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<?php
/* SVN FILE: $Id$ */
/**
* Cake Socket connection class.
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework (http://www.cakephp.org)
* Copyright 2005-2010, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs
* @since CakePHP(tm) v 1.2.0
* @version $Revision$
* @modifiedby $LastChangedBy$
* @lastmodified $Date$
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
App::import('Core', 'Validation');
/**
* Cake network socket connection class.
*
* Core base class for network communication.
*
* @package cake
* @subpackage cake.cake.libs
*/
class CakeSocket extends Object {
/**
* Object description
*
* @var string
* @access public
*/
var $description = 'Remote DataSource Network Socket Interface';
/**
* Base configuration settings for the socket connection
*
* @var array
* @access protected
*/
var $_baseConfig = array(
'persistent' => false,
'host' => 'localhost',
'protocol' => 'tcp',
'port' => 80,
'timeout' => 30
);
/**
* Configuration settings for the socket connection
*
* @var array
* @access public
*/
var $config = array();
/**
* Reference to socket connection resource
*
* @var resource
* @access public
*/
var $connection = null;
/**
* This boolean contains the current state of the CakeSocket class
*
* @var boolean
* @access public
*/
var $connected = false;
/**
* This variable contains an array with the last error number (num) and string (str)
*
* @var array
* @access public
*/
var $lastError = array();
/**
* Constructor.
*
* @param array $config Socket configuration, which will be merged with the base configuration
*/
function __construct($config = array()) {
parent::__construct();
$this->config = array_merge($this->_baseConfig, $config);
if (!is_numeric($this->config['protocol'])) {
$this->config['protocol'] = getprotobyname($this->config['protocol']);
}
}
/**
* Connect the socket to the given host and port.
*
* @return boolean Success
* @access public
*/
function connect() {
if ($this->connection != null) {
$this->disconnect();
}
$scheme = null;
if (isset($this->config['request']) && $this->config['request']['uri']['scheme'] == 'https') {
$scheme = 'ssl://';
}
if ($this->config['persistent'] == true) {
$tmp = null;
$this->connection = @pfsockopen($scheme.$this->config['host'], $this->config['port'], $errNum, $errStr, $this->config['timeout']);
} else {
$this->connection = @fsockopen($scheme.$this->config['host'], $this->config['port'], $errNum, $errStr, $this->config['timeout']);
}
if (!empty($errNum) || !empty($errStr)) {
$this->setLastError($errStr, $errNum);
}
$this->connected = is_resource($this->connection);
if ($this->connected) {
stream_set_timeout($this->connection, $this->config['timeout']);
}
return $this->connected;
}
/**
* Get the host name of the current connection.
*
* @return string Host name
* @access public
*/
function host() {
if (Validation::ip($this->config['host'])) {
return gethostbyaddr($this->config['host']);
} else {
return gethostbyaddr($this->address());
}
}
/**
* Get the IP address of the current connection.
*
* @return string IP address
* @access public
*/
function address() {
if (Validation::ip($this->config['host'])) {
return $this->config['host'];
} else {
return gethostbyname($this->config['host']);
}
}
/**
* Get all IP addresses associated with the current connection.
*
* @return array IP addresses
* @access public
*/
function addresses() {
if (Validation::ip($this->config['host'])) {
return array($this->config['host']);
} else {
return gethostbynamel($this->config['host']);
}
}
/**
* Get the last error as a string.
*
* @return string Last error
* @access public
*/
function lastError() {
if (!empty($this->lastError)) {
return $this->lastError['num'].': '.$this->lastError['str'];
} else {
return null;
}
}
/**
* Set the last error.
*
* @param integer $errNum Error code
* @param string $errStr Error string
* @access public
*/
function setLastError($errNum, $errStr) {
$this->lastError = array('num' => $errNum, 'str' => $errStr);
}
/**
* Write data to the socket.
*
* @param string $data The data to write to the socket
* @return boolean Success
* @access public
*/
function write($data) {
if (!$this->connected) {
if (!$this->connect()) {
return false;
}
}
return fwrite($this->connection, $data, strlen($data));
}
/**
* Read data from the socket. Returns false if no data is available or no connection could be
* established.
*
* @param integer $length Optional buffer length to read; defaults to 1024
* @return mixed Socket data
* @access public
*/
function read($length = 1024) {
if (!$this->connected) {
if (!$this->connect()) {
return false;
}
}
if (!feof($this->connection)) {
$buffer = fread($this->connection, $length);
$info = stream_get_meta_data($this->connection);
if ($info['timed_out']) {
$this->setLastError(E_WARNING, __('Connection timed out', true));
return false;
}
return $buffer;
} else {
return false;
}
}
/**
* Abort socket operation.
*
* @return boolean Success
* @access public
*/
function abort() {
}
/**
* Disconnect the socket from the current connection.
*
* @return boolean Success
* @access public
*/
function disconnect() {
if (!is_resource($this->connection)) {
$this->connected = false;
return true;
}
$this->connected = !fclose($this->connection);
if (!$this->connected) {
$this->connection = null;
}
return !$this->connected;
}
/**
* Destructor, used to disconnect from current connection.
*
* @access private
*/
function __destruct() {
$this->disconnect();
}
/**
* Resets the state of this Socket instance to it's initial state (before Object::__construct got executed)
*
* @return boolean True on success
* @access public
*/
function reset($state = null) {
if (empty($state)) {
static $initalState = array();
if (empty($initalState)) {
$initalState = get_class_vars(__CLASS__);
}
$state = $initalState;
}
foreach ($state as $property => $value) {
$this->{$property} = $value;
}
return true;
}
}
?>