websocket - node.js express使用socket-io時，要如何做帳號驗證?

Answer 1

Socket#request:Request
A getter proxy that returns the reference to the request that
originated the underlying engine.io Client. Useful for accessing
request headers such as Cookie or User-Agent.

socket.io

通过 socket.request.headers.cookie 来得到cookie
通过 socket.request.session 来得到session

io.on('connection', function(socket){
    if(socket.request.session.isLogin()){
        //....已登入成功 做其他事情
    }
    
    else{
        socket.close();
    }
});

Answer 2

我是另外把socket按id储存起来，登录时，emit('login',id)，服务端响应更新该socket的id，退出则删除，socket.id=null，socketManager.remove('xx')。