nokogiri如何使用

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mac gem install nokogiri error

Gem::Ext::BuildError: ERROR: Failed to build gem native extension. /Users/angela/.rbenv/versions/1.9.3-p545/bin/ruby -r ./siteconf20170106-59264-robjdg.rb extconf.rb --use-system-libraries checking if the C compiler accepts ... yes checking if the C…

直接来个简单的代码实例就明白啦! require 'nokogiri' xml_data=<<XML <library> <NAME><![CDATA[Favorite Books]]></NAME> <book ISBN="> <title>To Kill A Mockingbird</title> <description><![CDATA[Description#1]]>…

Ruby:Nokogiri

阅读推荐: Nokogiri的用法我推荐三篇非常给力的文章: http://ruby.bastardsbook.com/chapters/html-parsing/ http://ruby.bastardsbook.com/chapters/web-inspecting-traffic/ http://ruby.bastardsbook.com/chapters/web-crawling/…

Nokogiri爬虫教程

Parsing HTML with Nokogiri http://ruby.bastardsbook.com/chapters/html-parsing/ Inspecting a Webpage's Traffic http://ruby.bastardsbook.com/chapters/web-inspecting-traffic/ Writing a Web Crawler http://ruby.bastardsbook.com/chapters/web-crawling/…

[翻译][Nokogiri官方教程] 解析HTML/XML文档 / Parsing an HTML/XML Document

From a String From a File From the Internet Parse Options Encoding 原文: Parsing an HTML/XML Document 解析HTML/XML文档从字符串读取 html_doc = Nokogiri::HTML("<html><body><h1>Mr. Belvedere Fan Club</h1></body></html>") xm…

nokogiri

Nokogiri的用法我推荐三篇非常给力的文章:http://ruby.bastardsbook.com/chapters/html-parsing/http://ruby.bastardsbook.com/chapters/web-inspecting-traffic/http://ruby.bastardsbook.com/chapters/web-crawling/ http://www.cnblogs.com/hongfei/p/3693766.html…

Ruby nokogiri 解析xml的简单实例

require 'nokogiri'XML_FILE = "C:\\Users\\chenpassion\\Desktop\\20130806.xml"xml = Nokogiri::XML.parse(File.read(XML_FILE), XML_FILE)xml.xpath('//NewspaperReport').each {|x| if !x.attributes.include?("DownloadState") || x.attributes[…

Ruby爬虫header发送cookie，nokogiri解析html数据

之前用php写过一个爬虫,同样是获取局域网的网站数据,这次我使用相同的网络环境,更低的电脑配置,使用ruby来再次爬虫,惊人的发现ruby使用自带的类库net/http爬取速度要远远超过php的curl_*函数.在循环爬取网页时,ruby的cpu占用率上达到了40-70%,而php仅仅使用了可怜的5-10%,目前还不知这其中的奥秘,理论上都是使用的单线程,差距这么大是解释器还是类库的差距呢? 不管了,以后再做性能测试,简单说一下过程. 安装两个包 gem install mysql2 gem i…

nokogiri Fail install on Ruby 2.3 for Windows #1456 <From github>

Q: gem install railson nokogiri install fail with error: 'nokogiri requires Ruby version < 2.3, >= 1.9.2.' gem install nokogiri -v '1.6.5'solve problem of installationbutgem updateagain fails A: A quick workaround is the following (ruby 2.3 win64):…

CocoaPod 使用方法

huangyichengdeMacBook-Pro:~ Jack$ pod search AFNetworking/Library/Ruby/Site/2.0.0/rubygems.rb:250:in `find_spec_for_exe': can't find gem cocoapods (>= 0.a) (Gem::GemNotFoundException) from /Library/Ruby/Site/2.0.0/rubygems.rb:278:in `activate_bin_…