Calling express-session backed by connect-redis inside websockets/ws

问题

Okay so here goes. I am trying to to use express-session backed by connect-redis together with websockets/ws. The vast majority of example code I have seen usually includes the use of Express to serve the client a websocket script of some type and then configuring the server app to use the express-session middleware to work with session data...with websockets further down the process chain.

My client side app on the other hand immediately initiates an Opening Handshake/Upgrade request, which bypasses Express and heads straight into websockets/ws. For this reason I am not able to work with session data through the commonly used app.use(session(...) middleware setup.

The below code uses a setup that allows me to call express-session inside websocket/ws and to put the connection request through express-session so I can get at the session data. This works as is shown by the output also below. What does not work however is backing express-session by connect-redis inside this setup. To check I call a redis client directly to query my redis box after express-session has run, no keys are returned.

I have three questions: 1. Is what I am doing below the 'correct' way of integrating express-session with websockets/ws for the client setup described? 2. If not what should I be doing? 3. If this is a good way, is it possible to get connect-redis working as session store?

Your insights are very welcome.

Server-side code:

const express = require('express');
const Session = require('express-session');
const http = require('http');
const ws = require('ws');
const util = require('util');
const redis = require('redis');
const client = redis.createClient(6379, '10.0.130.10', {no_ready_check: true});
const RedisStore = require('connect-redis')(Session);
const SessionStore = new RedisStore({host: '10.0.130.10', port: '6379', ttl: 60, logErrors: true});
//const SessionStore = new Session.MemoryStore();


var session = Session({
    store: SessionStore,
    cookie: {secure: true, maxAge: 3600, httpOnly: true},
    resave: false,
    saveUninitialized: true,
    secret: '12345'
});


// Define Express and WS servers
const app = express();
const server = http.createServer(app);
const wss = new ws.Server({ server });


// WS Websocket
wss.on('connection', function connection(ws, req) {

    session(req, {}, function(){
        let sessionId = req.sessionID;
        console.log('SessionID: ' + sessionId);

        let sessionCookie = req.session.cookie;
        console.log('SessionCookie: ' + JSON.stringify(sessionCookie));
    });

    client.keys('*', function(err, reply) {
        // reply is null when the key is missing
        console.log('Redis reponse: ' + reply);
    });
});


server.listen(10031, function listening() {
  console.log('Listening on: ' + server.address().port);
});

Server-side console.log output (note the Redis response):

Listening on: 10031 SessionID: Oi8AdsoZTAm3hRLmxPfGo43Kmmj_Yd6F SessionCookie: {"originalMaxAge":3599,"expires":"2017-05-29T17:45:54.467Z","secure":true,"httpOnly":true,"path":"/"} Redis reponse:

Reference: express-session, connect-redis and einaros/ws Reference: ExpressJS & Websocket & session sharing

来源：https://stackoverflow.com/questions/44248437/calling-express-session-backed-by-connect-redis-inside-websockets-ws

标签

express

websocket

Redis

express-session