sudo gem install nokogiri

An HTML, XML, SAX, & Reader parser with the ability to search documents via XPath or CSS3 selectors… and much more


Module Nokogiri

Nokogiri parses and searches XML/HTML very quickly, and also has correctly implemented CSS3 selector support as well as XPath support.

Parsing a document returns either a Nokogiri::XML::Document, or a Nokogiri::HTML::Document depending on the kind of document you parse.

Here is an example:

require 'nokogiri'
require 'open-uri'

# Get a Nokogiri::HTML:Document for the page we’re interested in...

doc = Nokogiri::HTML(open(''))

# Do funky things with it using Nokogiri::XML::Node methods...

# Search for nodes by css
doc.css('h3.r a.l').each do |link|
puts link.content

See Nokogiri::XML::Node#css for more information about CSS searching. See Nokogiri::XML::Node#xpath for more information about XPath searching.



The version of Nokogiri you are using


More complete version information about libxml

Public Class Methods

HTML(thing, url = nil, encoding = nil, options = XML::ParseOptions::DEFAULT_HTML, &block) Show Source

Parse HTML. Convenience method for Nokogiri::HTML::Document.parse

# File lib/nokogiri/html.rb, line 14 def HTML thing, url = nil, encoding = nil, options = XML::ParseOptions::DEFAULT_HTML, &block Nokogiri::HTML::Document.parse(thing, url, encoding, options, &block) end
Slop(*args, &block) Show Source

Parse a document and add the Slop decorator. The Slop decorator implements method_missing such that methods may be used instead of CSS or XPath. For example:

doc = Nokogiri::Slop(<<-eohtml)
assert_equal('second', doc.html.body.p[1].text)
# File lib/nokogiri.rb, line 107 def Slop(*args, &block) Nokogiri(*args, &block).slop! end
XML(thing, url = nil, encoding = nil, options = XML::ParseOptions::DEFAULT_XML, &block) Show Source

Parse XML. Convenience method for Nokogiri::XML::Document.parse

# File lib/nokogiri/xml.rb, line 32 def XML thing, url = nil, encoding = nil, options = XML::ParseOptions::DEFAULT_XML, &block Nokogiri::XML::Document.parse(thing, url, encoding, options, &block) end
XSLT(stylesheet, modules = {}) Show Source

Create a Nokogiri::XSLT::Stylesheet with stylesheet.


xslt = Nokogiri::XSLT([0]))
# File lib/nokogiri/xslt.rb, line 12 def XSLT stylesheet, modules = {} XSLT.parse(stylesheet, modules) end
make(input = nil, opts = {}) Show Source

Create a new Nokogiri::XML::DocumentFragment

# File lib/nokogiri.rb, line 84 def make input = nil, opts = {}, &blk if input Nokogiri::HTML.fragment(input).children.first else Nokogiri(&blk) end end
parse(string, url = nil, encoding = nil, options = nil) Show Source

Parse an HTML or XML document. string contains the document.

# File lib/nokogiri.rb, line 65 def parse string, url = nil, encoding = nil, options = nil doc = if string.respond_to?(:read) || string =~ /^s*<[^Hh>]*html/ # Probably html Nokogiri.HTML( string, url, encoding, options || XML::ParseOptions::DEFAULT_HTML ) else Nokogiri.XML(string, url, encoding, options || XML::ParseOptions::DEFAULT_XML) end yield doc if block_given? doc end