config.ru

require 'bundler/setup'
require 'sinatra/base'

# The project root directory
$root = ::File.dirname(__FILE__)

class SinatraStaticServer < Sinatra::Base  
before do
cache_control :private, :max_age => 31
unless params["cache"].nil?
    cache_control :public, :max_age => 30
    expires 30, :public
  end

  unless params["etag"].nil?
    etag Digest::MD5.hexdigest(FOUNDERS)
  end


end
  get(/.+/) do
    send_sinatra_file(request.path) {404}
  end

  not_found do
    send_sinatra_file('404.html') {"Sorry, I cannot find #{request.path}"}
  end

  def send_sinatra_file(path, &missing_file_block)
    file_path = File.join(File.dirname(__FILE__), 'public',  path)
    file_path = File.join(file_path, 'index.html') unless file_path =~ /\.[a-z]+$/i  
    File.exist?(file_path) ? send_file(file_path) : missing_file_block.call
  end

end

run SinatraStaticServer