Ruby：使用open（）和NET :: HTTP模块获取Web内容有什么区别？ [英] Ruby: what is the difference between using open() and NET::HTTP module to fetch web content?

问题描述

一个单独的SO帖子提供了在Ruby中获取Web内容的不同方法，但没有完全解释为什么一个优于另一个。

A separate SO post offers different methods for fetching web content in Ruby, but doesn't fully explain why one is preferable to the other.

使用open（）和NET :: HTTP模块（如下所示）获取Web内容有什么区别？为什么NET :: HTTP被认为是更好的方法？

What is the difference between using open() and the NET::HTTP module, as demonstrated below, to fetch web content? Why is NET::HTTP considered the "better" approach?

**open() 1:**    
require 'open-uri'
file = open('http://hiscore.runescape.com/index_lite.ws?player=zezima')
contents = file.read

**open() 2:**
require 'open-uri'
source = open('http://www.google.com', &:read)

**NET::HTTP 1:**
require 'uri'
require 'net/http'
url = "http://hiscore.runescape.com/index_lite.ws?player=zezima"
r = Net::HTTP.get_response(URI.parse(url).host, URI.parse(url).path)

推荐答案

经验法则：使用 OpenURI 。

原因是 OpenURI 只是 Net :: HTTP ，因此需要编写更少的代码。因此，如果你所做的只是执行简单的GET请求，那就去吧。

The reason is that OpenURI is just a wrapper around Net::HTTP, therefore it will require less code to be written. So if all you do is performing simple GET requests, go for it.

另一方面，更喜欢 Net :: HTTP 如果你想要一些 OpenURI 没有给你的低级功能。它不是更好的方法，但它在配置方面提供了更多灵活性。

On the other hand, prefer Net::HTTP if you want some lower-level functionality that you OpenURI does not give you. It is not a better approach, but it provides more flexibility in terms of configuration.

作为官方文档声明：

如果您只是执行一些GET请求，您应该尝试OpenURI。

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