Sample Rack App with Haml Templates

haml_rack.rb

class HelloApp
  def self.call(env)
    require 'haml'
    @name = "Test"
    template = File.read(File.join("views", "index.haml"))
    haml_engine = Haml::Engine.new(template)
    output = haml_engine.render(binding)
    [200, {'Content-Type' => 'text/html'}, [output]]
  end
end

old but gold