baseimage-tutorial-framework/src/app/handlers/zmq_websocket_handler.py

import logging

from tornado.websocket import WebSocketHandler

from buttons import Buttons
from util import parse_anchor_from_message

import component_connector


class ZMQWebSocketHandler(WebSocketHandler):
    def __init__(self, application, request, **kwargs):
        super().__init__(application, request, **kwargs)
        self.fsm = Buttons(self)

    def open(self, *args, **kwargs):
        def zmq_callback(msg_parts):
            anchor, data = msg_parts
            logging.debug('Received on pull socket: {}'.format(data.decode()))
            self.write_message(data.decode())

        component_connector.register_callback(zmq_callback)

    def on_message(self, message):
        logging.debug('Received on WebSocket: {}'.format(message))
        self.fsm.trigger(self._parse_anchor(message), message=message)

    def send_message(self, message: str, anchor: str = None):
        component_connector.send_message(message, anchor)

    def on_close(self):
        pass

    # much secure, very cors, wow
    def check_origin(self, origin):
        return True