2018-04-03 12:49:14 +00:00
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# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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2018-01-26 14:15:05 +00:00
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import json
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2018-03-27 15:49:32 +00:00
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from abc import ABC, abstractmethod
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2018-03-25 13:43:59 +00:00
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2017-11-17 14:47:22 +00:00
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from tornado.websocket import WebSocketHandler
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2018-04-06 13:21:45 +00:00
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from tfw.networking import deserialize_all
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2018-02-06 13:19:41 +00:00
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from tfw.config.logs import logging
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2018-03-25 14:06:59 +00:00
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LOG = logging.getLogger(__name__)
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2018-01-29 16:24:17 +00:00
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2017-11-17 14:47:22 +00:00
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2018-03-27 15:49:32 +00:00
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class ZMQWebSocketHandler(WebSocketHandler, ABC):
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2018-02-16 16:47:30 +00:00
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instances = set()
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2018-04-06 14:52:23 +00:00
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def initialize(self, **kwargs): # pylint: disable=arguments-differ
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2018-04-06 14:04:25 +00:00
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self._event_handler_connector = kwargs['event_handler_connector']
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2018-02-16 16:47:30 +00:00
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def prepare(self):
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ZMQWebSocketHandler.instances.add(self)
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def on_close(self):
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ZMQWebSocketHandler.instances.remove(self)
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2018-02-05 13:23:46 +00:00
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2017-11-17 14:47:22 +00:00
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def open(self, *args, **kwargs):
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2018-03-25 14:06:59 +00:00
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LOG.debug('WebSocket connection initiated')
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2018-01-29 16:24:17 +00:00
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self._event_handler_connector.register_callback(self.zmq_callback)
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2017-12-20 10:34:21 +00:00
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2018-04-06 14:04:25 +00:00
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def zmq_callback(self, msg_parts):
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keyhandlers = {'mirror': self.mirror}
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2018-03-14 13:08:48 +00:00
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2018-04-11 13:22:54 +00:00
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key, message = deserialize_all(*msg_parts)
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LOG.debug('Received on pull socket: %s', message)
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self.handle_trigger(message)
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2018-03-14 13:08:48 +00:00
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if key not in keyhandlers:
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2018-04-06 14:04:25 +00:00
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for instance in ZMQWebSocketHandler.instances:
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2018-04-11 13:22:54 +00:00
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instance.write_message(message)
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2018-03-14 13:08:48 +00:00
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else:
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2018-03-30 15:50:20 +00:00
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try:
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2018-04-11 13:22:54 +00:00
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keyhandlers[key](message['data'])
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2018-03-30 15:50:20 +00:00
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except KeyError:
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LOG.error('Invalid mirror message format! Ignoring.')
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2018-03-14 13:08:48 +00:00
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2018-04-06 14:04:25 +00:00
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def mirror(self, data):
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2018-03-14 13:08:48 +00:00
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key = data['key']
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2018-04-06 14:04:25 +00:00
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self._event_handler_connector.send_message({'data': data}, key)
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2017-11-17 14:47:22 +00:00
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def on_message(self, message):
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2018-03-25 14:25:01 +00:00
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LOG.debug('Received on WebSocket: %s', message)
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2018-04-13 14:16:51 +00:00
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self.send_message(self.make_eventhandler_response(message))
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2018-01-29 13:09:40 +00:00
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2018-03-27 15:49:32 +00:00
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@abstractmethod
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2018-04-13 14:16:51 +00:00
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def make_eventhandler_response(self, message):
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2018-02-21 15:46:25 +00:00
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raise NotImplementedError
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2018-02-21 14:28:16 +00:00
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def send_message(self, message: dict, key: str = None):
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self._event_handler_connector.send_message(message, key)
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2017-11-17 14:47:22 +00:00
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2018-04-11 13:22:54 +00:00
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@abstractmethod
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def handle_trigger(self, message):
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raise NotImplementedError
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2017-11-17 14:47:22 +00:00
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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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2018-01-29 13:09:40 +00:00
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2018-02-23 11:07:30 +00:00
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class ZMQWebSocketProxy(ZMQWebSocketHandler):
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2018-03-30 16:11:38 +00:00
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# pylint: disable=abstract-method
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2018-04-06 14:52:23 +00:00
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def initialize(self, **kwargs): # pylint: disable=arguments-differ
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2018-04-06 14:04:25 +00:00
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super(ZMQWebSocketProxy, self).initialize(**kwargs)
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2018-04-13 14:16:51 +00:00
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self._make_eventhandler_response = kwargs['make_eventhandler_response']
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2018-04-06 14:04:25 +00:00
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self._proxy_filter = kwargs['proxy_filter']
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2018-04-11 13:22:54 +00:00
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self._handle_trigger = kwargs['handle_trigger']
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2018-01-29 16:24:17 +00:00
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2018-02-23 11:07:30 +00:00
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def on_message(self, message):
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message = json.loads(message)
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if self._proxy_filter(message):
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super().on_message(message)
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2018-01-29 13:09:40 +00:00
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2018-04-13 14:16:51 +00:00
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def make_eventhandler_response(self, message):
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return self._make_eventhandler_response(message)
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2018-04-11 13:22:54 +00:00
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def handle_trigger(self, message):
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self._handle_trigger(message)
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