Unzip GZ files using Powershell

Question

I have  Windows 2008 Server with some GZ type files in a folder. I would like to script unzipping them using Powershell, can someone tell me if this is possible and how I would do it?
The folder is d:\data_files\ and I'd like to uncompress all the .gz files in there
I've searched around on the Net but can't find much that deals with GZ files specifically. The files are all named data-1.gz, data-2.gz etc
Hello
I have  Windows 2008 Server with some GZ type files in a folder. I would like to script unzipping them using Powershell, can someone tell me if this is possible and how I would do it?
The folder is d:\data_files\ and I'd like to uncompress all the .gz files in there
I've searched around on the Net but can't find much that deals with GZ files specifically.

Answer 1

I also found that .Net 2.0 and above has native code for dealing with gzip files.
Function DeGZip-File{
Param(
$infile,
$outfile = ($infile -replace '\.gz$','')
$input = New-Object System.IO.FileStream $inFile, ([IO.FileMode]::Open), ([IO.FileAccess]::Read), ([IO.FileShare]::Read)
$output = New-Object System.IO.FileStream $outFile, ([IO.FileMode]::Create), ([IO.FileAccess]::Write), ([IO.FileShare]::None)
$gzipStream = New-Object System.IO.Compression.GzipStream $input, ([IO.Compression.CompressionMode]::Decompress)
$buffer = New-Object byte[](1024)
while($true){
$read = $gzipstream.Read($buffer, 0, 1024)
if ($read -le 0){break}
$output.Write($buffer, 0, $read)
$gzipStream.Close()
$output.Close()
$input.Close()
$infile='C:\Temp\DECfpc1new.csv.gz'
$outfile='c:\temp\DECfpc1new.csv'
DeGZip-File $infile $outfile
You can supply the function with the full path of the file to be unzipped, and the full path of the unzipped file.
If you don't supply the unzipped file path, the function will unzip the file into the same folder as the source, and remove the .gz extension.
Inspired by Heineken.