Perl

Check if a MIME Entity is multipart/alternative

Demonstrates the Chilkat Mime.IsMultipartAlternative method, which returns whether the Content-Type is exactly multipart/alternative. It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Recognizing multipart/alternative matters because its children are the same content in different formats — you display one (usually the last renderable), not all of them. That is the opposite of multipart/mixed, where every child is shown.

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Perl

use chilkat();

$success = 0;

#  Demonstrates the Mime.IsMultipartAlternative method, which returns whether the Content-Type is multipart/alternative.  It takes no arguments.

$mime = chilkat::CkMime->new();
$success = $mime->LoadMimeFile("qa_data/multipart_message.eml");
if ($success == 0) {
    print $mime->lastErrorText() . "\r\n";
    exit;
}

if ($mime->IsMultipartAlternative()) {
    print "This is a multipart/alternative entity." . "\r\n";
}
else {
    print "This is not multipart/alternative." . "\r\n";
}