Xbase++

GZip Create / Extract .gz File

See more Gzip Examples

Demonstrates how to compress a file to create a .gz (GZip) file.

Note: The .gz file format is a compressed file format. It contains a single file. The .gz file format is not an archive format (i.e. it does not contain a collection of files/directories such as with the .zip, .rar, or .tar file formats). GZip is often combined with TAR to create a .tgz (or .tar.gz).

Note: It is possible for a .gz to contain more than one file, but this is very uncommon.

Xbase++

LOCAL nSuccess
LOCAL oGzip
LOCAL cXmlStr

nSuccess := 0

//  This example assumes the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

oGzip := CreateObject("Chilkat.Gzip")

//  File-to-file GZip:
//  Compress "hamlet.xml" to create "hamlet.xml.gz";
nSuccess := oGzip:CompressFile("hamlet.xml", "hamlet.xml.gz")
IF (nSuccess == 0)
    ? oGzip:LastErrorText
    oGzip:destroy()
    RETURN
ENDIF

//  File-to-file ungzip
//  Decompress "hamlet.xml.gz" to create "hamletOut.xml";
nSuccess := oGzip:UncompressFile("hamlet.xml.gz", "hamletOut.xml")
IF (nSuccess == 0)
    ? oGzip:LastErrorText
    oGzip:destroy()
    RETURN
ENDIF

//  File-to-string ungzip
//  Decompress the contents of a .gz directly to a string variable:
//  The 2nd argument indicates the charset of the character
//  data after it is decompressed.

cXmlStr := oGzip:UncompressFileToString("hamlet.xml.gz", "utf-8")
IF (nSuccess == 0)
    ? oGzip:LastErrorText
    oGzip:destroy()
    RETURN
ENDIF

? cXmlStr

//  The Chilkat GZip API provides much more flexibility than shown
//  here.  See the reference documentation at 
//  http://www.chilkatsoft.com/refdoc for more information.

oGzip:destroy()