在同一个脚本中启动并调用Ruby HTTP服务器 [英] Start and call Ruby HTTP server in the same script

问题描述

我想知道如何启动Ruby Rack应用程序（如Sinatra），并在同一脚本中使用Net :: HTTP或类似的名称。我可以做一些类似...

  require'sinatra / base'
 require'net / http' 
 
t = Thread.new do 
 class App< Sinatra :: Base 
 get'/'do 
'嗨！'
 end 
 end 
 
 App.run！ ：host => 'localhost'，：port => 1234 
 end 
 
 sleep 2 
 
放置Net :: HTTP.start（'localhost'，1234）{| http | $。$（$ / $）$。 $ p> 
 
 
 ...但是睡眠两秒钟并不理想，等待Thin启动。我需要的是某些回调服务器启动或有人有其他建议吗？
解决方案
   run！在目前的Sinatra版本使用一个在应用程序启动时调用的块。
 
 
 
使用该回调，您可以执行以下操作：
  require'thread'
 
 def sinatra_run_wait（app，opts）
 queue = Queue.new 
 thread = Thread.new do 
 Thread.abort_on_exception = true 
 app.run！（opts）do | server | 
 queue.push（started）
 end 
 end 
 queue.pop＃blocks直到运行！回调运行
 end 
 
 sinatra_run_wait（TestApp，：port => 3000，：server =>'webrick'）
  
这对WEBrick来说似乎是可靠的，但是当使用Thin时，在服务器接受连接之前，有时还会调用回调。
 
I wonder how I could start a Ruby Rack application (such as Sinatra) and call it with Net::HTTP or similar in the same script. Of couse I could do something like...
require 'sinatra/base'
require 'net/http'

t = Thread.new do
    class App < Sinatra::Base
        get '/' do
            'Hi!'
        end
    end

    App.run! :host => 'localhost', :port => 1234
end

sleep 2

puts Net::HTTP.start('localhost', 1234) { |http| http.get('/') }.body

t.join

puts 'Bye!'
...but it doesn't feel optimal to sleep for two seconds, waiting for Thin to start. What I need is some kind of callback when the server has started or does anybody have any other suggestions?
解决方案
run! in current Sinatra versions takes a block that is called when the app is started.

Using that callback you can do this:
require 'thread'

def sinatra_run_wait(app, opts)
  queue = Queue.new
  thread = Thread.new do
    Thread.abort_on_exception = true
    app.run!(opts) do |server|
      queue.push("started")
    end
  end
  queue.pop # blocks until the run! callback runs
end

sinatra_run_wait(TestApp, :port => 3000, :server => 'webrick')
This seems to be reliable for WEBrick, but when using Thin the callback is still sometimes called a little bit before the server accepts connections.

                        
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