cache manifest with asset pipeline

Question

What would be the best way to have a html5 cache manifest with the rails asset pipeline? I'm thinking of adding an erb file to app/assets that has the paths of all the assets contained in it. This would work but has a couple problems right off the bat:

How could I increment the version number?
How can I make sure the http content type is set correctly?

score 1 · Answer 1 · edited Aug 04 '12 at 20:46

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Here's how we're doing it on an app right now:

To handle the generation of the cache manifest file, we are using Rack::Offline
We then configure this to point to, for instance, "/assets/application.css"
In the layouts/views, we are NOT using the stylesheet_link_tag, javascript_include_tag or image_tag helpers for cache-able assets so that we don't get a link to the assets with the hash in it, eg "/assets/application-2345234...2344.css"

This works because when the assets are precompiled, rake assets:precompile:nondigest creates versions of the files without the hash in the name, and then Rack::Offline checks these to generate a new manifest (or not).

edited Aug 04 '12 at 20:46

Andreas Köberle

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answered Oct 20 '11 at 19:18

Marc

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I've also used this approach and it works for now. But this is certainly not a solution I'd like to keep over longer period time. It's more a hack than a proper way to do it :) I've been looking for a solution to get rack-offline and assets pipeline work nice together but have not yet found a way. Anyone else got rack-offline and rails' 3.1 assets pipeline working nice together? – Lenart Jan 16 '12 at 14:21
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Couldn't you get around the third point by setting `config.assets.digest = false` in `production.rb`? – dazonic Jan 18 '12 at 07:30

score -4 · Answer 2 · answered Nov 20 '11 at 00:49

-4

Sprockets provides you with one by default.

in one of your environment configs (/config/environments/development.rb)

config.assets.compress = false
config.assets.debug = false

and in your html file:

<html manifest="manifest.yml">

running

rake:precompile

will give you a manifest file to public/assets/manifest.yml

answered Nov 20 '11 at 00:49

shanejonas

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This actually isn't in the HTML5 offline cache manifest format - it won't work. – Alex MacCaw Jan 28 '12 at 18:24
Voted down b/c this is a yml file not an appcache manifest... Out of curiosity though, what browsers support this (if any)? – mwoods79 Aug 13 '12 at 20:34
A better answer would have been to use this YAML file but not sure it will be complete (missing image for example). – Olivier Amblet Nov 21 '12 at 11:48

cache manifest with asset pipeline

2 Answers2