From: Peter Szinek <peter@...>
Date: 2007-11-26T20:48:11+09:00
Subject: Re: Easy way for a Nuub to get link-element from a html-source

Marcus Strube wrote:
> hi all.
> 
> im very new to ruby and im not sure how to do this the easiest way in
> ruby. i want to read the content from e.g. "www.spiegel.de" and just
> this line
> 
> <link rel="alternate" type="application/rss+xml" title="SPIEGEL ONLINE
> als RSS-Feed" href="http://www.spiegel.de/schlagzeilen/rss/index.xml" />
> 
> and from this line the "title" and the "href"
> 
> since the order in "link" is not sure, it doesnt look like regexp is the
> first choice. and i couldn't find a HTML::Parse.

Another possibility is scRUBYt!:

==========================================
require 'rubygems'
require 'scrubyt'

feed_data = Scrubyt::Extractor.define do
   fetch 'http://www.spiegel.de/'

   link "//link[@rel='alternate']" do
     title "title", :type => :attribute
     href  "href", :type => :attribute
   end
end

puts feed_data.to_xml
==========================================

output:

==========================================
<root>
   <link>
     <title>SPIEGEL ONLINE als RSS-Feed</title>
     <href>http://www.spiegel.de/schlagzeilen/rss/index.xml</href>
   </link>
</root>
==========================================

or, to_hash:

==========================================
[{:title=>"SPIEGEL ONLINE als RSS-Feed", 
:href=>"http://www.spiegel.de/schlagzeilen/rss/index.xml"}]
==========================================

Cheers,
Peter
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