Perl

Decode Base64 Image String (GIF, JPG, etc.) and Save to File

I have an XML response that includes a base 64 encoded image string (UPS label). It's a huge string and I need to save it as a gif file on my users pc.

This example shows how to do it..

Perl

use chilkat();

$success = 0;

$bd = chilkat::CkBinData->new();

# I created an extra-small GIF image for this example..
$success = $bd->LoadFile("qa_data/gif/xsmall.gif");
if ($success != 1) {
    print "Failed to load GIF image file." . "\r\n";
    exit;
}

# Show GIF bytes as base64:
print $bd->getEncoded("base64") . "\r\n";

# This particular GIF in base64 is this:
# R0lGODlhBQAFAMQAAAAAAP////z8/PHx8evr6+jo6OHh4d7e3sPDw8LCwpqamo2NjWxsbGRkZFpaWk1NTUtLS0hISCwsLCQkJP///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABQALAAAAAAFAAUAAAUTYCAYQUBAU1lI0TIgztE8jFImIQA7

# Let's begin with an XML string:
$x = "<abc><def>R0lGODlhBQAFAMQAAAAAAP////z8/PHx8evr6+jo6OHh4d7e3sPDw8LCwpqamo2NjWxsbGRkZFpaWk1NTUtLS0hISCwsLCQkJP///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABQALAAAAAAFAAUAAAUTYCAYQUBAU1lI0TIgztE8jFImIQA7</def></abc>";

$xml = chilkat::CkXml->new();
$success = $xml->LoadXml($x);

# Get the base64 string:
$gifBase64 = $xml->getChildContent("def");

print $gifBase64 . "\r\n";

# Load bd with the base64 decoded bytes.  
$bd->Clear();
$bd->AppendEncoded($gifBase64,"base64");

# Save to a GIF file.
$success = $bd->WriteFile("qa_output/xsmall.gif");