如何在Express中将数据/变量从POST路由传递到GET路由？

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

// 使用session中间件
app.use(session({
  secret: 'secret-key',
  resave: false,
  saveUninitialized: true
}));

app.post('/post-route', (req, res) => {
  // 存储数据/变量在session中
  req.session.myData = 'Hello, World!';
  res.redirect('/get-route');
});

app.get('/get-route', (req, res) => {
  // 从session中获取数据/变量
  const myData = req.session.myData;
  res.send(myData);
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

const express = require('express');
const app = express();

// 中间件函数
const myMiddleware = (req, res, next) => {
  // 从请求中获取数据/变量
  const myData = req.body.myData;
  // 将数据/变量存储在请求对象中
  req.myData = myData;
  next();
};

app.use(express.urlencoded({ extended: true }));

app.post('/post-route', myMiddleware, (req, res) => {
  res.redirect('/get-route');
});

app.get('/get-route', (req, res) => {
  // 从请求对象中获取数据/变量
  const myData = req.myData;
  res.send(myData);
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});