Untitled

## merb/filter.rb

def force_cas_check
  @client ||= CASClient::Client.new(config)

  service_ticket = read_ticket(self)

  cas_login_url = client.add_service_to_login_url(read_service_url(self))

  if service_ticket

    client.validate_service_ticket(service_ticket) unless service_ticket.has_been_validated?

    validation_response = service_ticket.response

    if service_ticket.is_valid?

      session[client.username_session_key] = validation_response.user
      session[client.extra_attributes_session_key] = validation_response.extra_attributes

      session[:cas_last_valid_ticket] = service_ticket
      return true
    else
      redirect cas_login_url
      return false
    end
  else
    log.warn("No ticket -- redirecting to #{cas_login_url}")
    redirect cas_login_url
    return false
  end
end

## One of my controllers.rb

include CASClient::Frameworks::Merb::Filter
before :force_cas_check, :only => ["index"]

def index
  render
end