Question

我有一个PowerShell脚本，可以下载特定文件扩展名的最新文件。 FTP目录中有数百个每小时带有时间戳的文件（mmddhh），它在每小时结束时清除。每个文件都有唯一的扩展名。我每小时都会为扩展程序.tn1，.tn2，.tn3，.tn4，.tn5，.ky1和.nc1下载文件

该文件在本地保存为extension.txt（例如tn1.txt，tn2.txt等。

我遇到的问题是，下载的tn5文件的创建日期为2015年12月，但在服务器上是最新的（2016年4月）。

我每次访问网页时都已将IE选项设置为“检查存储页面的较新版本”。

我正在从VBA执行脚本：

Shell("powershell ""H:\Worksheets\FTP\FTP.ps1""", vbHide)

try
{
    # Load WinSCP .NET assembly
    Add-Type -Path "C:\Program Files (x86)\WinSCP\WinSCPnet.dll"
    $localPath = "H:\Worksheets\FTP"
    $remotePath = "/outgoing/data/LatestData/"
    # Setup session options
    $sessionOptions = New-Object WinSCP.SessionOptions
    $sessionOptions.Protocol = [WinSCP.Protocol]::ftp
    $sessionOptions.HostName = 
    $sessionOptions.UserName = 
    $sessionOptions.Password = 

    $session = New-Object WinSCP.Session

    try
    {
        # Connect
        $session.Open($sessionOptions)

        # Get list of files in the directory
        $directoryInfo = $session.ListDirectory($remotePath)

        # Select the most recent file
        $latest = $directoryInfo.Files |
            Where-Object { -Not $_.IsDirectory} |
            Where-Object {
                [System.IO.Path]::GetExtension($_.Name) -eq ".nc1" -or
                [System.IO.Path]::GetExtension($_.Name) -eq ".ky1" -or
                [System.IO.Path]::GetExtension($_.Name) -like ".tn*" }

        Group-Object { [System.IO.Path]::GetExtension($_.Name) } | 
            ForEach-Object{ 
                $_.Group | Sort-Object LastWriteTime -Descending | Select -First 1
            }

        $extension = [System.IO.Path]::GetExtension($latest.Name)
        "GetExtension('{0}') returns '{1}'" -f $fileName, $extension 

        if ($latest -eq $Null)
        {
            Write-Host "No file found"
            exit 1
        }

        $latest | ForEach-Object{
            $extension = ([System.IO.Path]::GetExtension($_.Name)).Trim(".")
            $sourcePath = [WinSCP.RemotePath]::EscapeFileMask($remotePath + $_.Name)
            $session.GetFiles($sourcePath, "$localPath\$extension.txt" ).Check()
        }

        $stamp = $(Get-Date -f "yyyy-MM-dd-HHmm")
        $filename = $stamp.subString(0,$stamp.length-6)
        $session.GetFiles(
            ($remotePath + $fileName),
            ($localPath + $fileName + "." + $stamp)).Check()
    }
    finally
    {
        # Disconnect, clean up
        $session.Dispose()
    }

    exit 0
}
catch [Exception]
{
    Write-Host $_.Exception.Message
    exit 1
}

Answer 1

The target file name is specified by the second argument of the GetFiles method call, i.e. the "$localPath\$extension.txt" in the:

$sourcePath = [WinSCP.RemotePath]::EscapeFileMask($remotePath + $_.Name)
$session.GetFiles($sourcePath, "$localPath\$extension.txt").Check()

If you want to append a "1" to the basename, use "$localPath\${extension}1.txt":

$sourcePath = [WinSCP.RemotePath]::EscapeFileMask($remotePath + $_.Name)
$session.GetFiles($sourcePath, "$localPath\${extension}1.txt").Check()

Powershell WinSCP FTP脚本仅为8个文件中的1个下载缓存文件

1 个答案: