Added Session driver with native PHP sessions and original-flavor CI cookie sessions
diff --git a/system/libraries/Session/drivers/Session_native.php b/system/libraries/Session/drivers/Session_native.php
new file mode 100755
index 0000000..df58817
--- /dev/null
+++ b/system/libraries/Session/drivers/Session_native.php
@@ -0,0 +1,190 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.1.6 or newer
+ *
+ * @package CodeIgniter
+ * @author ExpressionEngine Dev Team
+ * @copyright Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license http://codeigniter.com/user_guide/license.html
+ * @link http://codeigniter.com
+ * @since Version 2.0
+ * @filesource
+ */
+
+
+/**
+ * Native PHP session management driver
+ *
+ * This is the driver that uses the native PHP $_SESSION array through the Session driver library.
+ *
+ * @package CodeIgniter
+ * @subpackage Libraries
+ * @category Sessions
+ * @author Darren Hill (DChill)
+ */
+class Session_Native extends SessionDriver {
+ /**
+ * Initialize session driver object
+ *
+ * @access protected
+ * @return void
+ */
+ protected function initialize()
+ {
+ // Get config parameters
+ $config = array();
+ $CI =& get_instance();
+ foreach (array('sess_cookie_name', 'sess_expire_on_close', 'sess_expiration', 'sess_match_ip',
+ 'sess_match_useragent', 'cookie_prefix', 'cookie_path', 'cookie_domain') as $key)
+ {
+ $config[$key] = isset($this->parent->params[$key]) ? $this->parent->params[$key] : $CI->config->item($key);
+ }
+
+ // Set session name, if specified
+ if ($config['sess_cookie_name'])
+ {
+ $name = $config['sess_cookie_name'];
+ if ($config['cookie_prefix'])
+ {
+ // Prepend cookie prefix
+ $name = $config['cookie_prefix'].$name;
+ }
+ session_name($name);
+ }
+
+ // Set expiration, path, and domain
+ $expire = 7200;
+ $path = '/';
+ $domain = '';
+ if ($config['sess_expiration'] !== FALSE)
+ {
+ // Default to 2 years if expiration is "0"
+ $expire = ($config['sess_expiration'] == 0) ? (60*60*24*365*2) : $config['sess_expiration'];
+ }
+ if ($config['cookie_path'])
+ {
+ // Use specified path
+ $path = $config['cookie_path'];
+ }
+ if ($config['cookie_domain'])
+ {
+ // Use specified domain
+ $domain = $config['cookie_domain'];
+ }
+ session_set_cookie_params($config['sess_expire_on_close'] ? 0 : $expire, $path, $domain);
+
+ // Start session
+ session_start();
+
+ // Check session expiration, ip, and agent
+ $now = time();
+ $destroy = FALSE;
+ if (isset($_SESSION['last_activity']) && ($_SESSION['last_activity'] + $expire) < $now)
+ {
+ // Expired - destroy
+ $destroy = TRUE;
+ }
+ else if ($config['sess_match_ip'] == TRUE && isset($_SESSION['ip_address']) &&
+ $_SESSION['ip_address'] != $CI->input->ip_address())
+ {
+ // IP doesn't match - destroy
+ $destroy = TRUE;
+ }
+ else if ($config['sess_match_useragent'] == TRUE && isset($_SESSION['user_agent']) &&
+ $_SESSION['user_agent'] != trim(substr($CI->input->user_agent(), 0, 50)))
+ {
+ // Agent doesn't match - destroy
+ $destroy = TRUE;
+ }
+
+ // Destroy expired or invalid session
+ if ($destroy)
+ {
+ // Clear old session and start new
+ $this->sess_destroy();
+ session_start();
+ }
+
+ // Set activity time
+ $_SESSION['last_activity'] = $now;
+
+ // Set matching values as required
+ if ($config['sess_match_ip'] == TRUE && !isset($_SESSION['ip_address']))
+ {
+ // Store user IP address
+ $_SESSION['ip_address'] = $CI->input->ip_address();
+ }
+ if ($config['sess_match_useragent'] == TRUE && !isset($_SESSION['user_agent']))
+ {
+ // Store user agent string
+ $_SESSION['user_agent'] = trim(substr($CI->input->user_agent(), 0, 50));
+ }
+ }
+
+ /**
+ * Save the session data
+ *
+ * @access public
+ * @return void
+ */
+ public function sess_save()
+ {
+ // Nothing to do - changes to $_SESSION are automatically saved
+ }
+
+ /**
+ * Destroy the current session
+ *
+ * @access public
+ * @return void
+ */
+ public function sess_destroy()
+ {
+ // Cleanup session
+ $_SESSION = array();
+ $name = session_name();
+ if (isset($_COOKIE[$name]))
+ {
+ // Clear session cookie
+ $params = session_get_cookie_params();
+ setcookie($name, '', time() - 42000, $params['path'], $params['domain']);
+ unset($_COOKIE[$name]);
+ }
+ session_destroy();
+ }
+
+ /**
+ * Regenerate the current session
+ *
+ * Regenerate the session id
+ *
+ * @access public
+ * @param boolean Destroy session data flag (default: false)
+ * @return void
+ */
+ public function sess_regenerate($destroy = false)
+ {
+ // Just regenerate id, passing destroy flag
+ session_regenerate_id($destroy);
+ }
+
+ /**
+ * Get a reference to user data array
+ *
+ * @access public
+ * @return array Reference to userdata
+ */
+ public function &get_userdata()
+ {
+ // Just return reference to $_SESSION
+ return $_SESSION;
+ }
+}
+// END Session_Native Class
+
+
+/* End of file Session_native.php */
+/* Location: ./system/libraries/Session/Session.php */
+?>