Rack::AdHoc

ad_hoc.rb

# Allows you to write one-off middleware directly in config.ru. Good for prototyping.
#
# Example:
#
#     use Rack::AdHoc do |app, env|
#       status, headers, body = app.call(env)
#       headers['X-Foo'] = 'bar'
#       [status, headers, body]
#     end
#
#     run MyApp
#
class Rack::AdHoc
  def initialize app, &block
    @app = app
    @block = block
  end

  def call env
    @block.call @app, env
  end
end