Retrieve iframe tag having width and height '0' using nokogiri in ruby 1.9.2

Question

I want to retrieve the iframe tags from html code, whose width and height values are 0(zero) using nokogiri gem in Ruby 1.9.2

Answer 1

A single xpath statement will do the trick:

doc.xpath('//iframe[@width="0" and @height="0"]')

This assumes that everything is present in the retrieved HTML. If the iframe, width, or height are only present in the DOM after javascript execution, this will not work.

Answer 2

Reading the nokogiri doc should be enough, but : assuming your html doc is stored in raw_document, you can do doc = Nokogiri::HTML(raw_document). Then you can use doc.css('iframe') to get the list of all iframe tags, and iterate over it to select only the ones you want. Something like doc.css('iframe[width=0], iframe[height=0]') might do it directly, but I can't assure it.