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diff --git a/program/include/rcube_message.php b/program/include/rcube_message.php
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-<?php
-
-/*
- +-----------------------------------------------------------------------+
- | program/include/rcube_message.php |
- | |
- | This file is part of the Roundcube Webmail client |
- | Copyright (C) 2008-2010, The Roundcube Dev Team |
- | |
- | Licensed under the GNU General Public License version 3 or |
- | any later version with exceptions for skins & plugins. |
- | See the README file for a full license statement. |
- | |
- | PURPOSE: |
- | Logical representation of a mail message with all its data |
- | and related functions |
- +-----------------------------------------------------------------------+
- | Author: Thomas Bruederli <roundcube@gmail.com> |
- +-----------------------------------------------------------------------+
-*/
-
-
-/**
- * Logical representation of a mail message with all its data
- * and related functions
- *
- * @package Framework
- * @subpackage Storage
- * @author Thomas Bruederli <roundcube@gmail.com>
- */
-class rcube_message
-{
- /**
- * Instace of framework class.
- *
- * @var rcube
- */
- private $app;
-
- /**
- * Instance of storage class
- *
- * @var rcube_storage
- */
- private $storage;
-
- /**
- * Instance of mime class
- *
- * @var rcube_mime
- */
- private $mime;
- private $opt = array();
- private $parse_alternative = false;
-
- public $uid;
- public $folder;
- public $headers;
- public $parts = array();
- public $mime_parts = array();
- public $inline_parts = array();
- public $attachments = array();
- public $subject = '';
- public $sender = null;
- public $is_safe = false;
-
-
- /**
- * __construct
- *
- * Provide a uid, and parse message structure.
- *
- * @param string $uid The message UID.
- * @param string $folder Folder name
- *
- * @see self::$app, self::$storage, self::$opt, self::$parts
- */
- function __construct($uid, $folder = null)
- {
- $this->uid = $uid;
- $this->app = rcube::get_instance();
- $this->storage = $this->app->get_storage();
- $this->folder = strlen($folder) ? $folder : $this->storage->get_folder();
- $this->storage->set_options(array('all_headers' => true));
-
- // Set current folder
- $this->storage->set_folder($this->folder);
-
- $this->headers = $this->storage->get_message($uid);
-
- if (!$this->headers)
- return;
-
- $this->mime = new rcube_mime($this->headers->charset);
-
- $this->subject = $this->mime->decode_mime_string($this->headers->subject);
- list(, $this->sender) = each($this->mime->decode_address_list($this->headers->from, 1));
-
- $this->set_safe((intval($_GET['_safe']) || $_SESSION['safe_messages'][$uid]));
- $this->opt = array(
- 'safe' => $this->is_safe,
- 'prefer_html' => $this->app->config->get('prefer_html'),
- 'get_url' => $this->app->url(array(
- 'action' => 'get',
- 'mbox' => $this->storage->get_folder(),
- 'uid' => $uid))
- );
-
- if (!empty($this->headers->structure)) {
- $this->get_mime_numbers($this->headers->structure);
- $this->parse_structure($this->headers->structure);
- }
- else {
- $this->body = $this->storage->get_body($uid);
- }
-
- // notify plugins and let them analyze this structured message object
- $this->app->plugins->exec_hook('message_load', array('object' => $this));
- }
-
-
- /**
- * Return a (decoded) message header
- *
- * @param string $name Header name
- * @param bool $row Don't mime-decode the value
- * @return string Header value
- */
- public function get_header($name, $raw = false)
- {
- if (empty($this->headers))
- return null;
-
- if ($this->headers->$name)
- $value = $this->headers->$name;
- else if ($this->headers->others[$name])
- $value = $this->headers->others[$name];
-
- return $raw ? $value : $this->mime->decode_header($value);
- }
-
-
- /**
- * Set is_safe var and session data
- *
- * @param bool $safe enable/disable
- */
- public function set_safe($safe = true)
- {
- $this->is_safe = $safe;
- $_SESSION['safe_messages'][$this->uid] = $this->is_safe;
- }
-
-
- /**
- * Compose a valid URL for getting a message part
- *
- * @param string $mime_id Part MIME-ID
- * @return string URL or false if part does not exist
- */
- public function get_part_url($mime_id, $embed = false)
- {
- if ($this->mime_parts[$mime_id])
- return $this->opt['get_url'] . '&_part=' . $mime_id . ($embed ? '&_embed=1' : '');
- else
- return false;
- }
-
-
- /**
- * Get content of a specific part of this message
- *
- * @param string $mime_id Part MIME-ID
- * @param resource $fp File pointer to save the message part
- * @param boolean $skip_charset_conv Disables charset conversion
- *
- * @return string Part content
- */
- public function get_part_content($mime_id, $fp = null, $skip_charset_conv = false)
- {
- if ($part = $this->mime_parts[$mime_id]) {
- // stored in message structure (winmail/inline-uuencode)
- if (!empty($part->body) || $part->encoding == 'stream') {
- if ($fp) {
- fwrite($fp, $part->body);
- }
- return $fp ? true : $part->body;
- }
-
- // get from IMAP
- $this->storage->set_folder($this->folder);
-
- return $this->storage->get_message_part($this->uid, $mime_id, $part, NULL, $fp, $skip_charset_conv);
- }
- }
-
-
- /**
- * Determine if the message contains a HTML part
- *
- * @param bool $recursive Enables checking in all levels of the structure
- * @param bool $enriched Enables checking for text/enriched parts too
- *
- * @return bool True if a HTML is available, False if not
- */
- function has_html_part($recursive = true, $enriched = false)
- {
- // check all message parts
- foreach ($this->parts as $part) {
- if ($part->mimetype == 'text/html' || ($enriched && $part->mimetype == 'text/enriched')) {
- // Level check, we'll skip e.g. HTML attachments
- if (!$recursive) {
- $level = explode('.', $part->mime_id);
-
- // Skip if level too deep or part has a file name
- if (count($level) > 2 || $part->filename) {
- continue;
- }
-
- // HTML part can be on the lower level, if not...
- if (count($level) > 1) {
- array_pop($level);
- $parent = $this->mime_parts[join('.', $level)];
- // ... parent isn't multipart/alternative or related
- if ($parent->mimetype != 'multipart/alternative' && $parent->mimetype != 'multipart/related') {
- continue;
- }
- }
- }
-
- return true;
- }
- }
-
- return false;
- }
-
-
- /**
- * Return the first HTML part of this message
- *
- * @return string HTML message part content
- */
- function first_html_part()
- {
- // check all message parts
- foreach ($this->mime_parts as $pid => $part) {
- if ($part->mimetype == 'text/html') {
- return $this->get_part_content($pid);
- }
- }
- }
-
-
- /**
- * Return the first text part of this message
- *
- * @param rcube_message_part $part Reference to the part if found
- * @return string Plain text message/part content
- */
- function first_text_part(&$part=null)
- {
- // no message structure, return complete body
- if (empty($this->parts))
- return $this->body;
-
- // check all message parts
- foreach ($this->mime_parts as $mime_id => $part) {
- if ($part->mimetype == 'text/plain') {
- return $this->get_part_content($mime_id);
- }
- else if ($part->mimetype == 'text/html') {
- $out = $this->get_part_content($mime_id);
-
- // create instance of html2text class
- $txt = new html2text($out);
- return $txt->get_text();
- }
- }
-
- $part = null;
- return null;
- }
-
-
- /**
- * Checks if part of the message is an attachment (or part of it)
- *
- * @param rcube_message_part $part Message part
- *
- * @return bool True if the part is an attachment part
- */
- public function is_attachment($part)
- {
- foreach ($this->attachments as $att_part) {
- if ($att_part->mime_id == $part->mime_id) {
- return true;
- }
-
- // check if the part is a subpart of another attachment part (message/rfc822)
- if ($att_part->mimetype == 'message/rfc822') {
- if (in_array($part, (array)$att_part->parts)) {
- return true;
- }
- }
- }
-
- return false;
- }
-
-
- /**
- * Read the message structure returend by the IMAP server
- * and build flat lists of content parts and attachments
- *
- * @param rcube_message_part $structure Message structure node
- * @param bool $recursive True when called recursively
- */
- private function parse_structure($structure, $recursive = false)
- {
- // real content-type of message/rfc822 part
- if ($structure->mimetype == 'message/rfc822' && $structure->real_mimetype)
- $mimetype = $structure->real_mimetype;
- else
- $mimetype = $structure->mimetype;
-
- // show message headers
- if ($recursive && is_array($structure->headers) && isset($structure->headers['subject'])) {
- $c = new stdClass;
- $c->type = 'headers';
- $c->headers = &$structure->headers;
- $this->parts[] = $c;
- }
-
- // Allow plugins to handle message parts
- $plugin = $this->app->plugins->exec_hook('message_part_structure',
- array('object' => $this, 'structure' => $structure,
- 'mimetype' => $mimetype, 'recursive' => $recursive));
-
- if ($plugin['abort'])
- return;
-
- $structure = $plugin['structure'];
- list($message_ctype_primary, $message_ctype_secondary) = explode('/', $plugin['mimetype']);
-
- // print body if message doesn't have multiple parts
- if ($message_ctype_primary == 'text' && !$recursive) {
- $structure->type = 'content';
- $this->parts[] = &$structure;
-
- // Parse simple (plain text) message body
- if ($message_ctype_secondary == 'plain')
- foreach ((array)$this->uu_decode($structure) as $uupart) {
- $this->mime_parts[$uupart->mime_id] = $uupart;
- $this->attachments[] = $uupart;
- }
- }
- // the same for pgp signed messages
- else if ($mimetype == 'application/pgp' && !$recursive) {
- $structure->type = 'content';
- $this->parts[] = &$structure;
- }
- // message contains (more than one!) alternative parts
- else if ($mimetype == 'multipart/alternative'
- && is_array($structure->parts) && count($structure->parts) > 1
- ) {
- // get html/plaintext parts
- $plain_part = $html_part = $print_part = $related_part = null;
-
- foreach ($structure->parts as $p => $sub_part) {
- $sub_mimetype = $sub_part->mimetype;
-
- // skip empty text parts
- if (!$sub_part->size && preg_match('#^text/(plain|html|enriched)$#', $sub_mimetype)) {
- continue;
- }
-
- // check if sub part is
- if ($sub_mimetype == 'text/plain')
- $plain_part = $p;
- else if ($sub_mimetype == 'text/html')
- $html_part = $p;
- else if ($sub_mimetype == 'text/enriched')
- $enriched_part = $p;
- else if (in_array($sub_mimetype, array('multipart/related', 'multipart/mixed', 'multipart/alternative')))
- $related_part = $p;
- }
-
- // parse related part (alternative part could be in here)
- if ($related_part !== null && !$this->parse_alternative) {
- $this->parse_alternative = true;
- $this->parse_structure($structure->parts[$related_part], true);
- $this->parse_alternative = false;
-
- // if plain part was found, we should unset it if html is preferred
- if ($this->opt['prefer_html'] && count($this->parts))
- $plain_part = null;
- }
-
- // choose html/plain part to print
- if ($html_part !== null && $this->opt['prefer_html']) {
- $print_part = &$structure->parts[$html_part];
- }
- else if ($enriched_part !== null) {
- $print_part = &$structure->parts[$enriched_part];
- }
- else if ($plain_part !== null) {
- $print_part = &$structure->parts[$plain_part];
- }
-
- // add the right message body
- if (is_object($print_part)) {
- $print_part->type = 'content';
- $this->parts[] = $print_part;
- }
- // show plaintext warning
- else if ($html_part !== null && empty($this->parts)) {
- $c = new stdClass;
- $c->type = 'content';
- $c->ctype_primary = 'text';
- $c->ctype_secondary = 'plain';
- $c->mimetype = 'text/plain';
- $c->realtype = 'text/html';
-
- $this->parts[] = $c;
- }
-
- // add html part as attachment
- if ($html_part !== null && $structure->parts[$html_part] !== $print_part) {
- $html_part = &$structure->parts[$html_part];
- $html_part->mimetype = 'text/html';
-
- $this->attachments[] = $html_part;
- }
- }
- // this is an ecrypted message -> create a plaintext body with the according message
- else if ($mimetype == 'multipart/encrypted') {
- $p = new stdClass;
- $p->type = 'content';
- $p->ctype_primary = 'text';
- $p->ctype_secondary = 'plain';
- $p->mimetype = 'text/plain';
- $p->realtype = 'multipart/encrypted';
-
- $this->parts[] = $p;
- }
- // message contains multiple parts
- else if (is_array($structure->parts) && !empty($structure->parts)) {
- // iterate over parts
- for ($i=0; $i < count($structure->parts); $i++) {
- $mail_part = &$structure->parts[$i];
- $primary_type = $mail_part->ctype_primary;
- $secondary_type = $mail_part->ctype_secondary;
-
- // real content-type of message/rfc822
- if ($mail_part->real_mimetype) {
- $part_orig_mimetype = $mail_part->mimetype;
- $part_mimetype = $mail_part->real_mimetype;
- list($primary_type, $secondary_type) = explode('/', $part_mimetype);
- }
- else
- $part_mimetype = $mail_part->mimetype;
-
- // multipart/alternative
- if ($primary_type == 'multipart') {
- $this->parse_structure($mail_part, true);
-
- // list message/rfc822 as attachment as well (mostly .eml)
- if ($part_orig_mimetype == 'message/rfc822' && !empty($mail_part->filename))
- $this->attachments[] = $mail_part;
- }
- // part text/[plain|html] or delivery status
- else if ((($part_mimetype == 'text/plain' || $part_mimetype == 'text/html') && $mail_part->disposition != 'attachment') ||
- in_array($part_mimetype, array('message/delivery-status', 'text/rfc822-headers', 'message/disposition-notification'))
- ) {
- // Allow plugins to handle also this part
- $plugin = $this->app->plugins->exec_hook('message_part_structure',
- array('object' => $this, 'structure' => $mail_part,
- 'mimetype' => $part_mimetype, 'recursive' => true));
-
- if ($plugin['abort'])
- continue;
-
- if ($part_mimetype == 'text/html' && $mail_part->size) {
- $got_html_part = true;
- }
-
- $mail_part = $plugin['structure'];
- list($primary_type, $secondary_type) = explode('/', $plugin['mimetype']);
-
- // add text part if it matches the prefs
- if (!$this->parse_alternative ||
- ($secondary_type == 'html' && $this->opt['prefer_html']) ||
- ($secondary_type == 'plain' && !$this->opt['prefer_html'])
- ) {
- $mail_part->type = 'content';
- $this->parts[] = $mail_part;
- }
-
- // list as attachment as well
- if (!empty($mail_part->filename)) {
- $this->attachments[] = $mail_part;
- }
- // list html part as attachment (here the part is most likely inside a multipart/related part)
- else if ($this->parse_alternative && ($secondary_type == 'html' && !$this->opt['prefer_html'])) {
- $this->attachments[] = $mail_part;
- }
- }
- // part message/*
- else if ($primary_type == 'message') {
- $this->parse_structure($mail_part, true);
-
- // list as attachment as well (mostly .eml)
- if (!empty($mail_part->filename))
- $this->attachments[] = $mail_part;
- }
- // ignore "virtual" protocol parts
- else if ($primary_type == 'protocol') {
- continue;
- }
- // part is Microsoft Outlook TNEF (winmail.dat)
- else if ($part_mimetype == 'application/ms-tnef') {
- foreach ((array)$this->tnef_decode($mail_part) as $tpart) {
- $this->mime_parts[$tpart->mime_id] = $tpart;
- $this->attachments[] = $tpart;
- }
- }
- // part is a file/attachment
- else if (preg_match('/^(inline|attach)/', $mail_part->disposition) ||
- $mail_part->headers['content-id'] ||
- ($mail_part->filename &&
- (empty($mail_part->disposition) || preg_match('/^[a-z0-9!#$&.+^_-]+$/i', $mail_part->disposition)))
- ) {
- // skip apple resource forks
- if ($message_ctype_secondary == 'appledouble' && $secondary_type == 'applefile')
- continue;
-
- // part belongs to a related message and is linked
- if ($mimetype == 'multipart/related'
- && ($mail_part->headers['content-id'] || $mail_part->headers['content-location'])) {
- if ($mail_part->headers['content-id'])
- $mail_part->content_id = preg_replace(array('/^</', '/>$/'), '', $mail_part->headers['content-id']);
- if ($mail_part->headers['content-location'])
- $mail_part->content_location = $mail_part->headers['content-base'] . $mail_part->headers['content-location'];
-
- $this->inline_parts[] = $mail_part;
- }
- // attachment encapsulated within message/rfc822 part needs further decoding (#1486743)
- else if ($part_orig_mimetype == 'message/rfc822') {
- $this->parse_structure($mail_part, true);
-
- // list as attachment as well (mostly .eml)
- if (!empty($mail_part->filename))
- $this->attachments[] = $mail_part;
- }
- // regular attachment with valid content type
- // (content-type name regexp according to RFC4288.4.2)
- else if (preg_match('/^[a-z0-9!#$&.+^_-]+\/[a-z0-9!#$&.+^_-]+$/i', $part_mimetype)) {
- if (!$mail_part->filename)
- $mail_part->filename = 'Part '.$mail_part->mime_id;
-
- $this->attachments[] = $mail_part;
- }
- // attachment with invalid content type
- // replace malformed content type with application/octet-stream (#1487767)
- else if ($mail_part->filename) {
- $mail_part->ctype_primary = 'application';
- $mail_part->ctype_secondary = 'octet-stream';
- $mail_part->mimetype = 'application/octet-stream';
-
- $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)) {
- $this->storage->set_folder($this->folder);
- $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)) {
- $this->storage->set_folder($this->folder);
- $part->body = $this->storage->get_message_part($this->uid, $part->mime_id, $part);
- }
-
- $parts = array();
- // FIXME: line length is max.65?
- $uu_regexp = '/begin [0-7]{3,4} ([^\n]+)\n/s';
-
- if (preg_match_all($uu_regexp, $part->body, $matches, PREG_SET_ORDER)) {
- // update message content-type
- $part->ctype_primary = 'multipart';
- $part->ctype_secondary = 'mixed';
- $part->mimetype = $part->ctype_primary . '/' . $part->ctype_secondary;
- $uu_endstring = "`\nend\n";
-
- // add attachments to the structure
- foreach ($matches as $pid => $att) {
- $startpos = strpos($part->body, $att[1]) + strlen($att[1]) + 1; // "\n"
- $endpos = strpos($part->body, $uu_endstring);
- $filebody = substr($part->body, $startpos, $endpos-$startpos);
-
- // remove attachments bodies from the message body
- $part->body = substr_replace($part->body, "", $startpos, $endpos+strlen($uu_endstring)-$startpos);
-
- $uupart = new rcube_message_part;
-
- $uupart->filename = trim($att[1]);
- $uupart->encoding = 'stream';
- $uupart->body = convert_uudecode($filebody);
- $uupart->size = strlen($uupart->body);
- $uupart->mime_id = 'uu.' . $part->mime_id . '.' . $pid;
-
- $ctype = rcube_mime::content_type($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]);
- }
-
- // remove attachments bodies from the message body
- $part->body = preg_replace($uu_regexp, '', $part->body);
- }
-
- return $parts;
- }
-
-
- /**
- * Deprecated methods (to be removed)
- */
-
- public static function unfold_flowed($text)
- {
- return rcube_mime::unfold_flowed($text);
- }
-
- public static function format_flowed($text, $length = 72)
- {
- return rcube_mime::format_flowed($text, $length);
- }
-
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 03:50:09 +0000