grabber.rb

grabber.rb

require 'net/http'                                                          
require 'uri'
return p "wrong arguments" if ARGV.length < 2

url = ARGV[0]
dest_path = ARGV[1]

html = Net::HTTP.get(URI(url));
html.scan(/<img.*?src.*?['|"](http.*?)['|"]/).each do |match|
  img_url = URI(match[0])
  name = File.basename(img_url.path)
  img = Net::HTTP.get(URI(img_url));
  path = File.join(dest_path, name)
  File.open(path, 'w') do |file|
    p "Writing file  #{path}"
    file.write(img)
  end
end