如何同时接受JSON和XML？

npm install express body-parser xml2js

const express = require('express');
const bodyParser = require('body-parser');
const xml2js = require('xml2js');

const app = express();

// 解析JSON格式的请求体
app.use(bodyParser.json());

// 解析XML格式的请求体
app.use(bodyParser.text({ type: 'application/xml' }));

app.post('/data', (req, res) => {
  const acceptHeader = req.get('Accept');
  let data;

  if (acceptHeader && acceptHeader.includes('application/xml')) {
    // 处理XML数据
    xml2js.parseString(req.body, (err, result) => {
      if (err) {
        return res.status(400).send('Invalid XML');
      }
      data = result;
      res.send(data);
    });
  } else {
    // 处理JSON数据
    data = req.body;
    res.send(data);
  }
});

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