PowerShell Skript zum Auslesen von PDF und anschließendem Löschen des gesamten Ordners

# ------------------------------------------------------
# Pfad in dem die PDFs liegen
$pdfquelle = "$PSScriptRoot\pdf"  
# Suchbegriff
$searchterm = 'Musterstraße 7'  
# ------------------------------------------------------

# Mindestens PS 3.0 erforderlich
if ($PSVersionTable.PSVersion.Major -lt 3){write-host "ERROR: Minimum Powershell Version 3.0 is required!" -F Yellow; return}    

# Funktion zum Laden des iTextSharp Assemblies
function Load-iTextLibrary {
    if($psscriptroot -ne ''){  
        $localpath = join-path $psscriptroot 'itextsharp.dll'  
    }else{
        $localpath = join-path $env:TEMP 'itextsharp.dll'  
    }
    $zip = $null;$tmp = ''  
    try{
        if(!(Test-Path $localpath)){
            Add-Type -A System.IO.Compression.FileSystem
            $tmp = "$env:TEMP\$([IO.Path]::GetRandomFileName())"  
            write-host "Downloading and extracting required 'iTextSharp.dll' ... " -F Green -NoNewline  

            (New-Object System.Net.WebClient).DownloadFile('https://www.nuget.org/api/v2/package/iTextSharp/5.5.13.1', $tmp)  
            $zip = [System.IO.Compression.ZipFile]::OpenRead($tmp)
            $zip.Entries | ?{$_.Fullname -eq 'lib/itextsharp.dll'} | %{  
                [System.IO.Compression.ZipFileExtensions]::ExtractToFile($_,$localpath)
            }
            write-host "OK" -F Green   
        }
        if (Get-Item $localpath -Stream zone.identifier -ea SilentlyContinue){
            Unblock-File -Path $localpath
        }
        Add-Type -Path $localpath
    }catch{
        throw "Error: $($_.Exception.Message)"  
    }finally{
        if ($zip){$zip.Dispose()}
        if ($tmp -ne ''){del $tmp -Force -EA SilentlyContinue}  
    }
}
# iText Library laden
Load-iTextLibrary

# auch geschütze PDFs öffnen aktivieren
[iTextSharp.text.pdf.PdfReader]::unethicalreading = $true

ls $pdfquelle -Directory -Recurse | ?{
    $result = $false
    foreach($pdf in (ls $_.Fullname -Filter *.pdf -File)){
        $reader = $null  
        try {
            $reader = New-Object iTextSharp.text.pdf.PdfReader $pdf.Fullname
            for($i = 1 ;$i -le $reader.NumberOfPages;$i++){
                if ([iTextSharp.text.pdf.parser.PdfTextExtractor]::GetTextFromPage($reader,$i) -like "*$searchterm*"){  
                   $result = $true
                   break
                }
            }
        }catch{
            $result = $false
        }finally{
            if($reader){$reader.Dispose()}
        }
        if($result){break}
    }
    $result
} | sort {$_.Fullname.length} -Desc | del -Force -Recurse -Verbose

# ------------------------------------------------------
# Pfad in dem die PDFs liegen
$pdfquelle = "$PSScriptRoot\pdf"  
# Suchbegriff
$searchterm = 'Musterstraße 7'  
# ------------------------------------------------------

# Mindestens PS 3.0 erforderlich
if ($PSVersionTable.PSVersion.Major -lt 3){write-host "ERROR: Minimum Powershell Version 3.0 is required!" -F Yellow; return}    

# Funktion zum Laden des iTextSharp Assemblies
function Load-iTextLibrary {
    if($psscriptroot -ne ''){  
        $localpath = join-path $psscriptroot 'itextsharp.dll'  
    }else{
        $localpath = join-path $env:TEMP 'itextsharp.dll'  
    }
    $zip = $null;$tmp = ''  
    try{
        if(!(Test-Path $localpath)){
            Add-Type -A System.IO.Compression.FileSystem
            $tmp = "$env:TEMP\$([IO.Path]::GetRandomFileName())"  
            write-host "Downloading and extracting required 'iTextSharp.dll' ... " -F Green -NoNewline  

            (New-Object System.Net.WebClient).DownloadFile('https://www.nuget.org/api/v2/package/iTextSharp/5.5.13.1', $tmp)  
            $zip = [System.IO.Compression.ZipFile]::OpenRead($tmp)
            $zip.Entries | ?{$_.Fullname -eq 'lib/itextsharp.dll'} | %{  
                [System.IO.Compression.ZipFileExtensions]::ExtractToFile($_,$localpath)
            }
            write-host "OK" -F Green   
        }
        if (Get-Item $localpath -Stream zone.identifier -ea SilentlyContinue){
            Unblock-File -Path $localpath
        }
        Add-Type -Path $localpath
    }catch{
        throw "Error: $($_.Exception.Message)"  
    }finally{
        if ($zip){$zip.Dispose()}
        if ($tmp -ne ''){del $tmp -Force -EA SilentlyContinue}  
    }
}
# iText Library laden
Load-iTextLibrary

# auch geschütze PDFs öffnen aktivieren
[iTextSharp.text.pdf.PdfReader]::unethicalreading = $true

# Funktion zum beschleunigen vom Skriptblocks (runspaces mnultithreading)
function %% {
    [CmdletBinding()]
    param(
        [parameter(mandatory=$true,ValueFromPipeline=$true)][ValidateNotNullOrEmpty()][object[]]$InputObject,
        [parameter(mandatory=$true)][ValidateNotNullOrEmpty()][scriptblock]$Process,
        [parameter(mandatory=$false)][ValidateNotNullOrEmpty()][int]$ThrottleLimit = [System.Environment]::ProcessorCount,
        [parameter(mandatory=$true)][ValidateNotNullOrEmpty()][switch]$showprogress
        
    )
    begin{
        $rspool = [runspacefactory]::CreateRunspacePool(1,$ThrottleLimit)
        $rspool.ApartmentState = 'STA'  
        $rspool.Open()
        $jobs = New-Object System.Collections.ArrayList
        $objects = New-Object System.Collections.ArrayList
    }
    process{
        $InputObject | %{[void]$objects.Add($_)}
    }
    end{
        foreach ($obj in $objects){
            $ps = [Powershell]::Create()
            $ps.RunspacePool = $rspool
            [void]$ps.AddScript($Process).AddParameter('_',$obj)  
            $job = $ps.BeginInvoke()
            [void]$jobs.Add(([pscustomobject]@{Handle = $job; Powershell = $ps}))
        }

        write-verbose "Waiting for all jobs to complete."  
        while(($jobs | ?{!$_.Handle.IsCompleted})){
            if ($showprogress.IsPresent){
                $completed = ($jobs | ?{$_.Handle.IsCompleted}).Count
                Write-Progress -Activity $PSCmdlet.MyInvocation.InvocationName -Status "Pinging a total of $($objects.Count) hosts." -PercentComplete (($completed / $objects.Count) * 100) -CurrentOperation "Completed $completed from $($objects.Count)."  
            }
        }
        # get results of jobs
        $results = $jobs | %{
            $_.Powershell.EndInvoke($_.handle)
            $_.Powershell.Dispose()
        }
        # cleanup
        $rspool.Close();$rspool.Dispose()
        $results
    }
}


ls $pdfquelle -Directory -Recurse | %% -ThrottleLimit 8 -showprogress -Process {
    param($_)
    $result = $false
    foreach($pdf in (ls $_.Fullname -Filter *.pdf -File)){
        $reader = $null  
        try {
            $reader = New-Object iTextSharp.text.pdf.PdfReader $pdf.Fullname
            for($i = 1 ;$i -le $reader.NumberOfPages;$i++){
                if ([iTextSharp.text.pdf.parser.PdfTextExtractor]::GetTextFromPage($reader,$i) -like "*$searchterm*"){  
                   $result = $true
                   break
                }
            }
        }catch{
            $result = $false
        }finally{
            if($reader){$reader.Dispose()}
        }
        if($result){
            $pdf.Directory
            break
        }
    }

} | sort {$_.Fullname.length} -Desc | del -Force -Recurse -Verbose