从nodejs函数返回zip文件

const fs = require('fs');
const archiver = require('archiver');

function createZipFile(req, res) {
  const zipFileName = 'example.zip';
  const output = fs.createWriteStream(zipFileName);
  const archive = archiver('zip', {
    zlib: { level: 9 } // 设置压缩级别
  });

  output.on('close', () => {
    console.log(archive.pointer() + ' total bytes');
    console.log('archiver has been finalized and the output file descriptor has closed.');
  });

  archive.on('error', (err) => {
    throw err;
  });

  res.attachment(zipFileName); // 设置响应头

  archive.pipe(res); // 将archiver实例的输出流传输到响应流中

  archive.directory('path/to/directory', false); // 添加要压缩的文件或目录

  archive.finalize(); // 完成压缩

  // 返回响应
  res.status(200).send('Zip file created successfully.');
}