71 lines
2.2 KiB
Python
71 lines
2.2 KiB
Python
# Copyright 2017 Mycroft AI Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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"""Define the web socket event handler for the message bus."""
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import json
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import sys
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import traceback
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from tornado.websocket import WebSocketHandler
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from pyee import EventEmitter
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from mycroft.messagebus.message import Message
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from mycroft.util.log import LOG
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client_connections = []
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class MessageBusEventHandler(WebSocketHandler):
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def __init__(self, application, request, **kwargs):
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super().__init__(application, request, **kwargs)
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self.emitter = EventEmitter()
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def on(self, event_name, handler):
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self.emitter.on(event_name, handler)
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def on_message(self, message):
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LOG.debug(message)
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try:
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deserialized_message = Message.deserialize(message)
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except Exception:
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return
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try:
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self.emitter.emit(deserialized_message.msg_type,
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deserialized_message)
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except Exception as e:
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LOG.exception(e)
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traceback.print_exc(file=sys.stdout)
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pass
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for client in client_connections:
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client.write_message(message)
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def open(self):
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self.write_message(Message("connected").serialize())
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client_connections.append(self)
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def on_close(self):
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client_connections.remove(self)
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def emit(self, channel_message):
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if (hasattr(channel_message, 'serialize') and
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callable(getattr(channel_message, 'serialize'))):
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self.write_message(channel_message.serialize())
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else:
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self.write_message(json.dumps(channel_message))
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def check_origin(self, origin):
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return True
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