Perl

Check if a MIME Part is Application Data

Demonstrates the Chilkat Mime.IsApplicationData method, which returns whether the Content-Type begins with application/. It takes no arguments and applies to the current part.

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: The application/ family covers everything that is not plain media or text — PDFs, Office documents, ZIP archives, JSON, and the S/MIME application/pkcs7-* types. This broad check is a quick way to flag "binary document" parts, though you will usually look at the specific subtype to decide how to handle each.

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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Demonstrates the Mime.IsApplicationData method, which returns whether the Content-Type begins with application/.  It takes no arguments and applies to the current
# part.  This example iterates the parts of a multipart message and reports which ones match.

my $mime = Chilkat2::Mime->new;
my $success = $mime->LoadMimeFile('qa_data/multipart_message.eml');
if (!$success) {
    print $mime->LastErrorText, "\n";
    exit;
}

my $n = $mime->NumParts;
my $part = Chilkat2::Mime->new;
for my $i (0 .. $n - 1) {
    $success = $mime->PartAt($i, $part);
    if (!$success) {
        print $mime->LastErrorText, "\n";
        exit;
    }

    if ($part->IsApplicationData()) {
        print 'Part ', $i, ' (', $part->ContentType, ") is application data.\n";
    }
}