baseimage-tutorial-framework/tfw/internals/server/zmq_websocket_router.py

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import json
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import logging
from tornado.websocket import WebSocketHandler
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from .tfw_router import TFWRouter
LOG = logging.getLogger(__name__)
class ZMQWebSocketRouter(WebSocketHandler):
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# pylint: disable=abstract-method,attribute-defined-outside-init
instances = set()
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def initialize(self, **kwargs):
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self.event_handler_connector = kwargs['event_handler_connector']
self.tfw_router = TFWRouter(self.send_to_zmq, self.send_to_websockets)
def send_to_zmq(self, message):
self.event_handler_connector.send_message(message)
@classmethod
def send_to_websockets(cls, message):
for instance in cls.instances:
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instance.write_message(message)
def prepare(self):
type(self).instances.add(self)
def on_close(self):
type(self).instances.remove(self)
def open(self, *args, **kwargs):
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LOG.debug('WebSocket connection initiated!')
self.event_handler_connector.register_callback(self.zmq_callback)
def zmq_callback(self, message):
LOG.debug('Received on ZMQ pull socket: %s', message)
self.tfw_router.route(message)
def on_message(self, message):
message = json.loads(message)
LOG.debug('Received on WebSocket: %s', message)
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self.tfw_router.route(message)
# much secure, very cors, wow
def check_origin(self, origin):
return True