56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
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import asyncio
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from weakref import WeakSet
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from aiohttp.web import Application, AppRunner, WebSocketResponse, TCPSite
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from aiohttp.http_websocket import WSMsgType, WSCloseCode
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class AdminWebSocket:
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def __init__(self, manager):
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self.manager = manager
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self.app = Application()
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self.app['websockets'] = WeakSet()
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self.app.router.add_get('/', self.on_connect)
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self.app.on_shutdown.append(self.on_shutdown)
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self.runner = AppRunner(self.app)
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async def on_status(self, _):
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if not self.app['websockets']:
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return
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self.send_message({
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'type': 'status',
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'height': self.manager.daemon.cached_height(),
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})
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def send_message(self, msg):
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for web_socket in self.app['websockets']:
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asyncio.create_task(web_socket.send_json(msg))
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async def start(self):
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await self.runner.setup()
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await TCPSite(self.runner, self.manager.env.websocket_host, self.manager.env.websocket_port).start()
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async def stop(self):
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await self.runner.cleanup()
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async def on_connect(self, request):
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web_socket = WebSocketResponse()
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await web_socket.prepare(request)
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self.app['websockets'].add(web_socket)
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try:
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async for msg in web_socket:
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if msg.type == WSMsgType.TEXT:
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await self.on_status(None)
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elif msg.type == WSMsgType.ERROR:
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print('web socket connection closed with exception %s' %
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web_socket.exception())
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finally:
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self.app['websockets'].discard(web_socket)
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return web_socket
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@staticmethod
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async def on_shutdown(app):
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for web_socket in set(app['websockets']):
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await web_socket.close(code=WSCloseCode.GOING_AWAY, message='Server shutdown')
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