Nokogiri parses and searches XML/HTML very quickly, and also has correctly implemented CSS3 selector support as well as XPath 1.0 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('http://www.google.com/search?q=tenderlove')) # 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 end
See Nokogiri::XML::Searchable#css for more information about CSS searching. See Nokogiri::XML::Searchable#xpath for more information about XPath searching.
The version of Nokogiri you are using
More complete version information about libxml
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
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(" <html> <body> <p>first</p> <p>second</p> </body> </html> ") assert_equal('second', doc.html.body.p[1].text)
# File lib/nokogiri.rb, line 113 def Slop(*args, &block) Nokogiri(*args, &block).slop! end
Parse XML. Convenience method for Nokogiri::XML::Document.parse
# File lib/nokogiri/xml.rb, line 33 def XML thing, url = nil, encoding = nil, options = XML::ParseOptions::DEFAULT_XML, &block Nokogiri::XML::Document.parse(thing, url, encoding, options, &block) end
Create a Nokogiri::XSLT::Stylesheet with stylesheet
.
Example:
xslt = Nokogiri::XSLT(File.read(ARGV[0]))
# File lib/nokogiri/xslt.rb, line 12 def XSLT stylesheet, modules = {} XSLT.parse(stylesheet, modules) end
# File lib/nokogiri.rb, line 117 def install_default_aliases # Make sure to support some popular encoding aliases not known by # all iconv implementations. { 'Windows-31J' => 'CP932', # Windows-31J is the IANA registered name of CP932. }.each { |alias_name, name| EncodingHandler.alias(name, alias_name) if EncodingHandler[alias_name].nil? } end
Create a new Nokogiri::XML::DocumentFragment
# File lib/nokogiri.rb, line 90 def make input = nil, opts = {}, &blk if input Nokogiri::HTML.fragment(input).children.first else Nokogiri(&blk) end end
Parse an HTML or XML document. string
contains the document.
# File lib/nokogiri.rb, line 72 def parse string, url = nil, encoding = nil, options = nil if string.respond_to?(:read) || /^\s*<(?:!DOCTYPE\s+)?html[\s>]/i === string[0, 512] # Expect an HTML indicator to appear within the first 512 # characters of a document. (<?xml ?> + <?xml-stylesheet ?> # shouldn't be that long) Nokogiri.HTML(string, url, encoding, options || XML::ParseOptions::DEFAULT_HTML) else Nokogiri.XML(string, url, encoding, options || XML::ParseOptions::DEFAULT_XML) end.tap { |doc| yield doc if block_given? } end
© 2008–2017 Aaron Patterson, Mike Dalessio, Charles Nutter, Sergio Arbeo
Patrick Mahoney, Yoko Harada, Akinori Musha, John Shahid
Licensed under the MIT License.