Perl

Convert Inline Data-URL Images to Related Parts

Demonstrates the Chilkat Email.ConvertInlineImages method, which converts images embedded inline within HTML (as base64 data URLs) into multipart/related MIME parts referenced from the HTML by cid:. This example sets an HTML body containing a data-URL image and converts it.

Background: HTML can embed an image two ways: as a data: URL (the base64 bytes sit right in the src attribute) or as a related part referenced by cid:. Many email clients don't render data: URLs for security reasons, so converting them to proper multipart/related parts — the traditional email way to embed images — greatly improves how reliably the images display.

Chilkat Perl Downloads

Download Chilkat for Perl

Perl

use chilkat();

$success = 0;

#  Demonstrates the ConvertInlineImages method, which converts images embedded inline within
#  HTML (as base64 data URLs) into multipart/related MIME parts referenced from the HTML by
#  CID.

$email = chilkat::CkEmail->new();
$email->put_Subject("Convert inline images");

#  An HTML body with a base64 data-URL image (a 1x1 PNG).
$email->SetHtmlBody("<html><body><img src=\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==\"/></body></html>");

print "NumRelatedItems before = " . $email->get_NumRelatedItems() . "\r\n";

#  Convert the inline data-URL image(s) to multipart/related parts referenced by CID.

$success = $email->ConvertInlineImages();
if ($success == 0) {
    print $email->lastErrorText() . "\r\n";
    exit;
}

print "NumRelatedItems after = " . $email->get_NumRelatedItems() . "\r\n";