Expand-Data.ps1
|
function Expand-Data { <# .Synopsis Expands Compressed Data .Description Expands Compressed Data using the .NET GZipStream class .Link Compress-Data .Link http://msdn.microsoft.com/en-us/library/system.io.compression.gzipstream.aspx .Example Compress-Data -String ("abc" * 1kb) | Expand-Data #> [CmdletBinding(DefaultParameterSetName='BinaryData')] [OutputType([string],[byte])] param( # The compressed data, as a Base64 string [Parameter(ValueFromPipelineByPropertyName=$true,ValueFromPipeline=$true,Position=0,ParameterSetName='CompressedData')] [string] $CompressedData, # The compressed data, as a byte array [Parameter(ValueFromPipelineByPropertyName=$true,ValueFromPipeline=$true,Position=0,ParameterSetName='BinaryData')] [Byte[]] $BinaryData, # The type of data the decompressed object will be (a string or a byte array) [ValidateSet('String', 'Byte')] [string] $As = 'String' ) process { #region Open Data if ($psCmdlet.ParameterSetName -eq 'CompressedData') { try { $binaryData = [System.Convert]::FromBase64String($CompressedData) } catch { Write-Verbose "Unable to uncompress base 64 string" return } } $ms = New-Object System.IO.MemoryStream $ms.Write($binaryData, 0, $binaryData.Length) $ms.Seek(0,0) | Out-Null $cs = New-Object System.IO.Compression.GZipStream($ms, [IO.Compression.CompressionMode]"Decompress") #endregion Open Data #region Compress And Render if ($as -eq 'string') { $sr = New-Object System.IO.StreamReader($cs) $sr.ReadToEnd() } else { $bytes = do { $byte = $cs.ReadByte() if ($byte -ne -1) { [Byte]$byte } else { break } } while ($byte -ne 1) $bytes -as [byte[]] } #endregion Compress And Render } } |