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Merge branch 'develop' of github.com:/EllisLab/CodeIgniter into hmvc-…

…lite
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commit ee9e5cb81536cac8ad1b961a45bfa80c1edf3692 2 parents c369500 + 1e40c21
Darren Hill authored
32 system/core/Loader.php
View
@@ -821,13 +821,7 @@ public function driver($library = '', $params = NULL, $object_name = NULL)
{
$this->driver($driver);
}
- return FALSE;
- }
-
- if ( ! class_exists('CI_Driver_Library'))
- {
- // We aren't instantiating an object here, that'll be done by the Library itself
- require BASEPATH.'libraries/Driver.php';
+ return;
}
if ($library === '')
@@ -1152,6 +1146,13 @@ protected function _ci_load_class($class, $params = NULL, $object_name = NULL)
// Get the filename from the path
$class = substr($class, $last_slash);
+
+ // Check for match and driver base class
+ if (strtolower(trim($subdir, '/')) == strtolower($class) && ! class_exists('CI_Driver_Library'))
+ {
+ // We aren't instantiating an object here, just making the base class available
+ require BASEPATH.'libraries/Driver.php';
+ }
}
// We'll test for both lowercase and capitalized versions of the file name
@@ -1249,7 +1250,13 @@ protected function _ci_load_class($class, $params = NULL, $object_name = NULL)
if ($subdir === '')
{
$path = strtolower($class).'/'.$class;
- return $this->_ci_load_class($path, $params);
+ return $this->_ci_load_class($path, $params, $object_name);
+ }
+ else if (ucfirst($subdir) != $subdir)
+ {
+ // Lowercase subdir failed - retry capitalized
+ $path = ucfirst($subdir).$class;
+ return $this->_ci_load_class($path, $params, $object_name);
}
// If we got this far we were unable to find the requested class.
@@ -1414,6 +1421,15 @@ public function ci_autoloader()
}
}
+ // Autoload drivers
+ if (isset($autoload['drivers']))
+ {
+ foreach ($autoload['drivers'] as $item)
+ {
+ $this->driver($item);
+ }
+ }
+
// Autoload models
if (isset($this->_ci_autoload['model']))
{
20 system/libraries/Driver.php
View
@@ -53,13 +53,29 @@ class CI_Driver_Library {
protected $lib_name;
/**
+ * Get magic method
+ *
* The first time a child is used it won't exist, so we instantiate it
* subsequents calls will go straight to the proper child.
*
- * @param mixed $child
- * @return mixed
+ * @param string Child class name
+ * @return object Child class
*/
public function __get($child)
+ {
+ // Try to load the driver
+ return $this->load_driver($child);
+ }
+
+ /**
+ * Load driver
+ *
+ * Separate load_driver call to support explicit driver load by library or user
+ *
+ * @param string Child class name
+ * @return object Child class
+ */
+ public function load_driver($child)
{
return $this->load_driver($child);
}
955 system/libraries/Session.php
View
@@ -1,955 +0,0 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-/**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.2.4 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:
- * http://opensource.org/licenses/OSL-3.0
- * If you did not receive a copy of the license and are unable to obtain it
- * through the world wide web, please send an email to
- * licensing@ellislab.com so we can send you a copy immediately.
- *
- * @package CodeIgniter
- * @author EllisLab Dev Team
- * @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
- *
- * @package CodeIgniter
- * @subpackage Libraries
- * @category Sessions
- * @author EllisLab Dev Team
- * @link http://codeigniter.com/user_guide/libraries/sessions.html
- */
-class CI_Session {
-
- /**
- * Whether to encrypt the session cookie
- *
- * @var bool
- */
- public $sess_encrypt_cookie = FALSE;
-
- /**
- * Whether to use to the database for session storage
- *
- * @var bool
- */
- public $sess_use_database = FALSE;
-
- /**
- * Name of the database table in which to store sessions
- *
- * @var string
- */
- public $sess_table_name = '';
-
- /**
- * Length of time (in seconds) for sessions to expire
- *
- * @var int
- */
- public $sess_expiration = 7200;
-
- /**
- * Whether to kill session on close of browser window
- *
- * @var bool
- */
- public $sess_expire_on_close = FALSE;
-
- /**
- * Whether to match session on ip address
- *
- * @var bool
- */
- public $sess_match_ip = FALSE;
-
- /**
- * Whether to match session on user-agent
- *
- * @var bool
- */
- public $sess_match_useragent = TRUE;
-
- /**
- * Name of session cookie
- *
- * @var string
- */
- public $sess_cookie_name = 'ci_session';
-
- /**
- * Session cookie prefix
- *
- * @var string
- */
- public $cookie_prefix = '';
-
- /**
- * Session cookie path
- *
- * @var string
- */
- public $cookie_path = '';
-
- /**
- * Session cookie domain
- *
- * @var string
- */
- public $cookie_domain = '';
-
- /**
- * Whether to set the cookie only on HTTPS connections
- *
- * @var bool
- */
- public $cookie_secure = FALSE;
-
- /**
- * Whether cookie should be allowed only to be sent by the server
- *
- * @var bool
- */
- public $cookie_httponly = FALSE;
-
- /**
- * Interval at which to update session
- *
- * @var int
- */
- public $sess_time_to_update = 300;
-
- /**
- * Key with which to encrypt the session cookie
- *
- * @var string
- */
- public $encryption_key = '';
-
- /**
- * String to indicate flash data cookies
- *
- * @var string
- */
- public $flashdata_key = 'flash';
-
- /**
- * Timezone to use for the current time
- *
- * @var string
- */
- public $time_reference = 'local';
-
-
- /**
- * Session data
- *
- * @var array
- */
- public $userdata = array();
-
- /**
- * Reference to CodeIgniter instance
- *
- * @var object
- */
- public $CI;
-
- /**
- * Current time
- *
- * @var int
- */
- public $now;
-
- /**
- * Session Constructor
- *
- * The constructor runs the session routines automatically
- * whenever the class is instantiated.
- *
- * @param array
- * @return void
- */
- public function __construct($params = array())
- {
- log_message('debug', 'Session Class Initialized');
-
- // Set the super object to a local variable for use throughout the class
- $this->CI =& get_instance();
-
- // Set all the session preferences, which can either be set
- // manually via the $params array above or via the config file
- foreach (array('sess_encrypt_cookie', 'sess_use_database', 'sess_table_name', 'sess_expiration', 'sess_expire_on_close', 'sess_match_ip', 'sess_match_useragent', 'sess_cookie_name', 'cookie_path', 'cookie_domain', 'cookie_secure', 'cookie_httponly', 'sess_time_to_update', 'time_reference', 'cookie_prefix', 'encryption_key') as $key)
- {
- $this->$key = isset($params[$key]) ? $params[$key] : $this->CI->config->item($key);
- }
-
- if ($this->encryption_key === '')
- {
- show_error('In order to use the Session class you are required to set an encryption key in your config file.');
- }
-
- // Load the string helper so we can use the strip_slashes() function
- $this->CI->load->helper('string');
-
- // Do we need encryption? If so, load the encryption class
- if ($this->sess_encrypt_cookie === TRUE)
- {
- $this->CI->load->library('encrypt');
- }
-
- // Are we using a database? If so, load it
- if ($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
- $this->now = $this->_get_time();
-
- // Set the session length. If the session expiration is
- // set to zero we'll set the expiration two years from now.
- if ($this->sess_expiration === 0)
- {
- $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.
- if ( ! $this->sess_read())
- {
- $this->sess_create();
- }
- else
- {
- $this->sess_update();
- }
-
- // Delete 'old' flashdata (from last request)
- $this->_flashdata_sweep();
-
- // Mark all new flashdata as old (data will be deleted before next request)
- $this->_flashdata_mark();
-
- // Delete expired sessions if necessary
- $this->_sess_gc();
-
- log_message('debug', 'Session routines successfully run');
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Fetch the current session data if it exists
- *
- * @return bool
- */
- public function sess_read()
- {
- // Fetch the cookie
- $session = $this->CI->input->cookie($this->sess_cookie_name);
-
- // No cookie? Goodbye cruel world!...
- if ($session === NULL)
- {
- log_message('debug', 'A session cookie was not found.');
- return FALSE;
- }
-
- // Decrypt the cookie data
- if ($this->sess_encrypt_cookie === TRUE)
- {
- $session = $this->CI->encrypt->decode($session);
- }
- else
- {
- // encryption was not used, so we need to check the md5 hash
- $hash = substr($session, strlen($session)-32); // get last 32 chars
- $session = substr($session, 0, strlen($session)-32);
-
- // Does the md5 hash match? This is to prevent manipulation of session data in userspace
- if ($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.');
- $this->sess_destroy();
- return FALSE;
- }
- }
-
- // Unserialize the session array
- $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'], $session['ip_address'], $session['user_agent'], $session['last_activity']))
- {
- $this->sess_destroy();
- return FALSE;
- }
-
- // Is the session current?
- if (($session['last_activity'] + $this->sess_expiration) < $this->now)
- {
- $this->sess_destroy();
- return FALSE;
- }
-
- // Does the IP match?
- if ($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 && trim($session['user_agent']) !== trim(substr($this->CI->input->user_agent(), 0, 120)))
- {
- $this->sess_destroy();
- return FALSE;
- }
-
- // Is there a corresponding session in the DB?
- if ($this->sess_use_database === TRUE)
- {
- $this->CI->db->where('session_id', $session['session_id']);
-
- if ($this->sess_match_ip === TRUE)
- {
- $this->CI->db->where('ip_address', $session['ip_address']);
- }
-
- if ($this->sess_match_useragent === TRUE)
- {
- $this->CI->db->where('user_agent', $session['user_agent']);
- }
-
- $query = $this->CI->db->limit(1)->get($this->sess_table_name);
-
- // No result? Kill it!
- if ($query->num_rows() === 0)
- {
- $this->sess_destroy();
- return FALSE;
- }
-
- // Is there custom data? If so, add it to the main session array
- $row = $query->row();
- if ( ! empty($row->user_data))
- {
- $custom_data = $this->_unserialize($row->user_data);
-
- if (is_array($custom_data))
- {
- foreach ($custom_data as $key => $val)
- {
- $session[$key] = $val;
- }
- }
- }
- }
-
- // Session is valid!
- $this->userdata = $session;
- unset($session);
-
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Write the session data
- *
- * @return void
- */
- 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)
- {
- $this->_set_cookie();
- return;
- }
-
- // set the custom userdata, the session data we will set in a second
- $custom_userdata = $this->userdata;
- $cookie_userdata = array();
-
- // Before continuing, we need to determine if there is any custom data to deal with.
- // Let's determine this by removing the default indexes to see if there's anything left in the array
- // and set the session data while we're at it
- foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
- {
- unset($custom_userdata[$val]);
- $cookie_userdata[$val] = $this->userdata[$val];
- }
-
- // 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)
- {
- $custom_userdata = '';
- }
- else
- {
- // Serialize the custom data array so we can store it
- $custom_userdata = $this->_serialize($custom_userdata);
- }
-
- // Run the update query
- $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
- // _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);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Create a new session
- *
- * @return void
- */
- public function sess_create()
- {
- $sessid = '';
- 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' => $this->now,
- 'user_data' => ''
- );
-
- // Save the data to the DB if needed
- if ($this->sess_use_database === TRUE)
- {
- $this->CI->db->query($this->CI->db->insert_string($this->sess_table_name, $this->userdata));
- }
-
- // Write the cookie
- $this->_set_cookie();
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Update an existing session
- *
- * @return void
- */
- public function sess_update()
- {
- // We only update the session every five minutes by default
- if (($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)
- {
- 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 = '';
- 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 and update the session data array
- $this->userdata['session_id'] = $new_sessid = md5(uniqid($new_sessid, TRUE));
- $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->now, 'session_id' => $new_sessid), array('session_id' => $old_sessid)));
- }
-
- // Write the cookie
- $this->_set_cookie($cookie_data);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Destroy the current session
- *
- * @return void
- */
- public function sess_destroy()
- {
- // Kill the session DB row
- 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);
- }
-
- // Kill the cookie
- setcookie(
- $this->sess_cookie_name,
- addslashes(serialize(array())),
- ($this->now - 31500000),
- $this->cookie_path,
- $this->cookie_domain,
- 0
- );
-
- // Kill session data
- $this->userdata = array();
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Fetch a specific item from the session array
- *
- * @param string
- * @return string
- */
- public function userdata($item)
- {
- return isset($this->userdata[$item]) ? $this->userdata[$item] : NULL;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Fetch all session data
- *
- * @return array
- */
- public function all_userdata()
- {
- return $this->userdata;
- }
-
- // --------------------------------------------------------------------------
-
- /**
- * Fetch all flashdata
- *
- * @return array
- */
- public function all_flashdata()
- {
- $out = array();
-
- // loop through all userdata
- foreach ($this->all_userdata() as $key => $val)
- {
- // if it contains flashdata, add it
- if (strpos($key, 'flash:old:') !== FALSE)
- {
- $out[$key] = $val;
- }
- }
- return $out;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Add or change data in the "userdata" array
- *
- * @param mixed
- * @param string
- * @return void
- */
- public function set_userdata($newdata = array(), $newval = '')
- {
- if (is_string($newdata))
- {
- $newdata = array($newdata => $newval);
- }
-
- if (count($newdata) > 0)
- {
- foreach ($newdata as $key => $val)
- {
- $this->userdata[$key] = $val;
- }
- }
-
- $this->sess_write();
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Delete a session variable from the "userdata" array
- *
- * @param array
- * @return void
- */
- public function unset_userdata($newdata = array())
- {
- if (is_string($newdata))
- {
- $newdata = array($newdata => '');
- }
-
- if (count($newdata) > 0)
- {
- foreach ($newdata as $key => $val)
- {
- unset($this->userdata[$key]);
- }
- }
-
- $this->sess_write();
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Add or change flashdata, only available
- * until the next request
- *
- * @param mixed
- * @param string
- * @return void
- */
- public function set_flashdata($newdata = array(), $newval = '')
- {
- if (is_string($newdata))
- {
- $newdata = array($newdata => $newval);
- }
-
- if (count($newdata) > 0)
- {
- foreach ($newdata as $key => $val)
- {
- $this->set_userdata($this->flashdata_key.':new:'.$key, $val);
- }
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Keeps existing flashdata available to next request.
- *
- * @param string
- * @return void
- */
- public function keep_flashdata($key)
- {
- // 'old' flashdata gets removed. Here we mark all
- // flashdata as 'new' to preserve it from _flashdata_sweep()
- // Note the function will return NULL if the $key
- // provided cannot be found
- $value = $this->userdata($this->flashdata_key.':old:'.$key);
-
- $this->set_userdata($this->flashdata_key.':new:'.$key, $value);
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Fetch a specific flashdata item from the session array
- *
- * @param string
- * @return string
- */
- public function flashdata($key)
- {
- return $this->userdata($this->flashdata_key.':old:'.$key);
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Identifies flashdata as 'old' for removal
- * when _flashdata_sweep() runs.
- *
- * @return void
- */
- protected function _flashdata_mark()
- {
- $userdata = $this->all_userdata();
- foreach ($userdata as $name => $value)
- {
- $parts = explode(':new:', $name);
- if (is_array($parts) && count($parts) === 2)
- {
- $this->set_userdata($this->flashdata_key.':old:'.$parts[1], $value);
- $this->unset_userdata($name);
- }
- }
- }
-
- // ------------------------------------------------------------------------
-
- /**
- * Removes all flashdata marked as 'old'
- *
- * @return void
- */
- protected function _flashdata_sweep()
- {
- $userdata = $this->all_userdata();
- foreach ($userdata as $key => $value)
- {
- if (strpos($key, ':old:'))
- {
- $this->unset_userdata($key);
- }
- }
-
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Get the "now" time
- *
- * @return string
- */
- protected function _get_time()
- {
- if ($this->time_reference === 'local' OR $this->time_reference === date_default_timezone_get())
- {
- return time();
- }
-
- $datetime = new DateTime('now', new DateTimeZone($this->time_reference));
- sscanf($datetime->format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second);
-
- return mktime($hour, $minute, $second, $month, $day, $year);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Write the session cookie
- *
- * @param mixed
- * @return void
- */
- protected function _set_cookie($cookie_data = NULL)
- {
- if (is_null($cookie_data))
- {
- $cookie_data = $this->userdata;
- }
-
- // Serialize the userdata for the cookie
- $cookie_data = $this->_serialize($cookie_data);
-
- if ($this->sess_encrypt_cookie === TRUE)
- {
- $cookie_data = $this->CI->encrypt->encode($cookie_data);
- }
- else
- {
- // if encryption is not used, we provide an md5 hash to prevent userside tampering
- $cookie_data = $cookie_data.md5($cookie_data.$this->encryption_key);
- }
-
- $expire = ($this->sess_expire_on_close === TRUE) ? 0 : $this->sess_expiration + time();
-
- // Set the cookie
- setcookie(
- $this->sess_cookie_name,
- $cookie_data,
- $expire,
- $this->cookie_path,
- $this->cookie_domain,
- $this->cookie_secure,
- $this->cookie_httponly
- );
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Serialize an array
- *
- * This function first converts any slashes found in the array to a temporary
- * marker, so when it gets unserialized the slashes will be preserved
- *
- * @param array
- * @return string
- */
- protected function _serialize($data)
- {
- if (is_array($data))
- {
- array_walk_recursive($data, array(&$this, '_escape_slashes'));
- }
- elseif (is_string($data))
- {
- $data = str_replace('\\', '{{slash}}', $data);
- }
- return serialize($data);
- }
-
- /**
- * Escape slashes
- *
- * This function converts any slashes found into a temporary marker
- *
- * @param string
- * @param string
- * @return void
- */
- protected function _escape_slashes(&$val, $key)
- {
- if (is_string($val))
- {
- $val = str_replace('\\', '{{slash}}', $val);
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Unserialize
- *
- * This function unserializes a data string, then converts any
- * temporary slash markers back to actual slashes
- *
- * @param array
- * @return string
- */
- protected function _unserialize($data)
- {
- $data = @unserialize(strip_slashes(trim($data)));
-
- if (is_array($data))
- {
- array_walk_recursive($data, array(&$this, '_unescape_slashes'));
- return $data;
- }
-
- return is_string($data) ? str_replace('{{slash}}', '\\', $data) : $data;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Unescape slashes
- *
- * This function converts any slash markers back into actual slashes
- *
- * @param string
- * @param string
- * @return void
- */
- protected function _unescape_slashes(&$val, $key)
- {
- if (is_string($val))
- {
- $val= str_replace('{{slash}}', '\\', $val);
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Garbage collection
- *
- * This deletes expired session rows from database
- * if the probability percentage is met
- *
- * @return void
- */
- protected function _sess_gc()
- {
- if ($this->sess_use_database !== TRUE)
- {
- return;
- }
-
- $probability = ini_get('session.gc_probability');
- $divisor = ini_get('session.gc_divisor');
-
- srand(time());
- if ((mt_rand(0, $divisor) / $divisor) < $probability)
- {
- $expire = $this->now - $this->sess_expiration;
-
- $this->CI->db->where('last_activity < '.$expire);
- $this->CI->db->delete($this->sess_table_name);
-
- log_message('debug', 'Session garbage collection performed.');
- }
- }
-
-}
-
-/* End of file Session.php */
-/* Location: ./system/libraries/Session.php */
630 system/libraries/Session/Session.php
View
@@ -0,0 +1,630 @@
+<?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
+ */
+
+
+/**
+ * CI_Session Class
+ *
+ * The user interface defined by EllisLabs, now with puggable drivers to manage different storage mechanisms.
+ * By default, the cookie session driver will load, but the 'sess_driver' config/param item (see above) can be
+ * used to specify the 'native' driver, or any other you might create.
+ * Once loaded, this driver setup is a drop-in replacement for the former CI_Session library, taking its place as the
+ * 'session' member of the global controller framework (e.g.: $CI->session or $this->session).
+ * In keeping with the CI_Driver methodology, multiple drivers may be loaded, although this might be a bit confusing.
+ * The CI_Session library class keeps track of the most recently loaded driver as "current" to call for driver methods.
+ * Ideally, one driver is loaded and all calls go directly through the main library interface. However, any methods
+ * called through the specific driver will switch the "current" driver to itself before invoking the library method
+ * (which will then call back into the driver for low-level operations). So, alternation between two drivers can be
+ * achieved by specifying which driver to use for each call (e.g.: $this->session->native->set_userdata('foo', 'bar');
+ * $this->session->cookie->userdata('foo'); $this->session->native->unset_userdata('foo');). Notice in the previous
+ * example that the _native_ userdata value 'foo' would be set to 'bar', which would NOT be returned by the call for
+ * the _cookie_ userdata 'foo', nor would the _cookie_ value be unset by the call to unset the _native_ 'foo' value.
+ *
+ * @package CodeIgniter
+ * @subpackage Libraries
+ * @category Sessions
+ * @author ExpressionEngine Dev Team
+ * @link http://codeigniter.com/user_guide/libraries/sessions.html
+ */
+class CI_Session extends CI_Driver_Library {
+ public $params = array();
+ protected $current = null;
+ protected $userdata = array();
+
+ const FLASHDATA_KEY = 'flash';
+ const FLASHDATA_NEW = ':new:';
+ const FLASHDATA_OLD = ':old:';
+ const FLASHDATA_EXP = ':exp:';
+ const EXPIRATION_KEY = '__expirations';
+ const TEMP_EXP_DEF = 300;
+
+ /**
+ * CI_Session constructor
+ *
+ * The constructor loads the configured driver ('sess_driver' in config.php or as a parameter), running
+ * routines in its constructor, and manages flashdata aging.
+ *
+ * @param array Configuration parameters
+ */
+ public function __construct(array $params = array())
+ {
+ log_message('debug', 'CI_Session Class Initialized');
+
+ // Get valid drivers list
+ $CI =& get_instance();
+ $this->valid_drivers = array(
+ 'Session_native',
+ 'Session_cookie'
+ );
+ $key = 'sess_valid_drivers';
+ $drivers = (isset($params[$key])) ? $params[$key] : $CI->config->item($key);
+ if ($drivers)
+ {
+ if ( ! is_array($drivers)) $drivers = array($drivers);
+
+ // Add driver names to valid list
+ foreach ($drivers as $driver)
+ {
+ if ( ! in_array(strtolower($driver), array_map('strtolower', $this->valid_drivers)))
+ {
+ $this->valid_drivers[] = $driver;
+ }
+ }
+ }
+
+ // Get driver to load
+ $key = 'sess_driver';
+ $driver = (isset($params[$key])) ? $params[$key] : $CI->config->item($key);
+ if ( ! $driver) $driver = 'cookie';
+ if ( ! in_array('session_'.strtolower($driver), array_map('strtolower', $this->valid_drivers)))
+ {
+ $this->valid_drivers[] = 'Session_'.$driver;
+ }
+
+ // Save a copy of parameters in case drivers need access
+ $this->params = $params;
+
+ // Load driver and get array reference
+ $this->load_driver($driver);
+
+ // Delete 'old' flashdata (from last request)
+ $this->_flashdata_sweep();
+
+ // Mark all new flashdata as old (data will be deleted before next request)
+ $this->_flashdata_mark();
+
+ // Delete expired tempdata
+ $this->_tempdata_sweep();
+
+ log_message('debug', 'CI_Session routines successfully run');
+ }
+
+ /**
+ * Loads session storage driver
+ *
+ * @param string Driver classname
+ * @return object Loaded driver object
+ */
+ public function load_driver($driver)
+ {
+ // Save reference to most recently loaded driver as library default and sync userdata
+ $this->current = parent::load_driver($driver);
+ $this->userdata =& $this->current->get_userdata();
+ return $this->current;
+ }
+
+ /**
+ * Select default session storage driver
+ *
+ * @param string Driver classname
+ * @return void
+ */
+ public function select_driver($driver)
+ {
+ // Validate driver name
+ $lowername = strtolower(str_replace('CI_', '', $driver));
+ if (in_array($lowername, array_map('strtolower', $this->valid_drivers)))
+ {
+ // See if driver is loaded
+ $child = str_replace($this->lib_name.'_', '', $driver);
+ if (isset($this->$child))
+ {
+ // See if driver is already current
+ if ($this->$child !== $this->current) {
+ // Make driver current and sync userdata
+ $this->current = $this->$child;
+ $this->userdata =& $this->current->get_userdata();
+ }
+ }
+ else
+ {
+ // Load new driver
+ $this->load_driver($child);
+ }
+ }
+ }
+
+ /**
+ * Destroy the current session
+ *
+ * @return void
+ */
+ public function sess_destroy()
+ {
+ // Just call destroy on driver
+ $this->current->sess_destroy();
+ }
+
+ /**
+ * Regenerate the current session
+ *
+ * @param boolean Destroy session data flag (default: false)
+ * @return void
+ */
+ public function sess_regenerate($destroy = false)
+ {
+ // Call regenerate on driver and resync userdata
+ $this->current->sess_regenerate($destroy);
+ $this->userdata =& $this->current->get_userdata();
+ }
+
+ /**
+ * Fetch a specific item from the session array
+ *
+ * @param string Item key
+ * @return string Item value or NULL if not found
+ */
+ public function userdata($item)
+ {
+ // Return value or NULL if not found
+ return ( ! isset($this->userdata[$item])) ? NULL : $this->userdata[$item];
+ }
+
+ /**
+ * Fetch all session data
+ *
+ * @return array User data array
+ */
+ public function all_userdata()
+ {
+ // Return entire array
+ return ( ! isset($this->userdata)) ? NULL : $this->userdata;
+ }
+
+ /**
+ * Fetch all flashdata
+ *
+ * @return array Flash data array
+ */
+ public function all_flashdata()
+ {
+ $out = array();
+
+ // loop through all userdata
+ foreach ($this->all_userdata() as $key => $val)
+ {
+ // if it contains flashdata, add it
+ if (strpos($key, self::FLASHDATA_KEY.self::FLASHDATA_OLD) !== FALSE)
+ {
+ $key = str_replace(self::FLASHDATA_KEY.self::FLASHDATA_OLD, '', $key);
+ $out[$key] = $val;
+ }
+ }
+ return $out;
+ }
+
+ /**
+ * Add or change data in the "userdata" array
+ *
+ * @param mixed Item name or array of items
+ * @param string Item value or empty string
+ * @return void
+ */
+ public function set_userdata($newdata = array(), $newval = '')
+ {
+ // Wrap params as array if singular
+ if (is_string($newdata))
+ {
+ $newdata = array($newdata => $newval);
+ }
+
+ // Set each name/value pair
+ if (count($newdata) > 0)
+ {
+ foreach ($newdata as $key => $val)
+ {
+ $this->userdata[$key] = $val;
+ }
+ }
+
+ // Tell driver data changed
+ $this->current->sess_save();
+ }
+
+ /**
+ * Delete a session variable from the "userdata" array
+ *
+ * @param mixed Item name or array of item names
+ * @return void
+ */
+ public function unset_userdata($newdata = array())
+ {
+ // Wrap single name as array
+ if (is_string($newdata))
+ {
+ $newdata = array($newdata => '');
+ }
+
+ // Unset each item name
+ if (count($newdata) > 0)
+ {
+ foreach ($newdata as $key => $val)
+ {
+ unset($this->userdata[$key]);
+ }
+ }
+
+ // Tell driver data changed
+ $this->current->sess_save();
+ }
+
+ /**
+ * Determine if an item exists
+ *
+ * @param string Item name
+ * @return boolean
+ */
+ public function has_userdata($item)
+ {
+ // Check for item name
+ return isset($this->userdata[$item]);
+ }
+
+ /**
+ * Add or change flashdata, only available until the next request
+ *
+ * @param mixed Item name or array of items
+ * @param string Item value or empty string
+ * @return void
+ */
+ public function set_flashdata($newdata = array(), $newval = '')
+ {
+ // Wrap item as array if singular
+ if (is_string($newdata))
+ {
+ $newdata = array($newdata => $newval);
+ }
+
+ // Prepend each key name and set value
+ if (count($newdata) > 0)
+ {
+ foreach ($newdata as $key => $val)
+ {
+ $flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_NEW.$key;
+ $this->set_userdata($flashdata_key, $val);
+ }
+ }
+ }
+
+ /**
+ * Keeps existing flashdata available to next request.
+ *
+ * @param string Item key
+ * @return void
+ */
+ public function keep_flashdata($key)
+ {
+ // 'old' flashdata gets removed. Here we mark all flashdata as 'new' to preserve it from _flashdata_sweep()
+ // Note the function will return NULL if the $key provided cannot be found
+ $old_flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_OLD.$key;
+ $value = $this->userdata($old_flashdata_key);
+
+ $new_flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_NEW.$key;
+ $this->set_userdata($new_flashdata_key, $value);
+ }
+
+ /**
+ * Fetch a specific flashdata item from the session array
+ *
+ * @param string Item key
+ * @return string
+ */
+ public function flashdata($key)
+ {
+ // Prepend key and retrieve value
+ $flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_OLD.$key;
+ return $this->userdata($flashdata_key);
+ }
+
+ /**
+ * Add or change tempdata, only available
+ * until expiration
+ *
+ * @param mixed Item name or array of items
+ * @param string Item value or empty string
+ * @param int Item lifetime in seconds or 0 for default
+ * @return void
+ */
+ public function set_tempdata($newdata = array(), $newval = '', $expire = 0)
+ {
+ // Set expiration time
+ $expire = time() + ($expire ? $expire : self::TEMP_EXP_DEF);
+
+ // Wrap item as array if singular
+ if (is_string($newdata))
+ {
+ $newdata = array($newdata => $newval);
+ }
+
+ // Get or create expiration list
+ $expirations = $this->userdata(self::EXPIRATION_KEY);
+ if ( ! $expirations)
+ {
+ $expirations = array();
+ }
+
+ // Prepend each key name and set value
+ if (count($newdata) > 0)
+ {
+ foreach ($newdata as $key => $val)
+ {
+ $tempdata_key = self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key;
+ $expirations[$tempdata_key] = $expire;
+ $this->set_userdata($tempdata_key, $val);
+ }
+ }
+
+ // Update expiration list
+ $this->set_userdata(self::EXPIRATION_KEY, $expirations);
+ }
+
+ /**
+ * Delete a temporary session variable from the "userdata" array
+ *
+ * @param mixed Item name or array of item names
+ * @return void
+ */
+ public function unset_tempdata($newdata = array())
+ {
+ // Get expirations list
+ $expirations = $this->userdata(self::EXPIRATION_KEY);
+ if ( ! $expirations || ! count($expirations))
+ {
+ // Nothing to do
+ return;
+ }
+
+ // Wrap single name as array
+ if (is_string($newdata))
+ {
+ $newdata = array($newdata => '');
+ }
+
+ // Prepend each item name and unset
+ if (count($newdata) > 0)
+ {
+ foreach ($newdata as $key => $val)
+ {
+ $tempdata_key = self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key;
+ unset($expirations[$tempdata_key]);
+ $this->unset_userdata($tempdata_key);
+ }
+ }
+
+ // Update expiration list
+ $this->set_userdata(self::EXPIRATION_KEY, $expirations);
+ }
+
+ /**
+ * Fetch a specific tempdata item from the session array
+ *
+ * @param string Item key
+ * @return string
+ */
+ public function tempdata($key)
+ {
+ // Prepend key and return value
+ $tempdata_key = self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key;
+ return $this->userdata($tempdata_key);
+ }
+
+ /**
+ * Identifies flashdata as 'old' for removal
+ * when _flashdata_sweep() runs.
+ *
+ * @access protected
+ * @return void
+ */
+ protected function _flashdata_mark()
+ {
+ $userdata = $this->all_userdata();
+ foreach ($userdata as $name => $value)
+ {
+ $parts = explode(self::FLASHDATA_NEW, $name);
+ if (is_array($parts) && count($parts) === 2)
+ {
+ $new_name = self::FLASHDATA_KEY.self::FLASHDATA_OLD.$parts[1];
+ $this->set_userdata($new_name, $value);
+ $this->unset_userdata($name);
+ }
+ }
+ }
+
+ /**
+ * Removes all flashdata marked as 'old'
+ *
+ * @access protected
+ * @return void
+ */
+ protected function _flashdata_sweep()
+ {
+ $userdata = $this->all_userdata();
+ foreach ($userdata as $key => $value)
+ {
+ if (strpos($key, self::FLASHDATA_OLD))
+ {
+ $this->unset_userdata($key);
+ }
+ }
+ }
+
+ /**
+ * Removes all expired tempdata
+ *
+ * @access protected
+ * @return void
+ */
+ protected function _tempdata_sweep()
+ {
+ // Get expirations list
+ $expirations = $this->userdata(self::EXPIRATION_KEY);
+ if ( ! $expirations || ! count($expirations))
+ {
+ // Nothing to do
+ return;
+ }
+
+ // Unset expired elements
+ $now = time();
+ $userdata = $this->all_userdata();
+ foreach ($userdata as $key => $value)
+ {
+ if (strpos($key, self::FLASHDATA_EXP) && $expirations[$key] < $now)
+ {
+ unset($expirations[$key]);
+ $this->unset_userdata($key);
+ }
+ }
+
+ // Update expiration list
+ $this->set_userdata(self::EXPIRATION_KEY, $expirations);
+ }
+}
+// END CI_Session Class
+
+
+/**
+ * CI_Session_driver Class
+ *
+ * Extend this class to make a new CI_Session driver.
+ * A CI_Session driver basically manages an array of name/value pairs with some sort of storage mechanism.
+ * To make a new driver, derive from (extend) CI_Session_driver. Overload the initialize method and read or create
+ * session data. Then implement a save handler to write changed data to storage (sess_save), a destroy handler
+ * to remove deleted data (sess_destroy), and an access handler to expose the data (get_userdata).
+ * Put your driver in the libraries/Session/drivers folder anywhere in the loader paths. This includes the
+ * application directory, the system directory, or any path you add with $CI->load->add_package_path().
+ * Your driver must be named CI_Session_<name>, and your filename must be Session_<name>.php,
+ * preferably also capitalized. (e.g.: CI_Session_foo in libraries/Session/drivers/Session_foo.php)
+ * Then specify the driver by setting 'sess_driver' in your config file or as a parameter when loading the CI_Session
+ * object. (e.g.: $config['sess_driver'] = 'foo'; OR $CI->load->driver('session', array('sess_driver' => 'foo')); )
+ * Already provided are the Native driver, which manages the native PHP $_SESSION array, and
+ * the Cookie driver, which manages the data in a browser cookie, with optional extra storage in a database table.
+ *
+ * @package CodeIgniter
+ * @subpackage Libraries
+ * @category Sessions
+ * @author ExpressionEngine Dev Team
+ */
+abstract class CI_Session_driver extends CI_Driver {
+ /**
+ * Decorate
+ *
+ * Decorates the child with the parent driver lib's methods and properties
+ *
+ * @param object Parent library object
+ * @return void
+ */
+ public function decorate($parent)
+ {
+ // Call base class decorate first
+ parent::decorate($parent);
+
+ // Call initialize method now that driver has access to $this->_parent
+ $this->initialize();
+ }
+
+ /**
+ * __call magic method
+ *
+ * Handles access to the parent driver library's methods
+ *
+ * @param string Library method name
+ * @param array Method arguments (default: none)
+ * @return mixed
+ */
+ public function __call($method, $args = array())
+ {
+ // Make sure the parent library uses this driver
+ $this->_parent->select_driver(get_class($this));
+ return parent::__call($method, $args);
+ }
+
+ /**
+ * Initialize driver
+ *
+ * @return void
+ */
+ protected function initialize()
+ {
+ // Overload this method to implement initialization
+ }
+
+ /**
+ * Save the session data
+ *
+ * Data in the array has changed - perform any storage synchronization necessary
+ * The child class MUST implement this abstract method!
+ *
+ * @return void
+ */
+ abstract public function sess_save();
+
+ /**
+ * Destroy the current session
+ *
+ * Clean up storage for this session - it has been terminated
+ * The child class MUST implement this abstract method!
+ *
+ * @return void
+ */
+ abstract public function sess_destroy();
+
+ /**
+ * Regenerate the current session
+ *
+ * Regenerate the session id
+ * The child class MUST implement this abstract method!
+ *
+ * @param boolean Destroy session data flag (default: false)
+ * @return void
+ */
+ abstract public function sess_regenerate($destroy = false);
+
+ /**
+ * Get a reference to user data array
+ *
+ * Give array access to the main CI_Session object
+ * The child class MUST implement this abstract method!
+ *
+ * @return array Reference to userdata
+ */
+ abstract public function &get_userdata();
+}
+// END CI_Session_driver Class
+
+
+/* End of file Session.php */
+/* Location: ./system/libraries/Session/Session.php */
+?>
799 system/libraries/Session/drivers/Session_cookie.php
View
@@ -0,0 +1,799 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 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:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @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
+ */
+
+/**
+ * Cookie-based session management driver
+ *
+ * This is the classic CI_Session functionality, as written by EllisLab, abstracted out to a driver.
+ *
+ * @package CodeIgniter
+ * @subpackage Libraries
+ * @category Sessions
+ * @author EllisLab Dev Team
+ * @link http://codeigniter.com/user_guide/libraries/sessions.html
+ */
+class CI_Session_cookie extends CI_Session_driver {
+ /**
+ * Whether to encrypt the session cookie
+ *
+ * @var bool
+ */
+ public $sess_encrypt_cookie = FALSE;
+
+ /**
+ * Whether to use to the database for session storage
+ *
+ * @var bool
+ */
+ public $sess_use_database = FALSE;
+
+ /**
+ * Name of the database table in which to store sessions
+ *
+ * @var string
+ */
+ public $sess_table_name = '';
+
+ /**
+ * Length of time (in seconds) for sessions to expire
+ *
+ * @var int
+ */
+ public $sess_expiration = 7200;
+
+ /**
+ * Whether to kill session on close of browser window
+ *
+ * @var bool
+ */
+ public $sess_expire_on_close = FALSE;
+
+ /**
+ * Whether to match session on ip address
+ *
+ * @var bool
+ */
+ public $sess_match_ip = FALSE;
+
+ /**
+ * Whether to match session on user-agent
+ *
+ * @var bool
+ */
+ public $sess_match_useragent = TRUE;
+
+ /**
+ * Name of session cookie
+ *
+ * @var string
+ */
+ public $sess_cookie_name = 'ci_session';
+
+ /**
+ * Session cookie prefix
+ *
+ * @var string
+ */
+ public $cookie_prefix = '';
+
+ /**
+ * Session cookie path
+ *
+ * @var string
+ */
+ public $cookie_path = '';
+
+ /**
+ * Session cookie domain
+ *
+ * @var string
+ */
+ public $cookie_domain = '';
+
+ /**
+ * Whether to set the cookie only on HTTPS connections
+ *
+ * @var bool
+ */
+ public $cookie_secure = FALSE;
+
+ /**
+ * Whether cookie should be allowed only to be sent by the server
+ *
+ * @var bool
+ */
+ public $cookie_httponly = FALSE;
+
+ /**
+ * Interval at which to update session
+ *
+ * @var int
+ */
+ public $sess_time_to_update = 300;
+
+ /**
+ * Key with which to encrypt the session cookie
+ *
+ * @var string
+ */
+ public $encryption_key = '';
+
+ /**
+ * Timezone to use for the current time
+ *
+ * @var string
+ */
+ public $time_reference = 'local';
+
+ /**
+ * Session data
+ *
+ * @var array
+ */
+ public $userdata = array();
+
+ /**
+ * Reference to CodeIgniter instance
+ *
+ * @var object
+ */
+ public $CI;
+
+ /**
+ * Current time
+ *
+ * @var int
+ */
+ public $now;
+
+ /**
+ * Default userdata keys
+ *
+ * @var array
+ */
+ protected $defaults = array(
+ 'session_id' => NULL,
+ 'ip_address' => NULL,
+ 'user_agent' => NULL,
+ 'last_activity' => NULL
+ );
+
+ /**
+ * Data needs DB update flag
+ *
+ * @var bool
+ */
+ protected $data_dirty = FALSE;
+
+ /**
+ * Initialize session driver object
+ *
+ * @access protected
+ * @return void
+ */
+ protected function initialize()
+ {
+ // Set the super object to a local variable for use throughout the class
+ $this->CI =& get_instance();
+
+ // Set all the session preferences, which can either be set
+ // manually via the $params array or via the config file
+ $prefs = array(
+ 'sess_encrypt_cookie',
+ 'sess_use_database',
+ 'sess_table_name',
+ 'sess_expiration',
+ 'sess_expire_on_close',
+ 'sess_match_ip',
+ 'sess_match_useragent',
+ 'sess_cookie_name',
+ 'cookie_path',
+ 'cookie_domain',
+ 'cookie_secure',
+ 'cookie_httponly',
+ 'sess_time_to_update',
+ 'time_reference',
+ 'cookie_prefix',
+ 'encryption_key'
+ );
+ foreach ($prefs as $key)
+ {
+ $this->$key = isset($this->_parent->params[$key]) ? $this->_parent->params[$key] :
+ $this->CI->config->item($key);
+ }
+
+ if ($this->encryption_key === '')
+ {
+ show_error('In order to use the Cookie Session driver you are required to set an encryption key '.
+ 'in your config file.');
+ }
+
+ // Load the string helper so we can use the strip_slashes() function
+ $this->CI->load->helper('string');
+
+ // Do we need encryption? If so, load the encryption class
+ if ($this->sess_encrypt_cookie === TRUE)
+ {
+ $this->CI->load->library('encrypt');
+ }
+
+ // Check for database
+ if ($this->sess_use_database === TRUE && $this->sess_table_name !== '')
+ {
+ // Load database driver
+ $this->CI->load->database();
+
+ // Register shutdown function
+ register_shutdown_function(array($this, '_update_db'));
+ }
+
+ // 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 = $this->_get_time();
+
+ // Set the session length. If the session expiration is
+ // set to zero we'll set the expiration two years from now.
+ if ($this->sess_expiration === 0)
+ {
+ $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.
+ if ( ! $this->_sess_read())
+ {
+ $this->_sess_create();
+ }
+ else
+ {
+ $this->_sess_update();
+ }
+
+ // Delete expired sessions if necessary
+ $this->_sess_gc();
+ }
+
+ /**
+ * Write the session data
+ *
+ * @return void
+ */
+ public function sess_save()
+ {
+ // Check for database
+ if ($this->sess_use_database === TRUE)
+ {
+ // Mark custom data as dirty so we know to update the DB
+ $this->data_dirty = TRUE;
+ }
+
+ // Write the cookie
+ $this->_set_cookie();
+ }
+
+ /**
+ * Destroy the current session
+ *
+ * @return void
+ */
+ public function sess_destroy()
+ {
+ // Kill the session DB row
+ if ($this->sess_use_database === TRUE && isset($this->userdata['session_id']))
+ {
+ $this->CI->db->delete($this->sess_table_name, array('session_id' => $this->userdata['session_id']));
+ }
+
+ // Kill the cookie
+ $this->_setcookie($this->sess_cookie_name, addslashes(serialize(array())), ($this->now - 31500000),
+ $this->cookie_path, $this->cookie_domain, 0);
+
+ // Kill session data
+ $this->userdata = array();
+ }
+
+ /**
+ * Regenerate the current session
+ *
+ * Regenerate the session id
+ *
+ * @param boolean Destroy session data flag (default: false)
+ * @return void
+ */
+ public function sess_regenerate($destroy = false)
+ {
+ // Check destroy flag
+ if ($destroy)
+ {
+ // Destroy old session and create new one
+ $this->sess_destroy();
+ $this->_sess_create();
+ }
+ else
+ {
+ // Just force an update to recreate the id
+ $this->_sess_update(true);
+ }
+ }
+
+ /**
+ * Get a reference to user data array
+ *
+ * @return array - Reference to userdata
+ */
+ public function &get_userdata()
+ {
+ // Return reference to array
+ return $this->userdata;
+ }
+
+ /**
+ * Fetch the current session data if it exists
+ *
+ * @access protected
+ * @return bool
+ */
+ protected function _sess_read()
+ {
+ // Fetch the cookie
+ $session = $this->CI->input->cookie($this->sess_cookie_name);
+
+ // No cookie? Goodbye cruel world!...
+ if ($session === NULL)
+ {
+ log_message('debug', 'A session cookie was not found.');
+ return FALSE;
+ }
+
+ // Check for encryption
+ if ($this->sess_encrypt_cookie === TRUE)
+ {
+ // Decrypt the cookie data
+ $session = $this->CI->encrypt->decode($session);
+ }
+ else
+ {
+ // Encryption was not used, so we need to check the md5 hash in the last 32 chars
+ $len = strlen($session)-32;
+ $hash = substr($session, $len);
+ $session = substr($session, 0, $len);
+
+ // Does the md5 hash match? This is to prevent manipulation of session data in userspace
+ if ($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.');
+ $this->sess_destroy();
+ return FALSE;
+ }
+ }
+
+ // Unserialize the session array
+ $session = $this->_unserialize($session);
+
+ // Is the session data we unserialized an array with the correct format?
+ if ( ! is_array($session) || ! isset($session['session_id'], $session['ip_address'], $session['user_agent'],
+ $session['last_activity']))
+ {
+ $this->sess_destroy();
+ return FALSE;
+ }
+
+ // Is the session current?
+ if (($session['last_activity'] + $this->sess_expiration) < $this->now)
+ {
+ $this->sess_destroy();
+ return FALSE;
+ }
+
+ // Does the IP match?
+ if ($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 &&
+ trim($session['user_agent']) !== trim(substr($this->CI->input->user_agent(), 0, 120)))
+ {
+ $this->sess_destroy();
+ return FALSE;
+ }
+
+ // Is there a corresponding session in the DB?
+ if ($this->sess_use_database === TRUE)
+ {
+ $this->CI->db->where('session_id', $session['session_id']);
+
+ if ($this->sess_match_ip === TRUE)
+ {
+ $this->CI->db->where('ip_address', $session['ip_address']);
+ }
+
+ if ($this->sess_match_useragent === TRUE)
+ {
+ $this->CI->db->where('user_agent', $session['user_agent']);
+ }
+
+ $query = $this->CI->db->limit(1)->get($this->sess_table_name);
+
+ // No result? Kill it!
+ if ($query->num_rows() === 0)
+ {
+ $this->sess_destroy();
+ return FALSE;
+ }
+
+ // Is there custom data? If so, add it to the main session array
+ $row = $query->row();
+ if ( ! empty($row->user_data))
+ {
+ $custom_data = $this->_unserialize($row->user_data);
+
+ if (is_array($custom_data))
+ {
+ $session = $session + $custom_data;
+ }
+ }
+ }
+
+ // Session is valid!
+ $this->userdata = $session;
+ return TRUE;
+ }
+
+ /**
+ * Create a new session
+ *
+ * @access protected
+ * @return void
+ */
+ protected function _sess_create()
+ {
+ // Initialize userdata
+ $this->userdata = array(
+ 'session_id' => $this->_make_sess_id(),
+ 'ip_address' => $this->CI->input->ip_address(),
+ 'user_agent' => substr($this->CI->input->user_agent(), 0, 120),
+ 'last_activity' => $this->now,
+ );
+
+ // Check for database
+ if ($this->sess_use_database === TRUE)
+ {
+ // Add empty user_data field and save the data to the DB
+ $this->CI->db->set('user_data', '')->insert($this->sess_table_name, $this->userdata);
+ }
+
+ // Write the cookie
+ $this->_set_cookie();
+ }
+
+ /**
+ * Update an existing session
+ *
+ * @access protected
+ * @param boolean Force update flag (default: false)
+ * @return void
+ */
+ protected function _sess_update($force = FALSE)
+ {
+ // We only update the session every five minutes by default (unless forced)
+ if ( ! $force && ($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)
+ {
+ return;
+ }
+
+ // Update last activity to now
+ $this->userdata['last_activity'] = $this->now;
+
+ // Save the old session id so we know which DB record to update
+ $old_sessid = $this->userdata['session_id'];
+
+ // Changing the session ID during an AJAX call causes problems
+ if ( ! $this->CI->input->is_ajax_request())
+ {
+ // Get new id
+ $this->userdata['session_id'] = $this->_make_sess_id();
+ }
+
+ // Check for database
+ if ($this->sess_use_database === TRUE)
+ {
+ // Update the session ID and last_activity field in the DB
+ $this->CI->db->update($this->sess_table_name, array(
+ 'last_activity' => $this->now,
+ 'session_id' => $this->userdata['session_id']
+ ), array('session_id' => $old_sessid));
+ }
+
+ // Write the cookie
+ $this->_set_cookie();
+ }
+
+ /**
+ * Update database with current data
+ *
+ * This gets called from the shutdown function and also
+ * registered with PHP to run at the end of the request
+ * so it's guaranteed to update even when a fatal error
+ * occurs. The first call makes the update and clears the
+ * dirty flag so it won't happen twice.
+ */
+ public function _update_db()
+ {
+ // Check for database and dirty flag and unsaved
+ if ($this->sess_use_database === TRUE && $this->data_dirty === TRUE)
+ {
+ // Set up activity and data fields to be set
+ // If we don't find custom data, user_data will remain an empty string
+ $set = array(
+ 'last_activity' => $this->userdata['last_activity'],
+ 'user_data' => ''
+ );
+
+ // Get the custom userdata, leaving out the defaults
+ // (which get stored in the cookie)
+ $userdata = array_diff_key($this->userdata, $this->defaults);
+
+ // Did we find any custom data?
+ if ( ! empty($userdata))
+ {
+ // Serialize the custom data array so we can store it
+ $set['user_data'] = $this->_serialize($userdata);
+ }
+
+ // Run the update query
+ // Any time we change the session id, it gets updated immediately,
+ // so our where clause below is always safe
+ $this->CI->db->update($this->sess_table_name, $set, array('session_id' => $this->userdata['session_id']));
+
+ // Clear dirty flag to prevent double updates
+ $this->data_dirty = FALSE;
+
+ log_message('debug', 'CI_Session Data Saved To DB');
+ }
+ }
+
+ /**
+ * Generate a new session id
+ *
+ * @return string Hashed session id
+ */
+ protected function _make_sess_id()
+ {
+ $new_sessid = '';
+ 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 .= $this->CI->input->ip_address();
+
+ // Turn it into a hash and return
+ return md5(uniqid($new_sessid, TRUE));
+ }
+
+ /**
+ * Get the "now" time
+ *
+ * @access protected
+ * @return int Time
+ */
+ protected function _get_time()
+ {
+ if ($this->time_reference === 'local' || $this->time_reference === date_default_timezone_get())
+ {
+ return time();
+ }
+
+ $datetime = new DateTime('now', new DateTimeZone($this->time_reference));
+ sscanf($datetime->format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second);
+
+ return mktime($hour, $minute, $second, $month, $day, $year);
+ }
+
+ /**
+ * Write the session cookie
+ *
+ * @access protected
+ * @return void
+ */
+ protected function _set_cookie()
+ {
+ // Get userdata (only defaults if database)
+ if ($this->sess_use_database === TRUE)
+ {
+ $cookie_data = array_intersect_key($this->userdata, $this->defaults);
+ }
+ else
+ {
+ $cookie_data = $this->userdata;
+ }
+
+ // Serialize the userdata for the cookie
+ $cookie_data = $this->_serialize($cookie_data);
+
+ if ($this->sess_encrypt_cookie === TRUE)
+ {
+ $cookie_data = $this->CI->encrypt->encode($cookie_data);
+ }
+ else
+ {
+ // if encryption is not used, we provide an md5 hash to prevent userside tampering
+ $cookie_data = $cookie_data.md5($cookie_data.$this->encryption_key);
+ }
+
+ $expire = ($this->sess_expire_on_close === TRUE) ? 0 : $this->sess_expiration + time();
+
+ // Set the cookie
+ $this->_setcookie($this->sess_cookie_name, $cookie_data, $expire, $this->cookie_path, $this->cookie_domain,
+ $this->cookie_secure, $this->cookie_httponly);
+ }
+
+ /**
+ * Set a cookie with the system
+ *
+ * This abstraction of the setcookie call allows overriding for unit testing
+ *
+ * @access protected
+ * @param string Cookie name
+ * @param string Cookie value
+ * @param int Expiration time
+ * @param string Cookie path
+ * @param string Cookie domain
+ * @param bool Secure connection flag
+ * @param bool HTTP protocol only flag
+ * @return void
+ */
+ protected function _setcookie($name, $value = '', $expire = 0, $path = '', $domain = '', $secure = false,
+ $httponly = false)
+ {
+ // Set the cookie
+ setcookie($name, $value, $expire, $path, $domain, $secure, $httponly);
+ }
+
+ /**
+ * Serialize an array
+ *
+ * This function first converts any slashes found in the array to a temporary
+ * marker, so when it gets unserialized the slashes will be preserved
+ *
+ * @access protected
+ * @param mixed Data to serialize
+ * @return string Serialized data
+ */
+ protected function _serialize($data)
+ {
+ if (is_array($data))
+ {
+ array_walk_recursive($data, array(&$this, '_escape_slashes'));
+ }
+ elseif (is_string($data))
+ {
+ $data = str_replace('\\', '{{slash}}', $data);
+ }
+ return serialize($data);
+ }
+
+ /**
+ * Escape slashes
+ *
+ * This function converts any slashes found into a temporary marker
+ *
+ * @access protected
+ * @param string Value
+ * @param string Key
+ * @return void
+ */
+ protected function _escape_slashes(&$val, $key)
+ {
+ if (is_string($val))
+ {
+ $val = str_replace('\\', '{{slash}}', $val);
+ }
+ }
+
+ /**
+ * Unserialize
+ *
+ * This function unserializes a data string, then converts any
+ * temporary slash markers back to actual slashes
+ *
+ * @access protected
+ * @param mixed Data to unserialize
+ * @return mixed Unserialized data
+ */
+ protected function _unserialize($data)
+ {
+ $data = @unserialize(strip_slashes(trim($data)));
+
+ if (is_array($data))
+ {
+ array_walk_recursive($data, array(&$this, '_unescape_slashes'));
+ return $data;
+ }
+
+ return is_string($data) ? str_replace('{{slash}}', '\\', $data) : $data;
+ }
+
+ /**
+ * Unescape slashes
+ *
+ * This function converts any slash markers back into actual slashes
+ *
+ * @access protected
+ * @param string Value
+ * @param string Key
+ * @return void
+ */
+ protected function _unescape_slashes(&$val, $key)
+ {
+ if (is_string($val))
+ {
+ $val= str_replace('{{slash}}', '\\', $val);
+ }
+ }
+
+ /**
+ * Garbage collection
+ *
+ * This deletes expired session rows from database
+ * if the probability percentage is met
+ *
+ * @access protected
+ * @return void
+ */