rails/actioncable/CHANGELOG.md

• Add a @server instance variable referencing the ActionCable.server singleton to ActionCable::Channel::ConnectionStub

  This lets us delegate the pubsub and config method calls to the server. This fixes NoMethodError errors when testing channel logic that call pubsub (e.g. stop_stream_for).

  Julian Foo

• Added health_check_path and health_check_application config to mount a given health check rack app on a given path. Useful when mounting Action Cable standalone.

  Joé Dupuis

• assert_broadcasts now returns the messages that were broadcast.

  This makes it easier to do further analysis on those messages:

  message = assert_broadcasts("test", 1) do
    ActionCable.server.broadcast "test", "message"
  end
  assert_equal "message", message
  
  messages = assert_broadcasts("test", 2) do
    ActionCable.server.broadcast "test", { message: "one" }
    ActionCable.server.broadcast "test", { message: "two" }
  end
  assert_equal 2, messages.length
  assert_equal({ "message" => "one" }, messages.first)
  assert_equal({ "message" => "two" }, messages.last)
  

  Alex Ghiculescu

• Display broadcasted messages on error message when using assert_broadcast_on

  Stéphane Robino

• The Action Cable client now supports subprotocols to allow passing arbitrary data to the server.

  const consumer = ActionCable.createConsumer()
  
  consumer.addSubProtocol('custom-protocol')
  
  consumer.connect()
  

  See also:

  • https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#subprotocols

  Guillaume Hain

• Redis pub/sub adapter now automatically reconnects when Redis connection is lost.

  Vladimir Dementyev

• The connected() callback can now take a {reconnected} parameter to differentiate connections from reconnections.

  import consumer from "./consumer"
  
  consumer.subscriptions.create("ExampleChannel", {
    connected({reconnected}) {
      if (reconnected) {
        ...
      } else {
        ...
      }
    }
  })
  

  Mansa Keïta

• The Redis adapter is now compatible with redis-rb 5.0

  Compatibility with redis-rb 3.x was dropped.

  Jean Boussier

• The Action Cable server is now mounted with anchor: true.

  This means that routes that also start with /cable will no longer clash with Action Cable.

  Alex Ghiculescu

• ActionCable.server.remote_connections.where(...).disconnect now sends disconnect message before closing the connection with the reconnection strategy specified (defaults to true).

  Vladimir Dementyev

• Added command callbacks to ActionCable::Connection::Base.

  Now you can define before_command, after_command, and around_command to be invoked before, after or around any command received by a client respectively.

  Vladimir Dementyev

Please check 7-0-stable for previous changes.