/
rcube_imap.php
3170 lines (2650 loc) · 88.7 KB
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rcube_imap.php
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<?php
/*
+-----------------------------------------------------------------------+
| program/include/rcube_imap.php |
| |
| This file is part of the RoundCube Webmail client |
| Copyright (C) 2005-2009, RoundCube Dev. - Switzerland |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| IMAP wrapper that implements the Iloha IMAP Library (IIL) |
| See http://ilohamail.org/ for details |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id$
*/
/*
* Obtain classes from the Iloha IMAP library
*/
require_once('lib/imap.inc');
require_once('lib/mime.inc');
require_once('lib/tnef_decoder.inc');
/**
* Interface class for accessing an IMAP server
*
* This is a wrapper that implements the Iloha IMAP Library (IIL)
*
* @package Mail
* @author Thomas Bruederli <roundcube@gmail.com>
* @version 1.40
* @link http://ilohamail.org
*/
class rcube_imap
{
var $db;
var $conn;
var $root_ns = '';
var $root_dir = '';
var $mailbox = 'INBOX';
var $list_page = 1;
var $page_size = 10;
var $sort_field = 'date';
var $sort_order = 'DESC';
var $delimiter = NULL;
var $caching_enabled = FALSE;
var $default_charset = 'ISO-8859-1';
var $struct_charset = NULL;
var $default_folders = array('INBOX');
var $default_folders_lc = array('inbox');
var $fetch_add_headers = '';
var $cache = array();
var $cache_keys = array();
var $cache_changes = array();
var $uid_id_map = array();
var $msg_headers = array();
var $skip_deleted = FALSE;
var $search_set = NULL;
var $search_string = '';
var $search_charset = '';
var $search_sort_field = '';
var $debug_level = 1;
var $error_code = 0;
var $options = array('imap' => 'check');
/**
* Object constructor
*
* @param object DB Database connection
*/
function __construct($db_conn)
{
$this->db = $db_conn;
}
/**
* Connect to an IMAP server
*
* @param string Host to connect
* @param string Username for IMAP account
* @param string Password for IMAP account
* @param number Port to connect to
* @param string SSL schema (either ssl or tls) or null if plain connection
* @return boolean TRUE on success, FALSE on failure
* @access public
*/
function connect($host, $user, $pass, $port=143, $use_ssl=null)
{
global $ICL_SSL, $ICL_PORT, $IMAP_USE_INTERNAL_DATE;
// check for Open-SSL support in PHP build
if ($use_ssl && extension_loaded('openssl'))
$ICL_SSL = $use_ssl == 'imaps' ? 'ssl' : $use_ssl;
else if ($use_ssl)
{
raise_error(array('code' => 403, 'type' => 'imap', 'file' => __FILE__,
'message' => 'Open SSL not available;'), TRUE, FALSE);
$port = 143;
}
$ICL_PORT = $port;
$IMAP_USE_INTERNAL_DATE = false;
$this->conn = iil_Connect($host, $user, $pass, $this->options);
$this->host = $host;
$this->user = $user;
$this->pass = $pass;
$this->port = $port;
$this->ssl = $use_ssl;
// print trace mesages
if ($this->conn && ($this->debug_level & 8))
console($this->conn->message);
// write error log
else if (!$this->conn && $GLOBALS['iil_error'])
{
$this->error_code = $GLOBALS['iil_errornum'];
raise_error(array('code' => 403,
'type' => 'imap',
'message' => $GLOBALS['iil_error']), TRUE, FALSE);
}
// get server properties
if ($this->conn)
{
if (!empty($this->conn->delimiter))
$this->delimiter = $this->conn->delimiter;
if (!empty($this->conn->rootdir))
{
$this->set_rootdir($this->conn->rootdir);
$this->root_ns = ereg_replace('[\.\/]$', '', $this->conn->rootdir);
}
}
return $this->conn ? TRUE : FALSE;
}
/**
* Close IMAP connection
* Usually done on script shutdown
*
* @access public
*/
function close()
{
if ($this->conn)
iil_Close($this->conn);
}
/**
* Close IMAP connection and re-connect
* This is used to avoid some strange socket errors when talking to Courier IMAP
*
* @access public
*/
function reconnect()
{
$this->close();
$this->connect($this->host, $this->user, $this->pass, $this->port, $this->ssl);
// issue SELECT command to restore connection status
if ($this->mailbox)
iil_C_Select($this->conn, $this->mailbox);
}
/**
* Set options to be used in iil_Connect()
*/
function set_options($opt)
{
$this->options = array_merge($this->options, (array)$opt);
}
/**
* Set a root folder for the IMAP connection.
*
* Only folders within this root folder will be displayed
* and all folder paths will be translated using this folder name
*
* @param string Root folder
* @access public
*/
function set_rootdir($root)
{
if (ereg('[\.\/]$', $root)) //(substr($root, -1, 1)==='/')
$root = substr($root, 0, -1);
$this->root_dir = $root;
$this->options['rootdir'] = $root;
if (empty($this->delimiter))
$this->get_hierarchy_delimiter();
}
/**
* Set default message charset
*
* This will be used for message decoding if a charset specification is not available
*
* @param string Charset string
* @access public
*/
function set_charset($cs)
{
$this->default_charset = $cs;
}
/**
* This list of folders will be listed above all other folders
*
* @param array Indexed list of folder names
* @access public
*/
function set_default_mailboxes($arr)
{
if (is_array($arr))
{
$this->default_folders = $arr;
$this->default_folders_lc = array();
// add inbox if not included
if (!in_array_nocase('INBOX', $this->default_folders))
array_unshift($this->default_folders, 'INBOX');
// create a second list with lower cased names
foreach ($this->default_folders as $mbox)
$this->default_folders_lc[] = strtolower($mbox);
}
}
/**
* Set internal mailbox reference.
*
* All operations will be perfomed on this mailbox/folder
*
* @param string Mailbox/Folder name
* @access public
*/
function set_mailbox($new_mbox)
{
$mailbox = $this->_mod_mailbox($new_mbox);
if ($this->mailbox == $mailbox)
return;
$this->mailbox = $mailbox;
// clear messagecount cache for this mailbox
$this->_clear_messagecount($mailbox);
}
/**
* Set internal list page
*
* @param number Page number to list
* @access public
*/
function set_page($page)
{
$this->list_page = (int)$page;
}
/**
* Set internal page size
*
* @param number Number of messages to display on one page
* @access public
*/
function set_pagesize($size)
{
$this->page_size = (int)$size;
}
/**
* Save a set of message ids for future message listing methods
*
* @param string IMAP Search query
* @param array List of message ids or NULL if empty
* @param string Charset of search string
* @param string Sorting field
*/
function set_search_set($str=null, $msgs=null, $charset=null, $sort_field=null)
{
if (is_array($str) && $msgs == null)
list($str, $msgs, $charset, $sort_field) = $str;
if ($msgs != null && !is_array($msgs))
$msgs = split(',', $msgs);
$this->search_string = $str;
$this->search_set = $msgs;
$this->search_charset = $charset;
$this->search_sort_field = $sort_field;
}
/**
* Return the saved search set as hash array
* @return array Search set
*/
function get_search_set()
{
return array($this->search_string, $this->search_set, $this->search_charset, $this->search_sort_field);
}
/**
* Returns the currently used mailbox name
*
* @return string Name of the mailbox/folder
* @access public
*/
function get_mailbox_name()
{
return $this->conn ? $this->_mod_mailbox($this->mailbox, 'out') : '';
}
/**
* Returns the IMAP server's capability
*
* @param string Capability name
* @return mixed Capability value or TRUE if supported, FALSE if not
* @access public
*/
function get_capability($cap)
{
return iil_C_GetCapability($this->conn, strtoupper($cap));
}
/**
* Checks the PERMANENTFLAGS capability of the current mailbox
* and returns true if the given flag is supported by the IMAP server
*
* @param string Permanentflag name
* @return mixed True if this flag is supported
* @access public
*/
function check_permflag($flag)
{
$flag = strtoupper($flag);
$imap_flag = $GLOBALS['IMAP_FLAGS'][$flag];
return (in_array_nocase($imap_flag, $this->conn->permanentflags));
}
/**
* Returns the delimiter that is used by the IMAP server for folder separation
*
* @return string Delimiter string
* @access public
*/
function get_hierarchy_delimiter()
{
if ($this->conn && empty($this->delimiter))
$this->delimiter = iil_C_GetHierarchyDelimiter($this->conn);
if (empty($this->delimiter))
$this->delimiter = '/';
return $this->delimiter;
}
/**
* Public method for mailbox listing.
*
* Converts mailbox name with root dir first
*
* @param string Optional root folder
* @param string Optional filter for mailbox listing
* @return array List of mailboxes/folders
* @access public
*/
function list_mailboxes($root='', $filter='*')
{
$a_out = array();
$a_mboxes = $this->_list_mailboxes($root, $filter);
foreach ($a_mboxes as $mbox_row)
{
$name = $this->_mod_mailbox($mbox_row, 'out');
if (strlen($name))
$a_out[] = $name;
}
// INBOX should always be available
if (!in_array_nocase('INBOX', $a_out))
array_unshift($a_out, 'INBOX');
// sort mailboxes
$a_out = $this->_sort_mailbox_list($a_out);
return $a_out;
}
/**
* Private method for mailbox listing
*
* @return array List of mailboxes/folders
* @see rcube_imap::list_mailboxes()
* @access private
*/
function _list_mailboxes($root='', $filter='*')
{
$a_defaults = $a_out = array();
// get cached folder list
$a_mboxes = $this->get_cache('mailboxes');
if (is_array($a_mboxes))
return $a_mboxes;
// Give plugins a chance to provide a list of mailboxes
$data = rcmail::get_instance()->plugins->exec_hook('list_mailboxes',array('root'=>$root,'filter'=>$filter));
if (isset($data['folders'])) {
$a_folders = $data['folders'];
}
else{
// retrieve list of folders from IMAP server
$a_folders = iil_C_ListSubscribed($this->conn, $this->_mod_mailbox($root), $filter);
}
if (!is_array($a_folders) || !sizeof($a_folders))
$a_folders = array();
// write mailboxlist to cache
$this->update_cache('mailboxes', $a_folders);
return $a_folders;
}
/**
* Get message count for a specific mailbox
*
* @param string Mailbox/folder name
* @param string Mode for count [ALL|UNSEEN|RECENT]
* @param boolean Force reading from server and update cache
* @return int Number of messages
* @access public
*/
function messagecount($mbox_name='', $mode='ALL', $force=FALSE)
{
$mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
return $this->_messagecount($mailbox, $mode, $force);
}
/**
* Private method for getting nr of messages
*
* @access private
* @see rcube_imap::messagecount()
*/
function _messagecount($mailbox='', $mode='ALL', $force=FALSE)
{
$a_mailbox_cache = FALSE;
$mode = strtoupper($mode);
if (empty($mailbox))
$mailbox = $this->mailbox;
// count search set
if ($this->search_string && $mailbox == $this->mailbox && $mode == 'ALL' && !$force)
return count((array)$this->search_set);
$a_mailbox_cache = $this->get_cache('messagecount');
// return cached value
if (!$force && is_array($a_mailbox_cache[$mailbox]) && isset($a_mailbox_cache[$mailbox][$mode]))
return $a_mailbox_cache[$mailbox][$mode];
// RECENT count is fetched a bit different
if ($mode == 'RECENT')
$count = iil_C_CheckForRecent($this->conn, $mailbox);
// use SEARCH for message counting
else if ($this->skip_deleted)
{
$search_str = "ALL UNDELETED";
// get message count and store in cache
if ($mode == 'UNSEEN')
$search_str .= " UNSEEN";
// get message count using SEARCH
// not very performant but more precise (using UNDELETED)
$count = 0;
$index = $this->_search_index($mailbox, $search_str);
if (is_array($index))
{
$str = implode(",", $index);
if (!empty($str))
$count = count($index);
}
}
else
{
if ($mode == 'UNSEEN')
$count = iil_C_CountUnseen($this->conn, $mailbox);
else
$count = iil_C_CountMessages($this->conn, $mailbox);
}
if (!is_array($a_mailbox_cache[$mailbox]))
$a_mailbox_cache[$mailbox] = array();
$a_mailbox_cache[$mailbox][$mode] = (int)$count;
// write back to cache
$this->update_cache('messagecount', $a_mailbox_cache);
return (int)$count;
}
/**
* Public method for listing headers
* convert mailbox name with root dir first
*
* @param string Mailbox/folder name
* @param int Current page to list
* @param string Header field to sort by
* @param string Sort order [ASC|DESC]
* @return array Indexed array with message header objects
* @access public
*/
function list_headers($mbox_name='', $page=NULL, $sort_field=NULL, $sort_order=NULL)
{
$mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
return $this->_list_headers($mailbox, $page, $sort_field, $sort_order);
}
/**
* Private method for listing message headers
*
* @access private
* @see rcube_imap::list_headers
*/
function _list_headers($mailbox='', $page=NULL, $sort_field=NULL, $sort_order=NULL, $recursive=FALSE)
{
if (!strlen($mailbox))
return array();
// use saved message set
if ($this->search_string && $mailbox == $this->mailbox)
return $this->_list_header_set($mailbox, $page, $sort_field, $sort_order);
$this->_set_sort_order($sort_field, $sort_order);
$max = $this->_messagecount($mailbox);
$start_msg = ($this->list_page-1) * $this->page_size;
list($begin, $end) = $this->_get_message_range($max, $page);
// mailbox is empty
if ($begin >= $end)
return array();
$headers_sorted = FALSE;
$cache_key = $mailbox.'.msg';
$cache_status = $this->check_cache_status($mailbox, $cache_key);
// cache is OK, we can get all messages from local cache
if ($cache_status>0)
{
$a_msg_headers = $this->get_message_cache($cache_key, $start_msg, $start_msg+$this->page_size, $this->sort_field, $this->sort_order);
$headers_sorted = TRUE;
}
// cache is dirty, sync it
else if ($this->caching_enabled && $cache_status==-1 && !$recursive)
{
$this->sync_header_index($mailbox);
return $this->_list_headers($mailbox, $page, $this->sort_field, $this->sort_order, TRUE);
}
else
{
// retrieve headers from IMAP
if ($this->get_capability('sort') && ($msg_index = iil_C_Sort($this->conn, $mailbox, $this->sort_field, $this->skip_deleted ? 'UNDELETED' : '')))
{
$mymsgidx = array_slice ($msg_index, $begin, $end-$begin);
$msgs = join(",", $mymsgidx);
}
else
{
$msgs = sprintf("%d:%d", $begin+1, $end);
$msg_index = range($begin, $end);
}
// fetch reuested headers from server
$a_msg_headers = array();
$deleted_count = $this->_fetch_headers($mailbox, $msgs, $a_msg_headers, $cache_key);
// delete cached messages with a higher index than $max+1
// Changed $max to $max+1 to fix this bug : #1484295
$this->clear_message_cache($cache_key, $max + 1);
// kick child process to sync cache
// ...
}
// return empty array if no messages found
if (!is_array($a_msg_headers) || empty($a_msg_headers)) {
return array();
}
// if not already sorted
if (!$headers_sorted)
{
// use this class for message sorting
$sorter = new rcube_header_sorter();
$sorter->set_sequence_numbers($msg_index);
$sorter->sort_headers($a_msg_headers);
if ($this->sort_order == 'DESC')
$a_msg_headers = array_reverse($a_msg_headers);
}
return array_values($a_msg_headers);
}
/**
* Private method for listing a set of message headers (search results)
*
* @param string Mailbox/folder name
* @param int Current page to list
* @param string Header field to sort by
* @param string Sort order [ASC|DESC]
* @return array Indexed array with message header objects
* @access private
* @see rcube_imap::list_header_set()
*/
function _list_header_set($mailbox, $page=NULL, $sort_field=NULL, $sort_order=NULL)
{
if (!strlen($mailbox) || empty($this->search_set))
return array();
$msgs = $this->search_set;
$a_msg_headers = array();
$start_msg = ($this->list_page-1) * $this->page_size;
$this->_set_sort_order($sort_field, $sort_order);
// sorted messages, so we can first slice array and then fetch only wanted headers
if ($this->get_capability('sort')) // SORT searching result
{
// reset search set if sorting field has been changed
if ($this->sort_field && $this->search_sort_field != $this->sort_field)
{
$msgs = $this->search('', $this->search_string, $this->search_charset, $this->sort_field);
}
// return empty array if no messages found
if (empty($msgs))
return array();
if ($sort_order == 'DESC')
$msgs = array_reverse($msgs);
// get messages uids for one page
$msgs = array_slice(array_values($msgs), $start_msg, min(count($msgs)-$start_msg, $this->page_size));
// fetch headers
$this->_fetch_headers($mailbox, join(',',$msgs), $a_msg_headers, NULL);
$sorter = new rcube_header_sorter();
$sorter->set_sequence_numbers($msgs);
$sorter->sort_headers($a_msg_headers);
return array_values($a_msg_headers);
}
else { // SEARCH searching result, need sorting
$cnt = count($msgs);
if ($cnt > 300 && $cnt > $this->page_size) { // experimantal value for best result
// use memory less expensive (and quick) method for big result set
$a_index = $this->message_index('', $this->sort_field, $this->sort_order);
// get messages uids for one page...
$msgs = array_slice($a_index, $start_msg, min($cnt-$start_msg, $this->page_size));
// ...and fetch headers
$this->_fetch_headers($mailbox, join(',', $msgs), $a_msg_headers, NULL);
// return empty array if no messages found
if (!is_array($a_msg_headers) || empty($a_msg_headers))
return array();
$sorter = new rcube_header_sorter();
$sorter->set_sequence_numbers($msgs);
$sorter->sort_headers($a_msg_headers);
return array_values($a_msg_headers);
}
else {
// for small result set we can fetch all messages headers
$this->_fetch_headers($mailbox, join(',', $msgs), $a_msg_headers, NULL);
// return empty array if no messages found
if (!is_array($a_msg_headers) || empty($a_msg_headers))
return array();
// if not already sorted
$a_msg_headers = iil_SortHeaders($a_msg_headers, $this->sort_field, $this->sort_order);
// only return the requested part of the set
return array_slice(array_values($a_msg_headers), $start_msg, min($cnt-$start_msg, $this->page_size));
}
}
}
/**
* Helper function to get first and last index of the requested set
*
* @param int message count
* @param mixed page number to show, or string 'all'
* @return array array with two values: first index, last index
* @access private
*/
function _get_message_range($max, $page)
{
$start_msg = ($this->list_page-1) * $this->page_size;
if ($page=='all')
{
$begin = 0;
$end = $max;
}
else if ($this->sort_order=='DESC')
{
$begin = $max - $this->page_size - $start_msg;
$end = $max - $start_msg;
}
else
{
$begin = $start_msg;
$end = $start_msg + $this->page_size;
}
if ($begin < 0) $begin = 0;
if ($end < 0) $end = $max;
if ($end > $max) $end = $max;
return array($begin, $end);
}
/**
* Fetches message headers
* Used for loop
*
* @param string Mailbox name
* @param string Message index to fetch
* @param array Reference to message headers array
* @param array Array with cache index
* @return int Number of deleted messages
* @access private
*/
function _fetch_headers($mailbox, $msgs, &$a_msg_headers, $cache_key)
{
// cache is incomplete
$cache_index = $this->get_message_cache_index($cache_key);
// fetch reuested headers from server
$a_header_index = iil_C_FetchHeaders($this->conn, $mailbox, $msgs, false, $this->fetch_add_headers);
$deleted_count = 0;
if (!empty($a_header_index))
{
foreach ($a_header_index as $i => $headers)
{
if ($headers->deleted && $this->skip_deleted)
{
// delete from cache
if ($cache_index[$headers->id] && $cache_index[$headers->id] == $headers->uid)
$this->remove_message_cache($cache_key, $headers->id);
$deleted_count++;
continue;
}
// add message to cache
if ($this->caching_enabled && $cache_index[$headers->id] != $headers->uid)
$this->add_message_cache($cache_key, $headers->id, $headers);
$a_msg_headers[$headers->uid] = $headers;
}
}
return $deleted_count;
}
/**
* Return sorted array of message IDs (not UIDs)
*
* @param string Mailbox to get index from
* @param string Sort column
* @param string Sort order [ASC, DESC]
* @return array Indexed array with message ids
*/
function message_index($mbox_name='', $sort_field=NULL, $sort_order=NULL)
{
$this->_set_sort_order($sort_field, $sort_order);
$mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
$key = "{$mailbox}:{$this->sort_field}:{$this->sort_order}:{$this->search_string}.msgi";
// we have a saved search result. get index from there
if (!isset($this->cache[$key]) && $this->search_string && $mailbox == $this->mailbox)
{
$this->cache[$key] = array();
if ($this->get_capability('sort'))
{
if ($this->sort_field && $this->search_sort_field != $this->sort_field)
$this->search('', $this->search_string, $this->search_charset, $this->sort_field);
if ($this->sort_order == 'DESC')
$this->cache[$key] = array_reverse($this->search_set);
else
$this->cache[$key] = $this->search_set;
}
else
{
$a_index = iil_C_FetchHeaderIndex($this->conn, $mailbox, join(',', $this->search_set), $this->sort_field, false);
if ($this->sort_order=="ASC")
asort($a_index);
else if ($this->sort_order=="DESC")
arsort($a_index);
$this->cache[$key] = array_keys($a_index);
}
}
// have stored it in RAM
if (isset($this->cache[$key]))
return $this->cache[$key];
// check local cache
$cache_key = $mailbox.'.msg';
$cache_status = $this->check_cache_status($mailbox, $cache_key);
// cache is OK
if ($cache_status>0)
{
$a_index = $this->get_message_cache_index($cache_key, TRUE, $this->sort_field, $this->sort_order);
return array_keys($a_index);
}
// fetch complete message index
$msg_count = $this->_messagecount($mailbox);
if ($this->get_capability('sort') && ($a_index = iil_C_Sort($this->conn, $mailbox, $this->sort_field, '')))
{
if ($this->sort_order == 'DESC')
$a_index = array_reverse($a_index);
$this->cache[$key] = $a_index;
}
else
{
$a_index = iil_C_FetchHeaderIndex($this->conn, $mailbox, "1:$msg_count", $this->sort_field);
if ($this->sort_order=="ASC")
asort($a_index);
else if ($this->sort_order=="DESC")
arsort($a_index);
$this->cache[$key] = array_keys($a_index);
}
return $this->cache[$key];
}
/**
* @access private
*/
function sync_header_index($mailbox)
{
$cache_key = $mailbox.'.msg';
$cache_index = $this->get_message_cache_index($cache_key);
$msg_count = $this->_messagecount($mailbox);
// fetch complete message index
$a_message_index = iil_C_FetchHeaderIndex($this->conn, $mailbox, "1:$msg_count", 'UID');
foreach ($a_message_index as $id => $uid)
{
// message in cache at correct position
if ($cache_index[$id] == $uid)
{
unset($cache_index[$id]);
continue;
}
// message in cache but in wrong position
if (in_array((string)$uid, $cache_index, TRUE))
{
unset($cache_index[$id]);
}
// other message at this position
if (isset($cache_index[$id]))
{
$this->remove_message_cache($cache_key, $id);
unset($cache_index[$id]);
}
// fetch complete headers and add to cache
$headers = iil_C_FetchHeader($this->conn, $mailbox, $id, false, $this->fetch_add_headers);
$this->add_message_cache($cache_key, $headers->id, $headers);
}
// those ids that are still in cache_index have been deleted
if (!empty($cache_index))
{
foreach ($cache_index as $id => $uid)
$this->remove_message_cache($cache_key, $id);
}
}
/**
* Invoke search request to IMAP server
*
* @param string mailbox name to search in
* @param string search string
* @param string search string charset
* @param string header field to sort by
* @return array search results as list of message ids
* @access public
*/
function search($mbox_name='', $str=NULL, $charset=NULL, $sort_field=NULL)
{
if (!$str)
return false;
$mailbox = $mbox_name ? $this->_mod_mailbox($mbox_name) : $this->mailbox;
$results = $this->_search_index($mailbox, $str, $charset, $sort_field);
// try search with US-ASCII charset (should be supported by server)
// only if UTF-8 search is not supported
if (empty($results) && !is_array($results) && !empty($charset) && $charset!='US-ASCII')
{
// convert strings to US_ASCII
if(preg_match_all('/\{([0-9]+)\}\r\n/', $str, $matches, PREG_OFFSET_CAPTURE))
{
$last = 0; $res = '';
foreach($matches[1] as $m)
{
$string_offset = $m[1] + strlen($m[0]) + 4; // {}\r\n
$string = substr($str, $string_offset - 1, $m[0]);
$string = rcube_charset_convert($string, $charset, 'US-ASCII');
if (!$string) continue;
$res .= sprintf("%s{%d}\r\n%s", substr($str, $last, $m[1] - $last - 1), strlen($string), $string);
$last = $m[0] + $string_offset - 1;
}
if ($last < strlen($str))
$res .= substr($str, $last, strlen($str)-$last);
}
else // strings for conversion not found
$res = $str;
$results = $this->search($mbox_name, $res, 'US-ASCII', $sort_field);
}
$this->set_search_set($str, $results, $charset, $sort_field);
return $results;
}
/**