每次React向Express发送请求时,都会生成一个新会话

Question

我使用React的客户端发送请求,Express与proxy和express-session设置.但每次React向Express服务器发出请求时,都会创建一个新会话.所以我通过手动访问相同的api url来单独检查Express,并且每次刷新页面时它都会继续使用相同的会话.

项目结构:

project-folder
 - client // React client with proxy set up
      + src
      + package.json
      + ...
 - server.js
 - package.json

内部server.js:

const session = require('express-session');

let sessionConf = {
    name: 'aoid',
    secret: 'stackoverflow',
    resave: true,
    saveUninitialized: true,
    rolling: true,
    cookie: {
        httpOnly: false,
        secure: false,
        maxAge: 2000000
    }
};

app.use(session(sessionConf));

app.get('/api/prod', (req, res, next) => {
    let sessionId = req.sessionID;  // is generated each time React client send request, works fine with api alone!
    console.log(sessionId);

    if (!sessionId) return res.status(401).send('Unauthorized Error');
    res.status(200).send({ data });
});

以下是React客户端如何将其请求发送到Express:

let loadItems = async () => {
    const response = await fetch('/api/prod');
    const body = await response.json();

    if (response.status !== 200) throw Error(body.message);
    return body;
}

我认为问题来自React和Express之间的错误配置.以前有人有这个问题吗？

Answer 1

fetchcookie默认情况下不发送,您需要明确设置它:

fetch(url, {
  method: 'GET',
  credentials: 'include',
  // ...
})