(Visual FoxPro) Extract a .tar.gz Archive to a Directory

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This example demonstrates how to use the UnTarGz method to extract a .tar.gz archive to a specified directory.

The method performs both the Gzip decompression and TAR extraction in a single step. It operates in streaming mode, meaning it does not create temporary files and uses a constant, minimal amount of memory regardless of archive size.

The bNoAbsolute parameter is set to cktrue in this example to prevent extraction of files with absolute paths. This is a safety measure that helps avoid overwriting files in unintended locations (such as system directories).

This method is ideal for efficiently extracting large .tar.gz archives while maintaining security and low memory usage.

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LOCAL lnSuccess
LOCAL loGzip
LOCAL lcTgzPath
LOCAL lcDestDir
LOCAL lnNoAbsolute

lnSuccess = 0

* This example demonstrates how to extract a .tar.gz archive to a directory.

loGzip = CreateObject('Chilkat.Gzip')

* The .tar.gz file to be extracted:
lcTgzPath = "c:/temp/archive.tar.gz"

* The destination directory:
lcDestDir = "c:/temp/outputDir"

* Set to 1 to prevent extraction of files with absolute paths:
lnNoAbsolute = 1

* Extract the archive:
lnSuccess = loGzip.UnTarGz(lcTgzPath,lcDestDir,lnNoAbsolute)
IF (lnSuccess = 0) THEN
    ? loGzip.LastErrorText
    RELEASE loGzip
    CANCEL
ENDIF

? "Archive successfully extracted to: " + lcDestDir

RELEASE loGzip