154 lines
8.7 KiB
Plaintext
154 lines
8.7 KiB
Plaintext
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{
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"metadata": {
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.9.5"
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},
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"orig_nbformat": 2,
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"kernelspec": {
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"name": "python395jvsc74a57bd0916dbcbb3f70747c44a77c7bcd40155683ae19c65e1c03b4aa3499c5328201f1",
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"display_name": "Python 3.9.5 64-bit"
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},
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"metadata": {
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"interpreter": {
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"hash": "916dbcbb3f70747c44a77c7bcd40155683ae19c65e1c03b4aa3499c5328201f1"
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}
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2,
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 1,
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"metadata": {},
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"outputs": [],
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"source": [
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"import websockets\n",
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"import asyncio\n",
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"import json\n",
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"import logging"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"metadata": {},
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"outputs": [],
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"source": [
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"class JsonWebsocketConnection(object):\n",
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"\n",
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" def __init__(self,\n",
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" websocket: websockets.WebSocketServerProtocol):\n",
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" \n",
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" logging.debug(\"incoming connection\")\n",
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" self._websocket = websocket\n",
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" self._is_closed = False;\n",
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" \n",
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" def is_closed(self):\n",
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" return self.is_closed\n",
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" \n",
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" async def close(self):\n",
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" logging.debug(\"closing connection\")\n",
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" try:\n",
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" if self._is_closed:\n",
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" return\n",
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" self._websocket.close()\n",
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" self._is_closed = True\n",
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" except Exception as e:\n",
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" logging.warning(\"error closing connection: %s\", str(e))\n",
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" \n",
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" async def send(self, message: dict):\n",
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" string_message = json.dumps(message)\n",
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" logging.debug(\"sending message: %s\", string_message)\n",
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" try:\n",
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" await self._websocket.send(string_message)\n",
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" except Exception as e:\n",
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" logging.warning(\"error sending message: %s\", str(e))\n",
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" \n",
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" async def handle_message(self, message: dict):\n",
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" pass # override this function\n",
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"\n",
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" async def run(self):\n",
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" try:\n",
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" async for message in self._websocket:\n",
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" try:\n",
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" json_message = json.loads(message)\n",
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" except ValueError as e:\n",
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" logging.warning(\"received unprocessable message %s\", str(e))\n",
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" await self.handle_message(message) \n",
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" \n",
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" except Exception as e:\n",
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" logging.warning(\"error in websocket connection: %s\", str(e))\n",
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"\n",
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"\n",
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"\n",
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"class JsonWebsocketServer(object):\n",
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" def __init__(self, handler_class: JsonWebsocketConnection, host:str = 'localhost', port:int = 8765):\n",
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" self._host = host\n",
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" self._port = port\n",
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" self._handler_class = handler_class\n",
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"\n",
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" def run(self):\n",
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" async def main(websocket: websockets.WebSocketServerProtocol,\n",
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" path: str):\n",
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"\n",
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" connection = self._handler_class(websocket)\n",
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"\n",
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" connection.run()\n",
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" \n",
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" start_server = websockets.serve(main, self._host, self._port)\n",
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"\n",
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" asyncio.get_event_loop().run_until_complete(start_server)\n",
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" asyncio.get_event_loop().run_forever()\n",
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" \n",
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"\n",
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"def CrosswordConnection(JsonWebsocketConnection): \n",
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" async def handle_message(self, message: dict):\n",
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" await self.send({\"message\": \"hello\"})\n",
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" \n",
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"\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {},
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"outputs": [
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{
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"output_type": "error",
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"ename": "RuntimeError",
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"evalue": "This event loop is already running",
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"traceback": [
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"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
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"\u001b[0;31mRuntimeError\u001b[0m Traceback (most recent call last)",
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"\u001b[0;32m<ipython-input-3-ecab008e957f>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m 1\u001b[0m \u001b[0mserver\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mJsonWebsocketServer\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mCrosswordConnection\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m \u001b[0mserver\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mrun\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
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"\u001b[0;32m<ipython-input-2-3c372b72dd90>\u001b[0m in \u001b[0;36mrun\u001b[0;34m(self)\u001b[0m\n\u001b[1;32m 62\u001b[0m \u001b[0mstart_server\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mwebsockets\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mserve\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mmain\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_host\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_port\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 63\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m---> 64\u001b[0;31m \u001b[0masyncio\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget_event_loop\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mrun_until_complete\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mstart_server\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 65\u001b[0m \u001b[0masyncio\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget_event_loop\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mrun_forever\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 66\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
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"\u001b[0;32m/usr/lib/python3.9/asyncio/base_events.py\u001b[0m in \u001b[0;36mrun_until_complete\u001b[0;34m(self, future)\u001b[0m\n\u001b[1;32m 616\u001b[0m \"\"\"\n\u001b[1;32m 617\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_check_closed\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 618\u001b[0;31m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_check_running\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 619\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 620\u001b[0m \u001b[0mnew_task\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;32mnot\u001b[0m \u001b[0mfutures\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0misfuture\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfuture\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
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"\u001b[0;32m/usr/lib/python3.9/asyncio/base_events.py\u001b[0m in \u001b[0;36m_check_running\u001b[0;34m(self)\u001b[0m\n\u001b[1;32m 576\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0m_check_running\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 577\u001b[0m \u001b[0;32mif\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mis_running\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 578\u001b[0;31m \u001b[0;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'This event loop is already running'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 579\u001b[0m \u001b[0;32mif\u001b[0m \u001b[0mevents\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_get_running_loop\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m \u001b[0;32mis\u001b[0m \u001b[0;32mnot\u001b[0m \u001b[0;32mNone\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 580\u001b[0m raise RuntimeError(\n",
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"\u001b[0;31mRuntimeError\u001b[0m: This event loop is already running"
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]
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}
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],
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"source": [
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"server = JsonWebsocketServer(CrosswordConnection)\n",
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"server.run()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": []
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}
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]
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}
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