Help with nokogiri

I’m trying to work with nokogiri but I have some problems

I need to iterate a string that has several tags with a base64 image and change it for a url

example:

test</ p><img src=“data:image/png;base64,iVBORw0KGgoAAAANSUhEUgA…” alt = \ “”> bla bla bla <img src=“data:image/png;base64,iVBORw0KGgoAAAANSUhEUgA…” alt = \ “”>”

Change to:

test</ p><img src=“http:www.blablabla.com” alt = \ “”> bla bla bla <img src=“http:www.blablabla.com” alt = \ “”>”

How can I select these img tags, change the src content and return the same string modified ?

Thanks.

Well, I managed to this:

doc = Nokogiri::HTML::DocumentFragment.parse(string)

doc.css(‘img’).map { |i| i.set_attribute(:src, “http://www.blabla.com”) }

p doc.to_s