Polipus

A distributed web crawler written in ruby, backed by Redis This project has been presented to the RubyDay2013 http://www.slideshare.net/francescolaurita/roll-your-own-web-crawler-rubyday

Features

Easy to use
Distributed and scalable
It uses a smart/fast and space-efficient probabilistic data structure to determine if an url should be visited or not
It doesn't exaust your Redis server
Play nicely with MongoDB even if it is not strictly required
Easy to write your own page storage strategy
Focus crawling made easy
Heavily inspired to Anemone https://github.com/chriskite/anemone/

Supported Ruby Interpreters

MRI 1.9.x >= 1.9.1
MRI 2.0.0
MRI 2.1.2
JRuby 1.9 mode
Rubinius

Survival code example

require "polipus"

Polipus.crawler("rubygems","http://rubygems.org/") do |crawler|
  # In-place page processing
  crawler.on_page_downloaded do |page|
    # A nokogiri object
    puts "Page title: '#{page.doc.css('title').text}' Page url: #{page.url}"
  end
end

Installation

$ gem install polipus

Testing

$ bundle install
$ rake

Contributing to polipus

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.
Install Rubocop and make sure it is happy
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.

ABrisset/polipus

Polipus

Features

Supported Ruby Interpreters

Survival code example

Installation

Testing

Contributing to polipus

Copyright