how to change default behaviour of rack offline - ruby-on-rails-3

Question

I am trying to use rack offline in rials to make my webpage available offline. By default rack offline takes all files from the public folder into the cache manifest. In which file should I make changes so that it will take the add the file that I want into the cache manifest. I want to include the file in my views folder.

Answer 1

You need to add it to your routes.rb file. Here is my routes.rb file with a customized manifest. This will give you the index and the new routes as well as all of the html files in your public root (*.html) and every file in a sub-folder to public (*/*.*). You can slice and dice that however you need it for stuff in the public folder.
I don't know how to get the database specific routes like show and edit while offline. I would imagine Javascript is needed. Check out Railscast episode 248 for some ideas for integrating JS
OfflineConfirm::Application.routes.draw do
#match '/application.manifest' => Rails::Offline
resources :contacts
offline = Rack::Offline.configure do
cache ["contacts/new", "contacts"]
public_path = Rails.root.join("public")
Dir[public_path.join("*.html"),
public_path.join("*/*.*")].each do |file|
p = Pathname.new(file)
cache p.relative_path_from(public_path)
end
network "/"
end
match '/application.manifest' => offline
end
The routes file above will produce the following application.manifest
CACHE MANIFEST
# 700ae3e3002382cb98b93c299d7b7bda151183b4703ef65d4c46b0ecf9c46093
contacts/new
contacts
404.html
422.html
500.html
index.html
images/rails.png
javascripts/application.js
javascripts/jquery.js
javascripts/jquery.min.js
javascripts/rails.js
stylesheets/scaffold.css
NETWORK:
/

Answer 2

None of the files in your views folder are available without a server. You want to make a route available in the cache manifest? For instance "/about", which corresponds to a "views/about.haml" file for instance?
Add this to your config:
offline = Rack::Offline.configure do
cache "about" # or whatever your route is
public_path = Rails.public_path
Dir[public_path.join("javascripts/*.js")].each do |file|
cache file.relative_path_from(public_path)
end
end