(Perl) Download IMAP Message Set using FetchBundle

Demonstrates how to read IMAP emails using the FetchBundle method.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$imap = chilkat::CkImap->new();

# Connect using TLS.
$imap->put_Ssl(1);
$imap->put_Port(993);
$success = $imap->Connect("imap.example.com");
if ($success != 1) {
    print $imap->lastErrorText() . "\r\n";
    exit;
}

# Authenticate
$success = $imap->Login("email_account_login","email_account_password");
if ($success != 1) {
    print $imap->lastErrorText() . "\r\n";
    exit;
}

# Select an IMAP mailbox
$success = $imap->SelectMailbox("Inbox");
if ($success != 1) {
    print $imap->lastErrorText() . "\r\n";
    exit;
}

# Search for messages with the word "test" in the subject.
$fetchUids = 1;
# messageSet is a MessageSet
$messageSet = $imap->Search("Subject test",$fetchUids);
if ($imap->get_LastMethodSuccess() != 1) {
    print $imap->lastErrorText() . "\r\n";
    exit;
}

# Download the messages in a single call to FetchBundle.
# 
# This only makes sense if the number of emails to be downloaded is not too large.  
# For example, you wouldn't want to download 10000 emails in a single call to FetchBundle.
# Why? For two reasons:  (1) It could potentially cause an out-of-memory condition, and 
# (2) it would take an extremely large amount of time.  The longer the amount of time,
# the greater the likelihood of some kind of external networking or server problem occuring,
# and if it happens, then you would need to re-download everything from the beginning again.
# For large numbers of emails, it's better to loop over the emails in the message set
# and download/process one at a time as shown here: Download IMAP Messages One at a Time
# Downloading one message at a time makes it possible to resume the downloads rather than restart the entire operation all over again.

# If the message set is reasonable in size, you can download all at once using FetchBundle:

print "Number of messages = " . $messageSet->get_Count() . "\r\n";

# bundle is a EmailBundle
$bundle = $imap->FetchBundle($messageSet);
if ($imap->get_LastMethodSuccess() == 0) {

    print $imap->lastErrorText() . "\r\n";
    exit;
}

# Display the Subject and From of each email.
$i = 0;
$numEmails = $bundle->get_MessageCount();
while ($i < $numEmails) {
    # email is a Email
    $email = $bundle->GetEmail($i);

    print $email->getHeaderField("Date") . "\r\n";
    print $email->subject() . "\r\n";
    print $email->ck_from() . "\r\n";
    print "--" . "\r\n";

    $i = $i + 1;
}