从链接下载文件并检查下载是否完成nodejs

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

const fileUrl = 'http://example.com/file.zip';
const filePath = '/path/to/save/file.zip';

const downloadFile = (url, path) => {
  return new Promise((resolve, reject) => {
    const file = fs.createWriteStream(path);
    const request = http.get(url, (response) => {
      response.pipe(file);
      file.on('finish', () => {
        file.close(() => {
          console.log('Download completed');
          resolve();
        });
      });
    });
    request.on('error', (err) => {
      fs.unlink(path, () => {
        reject(err);
      });
    });
  });
};

downloadFile(fileUrl, filePath)
  .then(() => {
    // 检查文件是否下载完成
    fs.stat(filePath, (err, stats) => {
      if (err) {
        console.error('Error occurred while checking file status:', err);
      } else {
        console.log('File size:', stats.size);
      }
    });
  })
  .catch((err) => {
    console.error('Error occurred while downloading file:', err);
  });