manifesto

Manifesto dynamically generates an HTML5 cache manifest for offline application caching. It returns a list of files within the specified directory and sub-directories. By default it also includes a computed hash of the files’ contents, so that if a file is changed a different hash is produced, causing the cache to be automatically invalidated.

Requirements

• Ruby >= 1.8.6 (not tested with previous versions)

Manifesto has been successfully tested against the following Ruby releases:

• Ruby 1.8.6

• Ruby 1.8.7

• Ruby 1.9.1

Installation

This library is intended to be installed as a Gem.

$ gem install manifesto

You might need administrator privileges on your system to install it.

Usage

# Basic usage, list all non-hidden files in ./public and include a computed hash of their contents
Manifesto.cache

# Specify a directory
Manifesto.cache :directory => './mobile'

# Specify a directory and don't compute the hash
Manifesto.cache :directory => './mobile', :compute_hash => false

Sample Output

CACHE MANIFEST
# Generated by manifesto (http://github.com/johntopley/manifesto)
# Hash: 7013a3b8292ceeeb6336849bee1d1365
/apple-touch-icon.png
/apple-touch-startup.png
/index.html
/mobile/mobile.css
/mobile/mobile.js

Sinatra Example

require 'manifesto.rb'

get '/manifest' do
  headers 'Content-Type' => 'text/cache-manifest' # Must be served with this MIME type
  Manifesto.cache
end

Ruby on Rails Example

• Create a route for the cache manifest:

  map.manifest '/manifest', :controller => 'manifest', :action => 'show' # Rails 2.x
  
  -- or --
  
  match '/manifest' => 'manifest#show' # Rails 3.x

• Create a controller action:

  def show
    headers['Content-Type'] = 'text/cache-manifest'
    render :text => Manifesto.cache, :layout => false
  end
  

Issues

Please use the GitHub issues tracker.

Note on Patches/Pull Requests

• Fork the project

• Make your feature addition or bug fix

• Add tests for it. This is important so I don’t break it in a future version unintentionally

• Commit, do not mess with rakefile, version, or history (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

• Send me a pull request. Bonus points for topic branches

Thanks

• Thanks to Nasir Jamal for helping me with RSpec.

Copyright

Copyright © 2010 John Topley. See LICENSE for details.