Subversion Repositories SmartDukaan

<?php
/**
 * Send mail using SMTP protocol
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       Cake.Network.Email
 * @since         CakePHP(tm) v 2.0.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */

App::uses('CakeSocket', 'Network');

/**
 * Send mail using SMTP protocol
 *
 * @package       Cake.Network.Email
 */
class SmtpTransport extends AbstractTransport {

/**
 * Socket to SMTP server
 *
 * @var CakeSocket
 */
        protected $_socket;

/**
 * CakeEmail
 *
 * @var CakeEmail
 */
        protected $_cakeEmail;

/**
 * Content of email to return
 *
 * @var string
 */
        protected $_content;

/**
 * The response of the last sent SMTP command.
 *
 * @var array
 */
        protected $_lastResponse = array();

/**
 * Returns the response of the last sent SMTP command.
 *
 * A response consists of one or more lines containing a response
 * code and an optional response message text:
 * ```
 * array(
 *     array(
 *         'code' => '250',
 *         'message' => 'mail.example.com'
 *     ),
 *     array(
 *         'code' => '250',
 *         'message' => 'PIPELINING'
 *     ),
 *     array(
 *         'code' => '250',
 *         'message' => '8BITMIME'
 *     ),
 *     // etc...
 * )
 * ```
 *
 * @return array
 */
        public function getLastResponse() {
                return $this->_lastResponse;
        }

/**
 * Send mail
 *
 * @param CakeEmail $email CakeEmail
 * @return array
 * @throws SocketException
 */
        public function send(CakeEmail $email) {
                $this->_cakeEmail = $email;

                $this->_connect();
                $this->_auth();
                $this->_sendRcpt();
                $this->_sendData();
                $this->_disconnect();

                return $this->_content;
        }

/**
 * Set the configuration
 *
 * @param array $config Configuration options.
 * @return array Returns configs
 */
        public function config($config = null) {
                if ($config === null) {
                        return $this->_config;
                }
                $default = array(
                        'host' => 'localhost',
                        'port' => 25,
                        'timeout' => 30,
                        'username' => null,
                        'password' => null,
                        'client' => null,
                        'tls' => false
                );
                $this->_config = array_merge($default, $this->_config, $config);
                return $this->_config;
        }

/**
 * Parses and stores the reponse lines in `'code' => 'message'` format.
 *
 * @param array $responseLines Response lines to parse.
 * @return void
 */
        protected function _bufferResponseLines(array $responseLines) {
                $response = array();
                foreach ($responseLines as $responseLine) {
                        if (preg_match('/^(\d{3})(?:[ -]+(.*))?$/', $responseLine, $match)) {
                                $response[] = array(
                                        'code' => $match[1],
                                        'message' => isset($match[2]) ? $match[2] : null
                                );
                        }
                }
                $this->_lastResponse = array_merge($this->_lastResponse, $response);
        }

/**
 * Connect to SMTP Server
 *
 * @return void
 * @throws SocketException
 */
        protected function _connect() {
                $this->_generateSocket();
                if (!$this->_socket->connect()) {
                        throw new SocketException(__d('cake_dev', 'Unable to connect to SMTP server.'));
                }
                $this->_smtpSend(null, '220');

                if (isset($this->_config['client'])) {
                        $host = $this->_config['client'];
                } elseif ($httpHost = env('HTTP_HOST')) {
                        list($host) = explode(':', $httpHost);
                } else {
                        $host = 'localhost';
                }

                try {
                        $this->_smtpSend("EHLO {$host}", '250');
                        if ($this->_config['tls']) {
                                $this->_smtpSend("STARTTLS", '220');
                                $this->_socket->enableCrypto('tls');
                                $this->_smtpSend("EHLO {$host}", '250');
                        }
                } catch (SocketException $e) {
                        if ($this->_config['tls']) {
                                throw new SocketException(__d('cake_dev', 'SMTP server did not accept the connection or trying to connect to non TLS SMTP server using TLS.'));
                        }
                        try {
                                $this->_smtpSend("HELO {$host}", '250');
                        } catch (SocketException $e2) {
                                throw new SocketException(__d('cake_dev', 'SMTP server did not accept the connection.'));
                        }
                }
        }

/**
 * Send authentication
 *
 * @return void
 * @throws SocketException
 */
        protected function _auth() {
                if (isset($this->_config['username']) && isset($this->_config['password'])) {
                        $replyCode = $this->_smtpSend('AUTH LOGIN', '334|500|502|504');
                        if ($replyCode == '334') {
                                try {
                                        $this->_smtpSend(base64_encode($this->_config['username']), '334');
                                } catch (SocketException $e) {
                                        throw new SocketException(__d('cake_dev', 'SMTP server did not accept the username.'));
                                }
                                try {
                                        $this->_smtpSend(base64_encode($this->_config['password']), '235');
                                } catch (SocketException $e) {
                                        throw new SocketException(__d('cake_dev', 'SMTP server did not accept the password.'));
                                }
                        } elseif ($replyCode == '504') {
                                throw new SocketException(__d('cake_dev', 'SMTP authentication method not allowed, check if SMTP server requires TLS.'));
                        } else {
                                throw new SocketException(__d('cake_dev', 'AUTH command not recognized or not implemented, SMTP server may not require authentication.'));
                        }
                }
        }

/**
 * Prepares the `MAIL FROM` SMTP command.
 *
 * @param string $email The email address to send with the command.
 * @return string
 */
        protected function _prepareFromCmd($email) {
                return 'MAIL FROM:<' . $email . '>';
        }

/**
 * Prepares the `RCPT TO` SMTP command.
 *
 * @param string $email The email address to send with the command.
 * @return string
 */
        protected function _prepareRcptCmd($email) {
                return 'RCPT TO:<' . $email . '>';
        }

/**
 * Prepares the `from` email address.
 *
 * @return array
 */
        protected function _prepareFromAddress() {
                $from = $this->_cakeEmail->returnPath();
                if (empty($from)) {
                        $from = $this->_cakeEmail->from();
                }
                return $from;
        }

/**
 * Prepares the recipient email addresses.
 *
 * @return array
 */
        protected function _prepareRecipientAddresses() {
                $to = $this->_cakeEmail->to();
                $cc = $this->_cakeEmail->cc();
                $bcc = $this->_cakeEmail->bcc();
                return array_merge(array_keys($to), array_keys($cc), array_keys($bcc));
        }

/**
 * Prepares the message headers.
 *
 * @return array
 */
        protected function _prepareMessageHeaders() {
                return $this->_cakeEmail->getHeaders(array('from', 'sender', 'replyTo', 'readReceipt', 'to', 'cc', 'subject'));
        }

/**
 * Prepares the message body.
 *
 * @return string
 */
        protected function _prepareMessage() {
                $lines = $this->_cakeEmail->message();
                $messages = array();
                foreach ($lines as $line) {
                        if ((!empty($line)) && ($line[0] === '.')) {
                                $messages[] = '.' . $line;
                        } else {
                                $messages[] = $line;
                        }
                }
                return implode("\r\n", $messages);
        }

/**
 * Send emails
 *
 * @return void
 * @throws SocketException
 */
        protected function _sendRcpt() {
                $from = $this->_prepareFromAddress();
                $this->_smtpSend($this->_prepareFromCmd(key($from)));

                $emails = $this->_prepareRecipientAddresses();
                foreach ($emails as $email) {
                        $this->_smtpSend($this->_prepareRcptCmd($email));
                }
        }

/**
 * Send Data
 *
 * @return void
 * @throws SocketException
 */
        protected function _sendData() {
                $this->_smtpSend('DATA', '354');

                $headers = $this->_headersToString($this->_prepareMessageHeaders());
                $message = $this->_prepareMessage();

                $this->_smtpSend($headers . "\r\n\r\n" . $message . "\r\n\r\n\r\n.");
                $this->_content = array('headers' => $headers, 'message' => $message);
        }

/**
 * Disconnect
 *
 * @return void
 * @throws SocketException
 */
        protected function _disconnect() {
                $this->_smtpSend('QUIT', false);
                $this->_socket->disconnect();
        }

/**
 * Helper method to generate socket
 *
 * @return void
 * @throws SocketException
 */
        protected function _generateSocket() {
                $this->_socket = new CakeSocket($this->_config);
        }

/**
 * Protected method for sending data to SMTP connection
 *
 * @param string $data data to be sent to SMTP server
 * @param string|bool $checkCode code to check for in server response, false to skip
 * @return void
 * @throws SocketException
 */
        protected function _smtpSend($data, $checkCode = '250') {
                $this->_lastResponse = array();

                if ($data !== null) {
                        $this->_socket->write($data . "\r\n");
                }
                while ($checkCode !== false) {
                        $response = '';
                        $startTime = time();
                        while (substr($response, -2) !== "\r\n" && ((time() - $startTime) < $this->_config['timeout'])) {
                                $response .= $this->_socket->read();
                        }
                        if (substr($response, -2) !== "\r\n") {
                                throw new SocketException(__d('cake_dev', 'SMTP timeout.'));
                        }
                        $responseLines = explode("\r\n", rtrim($response, "\r\n"));
                        $response = end($responseLines);

                        $this->_bufferResponseLines($responseLines);

                        if (preg_match('/^(' . $checkCode . ')(.)/', $response, $code)) {
                                if ($code[2] === '-') {
                                        continue;
                                }
                                return $code[1];
                        }
                        throw new SocketException(__d('cake_dev', 'SMTP Error: %s', $response));
                }
        }

}