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