ES6环境下集成connect-redis与express-session报错求助

问题场景 #

在ES6项目中集成connect-redis与express-session，代码实现如下：

import session from 'express-session';
import connectRedis from 'connect-redis';
import { createClient } from 'redis';

const app = express();

async function startServer() {
    const redisURL = 'redis://localhost:6379';
    const redisClient = createClient();
    const RedisStore = connectRedis(session);
    await redisClient.connect({ url: redisURL });
    const store = new RedisStore({ redisClient });

    app.use(session({
        store: store ,
        secret: process.env.SESSION_SECRET,
        resave: false,
        saveUninitialized: false,    
        cookie: { 
            httpOnly: true, 
            path: '/', 
            sameSite: 'strict',
            expires: new Date(Date.now() + 30 * 24 * 60 * 60 * 1000) 
        }
    }));
}

报错信息 #

D:\AI Projects\Hplayer - Copy\server\server.js:33
RedisStore = (0, _connectRedis["default"])(_expressSession["default"]);
^
TypeError: Class constructor RedisStore cannot be invoked without 'new'

解决方案 #

该错误源于connect-redis v7+版本的API变更，旧版本通过connectRedis(session)生成Store类的方式已被废弃，需调整为以下写法：

import session from 'express-session';
// 直接导入RedisStore类
import { RedisStore } from 'connect-redis';
import { createClient } from 'redis';

const app = express();

async function startServer() {
    const redisURL = 'redis://localhost:6379';
    // 初始化redisClient时直接传入URL参数
    const redisClient = createClient({ url: redisURL });
    await redisClient.connect();

    app.use(session({
        // 实例化RedisStore时，参数键名改为client
        store: new RedisStore({ client: redisClient }),
        secret: process.env.SESSION_SECRET,
        resave: false,
        saveUninitialized: false,    
        cookie: { 
            httpOnly: true, 
            path: '/', 
            sameSite: 'strict',
            expires: new Date(Date.now() + 30 * 24 * 60 * 60 * 1000) 
        }
    }));
}

关键修改点 #

• 直接从connect-redis导入RedisStore类，无需再通过connectRedis(session)生成
• 实例化RedisStore时，配置参数的键名从redisClient改为client
• 创建redis客户端时，直接将URL传入createClient，无需在connect方法中重复传入

内容的提问来源于stack exchange，提问作者Hetnon Freitas