Append Files to Existing Zip w/out Rewriting Entire Zip

Demonstrates how to use the QuickAppend method to append files to an existing .zip archive. This method works by editing the existing .zip -- it does not rewrite or recompress the contents of the existing .zip. It is the fastest way to append additional files to a pre-existing large .zip archive. Note: The QuickAppend method is new and available in the pre-release downloads, or in official releases dated after 6-October-2007.

Chilkat Module for Perl 5.8.*

Chilkat Module for Perl 5.10.*

use chilkat;

$zip = new chilkat::CkZip();

#  Any string unlocks the component for the 1st 30-days.
$success = $zip->UnlockComponent("Anything for 30-day trial");
if ($success != 1) {
    print $zip->lastErrorText() . "\n";
    exit;
}

#  The NewZip method only initializes the Zip object -- it does
#  not create or write a .zip file.
$success = $zip->NewZip("notUsed.zip");
if ($success != 1) {
    print $zip->lastErrorText() . "\n";
    exit;
}

#  Add a reference to a file.  This is the file that will
#  be added to a pre-existing .zip archive.
#  Note: this does not read or compress the file contents --
#  it simply adds a reference to the zip object.
$saveExtraPath = 0;
$success = $zip->AppendOneFileOrDir("something.dat",$saveExtraPath);
if ($success != 1) {
    print $zip->lastErrorText() . "\n";
    exit;
}

#  Appends the contents of the zip object to the preExisting.zip
#  zip archive.  preExisting.zip is opened, and the files
#  referenced by this zip object are streamed in, compressed,
#  and appended to the end of the archive.
$success = $zip->QuickAppend("preExisting.zip");
if ($success != 1) {
    print $zip->lastErrorText() . "\n";
    exit;
}

print "Success!" . "\n";

#  Note: Additional files, directory trees, or in-memory data
#  can be appended by calling AppendOneFileOrDir, AppendFiles,
#  AppendString, AppendData, etc. multiple times.
#  Whatever files and/or in-memory data that are referenced by
#  this zip object will be appended to preExisting.zip when
#  QuickAppend is called.