Question

我正在使用AWS SDK编写Powershell脚本，以便在S3中从存储桶中的特定目录下载指定数量的文件。

当我运行脚本时，我会在循环的每次迭代中得到此错误：

Read-S3Object : Illegal characters in path.
At line:21 char:5
+     Read-S3Object -BucketName $BucketName -Key $Key -File $LocalFile
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (Amazon.PowerShe...dS3ObjectCmdlet:ReadS3ObjectCmdlet) [Read-S3Object], Inv 
   alidOperationException
    + FullyQualifiedErrorId : Amazon.Runtime.AmazonServiceException,Amazon.PowerShell.Cmdlets.S3.ReadS3ObjectCmdlet

我尝试了一些变体，我怀疑这是包含以下内容的文件夹的问题：或\

Param( 
   [Parameter(Mandatory=$False)] [String]$WorkingDir = "C:\Temp\Testing\",
   [Parameter(Mandatory=$False)] [String]$BucketName = "BucketName",
   [Parameter(Mandatory=$False)] [String]$DownloadFolder = "Testing",
   [Parameter(Mandatory=$False)] [int]$FileCount = 100
    )

$FilesToDownload = Get-S3Object -BucketName $BucketName -KeyPrefix $DownloadFolder -MaxKey $FileCount

$FilesToDownload | ForEach-Object {

    $Key       = ($_.Key | Out-String)
    $File      = $Key.TrimStart($DownloadFolder + "/")
    $LocalFile = Join-Path $WorkingDir $File

    Read-S3Object -BucketName $BucketName -Key $Key -File $LocalFile

    }

我可以让下面的内容工作，这正是ForEach循环正在做的事情：

Read-S3Object -BucketName BucketName -Key Testing/text.txt -File C:\Temp\Testing\test.txt

Answer 1

看起来$ LocalFile变量中有一些非法字符，特别是回车，换行。

我通过这样做来修复它：

$LocalFile = $LocalFile -replace "`n",""
$LocalFile = $LocalFile -replace "`r",""

Answer 2

真正的问题是以下几行。

import {ObjectId} from 'promised-mongo';

如果您只设置$ Key = $ _。键，那么您不会从out-string获得回车。

Answer 3

这可能更容易做到：

Get-S3Object -BucketName ${BucketName} -Region ${RegionName} | Select-Object -First ${FileCount} | Copy-S3Object -LocalFolder ${WorkingDir}

从S3 bucket +文件夹下载文件

3 个答案: