Merged with latest commit

1 files changed, 140 insertions, 153 deletions

diff --git a/system/libraries/Session.php b/system/libraries/Session.php
index 08d2ba4ba..dd50a91e1 100644
--- a/system/libraries/Session.php
+++ b/system/libraries/Session.php
@@ -1,13 +1,13 @@
-<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * CodeIgniter
  *
  * An open source application development framework for PHP 5.1.6 or newer
  *
  * NOTICE OF LICENSE
- * 
+ *
  * Licensed under the Open Software License version 3.0
- * 
+ *
  * This source file is subject to the Open Software License (OSL 3.0) that is
  * bundled with this package in the files license.txt / license.rst.  It is
  * also available through the world wide web at this URL:
@@ -18,15 +18,13 @@
  *
  * @package		CodeIgniter
  * @author		EllisLab Dev Team
- * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc. (http://ellislab.com/)
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
  * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
  * @link		http://codeigniter.com
  * @since		Version 1.0
  * @filesource
  */
 
-// ------------------------------------------------------------------------
-
 /**
  * Session Class
  *
@@ -38,26 +36,26 @@
  */
 class CI_Session {
 
-	var $sess_encrypt_cookie		= FALSE;
-	var $sess_use_database			= FALSE;
-	var $sess_table_name			= '';
-	var $sess_expiration			= 7200;
-	var $sess_expire_on_close		= FALSE;
-	var $sess_match_ip				= FALSE;
-	var $sess_match_useragent		= TRUE;
-	var $sess_cookie_name			= 'ci_session';
-	var $cookie_prefix				= '';
-	var $cookie_path				= '';
-	var $cookie_domain				= '';
-	var $cookie_secure				= FALSE;
-	var $sess_time_to_update		= 300;
-	var $encryption_key				= '';
-	var $flashdata_key				= 'flash';
-	var $time_reference				= 'time';
-	var $gc_probability				= 5;
-	var $userdata					= array();
-	var $CI;
-	var $now;
+	public $sess_encrypt_cookie		= FALSE;
+	public $sess_use_database		= FALSE;
+	public $sess_table_name			= '';
+	public $sess_expiration			= 7200;
+	public $sess_expire_on_close		= FALSE;
+	public $sess_match_ip			= FALSE;
+	public $sess_match_useragent		= TRUE;
+	public $sess_cookie_name		= 'ci_session';
+	public $cookie_prefix			= '';
+	public $cookie_path			= '';
+	public $cookie_domain			= '';
+	public $cookie_secure			= FALSE;
+	public $sess_time_to_update		= 300;
+	public $encryption_key			= '';
+	public $flashdata_key			= 'flash';
+	public $time_reference			= 'time';
+	public $gc_probability			= 5;
+	public $userdata			= array();
+	public $CI;
+	public $now;
 
 	/**
 	 * Session Constructor
@@ -67,7 +65,7 @@ class CI_Session {
 	 */
 	public function __construct($params = array())
 	{
-		log_message('debug', "Session Class Initialized");
+		log_message('debug', 'Session Class Initialized');
 
 		// Set the super object to a local variable for use throughout the class
 		$this->CI =& get_instance();
@@ -93,14 +91,14 @@ class CI_Session {
 			$this->CI->load->library('encrypt');
 		}
 
-		// Are we using a database?  If so, load it
-		if ($this->sess_use_database === TRUE AND $this->sess_table_name != '')
+		// Are we using a database? If so, load it
+		if ($this->sess_use_database === TRUE && $this->sess_table_name != '')
 		{
 			$this->CI->load->database();
 		}
 
-		// Set the "now" time.  Can either be GMT or server time, based on the
-		// config prefs.  We use this to set the "last activity" time
+		// Set the "now" time. Can either be GMT or server time, based on the
+		// config prefs. We use this to set the "last activity" time
 		$this->now = $this->_get_time();
 
 		// Set the session length. If the session expiration is
@@ -109,12 +107,12 @@ class CI_Session {
 		{
 			$this->sess_expiration = (60*60*24*365*2);
 		}
-		
+
 		// Set the cookie name
 		$this->sess_cookie_name = $this->cookie_prefix.$this->sess_cookie_name;
 
 		// Run the Session routine. If a session doesn't exist we'll
-		// create a new one.  If it does, we'll update it.
+		// create a new one. If it does, we'll update it.
 		if ( ! $this->sess_read())
 		{
 			$this->sess_create();
@@ -133,7 +131,7 @@ class CI_Session {
 		// Delete expired sessions if necessary
 		$this->_sess_gc();
 
-		log_message('debug', "Session routines successfully run");
+		log_message('debug', 'Session routines successfully run');
 	}
 
 	// --------------------------------------------------------------------
@@ -141,10 +139,9 @@ class CI_Session {
 	/**
 	 * Fetch the current session data if it exists
 	 *
-	 * @access	public
 	 * @return	bool
 	 */
-	function sess_read()
+	public function sess_read()
 	{
 		// Fetch the cookie
 		$session = $this->CI->input->cookie($this->sess_cookie_name);
@@ -167,7 +164,7 @@ class CI_Session {
 			$hash	 = substr($session, strlen($session)-32); // get last 32 chars
 			$session = substr($session, 0, strlen($session)-32);
 
-			// Does the md5 hash match?  This is to prevent manipulation of session data in userspace
+			// Does the md5 hash match? This is to prevent manipulation of session data in userspace
 			if ($hash !==  md5($session.$this->encryption_key))
 			{
 				log_message('error', 'The session cookie data did not match what was expected. This could be a possible hacking attempt.');
@@ -180,7 +177,7 @@ class CI_Session {
 		$session = $this->_unserialize($session);
 
 		// Is the session data we unserialized an array with the correct format?
-		if ( ! is_array($session) OR ! isset($session['session_id']) OR ! isset($session['ip_address']) OR ! isset($session['user_agent']) OR ! isset($session['last_activity']))
+		if ( ! is_array($session) OR ! isset($session['session_id'], $session['ip_address'], $session['user_agent'], $session['last_activity']))
 		{
 			$this->sess_destroy();
 			return FALSE;
@@ -193,15 +190,15 @@ class CI_Session {
 			return FALSE;
 		}
 
-		// Does the IP Match?
-		if ($this->sess_match_ip == TRUE AND $session['ip_address'] != $this->CI->input->ip_address())
+		// Does the IP match?
+		if ($this->sess_match_ip == TRUE && $session['ip_address'] !== $this->CI->input->ip_address())
 		{
 			$this->sess_destroy();
 			return FALSE;
 		}
 
 		// Does the User Agent Match?
-		if ($this->sess_match_useragent == TRUE AND trim($session['user_agent']) != trim(substr($this->CI->input->user_agent(), 0, 120)))
+		if ($this->sess_match_useragent == TRUE && trim($session['user_agent']) !== trim(substr($this->CI->input->user_agent(), 0, 120)))
 		{
 			$this->sess_destroy();
 			return FALSE;
@@ -222,10 +219,10 @@ class CI_Session {
 				$this->CI->db->where('user_agent', $session['user_agent']);
 			}
 
-			$query = $this->CI->db->get($this->sess_table_name);
+			$query = $this->CI->db->limit(1)->get($this->sess_table_name);
 
-			// No result?  Kill it!
-			if ($query->num_rows() == 0)
+			// No result? Kill it!
+			if ($query->num_rows() === 0)
 			{
 				$this->sess_destroy();
 				return FALSE;
@@ -233,7 +230,7 @@ class CI_Session {
 
 			// Is there custom data?  If so, add it to the main session array
 			$row = $query->row();
-			if (isset($row->user_data) AND $row->user_data != '')
+			if (isset($row->user_data) && $row->user_data != '')
 			{
 				$custom_data = $this->_unserialize($row->user_data);
 
@@ -259,10 +256,9 @@ class CI_Session {
 	/**
 	 * Write the session data
 	 *
-	 * @access	public
 	 * @return	void
 	 */
-	function sess_write()
+	public function sess_write()
 	{
 		// Are we saving custom data to the DB?  If not, all we do is update the cookie
 		if ($this->sess_use_database === FALSE)
@@ -284,7 +280,7 @@ class CI_Session {
 			$cookie_userdata[$val] = $this->userdata[$val];
 		}
 
-		// Did we find any custom data?  If not, we turn the empty array into a string
+		// Did we find any custom data? If not, we turn the empty array into a string
 		// since there's no reason to serialize and store an empty array in the DB
 		if (count($custom_userdata) === 0)
 		{
@@ -300,7 +296,7 @@ class CI_Session {
 		$this->CI->db->where('session_id', $this->userdata['session_id']);
 		$this->CI->db->update($this->sess_table_name, array('last_activity' => $this->userdata['last_activity'], 'user_data' => $custom_userdata));
 
-		// Write the cookie.  Notice that we manually pass the cookie data array to the
+		// Write the cookie. Notice that we manually pass the cookie data array to the
 		// _set_cookie() function. Normally that function will store $this->userdata, but
 		// in this case that array contains custom data, which we do not want in the cookie.
 		$this->_set_cookie($cookie_userdata);
@@ -311,28 +307,27 @@ class CI_Session {
 	/**
 	 * Create a new session
 	 *
-	 * @access	public
 	 * @return	void
 	 */
-	function sess_create()
+	public function sess_create()
 	{
 		$sessid = '';
-		while (strlen($sessid) < 32)
+		do
 		{
 			$sessid .= mt_rand(0, mt_getrandmax());
 		}
+		while (strlen($sessid) < 32);
 
 		// To make the session ID even more secure we'll combine it with the user's IP
 		$sessid .= $this->CI->input->ip_address();
 
 		$this->userdata = array(
-							'session_id'	=> md5(uniqid($sessid, TRUE)),
-							'ip_address'	=> $this->CI->input->ip_address(),
-							'user_agent'	=> substr($this->CI->input->user_agent(), 0, 120),
-							'last_activity'	=> $this->now,
-							'user_data'		=> ''
-							);
-
+					'session_id'	=> md5(uniqid($sessid, TRUE)),
+					'ip_address'	=> $this->CI->input->ip_address(),
+					'user_agent'	=> substr($this->CI->input->user_agent(), 0, 120),
+					'last_activity'	=> $this->now,
+					'user_data'	=> ''
+				);
 
 		// Save the data to the DB if needed
 		if ($this->sess_use_database === TRUE)
@@ -349,10 +344,9 @@ class CI_Session {
 	/**
 	 * Update an existing session
 	 *
-	 * @access	public
 	 * @return	void
 	 */
-	function sess_update()
+	public function sess_update()
 	{
 		// We only update the session every five minutes by default
 		if (($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)
@@ -360,29 +354,52 @@ class CI_Session {
 			return;
 		}
 
+		// _set_cookie() will handle this for us if we aren't using database sessions
+		// by pushing all userdata to the cookie.
+		$cookie_data = NULL;
+
+		/* Changing the session ID during an AJAX call causes problems,
+		 * so we'll only update our last_activity
+		 */
+		if ($this->CI->input->is_ajax_request())
+		{
+			$this->userdata['last_activity'] = $this->now;
+
+			// Update the session ID and last_activity field in the DB if needed
+			if ($this->sess_use_database === TRUE)
+			{
+				// set cookie explicitly to only have our session data
+				$cookie_data = array();
+				foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
+				{
+					$cookie_data[$val] = $this->userdata[$val];
+				}
+
+				$this->CI->db->query($this->CI->db->update_string($this->sess_table_name,
+											array('last_activity' => $this->userdata['last_activity']),
+											array('session_id' => $this->userdata['session_id'])));
+			}
+
+			return $this->_set_cookie($cookie_data);
+		}
+
 		// Save the old session id so we know which record to
 		// update in the database if we need it
 		$old_sessid = $this->userdata['session_id'];
 		$new_sessid = '';
-		while (strlen($new_sessid) < 32)
+		do
 		{
 			$new_sessid .= mt_rand(0, mt_getrandmax());
 		}
+		while (strlen($new_sessid) < 32);
 
 		// To make the session ID even more secure we'll combine it with the user's IP
 		$new_sessid .= $this->CI->input->ip_address();
 
-		// Turn it into a hash
-		$new_sessid = md5(uniqid($new_sessid, TRUE));
-
-		// Update the session data in the session data array
-		$this->userdata['session_id'] = $new_sessid;
+		// Turn it into a hash and update the session data array
+		$this->userdata['session_id'] = $new_sessid = md5(uniqid($new_sessid, TRUE));
 		$this->userdata['last_activity'] = $this->now;
 
-		// _set_cookie() will handle this for us if we aren't using database sessions
-		// by pushing all userdata to the cookie.
-		$cookie_data = NULL;
-
 		// Update the session ID and last_activity field in the DB if needed
 		if ($this->sess_use_database === TRUE)
 		{
@@ -405,13 +422,12 @@ class CI_Session {
 	/**
 	 * Destroy the current session
 	 *
-	 * @access	public
 	 * @return	void
 	 */
-	function sess_destroy()
+	public function sess_destroy()
 	{
 		// Kill the session DB row
-		if ($this->sess_use_database === TRUE AND isset($this->userdata['session_id']))
+		if ($this->sess_use_database === TRUE && isset($this->userdata['session_id']))
 		{
 			$this->CI->db->where('session_id', $this->userdata['session_id']);
 			$this->CI->db->delete($this->sess_table_name);
@@ -419,13 +435,13 @@ class CI_Session {
 
 		// Kill the cookie
 		setcookie(
-					$this->sess_cookie_name,
-					addslashes(serialize(array())),
-					($this->now - 31500000),
-					$this->cookie_path,
-					$this->cookie_domain,
-					0
-				);
+				$this->sess_cookie_name,
+				addslashes(serialize(array())),
+				($this->now - 31500000),
+				$this->cookie_path,
+				$this->cookie_domain,
+				0
+			);
 	}
 
 	// --------------------------------------------------------------------
@@ -433,11 +449,10 @@ class CI_Session {
 	/**
 	 * Fetch a specific item from the session array
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
-	function userdata($item)
+	public function userdata($item)
 	{
 		return ( ! isset($this->userdata[$item])) ? FALSE : $this->userdata[$item];
 	}
@@ -447,10 +462,9 @@ class CI_Session {
 	/**
 	 * Fetch all session data
 	 *
-	 * @access	public
 	 * @return	array
 	 */
-	function all_userdata()
+	public function all_userdata()
 	{
 		return $this->userdata;
 	}
@@ -460,12 +474,11 @@ class CI_Session {
 	/**
 	 * Add or change data in the "userdata" array
 	 *
-	 * @access	public
 	 * @param	mixed
 	 * @param	string
 	 * @return	void
 	 */
-	function set_userdata($newdata = array(), $newval = '')
+	public function set_userdata($newdata = array(), $newval = '')
 	{
 		if (is_string($newdata))
 		{
@@ -488,10 +501,9 @@ class CI_Session {
 	/**
 	 * Delete a session variable from the "userdata" array
 	 *
-	 * @access	array
 	 * @return	void
 	 */
-	function unset_userdata($newdata = array())
+	public function unset_userdata($newdata = array())
 	{
 		if (is_string($newdata))
 		{
@@ -515,12 +527,11 @@ class CI_Session {
 	 * Add or change flashdata, only available
 	 * until the next request
 	 *
-	 * @access	public
 	 * @param	mixed
 	 * @param	string
 	 * @return	void
 	 */
-	function set_flashdata($newdata = array(), $newval = '')
+	public function set_flashdata($newdata = array(), $newval = '')
 	{
 		if (is_string($newdata))
 		{
@@ -531,8 +542,7 @@ class CI_Session {
 		{
 			foreach ($newdata as $key => $val)
 			{
-				$flashdata_key = $this->flashdata_key.':new:'.$key;
-				$this->set_userdata($flashdata_key, $val);
+				$this->set_userdata($this->flashdata_key.':new:'.$key, $val);
 			}
 		}
 	}
@@ -542,21 +552,18 @@ class CI_Session {
 	/**
 	 * Keeps existing flashdata available to next request.
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	void
 	 */
-	function keep_flashdata($key)
+	public function keep_flashdata($key)
 	{
-		// 'old' flashdata gets removed.  Here we mark all
+		// 'old' flashdata gets removed. Here we mark all
 		// flashdata as 'new' to preserve it from _flashdata_sweep()
 		// Note the function will return FALSE if the $key
 		// provided cannot be found
-		$old_flashdata_key = $this->flashdata_key.':old:'.$key;
-		$value = $this->userdata($old_flashdata_key);
+		$value = $this->userdata($this->flashdata_key.':old:'.$key);
 
-		$new_flashdata_key = $this->flashdata_key.':new:'.$key;
-		$this->set_userdata($new_flashdata_key, $value);
+		$this->set_userdata($this->flashdata_key.':new:'.$key, $value);
 	}
 
 	// ------------------------------------------------------------------------
@@ -564,14 +571,12 @@ class CI_Session {
 	/**
 	 * Fetch a specific flashdata item from the session array
 	 *
-	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
-	function flashdata($key)
+	public function flashdata($key)
 	{
-		$flashdata_key = $this->flashdata_key.':old:'.$key;
-		return $this->userdata($flashdata_key);
+		return $this->userdata($this->flashdata_key.':old:'.$key);
 	}
 
 	// ------------------------------------------------------------------------
@@ -580,10 +585,9 @@ class CI_Session {
 	 * Identifies flashdata as 'old' for removal
 	 * when _flashdata_sweep() runs.
 	 *
-	 * @access	private
 	 * @return	void
 	 */
-	function _flashdata_mark()
+	protected function _flashdata_mark()
 	{
 		$userdata = $this->all_userdata();
 		foreach ($userdata as $name => $value)
@@ -591,8 +595,7 @@ class CI_Session {
 			$parts = explode(':new:', $name);
 			if (is_array($parts) && count($parts) === 2)
 			{
-				$new_name = $this->flashdata_key.':old:'.$parts[1];
-				$this->set_userdata($new_name, $value);
+				$this->set_userdata($this->flashdata_key.':old:'.$parts[1], $value);
 				$this->unset_userdata($name);
 			}
 		}
@@ -603,11 +606,9 @@ class CI_Session {
 	/**
 	 * Removes all flashdata marked as 'old'
 	 *
-	 * @access	private
 	 * @return	void
 	 */
-
-	function _flashdata_sweep()
+	protected function _flashdata_sweep()
 	{
 		$userdata = $this->all_userdata();
 		foreach ($userdata as $key => $value)
@@ -625,22 +626,13 @@ class CI_Session {
 	/**
 	 * Get the "now" time
 	 *
-	 * @access	private
 	 * @return	string
 	 */
-	function _get_time()
+	protected function _get_time()
 	{
-		if (strtolower($this->time_reference) == 'gmt')
-		{
-			$now = time();
-			$time = mktime(gmdate("H", $now), gmdate("i", $now), gmdate("s", $now), gmdate("m", $now), gmdate("d", $now), gmdate("Y", $now));
-		}
-		else
-		{
-			$time = time();
-		}
-
-		return $time;
+		return (strtolower($this->time_reference) === 'gmt')
+			? mktime(gmdate('H'), gmdate('i'), gmdate('s'), gmdate('m'), gmdate('d'), gmdate('Y'))
+			: time();
 	}
 
 	// --------------------------------------------------------------------
@@ -648,10 +640,9 @@ class CI_Session {
 	/**
 	 * Write the session cookie
 	 *
-	 * @access	public
 	 * @return	void
 	 */
-	function _set_cookie($cookie_data = NULL)
+	protected function _set_cookie($cookie_data = NULL)
 	{
 		if (is_null($cookie_data))
 		{
@@ -675,13 +666,13 @@ class CI_Session {
 
 		// Set the cookie
 		setcookie(
-					$this->sess_cookie_name,
-					$cookie_data,
-					$expire,
-					$this->cookie_path,
-					$this->cookie_domain,
-					$this->cookie_secure
-				);
+				$this->sess_cookie_name,
+				$cookie_data,
+				$expire,
+				$this->cookie_path,
+				$this->cookie_domain,
+				$this->cookie_secure
+			);
 	}
 
 	// --------------------------------------------------------------------
@@ -692,34 +683,32 @@ class CI_Session {
 	 * This function first converts any slashes found in the array to a temporary
 	 * marker, so when it gets unserialized the slashes will be preserved
 	 *
-	 * @access	private
 	 * @param	array
 	 * @return	string
 	 */
-	function _serialize($data)
+	protected function _serialize($data)
 	{
 		if (is_array($data))
 		{
 			array_walk_recursive($data, array(&$this, '_escape_slashes'));
 		}
-		else
+		elseif (is_string($data))
 		{
-			if (is_string($data))
-			{
-				$data = str_replace('\\', '{{slash}}', $data);
-			}
+			$data = str_replace('\\', '{{slash}}', $data);
 		}
 		return serialize($data);
 	}
-	
+
 	/**
 	 * Escape slashes
 	 *
 	 * This function converts any slashes found into a temporary marker
 	 *
-	 * @access	private
+	 * @param	string
+	 * @param	string
+	 * @return	void
 	 */
-	function _escape_slashes(&$val, $key)
+	protected function _escape_slashes(&$val, $key)
 	{
 		if (is_string($val))
 		{
@@ -735,11 +724,10 @@ class CI_Session {
 	 * This function unserializes a data string, then converts any
 	 * temporary slash markers back to actual slashes
 	 *
-	 * @access	private
 	 * @param	array
 	 * @return	string
 	 */
-	function _unserialize($data)
+	protected function _unserialize($data)
 	{
 		$data = @unserialize(strip_slashes($data));
 
@@ -751,15 +739,17 @@ class CI_Session {
 
 		return (is_string($data)) ? str_replace('{{slash}}', '\\', $data) : $data;
 	}
-	
+
 	/**
 	 * Unescape slashes
 	 *
 	 * This function converts any slash markers back into actual slashes
 	 *
-	 * @access	private
+	 * @param	string
+	 * @param	string
+	 * @return	void
 	 */
-	function _unescape_slashes(&$val, $key)
+	protected function _unescape_slashes(&$val, $key)
 	{
 		if (is_string($val))
 		{
@@ -775,10 +765,9 @@ class CI_Session {
 	 * This deletes expired session rows from database
 	 * if the probability percentage is met
 	 *
-	 * @access	public
 	 * @return	void
 	 */
-	function _sess_gc()
+	protected function _sess_gc()
 	{
 		if ($this->sess_use_database != TRUE)
 		{
@@ -797,9 +786,7 @@ class CI_Session {
 		}
 	}
 
-
 }
-// END Session Class
 
 /* End of file Session.php */
-/* Location: ./system/libraries/Session.php */
\ No newline at end of file
+/* Location: ./system/libraries/Session.php */