Service Workers on Rails
This sandbox demonstrates various use cases for "Service Workers on Rails". Integration of Service Workers with the Rails asset pipeline is provided by the serviceworker-rails gem.
The Service Worker API is coming. Service Workers are scripts that act as a proxy between the browser and the server. Among other things, Service Workers can be used to:
- enable the creation of effective offline experiences
- increase perceived performance while online
- access push notifications and background sync APIs.
Service Workers are scripts that live outside the context of a rendered page. This means that there are some considerations for hosting Service Workers:
- service workers must be served over HTTPS
- service workers must be served within the "scope" of the page(s) they control (pending override capability)
- service workers should not be cached: browsers install service workers in the background so requesting and evaluating these scripts will not tie up page rendering
This is where the serviceworker-rails gem comes in. Using
serviceworker-rails in your Rails app allows you to map Service Worker endpoints to bundled Rails assets and adds the appropriate (configurable) response headers. You can still take advantage of Rails pipeline with Service Workers in development and production!
The sandbox serviceworker initializer in
config/initializers/serviceworker.rb provides several examples for customizing how service worker endpoints should map to assets in the Rails asset pipeline. Corresponding serviceworker implementations for the examples can be found in
Examples in this sandbox are inspired by a variety of resources:
- Mozilla's Service Worker Cookbook
- Jake Archibald's Offline Cookbook
- Pony Foo Service Worker Articles
Check out the project with git, run
bundle install and copy the
database.yml and edit to fit your needs.
You could also try running with Docker. The
docker-compose.yml assumes the
existence of an
.env.docker file. You may want copy the
file and set up your own environment variables. Assuming you have Docker
installed and running, you could simply try running
docker-compose up. YMMV.
If desired, for certain features you'll need Twitter app credentials. Example keys can be found in
Bug reports and pull requests are welcome on GitHub at https://github.com/rossta/serviceworker-rails-sandbox. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
The gem is available as open source under the terms of the MIT License.