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module ActionCable
module Connection
class Base
include Identification
include InternalChannel
attr_reader :server, :env
delegate :worker_pool, :pubsub, to: :server
attr_reader :logger
def initialize(server, env)
@started_at = Time.now
@server, @env = server, env
@logger = TaggedLoggerProxy.new(server.logger, tags: log_tags)
@heartbeat = ActionCable::Connection::Heartbeat.new(self)
@subscriptions = ActionCable::Connection::Subscriptions.new(self)
@message_buffer = ActionCable::Connection::MessageBuffer.new(self)
end
def process
logger.info started_request_message
if websocket?
@websocket = Faye::WebSocket.new(@env)
websocket.on(:open) { |event| send_async :on_open }
websocket.on(:message) { |event| on_message event.data }
websocket.on(:close) { |event| send_async :on_close }
websocket.rack_response
else
respond_to_invalid_request
end
end
def receive(data_in_json)
if websocket_alive?
execute_command decode_json(data_in_json)
else
logger.error "Received data without a live websocket (#{data.inspect})"
end
end
def transmit(data)
websocket.send 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!
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 execute_command(data)
case data['command']
when 'subscribe' then subscriptions.add data
when 'unsubscribe' then subscriptions.remove data
when 'message' then subscriptions.find(message['identifier']).perform_action decode_json(message['data'])
else
logger.error "Received unrecognized command in #{data.inspect}"
end
rescue Exception => e
logger.error "Could not execute command from #{data.inspect})"
log_exception(e)
end
def decode_json(json)
ActiveSupport::JSON.decode json
end
def respond_to_invalid_request
logger.info finished_request_message
[ 404, { 'Content-Type' => 'text/plain' }, [ 'Page not found' ] ]
end
def websocket_alive?
websocket && websocket.ready_state == Faye::WebSocket::API::OPEN
end
def websocket?
@is_websocket ||= Faye::WebSocket.websocket?(@env)
end
def started_request_message
'Started %s "%s"%s for %s at %s' % [
request.request_method,
request.filtered_path,
websocket? ? ' [Websocket]' : '',
request.ip,
Time.now.to_default_s ]
end
def finished_request_message
'Finished "%s"%s for %s at %s' % [
request.filtered_path,
websocket? ? ' [Websocket]' : '',
request.ip,
Time.now.to_default_s ]
end
def log_exception(e)
logger.error "There was an exception: #{e.class} - #{e.message}"
logger.error e.backtrace.join("\n")
end
def log_tags
server.log_tags.map { |tag| tag.respond_to?(:call) ? tag.call(request) : tag.to_s.camelize }
end
end
end
end
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