How to make an native nodejs websocket server with the http module?

websocket server with the http module?"/>

How to make an native nodejs websocket server with the http module?

我已经尝试通过从其他来源放置一些代码来自己制作一个，但它不起作用。这是我所拥有的：

server.on("upgrade",(req,socket)=>{
    let accept = crypto.Hash("sha1").update(req.headers["sec-websocket-key"]+"258EAFA5-E914-47DA-95CA-C5AB0DC85B11").digest("base64")
    const headers = [
    'HTTP/1.1 101 Switching Protocols',
    'Upgrade: WebSocket',
    'Connection: Upgrade',
    'Sec-WebSocket-Accept: '+accept,
        ''
  ].map(line => line.concat('\r\n')).join('')
    socket.write(headers)
    socket.on("data", (data)=>{
        console.log('server!', data.toString("utf8")) // showing up as �������9
        socket.write("hellow!!") // this is supposed to write back a message, but the client recieves "Invalid Frame Header"
    })
    socket.on("error",(err)=>{
        console.log(err)
    })
    socket.on("end",()=>{
        console.log("disconnect")
    })
})

server.listen(80, () => {
  console.log("Started.")
})

我想解码从客户端收到的数据并发回消息。我在网上找不到很好的例子。