停止EventMachine前返回Sinatra响应

Question

我在event-machine中使用Sinatra，并希望在收到DELETE请求后关闭服务器并退出，并返回200OK。然而，现在我还不能达到这一点，并且总是在退出之前结束u返回一个空响应。我将如何实现这一点？相关代码如下：

EM.run do
  class Server < Sinatra::Base
    delete '*' do
      EM.defer proc{ halt 200 }, proc{ EM.stop }
     end
  end

  Server.run!
end

发生的情况是，我得到了一个空的回复，并得到了以下堆栈跟踪：

/Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/sinatra-1.3.3/lib/sinatra/base.rb:803:in `throw': uncaught throw `halt' in thread 0x7fa4225f2020 (ThreadError)
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/sinatra-1.3.3/lib/sinatra/base.rb:803:in `halt'
    from instant-markdown-d.rb:39:in `DELETE *'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/eventmachine-1.0.0/lib/eventmachine.rb:1037:in `call'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/eventmachine-1.0.0/lib/eventmachine.rb:1037:in `spawn_threadpool'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/eventmachine-1.0.0/lib/eventmachine.rb:1033:in `initialize'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/eventmachine-1.0.0/lib/eventmachine.rb:1033:in `new'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/eventmachine-1.0.0/lib/eventmachine.rb:1033:in `spawn_threadpool'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/eventmachine-1.0.0/lib/eventmachine.rb:1023:in `defer'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/thin-1.5.0/lib/thin/connection.rb:51:in `process'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/thin-1.5.0/lib/thin/connection.rb:39:in `receive_data'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/eventmachine-1.0.0/lib/eventmachine.rb:187:in `run_machine'
    from /Users/syeo/.rvm/gems/ruby-1.8.7-p352@instant-markdown-d/gems/eventmachine-1.0.0/lib/eventmachine.rb:187:in `run'
    from instant-markdown-d.rb:10

我也尝试了许多类似的方法，但无法找到发送200，然后关闭服务器的方法。

Answer 1

最终做了这样的事情：

EM.run do
  class Server < Sinatra::Base
    delete '*' do
      EM.add_timer(0.2) do
        EM.stop
        exit
      end
      status 200
    end
  end

  Server.run!
end

这是一种黑客行为，但至少是可行的。