[lnkForumImage]
TotalShareware - Download Free Software

Confronta i prezzi di migliaia di prodotti.
Asp Forum
 Home | Login | Register | Search 


 

Forums >

comp.lang.ruby

[ANN] nokogiri 1.2.0 Released

Aaron Patterson

2/23/2009 4:22:00 AM

nokogiri version 1.2.0 has been released!

* <http://nokogiri.rubyforg...
* <http://github.com/tenderlove/nokogiri...
* <http://github.com/tenderlove/nokogiri/tree/...
* <http://rubyforge.org/mailman/listinfo/nokogir...
* <http://nokogiri.lighthouseapp.com/projects/19607-nokogiri/ov...

Nokogiri (é?¸) is an HTML, XML, SAX, and Reader parser.

Changes:

### 1.2.0 / 2008-02-22

* New features

* CSS search now supports CSS3 namespace queries
* Namespaces on the root node are automatically registered
* CSS queries use the default namespace
* Nokogiri::XML::Document#encoding get encoding used for this document
* Nokogiri::XML::Document#url get the document url
* Nokogiri::XML::Node#add_namespace add a namespace to the node LH#38
* Nokogiri::XML::Node#each iterate over attribute name, value pairs
* Nokogiri::XML::Node#keys get all attribute names
* Nokogiri::XML::Node#line get the line number for a node (Thanks Dirkjan Bussink!)
* Nokogiri::XML::Node#serialize now takes an optional encoding parameter
* Nokogiri::XML::Node#to_html, to_xml, and to_xhtml take an optional encoding
* Nokogiri::XML::Node#to_str
* Nokogiri::XML::Node#to_xhtml to produce XHTML documents
* Nokogiri::XML::Node#values get all attribute values
* Nokogiri::XML::Node#write_to writes the node to an IO object with optional encoding
* Nokogiri::XML::ProcessingInstrunction.new
* Nokogiri::XML::SAX::PushParser for all your push parsing needs.

* Bugfixes

* Fixed Nokogiri::XML::Document#dup
* Fixed header detection. Thanks rubikitch!
* Fixed a problem where invalid CSS would cause the parser to hang

* Deprecations

* Nokogiri::XML::Node.new_from_str will be deprecated in 1.3.0

* API Changes

* Nokogiri::HTML.fragment now returns an XML::DocumentFragment (LH #32)

## FEATURES:

* XPath support for document searching
* CSS3 selector support for document searching
* XML/HTML builder
* Drop in replacement for Hpricot (though not bug for bug)

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

Here is a speed test:

* http://gist.github...

Nokogiri also features an Hpricot compatibility layer to help ease the change
to using correct CSS and XPath.

## SUPPORT:

The Nokogiri mailing list is available here:

* http://rubyforge.org/mailman/listinfo/nok...

The bug tracker is available here:

* http://nokogiri.lighthouseapp.com/projects/19607-nokogir...

## SYNOPSIS:

require 'nokogiri'
require 'open-uri'

doc = Nokogiri::HTML(open('http://www.google.com/search?q=tende...))

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

####
# Search for nodes by xpath
doc.xpath('//h3/a[@class="l"]').each do |link|
puts link.content
end

####
# Or mix and match.
doc.search('h3.r a.l', '//h3/a[@class="l"]').each do |link|
puts link.content
end


## REQUIREMENTS:

* ruby 1.8 or 1.9
* libxml
* libxslt

## INSTALL:

* sudo gem install nokogiri

* <http://nokogiri.rubyforg...
* <http://github.com/tenderlove/nokogiri...
* <http://github.com/tenderlove/nokogiri/tree/...
* <http://rubyforge.org/mailman/listinfo/nokogir...
* <http://nokogiri.lighthouseapp.com/projects/19607-nokogiri/ov...

--
Aaron Patterson
http://tenderlovem...

4 Answers

Phlip

2/23/2009 4:26:00 AM

0

Aaron Patterson wrote:

> nokogiri version 1.2.0 has been released!

grabbed! Tx!

Phlip

2/23/2009 4:44:00 AM

0

Aaron Patterson wrote:

> nokogiri version 1.2.0 has been released!

The following is a question, if I got it wrong, and a code snippet if I didn't.

To add nokogiri to a Merb project's Cucumber featurizer, I...

Added it to features/support/env.rb:

require "merb-core"
require "spec"
require "merb_cucumber/world/simple"
require 'nokogiri' # <-- with the correct style of quote 'ticks'!

Added its calls to features/steps/result_steps.rb

When /^you go to (.*)/ do |text|
@response = request(text)
@xdoc = Nokogiri::HTML(@response.body.to_s)
end

Then /^you should see an? (.+) element$/ do |searcher|
@xdoc.css(searcher).should_not be_nil
end

Called its steps from features/comics.feature:

Feature: serve webcomics

Scenario: root page
When you go to /
Then you should see an img.comic element

The result is the usual bunch of pale green. (But note that I personally suck at
writing customer-facing verbiage. They don't care if they see an img with a
class of comic! They want to see a comic image! More verbiage tuning is in order...)

Also note that I suck at writing RSpec matchers. The point of all this is clear
error messages at fault time, and my .should_not be_nil is also not particularly
exemplary!

So thanks for the lib! it's going to the top of my list from now on...

--
Phlip
http://localhost:4000/Pigleg_Too/1

Phlip

2/23/2009 5:28:00 AM

0

> Then /^you should see an? (.+) element$/ do |searcher|
> @xdoc.css(searcher).should_not be_nil
> end

Nooop. I forgot to test that in the negative - by changing the Then commandment,
and seeing if it fails cleanly. It did not, possibly because a failing CSS hit
does not return a nil.

After changing to should_not be_blank, I then upgraded the verbiage in the
featurizer:

Then /^you should see an? (.+) (.+)$/ do |style, element|
element = { 'image' => 'img' }.fetch(element, element)
@xdoc.css("#{element}.#{style}").should_not be_blank
end

....

When you go to /
Then you should see a comic image

The {} is speculative coding; if I had a real client asking for these features,
they might write 'panel', which I must then translate to <div>...

Ryan Davis

2/23/2009 6:54:00 AM

0


On Feb 22, 2009, at 20:49 , Phlip wrote:

> require 'nokogiri' # <-- with the correct style of quote 'ticks'!

huh?