从带有ruby on rails的网站获取html

Question

如何使用ruby on rails获取网站上其他网站的页面数据？

Answer 1

您可以使用httparty来获取数据

示例代码(来自示例):

require File.join(dir, 'httparty')
require 'pp'

class Google
  include HTTParty
  format :html
end

# google.com redirects to www.google.com so this is live test for redirection
pp Google.get('http://google.com')

puts '', '*'*70, ''

# check that ssl is requesting right
pp Google.get('https://www.google.com')

Nokogiri非常擅长解析这些数据.以下是Railscast的一些示例代码:

url = "http://www.walmart.com/search/search-ng.do?search_constraint=0&ic=48_0&search_query=batman&Find.x=0&Find.y=0&Find=Find"
doc = Nokogiri::HTML(open(url))
puts doc.at_css("title").text
doc.css(".item").each do |item|
  title = item.at_css(".prodLink").text
  price = item.at_css(".PriceCompare .BodyS, .PriceXLBold").text[/\$[0-9\.]+/]
  puts "#{title} - #{price}"
  puts item.at_css(".prodLink")[:href]
end

Answer 2

使用Net/HTTP(例如,阅读此备忘单):

require "net/https"

http = Net::HTTP.new "google.com", 80
request = Net::HTTP::Get.new "/"
response = http.request request

puts response.code
puts response.body