同样的代码，跑在 thin 上面死活报“ << not opend for writing" 偶尔试了下 puma，能够正确执行

大概代码：

require 'sinatra/base' require 'sinatra/streaming'

class Test < Sinatra::Base helpers Sinatra::Streaming

get '/' do stream :keep_open do |out| out << 'request stream" 11.tiems { |i| out << Time.now| end end end