- 优势：低延迟、实时数据传输
- 应用场景：聊天应用、在线游戏、实时金融报价等

- 优势：服务器发起的事件驱动，更简单的实现和较少的资源消耗
- 应用场景：实时数据推送、监控、日志等

import asyncio
import websockets

async def websocket_handler(websocket, path):
    async with websocket:
        while True:
            message = await websocket.recv()
            if message:
                # 处理消息
                print("Received:", message)
            else:
                print("Connection closed.")

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=8080, debug=True)

const socket = io();

socket.on("connect", () => {
  console.log("Connected to server!");
});

socket.on("message", (data) => {
  console.log("Received:", data);
});

socket.send("Hello server!");

import asyncio
import eventlet

def sse_handler(socket, addr):
    async def send_update(message):
        while True:
            await socket.send(message)
            await asyncio.sleep(1)  # 发送间隔，可根据需求调整

    async def receive_update():
        while True:
            message = await socket.recv()
            if message:
                # 处理消息
                print("Received:", message)
            else:
                print("Connection closed.")

    send_update("Hello server!")
    asyncio.ensure_future(receive_update())

# 运行服务
eventlet.spawn(sse_handler, socket, addr)