Sinatra 随机启动演示服务器

Question

我正在编写一个小的代理检查实用程序，这是我目前的代码：

require "thread"
require "socket"
require "http"
require "sinatra"

host = "0.0.0.0"
port = 6660

Thread.new do
  class App < Sinatra::Base
    set :server, :thin

    get '/' do
      env.select {|k,v| k.start_with? 'HTTP_'}.collect {|pair| "#{pair[0].sub(/^HTTP_/, '')}: #{pair[1]}"}.join "\n"
    end
  end

  App.run! host: host, port: port
end

sleep 2

queue = Queue.new

ext_ip = Socket.ip_address_list.detect{|intf| intf.ipv4?}.ip_address # and !intf.ipv4_loopback? and !intf.ipv4_multicast? and !intf.ipv4_private?}
url = "http://#{url}:#{port}/"

Thread.new do
  queue << proxy.split(":") while proxy = gets.chomp
end

servers = [1, 2, 3, 4, 5].map {
  Thread.new do
    until queue.empty?
      p "shit", queue.pop
      headers = HTTP.via(*queue.pop).get(url).split("\n").map {|l| l.split(" ", 2)}.to_h
      p headers
    end
  end
}.each do |t|
  t.join
end

出于某种原因，这不仅会在 localhost:6660 上启动一个 sinatra 服务器，还会在 localhost:4567 上启动一个 sinatra 服务器，我完全不明白为什么。

这是我得到的输出：

== Sinatra (v1.4.6) has taken the stage on 6660 for development with backup from Thin
Thin web server (v1.6.3 codename Protein Powder)
Maximum connections set to 1024
Listening on localhost:6660, CTRL+C to stop
Stopping ...
== Sinatra has ended his set (crowd applauds)
== Sinatra (v1.4.6) has taken the stage on 4567 for development with backup from Thin
Thin web server (v1.6.3 codename Protein Powder)
Maximum connections set to 1024
Listening on localhost:4567, CTRL+C to stop

第二台服务器来自哪里？？当我在浏览器中打开它时，它是默认的 Sinatra 启动画面。

Answer 1

而不是 require "sinatra"，使用 require "sinatra/base". Requiring just sinatra enables the built in server, which will start serving the (empty) Sinatra::Application app in an at_exit handler。

Sinatra 随机启动演示服务器

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