Swift_Plugins_PopBeforeSmtpPlugin::connect()   B
last analyzed

Complexity

Conditions 6
Paths 6

Size

Total Lines 31
Code Lines 17

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 5
CRAP Score 23.8642

Importance

Changes 0
Metric Value
cc 6
eloc 17
nc 6
nop 0
dl 0
loc 31
ccs 5
cts 24
cp 0.2083
crap 23.8642
rs 8.439
c 0
b 0
f 0
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<?php
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/*
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 * This file is part of SwiftMailer.
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 * (c) 2004-2009 Chris Corbyn
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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/**
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 * Makes sure a connection to a POP3 host has been established prior to connecting to SMTP.
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 *
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 * @author Chris Corbyn
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 */
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class Swift_Plugins_PopBeforeSmtpPlugin implements Swift_Events_TransportChangeListener, Swift_Plugins_Pop_Pop3Connection
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{
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    /**
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     * A delegate connection to use (mostly a test hook)
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     *
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     * @var Swift_Plugins_Pop_Pop3Connection
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     */
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    private $_connection;
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    /**
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     * Hostname of the POP3 server
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     *
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     * @var string
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     */
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    private $_host;
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    /**
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     * Port number to connect on
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     *
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     * @var int
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     */
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    private $_port;
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    /**
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     * Encryption type to use (if any)
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     *
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     * @var null|string
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     */
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    private $_crypto;
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    /**
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     * Username to use (if any)
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     *
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     * @var string
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     */
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    private $_username;
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    /**
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     * Password to use (if any)
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     *
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     * @var string
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     */
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    private $_password;
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    /**
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     * Established connection via TCP socket
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     *
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     * @var resource
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     */
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    private $_socket;
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    /**
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     * Connect timeout in seconds
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     *
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     * @var int
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     */
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    private $_timeout = 10;
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    /**
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     * SMTP Transport to bind to
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     *
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     * @var Swift_Transport
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     */
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    private $_transport;
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    /**
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     * Create a new PopBeforeSmtpPlugin for $host and $port.
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     *
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     * @param string $host
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     * @param int    $port
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     * @param string $crypto as "tls" or "ssl"
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     */
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    public function __construct($host, $port = 110, $crypto = null)
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    {
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        $this->_host = $host;
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        $this->_port = $port;
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        $this->_crypto = $crypto;
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    }
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    /**
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     * Create a new PopBeforeSmtpPlugin for $host and $port.
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     *
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     * @param string $host
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     * @param int    $port
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     * @param string $crypto as "tls" or "ssl"
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     *
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     * @return self
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     */
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    public static function newInstance($host, $port = 110, $crypto = null)
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    {
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        return new self($host, $port, $crypto);
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    }
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    /**
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     * Set a Pop3Connection to delegate to instead of connecting directly.
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     *
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     * @param Swift_Plugins_Pop_Pop3Connection $connection
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     *
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     * @return $this
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     */
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    public function setConnection(Swift_Plugins_Pop_Pop3Connection $connection)
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    {
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        $this->_connection = $connection;
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        return $this;
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    }
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    /**
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     * Bind this plugin to a specific SMTP transport instance.
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     *
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     * @param Swift_Transport
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     */
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    public function bindSmtp(Swift_Transport $smtp)
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    {
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        $this->_transport = $smtp;
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    }
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    /**
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     * Set the connection timeout in seconds (default 10).
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     *
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     * @param int $timeout
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     *
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     * @return $this
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     */
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    public function setTimeout($timeout)
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    {
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        $this->_timeout = (int)$timeout;
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        return $this;
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    }
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    /**
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     * Set the username to use when connecting (if needed).
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     *
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     * @param string $username
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     *
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     * @return $this
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     */
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    public function setUsername($username)
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    {
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        $this->_username = $username;
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        return $this;
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    }
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    /**
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     * Set the password to use when connecting (if needed).
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     *
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     * @param string $password
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     *
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     * @return $this
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     */
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    public function setPassword($password)
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    {
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        $this->_password = $password;
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        return $this;
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    }
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    /**
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     * Connect to the POP3 host and authenticate.
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     *
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     * @throws Swift_Plugins_Pop_Pop3Exception if connection fails
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     */
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    public function connect()
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    {
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        if (isset($this->_connection)) {
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            $this->_connection->connect();
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        } else {
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            if (!isset($this->_socket)) {
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                if (!$socket = fsockopen(
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                    $this->_getHostString(), $this->_port, $errno, $errstr, $this->_timeout
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                )
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                ) {
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                    throw new Swift_Plugins_Pop_Pop3Exception(
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                        sprintf('Failed to connect to POP3 host [%s]: %s', $this->_host, $errstr)
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                    );
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                }
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                $this->_socket = $socket;
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                if (false === $greeting = fgets($this->_socket)) {
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                    throw new Swift_Plugins_Pop_Pop3Exception(
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                        sprintf('Failed to connect to POP3 host [%s]', trim($greeting))
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                    );
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                }
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                $this->_assertOk($greeting);
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                if ($this->_username) {
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                    $this->_command(sprintf("USER %s\r\n", $this->_username));
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                    $this->_command(sprintf("PASS %s\r\n", $this->_password));
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                }
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            }
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        }
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    }
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    /**
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     * Disconnect from the POP3 host.
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     */
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    public function disconnect()
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    {
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        if (isset($this->_connection)) {
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            $this->_connection->disconnect();
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        } else {
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            $this->_command("QUIT\r\n");
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            if (!fclose($this->_socket)) {
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                throw new Swift_Plugins_Pop_Pop3Exception(
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                    sprintf('POP3 host [%s] connection could not be stopped', $this->_host)
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                );
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            }
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            $this->_socket = null;
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        }
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    }
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    /**
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     * Invoked just before a Transport is started.
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     *
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     * @param Swift_Events_TransportChangeEvent $evt
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     */
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    public function beforeTransportStarted(Swift_Events_TransportChangeEvent $evt)
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    {
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        if (
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            isset($this->_transport)
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            &&
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            $this->_transport !== $evt->getTransport()
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        ) {
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            return;
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        }
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        $this->connect();
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        $this->disconnect();
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    }
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    /**
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     * Not used.
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     *
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     * @param Swift_Events_TransportChangeEvent $evt
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     */
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    public function transportStarted(Swift_Events_TransportChangeEvent $evt)
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    {
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    }
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    /**
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     * Not used.
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     *
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     * @param Swift_Events_TransportChangeEvent $evt
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     */
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    public function beforeTransportStopped(Swift_Events_TransportChangeEvent $evt)
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    {
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    }
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    /**
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     * Not used.
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     *
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     * @param Swift_Events_TransportChangeEvent $evt
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     */
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    public function transportStopped(Swift_Events_TransportChangeEvent $evt)
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    {
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    }
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    private function _command($command)
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    {
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        if (!fwrite($this->_socket, $command)) {
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            throw new Swift_Plugins_Pop_Pop3Exception(
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                sprintf('Failed to write command [%s] to POP3 host', trim($command))
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            );
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        }
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        if (false === $response = fgets($this->_socket)) {
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            throw new Swift_Plugins_Pop_Pop3Exception(
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                sprintf('Failed to read from POP3 host after command [%s]', trim($command))
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            );
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        }
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        $this->_assertOk($response);
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        return $response;
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    }
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    private function _assertOk($response)
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    {
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        if (0 !== strpos($response, '+OK')) {
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            throw new Swift_Plugins_Pop_Pop3Exception(
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                sprintf('POP3 command failed [%s]', trim($response))
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            );
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        }
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    }
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    private function _getHostString()
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    {
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        $host = $this->_host;
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        switch (Swift::strtolowerWithStaticCache($this->_crypto)) {
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            case 'ssl':
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                $host = 'ssl://' . $host;
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                break;
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            case 'tls':
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                $host = 'tls://' . $host;
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                break;
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        }
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        return $host;
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    }
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}
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