(Perl) Get Compressed ZIP Entry Data as Base64 Using ZipEntry.CopyToBase64

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This example creates a small ZIP archive containing a text file added from memory, writes the ZIP to disk, re-opens it, and then uses ZipEntry.CopyToBase64 to retrieve the compressed data for the text file as a Base64-encoded string.

The Base64 string returned by CopyToBase64 represents the compressed bytes stored for the entry inside the ZIP archive. It is not the original uncompressed text data.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux

use chilkat();

$success = 0;

# ------------------------------------------------------------
# First create a sample ZIP archive containing a small text file.

$zip = chilkat::CkZip->new();

$success = $zip->NewZip("c:/temp/sampleText.zip");
if ($success == 0) {
    print $zip->lastErrorText() . "\r\n";
    exit;
}

# Add a small text file from memory.
# The text is stored in the ZIP as "hello.txt".
$success = $zip->AddString("hello.txt","Hello from a ZIP entry!","utf-8");
if ($success == 0) {
    print $zip->lastErrorText() . "\r\n";
    exit;
}

# Write the ZIP archive to disk and close it.
$success = $zip->WriteZipAndClose();
if ($success == 0) {
    print $zip->lastErrorText() . "\r\n";
    exit;
}

# ------------------------------------------------------------
# Now open the ZIP archive we just created.

$zip2 = chilkat::CkZip->new();

$success = $zip2->OpenZip("c:/temp/sampleText.zip");
if ($success == 0) {
    print $zip2->lastErrorText() . "\r\n";
    exit;
}

# Get the text file entry.
$entry = chilkat::CkZipEntry->new();

$success = $zip2->EntryOf("hello.txt",$entry);

if ($success == 0) {
    print "Entry not found." . "\r\n";
    exit;
}

# Get the compressed ZIP entry data as Base64.
# 
# This is the compressed data stored inside the ZIP file,
# not the uncompressed text "Hello from a ZIP entry!".
$b64 = $entry->copyToBase64();

print "Base64 compressed ZIP entry data:" . "\r\n";
print $b64 . "\r\n";

$zip2->CloseZip();

print "Done." . "\r\n";