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module ActionCable
module Connection
class Base
include Identification
include InternalChannel
include Authorization
attr_reader :server, :env
delegate :worker_pool, :pubsub, to: :server
attr_reader :logger
def initialize(server, env)
@server, @env = server, env
@logger = new_tagged_logger
@websocket = ActionCable::Connection::WebSocket.new(env)
@heartbeat = ActionCable::Connection::Heartbeat.new(self)
@subscriptions = ActionCable::Connection::Subscriptions.new(self)
@message_buffer = ActionCable::Connection::MessageBuffer.new(self)
@started_at = Time.now
end
def process
logger.info started_request_message
if websocket.possible?
websocket.on(:open) { |event| send_async :on_open }
websocket.on(:message) { |event| on_message event.data }
websocket.on(:close) { |event| send_async :on_close }
respond_to_successful_request
else
respond_to_invalid_request
end
end
def receive(data_in_json)
if websocket.alive?
subscriptions.execute_command ActiveSupport::JSON.decode(data_in_json)
else
logger.error "Received data without a live websocket (#{data.inspect})"
end
end
def transmit(data)
websocket.transmit data
end
def close
logger.error "Closing connection"
websocket.close
end
def send_async(method, *arguments)
worker_pool.async.invoke(self, method, *arguments)
end
def statistics
{ identifier: connection_identifier, started_at: @started_at, subscriptions: subscriptions.identifiers }
end
protected
def request
@request ||= ActionDispatch::Request.new(Rails.application.env_config.merge(env))
end
def cookies
request.cookie_jar
end
private
attr_reader :websocket
attr_reader :heartbeat, :subscriptions, :message_buffer
def on_open
server.add_connection(self)
connect if respond_to?(:connect)
subscribe_to_internal_channel
heartbeat.start
message_buffer.process!
rescue ActionCable::Connection::Authorization::UnauthorizedError
respond_to_invalid_request
close
end
def on_message(message)
message_buffer.append message
end
def on_close
logger.info finished_request_message
server.remove_connection(self)
subscriptions.cleanup
unsubscribe_from_internal_channel
heartbeat.stop
disconnect if respond_to?(:disconnect)
end
def respond_to_successful_request
websocket.rack_response
end
def respond_to_invalid_request
logger.info finished_request_message
[ 404, { 'Content-Type' => 'text/plain' }, [ 'Page not found' ] ]
end
# Tags are declared in the server but computed in the connection. This allows us per-connection tailored tags.
def new_tagged_logger
TaggedLoggerProxy.new server.logger,
tags: server.config.log_tags.map { |tag| tag.respond_to?(:call) ? tag.call(request) : tag.to_s.camelize }
end
def started_request_message
'Started %s "%s"%s for %s at %s' % [
request.request_method,
request.filtered_path,
websocket.possible? ? ' [Websocket]' : '',
request.ip,
Time.now.to_default_s ]
end
def finished_request_message
'Finished "%s"%s for %s at %s' % [
request.filtered_path,
websocket.possible? ? ' [Websocket]' : '',
request.ip,
Time.now.to_default_s ]
end
end
end
end
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