1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
<?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
*/
/**
* 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 EllisLab Dev Team
*/
class CI_Session_native extends CI_Session_driver {
/**
* Initialize session driver object
*
* @return void
*/
protected function initialize()
{
// Get config parameters
$config = array();
$prefs = array(
'sess_cookie_name',
'sess_expire_on_close',
'sess_expiration',
'sess_match_ip',
'sess_match_useragent',
'sess_time_to_update',
'cookie_prefix',
'cookie_path',
'cookie_domain',
'cookie_secure',
'cookie_httponly'
);
foreach ($prefs as $key)
{
$config[$key] = isset($this->_parent->params[$key])
? $this->_parent->params[$key]
: $this->CI->config->item($key);
}
// Set session name, if specified
if ($config['sess_cookie_name'])
{
// Differentiate name from cookie driver with '_id' suffix
$name = $config['sess_cookie_name'].'_id';
if ($config['cookie_prefix'])
{
// Prepend cookie prefix
$name = $config['cookie_prefix'].$name;
}
session_name($name);
}
// Set expiration, path, and domain
$expire = 7200;
$path = '/';
$domain = '';
$secure = (bool) $config['cookie_secure'];
$http_only = (bool) $config['cookie_httponly'];
if ($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, $secure, $http_only);
// Start session
session_start();
// Check session expiration, ip, and agent
$now = time();
$destroy = FALSE;
if (isset($_SESSION['last_activity']) && (($_SESSION['last_activity'] + $expire) < $now OR $_SESSION['last_activity'] > $now))
{
// Expired - destroy
$destroy = TRUE;
}
elseif ($config['sess_match_ip'] === TRUE && isset($_SESSION['ip_address'])
&& $_SESSION['ip_address'] !== $this->CI->input->ip_address())
{
// IP doesn't match - destroy
$destroy = TRUE;
}
elseif ($config['sess_match_useragent'] === TRUE && isset($_SESSION['user_agent'])
&& $_SESSION['user_agent'] !== trim(substr($this->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
$this->sess_destroy();
session_start();
}
// Check for update time
if ($config['sess_time_to_update'] && isset($_SESSION['last_activity'])
&& ($_SESSION['last_activity'] + $config['sess_time_to_update']) < $now)
{
// Changing the session ID amidst a series of AJAX calls causes problems
if( ! $this->CI->input->is_ajax_request())
{
// Regenerate ID, but don't destroy session
$this->sess_regenerate(FALSE);
}
}
// 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'] = $this->CI->input->ip_address();
}
if ($config['sess_match_useragent'] === TRUE && ! isset($_SESSION['user_agent']))
{
// Store user agent string
$_SESSION['user_agent'] = trim(substr($this->CI->input->user_agent(), 0, 50));
}
// Make session ID available
$_SESSION['session_id'] = session_id();
}
// ------------------------------------------------------------------------
/**
* Save the session data
*
* @return void
*/
public function sess_save()
{
// Nothing to do - changes to $_SESSION are automatically saved
}
// ------------------------------------------------------------------------
/**
* Destroy the current session
*
* @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'], $params['secure'], $params['httponly']);
unset($_COOKIE[$name]);
}
session_destroy();
}
// ------------------------------------------------------------------------
/**
* Regenerate the current session
*
* Regenerate the session id
*
* @param bool Destroy session data flag (default: FALSE)
* @return void
*/
public function sess_regenerate($destroy = FALSE)
{
// Just regenerate id, passing destroy flag
session_regenerate_id($destroy);
$_SESSION['session_id'] = session_id();
}
// ------------------------------------------------------------------------
/**
* Get a reference to user data array
*
* @return array Reference to userdata
*/
public function &get_userdata()
{
// Just return reference to $_SESSION
return $_SESSION;
}
}
/* End of file Session_native.php */
/* Location: ./system/libraries/Session/drivers/Session_native.php */
|
