My program collects all redirection addresses but I could not do the same with the image tags
require 'nokogiri'
require 'net/http'
pagina = Net::HTTP.get(ARGV[0],ARGV[1])
enlaces = Nokogiri::HTML(pagina).xpath('//a[@href]').map { |link| link['href'] }
imagenes = Nokogiri::HTML(pagina).xpath('//img/src').map { |link| link['src'] }
puts "Los enlaces son: "
puts enlaces
puts "Las imagenes son: "
puts imagenes
If the page you process is normal HTML, then the problem is that you are trying to read the src tag inside the img tag, when what you want to read is the src attribute of the% tag img (something like what you do with the href of the a tags).
Then you just have to change to //img[@src] in this line of code:
imagenes = Nokogiri::HTML(pagina).xpath('//img[@src]').map { |link| link['src'] }