Question

我想压缩文件并将二进制输出转储到AWS S3。我首先测试我的代码，确保它甚至可以写入本地ZIP文件，但是无效。

function zipFiles(filenames) {
  return new Promise((resolve, reject) => {
    const child = spawn(zipCmd, ['-'].concat(filenames));
    let buffer = '';

    child.stdout.on('data', (data) => {
      buffer += data.toString();
    });

    child.stderr.on('data', (data) => {
      // console.error(data.toString());
    });

    child.on('close', (code) => {
      fs.writeFileSync('testing.zip', buffer);
      resolve(code);
    });
  });
}

这会导致损坏的zip文件。我不确定如何处理来自spawn的缓冲流并将其组合成可与s3.putObject和fs.writeFileSync一起使用的东西（作为测试方法）。

Answer 1

知道了！

function zipFiles(filenames) {
  return new Promise((resolve, reject) => {
    const out = fs.openSync('testing.zip', 'a');
    const child = spawn(zipCmd, ['-'].concat(filenames));
    let buffer = new Buffer('');

    child.stdout.on('data', (data) => {
      buffer = Buffer.concat([buffer, data]);
    });

    child.stderr.on('data', (data) => {
      // console.error(data.toString());
    });

    child.on('close', (code) => {
      fs.writeFileSync('testing.zip', buffer);
      resolve(code);
    });
  });
}

如何将Node.js二进制流从zip写入S3

1 个答案: