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#!/usr/bin/env ruby

require 'rubygems'
require 'open-uri'
require 'net/http'
require 'hpricot'
require 'uri'

site = ARGV[0];

def get_size(url)
  uri = URI.parse(url)
  response = nil
  Net::HTTP.start(uri.host, uri.port) do |http|
    response = http.head(uri.path + ((uri.query) ? "?#{uri.query}" : ""))
  end
  response["content-length"].to_i
end

if site
  images = []
  
  base = site.gsub(/[^\/]+$/, '')
  full_base = base.gsub(/^(.+\/\/[^\/]+).*/, '\1')

  doc = Hpricot(open(site))
  (doc / "img").each do |image|
    
    src = image.attributes["src"]
    src = "#{full_base}#{src}" if src.match(/^\//)
    src = "#{base}#{src}" unless src.match(/^http/)
    
    width = image.attributes["width"].to_i
    height = image.attributes["height"].to_i
    
    size = 0
    
    if (width.zero? && height.zero?)
      # make a HEAD request
      size = get_size(src)
    end
    
    images << { :src => src, :width => width, :height => height, :size => size || height * width}
  end
  
  images.sort! { |a, b| a[:size] <=> b[:size] }
  
  images.reverse.each do |image|
    puts "<img src='#{image[:src]}'/>#{image.inspect}"
  end
end