Fastapi框架Websocket官方示例: https://fastapi.tiangolo.com/advanced/websockets/ 中有一个示例实现多个用户进行即时沟通，但这个示例只能实现多个用户在一起沟通，而不能实现多个用户随便分组随便沟通，因此对这个示例进行了修改实现了多房间多用户的沟通场景。修改的部分以及修改后的代码如下：本文地址:http://www.04007.cn/article/979.html,未经许可,不得转载.
from typing import List
from fastapi import FastAPI, WebSocket, WebSocketDisconnect
from fastapi.responses import HTMLResponse
app = FastAPI()
html = """
<!DOCTYPE html>
<html>
<head>
<title>Chat</title>
</head>
<body>
<h1>WebSocket Chat</h1>
<h2>Your ID: <span id="ws-id"></span></h2>
#添加了room_id参数
<h2>Room ID: <span id="room_id"></span></h2>
<form action="" onsubmit="sendMessage(event)">
<input type="text" id="messageText" autocomplete="off"/>
<button>Send</button>
</form>
<ul id='messages'>
</ul>
<script>
var client_id = Date.now()
document.querySelector("#ws-id").textContent = client_id;
#随机生成room_id值，当前先分成3个房间，并显示在页面上以方便查看自己当前进入的房间。
var room_id = "room" + Math.floor(Math.random() * 10) % 3;
document.querySelector("#room_id").textContent = room_id;
#连接协议就需要改成添加room_id参数的URL了
#var ws = new WebSocket(`ws://127.0.0.1:8000/ws/${client_id}`);
var ws = new WebSocket(`ws://127.0.0.1:8010/ws/${room_id}/${client_id}`);
ws.onmessage = function(event) {
var messages = document.getElementById('messages')
var message = document.createElement('li')
var content = document.createTextNode(event.data)
message.appendChild(content)
messages.appendChild(message)
};
function sendMessage(event) {
var input = document.getElementById("messageText")
ws.send(input.value)
input.value = ''
event.preventDefault()
}
</script>
</body>
</html>
"""
class ConnectionManager:
def __init__(self):
self.active_connections: Dict = {}
async def connect(self, room_id:str, websocket: WebSocket):
await websocket.accept()
if room_id in self.active_connections:
self.active_connections[room_id].append(websocket)
else:
self.active_connections[room_id] = []
self.active_connections[room_id].append(websocket)
def disconnect(self, room_id:str, websocket: WebSocket):
self.active_connections[room_id].remove(websocket)
async def send_personal_message(self, message: str, room_id:str, websocket: WebSocket):
await websocket.send_text(message)
async def broadcast(self, message: str, room_id:str):
for connection in self.active_connections[room_id]:
await connection.send_text(message)
manager = ConnectionManager()
@app.get("/")
async def get():
return HTMLResponse(html)
@app.websocket("/ws/{room_id}/{client_id}")
async def websocket_endpoint(websocket: WebSocket, room_id:str, client_id: int):
await manager.connect(room_id, websocket)
try:
while True:
data = await websocket.receive_text()
await manager.send_personal_message(f"You wrote: {data}", room_id, websocket)
await manager.broadcast(f"Client #{client_id} says: {data}", room_id)
except WebSocketDisconnect:
manager.disconnect(room_id, websocket)
await manager.broadcast(f"Client #{client_id} left the chat", room_id)
本文地址:http://www.04007.cn/article/979.html,未经许可,不得转载. 本文地址:http://www.04007.cn/article/979.html 未经许可,不得转载. 手机访问本页请扫描右下方二维码.
|
|
手机扫码直接打开本页面 |
