制作多个HTTP请求异步 [英] Making multiple HTTP requests asynchronously

问题描述

require 'net/http'

urls = [
  {'link' => 'http://www.google.com/'},
  {'link' => 'http://www.yandex.ru/'},
  {'link' => 'http://www.baidu.com/'}
]

urls.each do |u|
  u['content'] = Net::HTTP.get( URI.parse(u['link']) )
end

print urls

这code工作在同步风格。第一个要求，第二，第三。我想异步发送的所有请求，并打印网​​址后，所有的人就完成了。

This code works in synchronous style. First request, second, third. I would like to send all requests asynchronously and print urls after all of them is done.

什么是最好的方式做到这一点？光纤是适合的？

What the best way to do it? Is Fiber suited for that?

推荐答案

下面是使用线程的例子。

Here's an example using threads.

require 'net/http'

urls = [
  {'link' => 'http://www.google.com/'},
  {'link' => 'http://www.yandex.ru/'},
  {'link' => 'http://www.baidu.com/'}
]

urls.each do |u|
  Thread.new do
    u['content'] = Net::HTTP.get( URI.parse(u['link']) )
    puts "Successfully requested #{u['link']}"

    if urls.all? {|u| u.has_key?("content") }
      puts "Fetched all urls!"
      exit
    end
  end
end

sleep

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