| Path: | README | 
| Last Update: | Thu Nov 08 17:51:17 -0500 2007 | 
Spider, a Web spidering library for Ruby. It handles the robots.txt, scraping, collecting, and looping so that you can just handle the data.
 require 'spider'
 Spider.start_at('http://mike-burns.com/') {}
 require 'spider'
 Spider.start_at('http://mike-burns.com/') do |s|
   s.on :failure do |a_url, resp, prior_url|
     puts "URL failed: #{a_url}"
     puts " linked from #{prior_url}"
   end
 end
 require 'spider'
 Spider.start_at('http://mike-burns.com/') do |s|
   s.on :success do |a_url, resp, prior_url|
     puts "#{a_url}: #{resp.code}"
     puts resp.body
     puts
   end
 end
 require 'spider'
 Spider.start_at('http://mike-burns.com/') do |s|
   s.add_url_check do |a_url|
     a_url =~ %r{^http://mike-burns.com.*}
   end
 end
 require 'spider'
 Spider.start_at('http://mike-burns.com/') do |s|
   s.setup do |a_url|
     if a_url =~ %r{^http://.*wikipedia.*}
       headers['User-Agent'] = "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
     end
   end
 end
 require 'spider'
 require 'spider/included_in_memcached'
 SERVERS = ['10.0.10.2:11211','10.0.10.3:11211','10.0.10.4:11211']
 Spider.start_at('http://mike-burns.com/') do |s|
   s.check_already_seen_with IncludedInMemcached.new(SERVERS)
 end
 require 'spider'
 class ExpireLinks < Hash
   def <<(v)
     [v] = Time.now
   end
   def include?(v)
     [v] && (Time.now + 86400) <= [v]
   end
 end
 Spider.start_at('http://mike-burns.com/') do |s|
   s.check_already_seen_with ExpireLinks.new
 end
 require 'spider'
 nodes = {}
 Spider.start_at('http://mike-burns.com/') do |s|
   s.add_url_check {|a_url| a_url =~ %r{^http://mike-burns.com.*} }
   s.on(:every) do |a_url, resp, prior_url|
     nodes[prior_url] ||= []
     nodes[prior_url] << a_url
   end
 end
 require 'net/http_configuration'
 require 'spider'
 http_conf = Net::HTTP::Configuration.new(:proxy_host => '7proxies.org',
                                          :proxy_port => 8881)
 http_conf.apply do
   Spider.start_at('http://img.4chan.org/b/') do |s|
     s.on(:success) do |a_url, resp, prior_url|
       File.open(a_url.gsub('/',':'),'w') do |f|
         f.write(resp.body)
       end
     end
   end
 end
Mike Burns mike-burns.com mike@mike-burns.com
Help from Matt Horan, John Nagro, and Henri Cook.
With `robot_rules’ from James Edward Gray II via blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/177589