(Swift 3,4,5...) GZip Create / Extract .gz File

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.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let gzip = CkoGzip()!

    // File-to-file GZip:
    // Compress "hamlet.xml" to create "hamlet.xml.gz"
    var success: Bool = gzip.compressFile("hamlet.xml", destPath: "hamlet.xml.gz")
    if success != true {
        print("\(gzip.lastErrorText!)")
        return
    }

    // File-to-file ungzip
    // Decompress "hamlet.xml.gz" to create "hamletOut.xml"
    success = gzip.uncompressFile("hamlet.xml.gz", destPath: "hamletOut.xml")
    if success != true {
        print("\(gzip.lastErrorText!)")
        return
    }

    // 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.
    var xmlStr: String?
    xmlStr = gzip.uncompressFile(to: "hamlet.xml.gz", inCharset: "utf-8")
    if success != true {
        print("\(gzip.lastErrorText!)")
        return
    }

    print("\(xmlStr!)")

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

}