在 PowerShell 中使用 WinSCP 仅下载新文件

Question

我如何下载最新的文件或发布了一定天数的文件？ 导入包含Source和Destination列的 CSV 文件。 需要检查路径是否存在/文件是否存在并且只下载新文件。

脚本现在正在将所有文件移动到相应的文件夹 - 但是一旦我再次运行脚本，它就不会只下载新文件。

以下是 CSV 文件的示例：

try{

  Add-Type -Path "WinSCPnet.dll"
  # Setup session options
  $sessionOptions = New-Object WinSCP.SessionOptions -Property @{
    Protocol = [WinSCP.Protocol]::sftp
    HostName = "xxxxx"
    UserName = "xxxxr"
    Password = "xxxxxxx"
    PortNumber = "xx"
    GiveUpSecurityAndAcceptAnySshHostKey = $true
  }

  $session = New-Object WinSCP.Session

  try{
    # Connect
    $session.Open($sessionOptions)
    # Download files
    $transferOptions = New-Object WinSCP.TransferOptions
    $transferOptions.TransferMode = [WinSCP.TransferMode]::Binary

    Import-Csv -Path "C:\movefiles.csv" -ErrorAction Stop | foreach{

      Write-Host $_.Source
      Write-host $_.Destination 

      $transferResult =
        $session.GetFiles($_.Source, $_.Destination, $False, $transferOptions)

      # Throw on any error
      $transferResult.Check()

      # Print results
      $smtpBody = ""
      foreach ($transfer in $transferResult.Transfers){

        Write-Host "Download of $($transfer.FileName) succeeded"

        $smtpbody += " Files : ( $transfer.filename - join ', ')" +
                     " Current location: $($_.Destination) "
      } 

      Send-Mail Message @smtpMessage  -Body $smtpbody
    }
    finally {
      # Disconnect, clean up
      $session.Dispose()
    }
  }
  catch
  {
    Write-Host "Error: $($_.Exception.Message)"
  }
}

CSV 文件示例：

Source, Destination
/client1/Business/2019, C:\test\test1
/client2/Reporting/2018, C:\test\test2

Answer 1

如果您的Source和Destination是普通目录路径，您可以简单地将Session.GetFiles替换为Session.SynchronizeDirectories ：

Import-Csv -Path "C:\movefiles.csv" -ErrorAction Stop | foreach {

    $synchronizationResult = $session.SynchronizeDirectories(
        [WinSCP.SynchronizationMode]::Local, $_.Destination, $_.Source, $False)

    $synchronizationResult.Check()

    foreach ($download in $synchronizationResult.Downloads)
    {
        Write-Host "File $($download.FileName) downloaded"
    }
}

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另请参阅 WinSCP 常见问题解答如何仅传输新的/修改过的文件？