Express.js会话未定义.复述

Question

尝试使用Redis设置会话。我有我的Redis DB在一个dokku容器，链接到我的应用程序(也在dokku容器)。我总是得到一个未定义的会话。我把东西精简到最低限度，还检查了运行的顺序。我仍然得到一个undefined

I've read here 'session'

当使用express/redis作为会话存储和express js会话未定义时是未定义的。

我不需要使用cookie-parser，因为expression-session里面有cookie的东西，而且文档说cookie-parser会导致expression-session出现问题。

var express = require('express');
var session = require('express-session');
var redisStore = require('connect-redis')(session);
var bodyParser = require('body-parser');
var app = express();
app.set('port', (process.env.PORT || 5000));
var redisURL =  'redis://xxxxx:1234567@bar-redis-foo:6379';
var store = new redisStore({ url: redisURL });
app.use(session({
    secret: 'ssshhhhh',
    store: store,
    saveUninitialized: true,
    resave: true
}));

app.use(express.static(__dirname + '/public'));
app.use(bodyParser.json()); // to support JSON-encoded bodies
app.use(bodyParser.urlencoded({ // to support URL-encoded bodies
    extended: true
}));
app.get('/', function(req, res, next) {
    console.log(req.session); // Logs Undefined
    res.send('Hello');
});

Answer 1

检查您的redis连接并再次运行。示例代码如下行

"use strict";
const express = require("express");
const bodyParser = require("body-parser");
const session = require("express-session");
const RedisStore = require("connect-redis")(session);
const app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: false}));
app.use(session({
    secret: "$kx(Fj$uB!Ug!@jCkguFmc6f7t<c-e$9",
    resave: false,
    saveUninitialized: true,
    store: new RedisStore({
        url: "redis://:********@pub-redis-12766.eu-central-1-1.1.ec2.redislabs.com:12766",
        ttl: 5 * 60 // 5 minute (Session store time)
    })
}));
app.use(function (request, response, next) {
    let path = request.originalUrl;
    if (request.session.user) {
        request.session.reload(function (err) { //session expire time regenerate
            if (!err) {
                next();
            } else {
                response.redirect('/login');
            }
        });
    } else {
        if (path == '/login') {
            next();
        } else {
            response.redirect('/login');
        }
    }
});
app.get('/', function(request, response) {
    if (request.session.user) {
        response.send(request.session.user);
    } else {
        response.redirect("/login");
    }
});
app.get('/login', function(request, response) {
    if (request.session.user) {
        response.redirect("/");
    } else {
        request.session.user = {username: "halil"}; //custom key {user} and custom data {username: "halil"}
    }
    response.send('Login');
});
app.get('/logout', function(request, response) {
    if (request.session.user) {
        request.session.destroy();
        response.redirect("/login");
    } else {
        response.redirect("/login");
    }
});
app.listen(app.get('port'), function () {
    console.log('App is working on port: ' + app.get('port'));
});