<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Mail
* @subpackage Protocol
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/
/**
* @category Zend
* @package Zend_Mail
* @subpackage Protocol
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Mail_Protocol_Imap
{
/**
* Default timeout in seconds for initiating session
*/
const TIMEOUT_CONNECTION = 30;
/**
* socket to imap server
* @var resource|null
*/
protected $_socket;
/**
* counter for request tag
* @var int
*/
protected $_tagCount = 0;
/**
* Public constructor
*
* @param string $host hostname or IP address of IMAP server, if given connect() is called
* @param int|null $port port of IMAP server, null for default (143 or 993 for ssl)
* @param bool $ssl use ssl? 'SSL', 'TLS' or false
* @throws Zend_Mail_Protocol_Exception
*/
function __construct($host = '', $port = null, $ssl = false)
{
if ($host) {
$this->connect($host, $port, $ssl);
}
}
/**
* Public destructor
*/
public function __destruct()
{
$this->logout();
}
/**
* Open connection to IMAP server
*
* @param string $host hostname or IP address of IMAP server
* @param int|null $port of IMAP server, default is 143 (993 for ssl)
* @param string|bool $ssl use 'SSL', 'TLS' or false
* @return string welcome message
* @throws Zend_Mail_Protocol_Exception
*/
public function connect($host, $port = null, $ssl = false)
{
if ($ssl == 'SSL') {
$host = 'ssl://' . $host;
}
if ($port === null) {
$port = $ssl === 'SSL' ? 993 : 143;
}
$errno = 0;
$errstr = '';
$this->_socket = @fsockopen($host, $port, $errno, $errstr, self::TIMEOUT_CONNECTION);
if (!$this->_socket) {
/**
* @see Zend_Mail_Protocol_Exception
*/
require_once 'Zend/Mail/Protocol/Exception.php';
throw new Zend_Mail_Protocol_Exception('cannot connect to host; error = ' . $errstr .
' (errno = ' . $errno . ' )');
}
if (!$this->_assumedNextLine('* OK')) {
/**
* @see Zend_Mail_Protocol_Exception
*/
require_once 'Zend/Mail/Protocol/Exception.php';
throw new Zend_Mail_Protocol_Exception('host doesn\'t allow connection');
}
if ($ssl === 'TLS') {
$result = $this->requestAndResponse('STARTTLS');
$result = $result && stream_socket_enable_crypto($this->_socket, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);
if (!$result) {
/**
* @see Zend_Mail_Protocol_Exception
*/
require_once 'Zend/Mail/Protocol/Exception.php';
throw new Zend_Mail_Protocol_Exception('cannot enable TLS');
}
}
}
/**
* get the next line from socket with error checking, but nothing else
*
* @return string next line
* @throws Zend_Mail_Protocol_Exception
*/
protected function _nextLine()
{
$line = @fgets($this->_socket);
if ($line === false) {
/**
* @see Zend_Mail_Protocol_Exception
*/
require_once 'Zend/Mail/Protocol/Exception.php';
throw new Zend_Mail_Protocol_Exception('cannot read - connection closed?');
}
return $line;
}
/**
* get next line and assume it starts with $start. some requests give a simple
* feedback so we can quickly check if we can go on.
*
* @param string $start the first bytes we assume to be in the next line
* @return bool line starts with $start
* @throws Zend_Mail_Protocol_Exception
*/
protected function _assumedNextLine($start)
{
$line = $this->_nextLine();
return strpos($line, $start) === 0;
}
/**
* get next line and split the tag. that's the normal case for a response line
*
* @param string $tag tag of line is returned by reference
* @return string next line
* @throws Zend_Mail_Protocol_Exception
*/
protected function _nextTaggedLine(&$tag)
{
$line = $this->_nextLine();
// seperate tag from line
list($tag, $line) = explode(' ', $line, 2);
return $line;
}
/**
* split a given line in tokens. a token is literal of any form or a list
*
* @param string $line line to decode
* @return array tokens, literals are returned as string, lists as array
* @throws Zend_Mail_Protocol_Exception
*/
protected function _decodeLine($line)
{
$tokens = array();
$stack = array();
/*
We start to decode the response here. The unterstood tokens are:
literal
"literal" or also "lit\\er\"al"
{bytes}<NL>literal
(literals*)
All tokens are returned in an array. Literals in braces (the last unterstood
token in the list) are returned as an array of tokens. I.e. the following response:
"foo" baz {3}<NL>bar ("f\\\"oo" bar)
would be returned as:
array('foo', 'baz', 'bar', array('f\\\"oo', 'bar'));
// TODO: add handling of '[' and ']' to parser for easier handling of response text
*/
// replace any trailling <NL> including spaces with a single space
$line = rtrim($line) . ' ';
while (($pos = strpos($line, ' ')) !== false) {
$token = substr($line, 0, $pos);
while ($token[0] == '(') {
array_push($stack, $tokens);
$tokens = array();
$token = substr($token, 1);
}
if ($token[0] == '"') {
if (preg_match('%^\(*"((.|\\\\|\\")*?)" *%', $line, $matches)) {
$tokens[] = $matches[1];
$line = substr($line, strlen($matches[0]));
continue;
}
}
if ($token[0] == '{') {
$endPos = strpos($token, '}');
$chars = substr($token, 1, $endPos - 1);
if (is_numeric($chars)) {
$token = '';
while (strlen($token) < $chars) {
$token .= $this->_nextLine();
}
$line = '';
if (strlen($token) > $chars) {
$line = substr($token, $chars);
$token = substr($token, 0, $chars);
} else {
$line .= $this->_nextLine();
}
$tokens[] = $token;
$line = trim($line) . ' ';
continue;
}
}
if ($stack && $token[strlen($token) - 1] == ')') {
// closing braces are not seperated by spaces, so we need to count them
$braces = strlen($token);
$token = rtrim($token, ')');
// only count braces if more than one
$braces -= strlen($token) + 1;
// only add if token had more than just closing braces
if (rtrim($token) != '') {
$tokens[] = rtrim($token);
}
$token = $tokens;
$tokens = array_pop($stack);
// special handline if more than one closing brace
while ($braces-- > 0) {
$tokens[] = $token;
$token = $tokens;
$tokens = array_pop($stack);
}
}
$tokens[] = $token;
$line = substr($line, $pos + 1);
}
// maybe the server forgot to send some closing braces
while ($stack) {
$child = $tokens;
$tokens = array_pop($stack);
$tokens[] = $child;
}
return $tokens;
}
/**
* read a response "line" (could also be more than one real line if response has {..}<NL>)
* and do a simple decode
*
* @param array|string $tokens decoded tokens are returned by reference, if $dontParse
* is true the unparsed line is returned here
* @param string $wantedTag check for this tag for response code. Default '*' is
* continuation tag.
* @param bool $dontParse if true only the unparsed line is returned $tokens
* @return bool if returned tag matches wanted tag
* @throws Zend_Mail_Protocol_Exception
*/
public function readLine(&$tokens = array(), $wantedTag = '*', $dontParse = false)
{
$line = $this->_nextTaggedLine($tag);
if (!$dontParse) {
$tokens = $this->_decodeLine($line);
} else {
$tokens = $line;
}
// if tag is wanted tag we might be at the end of a multiline response
return $tag == $wantedTag;
}
/**
* read all lines of response until given tag is found (last line of response)
*
* @param string $tag the tag of your request
* @param string|array $filter you can filter the response so you get only the
* given response lines
* @param bool $dontParse if true every line is returned unparsed instead of
* the decoded tokens
* @return null|bool|array tokens if success, false if error, null if bad request
* @throws Zend_Mail_Protocol_Exception
*/
public function readResponse($tag, $dontParse = false)
{
$lines = array();
while (!$this->readLine($tokens, $tag, $dontParse)) {
$lines[] = $tokens;
}
if ($dontParse) {
// last to chars are still needed for response code
$tokens = array(substr($tokens, 0, 2));
}
// last line has response code
if ($tokens[0] == 'OK') {
return $lines ? $lines : true;
} else if ($tokens[0] == 'NO'){
return false;
}
return null;
}
/**
* send a request
*
* @param string $command your request command
* @param array $tokens additional parameters to command, use escapeString() to prepare
* @param string $tag provide a tag otherwise an autogenerated is returned
* @return null
* @throws Zend_Mail_Protocol_Exception
*/
public function sendRequest($command, $tokens = array(), &$tag = null)
{
if (!$tag) {
++$this->_tagCount;
$tag = 'TAG' . $this->_tagCount;
}
$line = $tag . ' ' . $command;
foreach ($tokens as $token) {
if (is_array($token)) {
if (@fputs($this->_socket, $line . ' ' . $token[0] . "\r\n") === false) {
/**
* @see Zend_Mail_Protocol_Exception
*/
require_once 'Zend/Mail/Protocol/Exception.php';
throw new Zend_Mail_Protocol_Exception('cannot write - connection closed?');
}
if (!$this->_assumedNextLine('+ ')) {
/**
* @see Zend_Mail_Protocol_Exception
*/
require_once 'Zend/Mail/Protocol/Exception.php';
throw new Zend_Mail_Protocol_Exception('cannot send literal string');
}
$line = $token[1];
} else {
$line .= ' ' . $token;
}
}
if (@fputs($this->_socket, $line . "\r\n") === false) {
/**
* @see Zend_Mail_Protocol_Exception
*/
require_once 'Zend/Mail/Protocol/Exception.php';
throw new Zend_Mail_Protocol_Exception('cannot write - connection closed?');
}
}
/**
* send a request and get response at once
*
* @param string $command command as in sendRequest()
* @param array $tokens parameters as in sendRequest()
* @param bool $dontParse if true unparsed lines are returned instead of tokens
* @return mixed response as in readResponse()
* @throws Zend_Mail_Protocol_Exception
*/
public function requestAndResponse($command, $tokens = array(), $dontParse = false)
{
$this->sendRequest($command, $tokens, $tag);
$response = $this->readResponse($tag, $dontParse);
return $response;
}
/**
* escape one or more literals i.e. for sendRequest
*
* @param string|array $string the literal/-s
* @return string|array escape literals, literals with newline ar returned
* as array('{size}', 'string');
*/
public function escapeString($string)
{
if (func_num_args() < 2) {
if (strpos($string, "\n") !== false) {
return array('{' . strlen($string) . '}', $string);
} else {
return '"' . str_replace(array('\\', '"'), array('\\\\', '\\"'), $string) . '"';
}
}
$result = array();
foreach (func_get_args() as $string) {
$result[] = $this->escapeString($string);
}
return $result;
}
/**
* escape a list with literals or lists
*
* @param array $list list with literals or lists as PHP array
* @return string escaped list for imap
*/
public function escapeList($list)
{
$result = array();
foreach ($list as $k => $v) {
if (!is_array($v)) {
// $result[] = $this->escapeString($v);
$result[] = $v;
continue;
}
$result[] = $this->escapeList($v);
}
return '(' . implode(' ', $result) . ')';
}
/**
* Login to IMAP server.
*
* @param string $user username
* @param string $password password
* @return bool success
* @throws Zend_Mail_Protocol_Exception
*/
public function login($user, $password)
{
return $this->requestAndResponse('LOGIN', $this->escapeString($user, $password), true);
}
/**
* logout of imap server
*
* @return bool success
*/
public function logout()
{
$result = false;
if ($this->_socket) {
try {
$result = $this->requestAndResponse('LOGOUT', array(), true);
} catch (Zend_Mail_Protocol_Exception $e) {
// ignoring exception
}
fclose($this->_socket);
$this->_socket = null;
}
return $result;
}
/**
* Get capabilities from IMAP server
*
* @return array list of capabilities
* @throws Zend_Mail_Protocol_Exception
*/
public function capability()
{
$response = $this->requestAndResponse('CAPABILITY');
if (!$response) {
return $response;
}
$capabilities = array();
foreach ($response as $line) {
$capabilities = array_merge($capabilities, $line);
}
return $capabilities;
}
/**
* Examine and select have the same response. The common code for both
* is in this method
*
* @param string $command can be 'EXAMINE' or 'SELECT' and this is used as command
* @param string $box which folder to change to or examine
* @return bool|array false if error, array with returned information
* otherwise (flags, exists, recent, uidvalidity)
* @throws Zend_Mail_Protocol_Exception
*/
public function examineOrSelect($command = 'EXAMINE', $box = 'INBOX')
{
$this->sendRequest($command, array($this->escapeString($box)), $tag);
$result = array();
while (!$this->readLine($tokens, $tag)) {
if ($tokens[0] == 'FLAGS') {
array_shift($tokens);
$result['flags'] = $tokens;
continue;
}
switch ($tokens[1]) {
case 'EXISTS':
case 'RECENT':
$result[strtolower($tokens[1])] = $tokens[0];
break;
case '[UIDVALIDITY':
$result['uidvalidity'] = (int)$tokens[2];
break;
default:
// ignore
}
}
if ($tokens[0] != 'OK') {
return false;
}
return $result;
}
/**
* change folder
*
* @param string $box change to this folder
* @return bool|array see examineOrselect()
* @throws Zend_Mail_Protocol_Exception
*/
public function select($box = 'INBOX')
{
return $this->examineOrSelect('SELECT', $box);
}
/**
* examine folder
*
* @param string $box examine this folder
* @return bool|array see examineOrselect()
* @throws Zend_Mail_Protocol_Exception
*/
public function examine($box = 'INBOX')
{
return $this->examineOrSelect('EXAMINE', $box);
}
/**
* fetch one or more items of one or more messages
*
* @param string|array $items items to fetch from message(s) as string (if only one item)
* or array of strings
* @param int $from message for items or start message if $to !== null
* @param int|null $to if null only one message ($from) is fetched, else it's the
* last message, INF means last message avaible
* @return string|array if only one item of one message is fetched it's returned as string
* if items of one message are fetched it's returned as (name => value)
* if one items of messages are fetched it's returned as (msgno => value)
* if items of messages are fetchted it's returned as (msgno => (name => value))
* @throws Zend_Mail_Protocol_Exception
*/
public function fetch($items, $from, $to = null)
{
if (is_array($from)) {
$set = implode(',', $from);
} else if ($to === null) {
$set = (int)$from;
} else if ($to === INF) {
$set = (int)$from . ':*';
} else {
$set = (int)$from . ':' . (int)$to;
}
$items = (array)$items;
$itemList = $this->escapeList($items);
$this->sendRequest('FETCH', array($set, $itemList), $tag);
$result = array();
while (!$this->readLine($tokens, $tag)) {
// ignore other responses
if ($tokens[1] != 'FETCH') {
continue;
}
// ignore other messages
if ($to === null && !is_array($from) && $tokens[0] != $from) {
continue;
}
// if we only want one item we return that one directly
if (count($items) == 1) {
if ($tokens[2][0] == $items[0]) {
$data = $tokens[2][1];
} else {
// maybe the server send an other field we didn't wanted
$count = count($tokens[2]);
// we start with 2, because 0 was already checked
for ($i = 2; $i < $count; $i += 2) {
if ($tokens[2][$i] != $items[0]) {
continue;
}
$data = $tokens[2][$i + 1];
break;
}
}
} else {
$data = array();
while (key($tokens[2]) !== null) {
$data[current($tokens[2])] = next($tokens[2]);
next($tokens[2]);
}
}
// if we want only one message we can ignore everything else and just return
if ($to === null && !is_array($from) && $tokens[0] == $from) {
// we still need to read all lines
while (!$this->readLine($tokens, $tag));
return $data;
}
$result[$tokens[0]] = $data;
}
if ($to === null && !is_array($from)) {
/**
* @see Zend_Mail_Protocol_Exception
*/
require_once 'Zend/Mail/Protocol/Exception.php';
throw new Zend_Mail_Protocol_Exception('the single id was not found in response');
}
return $result;
}
/**
* get mailbox list
*
* this method can't be named after the IMAP command 'LIST', as list is a reserved keyword
*
* @param string $reference mailbox reference for list
* @param string $mailbox mailbox name match with wildcards
* @return array mailboxes that matched $mailbox as array(globalName => array('delim' => .., 'flags' => ..))
* @throws Zend_Mail_Protocol_Exception
*/
public function listMailbox($reference = '', $mailbox = '*')
{
$result = array();
$list = $this->requestAndResponse('LIST', $this->escapeString($reference, $mailbox));
if (!$list || $list === true) {
return $result;
}
foreach ($list as $item) {
if (count($item) != 4 || $item[0] != 'LIST') {
continue;
}
$result[$item[3]] = array('delim' => $item[2], 'flags' => $item[1]);
}
return $result;
}
/**
* set flags
*
* @param array $flags flags to set, add or remove - see $mode
* @param int $from message for items or start message if $to !== null
* @param int|null $to if null only one message ($from) is fetched, else it's the
* last message, INF means last message avaible
* @param string|null $mode '+' to add flags, '-' to remove flags, everything else sets the flags as given
* @param bool $silent if false the return values are the new flags for the wanted messages
* @return bool|array new flags if $silent is false, else true or false depending on success
* @throws Zend_Mail_Protocol_Exception
*/
public function store(array $flags, $from, $to = null, $mode = null, $silent = true)
{
$item = 'FLAGS';
if ($mode == '+' || $mode == '-') {
$item = $mode . $item;
}
if ($silent) {
$item .= '.SILENT';
}
$flags = $this->escapeList($flags);
$set = (int)$from;
if ($to != null) {
$set .= ':' . ($to == INF ? '*' : (int)$to);
}
$result = $this->requestAndResponse('STORE', array($set, $item, $flags), $silent);
if ($silent) {
return $result ? true : false;
}
$tokens = $result;
$result = array();
foreach ($tokens as $token) {
if ($token[1] != 'FETCH' || $token[2][0] != 'FLAGS') {
continue;
}
$result[$token[0]] = $token[2][1];
}
return $result;
}
/**
* append a new message to given folder
*
* @param string $folder name of target folder
* @param string $message full message content
* @param array $flags flags for new message
* @param string $date date for new message
* @return bool success
* @throws Zend_Mail_Protocol_Exception
*/
public function append($folder, $message, $flags = null, $date = null)
{
$tokens = array();
$tokens[] = $this->escapeString($folder);
if ($flags !== null) {
$tokens[] = $this->escapeList($flags);
}
if ($date !== null) {
$tokens[] = $this->escapeString($date);
}
$tokens[] = $this->escapeString($message);
return $this->requestAndResponse('APPEND', $tokens, true);
}
/**
* copy message set from current folder to other folder
*
* @param string $folder destination folder
* @param int|null $to if null only one message ($from) is fetched, else it's the
* last message, INF means last message avaible
* @return bool success
* @throws Zend_Mail_Protocol_Exception
*/
public function copy($folder, $from, $to = null)
{
$set = (int)$from;
if ($to != null) {
$set .= ':' . ($to == INF ? '*' : (int)$to);
}
return $this->requestAndResponse('COPY', array($set, $this->escapeString($folder)), true);
}
/**
* create a new folder (and parent folders if needed)
*
* @param string $folder folder name
* @return bool success
*/
public function create($folder)
{
return $this->requestAndResponse('CREATE', array($this->escapeString($folder)), true);
}
/**
* rename an existing folder
*
* @param string $old old name
* @param string $new new name
* @return bool success
*/
public function rename($old, $new)
{
return $this->requestAndResponse('RENAME', $this->escapeString($old, $new), true);
}
/**
* remove a folder
*
* @param string $folder folder name
* @return bool success
*/
public function delete($folder)
{
return $this->requestAndResponse('DELETE', array($this->escapeString($folder)), true);
}
/**
* permanently remove messages
*
* @return bool success
*/
public function expunge()
{
// TODO: parse response?
return $this->requestAndResponse('EXPUNGE');
}
/**
* send noop
*
* @return bool success
*/
public function noop()
{
// TODO: parse response
return $this->requestAndResponse('NOOP');
}
/**
* do a search request
*
* This method is currently marked as internal as the API might change and is not
* safe if you don't take precautions.
*
* @internal
* @return array message ids
*/
public function search(array $params)
{
$response = $this->requestAndResponse('SEARCH', $params);
if (!$response) {
return $response;
}
foreach ($response as $ids) {
if ($ids[0] == 'SEARCH') {
array_shift($ids);
return $ids;
}
}
return array();
}
}