Question

我使用这篇文章中的脚本从s3下载文件。一切正常，但下载的文件都是0B。

我的脚本与上面的脚本基本相同。我使用~/.aws/credentials设置我的密钥并在脚本中设置区域。

这是我的剧本：

package main

import (
    "fmt"
    "os"
    "path/filepath"

    "github.com/aws/aws-sdk-go/service/s3"
    "github.com/aws/aws-sdk-go/aws"
    "github.com/aws/aws-sdk-go/service/s3/s3manager"
)

var (
    Bucket         = "logs" // Download from this bucket
    Prefix         = "local-dir/my_log/20150611/20150611"    // Using this key prefix
    LocalDirectory = "s3logs"   // Into this directory
)

func main() {
    manager := s3manager.NewDownloader(nil)
    d := downloader{bucket: Bucket, dir: LocalDirectory, Downloader: manager}

    client := s3.New(&aws.Config{Region: "ap-northeast-1"})
    params := &s3.ListObjectsInput{Bucket: &Bucket, Prefix: &Prefix}
    client.ListObjectsPages(params, d.eachPage)
}

type downloader struct {
    *s3manager.Downloader
    bucket, dir string
}

func (d *downloader) eachPage(page *s3.ListObjectsOutput, more bool) bool {
    for _, obj := range page.Contents {
        d.downloadToFile(*obj.Key)
    }

    return true
}

func (d *downloader) downloadToFile(key string) {
    // Create the directories in the path
    file := filepath.Join(d.dir, key)

    if err := os.MkdirAll(filepath.Dir(file), 0775); err != nil {
      panic(err)
    }
    fmt.Printf("Downloading " + key)
    // Setup the local file
    fd, err := os.Create(file)
    if err != nil {
        panic(err)
    }

    defer fd.Close()

    // Download the file using the AWS SDK
    fmt.Printf("Downloading s3://%s/%s to %s...\n", d.bucket, key, file)
    params := &s3.GetObjectInput{Bucket: &d.bucket, Key: &key}
    d.Download(fd, params)
}

该脚本很好地列出了存储桶中的对象，但没有将文件下载到我的本地文件系统中。并且脚本没有遇到任何异常。

知道为什么吗？谢谢！

Go - 无法使用s3manager从s3下载

0 个答案: