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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 Postman_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 $Id$
- */
-
-
-/**
- * @see Postman_Zend_Validate
- */
-// require_once 'Zend/Validate.php';
-
-
-/**
- * @see Postman_Zend_Validate_Hostname
- */
-// require_once 'Zend/Validate/Hostname.php';
-
-
-/**
- * Postman_Zend_Mail_Protocol_Abstract
- *
- * Provides low-level methods for concrete adapters to communicate with a remote mail server and track requests and responses.
- *
- * @category Zend
- * @package Postman_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 $Id$
- * @todo Implement proxy settings
- */
-abstract class Postman_Zend_Mail_Protocol_Abstract
-{
- /**
- * Mail default EOL string
- */
- const EOL = "\r\n";
-
-
- /**
- * Default timeout in seconds for initiating session
- */
- const TIMEOUT_CONNECTION = 30;
-
- /**
- * Maximum of the transaction log
- * @var integer
- */
- protected $_maximumLog = 64;
-
-
- /**
- * Hostname or IP address of remote server
- * @var string
- */
- protected $_host;
-
-
- /**
- * Port number of connection
- * @var integer
- */
- protected $_port;
-
-
- /**
- * Instance of Postman_Zend_Validate to check hostnames
- * @var Postman_Zend_Validate
- */
- protected $_validHost;
-
-
- /**
- * Socket connection resource
- * @var resource
- */
- protected $_socket;
-
-
- /**
- * Last request sent to server
- * @var string
- */
- protected $_request;
-
-
- /**
- * Array of server responses to last request
- * @var array
- */
- protected $_response;
-
-
- /**
- * String template for parsing server responses using sscanf (default: 3 digit code and response string)
- * @var resource
- * @deprecated Since 1.10.3
- */
- protected $_template = '%d%s';
-
-
- /**
- * Log of mail requests and server responses for a session
- * @var array
- */
- private $_log = array();
-
-
- /**
- * Constructor.
- *
- * @param string $host OPTIONAL Hostname of remote connection (default: 127.0.0.1)
- * @param integer $port OPTIONAL Port number (default: null)
- * @throws Postman_Zend_Mail_Protocol_Exception
- * @return void
- */
- public function __construct($host = '127.0.0.1', $port = null)
- {
- $this->_validHost = new Postman_Zend_Validate();
- $this->_validHost->addValidator(new Postman_Zend_Validate_Hostname(Postman_Zend_Validate_Hostname::ALLOW_ALL));
-
- if (!$this->_validHost->isValid($host)) {
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception(join(', ', $this->_validHost->getMessages()));
- }
-
- $this->_host = $host;
- $this->_port = $port;
- $this->_maximumLog = PostmanOptions::getInstance()->getTranscriptSize();
- }
-
-
- /**
- * Class destructor to cleanup open resources
- *
- * @return void
- */
- public function __destruct()
- {
- $this->_disconnect();
- }
-
- /**
- * Set the maximum log size
- *
- * @param integer $maximumLog Maximum log size
- * @return void
- */
- public function setMaximumLog($maximumLog)
- {
- $this->_maximumLog = (int) $maximumLog;
- }
-
-
- /**
- * Get the maximum log size
- *
- * @return int the maximum log size
- */
- public function getMaximumLog()
- {
- return $this->_maximumLog;
- }
-
-
- /**
- * Create a connection to the remote host
- *
- * Concrete adapters for this class will implement their own unique connect scripts, using the _connect() method to create the socket resource.
- */
- abstract public function connect();
-
-
- /**
- * Retrieve the last client request
- *
- * @return string
- */
- public function getRequest()
- {
- return $this->_request;
- }
-
-
- /**
- * Retrieve the last server response
- *
- * @return array
- */
- public function getResponse()
- {
- return $this->_response;
- }
-
-
- /**
- * Retrieve the transaction log
- *
- * @return string
- */
- public function getLog()
- {
- return implode('', $this->_log);
- }
-
-
- /**
- * Reset the transaction log
- *
- * @return void
- */
- public function resetLog()
- {
- $this->_log = array();
- }
-
- /**
- * Add the transaction log
- *
- * @param string new transaction
- * @return void
- */
- protected function _addLog($value)
- {
- if ($this->_maximumLog >= 0 && count($this->_log) >= $this->_maximumLog) {
- array_shift($this->_log);
- }
-
- $this->_log[] = $value;
- }
-
- /**
- * Connect to the server using the supplied transport and target
- *
- * An example $remote string may be 'tcp://mail.example.com:25' or 'ssh://hostname.com:2222'
- *
- * @param string $remote Remote
- * @throws Postman_Zend_Mail_Protocol_Exception
- * @return boolean
- */
- protected function _connect($remote)
- {
- $errorNum = 0;
- $errorStr = '';
-
- // open connection
- $this->_socket = @stream_socket_client($remote, $errorNum, $errorStr, self::TIMEOUT_CONNECTION);
-
- if ($this->_socket === false) {
- if ($errorNum == 0) {
- $errorStr = 'Could not open socket';
- }
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception($errorStr);
- }
-
- if (($result = $this->_setStreamTimeout(self::TIMEOUT_CONNECTION)) === false) {
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception('Could not set stream timeout');
- }
-
- return $result;
- }
-
-
- /**
- * Disconnect from remote host and free resource
- *
- * @return void
- */
- protected function _disconnect()
- {
- if (is_resource($this->_socket)) {
- fclose($this->_socket);
- }
- }
-
-
- /**
- * Send the given request followed by a LINEEND to the server.
- *
- * @param string $request
- * @throws Postman_Zend_Mail_Protocol_Exception
- * @return integer|boolean Number of bytes written to remote host
- */
- protected function _send($request)
- {
- if (!is_resource($this->_socket)) {
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception('No connection has been established to ' . $this->_host);
- }
-
- $this->_request = $request;
-
- $result = fwrite($this->_socket, $request . self::EOL);
-
- // Save request to internal log
- $this->_addLog($request . self::EOL);
-
- if ($result === false) {
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception('Could not send request to ' . $this->_host);
- }
-
- return $result;
- }
-
-
- /**
- * Get a line from the stream.
- *
- * @var integer $timeout Per-request timeout value if applicable
- * @throws Postman_Zend_Mail_Protocol_Exception
- * @return string
- */
- protected function _receive($timeout = null)
- {
- if (!is_resource($this->_socket)) {
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception('No connection has been established to ' . $this->_host);
- }
-
- // Adapters may wish to supply per-commend timeouts according to appropriate RFC
- if ($timeout !== null) {
- $this->_setStreamTimeout($timeout);
- }
-
- // Retrieve response
- $reponse = fgets($this->_socket, 1024);
-
- // Save request to internal log
- $this->_addLog($reponse);
-
- // Check meta data to ensure connection is still valid
- $info = stream_get_meta_data($this->_socket);
-
- if (!empty($info['timed_out'])) {
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception($this->_host . ' has timed out');
- }
-
- if ($reponse === false) {
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception('Could not read from ' . $this->_host);
- }
-
- return $reponse;
- }
-
-
- /**
- * Parse server response for successful codes
- *
- * Read the response from the stream and check for expected return code.
- * Throws a Postman_Zend_Mail_Protocol_Exception if an unexpected code is returned.
- *
- * @param string|array $code One or more codes that indicate a successful response
- * @throws Postman_Zend_Mail_Protocol_Exception
- * @return string Last line of response string
- */
- protected function _expect($code, $timeout = null)
- {
- $userTimeout = PostmanOptions::getInstance()->getReadTimeout();
- if($timeout > $userTimeout) {
- $timeout = $userTimeout;
- }
- $this->_response = array();
- $cmd = '';
- $more = '';
- $msg = '';
- $errMsg = '';
-
- if (!is_array($code)) {
- $code = array($code);
- }
-
- do {
- $this->_response[] = $result = $this->_receive($timeout);
- list($cmd, $more, $msg) = preg_split('/([\s-]+)/', $result, 2, PREG_SPLIT_DELIM_CAPTURE);
-
- if ($errMsg !== '') {
- $errMsg .= ' ' . $msg;
- } elseif ($cmd === null || !in_array($cmd, $code)) {
- $errMsg = $msg;
- }
-
- } while (strpos($more, '-') === 0); // The '-' message prefix indicates an information string instead of a response string.
-
- if ($errMsg !== '') {
- /**
- * @see Postman_Zend_Mail_Protocol_Exception
- */
-// require_once 'Zend/Mail/Protocol/Exception.php';
- throw new Postman_Zend_Mail_Protocol_Exception($errMsg, $cmd);
- }
-
- return $msg;
- }
-
- /**
- * Set stream timeout
- *
- * @param integer $timeout
- * @return boolean
- */
- protected function _setStreamTimeout($timeout)
- {
- // @jason: added @ to hide PHP warnings if the host has disabled stream_set_timeout
- return @stream_set_timeout($this->_socket, $timeout);
- }
-}