rcube_imap_generic.php
No OneTemporary
Actions

Authored By

Unknown

Size

59 KB

Referenced Files

None

Subscribers

None

rcube_imap_generic.php
View Options

	<?php

	/*
	+-----------------------------------------------------------------------+
	\| program/include/rcube_imap_generic.php \|
	\| \|
	\| This file is part of the RoundCube Webmail client \|
	\| Copyright (C) 2005-2010, RoundCube Dev. - Switzerland \|
	\| Licensed under the GNU GPL \|
	\| \|
	\| PURPOSE: \|
	\| Provide alternative IMAP library that doesn't rely on the standard \|
	\| C-Client based version. This allows to function regardless \|
	\| of whether or not the PHP build it's running on has IMAP \|
	\| functionality built-in. \|
	\| \|
	\| Based on Iloha IMAP Library. See http://ilohamail.org/ for details \|
	\| \|
	+-----------------------------------------------------------------------+
	\| Author: Aleksander Machniak <alec@alec.pl> \|
	\| Author: Ryo Chijiiwa <Ryo@IlohaMail.org> \|
	+-----------------------------------------------------------------------+

	$Id$

	*/


	/**
	* Struct representing an e-mail message header
	*
	* @package Mail
	* @author Aleksander Machniak <alec@alec.pl>
	*/
	class rcube_mail_header
	{
	public $id;
	public $uid;
	public $subject;
	public $from;
	public $to;
	public $cc;
	public $replyto;
	public $in_reply_to;
	public $date;
	public $messageID;
	public $size;
	public $encoding;
	public $charset;
	public $ctype;
	public $flags;
	public $timestamp;
	public $f;
	public $body_structure;
	public $internaldate;
	public $references;
	public $priority;
	public $mdn_to;
	public $mdn_sent = false;
	public $is_draft = false;
	public $seen = false;
	public $deleted = false;
	public $recent = false;
	public $answered = false;
	public $forwarded = false;
	public $junk = false;
	public $flagged = false;
	public $has_children = false;
	public $depth = 0;
	public $unread_children = 0;
	public $others = array();
	}

	// For backward compatibility with cached messages (#1486602)
	class iilBasicHeader extends rcube_mail_header
	{
	}

	/**
	* PHP based wrapper class to connect to an IMAP server
	*
	* @package Mail
	* @author Aleksander Machniak <alec@alec.pl>
	*/
	class rcube_imap_generic
	{
	public $error;
	public $errornum;
	public $message;
	public $rootdir;
	public $delimiter;
	public $permanentflags = array();
	public $flags = array(
	'SEEN' => '\\Seen',
	'DELETED' => '\\Deleted',
	'RECENT' => '\\Recent',
	'ANSWERED' => '\\Answered',
	'DRAFT' => '\\Draft',
	'FLAGGED' => '\\Flagged',
	'FORWARDED' => '$Forwarded',
	'MDNSENT' => '$MDNSent',
	'' => '\\',
	);

	private $exists;
	private $recent;
	private $selected;
	private $fp;
	private $host;
	private $logged = false;
	private $capability = array();
	private $capability_readed = false;
	private $prefs;

	/**
	* Object constructor
	*/
	function __construct()
	{
	}

	private function putLine($string, $endln=true)
	{
	if (!$this->fp)
	return false;

	if (!empty($this->prefs['debug_mode'])) {
	write_log('imap', 'C: '. rtrim($string));
	}

	return fputs($this->fp, $string . ($endln ? "\r\n" : ''));
	}

	// $this->putLine replacement with Command Continuation Requests (RFC3501 7.5) support
	private function putLineC($string, $endln=true)
	{
	if (!$this->fp)
	return NULL;

	if ($endln)
	$string .= "\r\n";

	$res = 0;
	if ($parts = preg_split('/(\{[0-9]+\}\r\n)/m', $string, -1, PREG_SPLIT_DELIM_CAPTURE)) {
	for ($i=0, $cnt=count($parts); $i<$cnt; $i++) {
	if (preg_match('/^\{[0-9]+\}\r\n$/', $parts[$i+1])) {
	$bytes = $this->putLine($parts[$i].$parts[$i+1], false);
	if ($bytes === false)
	return false;
	$res += $bytes;
	$line = $this->readLine(1000);
	// handle error in command
	if ($line[0] != '+')
	return false;
	$i++;
	}
	else {
	$bytes = $this->putLine($parts[$i], false);
	if ($bytes === false)
	return false;
	$res += $bytes;
	}
	}
	}

	return $res;
	}

	private function readLine($size=1024)
	{
	$line = '';

	if (!$this->fp) {
	return NULL;
	}

	if (!$size) {
	$size = 1024;
	}

	do {
	if (feof($this->fp)) {
	return $line ? $line : NULL;
	}

	$buffer = fgets($this->fp, $size);

	if ($buffer === false) {
	@fclose($this->fp);
	$this->fp = null;
	break;
	}
	if (!empty($this->prefs['debug_mode'])) {
	write_log('imap', 'S: '. chop($buffer));
	}
	$line .= $buffer;
	} while ($buffer[strlen($buffer)-1] != "\n");

	return $line;
	}

	private function multLine($line, $escape=false)
	{
	$line = chop($line);
	if (preg_match('/\{[0-9]+\}$/', $line)) {
	$out = '';

	preg_match_all('/(.*)\{([0-9]+)\}$/', $line, $a);
	$bytes = $a[2][0];
	while (strlen($out) < $bytes) {
	$line = $this->readBytes($bytes);
	if ($line === NULL)
	break;
	$out .= $line;
	}

	$line = $a[1][0] . '"' . ($escape ? $this->Escape($out) : $out) . '"';
	}

	return $line;
	}

	private function readBytes($bytes)
	{
	$data = '';
	$len = 0;
	while ($len < $bytes && !feof($this->fp))
	{
	$d = fread($this->fp, $bytes-$len);
	if (!empty($this->prefs['debug_mode'])) {
	write_log('imap', 'S: '. $d);
	}
	$data .= $d;
	$data_len = strlen($data);
	if ($len == $data_len) {
	break; // nothing was read -> exit to avoid apache lockups
	}
	$len = $data_len;
	}

	return $data;
	}

	// don't use it in loops, until you exactly know what you're doing
	private function readReply(&$untagged=null)
	{
	do {
	$line = trim($this->readLine(1024));
	// store untagged response lines
	if ($line[0] == '*')
	$untagged[] = $line;
	} while ($line[0] == '*');

	if ($untagged)
	$untagged = join("\n", $untagged);

	return $line;
	}

	private function parseResult($string)
	{
	$a = explode(' ', trim($string));
	if (count($a) >= 2) {
	$res = strtoupper($a[1]);
	if ($res == 'OK') {
	return 0;
	} else if ($res == 'NO') {
	return -1;
	} else if ($res == 'BAD') {
	return -2;
	} else if ($res == 'BYE') {
	@fclose($this->fp);
	$this->fp = null;
	return -3;
	}
	}
	return -4;
	}

	// check if $string starts with $match (or * BYE/BAD)
	private function startsWith($string, $match, $error=false, $nonempty=false)
	{
	$len = strlen($match);
	if ($len == 0) {
	return false;
	}
	if (!$this->fp) {
	return true;
	}
	if (strncmp($string, $match, $len) == 0) {
	return true;
	}
	if ($error && preg_match('/^\* (BYE\|BAD) /i', $string, $m)) {
	if (strtoupper($m[1]) == 'BYE') {
	@fclose($this->fp);
	$this->fp = null;
	}
	return true;
	}
	if ($nonempty && !strlen($string)) {
	return true;
	}
	return false;
	}

	private function startsWithI($string, $match, $error=false, $nonempty=false)
	{
	$len = strlen($match);
	if ($len == 0) {
	return false;
	}
	if (!$this->fp) {
	return true;
	}
	if (strncasecmp($string, $match, $len) == 0) {
	return true;
	}
	if ($error && preg_match('/^\* (BYE\|BAD) /i', $string, $m)) {
	if (strtoupper($m[1]) == 'BYE') {
	@fclose($this->fp);
	$this->fp = null;
	}
	return true;
	}
	if ($nonempty && !strlen($string)) {
	return true;
	}
	return false;
	}

	function getCapability($name)
	{
	if (in_array($name, $this->capability)) {
	return true;
	}
	else if ($this->capability_readed) {
	return false;
	}

	// get capabilities (only once) because initial
	// optional CAPABILITY response may differ
	$this->capability = array();

	if (!$this->putLine("cp01 CAPABILITY")) {
	return false;
	}
	do {
	$line = trim($this->readLine(1024));
	$a = explode(' ', $line);
	if ($line[0] == '*') {
	while (list($k, $w) = each($a)) {
	if ($w != '*' && $w != 'CAPABILITY')
	$this->capability[] = strtoupper($w);
	}
	}
	} while ($a[0] != 'cp01');

	$this->capability_readed = true;

	if (in_array($name, $this->capability)) {
	return true;
	}

	return false;
	}

	function clearCapability()
	{
	$this->capability = array();
	$this->capability_readed = false;
	}

	function authenticate($user, $pass, $encChallenge)
	{
	$ipad = '';
	$opad = '';

	// initialize ipad, opad
	for ($i=0; $i<64; $i++) {
	$ipad .= chr(0x36);
	$opad .= chr(0x5C);
	}

	// pad $pass so it's 64 bytes
	$padLen = 64 - strlen($pass);
	for ($i=0; $i<$padLen; $i++) {
	$pass .= chr(0);
	}

	// generate hash
	$hash = md5($this->_xor($pass,$opad) . pack("H*", md5($this->_xor($pass, $ipad) . base64_decode($encChallenge))));

	// generate reply
	$reply = base64_encode($user . ' ' . $hash);

	// send result, get reply
	$this->putLine($reply);
	$line = $this->readLine(1024);

	// process result
	$result = $this->parseResult($line);
	if ($result == 0) {
	$this->errornum = 0;
	return $this->fp;
	}

	$this->error = "Authentication for $user failed (AUTH): $line";
	$this->errornum = $result;

	return $result;
	}

	function login($user, $password)
	{
	$this->putLine('a001 LOGIN "'.$this->escape($user).'" "'.$this->escape($password).'"');

	$line = $this->readReply($untagged);

	// re-set capabilities list if untagged CAPABILITY response provided
	if (preg_match('/\* CAPABILITY (.+)/i', $untagged, $matches)) {
	$this->capability = explode(' ', strtoupper($matches[1]));
	}

	// process result
	$result = $this->parseResult($line);

	if ($result == 0) {
	$this->errornum = 0;
	return $this->fp;
	}

	@fclose($this->fp);
	$this->fp = false;

	$this->error = "Authentication for $user failed (LOGIN): $line";
	$this->errornum = $result;

	return $result;
	}

	function getNamespace()
	{
	if (isset($this->prefs['rootdir']) && is_string($this->prefs['rootdir'])) {
	$this->rootdir = $this->prefs['rootdir'];
	return true;
	}

	if (!$this->getCapability('NAMESPACE')) {
	return false;
	}

	if (!$this->putLine("ns1 NAMESPACE")) {
	return false;
	}
	do {
	$line = $this->readLine(1024);
	if ($this->startsWith($line, '* NAMESPACE')) {
	$i = 0;
	$line = $this->unEscape($line);
	$data = $this->parseNamespace(substr($line,11), $i, 0, 0);
	}
	} while (!$this->startsWith($line, 'ns1', true, true));

	if (!is_array($data)) {
	return false;
	}

	$user_space_data = $data[0];
	if (!is_array($user_space_data)) {
	return false;
	}

	$first_userspace = $user_space_data[0];
	if (count($first_userspace)!=2) {
	return false;
	}

	$this->rootdir = $first_userspace[0];
	$this->delimiter = $first_userspace[1];
	$this->prefs['rootdir'] = substr($this->rootdir, 0, -1);
	$this->prefs['delimiter'] = $this->delimiter;

	return true;
	}


	/**
	* Gets the delimiter, for example:
	* INBOX.foo -> .
	* INBOX/foo -> /
	* INBOX\foo -> \
	*
	* @return mixed A delimiter (string), or false.
	* @see connect()
	*/
	function getHierarchyDelimiter()
	{
	if ($this->delimiter) {
	return $this->delimiter;
	}
	if (!empty($this->prefs['delimiter'])) {
	return ($this->delimiter = $this->prefs['delimiter']);
	}

	$delimiter = false;

	// try (LIST "" ""), should return delimiter (RFC2060 Sec 6.3.8)
	if (!$this->putLine('ghd LIST "" ""')) {
	return false;
	}

	do {
	$line = $this->readLine(500);
	if ($line[0] == '*') {
	$line = rtrim($line);
	$a = rcube_explode_quoted_string(' ', $this->unEscape($line));
	if ($a[0] == '*') {
	$delimiter = str_replace('"', '', $a[count($a)-2]);
	}
	}
	} while (!$this->startsWith($line, 'ghd', true, true));

	if (strlen($delimiter)>0) {
	return $delimiter;
	}

	// if that fails, try namespace extension
	// try to fetch namespace data
	if (!$this->putLine("ns1 NAMESPACE")) {
	return false;
	}

	do {
	$line = $this->readLine(1024);
	if ($this->startsWith($line, '* NAMESPACE')) {
	$i = 0;
	$line = $this->unEscape($line);
	$data = $this->parseNamespace(substr($line,11), $i, 0, 0);
	}
	} while (!$this->startsWith($line, 'ns1', true, true));

	if (!is_array($data)) {
	return false;
	}

	// extract user space data (opposed to global/shared space)
	$user_space_data = $data[0];
	if (!is_array($user_space_data)) {
	return false;
	}

	// get first element
	$first_userspace = $user_space_data[0];
	if (!is_array($first_userspace)) {
	return false;
	}

	// extract delimiter
	$delimiter = $first_userspace[1];

	return $delimiter;
	}

	function connect($host, $user, $password, $options=null)
	{
	// set options
	if (is_array($options)) {
	$this->prefs = $options;
	}
	// set auth method
	if (!empty($this->prefs['auth_method'])) {
	$auth_method = strtoupper($this->prefs['auth_method']);
	} else {
	$auth_method = 'CHECK';
	}

	$message = "INITIAL: $auth_method\n";

	$result = false;

	// initialize connection
	$this->error = '';
	$this->errornum = 0;
	$this->selected = '';
	$this->user = $user;
	$this->host = $host;
	$this->logged = false;

	// check input
	if (empty($host)) {
	$this->error = "Empty host";
	$this->errornum = -2;
	return false;
	}
	if (empty($user)) {
	$this->error = "Empty user";
	$this->errornum = -1;
	return false;
	}
	if (empty($password)) {
	$this->error = "Empty password";
	$this->errornum = -1;
	return false;
	}

	if (!$this->prefs['port']) {
	$this->prefs['port'] = 143;
	}
	// check for SSL
	if ($this->prefs['ssl_mode'] && $this->prefs['ssl_mode'] != 'tls') {
	$host = $this->prefs['ssl_mode'] . '://' . $host;
	}

	// Connect
	if ($this->prefs['timeout'] > 0)
	$this->fp = @fsockopen($host, $this->prefs['port'], $errno, $errstr, $this->prefs['timeout']);
	else
	$this->fp = @fsockopen($host, $this->prefs['port'], $errno, $errstr);

	if (!$this->fp) {
	$this->error = sprintf("Could not connect to %s:%d: %s", $host, $this->prefs['port'], $errstr);
	$this->errornum = -2;
	return false;
	}

	if ($this->prefs['timeout'] > 0)
	stream_set_timeout($this->fp, $this->prefs['timeout']);

	$line = trim(fgets($this->fp, 8192));

	if ($this->prefs['debug_mode'] && $line) {
	write_log('imap', 'S: '. $line);
	}

	// Connected to wrong port or connection error?
	if (!preg_match('/^\* (OK\|PREAUTH)/i', $line)) {
	if ($line)
	$this->error = sprintf("Wrong startup greeting (%s:%d): %s", $host, $this->prefs['port'], $line);
	else
	$this->error = sprintf("Empty startup greeting (%s:%d)", $host, $this->prefs['port']);
	$this->errornum = -2;
	return false;
	}

	// RFC3501 [7.1] optional CAPABILITY response
	if (preg_match('/\[CAPABILITY ([^]]+)\]/i', $line, $matches)) {
	$this->capability = explode(' ', strtoupper($matches[1]));
	}

	$this->message .= $line;

	// TLS connection
	if ($this->prefs['ssl_mode'] == 'tls' && $this->getCapability('STARTTLS')) {
	if (version_compare(PHP_VERSION, '5.1.0', '>=')) {
	$this->putLine("tls0 STARTTLS");

	$line = $this->readLine(4096);
	if (!$this->startsWith($line, "tls0 OK")) {
	$this->error = "Server responded to STARTTLS with: $line";
	$this->errornum = -2;
	return false;
	}

	if (!stream_socket_enable_crypto($this->fp, true, STREAM_CRYPTO_METHOD_TLS_CLIENT)) {
	$this->error = "Unable to negotiate TLS";
	$this->errornum = -2;
	return false;
	}

	// Now we're authenticated, capabilities need to be reread
	$this->clearCapability();
	}
	}

	$orig_method = $auth_method;

	if ($auth_method == 'CHECK') {
	// check for supported auth methods
	if ($this->getCapability('AUTH=CRAM-MD5') \|\| $this->getCapability('AUTH=CRAM_MD5')) {
	$auth_method = 'AUTH';
	}
	else {
	// default to plain text auth
	$auth_method = 'PLAIN';
	}
	}

	if ($auth_method == 'AUTH') {
	// do CRAM-MD5 authentication
	$this->putLine("a000 AUTHENTICATE CRAM-MD5");
	$line = trim($this->readLine(1024));

	if ($line[0] == '+') {
	// got a challenge string, try CRAM-MD5
	$result = $this->authenticate($user, $password, substr($line,2));

	// stop if server sent BYE response
	if ($result == -3) {
	return false;
	}
	}

	if (!is_resource($result) && $orig_method == 'CHECK') {
	$auth_method = 'PLAIN';
	}
	}

	if ($auth_method == 'PLAIN') {
	// do plain text auth
	$result = $this->login($user, $password);
	}

	if (is_resource($result)) {
	if ($this->prefs['force_caps']) {
	$this->clearCapability();
	}
	$this->getNamespace();
	$this->logged = true;
	return true;
	} else {
	return false;
	}
	}

	function connected()
	{
	return ($this->fp && $this->logged) ? true : false;
	}

	function close()
	{
	if ($this->putLine("I LOGOUT")) {
	if (!feof($this->fp))
	fgets($this->fp, 1024);
	}
	@fclose($this->fp);
	$this->fp = false;
	}

	function select($mailbox)
	{
	if (empty($mailbox)) {
	return false;
	}
	if ($this->selected == $mailbox) {
	return true;
	}

	if ($this->putLine("sel1 SELECT \"".$this->escape($mailbox).'"')) {
	do {
	$line = chop($this->readLine(300));
	$a = explode(' ', $line);
	if (count($a) == 3) {
	$token = strtoupper($a[2]);
	if ($token == 'EXISTS') {
	$this->exists = (int) $a[1];
	}
	else if ($token == 'RECENT') {
	$this->recent = (int) $a[1];
	}
	}
	else if (preg_match('/\[?PERMANENTFLAGS\s+$([^$]+)\)\]/U', $line, $match)) {
	$this->permanentflags = explode(' ', $match[1]);
	}
	} while (!$this->startsWith($line, 'sel1', true, true));

	if (strcasecmp($a[1], 'OK') == 0) {
	$this->selected = $mailbox;
	return true;
	}
	else {
	$this->error = "Couldn't select $mailbox";
	}
	}

	return false;
	}

	function checkForRecent($mailbox)
	{
	if (empty($mailbox)) {
	$mailbox = 'INBOX';
	}

	$this->select($mailbox);
	if ($this->selected == $mailbox) {
	return $this->recent;
	}

	return false;
	}

	function countMessages($mailbox, $refresh = false)
	{
	if ($refresh) {
	$this->selected = '';
	}

	$this->select($mailbox);
	if ($this->selected == $mailbox) {
	return $this->exists;
	}

	return false;
	}

	function sort($mailbox, $field, $add='', $is_uid=FALSE, $encoding = 'US-ASCII')
	{
	$field = strtoupper($field);
	if ($field == 'INTERNALDATE') {
	$field = 'ARRIVAL';
	}

	$fields = array('ARRIVAL' => 1,'CC' => 1,'DATE' => 1,
	'FROM' => 1, 'SIZE' => 1, 'SUBJECT' => 1, 'TO' => 1);

	if (!$fields[$field]) {
	return false;
	}

	/* Do "SELECT" command */
	if (!$this->select($mailbox)) {
	return false;
	}

	$is_uid = $is_uid ? 'UID ' : '';

	// message IDs
	if (is_array($add))
	$add = $this->compressMessageSet(join(',', $add));

	$command = "s ".$is_uid."SORT ($field) $encoding ALL";
	$line = $data = '';

	if (!empty($add))
	$command .= ' '.$add;

	if (!$this->putLineC($command)) {
	return false;
	}
	do {
	$line = chop($this->readLine());
	if ($this->startsWith($line, '* SORT')) {
	$data .= substr($line, 7);
	} else if (preg_match('/^[0-9 ]+$/', $line)) {
	$data .= $line;
	}
	} while (!$this->startsWith($line, 's ', true, true));

	$result_code = $this->parseResult($line);

	if ($result_code != 0) {
	$this->error = "Sort: $line";
	return false;
	}

	return preg_split('/\s+/', $data, -1, PREG_SPLIT_NO_EMPTY);
	}

	function fetchHeaderIndex($mailbox, $message_set, $index_field='', $skip_deleted=true, $uidfetch=false)
	{
	if (is_array($message_set)) {
	if (!($message_set = $this->compressMessageSet(join(',', $message_set))))
	return false;
	} else {
	list($from_idx, $to_idx) = explode(':', $message_set);
	if (empty($message_set) \|\|
	(isset($to_idx) && $to_idx != '*' && (int)$from_idx > (int)$to_idx)) {
	return false;
	}
	}

	$index_field = empty($index_field) ? 'DATE' : strtoupper($index_field);

	$fields_a['DATE'] = 1;
	$fields_a['INTERNALDATE'] = 4;
	$fields_a['ARRIVAL'] = 4;
	$fields_a['FROM'] = 1;
	$fields_a['REPLY-TO'] = 1;
	$fields_a['SENDER'] = 1;
	$fields_a['TO'] = 1;
	$fields_a['CC'] = 1;
	$fields_a['SUBJECT'] = 1;
	$fields_a['UID'] = 2;
	$fields_a['SIZE'] = 2;
	$fields_a['SEEN'] = 3;
	$fields_a['RECENT'] = 3;
	$fields_a['DELETED'] = 3;

	if (!($mode = $fields_a[$index_field])) {
	return false;
	}

	/* Do "SELECT" command */
	if (!$this->select($mailbox)) {
	return false;
	}

	// build FETCH command string
	$key = 'fhi0';
	$cmd = $uidfetch ? 'UID FETCH' : 'FETCH';
	$deleted = $skip_deleted ? ' FLAGS' : '';

	if ($mode == 1 && $index_field == 'DATE')
	$request = " $cmd $message_set (INTERNALDATE BODY.PEEK[HEADER.FIELDS (DATE)]$deleted)";
	else if ($mode == 1)
	$request = " $cmd $message_set (BODY.PEEK[HEADER.FIELDS ($index_field)]$deleted)";
	else if ($mode == 2) {
	if ($index_field == 'SIZE')
	$request = " $cmd $message_set (RFC822.SIZE$deleted)";
	else
	$request = " $cmd $message_set ($index_field$deleted)";
	} else if ($mode == 3)
	$request = " $cmd $message_set (FLAGS)";
	else // 4
	$request = " $cmd $message_set (INTERNALDATE$deleted)";

	$request = $key . $request;

	if (!$this->putLine($request)) {
	return false;
	}

	$result = array();

	do {
	$line = chop($this->readLine(200));
	$line = $this->multLine($line);

	if (preg_match('/^\* ([0-9]+) FETCH/', $line, $m)) {
	$id = $m[1];
	$flags = NULL;

	if ($skip_deleted && preg_match('/FLAGS $([^)]+)$/', $line, $matches)) {
	$flags = explode(' ', strtoupper($matches[1]));
	if (in_array('\\DELETED', $flags)) {
	$deleted[$id] = $id;
	continue;
	}
	}

	if ($mode == 1 && $index_field == 'DATE') {
	if (preg_match('/BODY\[HEADER\.FIELDS $"DATE"$\] (.*)/', $line, $matches)) {
	$value = preg_replace(array('/^"*[a-z]+:/i'), '', $matches[1]);
	$value = trim($value);
	$result[$id] = $this->strToTime($value);
	}
	// non-existent/empty Date: header, use INTERNALDATE
	if (empty($result[$id])) {
	if (preg_match('/INTERNALDATE "([^"]+)"/', $line, $matches))
	$result[$id] = $this->strToTime($matches[1]);
	else
	$result[$id] = 0;
	}
	} else if ($mode == 1) {
	if (preg_match('/BODY\[HEADER\.FIELDS $"?(FROM\|REPLY-TO\|SENDER\|TO\|SUBJECT)"?$\] (.*)/', $line, $matches)) {
	$value = preg_replace(array('/^"*[a-z]+:/i', '/\s+$/sm'), array('', ''), $matches[2]);
	$result[$id] = trim($value);
	} else {
	$result[$id] = '';
	}
	} else if ($mode == 2) {
	if (preg_match('/\((UID\|RFC822\.SIZE) ([0-9]+)/', $line, $matches)) {
	$result[$id] = trim($matches[2]);
	} else {
	$result[$id] = 0;
	}
	} else if ($mode == 3) {
	if (!$flags && preg_match('/FLAGS $([^)]+)$/', $line, $matches)) {
	$flags = explode(' ', $matches[1]);
	}
	$result[$id] = in_array('\\'.$index_field, $flags) ? 1 : 0;
	} else if ($mode == 4) {
	if (preg_match('/INTERNALDATE "([^"]+)"/', $line, $matches)) {
	$result[$id] = $this->strToTime($matches[1]);
	} else {
	$result[$id] = 0;
	}
	}
	}
	} while (!$this->startsWith($line, $key, true, true));

	return $result;
	}

	private function compressMessageSet($message_set)
	{
	// given a comma delimited list of independent mid's,
	// compresses by grouping sequences together

	// if less than 255 bytes long, let's not bother
	if (strlen($message_set)<255) {
	return $message_set;
	}

	// see if it's already been compress
	if (strpos($message_set, ':') !== false) {
	return $message_set;
	}

	// separate, then sort
	$ids = explode(',', $message_set);
	sort($ids);

	$result = array();
	$start = $prev = $ids[0];

	foreach ($ids as $id) {
	$incr = $id - $prev;
	if ($incr > 1) { //found a gap
	if ($start == $prev) {
	$result[] = $prev; //push single id
	} else {
	$result[] = $start . ':' . $prev; //push sequence as start_id:end_id
	}
	$start = $id; //start of new sequence
	}
	$prev = $id;
	}

	// handle the last sequence/id
	if ($start==$prev) {
	$result[] = $prev;
	} else {
	$result[] = $start.':'.$prev;
	}

	// return as comma separated string
	return implode(',', $result);
	}

	function UID2ID($folder, $uid)
	{
	if ($uid > 0) {
	$id_a = $this->search($folder, "UID $uid");
	if (is_array($id_a) && count($id_a) == 1) {
	return $id_a[0];
	}
	}
	return false;
	}

	function ID2UID($folder, $id)
	{
	if (empty($id)) {
	return -1;
	}

	if (!$this->select($folder)) {
	return -1;
	}

	$result = -1;
	if ($this->putLine("fuid FETCH $id (UID)")) {
	do {
	$line = chop($this->readLine(1024));
	if (preg_match("/^\* $id FETCH $UID (.*)$/i", $line, $r)) {
	$result = $r[1];
	}
	} while (!$this->startsWith($line, 'fuid', true, true));
	}

	return $result;
	}

	function fetchUIDs($mailbox, $message_set=null)
	{
	if (is_array($message_set))
	$message_set = join(',', $message_set);
	else if (empty($message_set))
	$message_set = '1:*';

	return $this->fetchHeaderIndex($mailbox, $message_set, 'UID', false);
	}

	function fetchHeaders($mailbox, $message_set, $uidfetch=false, $bodystr=false, $add='')
	{
	$result = array();

	if (!$this->select($mailbox)) {
	return false;
	}

	if (is_array($message_set))
	$message_set = join(',', $message_set);

	$message_set = $this->compressMessageSet($message_set);

	if ($add)
	$add = ' '.strtoupper(trim($add));

	/* FETCH uid, size, flags and headers */
	$key = 'FH12';
	$request = $key . ($uidfetch ? ' UID' : '') . " FETCH $message_set ";
	$request .= "(UID RFC822.SIZE FLAGS INTERNALDATE ";
	if ($bodystr)
	$request .= "BODYSTRUCTURE ";
	$request .= "BODY.PEEK[HEADER.FIELDS ";
	$request .= "(DATE FROM TO SUBJECT REPLY-TO IN-REPLY-TO CC BCC ";
	$request .= "CONTENT-TRANSFER-ENCODING CONTENT-TYPE MESSAGE-ID ";
	$request .= "REFERENCES DISPOSITION-NOTIFICATION-TO X-PRIORITY ";
	$request .= "X-DRAFT-INFO".$add.")])";

	if (!$this->putLine($request)) {
	return false;
	}
	do {
	$line = $this->readLine(1024);
	$line = $this->multLine($line);

	if (!$line)
	break;

	$a = explode(' ', $line);

	if (($line[0] == '*') && ($a[2] == 'FETCH')) {
	$id = $a[1];

	$result[$id] = new rcube_mail_header;
	$result[$id]->id = $id;
	$result[$id]->subject = '';
	$result[$id]->messageID = 'mid:' . $id;

	$lines = array();
	$ln = 0;

	// Sample reply line:
	// * 321 FETCH (UID 2417 RFC822.SIZE 2730 FLAGS (\Seen)
	// INTERNALDATE "16-Nov-2008 21:08:46 +0100" BODYSTRUCTURE (...)
	// BODY[HEADER.FIELDS ...

	if (preg_match('/^\* [0-9]+ FETCH \((.*) BODY/s', $line, $matches)) {
	$str = $matches[1];

	// swap parents with quotes, then explode
	$str = preg_replace('/[()]/', '"', $str);
	$a = rcube_explode_quoted_string(' ', $str);

	// did we get the right number of replies?
	$parts_count = count($a);
	if ($parts_count>=6) {
	for ($i=0; $i<$parts_count; $i=$i+2) {
	if ($a[$i] == 'UID')
	$result[$id]->uid = $a[$i+1];
	else if ($a[$i] == 'RFC822.SIZE')
	$result[$id]->size = $a[$i+1];
	else if ($a[$i] == 'INTERNALDATE')
	$time_str = $a[$i+1];
	else if ($a[$i] == 'FLAGS')
	$flags_str = $a[$i+1];
	}

	$time_str = str_replace('"', '', $time_str);

	// if time is gmt...
	$time_str = str_replace('GMT','+0000',$time_str);

	$result[$id]->internaldate = $time_str;
	$result[$id]->timestamp = $this->StrToTime($time_str);
	$result[$id]->date = $time_str;
	}

	// BODYSTRUCTURE
	if($bodystr) {
	while (!preg_match('/ BODYSTRUCTURE (.*) BODY\[HEADER.FIELDS/s', $line, $m)) {
	$line2 = $this->readLine(1024);
	$line .= $this->multLine($line2, true);
	}
	$result[$id]->body_structure = $m[1];
	}

	// the rest of the result
	preg_match('/ BODY\[HEADER.FIELDS $.?$\]\s(.*)$/s', $line, $m);
	$reslines = explode("\n", trim($m[1], '"'));
	// re-parse (see below)
	foreach ($reslines as $resln) {
	if (ord($resln[0])<=32) {
	$lines[$ln] .= (empty($lines[$ln])?'':"\n").trim($resln);
	} else {
	$lines[++$ln] = trim($resln);
	}
	}
	}

	// Start parsing headers. The problem is, some header "lines" take up multiple lines.
	// So, we'll read ahead, and if the one we're reading now is a valid header, we'll
	// process the previous line. Otherwise, we'll keep adding the strings until we come
	// to the next valid header line.

	do {
	$line = chop($this->readLine(300), "\r\n");

	// The preg_match below works around communigate imap, which outputs " UID <number>)".
	// Without this, the while statement continues on and gets the "FH0 OK completed" message.
	// If this loop gets the ending message, then the outer loop does not receive it from radline on line 1249.
	// This in causes the if statement on line 1278 to never be true, which causes the headers to end up missing
	// If the if statement was changed to pick up the fh0 from this loop, then it causes the outer loop to spin
	// An alternative might be:
	// if (!preg_match("/:/",$line) && preg_match("/\)$/",$line)) break;
	// however, unsure how well this would work with all imap clients.
	if (preg_match("/^\s*UID [0-9]+\)$/", $line)) {
	break;
	}

	// handle FLAGS reply after headers (AOL, Zimbra?)
	if (preg_match('/\s+FLAGS $(.*)$\)$/', $line, $matches)) {
	$flags_str = $matches[1];
	break;
	}

	if (ord($line[0])<=32) {
	$lines[$ln] .= (empty($lines[$ln])?'':"\n").trim($line);
	} else {
	$lines[++$ln] = trim($line);
	}
	// patch from "Maksim Rubis" <siburny@hotmail.com>
	} while ($line[0] != ')' && !$this->startsWith($line, $key, true));

	if (strncmp($line, $key, strlen($key))) {
	// process header, fill rcube_mail_header obj.
	// initialize
	if (is_array($headers)) {
	reset($headers);
	while (list($k, $bar) = each($headers)) {
	$headers[$k] = '';
	}
	}

	// create array with header field:data
	while ( list($lines_key, $str) = each($lines) ) {
	list($field, $string) = $this->splitHeaderLine($str);

	$field = strtolower($field);
	$string = preg_replace('/\n\s*/', ' ', $string);

	switch ($field) {
	case 'date';
	$result[$id]->date = $string;
	$result[$id]->timestamp = $this->strToTime($string);
	break;
	case 'from':
	$result[$id]->from = $string;
	break;
	case 'to':
	$result[$id]->to = preg_replace('/undisclosed-recipients:[;,]*/', '', $string);
	break;
	case 'subject':
	$result[$id]->subject = $string;
	break;
	case 'reply-to':
	$result[$id]->replyto = $string;
	break;
	case 'cc':
	$result[$id]->cc = $string;
	break;
	case 'bcc':
	$result[$id]->bcc = $string;
	break;
	case 'content-transfer-encoding':
	$result[$id]->encoding = $string;
	break;
	case 'content-type':
	$ctype_parts = preg_split('/[; ]/', $string);
	$result[$id]->ctype = array_shift($ctype_parts);
	if (preg_match('/charset\s=\s"?([a-z0-9\-\.\_]+)"?/i', $string, $regs)) {
	$result[$id]->charset = $regs[1];
	}
	break;
	case 'in-reply-to':
	$result[$id]->in_reply_to = preg_replace('/[\n<>]/', '', $string);
	break;
	case 'references':
	$result[$id]->references = $string;
	break;
	case 'return-receipt-to':
	case 'disposition-notification-to':
	case 'x-confirm-reading-to':
	$result[$id]->mdn_to = $string;
	break;
	case 'message-id':
	$result[$id]->messageID = $string;
	break;
	case 'x-priority':
	if (preg_match('/^(\d+)/', $string, $matches))
	$result[$id]->priority = intval($matches[1]);
	break;
	default:
	if (strlen($field) > 2)
	$result[$id]->others[$field] = $string;
	break;
	} // end switch ()
	} // end while ()
	} else {
	$a = explode(' ', $line);
	}

	// process flags
	if (!empty($flags_str)) {
	$flags_str = preg_replace('/[\\\"]/', '', $flags_str);
	$flags_a = explode(' ', $flags_str);

	if (is_array($flags_a)) {
	// reset($flags_a);
	foreach($flags_a as $flag) {
	$flag = strtoupper($flag);
	if ($flag == 'SEEN') {
	$result[$id]->seen = true;
	} else if ($flag == 'DELETED') {
	$result[$id]->deleted = true;
	} else if ($flag == 'RECENT') {
	$result[$id]->recent = true;
	} else if ($flag == 'ANSWERED') {
	$result[$id]->answered = true;
	} else if ($flag == '$FORWARDED') {
	$result[$id]->forwarded = true;
	} else if ($flag == 'DRAFT') {
	$result[$id]->is_draft = true;
	} else if ($flag == '$MDNSENT') {
	$result[$id]->mdn_sent = true;
	} else if ($flag == 'FLAGGED') {
	$result[$id]->flagged = true;
	}
	}
	$result[$id]->flags = $flags_a;
	}
	}
	}
	} while (!$this->startsWith($line, $key, true));

	return $result;
	}

	function fetchHeader($mailbox, $id, $uidfetch=false, $bodystr=false, $add='')
	{
	$a = $this->fetchHeaders($mailbox, $id, $uidfetch, $bodystr, $add);
	if (is_array($a)) {
	return array_shift($a);
	}
	return false;
	}

	function sortHeaders($a, $field, $flag)
	{
	if (empty($field)) {
	$field = 'uid';
	}
	else {
	$field = strtolower($field);
	}

	if ($field == 'date' \|\| $field == 'internaldate') {
	$field = 'timestamp';
	}
	if (empty($flag)) {
	$flag = 'ASC';
	} else {
	$flag = strtoupper($flag);
	}

	$stripArr = ($field=='subject') ? array('Re: ','Fwd: ','Fw: ','"') : array('"');

	$c = count($a);
	if ($c > 0) {

	// Strategy:
	// First, we'll create an "index" array.
	// Then, we'll use sort() on that array,
	// and use that to sort the main array.

	// create "index" array
	$index = array();
	reset($a);
	while (list($key, $val) = each($a)) {
	if ($field == 'timestamp') {
	$data = $this->strToTime($val->date);
	if (!$data) {
	$data = $val->timestamp;
	}
	} else {
	$data = $val->$field;
	if (is_string($data)) {
	$data = strtoupper(str_replace($stripArr, '', $data));
	}
	}
	$index[$key]=$data;
	}

	// sort index
	$i = 0;
	if ($flag == 'ASC') {
	asort($index);
	} else {
	arsort($index);
	}

	// form new array based on index
	$result = array();
	reset($index);
	while (list($key, $val) = each($index)) {
	$result[$key]=$a[$key];
	$i++;
	}
	}

	return $result;
	}

	function expunge($mailbox, $messages=NULL)
	{
	if (!$this->select($mailbox)) {
	return -1;
	}

	$c = 0;
	$command = $messages ? "UID EXPUNGE $messages" : "EXPUNGE";

	if (!$this->putLine("exp1 $command")) {
	return -1;
	}

	do {
	$line = $this->readLine(100);
	if ($line[0] == '*') {
	$c++;
	}
	} while (!$this->startsWith($line, 'exp1', true, true));

	if ($this->parseResult($line) == 0) {
	$this->selected = ''; // state has changed, need to reselect
	return $c;
	}
	$this->error = $line;
	return -1;
	}

	function modFlag($mailbox, $messages, $flag, $mod)
	{
	if ($mod != '+' && $mod != '-') {
	return -1;
	}

	$flag = $this->flags[strtoupper($flag)];

	if (!$this->select($mailbox)) {
	return -1;
	}

	$c = 0;
	if (!$this->putLine("flg UID STORE $messages {$mod}FLAGS ($flag)")) {
	return false;
	}

	do {
	$line = $this->readLine(1000);
	if ($line[0] == '*') {
	$c++;
	}
	} while (!$this->startsWith($line, 'flg', true, true));

	if ($this->parseResult($line) == 0) {
	return $c;
	}

	$this->error = $line;
	return -1;
	}

	function flag($mailbox, $messages, $flag) {
	return $this->modFlag($mailbox, $messages, $flag, '+');
	}

	function unflag($mailbox, $messages, $flag) {
	return $this->modFlag($mailbox, $messages, $flag, '-');
	}

	function delete($mailbox, $messages) {
	return $this->modFlag($mailbox, $messages, 'DELETED', '+');
	}

	function copy($messages, $from, $to)
	{
	if (empty($from) \|\| empty($to)) {
	return -1;
	}

	if (!$this->select($from)) {
	return -1;
	}

	$this->putLine("cpy1 UID COPY $messages \"".$this->escape($to)."\"");
	$line = $this->readReply();
	return $this->parseResult($line);
	}

	function countUnseen($folder)
	{
	$index = $this->search($folder, 'ALL UNSEEN');
	if (is_array($index))
	return count($index);
	return false;
	}

	// Don't be tempted to change $str to pass by reference to speed this up - it will slow it down by about
	// 7 times instead :-) See comments on http://uk2.php.net/references and this article:
	// http://derickrethans.nl/files/phparch-php-variables-article.pdf
	private function parseThread($str, $begin, $end, $root, $parent, $depth, &$depthmap, &$haschildren)
	{
	$node = array();
	if ($str[$begin] != '(') {
	$stop = $begin + strspn($str, "1234567890", $begin, $end - $begin);
	$msg = substr($str, $begin, $stop - $begin);
	if ($msg == 0)
	return $node;
	if (is_null($root))
	$root = $msg;
	$depthmap[$msg] = $depth;
	$haschildren[$msg] = false;
	if (!is_null($parent))
	$haschildren[$parent] = true;
	if ($stop + 1 < $end)
	$node[$msg] = $this->parseThread($str, $stop + 1, $end, $root, $msg, $depth + 1, $depthmap, $haschildren);
	else
	$node[$msg] = array();
	} else {
	$off = $begin;
	while ($off < $end) {
	$start = $off;
	$off++;
	$n = 1;
	while ($n > 0) {
	$p = strpos($str, ')', $off);
	if ($p === false) {
	error_log('Mismatched brackets parsing IMAP THREAD response:');
	error_log(substr($str, ($begin < 10) ? 0 : ($begin - 10), $end - $begin + 20));
	error_log(str_repeat(' ', $off - (($begin < 10) ? 0 : ($begin - 10))));
	return $node;
	}
	$p1 = strpos($str, '(', $off);
	if ($p1 !== false && $p1 < $p) {
	$off = $p1 + 1;
	$n++;
	} else {
	$off = $p + 1;
	$n--;
	}
	}
	$node += $this->parseThread($str, $start + 1, $off - 1, $root, $parent, $depth, $depthmap, $haschildren);
	}
	}

	return $node;
	}

	function thread($folder, $algorithm='REFERENCES', $criteria='', $encoding='US-ASCII')
	{
	if (!$this->select($folder)) {
	return false;
	}

	$encoding = $encoding ? trim($encoding) : 'US-ASCII';
	$algorithm = $algorithm ? trim($algorithm) : 'REFERENCES';
	$criteria = $criteria ? 'ALL '.trim($criteria) : 'ALL';

	if (!$this->putLineC("thrd1 THREAD $algorithm $encoding $criteria")) {
	return false;
	}
	do {
	$line = trim($this->readLine(10000));
	if (preg_match('/^\* THREAD/', $line)) {
	$str = trim(substr($line, 8));
	$depthmap = array();
	$haschildren = array();
	$tree = $this->parseThread($str, 0, strlen($str), null, null, 0, $depthmap, $haschildren);
	}
	} while (!$this->startsWith($line, 'thrd1', true, true));

	$result_code = $this->parseResult($line);
	if ($result_code == 0) {
	return array($tree, $depthmap, $haschildren);
	}

	$this->error = "Thread: $line";
	return false;
	}

	function search($folder, $criteria, $return_uid=false)
	{
	if (!$this->select($folder)) {
	return false;
	}

	$data = '';
	$query = 'srch1 ' . ($return_uid ? 'UID ' : '') . 'SEARCH ' . chop($criteria);

	if (!$this->putLineC($query)) {
	return false;
	}

	do {
	$line = trim($this->readLine());
	if ($this->startsWith($line, '* SEARCH')) {
	$data .= substr($line, 8);
	} else if (preg_match('/^[0-9 ]+$/', $line)) {
	$data .= $line;
	}
	} while (!$this->startsWith($line, 'srch1', true, true));

	$result_code = $this->parseResult($line);
	if ($result_code == 0) {
	return preg_split('/\s+/', $data, -1, PREG_SPLIT_NO_EMPTY);
	}

	$this->error = "Search: $line";
	return false;
	}

	function move($messages, $from, $to)
	{
	if (!$from \|\| !$to) {
	return -1;
	}

	$r = $this->copy($messages, $from, $to);

	if ($r==0) {
	return $this->delete($from, $messages);
	}
	return $r;
	}

	function listMailboxes($ref, $mailbox)
	{
	return $this->_listMailboxes($ref, $mailbox, false);
	}

	function listSubscribed($ref, $mailbox)
	{
	return $this->_listMailboxes($ref, $mailbox, true);
	}

	private function _listMailboxes($ref, $mailbox, $subscribed=false)
	{
	if (empty($mailbox)) {
	$mailbox = '*';
	}

	if (empty($ref) && $this->rootdir) {
	$ref = $this->rootdir;
	}

	if ($subscribed) {
	$key = 'lsb';
	$command = 'LSUB';
	}
	else {
	$key = 'lmb';
	$command = 'LIST';
	}

	// send command
	if (!$this->putLine($key." ".$command." \"". $this->escape($ref) ."\" \"". $this->escape($mailbox) ."\"")) {
	$this->error = "Couldn't send $command command";
	return false;
	}

	// get folder list
	do {
	$line = $this->readLine(500);
	$line = $this->multLine($line, true);
	$a = explode(' ', $line);

	if (($line[0] == '*') && ($a[1] == $command)) {
	$line = rtrim($line);
	// split one line
	$a = rcube_explode_quoted_string(' ', $line);
	// last string is folder name
	$folders[] = preg_replace(array('/^"/', '/"$/'), '', $this->unEscape($a[count($a)-1]));
	// second from last is delimiter
	$delim = trim($a[count($a)-2], '"');
	}
	} while (!$this->startsWith($line, $key, true));

	if (is_array($folders)) {
	return $folders;
	} else if ($this->parseResult($line) == 0) {
	return array();
	}

	$this->error = $line;
	return false;
	}

	function fetchMIMEHeaders($mailbox, $id, $parts, $mime=true)
	{
	if (!$this->select($mailbox)) {
	return false;
	}

	$result = false;
	$parts = (array) $parts;
	$key = 'fmh0';
	$peeks = '';
	$idx = 0;
	$type = $mime ? 'MIME' : 'HEADER';

	// format request
	foreach($parts as $part)
	$peeks[] = "BODY.PEEK[$part.$type]";

	$request = "$key FETCH $id (" . implode(' ', $peeks) . ')';

	// send request
	if (!$this->putLine($request)) {
	return false;
	}

	do {
	$line = $this->readLine(1000);
	$line = $this->multLine($line);

	if (preg_match('/BODY\[([0-9\.]+)\.'.$type.'\]/', $line, $matches)) {
	$idx = $matches[1];
	$result[$idx] = preg_replace('/^(\* '.$id.' FETCH \()?\s*BODY\['.$idx.'\.'.$type.'\]\s+/', '', $line);
	$result[$idx] = trim($result[$idx], '"');
	$result[$idx] = rtrim($result[$idx], "\t\r\n\0\x0B");
	}
	} while (!$this->startsWith($line, $key, true));

	return $result;
	}

	function fetchPartHeader($mailbox, $id, $is_uid=false, $part=NULL)
	{
	$part = empty($part) ? 'HEADER' : $part.'.MIME';

	return $this->handlePartBody($mailbox, $id, $is_uid, $part);
	}

	function handlePartBody($mailbox, $id, $is_uid=false, $part='', $encoding=NULL, $print=NULL, $file=NULL)
	{
	if (!$this->select($mailbox)) {
	return false;
	}

	switch ($encoding) {
	case 'base64':
	$mode = 1;
	break;
	case 'quoted-printable':
	$mode = 2;
	break;
	case 'x-uuencode':
	case 'x-uue':
	case 'uue':
	case 'uuencode':
	$mode = 3;
	break;
	default:
	$mode = 0;
	}

	$reply_key = '* ' . $id;
	$result = false;

	// format request
	$key = 'ftch0';
	$request = $key . ($is_uid ? ' UID' : '') . " FETCH $id (BODY.PEEK[$part])";
	// send request
	if (!$this->putLine($request)) {
	return false;
	}

	// receive reply line
	do {
	$line = chop($this->readLine(1000));
	$a = explode(' ', $line);
	} while (!($end = $this->startsWith($line, $key, true)) && $a[2] != 'FETCH');

	$len = strlen($line);

	// handle empty "* X FETCH ()" response
	if ($line[$len-1] == ')' && $line[$len-2] != '(') {
	// one line response, get everything between first and last quotes
	if (substr($line, -4, 3) == 'NIL') {
	// NIL response
	$result = '';
	} else {
	$from = strpos($line, '"') + 1;
	$to = strrpos($line, '"');
	$len = $to - $from;
	$result = substr($line, $from, $len);
	}

	if ($mode == 1)
	$result = base64_decode($result);
	else if ($mode == 2)
	$result = quoted_printable_decode($result);
	else if ($mode == 3)
	$result = convert_uudecode($result);

	} else if ($line[$len-1] == '}') {
	// multi-line request, find sizes of content and receive that many bytes
	$from = strpos($line, '{') + 1;
	$to = strrpos($line, '}');
	$len = $to - $from;
	$sizeStr = substr($line, $from, $len);
	$bytes = (int)$sizeStr;
	$prev = '';

	while ($bytes > 0) {
	$line = $this->readLine(1024);
	$len = strlen($line);

	if ($len > $bytes) {
	$line = substr($line, 0, $bytes);
	$len = strlen($line);
	}
	$bytes -= $len;

	if ($mode == 1) {
	$line = rtrim($line, "\t\r\n\0\x0B");
	// create chunks with proper length for base64 decoding
	$line = $prev.$line;
	$length = strlen($line);
	if ($length % 4) {
	$length = floor($length / 4) * 4;
	$prev = substr($line, $length);
	$line = substr($line, 0, $length);
	}
	else
	$prev = '';

	if ($file)
	fwrite($file, base64_decode($line));
	else if ($print)
	echo base64_decode($line);
	else
	$result .= base64_decode($line);
	} else if ($mode == 2) {
	$line = rtrim($line, "\t\r\0\x0B");
	if ($file)
	fwrite($file, quoted_printable_decode($line));
	else if ($print)
	echo quoted_printable_decode($line);
	else
	$result .= quoted_printable_decode($line);
	} else if ($mode == 3) {
	$line = rtrim($line, "\t\r\n\0\x0B");
	if ($line == 'end' \|\| preg_match('/^begin\s+[0-7]+\s+.+$/', $line))
	continue;
	if ($file)
	fwrite($file, convert_uudecode($line));
	else if ($print)
	echo convert_uudecode($line);
	else
	$result .= convert_uudecode($line);
	} else {
	$line = rtrim($line, "\t\r\n\0\x0B");
	if ($file)
	fwrite($file, $line . "\n");
	else if ($print)
	echo $line . "\n";
	else
	$result .= $line . "\n";
	}
	}
	}

	// read in anything up until last line
	if (!$end)
	do {
	$line = $this->readLine(1024);
	} while (!$this->startsWith($line, $key, true));

	if ($result) {
	if ($file) {
	fwrite($file, $result);
	} else if ($print) {
	echo $result;
	} else
	return $result;
	return true;
	}

	return false;
	}

	function createFolder($folder)
	{
	if ($this->putLine('c CREATE "' . $this->escape($folder) . '"')) {
	do {
	$line = $this->readLine(300);
	} while (!$this->startsWith($line, 'c ', true, true));
	return ($this->parseResult($line) == 0);
	}
	return false;
	}

	function renameFolder($from, $to)
	{
	if ($this->putLine('r RENAME "' . $this->escape($from) . '" "' . $this->escape($to) . '"')) {
	do {
	$line = $this->readLine(300);
	} while (!$this->startsWith($line, 'r ', true, true));
	return ($this->parseResult($line) == 0);
	}
	return false;
	}

	function deleteFolder($folder)
	{
	if ($this->putLine('d DELETE "' . $this->escape($folder). '"')) {
	do {
	$line = $this->readLine(300);
	} while (!$this->startsWith($line, 'd ', true, true));
	return ($this->parseResult($line) == 0);
	}
	return false;
	}

	function clearFolder($folder)
	{
	$num_in_trash = $this->countMessages($folder);
	if ($num_in_trash > 0) {
	$this->delete($folder, '1:*');
	}
	return ($this->expunge($folder) >= 0);
	}

	function subscribe($folder)
	{
	$query = 'sub1 SUBSCRIBE "' . $this->escape($folder). '"';
	$this->putLine($query);

	$line = trim($this->readLine(512));
	return ($this->parseResult($line) == 0);
	}

	function unsubscribe($folder)
	{
	$query = 'usub1 UNSUBSCRIBE "' . $this->escape($folder) . '"';
	$this->putLine($query);

	$line = trim($this->readLine(512));
	return ($this->parseResult($line) == 0);
	}

	function append($folder, &$message)
	{
	if (!$folder) {
	return false;
	}

	$message = str_replace("\r", '', $message);
	$message = str_replace("\n", "\r\n", $message);

	$len = strlen($message);
	if (!$len) {
	return false;
	}

	$request = 'a APPEND "' . $this->escape($folder) .'" (\\Seen) {' . $len . '}';

	if ($this->putLine($request)) {
	$line = $this->readLine(512);

	if ($line[0] != '+') {
	// $errornum = $this->parseResult($line);
	$this->error = "Cannot write to folder: $line";
	return false;
	}

	if (!$this->putLine($message)) {
	return false;
	}

	do {
	$line = $this->readLine();
	} while (!$this->startsWith($line, 'a ', true, true));

	$result = ($this->parseResult($line) == 0);
	if (!$result) {
	$this->error = $line;
	}
	return $result;
	}

	$this->error = "Couldn't send command \"$request\"";
	return false;
	}

	function appendFromFile($folder, $path, $headers=null, $separator="\n\n")
	{
	if (!$folder) {
	return false;
	}

	// open message file
	$in_fp = false;
	if (file_exists(realpath($path))) {
	$in_fp = fopen($path, 'r');
	}
	if (!$in_fp) {
	$this->error = "Couldn't open $path for reading";
	return false;
	}

	$len = filesize($path);
	if (!$len) {
	return false;
	}

	if ($headers) {
	$headers = preg_replace('/[\r\n]+$/', '', $headers);
	$len += strlen($headers) + strlen($separator);
	}

	// send APPEND command
	$request = 'a APPEND "' . $this->escape($folder) . '" (\\Seen) {' . $len . '}';
	if ($this->putLine($request)) {
	$line = $this->readLine(512);

	if ($line[0] != '+') {
	//$errornum = $this->parseResult($line);
	$this->error = "Cannot write to folder: $line";
	return false;
	}

	// send headers with body separator
	if ($headers) {
	$this->putLine($headers . $separator, false);
	}

	// send file
	while (!feof($in_fp) && $this->fp) {
	$buffer = fgets($in_fp, 4096);
	$this->putLine($buffer, false);
	}
	fclose($in_fp);

	if (!$this->putLine('')) { // \r\n
	return false;
	}

	// read response
	do {
	$line = $this->readLine();
	} while (!$this->startsWith($line, 'a ', true, true));

	$result = ($this->parseResult($line) == 0);
	if (!$result) {
	$this->error = $line;
	}

	return $result;
	}

	$this->error = "Couldn't send command \"$request\"";
	return false;
	}

	function fetchStructureString($folder, $id, $is_uid=false)
	{
	if (!$this->select($folder)) {
	return false;
	}

	$key = 'F1247';
	$result = false;

	if ($this->putLine($key . ($is_uid ? ' UID' : '') ." FETCH $id (BODYSTRUCTURE)")) {
	do {
	$line = $this->readLine(5000);
	$line = $this->multLine($line, true);
	if (!preg_match("/^$key/", $line))
	$result .= $line;
	} while (!$this->startsWith($line, $key, true, true));

	$result = trim(substr($result, strpos($result, 'BODYSTRUCTURE')+13, -1));
	}

	return $result;
	}

	function getQuota()
	{
	/*
	* GETQUOTAROOT "INBOX"
	* QUOTAROOT INBOX user/rchijiiwa1
	* QUOTA user/rchijiiwa1 (STORAGE 654 9765)
	* OK Completed
	*/
	$result = false;
	$quota_lines = array();

	// get line(s) containing quota info
	if ($this->putLine('QUOT1 GETQUOTAROOT "INBOX"')) {
	do {
	$line = chop($this->readLine(5000));
	if ($this->startsWith($line, '* QUOTA ')) {
	$quota_lines[] = $line;
	}
	} while (!$this->startsWith($line, 'QUOT1', true, true));
	}

	// return false if not found, parse if found
	$min_free = PHP_INT_MAX;
	foreach ($quota_lines as $key => $quota_line) {
	$quota_line = preg_replace('/[()]/', '', $quota_line);
	$parts = explode(' ', $quota_line);
	$storage_part = array_search('STORAGE', $parts);

	if (!$storage_part)
	continue;

	$used = intval($parts[$storage_part+1]);
	$total = intval($parts[$storage_part+2]);
	$free = $total - $used;

	// return lowest available space from all quotas
	if ($free < $min_free) {
	$min_free = $free;
	$result['used'] = $used;
	$result['total'] = $total;
	$result['percent'] = min(100, round(($used/max(1,$total))*100));
	$result['free'] = 100 - $result['percent'];
	}
	}

	return $result;
	}

	private function _xor($string, $string2)
	{
	$result = '';
	$size = strlen($string);
	for ($i=0; $i<$size; $i++) {
	$result .= chr(ord($string[$i]) ^ ord($string2[$i]));
	}
	return $result;
	}

	private function strToTime($date)
	{
	// support non-standard "GMTXXXX" literal
	$date = preg_replace('/GMT\s*([+-][0-9]+)/', '\\1', $date);
	// if date parsing fails, we have a date in non-rfc format.
	// remove token from the end and try again
	while ((($ts = @strtotime($date))===false) \|\| ($ts < 0)) {
	$d = explode(' ', $date);
	array_pop($d);
	if (!$d) break;
	$date = implode(' ', $d);
	}

	$ts = (int) $ts;

	return $ts < 0 ? 0 : $ts;
	}

	private function SplitHeaderLine($string)
	{
	$pos = strpos($string, ':');
	if ($pos>0) {
	$res[0] = substr($string, 0, $pos);
	$res[1] = trim(substr($string, $pos+1));
	return $res;
	}
	return $string;
	}

	private function parseNamespace($str, &$i, $len=0, $l)
	{
	if (!$l) {
	$str = str_replace('NIL', '()', $str);
	}
	if (!$len) {
	$len = strlen($str);
	}
	$data = array();
	$in_quotes = false;
	$elem = 0;

	for ($i;$i<$len;$i++) {
	$c = (string)$str[$i];
	if ($c == '(' && !$in_quotes) {
	$i++;
	$data[$elem] = $this->parseNamespace($str, $i, $len, $l++);
	$elem++;
	} else if ($c == ')' && !$in_quotes) {
	return $data;
	} else if ($c == '\\') {
	$i++;
	if ($in_quotes) {
	$data[$elem] .= $c.$str[$i];
	}
	} else if ($c == '"') {
	$in_quotes = !$in_quotes;
	if (!$in_quotes) {
	$elem++;
	}
	} else if ($in_quotes) {
	$data[$elem].=$c;
	}
	}

	return $data;
	}

	private function escape($string)
	{
	return strtr($string, array('"'=>'\\"', '\\' => '\\\\'));
	}

	private function unEscape($string)
	{
	return strtr($string, array('\\"'=>'"', '\\\\' => '\\'));
	}

	}

	?>

File Metadata

Mime Type: text/x-php
Expires: Mon, Apr 6, 12:46 AM (5 d, 8 h ago)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 18831743
Default Alt Text: rcube_imap_generic.php (59 KB)

rcube_imap_generic.phpNo OneTemporaryActions

rcube_imap_generic.phpView Options

File Metadata

Event Timeline

rcube_imap_generic.php
No OneTemporary
Actions

rcube_imap_generic.php
View Options