redirector.rb

#!/usr/bin/env ruby
# Redirect to the url in the server's clipboard
if defined? Rack then
  Redirector = Rack::Builder.new {
    use Rack::ContentLength
    app = Proc.new { |env|
      u = IO.popen('pbpaste', 'r+').read
      [303, {'Location' => u, 'Content-Type' => 'text/plain'}, ['']]
    }
    run app
  }.to_app
else
  port = ARGV.first || '3030'
  sudo = (port == '80') ? 'sudo' : ''
  cmd = '%s rackup -p %s -s thin %s' % [sudo, port, $0]
  system cmd
end