Node.js NodeJS Expres+；Redistore，请求会话始终未定义

我确实看到了一些类似的问题，但九个问题可以解决我的问题

在nodeJS Express应用程序中始终未定义req.session。 在express/connect redis/和express会话包上使用最新版本

var express = require('express') ;
var app = express() ;
var port = process.env.PORT || 8008  ;
var mongoose = require('mongoose') ;
var cookieParser = require('cookie-parser') ;
var bodyParser   = require('body-parser');
var session      = require('express-session') ;
var RedisStore = require('connect-redis')(session);
var Hash = require('password-hash') ;
var helmet = require('helmet') ;


app.use(express.static(__dirname + "/view" )) ;
app.use(cookieParser() );
app.use(bodyParser()) ;
app.use(session({
        saveUninitialized: true,
        resave: true ,
        store: new RedisStore({
            host: 'localhost',
            port: 7379,
            db: 2,
            pass: 'somePassworD'
        }),
        secret: 'someSecret' ,
        //cookie: { secure: true}
    })
);

app.use(helmet()) ;
app.use(function (req, res, next) {
    res.locals.csrftoken = req.session._csrf; 
    next();
}) ;

错误消息：

TypeError: Cannot read property '_csrf' of undefined

---

当您使用中间件时，将出现CSRF令牌

var express = require('express') ;
var app = express() ;
var port = process.env.PORT || 8008  ;
var csrf    = require('csurf')
var mongoose = require('mongoose') ;
var cookieParser = require('cookie-parser') ;
var bodyParser   = require('body-parser');
var session      = require('express-session') ;
var RedisStore = require('connect-redis')(session);
var Hash = require('password-hash') ;
var helmet = require('helmet') ;


app.use(express.static(__dirname + "/view" )) ;
app.use(cookieParser() );
app.use(bodyParser()) ;
app.use(session({
        saveUninitialized: true,
        resave: true ,
        store: new RedisStore({
            host: 'localhost',
            port: 7379,
            db: 2,
            pass: 'somePassworD'
        }),
        secret: 'someSecret' ,
        //cookie: { secure: true}
    })
);

app.use(csrf()); 

app.use(helmet()) ;
app.use(function (req, res, next) {
    res.locals.csrftoken = req.session._csrf; 
    next();
}) ;

---

评论csrf系列并没有解决问题，我相信问题出在redis Store上，评论出这一部分以某种方式解决了问题！