Private/Expand-GzipArchive.ps1
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Function Expand-GzipArchive { [CmdletBinding(SupportsShouldProcess = $false)] param ( [Parameter(Mandatory = $true, Position = 0)] [ValidateNotNullOrEmpty()] [ValidateScript( { if (Test-Path -Path $_ -PathType "Leaf") { $true } else { throw "Cannot find path $_." } })] [System.String] $Path, [Parameter(Mandatory = $false, Position = 1)] [ValidateNotNullOrEmpty()] [ValidateScript( { if (Test-Path -Path $(Split-Path -Path $_ -Parent) -PathType "Container") { $true } else { throw "Cannot find path $(Split-Path -Path $_ -Parent)." } })] [System.String] $DestinationPath = ($Path -replace "\.gz$", ""), [Parameter()] [System.Int32] $BufferSize = 1024 ) try { # Create the input stream to read the archive Write-Verbose -Message "$($MyInvocation.MyCommand): Create input file stream." $InputStream = New-Object -TypeName "System.IO.FileStream" $Path, ` ([System.IO.FileMode]::Open), ([System.IO.FileAccess]::Read), ` ([System.IO.FileShare]::Read) # Create the output stream object Write-Verbose -Message "$($MyInvocation.MyCommand): Create output file stream." $OutputStream = New-Object -TypeName "System.IO.FileStream" $DestinationPath, ` ([System.IO.FileMode]::Create), ([System.IO.FileAccess]::Write), ` ([System.IO.FileShare]::None) # Create the Gzip stream to expand the archive Write-Verbose -Message "$($MyInvocation.MyCommand): Create Gzip stream." $GzipStream = New-Object -TypeName "System.IO.Compression.GzipStream" $InputStream, ` ([System.IO.Compression.CompressionMode]::Decompress) } catch { throw "$($MyInvocation.MyCommand): $($_.Exception.Message)." } # Expand the archive if ($null -ne $GzipStream) { try { Write-Verbose -Message "$($MyInvocation.MyCommand): Attempt expand: $DestinationPath." $buffer = New-Object -TypeName System.Byte[] -ArgumentList $BufferSize while ($true) { $read = $GzipStream.Read($buffer, 0, $BufferSize) if ($read -le 0) { break } $OutputStream.Write($buffer, 0, $read) } } catch { throw "$($MyInvocation.MyCommand): $($_.Exception.Message)." } finally { # Close the streams $GzipStream.Close() $InputStream.Close() $OutputStream.Close() Write-Verbose -Message "$($MyInvocation.MyCommand): Successfully expanded: $DestinationPath." Write-Output -InputObject $DestinationPath } } } |