knu / webrobots

A Ruby library to help write robots.txt compliant web robots

webrobots¶ ↑

This is a library to help write robots.txt compliant web robots.

Usage¶ ↑

require 'webrobots'
require 'uri'
require 'net/http'

robots = WebRobots.new('MyBot/1.0')

uri = URI('http://digg.com/news/24hr')
if robots.disallowed?(uri)
  STDERR.puts "Access disallowed: #{uri}"
  exit 1
end
body = Net::HTTP.get(uri)
# ...

Requirements¶ ↑

• Ruby 1.8.7 or 1.9.2+

Contributing to webrobots¶ ↑

• Check out the latest master to make sure the feature hasn’t been implemented or the bug hasn’t been fixed yet

• Check out the issue tracker to make sure someone already hasn’t requested it and/or contributed it

• Fork the project

• Start a feature/bugfix branch

• Commit and push until you are happy with your contribution

• Make sure to add tests for it. This is important so I don’t break it in a future version unintentionally.

• Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

Copyright¶ ↑

Copyright © 2010-2016 Akinori MUSHA. See LICENSE.txt for further details.

webrobots's Issues

gemspec date error

I'm trying to install the latest mechanize gem. However it has a dependency on webrobots 0.0.10, and I'm getting an error when trying to install with bundler.

.../webrobots-0.0.10.gemspec]: invalid date format in specification: "2011-07-01 00:00:00.000000000Z

Enable externalization of Crawl-delay directive enforcement from allowed?() and disallowed?().

Consider the following use case. A web crawler downloads an HTML page from a site that has a robots.txt Crawl-delay directive and it wants to filter out links on the page that it is not allowed to crawl. Each call to disallowed?(url) (or allowed?(url) for that matter) will enforce the crawl delay. It would be much better to allow the web crawler to respect the crawl delay before it requests resources that it is allowed to access.