在go中实现io.WriterAt的缓冲区 [英] Buffer implementing io.WriterAt in go

问题描述

我正在使用aws-sdk从s3存储桶下载文件. S3下载功能想要实现io.WriterAt的东西，但是bytes.Buffer不能实现.现在，我正在创建一个实现io.WriterAt的文件，但是我想在内存中添加一些东西.

I'm using the aws-sdk to download a file from an s3 bucket. The S3 download function want's something that implements io.WriterAt however bytes.Buffer doesn't implement that. Right now I'm creating a file which implements io.WriterAt but I'd like something in memory.

推荐答案

对于涉及AWS开发工具包的案例，请使用

For cases involving the AWS SDK, use aws.WriteAtBuffer to download S3 objects into memory.

requestInput := s3.GetObjectInput{
    Bucket: aws.String(bucket),
    Key:    aws.String(key),
}

buf := aws.NewWriteAtBuffer([]byte{})
downloader.Download(buf, &requestInput)

fmt.Printf("Downloaded %v bytes", len(buf.Bytes()))

这篇关于在go中实现io.WriterAt的缓冲区的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！