asset_fingerprinter

Asset Fingerprinter

Give credit where credit is due: this gem was Inspired by Eliot Sykes' asset_fingerprinter Rails plugin. We needed something a little more robust at Poll Everywhere that would work outside of Rails in our compass/sass deploymennt pref-flight compilations, so we wrote this little honey.

Humans are stupid and sloppy, so this library is well tested via spec and put through the production ringer at Poll Everywhere.

Installation

Standalone:

gem install asset_fingerprinter

Gemfile:

gem 'asset_fingerprinter'

Getting Started

The Asset Fingerprint gem was designed to work in any environment including Rails and the compass compiler.

Rails 2.x

Holy Caw! We made this work with Rails 2.x because we're old school. Well, almost old school; we assume that you hacked your Rails 2.x install to use Gemfiles. Just add:

gem 'asset_fingerprinter'

to your Rails 2.x Gemfile and we take care of the rest through some hickity-hack magic.

Rails 3.x

Change the asset_path_template in config/environments/production.rb

config.action_controller.asset_path_template = AssetFingerprinter.path_rewriter

Meh, no hack wizardry here. Curse ya Rails 3!

Ha! I'm way more advanced then that...

Cool, we are too. If you want to get down and dirty with AssetFingerprint, RTFSC and discover configuration that looks like:

pr = PathRewriter.new do |pr|
  pr.fingerprinter = Fingerprinter::Digest.new     # Whatever, give us a proc or something that response to .call
  pr.fingerprinter.root = File.dirname(__FILE__)   # Turns out you need a file root for file digesting.
  pr.pattern = PathRewriter::Format::Filename      # Newbs use the query string cachebusters, we use use Filename rewriter, but you can go nuts here with anything that responds to .call
end

# OMG! It threw a file digest into my file name
pr.call('/images/i_am.will') # => '/images/i-am-will-fp-abc3984928abfedf3e2309sb.will'

# Heh, its not a magic bullet, You still need to configure nginx or Apache 
# to rewrite this path. Its totally worth it though.

Be a super hero. Help the world

We'll entertain your pull requests if you have specs around whatever you throw our way. Otherwise we spit at you!

No, We're really interested in more fingerprinting strategies, integrations with other frameworks, and other ways that make serving up HTTP assets ubber fast.