mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-09-16 23:54:09 +00:00
61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
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import logging
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import json
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from tornado.websocket import WebSocketHandler
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import zmq
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from zmq.eventloop.zmqstream import ZMQStream
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from zmq.eventloop import ioloop
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from config import PUBLISHER_PORT, RECEIVER_PORT
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from buttons import Buttons
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ioloop.install()
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class ZMQWebSocketHandler(WebSocketHandler):
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def __init__(self, application, request, zmq_context=None, **kwargs):
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super().__init__(application, request, **kwargs)
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self.zmq_context = zmq_context or zmq.Context.instance()
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self.zmq_pull_socket = self.zmq_context.socket(zmq.PULL)
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self.zmq_pull_stream = ZMQStream(self.zmq_pull_socket)
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self.zmq_pub_socket = self.zmq_context.socket(zmq.PUB)
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self.fsm = Buttons(self)
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def open(self, *args, **kwargs):
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pub_socket_address = 'tcp://*:{}'.format(PUBLISHER_PORT)
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self.zmq_pub_socket.bind(pub_socket_address)
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logging.debug('Pub socket bound to {}'.format(pub_socket_address))
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pull_socket_address = 'tcp://*:{}'.format(RECEIVER_PORT)
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self.zmq_pull_socket.bind(pull_socket_address)
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logging.debug('Pull socket bound to {}'.format(pull_socket_address))
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def zmq_callback(msg_parts):
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anchor, data = msg_parts
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logging.debug('Received on pull socket: {}'.format(data.decode()))
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self.write_message(data.decode())
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self.zmq_pull_stream.on_recv(zmq_callback)
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def on_message(self, message):
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logging.debug('Received on WebSocket: {}'.format(message))
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self.fsm.trigger(self._parse_anchor(message), message=message)
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def send_message(self, message, anchor: str = None):
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if not anchor:
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anchor = self._parse_anchor(message)
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encoded_message = [part.encode('utf-8') for part in (anchor, message)]
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self.zmq_pub_socket.send_multipart(encoded_message)
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def on_close(self):
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self.zmq_pull_socket.close()
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self.zmq_pub_socket.close()
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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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@staticmethod
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def _parse_anchor(message):
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message_json = json.loads(message)
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return message_json['anchor']
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