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668 lines
26 KiB
PHP
668 lines
26 KiB
PHP
<?php
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/*
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+-----------------------------------------------------------------------+
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| program/include/rcube_message.php |
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| |
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 2008-2010, The Roundcube Dev Team |
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| |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| |
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| PURPOSE: |
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| Logical representation of a mail message with all its data |
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| and related functions |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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$Id$
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*/
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/**
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* Logical representation of a mail message with all its data
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* and related functions
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*
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* @package Mail
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* @author Thomas Bruederli <roundcube@gmail.com>
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*/
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class rcube_message
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{
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/**
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* Instace of rcmail.
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*
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* @var rcmail
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*/
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private $app;
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/**
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* Instance of imap class
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*
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* @var rcube_imap
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*/
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private $imap;
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/**
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* Instance of mime class
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*
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* @var rcube_mime
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*/
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private $mime;
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private $opt = array();
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private $inline_parts = array();
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private $parse_alternative = false;
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public $uid = null;
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public $headers;
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public $parts = array();
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public $mime_parts = array();
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public $attachments = array();
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public $subject = '';
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public $sender = null;
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public $is_safe = false;
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/**
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* __construct
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*
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* Provide a uid, and parse message structure.
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*
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* @param string $uid The message UID.
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*
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* @see self::$app, self::$imap, self::$opt, self::$structure
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*/
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function __construct($uid)
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{
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$this->uid = $uid;
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$this->app = rcmail::get_instance();
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$this->storage = $this->app->get_storage();
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$this->storage->set_options(array('all_headers' => true));
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$this->headers = $this->storage->get_message($uid);
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if (!$this->headers)
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return;
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$this->mime = new rcube_mime($this->headers->charset);
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$this->subject = $this->mime->decode_mime_string($this->headers->subject);
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list(, $this->sender) = each($this->mime->decode_address_list($this->headers->from, 1));
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$this->set_safe((intval($_GET['_safe']) || $_SESSION['safe_messages'][$uid]));
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$this->opt = array(
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'safe' => $this->is_safe,
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'prefer_html' => $this->app->config->get('prefer_html'),
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'get_url' => rcmail_url('get', array(
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'_mbox' => $this->storage->get_folder(), '_uid' => $uid))
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);
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if (!empty($this->headers->structure)) {
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$this->get_mime_numbers($this->headers->structure);
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$this->parse_structure($this->headers->structure);
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}
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else {
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$this->body = $this->storage->get_body($uid);
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}
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// notify plugins and let them analyze this structured message object
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$this->app->plugins->exec_hook('message_load', array('object' => $this));
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}
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/**
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* Return a (decoded) message header
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*
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* @param string $name Header name
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* @param bool $row Don't mime-decode the value
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* @return string Header value
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*/
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public function get_header($name, $raw = false)
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{
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if (empty($this->headers))
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return null;
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if ($this->headers->$name)
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$value = $this->headers->$name;
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else if ($this->headers->others[$name])
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$value = $this->headers->others[$name];
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return $raw ? $value : $this->mime->decode_header($value);
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}
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/**
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* Set is_safe var and session data
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*
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* @param bool $safe enable/disable
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*/
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public function set_safe($safe = true)
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{
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$this->is_safe = $safe;
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$_SESSION['safe_messages'][$this->uid] = $this->is_safe;
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}
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/**
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* Compose a valid URL for getting a message part
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*
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* @param string $mime_id Part MIME-ID
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* @return string URL or false if part does not exist
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*/
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public function get_part_url($mime_id, $embed = false)
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{
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if ($this->mime_parts[$mime_id])
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return $this->opt['get_url'] . '&_part=' . $mime_id . ($embed ? '&_embed=1' : '');
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else
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return false;
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}
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/**
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* Get content of a specific part of this message
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*
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* @param string $mime_id Part MIME-ID
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* @param resource $fp File pointer to save the message part
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* @return string Part content
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*/
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public function get_part_content($mime_id, $fp=NULL)
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{
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if ($part = $this->mime_parts[$mime_id]) {
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// stored in message structure (winmail/inline-uuencode)
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if ($part->encoding == 'stream') {
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if ($fp) {
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fwrite($fp, $part->body);
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}
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return $fp ? true : $part->body;
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}
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// get from IMAP
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return $this->storage->get_message_part($this->uid, $mime_id, $part, NULL, $fp);
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} else
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return null;
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}
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/**
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* Determine if the message contains a HTML part
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*
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* @return bool True if a HTML is available, False if not
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*/
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function has_html_part()
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{
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// check all message parts
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foreach ($this->parts as $pid => $part) {
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$mimetype = strtolower($part->ctype_primary . '/' . $part->ctype_secondary);
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if ($mimetype == 'text/html')
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return true;
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}
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return false;
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}
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/**
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* Return the first HTML part of this message
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*
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* @return string HTML message part content
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*/
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function first_html_part()
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{
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// check all message parts
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foreach ($this->mime_parts as $mime_id => $part) {
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$mimetype = strtolower($part->ctype_primary . '/' . $part->ctype_secondary);
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if ($mimetype == 'text/html') {
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return $this->storage->get_message_part($this->uid, $mime_id, $part);
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}
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}
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}
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/**
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* Return the first text part of this message
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*
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* @param rcube_message_part $part Reference to the part if found
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* @return string Plain text message/part content
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*/
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function first_text_part(&$part=null)
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{
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// no message structure, return complete body
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if (empty($this->parts))
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return $this->body;
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// check all message parts
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foreach ($this->mime_parts as $mime_id => $part) {
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$mimetype = $part->ctype_primary . '/' . $part->ctype_secondary;
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if ($mimetype == 'text/plain') {
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return $this->storage->get_message_part($this->uid, $mime_id, $part);
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}
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else if ($mimetype == 'text/html') {
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$out = $this->storage->get_message_part($this->uid, $mime_id, $part);
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// remove special chars encoding
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$trans = array_flip(get_html_translation_table(HTML_ENTITIES));
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$out = strtr($out, $trans);
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// create instance of html2text class
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$txt = new html2text($out);
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return $txt->get_text();
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}
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}
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$part = null;
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return null;
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}
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/**
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* Raad the message structure returend by the IMAP server
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* and build flat lists of content parts and attachments
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*
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* @param rcube_message_part $structure Message structure node
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* @param bool $recursive True when called recursively
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*/
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private function parse_structure($structure, $recursive = false)
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{
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// real content-type of message/rfc822 part
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if ($structure->mimetype == 'message/rfc822' && $structure->real_mimetype)
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$mimetype = $structure->real_mimetype;
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else
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$mimetype = $structure->mimetype;
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// show message headers
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if ($recursive && is_array($structure->headers) && isset($structure->headers['subject'])) {
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$c = new stdClass;
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$c->type = 'headers';
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$c->headers = &$structure->headers;
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$this->parts[] = $c;
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}
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// Allow plugins to handle message parts
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$plugin = $this->app->plugins->exec_hook('message_part_structure',
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array('object' => $this, 'structure' => $structure,
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'mimetype' => $mimetype, 'recursive' => $recursive));
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if ($plugin['abort'])
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return;
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$structure = $plugin['structure'];
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list($message_ctype_primary, $message_ctype_secondary) = explode('/', $plugin['mimetype']);
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// print body if message doesn't have multiple parts
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if ($message_ctype_primary == 'text' && !$recursive) {
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$structure->type = 'content';
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$this->parts[] = &$structure;
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// Parse simple (plain text) message body
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if ($message_ctype_secondary == 'plain')
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foreach ((array)$this->uu_decode($structure) as $uupart) {
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$this->mime_parts[$uupart->mime_id] = $uupart;
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$this->attachments[] = $uupart;
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}
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}
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// the same for pgp signed messages
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else if ($mimetype == 'application/pgp' && !$recursive) {
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$structure->type = 'content';
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$this->parts[] = &$structure;
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}
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// message contains (more than one!) alternative parts
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else if ($mimetype == 'multipart/alternative'
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&& is_array($structure->parts) && count($structure->parts) > 1
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) {
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// get html/plaintext parts
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$plain_part = $html_part = $print_part = $related_part = null;
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foreach ($structure->parts as $p => $sub_part) {
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$sub_mimetype = $sub_part->mimetype;
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// check if sub part is
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if ($sub_mimetype == 'text/plain')
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$plain_part = $p;
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else if ($sub_mimetype == 'text/html')
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$html_part = $p;
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else if ($sub_mimetype == 'text/enriched')
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$enriched_part = $p;
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else if (in_array($sub_mimetype, array('multipart/related', 'multipart/mixed', 'multipart/alternative')))
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$related_part = $p;
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}
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// parse related part (alternative part could be in here)
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if ($related_part !== null && !$this->parse_alternative) {
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$this->parse_alternative = true;
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$this->parse_structure($structure->parts[$related_part], true);
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$this->parse_alternative = false;
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// if plain part was found, we should unset it if html is preferred
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if ($this->opt['prefer_html'] && count($this->parts))
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$plain_part = null;
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}
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// choose html/plain part to print
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if ($html_part !== null && $this->opt['prefer_html']) {
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$print_part = &$structure->parts[$html_part];
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}
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else if ($enriched_part !== null) {
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$print_part = &$structure->parts[$enriched_part];
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}
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else if ($plain_part !== null) {
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$print_part = &$structure->parts[$plain_part];
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}
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// add the right message body
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if (is_object($print_part)) {
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$print_part->type = 'content';
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$this->parts[] = $print_part;
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}
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// show plaintext warning
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else if ($html_part !== null && empty($this->parts)) {
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$c = new stdClass;
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$c->type = 'content';
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$c->ctype_primary = 'text';
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$c->ctype_secondary = 'plain';
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$c->body = rcube_label('htmlmessage');
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$this->parts[] = $c;
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}
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// add html part as attachment
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if ($html_part !== null && $structure->parts[$html_part] !== $print_part) {
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$html_part = &$structure->parts[$html_part];
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$html_part->filename = rcube_label('htmlmessage');
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$html_part->mimetype = 'text/html';
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$this->attachments[] = $html_part;
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}
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}
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// this is an ecrypted message -> create a plaintext body with the according message
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else if ($mimetype == 'multipart/encrypted') {
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$p = new stdClass;
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$p->type = 'content';
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$p->ctype_primary = 'text';
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$p->ctype_secondary = 'plain';
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$p->body = rcube_label('encryptedmessage');
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$p->size = strlen($p->body);
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$this->parts[] = $p;
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}
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// message contains multiple parts
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else if (is_array($structure->parts) && !empty($structure->parts)) {
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// iterate over parts
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for ($i=0; $i < count($structure->parts); $i++) {
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$mail_part = &$structure->parts[$i];
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$primary_type = $mail_part->ctype_primary;
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$secondary_type = $mail_part->ctype_secondary;
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// real content-type of message/rfc822
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if ($mail_part->real_mimetype) {
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$part_orig_mimetype = $mail_part->mimetype;
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$part_mimetype = $mail_part->real_mimetype;
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list($primary_type, $secondary_type) = explode('/', $part_mimetype);
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}
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else
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$part_mimetype = $mail_part->mimetype;
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// multipart/alternative
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if ($primary_type == 'multipart') {
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$this->parse_structure($mail_part, true);
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// list message/rfc822 as attachment as well (mostly .eml)
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if ($part_orig_mimetype == 'message/rfc822' && !empty($mail_part->filename))
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$this->attachments[] = $mail_part;
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}
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// part text/[plain|html] or delivery status
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else if ((($part_mimetype == 'text/plain' || $part_mimetype == 'text/html') && $mail_part->disposition != 'attachment') ||
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in_array($part_mimetype, array('message/delivery-status', 'text/rfc822-headers', 'message/disposition-notification'))
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) {
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// Allow plugins to handle also this part
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$plugin = $this->app->plugins->exec_hook('message_part_structure',
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array('object' => $this, 'structure' => $mail_part,
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'mimetype' => $part_mimetype, 'recursive' => true));
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if ($plugin['abort'])
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continue;
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if ($part_mimetype == 'text/html') {
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$got_html_part = true;
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}
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$mail_part = $plugin['structure'];
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list($primary_type, $secondary_type) = explode('/', $plugin['mimetype']);
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// add text part if it matches the prefs
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if (!$this->parse_alternative ||
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($secondary_type == 'html' && $this->opt['prefer_html']) ||
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($secondary_type == 'plain' && !$this->opt['prefer_html'])
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) {
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$mail_part->type = 'content';
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$this->parts[] = $mail_part;
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}
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// list as attachment as well
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if (!empty($mail_part->filename))
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$this->attachments[] = $mail_part;
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}
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// part message/*
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else if ($primary_type == 'message') {
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$this->parse_structure($mail_part, true);
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// list as attachment as well (mostly .eml)
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if (!empty($mail_part->filename))
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$this->attachments[] = $mail_part;
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}
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// ignore "virtual" protocol parts
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else if ($primary_type == 'protocol') {
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continue;
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}
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// part is Microsoft Outlook TNEF (winmail.dat)
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else if ($part_mimetype == 'application/ms-tnef') {
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foreach ((array)$this->tnef_decode($mail_part) as $tpart) {
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$this->mime_parts[$tpart->mime_id] = $tpart;
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$this->attachments[] = $tpart;
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}
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}
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// part is a file/attachment
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else if (preg_match('/^(inline|attach)/', $mail_part->disposition) ||
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$mail_part->headers['content-id'] ||
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($mail_part->filename &&
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(empty($mail_part->disposition) || preg_match('/^[a-z0-9!#$&.+^_-]+$/i', $mail_part->disposition)))
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) {
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// skip apple resource forks
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if ($message_ctype_secondary == 'appledouble' && $secondary_type == 'applefile')
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continue;
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// part belongs to a related message and is linked
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if ($mimetype == 'multipart/related'
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&& ($mail_part->headers['content-id'] || $mail_part->headers['content-location'])) {
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if ($mail_part->headers['content-id'])
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$mail_part->content_id = preg_replace(array('/^</', '/>$/'), '', $mail_part->headers['content-id']);
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if ($mail_part->headers['content-location'])
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$mail_part->content_location = $mail_part->headers['content-base'] . $mail_part->headers['content-location'];
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$this->inline_parts[] = $mail_part;
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}
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// attachment encapsulated within message/rfc822 part needs further decoding (#1486743)
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else if ($part_orig_mimetype == 'message/rfc822') {
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$this->parse_structure($mail_part, true);
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// list as attachment as well (mostly .eml)
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if (!empty($mail_part->filename))
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$this->attachments[] = $mail_part;
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}
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// regular attachment with valid content type
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// (content-type name regexp according to RFC4288.4.2)
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else if (preg_match('/^[a-z0-9!#$&.+^_-]+\/[a-z0-9!#$&.+^_-]+$/i', $part_mimetype)) {
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if (!$mail_part->filename)
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$mail_part->filename = 'Part '.$mail_part->mime_id;
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$this->attachments[] = $mail_part;
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}
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// attachment with invalid content type
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// replace malformed content type with application/octet-stream (#1487767)
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else if ($mail_part->filename) {
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$mail_part->ctype_primary = 'application';
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$mail_part->ctype_secondary = 'octet-stream';
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$mail_part->mimetype = 'application/octet-stream';
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|
|
|
$this->attachments[] = $mail_part;
|
|
}
|
|
}
|
|
// attachment part as message/rfc822 (#1488026)
|
|
else if ($mail_part->mimetype == 'message/rfc822') {
|
|
$this->parse_structure($mail_part);
|
|
}
|
|
}
|
|
|
|
// if this was a related part try to resolve references
|
|
if ($mimetype == 'multipart/related' && sizeof($this->inline_parts)) {
|
|
$a_replaces = array();
|
|
$img_regexp = '/^image\/(gif|jpe?g|png|tiff|bmp|svg)/';
|
|
|
|
foreach ($this->inline_parts as $inline_object) {
|
|
$part_url = $this->get_part_url($inline_object->mime_id, true);
|
|
if ($inline_object->content_id)
|
|
$a_replaces['cid:'.$inline_object->content_id] = $part_url;
|
|
if ($inline_object->content_location) {
|
|
$a_replaces[$inline_object->content_location] = $part_url;
|
|
}
|
|
|
|
if (!empty($inline_object->filename)) {
|
|
// MS Outlook sends sometimes non-related attachments as related
|
|
// In this case multipart/related message has only one text part
|
|
// We'll add all such attachments to the attachments list
|
|
if (!isset($got_html_part) && empty($inline_object->content_id)) {
|
|
$this->attachments[] = $inline_object;
|
|
}
|
|
// MS Outlook sometimes also adds non-image attachments as related
|
|
// We'll add all such attachments to the attachments list
|
|
// Warning: some browsers support pdf in <img/>
|
|
else if (!preg_match($img_regexp, $inline_object->mimetype)) {
|
|
$this->attachments[] = $inline_object;
|
|
}
|
|
// @TODO: we should fetch HTML body and find attachment's content-id
|
|
// to handle also image attachments without reference in the body
|
|
// @TODO: should we list all image attachments in text mode?
|
|
}
|
|
}
|
|
|
|
// add replace array to each content part
|
|
// (will be applied later when part body is available)
|
|
foreach ($this->parts as $i => $part) {
|
|
if ($part->type == 'content')
|
|
$this->parts[$i]->replaces = $a_replaces;
|
|
}
|
|
}
|
|
}
|
|
// message is a single part non-text
|
|
else if ($structure->filename) {
|
|
$this->attachments[] = $structure;
|
|
}
|
|
// message is a single part non-text (without filename)
|
|
else if (preg_match('/application\//i', $mimetype)) {
|
|
$structure->filename = 'Part '.$structure->mime_id;
|
|
$this->attachments[] = $structure;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Fill aflat array with references to all parts, indexed by part numbers
|
|
*
|
|
* @param rcube_message_part $part Message body structure
|
|
*/
|
|
private function get_mime_numbers(&$part)
|
|
{
|
|
if (strlen($part->mime_id))
|
|
$this->mime_parts[$part->mime_id] = &$part;
|
|
|
|
if (is_array($part->parts))
|
|
for ($i=0; $i<count($part->parts); $i++)
|
|
$this->get_mime_numbers($part->parts[$i]);
|
|
}
|
|
|
|
|
|
/**
|
|
* Decode a Microsoft Outlook TNEF part (winmail.dat)
|
|
*
|
|
* @param rcube_message_part $part Message part to decode
|
|
* @return array
|
|
*/
|
|
function tnef_decode(&$part)
|
|
{
|
|
// @TODO: attachment may be huge, hadle it via file
|
|
if (!isset($part->body))
|
|
$part->body = $this->storage->get_message_part($this->uid, $part->mime_id, $part);
|
|
|
|
$parts = array();
|
|
$tnef = new tnef_decoder;
|
|
$tnef_arr = $tnef->decompress($part->body);
|
|
|
|
foreach ($tnef_arr as $pid => $winatt) {
|
|
$tpart = new rcube_message_part;
|
|
|
|
$tpart->filename = trim($winatt['name']);
|
|
$tpart->encoding = 'stream';
|
|
$tpart->ctype_primary = trim(strtolower($winatt['type']));
|
|
$tpart->ctype_secondary = trim(strtolower($winatt['subtype']));
|
|
$tpart->mimetype = $tpart->ctype_primary . '/' . $tpart->ctype_secondary;
|
|
$tpart->mime_id = 'winmail.' . $part->mime_id . '.' . $pid;
|
|
$tpart->size = $winatt['size'];
|
|
$tpart->body = $winatt['stream'];
|
|
|
|
$parts[] = $tpart;
|
|
unset($tnef_arr[$pid]);
|
|
}
|
|
|
|
return $parts;
|
|
}
|
|
|
|
|
|
/**
|
|
* Parse message body for UUencoded attachments bodies
|
|
*
|
|
* @param rcube_message_part $part Message part to decode
|
|
* @return array
|
|
*/
|
|
function uu_decode(&$part)
|
|
{
|
|
// @TODO: messages may be huge, hadle body via file
|
|
if (!isset($part->body))
|
|
$part->body = $this->storage->get_message_part($this->uid, $part->mime_id, $part);
|
|
|
|
$parts = array();
|
|
// FIXME: line length is max.65?
|
|
$uu_regexp = '/begin [0-7]{3,4} ([^\n]+)\n(([\x21-\x7E]{0,65}\n)+)`\nend/s';
|
|
|
|
if (preg_match_all($uu_regexp, $part->body, $matches, PREG_SET_ORDER)) {
|
|
// remove attachments bodies from the message body
|
|
$part->body = preg_replace($uu_regexp, '', $part->body);
|
|
// update message content-type
|
|
$part->ctype_primary = 'multipart';
|
|
$part->ctype_secondary = 'mixed';
|
|
$part->mimetype = $part->ctype_primary . '/' . $part->ctype_secondary;
|
|
|
|
// add attachments to the structure
|
|
foreach ($matches as $pid => $att) {
|
|
$uupart = new rcube_message_part;
|
|
|
|
$uupart->filename = trim($att[1]);
|
|
$uupart->encoding = 'stream';
|
|
$uupart->body = convert_uudecode($att[2]);
|
|
$uupart->size = strlen($uupart->body);
|
|
$uupart->mime_id = 'uu.' . $part->mime_id . '.' . $pid;
|
|
|
|
$ctype = rc_mime_content_type($uupart->body, $uupart->filename, 'application/octet-stream', true);
|
|
$uupart->mimetype = $ctype;
|
|
list($uupart->ctype_primary, $uupart->ctype_secondary) = explode('/', $ctype);
|
|
|
|
$parts[] = $uupart;
|
|
unset($matches[$pid]);
|
|
}
|
|
}
|
|
|
|
return $parts;
|
|
}
|
|
}
|