如何在NodeJS中将文件从S3存储桶上传到服务器(SFTP)？

npm install aws-sdk

const AWS = require('aws-sdk');
const fs = require('fs');
const { Client } = require('ssh2');

AWS.config.update({
  accessKeyId: 'YOUR_ACCESS_KEY',
  secretAccessKey: 'YOUR_SECRET_ACCESS_KEY',
  region: 'YOUR_S3_BUCKET_REGION'
});

const s3 = new AWS.S3();
const params = {
  Bucket: 'YOUR_S3_BUCKET_NAME',
  Key: 'YOUR_FILE_KEY'
};

s3.getObject(params, (err, data) => {
  if (err) {
    console.error(err);
  } else {
    // 将文件数据保存到本地临时文件
    fs.writeFileSync('temp_file', data.Body);
    console.log('文件下载成功！');
  }
});

const conn = new Client();
conn.on('ready', () => {
  conn.sftp((err, sftp) => {
    if (err) {
      console.error(err);
    } else {
      // 上传文件到服务器
      const readStream = fs.createReadStream('temp_file');
      const writeStream = sftp.createWriteStream('REMOTE_FILE_PATH');
      readStream.pipe(writeStream);
      console.log('文件上传成功！');
    }
    conn.end();
  });
}).connect({
  host: 'YOUR_SFTP_HOST',
  port: 'YOUR_SFTP_PORT',
  username: 'YOUR_SFTP_USERNAME',
  password: 'YOUR_SFTP_PASSWORD'
});