js 获取request参数

// 假设当前URL为 "http://example.com/?name=John&age=30"
const params = new URLSearchParams(window.location.search);
const name = params.get('name'); // "John"
const age = params.get('age'); // "30"

function getQueryParams() {
  const query = window.location.search.substring(1); // 去除问号
  const params = query.split('&');
  const result = {};
  params.forEach(param => {
    const [key, value] = param.split('=');
    result[decodeURIComponent(key)] = decodeURIComponent(value);
  });
  return result;
}

const params = getQueryParams();
console.log(params.name); // "John"
console.log(params.age); // "30"

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

app.get('/user', (req, res) => {
  const name = req.query.name; // 从查询字符串中获取"name"
  const age = req.query.age; // 从查询字符串中获取"age"
  res.send(`Name: ${name}, Age: ${age}`);
});

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

app.get('/user/:id', (req, res) => {
  const userId = req.params.id; // 从路由中获取"id"
  res.send(`User ID: ${userId}`);
});

const bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: true }));

app.post('/user', (req, res) => {
  const name = req.body.name; // 从POST请求体中获取"name"
  const age = req.body.age; // 从POST请求体中获取"age"
  res.send(`Name: ${name}, Age: ${age}`);
});