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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)
@processor = ActionCable::Connection::Processor.new(self)
end
def process
logger.info started_request_message
if websocket?
@websocket = Faye::WebSocket.new(@env)
@websocket.on(:open) do |event|
heartbeat.start
send_async :on_open
end
@websocket.on(:message) do |event|
processor.handle event.data
end
@websocket.on(:close) do |event|
logger.info finished_request_message
heartbeat.stop
send_async :on_close
end
@websocket.rack_response
else
logger.info finished_request_message
respond_to_invalid_request
end
end
def receive(data_in_json)
if websocket_alive?
data = ActiveSupport::JSON.decode data_in_json
case data['command']
when 'subscribe' then subscriptions.add data
when 'unsubscribe' then subscriptions.remove data
when 'message' then process_message data
else
logger.error "Received unrecognized command in #{data.inspect}"
end
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 :heartbeat, :subscriptions, :processor
def on_open
server.add_connection(self)
connect if respond_to?(:connect)
subscribe_to_internal_channel
processor.ready!
end
def on_close
server.remove_connection(self)
subscriptions.cleanup
unsubscribe_from_internal_channel
disconnect if respond_to?(:disconnect)
end
def process_message(message)
subscriptions.find(message['identifier']).perform_action(ActiveSupport::JSON.decode(message['data']))
rescue Exception => e
logger.error "Could not process message (#{message.inspect})"
log_exception(e)
end
def respond_to_invalid_request
[ 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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