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system/vendor/swift/Swift/Authenticator/PopB4Smtp/Pop3Connection.php

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+<?php
+
+/**
+ * Swift Mailer PopB4Smtp Pop3 Connection component
+ * Please read the LICENSE file
+ * @author Chris Corbyn <chris@w3style.co.uk>
+ * @package Swift_Authenticator
+ * @license GNU Lesser General Public License
+ */
+
+require_once dirname(__FILE__) . "/../../ClassLoader.php";
+
+/**
+ * Swift PopB4Smtp Authenticator Connection Component for the POP3 server
+ * Provides a I/O wrapper for the POP3 connection
+ * @package Swift_Authenticator
+ * @author Chris Corbyn <chris@w3style.co.uk>
+ */
+class Swift_Authenticator_PopB4Smtp_Pop3Connection
+{
+  /**
+   * Constant for no encyption
+   */
+  const ENC_OFF = 0;
+  /**
+   * Constant for SSL encryption
+   */
+  const ENC_SSL = 1;
+  /**
+   * The server to connect to (IP or FQDN)
+   * @var string
+   */
+  protected $server = null;
+  /**
+   * The port to connect to
+   * @var int
+   */
+  protected $port = null;
+  /**
+   * The open connection resource from fsockopen()
+   * @var resource
+   */
+  protected $handle = null;
+  
+  /**
+   * Constructor
+   * @param string The name of the POP3 server
+   * @param int The port for the POP3 service
+   * @param int The level of encryption to use
+   */
+  public function __construct($server="localhost", $port=110, $encryption=0)
+  {
+    $this->setServer($server);
+    $this->setPort($port);
+    $this->setEncryption($encryption);
+  }
+  /**
+   * Set the server name
+   * @param string The IP or FQDN of the POP3 server
+   */
+  public function setServer($server)
+  {
+    $this->server = (string) $server;
+  }
+  /**
+   * Set the port number for the POP3 server
+   * @param int
+   */
+  public function setPort($port)
+  {
+    $this->port = (int) $port;
+  }
+  /**
+   * Get the server name
+   * @return string
+   */
+  public function getServer()
+  {
+    return $this->server;
+  }
+  /**
+   * Get the remote port number
+   * @return int
+   */
+  public function getPort()
+  {
+    return $this->port;
+  }
+  /**
+   * Set the level of enryption to use (see ENC_OFF or ENC_SSL)
+   * @param int The constant for the encryption level
+   */
+  public function setEncryption($enc)
+  {
+    $this->encryption = (int) $enc;
+  }
+  /**
+   * Get the current encryption level set (corresponds to ENC_SSL or ENC_OFF)
+   * @return int
+   */
+  public function getEncryption()
+  {
+    return $this->encryption;
+  }
+  /**
+   * Check if the response is a +OK response
+   * @throws Swift_ConnectionException Upon bad response
+   */
+  public function assertOk($line)
+  {
+    if (substr($line, 0, 3) != "+OK")
+    {
+      Swift_ClassLoader::load("Swift_ConnectionException");
+      throw new Swift_ConnectionException("The POP3 server did not suitably respond with a +OK response. " .
+      "[" . $line . "]");
+    }
+  }
+  /**
+   * Try to open the connection
+   * @throws Swift_ConnectionException If the connection will not start
+   */
+  public function start()
+  {
+    $url = $this->getServer();
+    if ($this->getEncryption() == self::ENC_SSL) $url = "ssl://" . $url;
+    
+    if ((false === $this->handle = fsockopen($url, $this->getPort(), $errno, $errstr, $timeout)))
+    {
+      Swift_ClassLoader::load("Swift_ConnectionException");
+      throw new Swift_ConnectionException("The POP3 connection failed to start.  The error string returned from fsockopen() is [" . $errstr . "] #" . $errno);
+    }
+  }
+  /**
+   * Try to close the connection
+   * @throws Swift_ConnectionException If the connection won't close
+   */
+  public function stop()
+  {
+    if ($this->handle !== null)
+    {
+      if (false === fclose($this->handle))
+      {
+        Swift_ClassLoader::load("Swift_ConnectionException");
+        throw new Swift_ConnectionException("The POP3 connection did not close successfully.");
+      }
+    }
+    $this->handle = null;
+  }
+  /**
+   * Return the unread buffer contents
+   * @return string
+   * @throws Swift_ConnectionException If the connection will not allow data to be read
+   */
+  public function read()
+  {
+    if (false === $response = fgets($this->handle))
+    {
+      Swift_ClassLoader::load("Swift_ConnectionException");
+      throw new Swift_ConnectionException("Data could not be read from the POP3 connection.");
+    }
+    return trim($response);
+  }
+  /**
+   * Write a command to the remote socket
+   * @param string the command to send (without CRLF)
+   * @throws Swift_ConnectionException If the command cannot be written
+   */
+  public function write($command)
+  {
+    if (false !== fwrite($this->handle, $command . "\r\n"))
+    {
+      Swift_ClassLoader::load("Swift_ConnectionException");
+      throw new Swift_ConnectionException("Data could not be written to the POP3 connection.");
+    }
+  }
+}