githubFork/roundcubemail.git

Message/rfc822 attachment preview (#5054)

Aleksander Machniak

2016-03-23 323fa20bc89edcd683bef1a170445f681305fc5c

commit \| author \| age
8fa58e	1	<?php
T	2
a95874	3	/**
8fa58e	4	+-----------------------------------------------------------------------+
e019f2	5	\| This file is part of the Roundcube Webmail client \|
48ba44	6	\| Copyright (C) 2008-2014, The Roundcube Dev Team \|
7fe381	7	\| \|
T	8	\| Licensed under the GNU General Public License version 3 or \|
	9	\| any later version with exceptions for skins & plugins. \|
	10	\| See the README file for a full license statement. \|
8fa58e	11	\| \|
T	12	\| PURPOSE: \|
	13	\| Logical representation of a mail message with all its data \|
	14	\| and related functions \|
	15	+-----------------------------------------------------------------------+
	16	\| Author: Thomas Bruederli <roundcube@gmail.com> \|
	17	+-----------------------------------------------------------------------+
	18	*/
	19
	20	/**
45f56c	21	* Logical representation of a mail message with all its data
T	22	* and related functions
8fa58e	23	*
9ab346	24	* @package Framework
AM	25	* @subpackage Storage
8fa58e	26	* @author Thomas Bruederli <roundcube@gmail.com>
T	27	*/
	28	class rcube_message
	29	{
5c461b	30	/**
be98df	31	* Instace of framework class.
5c461b	32	*
be98df	33	* @var rcube
5c461b	34	*/
d311d8	35	private $app;
5c461b	36
A	37	/**
8b92d2	38	* Instance of storage class
5c461b	39	*
8b92d2	40	* @var rcube_storage
5c461b	41	*/
8b92d2	42	private $storage;
1c4f23	43
A	44	/**
	45	* Instance of mime class
	46	*
	47	* @var rcube_mime
	48	*/
	49	private $mime;
d311d8	50	private $opt = array();
A	51	private $parse_alternative = false;
2ae58f	52
10562d	53	public $uid;
AM	54	public $folder;
d311d8	55	public $headers;
9af8e2	56	public $sender;
323fa2	57	public $context;
9af8e2	58	public $parts = array();
AM	59	public $mime_parts = array();
287eff	60	public $inline_parts = array();
9af8e2	61	public $attachments = array();
AM	62	public $subject = '';
	63	public $is_safe = false;
48ba44	64
AM	65	const BODY_MAX_SIZE = 1048576; // 1MB
2ae58f	66
193fb4	67
d311d8	68	/**
A	69	* __construct
	70	*
	71	* Provide a uid, and parse message structure.
	72	*
63e793	73	* @param string $uid The message UID.
AM	74	* @param string $folder Folder name
	75	* @param bool $is_safe Security flag
d311d8	76	*
8b92d2	77	* @see self::$app, self::$storage, self::$opt, self::$parts
d311d8	78	*/
63e793	79	function __construct($uid, $folder = null, $is_safe = false)
8fa58e	80	{
e8cb51	81	// decode combined UID-folder identifier
323fa2	82	if (preg_match('/^[0-9.]+-.+/', $uid)) {
1d1fdc	83	list($uid, $folder) = explode('-', $uid, 2);
e8cb51	84	}
TB	85
323fa2	86	if (preg_match('/^([0-9]+)\.([0-9.]+)$/', $uid, $matches)) {
AM	87	$uid = $matches[1];
	88	$context = $matches[2];
	89	}
	90
63e793	91	$this->uid = $uid;
323fa2	92	$this->context = $context;
63e793	93	$this->app = rcube::get_instance();
c321a9	94	$this->storage = $this->app->get_storage();
10562d	95	$this->folder = strlen($folder) ? $folder : $this->storage->get_folder();
AM	96
	97	// Set current folder
	98	$this->storage->set_folder($this->folder);
63e793	99	$this->storage->set_options(array('all_headers' => true));
64e3e8	100
c321a9	101	$this->headers = $this->storage->get_message($uid);
64e3e8	102
4fdaa0	103	if (!$this->headers) {
64e3e8	104	return;
4fdaa0	105	}
64e3e8	106
63e793	107	$this->set_safe($is_safe \|\| $_SESSION['safe_messages'][$this->folder.':'.$uid]);
d311d8	108	$this->opt = array(
59d11d	109	'safe' => $this->is_safe,
d311d8	110	'prefer_html' => $this->app->config->get('prefer_html'),
59d11d	111	'get_url' => $this->app->url(array(
AM	112	'action' => 'get',
	113	'mbox' => $this->folder,
4a4088	114	'uid' => $uid),
TB	115	false, false, true)
d311d8	116	);
8fa58e	117
80152b	118	if (!empty($this->headers->structure)) {
A	119	$this->get_mime_numbers($this->headers->structure);
	120	$this->parse_structure($this->headers->structure);
aa16b4	121	}
323fa2	122	else if ($this->context === null) {
c321a9	123	$this->body = $this->storage->get_body($uid);
d311d8	124	}
323fa2	125
AM	126	$this->mime = new rcube_mime($this->headers->charset);
	127	$this->subject = $this->headers->get('subject');
	128	list(, $this->sender) = each($this->mime->decode_address_list($this->headers->from, 1));
d311d8	129
A	130	// notify plugins and let them analyze this structured message object
	131	$this->app->plugins->exec_hook('message_load', array('object' => $this));
	132	}
2ae58f	133
d311d8	134	/**
A	135	* Return a (decoded) message header
	136	*
5c461b	137	* @param string $name Header name
A	138	* @param bool $row Don't mime-decode the value
d311d8	139	* @return string Header value
A	140	*/
	141	public function get_header($name, $raw = false)
	142	{
4fdaa0	143	if (empty($this->headers)) {
1c4f23	144	return null;
4fdaa0	145	}
1c4f23	146
4fdaa0	147	return $this->headers->get($name, !$raw);
d311d8	148	}
A	149
	150	/**
	151	* Set is_safe var and session data
	152	*
5c461b	153	* @param bool $safe enable/disable
d311d8	154	*/
A	155	public function set_safe($safe = true)
	156	{
f11142	157	$_SESSION['safe_messages'][$this->folder.':'.$this->uid] = $this->is_safe = $safe;
d311d8	158	}
A	159
	160	/**
	161	* Compose a valid URL for getting a message part
	162	*
5c461b	163	* @param string $mime_id Part MIME-ID
a021d6	164	* @param mixed $embed Mimetype class for parts to be embedded
d311d8	165	* @return string URL or false if part does not exist
A	166	*/
57486f	167	public function get_part_url($mime_id, $embed = false)
d311d8	168	{
A	169	if ($this->mime_parts[$mime_id])
a021d6	170	return $this->opt['get_url'] . '&_part=' . $mime_id . ($embed ? '&_embed=1&_mimeclass=' . $embed : '');
aa16b4	171	else
d311d8	172	return false;
8fa58e	173	}
d311d8	174
A	175	/**
	176	* Get content of a specific part of this message
	177	*
71950d	178	* @param string $mime_id Part MIME-ID
A	179	* @param resource $fp File pointer to save the message part
	180	* @param boolean $skip_charset_conv Disables charset conversion
dff2c7	181	* @param int $max_bytes Only read this number of bytes
ae8533	182	* @param boolean $formatted Enables formatting of text/* parts bodies
71950d	183	*
d311d8	184	* @return string Part content
48ba44	185	* @deprecated
d311d8	186	*/
ae8533	187	public function get_part_content($mime_id, $fp = null, $skip_charset_conv = false, $max_bytes = 0, $formatted = true)
d311d8	188	{
A	189	if ($part = $this->mime_parts[$mime_id]) {
	190	// stored in message structure (winmail/inline-uuencode)
8b92d2	191	if (!empty($part->body) \|\| $part->encoding == 'stream') {
d311d8	192	if ($fp) {
A	193	fwrite($fp, $part->body);
	194	}
	195	return $fp ? true : $part->body;
	196	}
10562d	197
d311d8	198	// get from IMAP
10562d	199	$this->storage->set_folder($this->folder);
AM	200
ae8533	201	return $this->storage->get_message_part($this->uid, $mime_id, $part,
AM	202	NULL, $fp, $skip_charset_conv, $max_bytes, $formatted);
10562d	203	}
48ba44	204	}
AM	205
	206	/**
	207	* Get content of a specific part of this message
	208	*
	209	* @param string $mime_id Part ID
	210	* @param boolean $formatted Enables formatting of text/* parts bodies
	211	* @param int $max_bytes Only return/read this number of bytes
	212	* @param mixed $mode NULL to return a string, -1 to print body
	213	* or file pointer to save the body into
	214	*
	215	* @return string\|bool Part content or operation status
	216	*/
	217	public function get_part_body($mime_id, $formatted = false, $max_bytes = 0, $mode = null)
	218	{
	219	if (!($part = $this->mime_parts[$mime_id])) {
	220	return;
	221	}
9af8e2	222
AM	223	// allow plugins to modify part body
	224	$plugin = $this->app->plugins->exec_hook('message_part_body',
	225	array('object' => $this, 'part' => $part));
48ba44	226
AM	227	// only text parts can be formatted
	228	$formatted = $formatted && $part->ctype_primary == 'text';
	229
	230	// part body not fetched yet... save in memory if it's small enough
	231	if ($part->body === null && is_numeric($mime_id) && $part->size < self::BODY_MAX_SIZE) {
d93019	232	$this->storage->set_folder($this->folder);
48ba44	233	// Warning: body here should be always unformatted
AM	234	$part->body = $this->storage->get_message_part($this->uid, $mime_id, $part,
	235	null, null, true, 0, false);
	236	}
	237
	238	// body stored in message structure (winmail/inline-uuencode)
	239	if ($part->body !== null \|\| $part->encoding == 'stream') {
	240	$body = $part->body;
	241
	242	if ($formatted && $body) {
	243	$body = self::format_part_body($body, $part, $this->headers->charset);
	244	}
	245
	246	if ($max_bytes && strlen($body) > $max_bytes) {
	247	$body = substr($body, 0, $max_bytes);
	248	}
	249
	250	if (is_resource($mode)) {
	251	if ($body !== false) {
	252	fwrite($mode, $body);
	253	rewind($mode);
	254	}
	255
	256	return $body !== false;
	257	}
	258
	259	if ($mode === -1) {
	260	if ($body !== false) {
	261	print($body);
	262	}
	263
	264	return $body !== false;
	265	}
	266
	267	return $body;
	268	}
	269
	270	// get the body from IMAP
	271	$this->storage->set_folder($this->folder);
	272
	273	$body = $this->storage->get_message_part($this->uid, $mime_id, $part,
68c41f	274	$mode === -1, is_resource($mode) ? $mode : null,
AM	275	!($mode && $formatted), $max_bytes, $mode && $formatted);
48ba44	276
AM	277	if (is_resource($mode)) {
	278	rewind($mode);
	279	return $body !== false;
	280	}
	281
68c41f	282	if (!$mode && $body && $formatted) {
AM	283	$body = self::format_part_body($body, $part, $this->headers->charset);
	284	}
	285
48ba44	286	return $body;
AM	287	}
	288
	289	/**
	290	* Format text message part for display
	291	*
	292	* @param string $body Part body
	293	* @param rcube_message_part $part Part object
	294	* @param string $default_charset Fallback charset if part charset is not specified
	295	*
	296	* @return string Formatted body
	297	*/
	298	public static function format_part_body($body, $part, $default_charset = null)
	299	{
	300	// remove useless characters
	301	$body = preg_replace('/[\t\r\0\x0B]+\n/', "\n", $body);
	302
	303	// remove NULL characters if any (#1486189)
	304	if (strpos($body, "\x00") !== false) {
	305	$body = str_replace("\x00", '', $body);
	306	}
	307
	308	// detect charset...
	309	if (!$part->charset \|\| strtoupper($part->charset) == 'US-ASCII') {
	310	// try to extract charset information from HTML meta tag (#1488125)
	311	if ($part->ctype_secondary == 'html' && preg_match('/<meta[^>]+charset=([a-z0-9-_]+)/i', $body, $m)) {
	312	$part->charset = strtoupper($m[1]);
	313	}
	314	else if ($default_charset) {
	315	$part->charset = $default_charset;
	316	}
	317	else {
	318	$rcube = rcube::get_instance();
	319	$part->charset = $rcube->config->get('default_charset', RCUBE_CHARSET);
	320	}
	321	}
	322
	323	// ..convert charset encoding
	324	$body = rcube_charset::convert($body, $part->charset);
	325
	326	return $body;
8fa58e	327	}
T	328
d311d8	329	/**
5c26bd	330	* Determine if the message contains a HTML part. This must to be
AM	331	* a real part not an attachment (or its part)
d311d8	332	*
b92a66	333	* @param bool $enriched Enables checking for text/enriched parts too
AM	334	* @param rcube_message_part &$part Reference to the part if found
33423a	335	*
d311d8	336	* @return bool True if a HTML is available, False if not
A	337	*/
b92a66	338	public function has_html_part($enriched = false, &$part = null)
d311d8	339	{
A	340	// check all message parts
574928	341	foreach ($this->mime_parts as $part) {
323fa2	342	if (!$this->check_context($part)) {
AM	343	continue;
	344	}
	345
52d0d9	346	if ($part->mimetype == 'text/html' \|\| ($enriched && $part->mimetype == 'text/enriched')) {
0ef894	347	// Skip if part is an attachment, don't use is_attachment() here
AM	348	if ($part->filename) {
5c26bd	349	continue;
AM	350	}
33423a	351
5c26bd	352	$level = explode('.', $part->mime_id);
f8101f	353	$depth = count($level);
4c0cb9	354	$last = '';
5c26bd	355
5a2d2a	356	// Check if the part belongs to higher-level's multipart part
f8101f	357	// this can be alternative/related/signed/encrypted or mixed
5c26bd	358	while (array_pop($level) !== null) {
f8101f	359	$parent_depth = count($level);
TB	360	if (!$parent_depth) {
5c26bd	361	return true;
33423a	362	}
A	363
4c0cb9	364	$parent = $this->mime_parts[join('.', $level)];
AM	365	$max_delta = $depth - (1 + ($last == 'multipart/alternative' ? 1 : 0));
	366	$last = $parent->mimetype;
	367
f8101f	368	if (!preg_match('/^multipart\/(alternative\|related\|signed\|encrypted\|mixed)$/', $parent->mimetype)
4c0cb9	369	\|\| ($parent->mimetype == 'multipart/mixed' && $parent_depth < $max_delta)) {
5c26bd	370	continue 2;
33423a	371	}
A	372	}
	373
5c26bd	374	if ($part->size) {
AM	375	return true;
	376	}
	377	}
	378	}
	379
b92a66	380	$part = null;
AM	381
5c26bd	382	return false;
AM	383	}
	384
	385	/**
	386	* Determine if the message contains a text/plain part. This must to be
	387	* a real part not an attachment (or its part)
	388	*
b92a66	389	* @param rcube_message_part &$part Reference to the part if found
AM	390	*
5c26bd	391	* @return bool True if a plain text part is available, False if not
AM	392	*/
b92a66	393	public function has_text_part(&$part = null)
5c26bd	394	{
AM	395	// check all message parts
574928	396	foreach ($this->mime_parts as $part) {
5c26bd	397	if ($part->mimetype == 'text/plain') {
0ef894	398	// Skip if part is an attachment, don't use is_attachment() here
AM	399	if ($part->filename) {
323fa2	400	continue;
AM	401	}
	402
	403	if (!$this->check_context($part)) {
5c26bd	404	continue;
AM	405	}
	406
	407	$level = explode('.', $part->mime_id);
	408
	409	// Check if the part belongs to higher-level's alternative/related
	410	while (array_pop($level) !== null) {
	411	if (!count($level)) {
	412	return true;
	413	}
	414
	415	$parent = $this->mime_parts[join('.', $level)];
	416	if ($parent->mimetype != 'multipart/alternative' && $parent->mimetype != 'multipart/related') {
	417	continue 2;
	418	}
	419	}
	420
	421	if ($part->size) {
	422	return true;
	423	}
33423a	424	}
d311d8	425	}
A	426
b92a66	427	$part = null;
AM	428
d311d8	429	return false;
A	430	}
	431
	432	/**
	433	* Return the first HTML part of this message
	434	*
b92a66	435	* @param rcube_message_part &$part Reference to the part if found
AM	436	* @param bool $enriched Enables checking for text/enriched parts too
	437	*
d311d8	438	* @return string HTML message part content
A	439	*/
b92a66	440	public function first_html_part(&$part = null, $enriched = false)
d311d8	441	{
b92a66	442	if ($this->has_html_part($enriched, $part)) {
AM	443	$body = $this->get_part_body($part->mime_id, true);
	444
	445	if ($part->mimetype == 'text/enriched') {
	446	$body = rcube_enriched::to_html($body);
d311d8	447	}
b92a66	448
AM	449	return $body;
d311d8	450	}
A	451	}
	452
	453	/**
b92a66	454	* Return the first text part of this message.
AM	455	* If there's no text/plain part but $strict=true and text/html part
	456	* exists, it will be returned in text/plain format.
d311d8	457	*
b92a66	458	* @param rcube_message_part &$part Reference to the part if found
AM	459	* @param bool $strict Check only text/plain parts
	460	*
d311d8	461	* @return string Plain text message/part content
A	462	*/
b92a66	463	public function first_text_part(&$part = null, $strict = false)
d311d8	464	{
A	465	// no message structure, return complete body
b92a66	466	if (empty($this->parts)) {
d311d8	467	return $this->body;
A	468	}
	469
b92a66	470	if ($this->has_text_part($part)) {
AM	471	return $this->get_part_body($part->mime_id, true);
	472	}
	473
	474	if (!$strict && ($body = $this->first_html_part($part, true))) {
	475	// create instance of html2text class
	476	$h2t = new rcube_html2text($body);
	477	return $h2t->get_text();
	478	}
d311d8	479	}
A	480
	481	/**
3efc74	482	* Checks if part of the message is an attachment (or part of it)
AM	483	*
	484	* @param rcube_message_part $part Message part
	485	*
	486	* @return bool True if the part is an attachment part
	487	*/
	488	public function is_attachment($part)
	489	{
	490	foreach ($this->attachments as $att_part) {
	491	if ($att_part->mime_id == $part->mime_id) {
	492	return true;
	493	}
	494
	495	// check if the part is a subpart of another attachment part (message/rfc822)
	496	if ($att_part->mimetype == 'message/rfc822') {
	497	if (in_array($part, (array)$att_part->parts)) {
	498	return true;
	499	}
	500	}
	501	}
	502
	503	return false;
	504	}
	505
	506	/**
f7f75f	507	* In a multipart/encrypted encrypted message,
TB	508	* find the encrypted message payload part.
	509	*
	510	* @return rcube_message_part
	511	*/
	512	public function get_multipart_encrypted_part()
	513	{
	514	foreach ($this->mime_parts as $mime_id => $mpart) {
	515	if ($mpart->mimetype == 'multipart/encrypted') {
	516	$this->pgp_mime = true;
	517	}
	518	if ($this->pgp_mime && ($mpart->mimetype == 'application/octet-stream' \|\|
	519	(!empty($mpart->filename) && $mpart->filename != 'version.txt'))) {
	520	$this->encrypted_part = $mime_id;
	521	return $mpart;
	522	}
	523	}
	524
	525	return false;
	526	}
	527
	528	/**
8b92d2	529	* Read the message structure returend by the IMAP server
d311d8	530	* and build flat lists of content parts and attachments
A	531	*
5c461b	532	* @param rcube_message_part $structure Message structure node
A	533	* @param bool $recursive True when called recursively
d311d8	534	*/
A	535	private function parse_structure($structure, $recursive = false)
	536	{
	537	// real content-type of message/rfc822 part
a8a72e	538	if ($structure->mimetype == 'message/rfc822' && $structure->real_mimetype) {
5ced9c	539	$mimetype = $structure->real_mimetype;
a8a72e	540
TB	541	// parse headers from message/rfc822 part
7ae7cd	542	if (!isset($structure->headers['subject']) && !isset($structure->headers['from'])) {
48ba44	543	list($headers, ) = explode("\r\n\r\n", $this->get_part_body($structure->mime_id, false, 32768));
a8a72e	544	$structure->headers = rcube_mime::parse_headers($headers);
323fa2	545
AM	546	if ($this->context == $structure->mime_id) {
	547	$this->headers = rcube_message_header::from_array($structure->headers);
	548	}
a8a72e	549	}
TB	550	}
9af8e2	551	else {
5ced9c	552	$mimetype = $structure->mimetype;
9af8e2	553	}
d311d8	554
A	555	// show message headers
ddfdd8	556	if ($recursive && is_array($structure->headers) &&
323fa2	557	(isset($structure->headers['subject']) \|\| $structure->headers['from'] \|\| $structure->headers['to'])
AM	558	) {
d311d8	559	$c = new stdClass;
A	560	$c->type = 'headers';
c5d7c9	561	$c->headers = $structure->headers;
323fa2	562	$this->add_part($c);
d311d8	563	}
5ced9c	564
A	565	// Allow plugins to handle message parts
	566	$plugin = $this->app->plugins->exec_hook('message_part_structure',
	567	array('object' => $this, 'structure' => $structure,
	568	'mimetype' => $mimetype, 'recursive' => $recursive));
	569
9af8e2	570	if ($plugin['abort']) {
5ced9c	571	return;
9af8e2	572	}
5ced9c	573
A	574	$structure = $plugin['structure'];
9af8e2	575	$mimetype = $plugin['mimetype'];
AM	576	$recursive = $plugin['recursive'];
	577
	578	list($message_ctype_primary, $message_ctype_secondary) = explode('/', $mimetype);
d311d8	579
A	580	// print body if message doesn't have multiple parts
	581	if ($message_ctype_primary == 'text' && !$recursive) {
c23dc8	582	// parts with unsupported type add to attachments list
AM	583	if (!in_array($message_ctype_secondary, array('plain', 'html', 'enriched'))) {
323fa2	584	$this->add_part($structure, 'attachment');
c23dc8	585	return;
AM	586	}
	587
d311d8	588	$structure->type = 'content';
323fa2	589	$this->add_part($structure);
8757f5	590
d311d8	591	// Parse simple (plain text) message body
c23dc8	592	if ($message_ctype_secondary == 'plain') {
d311d8	593	foreach ((array)$this->uu_decode($structure) as $uupart) {
A	594	$this->mime_parts[$uupart->mime_id] = $uupart;
323fa2	595	$this->add_part($uupart, 'attachment');
d311d8	596	}
c23dc8	597	}
d311d8	598	}
A	599	// the same for pgp signed messages
	600	else if ($mimetype == 'application/pgp' && !$recursive) {
	601	$structure->type = 'content';
323fa2	602	$this->add_part($structure);
d311d8	603	}
e730cd	604	// message contains (more than one!) alternative parts
A	605	else if ($mimetype == 'multipart/alternative'
	606	&& is_array($structure->parts) && count($structure->parts) > 1
	607	) {
c5d7c9	608	// get html/plaintext parts, other add to attachments list
d311d8	609	foreach ($structure->parts as $p => $sub_part) {
A	610	$sub_mimetype = $sub_part->mimetype;
cb0f03	611	$is_multipart = preg_match('/^multipart\/(related\|relative\|mixed\|alternative)/', $sub_mimetype);
8757f5	612
5fbfde	613	// skip empty text parts
c5d7c9	614	if (!$sub_part->size && !$is_multipart) {
5f4095	615	continue;
5fbfde	616	}
5f4095	617
170702	618	// We've encountered (malformed) messages with more than
AM	619	// one text/plain or text/html part here. There's no way to choose
	620	// which one is better, so we'll display first of them and add
	621	// others as attachments (#1489358)
	622
d311d8	623	// check if sub part is
c5d7c9	624	if ($is_multipart)
AM	625	$related_part = $p;
170702	626	else if ($sub_mimetype == 'text/plain' && !$plain_part)
d311d8	627	$plain_part = $p;
5b737d	628	else if ($sub_mimetype == 'text/html' && !$html_part) {
d311d8	629	$html_part = $p;
5b737d	630	$this->got_html_part = true;
AM	631	}
170702	632	else if ($sub_mimetype == 'text/enriched' && !$enriched_part)
d311d8	633	$enriched_part = $p;
170702	634	else {
AM	635	// add unsupported/unrecognized parts to attachments list
323fa2	636	$this->add_part($sub_part, 'attachment');
170702	637	}
d311d8	638	}
A	639
	640	// parse related part (alternative part could be in here)
	641	if ($related_part !== null && !$this->parse_alternative) {
	642	$this->parse_alternative = true;
	643	$this->parse_structure($structure->parts[$related_part], true);
	644	$this->parse_alternative = false;
8757f5	645
d311d8	646	// if plain part was found, we should unset it if html is preferred
A	647	if ($this->opt['prefer_html'] && count($this->parts))
	648	$plain_part = null;
	649	}
	650
	651	// choose html/plain part to print
	652	if ($html_part !== null && $this->opt['prefer_html']) {
c5d7c9	653	$print_part = $structure->parts[$html_part];
d311d8	654	}
A	655	else if ($enriched_part !== null) {
c5d7c9	656	$print_part = $structure->parts[$enriched_part];
d311d8	657	}
A	658	else if ($plain_part !== null) {
c5d7c9	659	$print_part = $structure->parts[$plain_part];
d311d8	660	}
A	661
	662	// add the right message body
	663	if (is_object($print_part)) {
	664	$print_part->type = 'content';
323fa2	665	$this->add_part($print_part);
d311d8	666	}
A	667	// show plaintext warning
	668	else if ($html_part !== null && empty($this->parts)) {
	669	$c = new stdClass;
	670	$c->type = 'content';
	671	$c->ctype_primary = 'text';
	672	$c->ctype_secondary = 'plain';
0c2596	673	$c->mimetype = 'text/plain';
A	674	$c->realtype = 'text/html';
d311d8	675
323fa2	676	$this->add_part($c);
d311d8	677	}
A	678	}
	679	// this is an ecrypted message -> create a plaintext body with the according message
	680	else if ($mimetype == 'multipart/encrypted') {
	681	$p = new stdClass;
	682	$p->type = 'content';
	683	$p->ctype_primary = 'text';
	684	$p->ctype_secondary = 'plain';
0c2596	685	$p->mimetype = 'text/plain';
A	686	$p->realtype = 'multipart/encrypted';
ef2915	687	$p->mime_id = $structure->mime_id;
c054ec	688
323fa2	689	$this->add_part($p);
ef2915	690
TB	691	// add encrypted payload part as attachment
	692	if (is_array($structure->parts)) {
	693	for ($i=0; $i < count($structure->parts); $i++) {
	694	$subpart = $structure->parts[$i];
	695	if ($subpart->mimetype == 'application/octet-stream' \|\| !empty($subpart->filename)) {
323fa2	696	$this->add_part($subpart, 'attachment');
ef2915	697	}
TB	698	}
	699	}
d311d8	700	}
ee89c6	701	// this is an S/MIME ecrypted message -> create a plaintext body with the according message
AM	702	else if ($mimetype == 'application/pkcs7-mime') {
	703	$p = new stdClass;
	704	$p->type = 'content';
	705	$p->ctype_primary = 'text';
	706	$p->ctype_secondary = 'plain';
	707	$p->mimetype = 'text/plain';
	708	$p->realtype = 'application/pkcs7-mime';
ef2915	709	$p->mime_id = $structure->mime_id;
ee89c6	710
323fa2	711	$this->add_part($p);
ef2915	712
TB	713	if (!empty($structure->filename)) {
323fa2	714	$this->add_part($structure, 'attachment');
ef2915	715	}
ee89c6	716	}
d311d8	717	// message contains multiple parts
A	718	else if (is_array($structure->parts) && !empty($structure->parts)) {
	719	// iterate over parts
	720	for ($i=0; $i < count($structure->parts); $i++) {
	721	$mail_part = &$structure->parts[$i];
	722	$primary_type = $mail_part->ctype_primary;
	723	$secondary_type = $mail_part->ctype_secondary;
be3460	724	$part_mimetype = $mail_part->mimetype;
8fa58e	725
be3460	726	// multipart/alternative or message/rfc822
AM	727	if ($primary_type == 'multipart' \|\| $part_mimetype == 'message/rfc822') {
d311d8	728	$this->parse_structure($mail_part, true);
A	729
	730	// list message/rfc822 as attachment as well (mostly .eml)
be3460	731	if ($primary_type == 'message' && !empty($mail_part->filename)) {
323fa2	732	$this->add_part($mail_part, 'attachment');
be3460	733	}
d311d8	734	}
f22ea7	735	// part text/[plain\|html] or delivery status
d311d8	736	else if ((($part_mimetype == 'text/plain' \|\| $part_mimetype == 'text/html') && $mail_part->disposition != 'attachment') \|\|
f22ea7	737	in_array($part_mimetype, array('message/delivery-status', 'text/rfc822-headers', 'message/disposition-notification'))
d311d8	738	) {
1a2f83	739	// Allow plugins to handle also this part
A	740	$plugin = $this->app->plugins->exec_hook('message_part_structure',
	741	array('object' => $this, 'structure' => $mail_part,
	742	'mimetype' => $part_mimetype, 'recursive' => true));
	743
be3460	744	if ($plugin['abort']) {
1a2f83	745	continue;
be3460	746	}
1a2f83	747
9c299e	748	if ($part_mimetype == 'text/html' && $mail_part->size) {
5b737d	749	$this->got_html_part = true;
63f9de	750	}
A	751
1a2f83	752	$mail_part = $plugin['structure'];
A	753	list($primary_type, $secondary_type) = explode('/', $plugin['mimetype']);
	754
d311d8	755	// add text part if it matches the prefs
A	756	if (!$this->parse_alternative \|\|
	757	($secondary_type == 'html' && $this->opt['prefer_html']) \|\|
	758	($secondary_type == 'plain' && !$this->opt['prefer_html'])
	759	) {
	760	$mail_part->type = 'content';
323fa2	761	$this->add_part($mail_part);
d311d8	762	}
fd371a	763
d311d8	764	// list as attachment as well
f7c11e	765	if (!empty($mail_part->filename)) {
323fa2	766	$this->add_part($mail_part, 'attachment');
f7c11e	767	}
d311d8	768	}
A	769	// ignore "virtual" protocol parts
	770	else if ($primary_type == 'protocol') {
	771	continue;
	772	}
	773	// part is Microsoft Outlook TNEF (winmail.dat)
	774	else if ($part_mimetype == 'application/ms-tnef') {
292292	775	$tnef_parts = (array) $this->tnef_decode($mail_part);
AM	776	foreach ($tnef_parts as $tpart) {
d311d8	777	$this->mime_parts[$tpart->mime_id] = $tpart;
323fa2	778	$this->add_part($tpart, 'attachment');
d311d8	779	}
292292	780
AM	781	// add winmail.dat to the list if it's content is unknown
	782	if (empty($tnef_parts) && !empty($mail_part->filename)) {
	783	$this->mime_parts[$mail_part->mime_id] = $mail_part;
323fa2	784	$this->add_part($mail_part, 'attachment');
292292	785	}
d311d8	786	}
A	787	// part is a file/attachment
	788	else if (preg_match('/^(inline\|attach)/', $mail_part->disposition) \|\|
8794f1	789	$mail_part->headers['content-id'] \|\|
A	790	($mail_part->filename &&
	791	(empty($mail_part->disposition) \|\| preg_match('/^[a-z0-9!#$&.+^_-]+$/i', $mail_part->disposition)))
d311d8	792	) {
A	793	// skip apple resource forks
	794	if ($message_ctype_secondary == 'appledouble' && $secondary_type == 'applefile')
	795	continue;
	796
	797	// part belongs to a related message and is linked
cb0f03	798	if (preg_match('/^multipart\/(related\|relative)/', $mimetype)
be3460	799	&& ($mail_part->headers['content-id'] \|\| $mail_part->headers['content-location'])
AM	800	) {
d311d8	801	if ($mail_part->headers['content-id'])
A	802	$mail_part->content_id = preg_replace(array('/^</', '/>$/'), '', $mail_part->headers['content-id']);
	803	if ($mail_part->headers['content-location'])
	804	$mail_part->content_location = $mail_part->headers['content-base'] . $mail_part->headers['content-location'];
	805
323fa2	806	$this->add_part($mail_part, 'inline');
d311d8	807	}
b38925	808	// regular attachment with valid content type
A	809	// (content-type name regexp according to RFC4288.4.2)
2ae58f	810	else if (preg_match('/^[a-z0-9!#$&.+^_-]+\/[a-z0-9!#$&.+^_-]+$/i', $part_mimetype)) {
323fa2	811	$this->add_part($mail_part, 'attachment');
b38925	812	}
A	813	// attachment with invalid content type
	814	// replace malformed content type with application/octet-stream (#1487767)
	815	else if ($mail_part->filename) {
	816	$mail_part->ctype_primary = 'application';
	817	$mail_part->ctype_secondary = 'octet-stream';
	818	$mail_part->mimetype = 'application/octet-stream';
	819
323fa2	820	$this->add_part($mail_part, 'attachment');
d311d8	821	}
8757f5	822	}
98e461	823	// calendar part not marked as attachment (#1490325)
AM	824	else if ($part_mimetype == 'text/calendar') {
	825	if (!$mail_part->filename) {
	826	$mail_part->filename = 'calendar.ics';
	827	}
	828
323fa2	829	$this->add_part($mail_part, 'attachment');
98e461	830	}
d311d8	831	}
A	832
	833	// if this was a related part try to resolve references
cb0f03	834	if (preg_match('/^multipart\/(related\|relative)/', $mimetype) && sizeof($this->inline_parts)) {
d311d8	835	$a_replaces = array();
89d19c	836	$img_regexp = '/^image\/(gif\|jpe?g\|png\|tiff\|bmp\|svg)/';
d311d8	837
A	838	foreach ($this->inline_parts as $inline_object) {
a021d6	839	$part_url = $this->get_part_url($inline_object->mime_id, $inline_object->ctype_primary);
8cfba1	840	if (isset($inline_object->content_id))
d311d8	841	$a_replaces['cid:'.$inline_object->content_id] = $part_url;
63f9de	842	if ($inline_object->content_location) {
d311d8	843	$a_replaces[$inline_object->content_location] = $part_url;
63f9de	844	}
89d19c	845
A	846	if (!empty($inline_object->filename)) {
	847	// MS Outlook sends sometimes non-related attachments as related
	848	// In this case multipart/related message has only one text part
	849	// We'll add all such attachments to the attachments list
5b737d	850	if (!isset($this->got_html_part)) {
323fa2	851	$this->add_part($inline_object, 'attachment');
89d19c	852	}
A	853	// MS Outlook sometimes also adds non-image attachments as related
	854	// We'll add all such attachments to the attachments list
	855	// Warning: some browsers support pdf in <img/>
	856	else if (!preg_match($img_regexp, $inline_object->mimetype)) {
323fa2	857	$this->add_part($inline_object, 'attachment');
89d19c	858	}
A	859	// @TODO: we should fetch HTML body and find attachment's content-id
	860	// to handle also image attachments without reference in the body
	861	// @TODO: should we list all image attachments in text mode?
02b6e6	862	}
d311d8	863	}
A	864
	865	// add replace array to each content part
	866	// (will be applied later when part body is available)
	867	foreach ($this->parts as $i => $part) {
	868	if ($part->type == 'content')
	869	$this->parts[$i]->replaces = $a_replaces;
	870	}
	871	}
	872	}
	873	// message is a single part non-text
	874	else if ($structure->filename) {
323fa2	875	$this->add_part($structure, $attachment);
d311d8	876	}
3e58bf	877	// message is a single part non-text (without filename)
A	878	else if (preg_match('/application\//i', $mimetype)) {
323fa2	879	$this->add_part($structure, 'attachment');
c5d7c9	880	}
AM	881	}
	882
	883	/**
323fa2	884	* Fill a flat array with references to all parts, indexed by part numbers
d311d8	885	*
5c461b	886	* @param rcube_message_part $part Message body structure
d311d8	887	*/
A	888	private function get_mime_numbers(&$part)
	889	{
	890	if (strlen($part->mime_id))
	891	$this->mime_parts[$part->mime_id] = &$part;
f19d86	892
d311d8	893	if (is_array($part->parts))
A	894	for ($i=0; $i<count($part->parts); $i++)
	895	$this->get_mime_numbers($part->parts[$i]);
	896	}
	897
	898	/**
323fa2	899	* Add a part to object parts array(s) (with context check)
AM	900	*/
	901	private function add_part($part, $type = null)
	902	{
	903	if ($this->check_context($part)) {
	904	switch ($type) {
	905	case 'inline': $this->inline_parts[] = $part; break;
	906	case 'attachment': $this->attachments[] = $part; break;
	907	default: $this->parts[] = $part; break;
	908	}
	909	}
	910	}
	911
	912	/**
	913	* Check if specified part belongs to the current context
	914	*/
	915	private function check_context($part)
	916	{
	917	return $this->context === null \|\| strpos($part->mime_id, $this->context . '.') === 0;
	918	}
	919
	920	/**
d311d8	921	* Decode a Microsoft Outlook TNEF part (winmail.dat)
A	922	*
5c461b	923	* @param rcube_message_part $part Message part to decode
A	924	* @return array
d311d8	925	*/
A	926	function tnef_decode(&$part)
	927	{
48ba44	928	// @TODO: attachment may be huge, handle body via file
AM	929	$body = $this->get_part_body($part->mime_id);
2883fc	930	$tnef = new rcube_tnef_decoder;
48ba44	931	$tnef_arr = $tnef->decompress($body);
AM	932	$parts = array();
d311d8	933
48ba44	934	unset($body);
d311d8	935
A	936	foreach ($tnef_arr as $pid => $winatt) {
	937	$tpart = new rcube_message_part;
	938
2da830	939	$tpart->filename = $this->fix_attachment_name(trim($winatt['name']), $part);
d311d8	940	$tpart->encoding = 'stream';
f19d86	941	$tpart->ctype_primary = trim(strtolower($winatt['type']));
A	942	$tpart->ctype_secondary = trim(strtolower($winatt['subtype']));
d311d8	943	$tpart->mimetype = $tpart->ctype_primary . '/' . $tpart->ctype_secondary;
A	944	$tpart->mime_id = 'winmail.' . $part->mime_id . '.' . $pid;
	945	$tpart->size = $winatt['size'];
	946	$tpart->body = $winatt['stream'];
	947
	948	$parts[] = $tpart;
	949	unset($tnef_arr[$pid]);
	950	}
f19d86	951
d311d8	952	return $parts;
A	953	}
	954
	955	/**
	956	* Parse message body for UUencoded attachments bodies
	957	*
5c461b	958	* @param rcube_message_part $part Message part to decode
A	959	* @return array
d311d8	960	*/
A	961	function uu_decode(&$part)
	962	{
48ba44	963	// @TODO: messages may be huge, handle body via file
AM	964	$part->body = $this->get_part_body($part->mime_id);
	965	$parts = array();
	966	$pid = 0;
d311d8	967
A	968	// FIXME: line length is max.65?
48ba44	969	$uu_regexp_begin = '/begin [0-7]{3,4} ([^\r\n]+)\r?\n/s';
AM	970	$uu_regexp_end = '/`\r?\nend((\r?\n)\|($))/s';
d311d8	971
48ba44	972	while (preg_match($uu_regexp_begin, $part->body, $matches, PREG_OFFSET_CAPTURE)) {
AM	973	$startpos = $matches[0][1];
d311d8	974
48ba44	975	if (!preg_match($uu_regexp_end, $part->body, $m, PREG_OFFSET_CAPTURE, $startpos)) {
AM	976	break;
d311d8	977	}
14f22f	978
48ba44	979	$endpos = $m[0][1];
AM	980	$begin_len = strlen($matches[0][0]);
	981	$end_len = strlen($m[0][0]);
	982
	983	// extract attachment body
	984	$filebody = substr($part->body, $startpos + $begin_len, $endpos - $startpos - $begin_len - 1);
	985	$filebody = str_replace("\r\n", "\n", $filebody);
	986
	987	// remove attachment body from the message body
	988	$part->body = substr_replace($part->body, '', $startpos, $endpos + $end_len - $startpos);
2268aa	989	// mark body as modified so it will not be cached by rcube_imap_cache
AM	990	$part->body_modified = true;
48ba44	991
AM	992	// add attachments to the structure
	993	$uupart = new rcube_message_part;
	994	$uupart->filename = trim($matches[1][0]);
	995	$uupart->encoding = 'stream';
	996	$uupart->body = convert_uudecode($filebody);
	997	$uupart->size = strlen($uupart->body);
	998	$uupart->mime_id = 'uu.' . $part->mime_id . '.' . $pid;
	999
	1000	$ctype = rcube_mime::file_content_type($uupart->body, $uupart->filename, 'application/octet-stream', true);
	1001	$uupart->mimetype = $ctype;
	1002	list($uupart->ctype_primary, $uupart->ctype_secondary) = explode('/', $ctype);
	1003
	1004	$parts[] = $uupart;
	1005	$pid++;
d311d8	1006	}
f19d86	1007
d311d8	1008	return $parts;
A	1009	}
b91f04	1010
2da830	1011	/**
AM	1012	* Fix attachment name encoding if needed/possible
	1013	*/
	1014	protected function fix_attachment_name($name, $part)
	1015	{
	1016	if ($name == rcube_charset::clean($name)) {
	1017	return $name;
	1018	}
	1019
	1020	// find charset from part or its parent(s)
	1021	if ($part->charset) {
	1022	$charsets[] = $part->charset;
	1023	}
	1024	else {
	1025	// check first part (common case)
	1026	$n = strpos($part->mime_id, '.') ? preg_replace('/\.[0-9]+$/', '', $part->mime_id) . '.1' : 1;
	1027	if (($_part = $this->mime_parts[$n]) && $_part->charset) {
	1028	$charsets[] = $_part->charset;
	1029	}
	1030
	1031	// check parents' charset
	1032	$items = explode('.', $part->mime_id);
	1033	for ($i = count($items)-1; $i > 0; $i--) {
	1034	$last = array_pop($items);
	1035	$parent = $this->mime_parts[join('.', $items)];
	1036
	1037	if ($parent && $parent->charset) {
	1038	$charsets[] = $parent->charset;
	1039	}
	1040	}
	1041	}
	1042
	1043	if ($this->headers->charset) {
	1044	$charsets[] = $this->headers->charset;
	1045	}
	1046
	1047	if (empty($charsets)) {
	1048	$rcube = rcube::get_instance();
	1049	$charsets[] = rcube_charset::detect($name, $rcube->config->get('default_charset', RCUBE_CHARSET));
	1050	}
	1051
	1052	foreach (array_unique($charsets) as $charset) {
	1053	$_name = rcube_charset::convert($name, $charset);
	1054
	1055	if ($_name == rcube_charset::clean($_name)) {
	1056	if (!$part->charset) {
	1057	$part->charset = $charset;
	1058	}
	1059
	1060	return $_name;
	1061	}
	1062	}
	1063
	1064	return $name;
	1065	}
b91f04	1066
T	1067	/**
	1068	* Deprecated methods (to be removed)
	1069	*/
	1070
	1071	public static function unfold_flowed($text)
	1072	{
	1073	return rcube_mime::unfold_flowed($text);
	1074	}
	1075
	1076	public static function format_flowed($text, $length = 72)
	1077	{
	1078	return rcube_mime::format_flowed($text, $length);
	1079	}
8fa58e	1080	}