/**
* Creates a part stream handle for the start and end position of the
* message stream, and attaches it to the passed MimePart.
*
* @param MimePart $part
* @param Message $message
* @param int $start
* @param int $end
*/
public function attachPartStreamHandle(MimePart $part, Message $message, $start, $end)
{
$id = $message->getObjectId();
if (empty($this->registeredHandles[$id])) {
return null;
}
$handle = fopen('mmp-mime-message://' . $id . '?start=' . $start . '&end=' . $end, 'r');
$encoding = strtolower($part->getHeaderValue('Content-Transfer-Encoding'));
if ($encoding === 'quoted-printable') {
stream_filter_append($handle, 'convert.quoted-printable-decode', STREAM_FILTER_READ);
} elseif ($encoding === 'base64') {
stream_filter_append($handle, 'convert.base64-decode', STREAM_FILTER_READ);
}
$contentType = strtolower($part->getHeaderValue('Content-Type'));
if (empty($contentType) || strpos($contentType, 'text/') === 0) {
stream_filter_append($handle, 'mailmimeparser-encode.' . $part->getHeaderParameter('Content-Type', 'charset'));
}
$this->registeredPartStreamHandles[$id] = $handle;
$part->attachContentResourceHandle($handle);
}
