如何使用 AWS SDK v3 将流上传到 S3

Question

我必须将文件从 API 端点传输到两个不同的存储桶。原始上传使用：

curl -X PUT -F "data=@sample" "http://localhost:3000/upload/1/1"

上传文件的端点：

const PassThrough = require('stream').PassThrough;

async function uploadFile (req, res) {
  try {
    const firstS3Stream = new PassThrough();
    const secondS3Stream = new PassThrough();
    req.pipe(firstS3Stream);
    req.pipe(secondS3Stream);

    await Promise.all([
      uploadToFirstS3(firstS3Stream),
      uploadToSecondS3(secondS3Stream),
    ]);
    return res.end();
  } catch (err) {
    console.log(err)
    return res.status(500).send({ error: 'Unexpected error during file upload' });
  }
}

如你所见，我用了两个PassThrough streams, in order to duplicate the request stream into two readable streams, as suggested 。

这段代码不变，这里有趣的是uploadToFirstS3和uploadToSecondS3函数。在这个最小的例子中，两者都用不同的配置做完全相同的事情，我将在这里只花费一个。

有效的方法：

const aws = require('aws-sdk');

const s3 = new aws.S3({
  accessKeyId: S3_API_KEY,
  secretAccessKey: S3_API_SECRET,
  region: S3_REGION,
  signatureVersion: 'v4',
});

const uploadToFirstS3 = (stream) => (new Promise((resolve, reject) => {
  const uploadParams = {
    Bucket: S3_BUCKET_NAME,
    Key: 'some-key',
    Body: stream,
  };
  s3.upload(uploadParams, (err) => {
    if (err) reject(err);
    resolve(true);
  });
}));

这段代码（为了减少工程大小，基于aws-sdk package) works fine. My issue here is that i want it to run with the @aws-sdk/client-s3包。

什么不起作用：

我第一次尝试使用 S3Client.send(PutObjectCommand):

const { S3Client, PutObjectCommand } = require('@aws-sdk/client-s3');

const s3 = new S3Client({
  credentials: {
    accessKeyId: S3_API_KEY,
    secretAccessKey: S3_API_SECRET,
  },
  region: S3_REGION,
  signatureVersion: 'v4',
});

const uploadToFirstS3 = (stream) => (new Promise((resolve, reject) => {
  const uploadParams = {
    Bucket: S3_BUCKET_NAME,
    Key:'some-key',
    Body: stream,
  };
  s3.send(new PutObjectCommand(uploadParams), (err) => {
    if (err) reject(err);
    resolve(true);
  });
}));

然后我尝试了 S3.putObject(PutObjectCommandInput):

const { S3 } = require('@aws-sdk/client-s3');

const s3 = new S3({
  credentials: {
    accessKeyId: S3_API_KEY,
    secretAccessKey: S3_API_SECRET,
  },
  region: S3_REGION,
  signatureVersion: 'v4',
});

const uploadToFirstS3 = (stream) => (new Promise((resolve, reject) => {
  const uploadParams = {
    Bucket: S3_BUCKET_NAME,
    Key:'some-key',
    Body: stream,
  };
  s3.putObject(uploadParams, (err) => {
    if (err) reject(err);
    resolve(true);
  });
}));

最后两个例子都给我一个 501 - Not Implemented 错误 header Transfer-Encoding。我检查了 req.headers 里面没有 Transfer-Encoding ，所以我猜 sdk 添加到 s3 的请求中 ?

自第一个示例（基于 aws-sdk) works fine, I'm sure the error is not due to an empty body in the request as suggested in this SO thread.

不过，我认为在触发上传时流可能还不可读，因此我将对 uploadToFirstS3 和 uploadToSecondS3 的调用包装在 req.on('readable', callback) 触发的回调中事件，但没有任何改变。

我想处理内存中的文件，而不是随时将其存储在磁盘上。有没有办法使用 @aws-sdk/client-s3 包来实现它？

Answer 1

在 S3 中，您可以使用 @aws-sdk/lib-storage 中的 Upload class 进行分段上传。不幸的是，@aws-sdk/client-s3 的文档站点中似乎没有提及这一点。

这里的升级指南中提到了它：https://github.com/aws/aws-sdk-js-v3/blob/main/UPGRADING.md#s3-multipart-upload

这是https://github.com/aws/aws-sdk-js-v3/tree/main/lib/lib-storage中提供的示例：

  import { Upload } from "@aws-sdk/lib-storage";
  import { S3Client } from "@aws-sdk/client-s3";

  const target = { Bucket, Key, Body };
  try {
    const parallelUploads3 = new Upload({
      client: new S3Client({}),
      tags: [...], // optional tags
      queueSize: 4, // optional concurrency configuration
      leavePartsOnError: false, // optional manually handle dropped parts
      params: target,
    });

    parallelUploads3.on("httpUploadProgress", (progress) => {
      console.log(progress);
    });

    await parallelUploads3.done();
  } catch (e) {
    console.log(e);
  }

如何使用 AWS SDK v3 将流上传到 S3

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