Tuesday, December 2, 2014

PowerShell compression \ decompression

I needed a minimal foot print for one of my previous powershell unmanaged declaration,

$s = @'YourInputHere"@
$ms = New-Object System.IO.MemoryStream
$cs = New-Object System.IO.Compression.GZipStream($ms, [System.IO.Compression.CompressionMode]::Compress)
$sw = New-Object System.IO.StreamWriter($cs)
$s = [System.Convert]::ToBase64String($ms.ToArray())

$data = [System.Convert]::FromBase64String("CompressedBase64StreamHere")
$ms = New-Object System.IO.MemoryStream
$ms.Write($data, 0, $data.Length)
$ms.Seek(0,0) | Out-Null
$sr = New-Object System.IO.StreamReader(New-Object System.IO.Compression.GZipStream($ms, [System.IO.Compression.CompressionMode]::Decompress))

I manage to get 50% decreasse on a small input stream...nice!

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