.gitignore

.DS_Store

bm.rb

class BM

  def initialize(app)
    @app = app
  end

  def call(env)
    start = Time.now
    res = @app.call(env)
    el = Time.now - start
    p [:el, el]

    res
  end

end

config.ru

require 'web'
require 'bm'

use BM

run Web

index.erb

<table>
  <% env.each do |k, v| %>
    <tr><td><%= k %></td><td><%= v %></td></tr>
  <% end %>
</table>

web.rb

require 'rubygems'
require 'sinatra/base'

class Web < Sinatra::Base

  use Rack::Auth::Basic do |user, pass|
    ["foo", "bar"] == [user, pass]
  end

  get '/' do
    erb :index
  end

  get '/:key' do |key|
    env[key] || "not found"
  end

end