Start a simple HTTP server to serve current directory.

serveme

#!/usr/bin/ruby -w

require 'rubygems'
require 'optparse'
require 'rack'

# setup options
options = { :Port => 4000, :Host => "0.0.0.0" }
opt_parser = OptionParser.new do |opts|
  opts.banner = "Usage: serveme [-p PORT] [-h HOST] [-s thin|webrick|...]"

  opts.separator ""

  opts.on("-p", "--port PORT", "run on port (default: 4000)") { |p| options[:Port] = p.to_i }
  opts.on("-h", "--host HOST", "listen on host (default: 0.0.0.0)") { |h| options[:Host] = h }
  opts.on("-s", "--server SERVER", "use server (thin, webrick, mongrel..)") { |s| options[:server] = s }

  opts.on_tail("-?", "--help", "Show this message") { puts opts; exit }
end

# parse options
begin
  opt_parser.parse! ARGV
rescue OptionParser::InvalidOption => e
  warn e.message
  abort opt_parser.to_s
end

# start rack server
options[:app] = Rack::Directory.new Dir.pwd
srv = Rack::Server.new(options).start

Installation:

1. curl https://raw.github.com/gist/1154170/6aeb61dfac060fe1ad7aaca9640c3051029ed571/serveme > /usr/local/bin/serveme
2. chmod +x /usr/local/bin/serveme
3. change into directory to serve via http
4. serveme

Type serveme --help for help