如何在Ruby中获取网页的HTML源代码

Question

在Firefox或Safari等浏览器中,如果网站处于打开状态,我可以右键单击该页面,然后选择"查看页面源"或"查看源"等内容.这显示了页面的HTML源代码.

在Ruby中,是否有一个函数(可能是一个库)允许我将这个HTML源存储为变量？像这样的东西:

source = view_source(http://stackoverflow.com)

源将是这个文本:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Stack Overflow</title>
etc

Answer 1

require 'net/http'

source = Net::HTTP.get('stackoverflow.com', '/index.html')

Answer 2

require 'open-uri'
source = open(url){|f|f.read}

UPD:更现代的语法

require 'open-uri'
source = open(url, &:read)

Answer 3

require 'open-uri'
source = open(url).read

简短,简单,甜美.

Answer 4

是的,像这样:

require 'open-uri'

open('http://stackoverflow.com') do |file|
    #use the source Eric
    #e.g. file.each_line { |line| puts line }
end