重定向到当前URL，但替换字符串？

// 获取当前URL
var currentUrl = window.location.href;

// 替换字符串
var newUrl = currentUrl.replace("oldString", "newString");

// 重定向到新URL
window.location.href = newUrl;

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

app.get('/redirect', (req, res) => {
  // 获取当前URL
  var currentUrl = req.protocol + '://' + req.get('host') + req.originalUrl;

  // 替换字符串
  var newUrl = currentUrl.replace("oldString", "newString");

  // 重定向到新URL
  res.redirect(newUrl);
});

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