From: Mark Thomas <mark@...>
Date: 2008-10-08T02:38:14+09:00
Subject: Re: Hpricot elem index/position

On Oct 7, 10:28 am, "henryturnerli...@googlemail.com"
<henryturnerli...@googlemail.com> wrote:
> Well, I suppose there are incorrectly formatted links too... I was
> talking about correctly formatted links that point to a 400+ status
> code resource. Something libxml would not pick up since I guess you're
talking about its syntax checking bit.

Well, libxml stores the line number of every element. So you can
extract all links, check them, and print out element.line_num for each
one that fails the check.

Here's some starter code:

#----------------------------------------------

require 'rubygems'
require 'xml'

XML::Parser.default_line_numbers = true

html = <<END_HTML
  <html>
  <head><title>test</title></head>
  <body>
    Here is a <a href="http://brok.en">broken link.</a>
  </body>
  </html>
END_HTML

parser = XML::Parser.string html
doc = parser.parse

def broken?(link)
  true
end

doc.find("//a[@href]").each do |link|
  if broken?(link)
    puts "Broken link to #{link['href']} on line #{link.line_num}"
  end
end