The request that
initiated the WebSocket connection is
available here. This gives access to the environment, cookies, etc.
# File actioncable/lib/action_cable/connection/base.rb, line 145
def request # :doc:
@request ||= begin
environment = Rails.application.env_config.merge(env) if defined?(Rails.application) && Rails.application
ActionDispatch::Request.new(environment || env)
end
end