ruby-on-rails – rails 4直播流不适用于Puma

我正在尝试使用Puma服务器在rails ActiveController :: Live上实现一个小测试.我通过rails s puma启动了Puma服务器,并使用curl localhost：3000 / messages / events进行测试.但是,在一次返回数据之前有一段很长的停顿,这与使用WEBrick相同.那么Puma服务器为什么不直播结果呢？

class MessagesController < ApplicationController
  include ActionController::Live

  def index
    @messages = Message.all
  end

  def create
    @message = Message.create!(params[:message].permit(:content,:name))
  end

  def events
    3.times do |n|
      response.stream.write "#{n}...nn"
      sleep 2
    end
  ensure
    response.stream.close
  end
end

def events
   response.headers['Content-Type'] = 'text/event-stream'
   3.times do |n|
     response.stream.write "#{n}...nn"
     sleep 2
   end
ensure
   response.stream.close
end