hf.rb

require 'net/http'
extensions = %w(jpg png jpeg gif)

URLs = Array.new; puts "Gimmie sum urlzorz: (newline to complete)"
while (url = STDIN.gets.chomp) =~ %r http:// ; URLs << url; end

artist = nil; DERP = Class.new(StandardError)
URLs.each do|url| begin raise DERP if artist.nil?
  d, number = url.match( %r http://(?:www.)?([^/]+)/pic-(\d+).html )[1,2]
  domain = "pictures.#{d}"
  
  Net::HTTP.start(domain, 80) do|http|
    raise DERP unless path = extensions.map    {|ext| "/#{artist[0].downcase}/#{artist}/#{number}.#{ext}" }
                                       .detect {|path| http.head(path).code == "200" }
    
    `wget "http://#{domain}#{path}"`
  end
  
rescue DERP
  `open #{url}`; puts "Please enter the artist name:"; artist = STDIN.gets.chomp
  artist = $~[1] if artist =~ %r http://(?:www.)?(?:[^/]+)/user-([^\.]+).php 
  retry
end end