expressjs保存/更新mongoDB上的数据而不渲染任何内容

const express = require('express');
const bodyParser = require('body-parser');
const MongoClient = require('mongodb').MongoClient;

const app = express();
const port = 3000;
const mongoUrl = 'mongodb://localhost:27017/mydatabase';

app.use(bodyParser.json());

app.post('/data', (req, res) => {
  const data = req.body;

  MongoClient.connect(mongoUrl, (err, client) => {
    if (err) {
      console.error('Failed to connect to MongoDB:', err);
      res.sendStatus(500);
      return;
    }

    const db = client.db();
    const collection = db.collection('mycollection');

    collection.insertOne(data, (err, result) => {
      if (err) {
        console.error('Failed to insert data into MongoDB:', err);
        res.sendStatus(500);
        return;
      }

      res.sendStatus(200);
      client.close();
    });
  });
});

app.put('/data/:id', (req, res) => {
  const id = req.params.id;
  const data = req.body;

  MongoClient.connect(mongoUrl, (err, client) => {
    if (err) {
      console.error('Failed to connect to MongoDB:', err);
      res.sendStatus(500);
      return;
    }

    const db = client.db();
    const collection = db.collection('mycollection');

    collection.updateOne({ _id: id }, { $set: data }, (err, result) => {
      if (err) {
        console.error('Failed to update data in MongoDB:', err);
        res.sendStatus(500);
        return;
      }

      res.sendStatus(200);
      client.close();
    });
  });
});

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