Dynamic cookie domain (for multitenant app)

rubyonrails-talk
1

There is a Multitenant App, that should serve sites on domains like this:   client1.app.com   client2.app.com And it's easy to share cookies between all of them (using '.app.com' cookie domain):   ActionController::Base.session = {:key => thekey, :secret => thesecret, :domain => '.app.com'}

But! There is one more requirement, those sites should be also avaliable as:   www.client1.com

So, in order to all this works the App should dynamically change the cookie domain:   xxx.app.com => ".app.com"   www.xxx.com => ".xxx.com" or leave it blank

Google told me that there is one approach http://codetunes.com/2009/04/17/dynamic-cookie-domains-with-racks-middleware/ but it doesn't works (Rails 2.3.5).

I also tried my own solution:

  class CrossDomainCookies     def initialize(app)       @app = app     end

    def call(env)       host = env["HTTP_HOST"].split(':').first.downcase       if host.include?('.')         normalized_host = host.scan(/[^\.]+\.[^\.]+$/).first         cookie_domain = ".#{normalized_host}"       else         normalized_host = host         cookie_domain = host       end

      Rails.logger.info cookie_domain

      ActionController::Base.session_options['domain'] = cookie_domain

      @app.call(env)     end   end

But it also doesn't works, maybe there are some other solutions?