从 FTP 服务器下载名称包含特定字符串的文件

Question

我对 PowerShell 没有经验，我需要帮助才能从 FTP 服务器下载多个名称相似的图像。 我在这个论坛里找了很多，我只下载了一张图片。 为此，我必须输入文件名。

我想选择一个日期，然后下载具有该日期的所有图片并将它们保存在本地文件夹中。 我还想将下载的图像的名称保存在 .txt 文件中

那么如何根据日期下载图片呢？

字符串20201009是日期和它后面的数字是连续的。

我希望你明白我的意思，因为这是我第一次在论坛上写东西

$UserName = "abc"
$Password = "abc"

$RemoteFileName =  "DatenTestKam3_schlecht_20201009_085248_00848.jpg"
$LocalFilePath = "C:\Users\Desktop\PowerShell\$RemoteFileName"

$ServerName = "10.196.195.167/22_test"

$webclient = New-Object System.Net.WebClient

$webclient.Credentials = New-Object System.Net.NetworkCredential($UserName, $Password)

$uri = New-Object System.Uri(“ftp://$ServerName/$RemoteFileName”)

$webclient.DownloadFile($uri, $LocalFilePath)

Answer 1

如果我正确理解您的问题，您想下载名称包含“20201009”字符串的所有文件，对吗？

$url = "ftp://ftp.example.com/remote/path/"
$credentials = New-Object System.Net.NetworkCredential("username", "password")
$request = [System.Net.WebRequest]::Create($url)
$request.Credentials = $credentials
$request.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectory
$response = $request.GetResponse()
$reader = New-Object IO.StreamReader $response.GetResponseStream() 
$listing = $reader.ReadToEnd()
$reader.Close()
$response.Close()

$localpath = "C:\Users\Desktop\PowerShell"
$date = "20201009"
$files =
    ($listing -split "`r`n") |
    Where-Object {$_ -like "*$date*"}

$webclient = New-Object System.Net.WebClient 
$webclient.Credentials = $credentials

foreach ($file in $files)
{
    $localfilepath = (Join-Path $localPath $file)
    Write-Host ($file + " => " + $localfilepath)

    $webclient.DownloadFile(($url + $file), $localfilepath)
}

---

如果您使用WinSCP .NET 程序集，那就更容易了：

Add-Type -Path "WinSCPnet.dll"

$sessionOptions = New-Object WinSCP.SessionOptions -Property @{
    Protocol = [WinSCP.Protocol]::Ftp
    HostName = "ftp.example.com"
    UserName = "username"
    Password = "password"
}

$session = New-Object WinSCP.Session

$session.Open($sessionOptions)

$localpath = "C:\Users\Desktop\PowerShell"
$date = "20201009"
$session.GetFilesToDirectory("/remote/path", $localpath, "*$date*").Check()

$session.Dispose()

（我是 WinSCP 的作者）