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import logging |
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from typing import List |
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from aiohttp import WSCloseCode, web |
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websockets = web.AppKey("websockets", List[web.WebSocketResponse]) |
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async def wshandler(request: web.Request) -> web.WebSocketResponse: |
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ws = web.WebSocketResponse(autoclose=False) |
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is_ws = ws.can_prepare(request) |
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if not is_ws: |
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raise web.HTTPBadRequest() |
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await ws.prepare(request) |
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request.app[websockets].append(ws) |
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while True: |
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msg = await ws.receive() |
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if msg.type == web.WSMsgType.TEXT: |
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await ws.send_str(msg.data) |
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elif msg.type == web.WSMsgType.BINARY: |
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await ws.send_bytes(msg.data) |
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elif msg.type == web.WSMsgType.CLOSE: |
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await ws.close() |
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break |
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else: |
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break |
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return ws |
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async def on_shutdown(app: web.Application) -> None: |
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ws_list = app[websockets] |
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for ws in set(ws_list): |
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await ws.close(code=WSCloseCode.GOING_AWAY, message=b"Server shutdown") |
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if __name__ == "__main__": |
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logging.basicConfig( |
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level=logging.DEBUG, format="%(asctime)s %(levelname)s %(message)s" |
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) |
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app = web.Application() |
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l: List[web.WebSocketResponse] = [] |
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app[websockets] = l |
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app.router.add_route("GET", "/", wshandler) |
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app.on_shutdown.append(on_shutdown) |
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try: |
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web.run_app(app, port=9001) |
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except KeyboardInterrupt: |
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print("Server stopped at http://127.0.0.1:9001") |
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