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<?php
/**
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Christoph Wurst <wurst.christoph@gmail.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* Mail
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\Mail;
use Horde_Imap_Client_Data_Fetch;
use OCP\AppFramework\Db\DoesNotExistException;
class Attachment {
/**
* @param \Horde_Imap_Client_Socket $conn
* @param \Horde_Imap_Client_Mailbox $mailBox
* @param int $messageUid
* @param string $attachmentId
*/
public function __construct($conn, $mailBox, $messageUid, $attachmentId) {
$this->conn = $conn;
$this->mailBox = $mailBox;
$this->messageUid = $messageUid;
$this->attachmentId = $attachmentId;
$this->load();
}
/**
* @var \Horde_Imap_Client_Socket
*/
private $conn;
/**
* @var \Horde_Imap_Client_Mailbox
*/
private $mailBox;
private $messageUid;
private $attachmentId;
/**
* @var \Horde_Mime_Part
*/
private $mimePart;
private function load(): void {
$fetch_query = new \Horde_Imap_Client_Fetch_Query();
$fetch_query->bodyPart($this->attachmentId);
$fetch_query->mimeHeader($this->attachmentId);
// $list is an array of Horde_Imap_Client_Data_Fetch objects.
$ids = new \Horde_Imap_Client_Ids($this->messageUid);
$headers = $this->conn->fetch($this->mailBox, $fetch_query, ['ids' => $ids]);
if (!isset($headers[$this->messageUid])) {
throw new DoesNotExistException('Unable to load the attachment.');
}
/** @var Horde_Imap_Client_Data_Fetch $fetch */
$fetch = $headers[$this->messageUid];
/** @var \Horde_Mime_Headers $mimeHeaders */
$mimeHeaders = $fetch->getMimeHeader($this->attachmentId, Horde_Imap_Client_Data_Fetch::HEADER_PARSE);
$this->mimePart = new \Horde_Mime_Part();
// Serve all files with a content-disposition of "attachment" to prevent Cross-Site Scripting
$this->mimePart->setDisposition('attachment');
// Extract headers from part
$contentDisposition = $mimeHeaders->getValue('content-disposition', \Horde_Mime_Headers::VALUE_PARAMS);
if (!is_null($contentDisposition) && isset($contentDisposition['filename'])) {
$this->mimePart->setDispositionParameter('filename', $contentDisposition['filename']);
} else {
$contentDisposition = $mimeHeaders->getValue('content-type', \Horde_Mime_Headers::VALUE_PARAMS);
if (isset($contentDisposition['name'])) {
$this->mimePart->setContentTypeParameter('name', $contentDisposition['name']);
}
}
/* Content transfer encoding. */
if ($tmp = $mimeHeaders->getValue('content-transfer-encoding')) {
$this->mimePart->setTransferEncoding($tmp);
}
/* Content type */
if (strstr($mimeHeaders->getValue('content-type'), 'text/calendar')) {
$this->mimePart->setType('text/calendar');
if ($this->mimePart->getContentTypeParameter('name') === null) {
$this->mimePart->setContentTypeParameter('name', 'calendar.ics');
}
} else {
// To prevent potential problems with the SOP we serve all files but calendar entries with the
// MIME type "application/octet-stream"
$this->mimePart->setType('application/octet-stream');
}
$body = $fetch->getBodyPart($this->attachmentId);
$this->mimePart->setContents($body);
}
/**
* @return string
*/
public function getContents() {
return $this->mimePart->getContents();
}
/**
* @return string|null
*/
public function getName() {
return $this->mimePart->getName();
}
/**
* @return string
*/
public function getType() {
return $this->mimePart->getType();
}
}
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