Want a bunch of harmless looking desktop backgrounds?

desktop_scraper.rb

require 'rubygems'
require 'mechanize'

class DesktopScraper

  BASE = "http://simpledesktops.com"

  def destination_folder
    File.dirname(__FILE__) + "/desktops"
  end

  def initialize
    @posts = []
  end

  def agent
    @agent ||= Mechanize.new
  end

  def get url
    agent.get url
  end

  def doc
    Nokogiri::HTML.parse(agent.page.body)
  end

  def run
    # get the profile urls...
    (1..36).to_a.each do |page|
      get("#{BASE}/browse/#{page}")
      links = doc.css('.desktops .edge .desktop a').to_a.map do |node|
        node.attribute('href').value
      end.select do |href|
        href =~ /browse/
      end.map do |href|
        BASE + href
      end.uniq
      @posts += links
      @posts.uniq!
    end
    # go to each profile url
    @posts.each_with_index do |url,index|
      get url
      get (BASE + doc.at_css('.desktop a').attribute('href').value)
      agent.page.save "#{destination_folder}/#{agent.page.filename}"
    end
  end

end

DesktopScraper.new().run