handle_options method from action_dispatch

handle_option.rb

def handle_options(options) #:nodoc:
  options[:path] ||= "/"

  if options[:domain] == :all || options[:domain] == "all"
    domain_regexp = options[:tld_length] ? /([^.]+\.?){#{options[:tld_length]}}$/ : DOMAIN_REGEXP
    options[:domain] = if (request.host !~ /^[\d.]+$/) && (request.host =~ domain_regexp)
      ".#{$&}"
    end
  elsif options[:domain].is_a? Array
    options[:domain] = options[:domain].find { |domain| request.host.include? domain.sub(/^\./, "") }
  end
end