rails/actioncable/CHANGELOG.md

• WebSocket protocol negotiation.

  Introduces an Action Cable protocol version that moves independently of and, hopefully, more slowly than Action Cable itself. Client sockets negotiate a protocol with the Cable server using WebSockets' native subprotocol support:

  • https://tools.ietf.org/html/rfc6455#section-1.9
  • https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#Subprotocols

  If they can't negotiate a compatible protocol (usually due to upgrading the Cable server with a browser still running old JavaScript) then the client knows to disconnect, cease retrying, and tell the app that it hit a protocol mismatch.

  This allows us to evolve the Action Cable message format, handshaking, pings, acknowledgements, and more without breaking older clients' expectations of server behavior.

  Daniel Rhodes

• Pubsub: automatic stream decoding.

  stream_for @room, coder: ActiveSupport::JSON do |message|
    # `message` is a Ruby hash here instead of a JSON string
  

  The coder must respond to #decode. Defaults to coder: nil which skips decoding entirely.

  Jeremy Daer

• Add ActiveSupport::Notifications to ActionCable::Channel.

  Matthew Wear

• Safely support autoloading and class unloading, by preventing concurrent loads, and disconnecting all cables during reload.

  Matthew Draper

• Ensure ActionCable behaves correctly for non-string queue names.

  Jay Hayes

Rails 5.0.0.beta3 (February 24, 2016)

• Added em_redis_connector and redis_connector to ActionCable::SubscriptionAdapter::EventedRedis and added redis_connector to ActionCable::SubscriptionAdapter::Redis, so you can overwrite with your own initializers. This is used when you want to use different-than-standard Redis adapters, like for Makara distributed Redis.

  DHH

Rails 5.0.0.beta2 (February 01, 2016)

• Support PostgreSQL pubsub adapter.

  Jon Moss

• Remove EventMachine dependency.

  Matthew Draper

• Remove Celluloid dependency.

  Mike Perham

• Create notion of an ActionCable::SubscriptionAdapter. Separate out Redis functionality into ActionCable::SubscriptionAdapter::Redis, and add a PostgreSQL adapter as well. Configuration file for ActionCable was changed fromconfig/redis/cable.yml to config/cable.yml.

  Jon Moss

Rails 5.0.0.beta1 (December 18, 2015)

• Added to Rails!

  DHH