Start Webrick in current directory, port 9090 - added option for bonjour annoucement so it works via back to my mac!

WEBrickNow.rb

#!/usr/bin/env ruby
require 'webrick'
require 'optparse'
include WEBrick
options = {:Port => 9090, 
          :DocumentRoot => './',
          :Bonjour => false}
 
optparser=OptionParser.new do |opts|
    opts.banner = "Usage: #{File.basename(__FILE__)} [options]"
    opts.on("-p", "--port port_num", "Specify Port Number") do |v|
        options[:Port]=v
    end
    opts.on("-d", "--docroot path", "Specify Document Root Folder") do |v|
        options[:DocumentRoot]=v
    end
    opts.on("-b", "--bonjour", "Announce via Bonjour") do |v|
        options[:Bonjour]=v
    end
end

def registration_domains 
    dns_output = IO.popen('dns-sd -E') {|dns| sleep 0.5; lines_read = dns.read_nonblock(10000); %x{kill #{dns.pid}}; lines_read}
    domains = []
    domain_parts = nil
    dns_output.split("\n").each { |line|
        last_text = line.scan(/\S+$/)[0]
        unless (line =~ /Added/).nil? then
            domains.push(domain_parts.reverse.join('.')) unless domain_parts.nil?
            domain_parts = []
        end
        unless domain_parts.nil? then
            domain_parts.push(last_text)
        end
    }
    domains.push(domain_parts.reverse.join('.')) unless domain_parts.nil?
    return domains
end

def register_http_bonjour_service(name, port, domains = nil)
    device_name = %x|hostname|.split('.')[0]
    domains = registration_domains if domains.nil?
    domains.each {|domain|
        task_string = "dns-sd -R 'WEBRickNow - #{device_name} - #{domain}' _http._tcp. #{domain} #{port}"
        puts task_string + "\n"
        IO.popen(task_string)
    }
end
 
def start_webrick(config = {})
  server = HTTPServer.new(config)
  yield server if block_given?
  ['INT', 'TERM'].each {|signal|
    trap(signal) {server.shutdown}
  }
  server.start
end

begin
  optparser.parse!(ARGV)
  if (options[:Bonjour]) then
    register_http_bonjour_service("WEBRickNow",options[:Port])
  end
  start_webrick(options)
rescue Exception=>e
  puts optparser.to_s
end