如何获取此get请求的json正文？

const http = require('http');
const url = require('url');
const querystring = require('querystring');

const server = http.createServer((req, res) => {
  const parsedUrl = url.parse(req.url);
  const query = querystring.parse(parsedUrl.query);
  
  // 获取GET请求的JSON数据
  const jsonData = query.json;
  
  // 对获取到的JSON数据进行处理
  // ...
  
  res.end('GET request processed');
});

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