Ruby-Query
jQuery for command line and ruby. It make extract simple data fun and easy.
It use Nokogiri for CSS extraction. Inspired by node Query
Installation
$ gem install ruby-query
Ruby Examples
Extract an attribute from a webpage:
require 'open-uri'
require 'ruby_query'
RubyQuery::Query.query(open("http://twitter.com"), "a#logo img", "attr", "alt")
=> "Twitter"
Extract a form input value :
require 'ruby_query'
RubyQuery::Query.query('<input type="text" value="[email protected]"/>', "input", "val")
=> "[email protected]"
Command Line Examples
Twitter logo alt text:
$ curl http://twitter.com | rquery 'a#logo img' attr alt
Twitter
Alternately, since the output is simply more html, we can achieve this same result via pipes:
$ curl http://twitter.com | rquery 'a#logo' | rquery img attr alt
Twitter
Check if a class is present:
$ curl http://twitter.com | rquery '.article #timeline' hasClass statuses
true
Grab width or height attributes:
$ echo '<div class="user" width="300"></div>' | rquery div.user width
300
Output element text:
$ echo '<p>very <em>slick</em></p>' | rquery p text
very slick
Values:
$ echo '<input type="text" value="[email protected]"/>' | rquery input val
[email protected]
Get second li's text:
$ echo '<ul><li>Apple</li><li>Orange</li><li>Cat</li></ul>' | rquery ul li get 1 text
Orange
Get third li's text using next
:
$ echo '<ul><li>Apple</li><li>Orange</li><li>Cat</li></ul>' | rquery ul li get 1 next text
Cat
Get length:
$ echo '<ul><li></li><li></li></ul>' | query li length
2
Contributing to RQuery
- Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet
- Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
- Fork the project
- Start a feature/bugfix branch
- Commit and push until you are happy with your contribution
- Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.
- Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.
Copyright
Copyright (c) 2011 Francis Chong. See LICENSE.txt for further details.