ps12exe

0.6.11

src/Gzip.ps1

                                # 固定版本的内置纯 C# 7-Zip Deflate 编码器，仅编译期使用；不依赖原生程序或宿主压缩实现。

$script:GzipPackCodecType = $null

#_if PSEXE

    #_include_as_value gzipEncoderSource "$PSScriptRoot/programFrames/GzipEncode.cs"

    #_include_as_value gzipWrapperSource "$PSScriptRoot/programFrames/GzipWrapper.cs"

#_else

    [string]$gzipEncoderSource = Get-Content -LiteralPath "$PSScriptRoot/programFrames/GzipEncode.cs" -Raw -Encoding UTF8

    [string]$gzipWrapperSource = Get-Content -LiteralPath "$PSScriptRoot/programFrames/GzipWrapper.cs" -Raw -Encoding UTF8

#_endif

$gzipCodecKey = Get-TextHash ("$gzipEncoderSource|$gzipWrapperSource")

function Get-GzipPackCodecType {

    if ($script:GzipPackCodecType) { return $script:GzipPackCodecType }

    $key = $gzipCodecKey

    $typeName = "GzipPackCodec_$key"

    $loaded = Find-LoadedType $typeName

    if ($loaded) { $script:GzipPackCodecType = $loaded; return $loaded }

    [string]$cacheRoot = Get-CacheRoot 'gzip'

    Clear-StaleCache $cacheRoot

    # 编码流只由源码决定，DLL 缓存还区分宿主运行时。

    $runtimeKey = Get-TextHash ("$($PSVersionTable.PSEdition)|$($PSVersionTable.PSVersion)|$key")

    $encoderPath = Join-Path $cacheRoot "GzipEncode_$runtimeKey.cs"

    $wrapperPath = Join-Path $cacheRoot "GzipWrapper_$runtimeKey.cs"

    $dllPath = Join-Path $cacheRoot "gzip_$runtimeKey.dll"

    $mutex = [System.Threading.Mutex]::new($false, "ps12exe-gzip-$runtimeKey")

    $locked = $false

    try {

        try { $locked = $mutex.WaitOne(120000) } catch [System.Threading.AbandonedMutexException] { $locked = $true }

        if (-not $locked) { throw 'Timed out waiting for the bundled gzip encoder cache' }

        if (-not (Test-Path -LiteralPath $dllPath)) {

            [IO.File]::WriteAllText($encoderPath, $gzipEncoderSource, [Text.UTF8Encoding]::new($true))

            [IO.File]::WriteAllText($wrapperPath, ($gzipWrapperSource.Replace('GzipPackCodec', $typeName)), [Text.UTF8Encoding]::new($true))

            # 不回退到机器相关的编码器；加载失败必须显式失败。

            try { Add-Type -Path @($encoderPath, $wrapperPath) -OutputAssembly $dllPath -OutputType Library -ErrorAction Stop }

            catch { Remove-Item -LiteralPath $dllPath -Force -ErrorAction Ignore; throw }

        }

        [void][Reflection.Assembly]::LoadFrom($dllPath)

        $script:GzipPackCodecType = Find-LoadedType $typeName

        if (-not $script:GzipPackCodecType) { throw 'Bundled gzip encoder type was not loaded' }

        return $script:GzipPackCodecType

    }

    finally {

        if ($locked) { $mutex.ReleaseMutex() }

        $mutex.Dispose()

    }

}

function Compress-Gzip([byte[]]$Data) {

    $codec = Get-GzipPackCodecType

    return , ($codec.GetMethod('Compress').Invoke($null, @(, $Data)))

}