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+<?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) 2005-2015 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) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+class Zend_Mail_Protocol_Pop3
+{
+ /**
+ * Default timeout in seconds for initiating session
+ */
+ const TIMEOUT_CONNECTION = 30;
+
+ /**
+ * saves if server supports top
+ * @var null|bool
+ */
+ public $hasTop = null;
+
+ /**
+ * socket to pop3
+ * @var null|resource
+ */
+ protected $_socket;
+
+ /**
+ * greeting timestamp for apop
+ * @var null|string
+ */
+ protected $_timestamp;
+
+
+ /**
+ * Public constructor
+ *
+ * @param string $host hostname or IP address of POP3 server, if given connect() is called
+ * @param int|null $port port of POP3 server, null for default (110 or 995 for ssl)
+ * @param bool|string $ssl use ssl? 'SSL', 'TLS' or false
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function __construct($host = '', $port = null, $ssl = false)
+ {
+ if ($host) {
+ $this->connect($host, $port, $ssl);
+ }
+ }
+
+
+ /**
+ * Public destructor
+ */
+ public function __destruct()
+ {
+ $this->logout();
+ }
+
+
+ /**
+ * Open connection to POP3 server
+ *
+ * @param string $host hostname or IP address of POP3 server
+ * @param int|null $port of POP3 server, default is 110 (995 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' ? 995 : 110;
+ }
+
+ $errno = 0;
+ $errstr = '';
+ $this->_socket = @fsockopen($host, $port, $errno, $errstr, self::TIMEOUT_CONNECTION);
+ if (!$this->_socket) {
+ /**
+ * @see Zend_Mail_Protocol_Exception
+ */
+ throw new Zend_Mail_Protocol_Exception('cannot connect to host; error = ' . $errstr .
+ ' (errno = ' . $errno . ' )');
+ }
+
+ $welcome = $this->readResponse();
+
+ strtok($welcome, '<');
+ $this->_timestamp = strtok('>');
+ if (!strpos($this->_timestamp, '@')) {
+ $this->_timestamp = null;
+ } else {
+ $this->_timestamp = '<' . $this->_timestamp . '>';
+ }
+
+ if ($ssl === 'TLS') {
+ $this->request('STLS');
+ $result = stream_socket_enable_crypto($this->_socket, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);
+ if (!$result) {
+ /**
+ * @see Zend_Mail_Protocol_Exception
+ */
+ throw new Zend_Mail_Protocol_Exception('cannot enable TLS');
+ }
+ }
+
+ return $welcome;
+ }
+
+
+ /**
+ * Send a request
+ *
+ * @param string $request your request without newline
+ * @return null
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function sendRequest($request)
+ {
+ $result = @fputs($this->_socket, $request . "\r\n");
+ if (!$result) {
+ /**
+ * @see Zend_Mail_Protocol_Exception
+ */
+ throw new Zend_Mail_Protocol_Exception('send failed - connection closed?');
+ }
+ }
+
+
+ /**
+ * read a response
+ *
+ * @param boolean $multiline response has multiple lines and should be read until "<nl>.<nl>"
+ * @return string response
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function readResponse($multiline = false)
+ {
+ $result = @fgets($this->_socket);
+ if (!is_string($result)) {
+ /**
+ * @see Zend_Mail_Protocol_Exception
+ */
+ throw new Zend_Mail_Protocol_Exception('read failed - connection closed?');
+ }
+
+ $result = trim($result);
+ if (strpos($result, ' ')) {
+ list($status, $message) = explode(' ', $result, 2);
+ } else {
+ $status = $result;
+ $message = '';
+ }
+
+ if ($status != '+OK') {
+ /**
+ * @see Zend_Mail_Protocol_Exception
+ */
+ throw new Zend_Mail_Protocol_Exception('last request failed');
+ }
+
+ if ($multiline) {
+ $message = '';
+ $line = fgets($this->_socket);
+ while ($line && rtrim($line, "\r\n") != '.') {
+ if ($line[0] == '.') {
+ $line = substr($line, 1);
+ }
+ $message .= $line;
+ $line = fgets($this->_socket);
+ };
+ }
+
+ return $message;
+ }
+
+
+ /**
+ * Send request and get resposne
+ *
+ * @see sendRequest(), readResponse()
+ *
+ * @param string $request request
+ * @param bool $multiline multiline response?
+ * @return string result from readResponse()
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function request($request, $multiline = false)
+ {
+ $this->sendRequest($request);
+ return $this->readResponse($multiline);
+ }
+
+
+ /**
+ * End communication with POP3 server (also closes socket)
+ *
+ * @return null
+ */
+ public function logout()
+ {
+ if (!$this->_socket) {
+ return;
+ }
+
+ try {
+ $this->request('QUIT');
+ } catch (Zend_Mail_Protocol_Exception $e) {
+ // ignore error - we're closing the socket anyway
+ }
+
+ fclose($this->_socket);
+ $this->_socket = null;
+ }
+
+
+ /**
+ * Get capabilities from POP3 server
+ *
+ * @return array list of capabilities
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function capa()
+ {
+ $result = $this->request('CAPA', true);
+ return explode("\n", $result);
+ }
+
+
+ /**
+ * Login to POP3 server. Can use APOP
+ *
+ * @param string $user username
+ * @param string $password password
+ * @param bool $try_apop should APOP be tried?
+ * @return void
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function login($user, $password, $tryApop = true)
+ {
+ if ($tryApop && $this->_timestamp) {
+ try {
+ $this->request("APOP $user " . md5($this->_timestamp . $password));
+ return;
+ } catch (Zend_Mail_Protocol_Exception $e) {
+ // ignore
+ }
+ }
+
+ $result = $this->request("USER $user");
+ $result = $this->request("PASS $password");
+ }
+
+
+ /**
+ * Make STAT call for message count and size sum
+ *
+ * @param int $messages out parameter with count of messages
+ * @param int $octets out parameter with size in octects of messages
+ * @return void
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function status(&$messages, &$octets)
+ {
+ $messages = 0;
+ $octets = 0;
+ $result = $this->request('STAT');
+
+ list($messages, $octets) = explode(' ', $result);
+ }
+
+
+ /**
+ * Make LIST call for size of message(s)
+ *
+ * @param int|null $msgno number of message, null for all
+ * @return int|array size of given message or list with array(num => size)
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function getList($msgno = null)
+ {
+ if ($msgno !== null) {
+ $result = $this->request("LIST $msgno");
+
+ list(, $result) = explode(' ', $result);
+ return (int)$result;
+ }
+
+ $result = $this->request('LIST', true);
+ $messages = array();
+ $line = strtok($result, "\n");
+ while ($line) {
+ list($no, $size) = explode(' ', trim($line));
+ $messages[(int)$no] = (int)$size;
+ $line = strtok("\n");
+ }
+
+ return $messages;
+ }
+
+
+ /**
+ * Make UIDL call for getting a uniqueid
+ *
+ * @param int|null $msgno number of message, null for all
+ * @return string|array uniqueid of message or list with array(num => uniqueid)
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function uniqueid($msgno = null)
+ {
+ if ($msgno !== null) {
+ $result = $this->request("UIDL $msgno");
+
+ list(, $result) = explode(' ', $result);
+ return $result;
+ }
+
+ $result = $this->request('UIDL', true);
+
+ $result = explode("\n", $result);
+ $messages = array();
+ foreach ($result as $line) {
+ if (!$line) {
+ continue;
+ }
+ list($no, $id) = explode(' ', trim($line), 2);
+ $messages[(int)$no] = $id;
+ }
+
+ return $messages;
+
+ }
+
+
+ /**
+ * Make TOP call for getting headers and maybe some body lines
+ * This method also sets hasTop - before it it's not known if top is supported
+ *
+ * The fallback makes normale RETR call, which retrieves the whole message. Additional
+ * lines are not removed.
+ *
+ * @param int $msgno number of message
+ * @param int $lines number of wanted body lines (empty line is inserted after header lines)
+ * @param bool $fallback fallback with full retrieve if top is not supported
+ * @return string message headers with wanted body lines
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function top($msgno, $lines = 0, $fallback = false)
+ {
+ if ($this->hasTop === false) {
+ if ($fallback) {
+ return $this->retrieve($msgno);
+ } else {
+ /**
+ * @see Zend_Mail_Protocol_Exception
+ */
+ throw new Zend_Mail_Protocol_Exception('top not supported and no fallback wanted');
+ }
+ }
+ $this->hasTop = true;
+
+ $lines = (!$lines || $lines < 1) ? 0 : (int)$lines;
+
+ try {
+ $result = $this->request("TOP $msgno $lines", true);
+ } catch (Zend_Mail_Protocol_Exception $e) {
+ $this->hasTop = false;
+ if ($fallback) {
+ $result = $this->retrieve($msgno);
+ } else {
+ throw $e;
+ }
+ }
+
+ return $result;
+ }
+
+
+ /**
+ * Make a RETR call for retrieving a full message with headers and body
+ *
+ * @deprecated since 1.1.0; this method has a typo - please use retrieve()
+ * @param int $msgno message number
+ * @return string message
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function retrive($msgno)
+ {
+ return $this->retrieve($msgno);
+ }
+
+
+ /**
+ * Make a RETR call for retrieving a full message with headers and body
+ *
+ * @param int $msgno message number
+ * @return string message
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function retrieve($msgno)
+ {
+ $result = $this->request("RETR $msgno", true);
+ return $result;
+ }
+
+ /**
+ * Make a NOOP call, maybe needed for keeping the server happy
+ *
+ * @return null
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function noop()
+ {
+ $this->request('NOOP');
+ }
+
+
+ /**
+ * Make a DELE count to remove a message
+ *
+ * @return null
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function delete($msgno)
+ {
+ $this->request("DELE $msgno");
+ }
+
+
+ /**
+ * Make RSET call, which rollbacks delete requests
+ *
+ * @return null
+ * @throws Zend_Mail_Protocol_Exception
+ */
+ public function undelete()
+ {
+ $this->request('RSET');
+ }
+}