public/ConvertFrom-Base64Compressed.ps1
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function ConvertFrom-Base64Compressed { <# .SYNOPSIS Convert string from Base64 compressed to ASCII .DESCRIPTION Convert a Base64 encoded string to ASCII .PARAMETER String Required. Base64 compressed text string to convert. .EXAMPLE $x = "this is a test string" | ConvertTo-Base64Compressed returns "H4sIAAAAAAAEACvJyCxWAKJEhZLU4hKF4pKizLx0ALXWhvwVAAAA" $x | ConvertFrom-Base64Compressed Returns "this is a test string" .LINK https://github.com/Skatterbrainz/ds-utils/blob/master/docs/ConvertFrom-Base64Compressed.md #> [CmdletBinding()] param ( [parameter(Mandatory=$true,ValueFromPipeline=$true)][ValidateNotNullOrEmpty()]$EncodedText ) begin {} process { $data = [System.Convert]::FromBase64String($EncodedText) $compressedStream = [System.IO.MemoryStream]::new($data) $zipStream = [System.IO.Compression.GZipStream]::new($compressedStream, [System.IO.Compression.CompressionMode]::Decompress) $resultStream = [System.IO.MemoryStream]::new() $buffer = [System.Byte[]]::CreateInstance([System.Byte],4096) while (($read = $zipStream.Read($buffer, 0, $buffer.Length)) -gt 0){ $resultStream.Write($buffer, 0, $read) } $decompressed = $resultStream.ToArray() [System.Text.Encoding]::UTF8.GetString($decompressed, 0, $decompressed.Length) } end {} } |