50 lines
1.1 KiB
Python
50 lines
1.1 KiB
Python
import json
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import uuid
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import logging
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import asyncio
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import websockets
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from sanic import Blueprint
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bp = Blueprint(__name__)
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log = logging.getLogger(__name__)
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class OP:
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SUBSCRIBED = 1
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class ErrorCodes:
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TOO_MUCH = 4420
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@bp.websocket('/api/streaming')
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async def streaming_ws(request, ws):
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opening_msg = await ws.recv()
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if len(opening_msg) > 256:
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await ws.close(code=ErrorCodes.TOO_MUCH, reason='Too much data')
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return
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open_payload = json.loads(opening_msg)
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# subscribe the websocket to all channels it wants
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ws.client_id = uuid.uuid4()
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try:
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channels = open_payload['channels']
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subscribed = request.app.manager.subscribe(channels, ws)
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await ws.send(json.dumps({
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'op': OP.SUBSCRIBED,
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'channels': subscribed,
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}))
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# keep websocket alive
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while True:
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await ws.ping()
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await asyncio.sleep(1)
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except websockets.exceptions.ConnectionClosed as wc:
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log.warning(f'connection {ws.client_id} closed: {wc!r}')
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request.app.manager.unsub_all(ws)
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