Perl

Get a Header Field by Name

Demonstrates the Chilkat Email.GetHeaderField method, which returns the value of a header field by name. Header-field names are case-insensitive, so X-Priority and x-priority refer to the same field. This example reads several headers by name.

Background: Looking up a header by name is the quickest way to read a known field like Subject or a custom X- header. One caveat: some header names (such as Received) can legitimately appear more than once. When a field may repeat and you need every occurrence, enumerate by index with GetHeaderFieldName and GetHeaderFieldValue instead of looking up by name.

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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Demonstrates the GetHeaderField method, which returns the value of a header field by
# name.  Header-field names are case-insensitive.

my $email = Chilkat2::Email->new;
$email->Subject('Quarterly report');
$email->From('alice@example.com');
$email->AddHeaderField('X-Priority', '1');

# Get header field values by name.
print 'Subject = ', $email->GetHeaderField('Subject'), "\n";
print 'From = ', $email->GetHeaderField('From'), "\n";
print 'X-Priority = ', $email->GetHeaderField('x-priority'), "\n";