嵌套的zip內容串列

我一直在做一個小專案，列出壓縮在嵌套 zip 檔案中的檔案。我已經撰寫了一個可以做到這一點的腳本，但前提是 zip 檔案的深度是已知的。在下面的示例中，zip 檔案中有額外的 zip，然后在其中一個中添加。

Add-Type -AssemblyName System.IO.Compression.Filesystem
$path = "PATH"
$CSV_Path = "CSV_PATH"
$zipFile = Get-ChildItem $path -recurse -Filter "*.zip"
$rootArchive = [System.IO.Compression.zipfile]::OpenRead($zipFile.fullname)
$rootArchive.Entries | Select @{l = 'Source Zip'; e = {} }, @{l = "FullName"; e = { $_.FullName.Substring(0, $rootArchive.Fullname.Lastindexof('\')) } }, Name | Export-csv $CSV_Path -notypeinformation

$archivesLevel2 = $rootArchive.Entries | Where { $_.Name -like "*.zip" } 
foreach ($archive in $archivesLevel2)
{
    (New-object System.IO.Compression.ZipArchive ($archive.Open())).Entries | Select @{l = 'Source Zip'; e = { $archive.name } }, @{l = "FullName"; e = { $archive.FullName.Substring(0, $_.Fullname.Lastindexof('\')) } }, Name | Export-Csv $CSV_Path -NoTypeInformation -append;
    New-object System.IO.Compression.ZipArchive($archive.Open()) -OutVariable  lastArchiveLevel2
}

$archivesLevel3 = $lastArchiveLevel2.entries | Where { $_.Name -like "*.zip" }
foreach ($archive in $archivesLevel3) 
{
    (New-Object System.IO.Compression.ZipArchive ($archive.Open())).Entries | Select @{l = 'Source Zip'; e = { $archive.name } }, @{l = "FullName"; e = { $archive.FullName.Substring(0, $_.Fullname.Lastindexof('\')) } }, Name | Export-Csv $CSV_Path -NoTypeInformation -append
}

我要求你幫助我修改它以適應未知深度的內部 zip 檔案。這甚至可能嗎？

uj5u.com熱心網友回復：

這是一個關于如何使用 Queue 物件執行此操作的示例，它允許您一次遞回地遍歷 zip 檔案的所有深度。

根據要求，這里有一些評論來解釋發生了什么。

Add-Type -AssemblyName System.IO.Compression.Filesystem
$path = "PATH"
$CSV_Path = "CSV_PATH"
$Queue = [System.Collections.Queue]::New()
$zipFiles = Get-ChildItem $path -recurse -Filter "*.zip"

# All records will be stored here
$Output = [System.Collections.Generic.List[PSObject]]::new()

# Main logic. Used when looking at the root zip and any zip entries.
# ScriptBlock is used to prevent code duplication.
$ProcessEntries = {
    Param($Entries)
    $Entries | % {
        # Put all zip in the queue for future processing
        if ([System.IO.Path]::GetExtension($entry) -eq '.zip') { $Queue.Enqueue($_) }
        # Add a Source Zip property with the parent zip since we want this informations in the csv export and it is not available otherwise.
        $_ | Add-Member -MemberType NoteProperty -Name 'Source Zip' -Value $zip.name
        # Every entries, zip or not, need to be part of the output
        $output.Add($_) 
    }
}

# Your initial Get-ChildItem to find zip file implicate there could be multiple root zip files, so a loop is required.
Foreach ($zip in $zipFiles) {
    $archive = [System.IO.Compression.zipfile]::OpenRead($zip.fullname)
    # The $ProcessEntries scriptblock is invoked to fill the Queue and the output.
    . $ProcessEntries $archive.Entries
    
    # Should the Zip file have no zip entries, this loop will never be entered.
    # Otherwise, the loop will continue as long as zip entries are detected while processing any child zip.
    while ($Queue.Count -gt 0) {
        # Removing item from the queue to avoid reprocessing it again.
        $Item = $Queue.Dequeue()
        $archive = New-object System.IO.Compression.ZipArchive ($Item.open())
        # We call the main scriptblock again to fill the queue and the output.
        . $ProcessEntries $archive.Entries
        
    }

}

$Output | Select 'Source Zip', FullName, Name | Export-Csv $CSV_Path -NoTypeInformation

參考

佇列

uj5u.com熱心網友回復：

在這里，您有一個遞回的小例子，基本上，您遍歷 的.Entries屬性ZipFile并檢查每個專案的擴展名是否為.zip，如果是，則將該條目傳遞給您的函式。

編輯：取消洗掉這個答案主要是為了展示如何使用遞回函式來解決這個問題，我之前的答案是不準確的。我[ZipFile]::OpenRead(..)用來讀取.zip在 Linux (.NET Core) 上似乎可以正常作業的嵌套檔案，但是在使用 Windows PowerShell 時它顯然不起作用。正確的方法是使用[ZipArchive]::new($nestedZip.Open())Sage Pourpre 的有用答案顯示。

using namespace System.IO
using namespace System.IO.Compression

function Get-ZipFile {
[cmdletbinding()]
param(
    [parameter(ValueFromPipeline)]
    [object]$Path,
    [parameter(DontShow)]
    [int]$Nesting = -1
)
    begin { $Nesting   }
    process {
        try
        {
            $zip = if(-not $Nesting) {
                [ZipFile]::OpenRead($Path)
            }
            else {
                [ZipArchive]::new($Path.Open())
            }
            foreach($entry in $zip.Entries) {
                [pscustomobject]@{
                    Nesting = $Nesting
                    Parent = $Path.Name
                    Contents = $entry.FullName
                }
                if([Path]::GetExtension($entry) -eq '.zip') {
                    Get-ZipFile -Path $entry -Nesting $Nesting
                }
            }
        }
        catch
        {
            $PSCmdlet.WriteError($_)
        }
        finally
        {
            if($null -ne $zip) {
                $zip.Dispose()
            }
        }
    }
}

Get-ChildItem *.zip | Get-ZipFile

標籤：电源外壳 递归 前锋 嵌套的 压缩

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