在node.js中存储请求流中的文件

const fs = require('fs');
const { createWriteStream } = require('fs');

const readStream = req.createReadStream();
const writeStream = createWriteStream('path/to/save/file.txt');

readStream.pipe(writeStream);

readStream.on('end', () => {
  console.log('文件保存成功');
});

readStream.on('error', (err) => {
  console.error('文件保存失败', err);
});

const COS = require('cos-nodejs-sdk-v5');
const cos = new COS({
  SecretId: 'YOUR_SECRET_ID',
  SecretKey: 'YOUR_SECRET_KEY',
});

const readStream = req.createReadStream();

const params = {
  Bucket: 'your-bucket',
  Region: 'your-region',
  Key: 'path/to/save/file.txt',
  Body: readStream,
};

cos.putObject(params, (err, data) => {
  if (err) {
    console.error('文件保存失败', err);
  } else {
    console.log('文件保存成功');
  }
});