Session.inc
5.77 KB
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
<?php
/**
* $Id$
*
* This class is used for session management.
*
* @author owl sourceforge team
* @version $Revision$
* @package Owl
*/
class Session {
/**
* Creates a session.
*
* @param $userID
* user identifier
* @return $sessionID
* returns the generated sessionID
*/
function create($userID) {
global $default;
session_start();
// bind userID to session
$_SESSION["userID"] = $userID;
// lookup group id and add to session
$_SESSION["groupID"] = owlusergroup($userID);
// use the PHP generated session id
$sessionID = session_id();
// retrieve client ip
$ip = $this->getClientIP();
// insert session information into db
$sql = new Owl_DB;
$query = "insert into $default->owl_sessions_table (session_id, user_id, lastused, ip) values ('$sessionID', '$userID', '" . date("Y-m-d H:i:s", time()) . "', '$ip')";
//echo "query=$query<br>";
$result = $sql->query($query);
if(!$result) {
die("$lang_err_sess_write");
}
return $sessionID;
}
/**
* Destroys the current session.
*/
function destroy() {
global $default;
session_start();
// remove the session information from the database
$sql = new Owl_DB;
$query = "delete from $default->owl_sessions_table where session_id = '" . session_id() . "'";
$sql->query($query);
// remove the php4 session
session_unset();
session_destroy();
}
/**
* Removes any stale sessions for the specified userID
*
* @param userID
* the userID to remove stale sessions for
*/
function removeStaleSessions($userID) {
global $default;
// deletes any sessions for this userID where the default timeout has elapsed.
$time = time() - $default->owl_timeout;
$sql = new Owl_DB;
$sql->query("delete from $default->owl_sessions_table where user_id = '" . $userID . "' and lastused <= '" . date("Y-m-d H:i:s",$time) . "'");
}
/**
* Used to verify the current user's session.
*
* @return
* array containing the userID, groupID and session verification status
*/
function verify() {
global $default, $lang_sesstimeout, $lang_sessinuse, $lang_err_sess_notvalid;
getprefs();
$sessionID = session_id();
if (strlen($sessionID) > 0) {
// initialise return status
$sessionStatus["status"] = 0;
// this should be an existing session, so check the db
$sql = new Owl_DB;
$sql->query("select * from $default->owl_sessions_table where session_id = '$sessionID'");
$numrows = $sql->num_rows($sql);
$time = time();
// found one match
if ($numrows == "1") {
while($sql->next_record()) {
$ip = $this->getClientIP();
// check that ip matches
if ($ip == $sql->f("ip")) {
// now check if the timeout has been exceeded
if(($time - strtotime($sql->f("lastused"))) <= $default->owl_timeout) {
// session has been verified, update status
$sessionStatus["status"] = 1;
// only set the userID if its not in the array already
if (!$sessionStatus["userID"]) {
$sessionStatus["userID"] = $sql->f("user_id");
}
// lookup the user
$sql->query("select * from $default->owl_users_table where id = '".$sessionStatus["userid"]."'");
while($sql->next_record()) {
// only set the groupID if its not in the array already
if (!$sessionStatus["groupID"]) {
$sessionStatus["groupID"] = $sql->f("group_id");
}
}
// update last used timestamps
$sql->query("update $default->owl_sessions_table set lastused = '" . date("Y-m-d H:i:s",time()) ."' where user_id = '" . $sessionStatus["userID"] . "'");
// add the array to the session
$_SESSION["sessionStatus"] = $sessionStatus;
} else {
// session timed out status
$sessionStatus["status"] = 2;
$default->errorMessage = $lang_sesstimeout;
}
} else {
// session in use status
$sessionStatus["status"] = 3;
$default->errorMessage = $lang_sessinuse;
}
}
}
} else {
// there is no session
return false;
}
// return the array
return $sessionStatus;
}
/**
* Retrieves and returns the IP address of the current user
*/
function getClientIP() {
// get client ip
if(getenv("HTTP_CLIENT_IP")) {
$ip = getenv("HTTP_CLIENT_IP");
} elseif(getenv("HTTP_X_FORWARDED_FOR")) {
$forwardedip = getenv("HTTP_X_FORWARDED_FOR");
list($ip,$ip2,$ip3,$ip4)= split (",", $forwardedip);
} else {
$ip = getenv("REMOTE_ADDR");
}
return $ip;
}
}
?>