240 lines
8.3 KiB
Python
240 lines
8.3 KiB
Python
from fastapi import APIRouter, FastAPI, Response, WebSocket, WebSocketDisconnect
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from fastapi.responses import HTMLResponse
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from pydantic import BaseModel, EmailStr, Field
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from typing import Dict, List, Optional, Set, Union
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import aioredis, asyncio, datetime, hashlib, json, os, pathlib, shutil, time
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from app.lib_general import log, logging, common_route_params, Common_Route_Params, common_route_params_min, Common_Route_Params_Min
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from app.config import settings
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from app.db_sql import sql_insert, sql_update, sql_insert_or_update, sql_select, sql_delete, redis_lookup_id_random
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router = APIRouter()
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html = """
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<!DOCTYPE html>
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<html>
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<head>
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<title>Chat</title>
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</head>
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<body>
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<h1>WebSocket Chat</h1>
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<h2>Your ID: <span id="ws-id"></span></h2>
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<form action="" onsubmit="sendMessage(event)">
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<input type="text" id="messageText" autocomplete="off"/>
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<button>Send</button>
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</form>
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<ul id='messages'>
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</ul>
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<script>
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var client_id = Date.now();
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document.querySelector("#ws-id").textContent = client_id;
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var ws = new WebSocket(`ws://localhost:5005/ws/${client_id}`);
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// var ws = new WebSocket("ws://localhost:8000/ws");
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// var ws = new WebSocket("ws://fastapi.localhost/ws");
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ws.onmessage = function(event) {
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var messages = document.getElementById('messages');
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var message = document.createElement('li');
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var content = document.createTextNode(event.data);
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message.appendChild(content);
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messages.appendChild(message);
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};
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function sendMessage(event) {
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console.log('*** sendMessage() ***');
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var input = document.getElementById("messageText");
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var data = { 'client_id': client_id, 'message': input.value };
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var data_json_str = JSON.stringify(data);
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ws.send(data_json_str);
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input.value = '';
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event.preventDefault();
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}
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</script>
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</body>
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</html>
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"""
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@router.get("/ws_test")
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async def get(response: Response = Response):
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log.setLevel(logging.DEBUG)
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log.debug(locals())
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return HTMLResponse(html)
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class ConnectionManager:
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def __init__(self):
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self.active_connections: List[WebSocket] = []
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async def connect(self, websocket: WebSocket):
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await websocket.accept()
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self.active_connections.append(websocket)
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log.debug(self.active_connections)
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def disconnect(self, websocket: WebSocket):
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self.active_connections.remove(websocket)
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async def send_personal_message(self, message: str, websocket: WebSocket):
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log.setLevel(logging.DEBUG)
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# log.debug(dir(websocket))
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log.debug(vars(websocket))
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log.debug(websocket.url)
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log.debug(websocket.client)
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log.debug(websocket.client_state)
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log.debug(websocket.headers['sec-websocket-key'])
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await websocket.send_text(message)
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async def broadcast(self, message: str):
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log.setLevel(logging.DEBUG)
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for connection in self.active_connections:
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log.debug(connection)
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await connection.send_text(message)
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manager = ConnectionManager()
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@router.websocket('/ws/room/{room_id}')
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async def ws_room_id(
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websocket: WebSocket,
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room_id: str,
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):
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await manager.connect(websocket)
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await manager.broadcast(f'Welcome to room "{room_id}"!')
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try:
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while True:
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data = await websocket.receive_json()
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log.debug(data)
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data_dict = data
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# data_dict = json.loads(data)
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log.debug(data_dict['client_id'])
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client_id = data_dict['client_id']
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await manager.send_personal_message(f'You wrote: {data}', websocket)
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await manager.broadcast(f'Client #{client_id} says: {data}')
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except WebSocketDisconnect:
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manager.disconnect(websocket)
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await manager.broadcast(f'Client #{client_id} left the chat')
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# NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING
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# time.sleep(3.5) # NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING
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# NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING
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@router.websocket('/ws/looping')
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async def ws_looping(
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websocket: WebSocket,
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):
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await manager.connect(websocket)
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# await manager.broadcast(f'Welcome to looping')
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try:
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while True:
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# NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING
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# await time.sleep(3.5) # NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING
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# NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING NOTE: WARNING
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# data = await websocket.receive_json()
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# log.debug(data)
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# data_dict = data
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# data_dict = json.loads(data)
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# log.debug(data_dict['client_id'])
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# await manager.send_personal_message(f'You wrote: {data}', websocket)
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await manager.broadcast(f'Loop!!!')
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except WebSocketDisconnect:
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manager.disconnect(websocket)
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await manager.broadcast(f'Client left')
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@router.websocket('/ws/{client_id}')
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async def ws_client_id(
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websocket: WebSocket,
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client_id: int,
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):
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await manager.connect(websocket)
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try:
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while True:
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data = await websocket.receive_json()
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log.debug(data)
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data_dict = data
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# data_dict = json.loads(data)
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log.debug(data_dict['client_id'])
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await manager.send_personal_message(f'You wrote: {data}', websocket)
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await manager.broadcast(f'Client #{client_id} says: {data}')
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except WebSocketDisconnect:
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manager.disconnect(websocket)
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await manager.broadcast(f'Client #{client_id} left the chat')
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# @router.websocket("/ws/{client_id}")
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# async def websocket_endpoint(
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# websocket: WebSocket,
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# client_id: int,
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# response: Response = Response,
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# ):
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# log.setLevel(logging.DEBUG)
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# log.debug(locals())
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# log.info('Root of ws. Waiting to accept a websocket and then the redis_connector')
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# await websocket.accept()
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# await redis_connector(websocket)
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async def redis_connector(
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websocket: WebSocket,
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redis_url: str = "redis://localhost:6379",
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):
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log.setLevel(logging.DEBUG)
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log.debug(locals())
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async def consumer_handler(ws: WebSocket, r):
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try:
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while True:
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message = await ws.receive_text()
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if message:
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#logging.info(ws)
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#logging.info(dir(message))
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data = json.loads(message)
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#await r.publish("chat:c", message)
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#await r.publish("chat:c", str(data['message']))
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await r.publish("chat:c", str(data['client_id']))
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await r.publish("chat:c", str(data))
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except WebSocketDisconnect as exc:
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# TODO this needs handling better
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log.error(exc)
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async def producer_handler(r, ws: WebSocket):
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(channel,) = await r.subscribe("chat:c")
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assert isinstance(channel, aioredis.Channel)
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try:
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while True:
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message = await channel.get()
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if message:
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await ws.send_text(message.decode("utf-8"))
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except Exception as exc:
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# TODO this needs handling better
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log.error(exc)
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# redis = await aioredis.create_pool(redis_url)
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# Redis client bound to pool of connections (auto-reconnecting).
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redis = aioredis.from_url(
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redis_url, encoding="utf-8", decode_responses=True
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)
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consumer_task = consumer_handler(websocket, redis)
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producer_task = producer_handler(redis, websocket)
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done, pending = await asyncio.wait(
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[consumer_task, producer_task], return_when=asyncio.FIRST_COMPLETED,
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)
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log.debug(f"Done task: {done}")
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for task in pending:
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log.debug(f"Canceling task: {task}")
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task.cancel()
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await redis.close()
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# await redis.wait_closed()
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