Express 4 Sessions not persisting when restarting server

问题

I have an Express 4 app setup to have sessions.

// Sessions
app.use(cookieParser());
app.use(session({ secret: "some-secret" }));

// Signup
app.post("/signup", function (req, res) {
    create_user(req.body.user, function (err, user_id) {
        req.session.user_id = user_id;
        res.redirect("/admin");
    });
});

When I submit the form, it saves the user_id to the req.session. However, when I restart the server, the session is gone.

Why isn't it persisting? Am I missing some configuration?

回答1:

The default session store for express-session is MemoryStore, which as the name suggests, stores sessions in memory only. If you need persistence, there are many session stores available for Express. Some examples:

• Cookie store
• Redis store
• MongoDB store
• CouchDB store
• Riak store
• memcached store
• leveldb store
• MySQL store
• PostgreSQL store
• Firebase store

来源：https://stackoverflow.com/questions/23260676/express-4-sessions-not-persisting-when-restarting-server