serve.rb

#!/usr/bin/env ruby

require 'webrick'
include WEBrick

# add custom MIME types
#HTTPUtils::DefaultMimeTypes.store('swf', 'application/x-shockwave-flash')

port = 8081
path = File.expand_path((ARGV[0].nil?) ? File.dirname(__FILE__) : ARGV[0])

STDERR.puts "#{$0}: port #{port} serving \"#{path}\""

server = HTTPServer.new(:Port => port, :DocumentRoot => path, :DocumentRootOptions => {:FancyIndexing => true})
trap("INT"){ server.shutdown }
server.start