A simple rack middleware to debug the request pipeline

config.ru

# Usage example

require "inspect_env"
use InspectEnv
run GenericSinatraApp

inspect_env.rb

class InspectEnv
  require "yaml"

  def initialize(app)
    @app = app
  end

  def call(env)
    print_env_class = lambda do |klass|
      puts env.inspect
    end

    print_env_class.call(@app)

    @app.call(env)
  end
end