', 'gems', 'geoip-0.8.6', 'GeoIP.dat'))
r = g.country(ip)
country_code = r[3]
case country_code
when 'DE'
'de'
when 'GB'
'uk'
when 'AU'
'au'
when 'FR'
'fr'
when ' US'
'us'
else
'us'
end
end
And finally, we need to tell Radiant to load the GeoIP library, so in the same file, we add
extension_config do |config|
config.gem 'geoip', :source => 'http://github.com'
end
So that’s all, now you have GeoIP working with globalize and Radiant 0.9 
riginal_show_page, :show_page
alias_method :show_page, :check_homepage_redir
end
end
def check_homepage_redir
url = params[:url]
if Array === url
url = url.join('/')
else
url = url.to_s
end
if url == '/'
locale = params[:locale] || cookies[:locale] || session[:locale] || Globalize2Extension.ip_lookup(request.remote_ip)
redirect_to CGI.unescape('/' + locale + '/') and return
end
original_show_page
end
def find_page_with_globalize(url)
globalized_url = '/' + I18n.locale + '/' + url
find_page_without_globalize(globalized_url)
end
end
end
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