app.rb

require 'sinatra/base'
class ApplicationController < Sinatra::Base
  def self.inherited sublass
    super
    Router.use(sublass)
  end

  def self.validated_get(route, &block)
    get(route) do
      block.call
    end
  end
end

class FooController < ApplicationController

  def print_request
    puts request
  end

  validated_get('/foo') do
    print_request
    "hi\n"
  end
end

config.ru

require 'json'
require './app'
require 'sinatra/base'

CONTROLLERS_PATH='./'

Router = Sinatra.new

class Sinatra::Request
  def json
    @json ||= (JSON.parse(self.body.read) rescue nil)
    @json
  end
end


#require "#{CONTROLLERS_PATH}/application_controller"
#Dir.glob('./lib/kuadro/models/*.rb').each { |file| require file}
#Dir.glob('./lib/kuadro/controllers/*.rb').each { |file| require file}

Router.run!