javascript - 如何找到我刚刚上传到 S3 的流的总大小？

Question

在 Node.js 服务器上，我正在将流上传到 S3。这是一个简化的示例:

import S3 from "aws-sdk/clients/s3"

const s3 = new S3({ accessKeyId, secretAccessKey, region })

async function uploadStream(key, stream) {
  const upload = s3.upload({
    Body: stream,
    Bucket: clientFiles,
    Key: key,
  })

  const result = await upload.promise()
  return result // { Bucket, ETag, Key, Location }
}

由于我使用的是流，所以在开始上传时我不知道总大小，上传结果除了 Bucket、ETag、Key 和 Location 值之外什么也没有给我。

如何获取上传流的总大小？

Answer 1

使用 ManagedUpload 和 httpUploadProgress 怎么样？
https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3/ManagedUpload.html#httpUploadProgress-event

async function uploadStream(key, stream) {
  const upload = new AWS.S3.ManagedUpload({
    params: {
      Body: stream,
      Bucket: clientFiles,
      Key: key
    }
  });
  upload.on("httpUploadProgress", function(progress) {
    console.log(progress.total);
  });
  ...