waffle

Wepricot.fetch('http://google.com') do |result|
    puts "URL: #{result.url.absoluteString}, source: #{result.html}"
    i = 0
    (result / 'img').each do |node|
        src = node['src']
        resource = result[src]
        puts "DOM traversed img (##{i}) with src: #{src}"
        puts "resource: #{resource.MIMEType}, #{resource.data.length} bytes"
        i += 1
    end
end

You wonder why I like MacRuby. I wrote the beginnings of a layer in one and a half hours and 190 lines of code to essentially replace what I use Hpricot for (parsing HTML into a tree), but by using WebKit it gets “native” access to the DOM, selector queries and the loaded resources themselves.

Output:

URL: http://www.google.com/, source: [..snip..]
DOM traversed img (#0) with src: /intl/en_ALL/images/logo.gif
resource: image/gif, 8558 bytes

That is exactly why I love MacRuby. Mad ideas implemented in a jiffy by crossing the streams.

Update: this code is now available.