anon_access_denied_bad.rb

def anon_access_denied
  respond_to do |accepts|
    accepts.html do
      store_location
      redirect_to login_path
    end
    accepts.xml do
      headers["Status"]           = "Unauthorized"
      headers["WWW-Authenticate"] = %(Basic realm="Web Password")
      render :text => "Could't authenticate you", :status => '401 Unauthorized'
    end
    accepts.js do 
      render(:update) { |page| page.redirect_to login_path }
    end
  end
end

anon_access_denied_good.rb

def anon_access_denied
  respond_to do |accepts|
    accepts.html do
      store_location
      redirect_to login_path
    end
    accepts.xml do
      headers["Status"]           = "Unauthorized"
      headers["WWW-Authenticate"] = %(Basic realm="Web Password")
      render :text => "Could't authenticate you", :status => '401 Unauthorized'
    end
    accepts.js do 
      render(:update) { |page| page.redirect_to login_path }
    end
    accepts.any do 
      store_location
      redirect_to login_path
    end
  end
end