如何在后端使用state发出POST fetch请求

const http = require('http');
const fetch = require('node-fetch');

const server = http.createServer((req, res) => {
  // 处理请求
});
server.listen(3000, () => {
  console.log('Server is running on port 3000');
});

const server = http.createServer((req, res) => {
  if (req.method === 'POST') {
    let body = '';
    req.on('data', (chunk) => {
      body += chunk;
    });
    req.on('end', () => {
      const data = JSON.parse(body);
      // 使用state对象中的数据构建POST请求的参数和数据
      const options = {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify(data),
      };
      // 发出POST请求
      fetch('http://api.example.com/post', options)
        .then((response) => response.json())
        .then((result) => {
          // 处理POST请求的响应结果
          res.statusCode = 200;
          res.setHeader('Content-Type', 'application/json');
          res.end(JSON.stringify(result));
        })
        .catch((error) => {
          // 处理POST请求的错误
          res.statusCode = 500;
          res.end(error.message);
        });
    });
  } else {
    res.statusCode = 404;
    res.end('Not Found');
  }
});