Perl

Check if a MIME Part is an Attachment

Demonstrates the Chilkat Mime.IsAttachment method, which returns whether the current part's Content-Disposition is attachment (matched case-insensitively). 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: Whether a part is an attachment is about disposition, not content type — an image can be inline (Content-Disposition: inline) or an attachment. This predicate keys off that header, which is the right basis for deciding what to list as a downloadable attachment versus what to render within the message body.

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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Demonstrates the Mime.IsAttachment method, which returns whether the part's Content-Disposition is attachment.  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->IsAttachment()) {
        print 'Part ', $i, ' (', $part->ContentType, ") is an attachment.\n";
    }
}