Powershell 格式化 FTPS 列表输出以获取最新的文件戳
Powershell format FTPS list output to get newest file stamp
为了监控写入远程 FTPS 服务器的备份，我能够在 Powershell 中从服务器请求文件列表。
但是，我不确定如何处理输出以便从最新文件中获取时间戳。
也许有更好的方法，但这是我目前的代码，输出如下。
# Create an FTPWebRequest object to handle the connection to the FTP server
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups"
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)
# Set the request's network credentials for an authenticated connection
$username = "admin" #Change username when done
$password = "xxx"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False
$ftpresponse = $ftprequest.GetResponse()
#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription
$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream()
$reader.ReadToEnd()
$reader.Close()
echo $reader
输出：
-rw-rw-rw- 1 admin users 137233604 Sep 30 13:41 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-30 13;36;52 (Full).zip
-rw-rw-rw- 1 admin users 138556255 Sep 30 19:48 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-30 19;36;18 (Full).zip
-rw-rw-rw- 1 admin users 139217601 Oct 1 00:12 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-10-01 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 698303741 Sep 3 00:05 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-03 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 699470009 Sep 4 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-04 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 700639919 Sep 5 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-05 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 698361150 Sep 6 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-06 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 699553508 Sep 7 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-07 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 700758345 Sep 8 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-08 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 698512347 Sep 9 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-09 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 699752013 Sep 10 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-10 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 701003563 Sep 11 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-11 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 698883380 Sep 12 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-12 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 700251730 Sep 13 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-13 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 701612056 Sep 14 00:08 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-14 00;00;04 (Full).zip
-rwxrwxrwx 1 admin users 79 Sep 14 00:15 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-14 00;14;59 (Full).zip
-rwxrwxrwx 1 admin users 137231884 Sep 14 07:38 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-14 07;35;22 (Full).zip
-rwxrwxrwx 1 admin users 138496696 Sep 14 14:59 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-14 14;55;24 (Full).zip
-rwxrwxrwx 1 admin users 136790964 Sep 15 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-15 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 138052042 Sep 16 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-16 00;00;04 (Full).zip
-rwxrwxrwx 1 admin users 139355293 Sep 17 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-17 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 137115162 Sep 18 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-18 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 138536791 Sep 19 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-19 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 139959405 Sep 20 00:04 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-20 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 137663847 Sep 21 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-21 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 138945285 Sep 22 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-22 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 140230350 Sep 23 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-23 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 137699171 Sep 24 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-24 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 138988930 Sep 25 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-25 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 140287732 Sep 26 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-26 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 137764807 Sep 27 00:04 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-27 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 139063256 Sep 28 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-28 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 140365349 Sep 29 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-29 00;00;03 (Full).zip
CurrentEncoding BaseStream EndOfStream
--------------- ---------- -----------
可以使用一个或多个连续空格作为分隔符，这将导致日期位于第 6 列（月）、第 7 列（天）和第 8 列（时间），但我不确定该怎么做，我不要认为这将是最好的解决方案，因为它会在输出更改后立即中断。
有什么想法吗？我真的只需要最新文件的日期时间戳，这样我就可以计算自上次备份以来的时间。获取数组中的输出会更好，因为我将来可以将该脚本用于其他目的。
希望你能帮助我。
-贾森
$reader.Split([char[]]"`n") |
ForEach-Object {, $_.Split([char[]]$null, [StringSplitOptions]::RemoveEmptyEntries)} |
ForEach-Object {"$($_[5..7])"}
可以通过正则表达式实现更多控制
$reader |
Select-String '\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec|Sep)\s(\d\d)\s(\d\d:\d\d)\s' -AllMatches |
ForEach-Object {$_.Matches} |
ForEach-Object {, ($_.Groups[1..3] | Select-Object -ExpandProperty Value)} |
ForEach-Object {$_[0] + ' ' + $_[1] + ' ' + $_[2]}
编辑： Andrei Odegov 使用新的正则表达式更新了他们的解决方案，因此我想提供基于该解决方案的变体而不是我之前的答案。
一旦您 $dirlist 似乎您正在采取可能不需要的额外步骤来实现您的目标。请尝试以下操作：
# Create an FTPWebRequest object to handle the connection to the FTP server
clear
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups"
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)
# Set the request's network credentials for an authenticated connection
$username = "admin" #Change username when done
$password = "xxx"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False
Remove-Variable ftpresponse
$ftpresponse = $ftprequest.GetResponse()
#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription
Remove-Variable reader
$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream()
$dirlist = $reader.ReadToEnd()
$reader.Close()
echo "raw output:"
$dirlist
$dateArray = $dirlist | Select-String -Pattern "((?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec|Sep)\s(s|\d)\d\s\d{2}:\d{2})" | % {$_.Matches} | % {[datetime]::parseexact($_.Value, 'MMM dd HH:mm', $null)} | Sort-Object
echo "DateTime Sorted:"
$dateArray
echo "Last file:"
$dateArray[-1]
Select-String 的结果可以在管道中转换为 [DateTime]，并在同一管道中使用 Sort-Object 进行排序，默认情况下按升序排序。
一旦到达最后一个文件，$array[-1] 将 return 数组中的最后一项，无需获取长度即可实现此目的。
在摆弄 Select 之后，我放弃并尝试了另一种方法。 （我一直收到关于正则表达式不正确的错误。）
使用 Andrei Odegov 的代码片段，我拆分了 $dirlist 并从文件名中选择了日期和时间，而不是实际的修改日期。为此，我删除了一些较旧的备份，以便所有文件在第 19 个和第 20 个对象上都有日期和时间。此日期包括年份，当存在超过一年的文件时可能会避免出现问题。
然后我把这些日期处理成$dateArray，然后排序，最后得到了一个不错的结果！
下面是最终代码，因为这个脚本的目的是获取自上次备份到我的 PRTG 网络监视器以来的时间（以分钟为单位），我也包含了该代码。
# Create an FTPWebRequest object to handle the connection to the FTP server
clear
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups" #Full path to folder
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)
# Set the request's network credentials for an authenticated connection
$username = "username"
$password = "password"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False
Remove-Variable ftpresponse
$ftpresponse = $ftprequest.GetResponse()
#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription
Remove-Variable reader
$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream()
$dirlist = $reader.ReadToEnd()
$reader.Close()
Remove-Variable rawdates
$rawdates = $dirlist.Split([char[]]"`n") |
ForEach-Object {, $_.Split([char[]]$null, [StringSplitOptions]::RemoveEmptyEntries)} |
ForEach-Object {"$($_[19..20])"}
Remove-Variable dateArray
foreach ($element in $rawdates){
$date = [datetime]::parseexact($element, 'yyyy-MM-dd HH;mm;ss', $null)
[DateTime[]]$dateArray += $date
}
[Array]::Sort($dateArray)
$dateArray[-1]
$DateNow = Get-Date
$DateDif = $DateNow - $dateArray[-1]
$DateDif.TotalMinutes
#Final output to PRTG (write-host VALUE:MESSAGE)
write-host $DateDif.TotalMinutes: Last backup executed at $dateArray[-1] which is ($DateDif.Days) days, ($DateDif.Hours) hours, ($DateDif.Minutes) minutes ago
感谢大家的贡献！
-贾森
为了监控写入远程 FTPS 服务器的备份，我能够在 Powershell 中从服务器请求文件列表。 但是，我不确定如何处理输出以便从最新文件中获取时间戳。
也许有更好的方法，但这是我目前的代码，输出如下。
# Create an FTPWebRequest object to handle the connection to the FTP server
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups"
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)
# Set the request's network credentials for an authenticated connection
$username = "admin" #Change username when done
$password = "xxx"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False
$ftpresponse = $ftprequest.GetResponse()
#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription
$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream()
$reader.ReadToEnd()
$reader.Close()
echo $reader
输出：
-rw-rw-rw- 1 admin users 137233604 Sep 30 13:41 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-30 13;36;52 (Full).zip
-rw-rw-rw- 1 admin users 138556255 Sep 30 19:48 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-30 19;36;18 (Full).zip
-rw-rw-rw- 1 admin users 139217601 Oct 1 00:12 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-10-01 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 698303741 Sep 3 00:05 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-03 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 699470009 Sep 4 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-04 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 700639919 Sep 5 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-05 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 698361150 Sep 6 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-06 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 699553508 Sep 7 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-07 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 700758345 Sep 8 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-08 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 698512347 Sep 9 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-09 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 699752013 Sep 10 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-10 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 701003563 Sep 11 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-11 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 698883380 Sep 12 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-12 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 700251730 Sep 13 00:06 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-13 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 701612056 Sep 14 00:08 HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-14 00;00;04 (Full).zip
-rwxrwxrwx 1 admin users 79 Sep 14 00:15 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-14 00;14;59 (Full).zip
-rwxrwxrwx 1 admin users 137231884 Sep 14 07:38 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-14 07;35;22 (Full).zip
-rwxrwxrwx 1 admin users 138496696 Sep 14 14:59 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-14 14;55;24 (Full).zip
-rwxrwxrwx 1 admin users 136790964 Sep 15 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-15 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 138052042 Sep 16 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-16 00;00;04 (Full).zip
-rwxrwxrwx 1 admin users 139355293 Sep 17 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-17 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 137115162 Sep 18 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-18 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 138536791 Sep 19 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-19 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 139959405 Sep 20 00:04 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-20 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 137663847 Sep 21 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-21 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 138945285 Sep 22 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-22 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 140230350 Sep 23 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-23 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 137699171 Sep 24 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-24 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 138988930 Sep 25 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-25 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 140287732 Sep 26 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-26 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 137764807 Sep 27 00:04 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-27 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 139063256 Sep 28 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-28 00;00;03 (Full).zip
-rwxrwxrwx 1 admin users 140365349 Sep 29 00:03 OpenVPN + HTDOCS + Apache conf+ exported databases backup to NAS01 2017-09-29 00;00;03 (Full).zip
CurrentEncoding BaseStream EndOfStream
--------------- ---------- -----------
可以使用一个或多个连续空格作为分隔符，这将导致日期位于第 6 列（月）、第 7 列（天）和第 8 列（时间），但我不确定该怎么做，我不要认为这将是最好的解决方案，因为它会在输出更改后立即中断。
有什么想法吗？我真的只需要最新文件的日期时间戳，这样我就可以计算自上次备份以来的时间。获取数组中的输出会更好，因为我将来可以将该脚本用于其他目的。
希望你能帮助我。
-贾森
$reader.Split([char[]]"`n") |
ForEach-Object {, $_.Split([char[]]$null, [StringSplitOptions]::RemoveEmptyEntries)} |
ForEach-Object {"$($_[5..7])"}
可以通过正则表达式实现更多控制
$reader |
Select-String '\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec|Sep)\s(\d\d)\s(\d\d:\d\d)\s' -AllMatches |
ForEach-Object {$_.Matches} |
ForEach-Object {, ($_.Groups[1..3] | Select-Object -ExpandProperty Value)} |
ForEach-Object {$_[0] + ' ' + $_[1] + ' ' + $_[2]}
编辑： Andrei Odegov 使用新的正则表达式更新了他们的解决方案，因此我想提供基于该解决方案的变体而不是我之前的答案。
一旦您 $dirlist 似乎您正在采取可能不需要的额外步骤来实现您的目标。请尝试以下操作：
# Create an FTPWebRequest object to handle the connection to the FTP server
clear
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups"
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)
# Set the request's network credentials for an authenticated connection
$username = "admin" #Change username when done
$password = "xxx"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False
Remove-Variable ftpresponse
$ftpresponse = $ftprequest.GetResponse()
#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription
Remove-Variable reader
$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream()
$dirlist = $reader.ReadToEnd()
$reader.Close()
echo "raw output:"
$dirlist
$dateArray = $dirlist | Select-String -Pattern "((?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec|Sep)\s(s|\d)\d\s\d{2}:\d{2})" | % {$_.Matches} | % {[datetime]::parseexact($_.Value, 'MMM dd HH:mm', $null)} | Sort-Object
echo "DateTime Sorted:"
$dateArray
echo "Last file:"
$dateArray[-1]
Select-String 的结果可以在管道中转换为 [DateTime]，并在同一管道中使用 Sort-Object 进行排序，默认情况下按升序排序。
一旦到达最后一个文件，$array[-1] 将 return 数组中的最后一项，无需获取长度即可实现此目的。
在摆弄 Select 之后，我放弃并尝试了另一种方法。 （我一直收到关于正则表达式不正确的错误。）
使用 Andrei Odegov 的代码片段，我拆分了 $dirlist 并从文件名中选择了日期和时间，而不是实际的修改日期。为此，我删除了一些较旧的备份，以便所有文件在第 19 个和第 20 个对象上都有日期和时间。此日期包括年份，当存在超过一年的文件时可能会避免出现问题。
然后我把这些日期处理成$dateArray，然后排序，最后得到了一个不错的结果！
下面是最终代码，因为这个脚本的目的是获取自上次备份到我的 PRTG 网络监视器以来的时间（以分钟为单位），我也包含了该代码。
# Create an FTPWebRequest object to handle the connection to the FTP server
clear
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups" #Full path to folder
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)
# Set the request's network credentials for an authenticated connection
$username = "username"
$password = "password"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False
Remove-Variable ftpresponse
$ftpresponse = $ftprequest.GetResponse()
#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription
Remove-Variable reader
$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream()
$dirlist = $reader.ReadToEnd()
$reader.Close()
Remove-Variable rawdates
$rawdates = $dirlist.Split([char[]]"`n") |
ForEach-Object {, $_.Split([char[]]$null, [StringSplitOptions]::RemoveEmptyEntries)} |
ForEach-Object {"$($_[19..20])"}
Remove-Variable dateArray
foreach ($element in $rawdates){
$date = [datetime]::parseexact($element, 'yyyy-MM-dd HH;mm;ss', $null)
[DateTime[]]$dateArray += $date
}
[Array]::Sort($dateArray)
$dateArray[-1]
$DateNow = Get-Date
$DateDif = $DateNow - $dateArray[-1]
$DateDif.TotalMinutes
#Final output to PRTG (write-host VALUE:MESSAGE)
write-host $DateDif.TotalMinutes: Last backup executed at $dateArray[-1] which is ($DateDif.Days) days, ($DateDif.Hours) hours, ($DateDif.Minutes) minutes ago
感谢大家的贡献！
-贾森