Rails - Aug 2009 - Dynamic session domain using Rack

Rails: 2.3.3

Overview: I want to enable cross domain session support. Eventually,
I''ll have several domains for users to choose from, i.e.
user.domain1.com or user.domain2.com. I''ve borrowed from the code
below,
but it doesn''t seem to be working.


In middleware:

class SetCookieDomain

  def initialize(app, default_domain)
    @app = app
    @default_domain = default_domain
  end

  def call(env)
    host = env["HTTP_HOST"].split('':'').first
    env["rack.session.options"][:domain] = custom_domain?(host) ?
".#{host}" : "#{@default_domain}"
    @app.call(env)
  end

  def custom_domain?(host)
    domain = @default_domain.sub(/^\./, '''')
    host !~ Regexp.new("#{domain}$", Regexp::IGNORECASE)
  end
end

In environment.rb:

config.load_paths += %W(#{RAILS_ROOT}/app/middlewares)


In development.rb:

config.middleware.use "SetCookieDomain", ".mydomain.com"
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