TrueURL

TrueURL helps normalize, clean and derive a canonical URL for any given URL. Unlike other similar projects, TrueURL uses a configurable multi-strategy approach, including tailored strategies for specific sites (e.g. YouTube, DailyMotion, Twitter, etc.) as well as general strategies (e.g. rel="canonical", etc.).

Install the gem from RubyGems:

gem install true_url

If you use Bundler, just add it to your Gemfile and run bundle install

gem 'true_url'

I have only tested this gem on Ruby 2.3.0, but there shouldn't be any reason why it wouldn't work on earlier Ruby versions as well. TrueURL only requires the Addressable gem as a dependency. if page fetching is required, then the HTTP and Nokogiri gems are also required as dependencies.

x = TrueURL.new("https://youtu.be/RDocnbkHjhI?list=PLs4hTtftqnlAkiQNdWn6bbKUr-P1wuSm0")
puts x.canonical # => https://www.youtube.com/watch?v=RDocnbkHjhI

x = TrueURL.new("http://embed.nicovideo.jp/watch/sm25956031/script?w=490&h=307&redirect=1")
puts x.canonical # => http://www.nicovideo.jp/watch/sm25956031

x = TrueURL.new("http://t.co/fvaGuRa5Za")
puts x.canonical # => http://www.prdaily.com/Main/Articles/3_essential_skills_for_todays_PR_pro__18404.aspx

• URLCanonicalize
• UrlParser
• PostRank URI
• Linkr
• Pope