Skip to content
Go to file

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time

Gem Version Build

Lite Cable

Lightweight ActionCable implementation.

Contains application logic (channels, streams, broadcasting) and also (optional) Rack hijack based server (suitable only for development and test due to its simplicity).

Compatible with AnyCable (for production usage).

Sponsored by Evil Martians



Add this line to your application's Gemfile:

gem "litecable"

And run bundle install.


Please, checkout Action Cable guides for general information. Lite Cable aims to be compatible with Action Cable as much as possible without the loss of simplicity and lightness.

You can use Action Cable javascript client without any change (precompiled version can be found here).

Here are the differences:

  • Use LiteCable::Connection::Base as a base class for your connection (instead of ActionCable::Connection::Base)

  • Use LiteCable::Channel::Base as a base class for your channels (instead of ActionCable::Channel::Base)

  • Use LiteCable.broadcast to broadcast messages (instead of ActionCable.server.broadcast)

  • Explicitly specify channels names:

class MyChannel < LiteCable::Channel::Base
  # Use this id in your client to create subscriptions
  identifier :chat
App.cable.subscriptions.create('chat', ...)

Using built-in server (middleware)

Lite Cable comes with a simple Rack middleware for development/testing usage. To use Lite Cable server:

  • Add gem "websocket" to your Gemfile

  • Add require "lite_cable/server"

  • Add LiteCable::Server::Middleware to your Rack stack, for example: do
  map "/cable" do
    # You have to specify your app's connection class
    use LiteCable::Server::Middleware, connection_class: App::Connection
    run proc { |_| [200, {"Content-Type" => "text/plain"}, ["OK"]] }

Using with AnyCable

Lite Cable is AnyCable-compatible out-of-the-box:

  • Set broadcast adapter to AnyCable:
LiteCable.broadcast_adapter = :any_cable

You can also do this via configuration, e.g., env var (LITECABLE_BROADCAST_ADAPTER=any_cable) or broadcast_adapter: any_cable in a YAML config.

  • Configure connection factory:
AnyCable.connection_factory = MyApp::Connection

Then run AnyCable along with the app:

bundle exec anycable

# add -r option to load the app if it's not ./config/anycable.rb or ./config/environment.rb
bundle exec anycable -r ./my_app.rb

See Sinatra example for more.


Lite Cable uses anyway_config for configuration.

See config for available options.

Unsupported features

  • Channel callbacks (after_subscribe, etc)

  • Stream callbacks (stream_from "xyz" { |msg| ... })

  • Periodical timers

  • Remote connections.


Bug reports and pull requests are welcome on GitHub at


The gem is available as open source under the terms of the MIT License.

You can’t perform that action at this time.