handle_options

# File actionpack/lib/action_dispatch/middleware/cookies.rb, line 283
      def handle_options(options) #:nodoc:
        options[:path] ||= "/"

        if options[:domain] == :all
          # if there is a provided tld length then we use it otherwise default domain regexp
          domain_regexp = options[:tld_length] ? /([^.]+\.?){#{options[:tld_length]}}$/ : DOMAIN_REGEXP

          # if host is not ip and matches domain regexp
          # (ip confirms to domain regexp so we explicitly check for ip)
          options[:domain] = if (@host !~ /^[\d.]+$/) && (@host =~ domain_regexp)
            ".#{$&}"
          end
        elsif options[:domain].is_a? Array
          # if host matches one of the supplied domains without a dot in front of it
          options[:domain] = options[:domain].find {|domain| @host.include? domain.sub(/^\./, '') }
        end
      end