class ActionDispatch::Head

def call(env)
  if env["REQUEST_METHOD"] == "HEAD"
    env["REQUEST_METHOD"] = "GET"
    env["rack.methodoverride.original_method"] = "HEAD"
    status, headers, body = @app.call(env)
    [status, headers, []]
  else
    @app.call(env)
  end
end

def initialize(app)
  @app = app
end