<?// ----------------------------------------------------------------------
// Original Author of file: Jim McDonald
// Purpose of file: Session handling
// ----------------------------------------------------------------------
/**
* Set up session handling
*
* Set all PHP options for PostNuke session handling
*/
function pnSessionSetup()
{
global $HTTP_SERVER_VARS;
// Stop adding SID to URLs
ini_set('session.use_trans_sid', 0);
// User-defined save handler
ini_set('session.save_handler', 'user');
// How to store data
ini_set('session.serialize_handler', 'php');
// Use cookie to store the session ID
ini_set('session.use_cookies', 1);
// Name of our cookie
ini_set('session.name', 'TempSID');
// Lifetime of our cookie
$seclevel = pnConfigGetVar('seclevel');
switch ($seclevel) {
case 'High':
// Session lasts duration of browser
$lifetime = 0;
// Referer check
//ini_set('session.referer_check', "$host$path");
ini_set('session.referer_check', "$host");
break;
case 'Medium':
// Session lasts set number of days
$lifetime = pnConfigGetVar('secmeddays') * 86400;
break;
case 'Low':
// Session lasts unlimited number of days (well, lots, anyway)
// (Currently set to 25 years)
$lifetime = 788940000;
break;
}
ini_set('session.cookie_lifetime', $lifetime);
if (pnConfigGetVar('intranet') == false) {
// Cookie path
ini_set('session.cookie_path', $path);
// Cookie domain
// only needed for multi-server multisites - adapt as needed
//$domain = preg_replace('/^[^.]+/','',$host);
//ini_set('session.cookie_domain', $domain);
}
/*
* Session variables here are a bit 'different'. Because they sit in the
* global namespace we use a couple of helper functions to give them their
* own prefix, and also to force users to set new values for them if they
* require. This avoids blatant or accidental over-writing of session
* variables.
*
*/
/**
* Get a session variable
*
* @param name name of the session variable to get
*/
function pnSessionGetVar($name)
{
global $HTTP_SESSION_VARS;
$var = "PNSV$name";
global $$var;
if (!empty($HTTP_SESSION_VARS[$var])) {
return $HTTP_SESSION_VARS[$var];
}
return;
}
/**
* Set a session variable
* @param name name of the session variable to set
* @param value value to set the named session variable
*/
function pnSessionSetVar($name, $value)
{
global $HTTP_SESSION_VARS;
$var = "PNSV$name";
global $$var;
$$var = $value;
$HTTP_SESSION_VARS[$var] = $value;
session_register($var);
return true;
}
/**
* Delete a session variable
* @param name name of the session variable to delete
*/
function pnSessionDelVar($name)
{
$var = "PNSV$name";
global $$var;
// Fix for PHP >4.0.6 By John Barnett (johnpb)
//unset($$var);
unset($GLOBALS[$var]);
session_unregister($var);
return true;
}
/**
* Initialise session
*/
function pnSessionInit()
{
global $HTTP_SERVER_VARS;
// First thing we do is ensure that there is no attempted pollution
// of the session namespace
foreach($GLOBALS as $k=>$v) {
if (preg_match('/^PNSV/', $k)) {
return false;
}
}
// Kick it
session_start();
// Have to re-write the cache control header to remove no-save, this
// allows downloading of files to disk for application handlers
// adam_baum - no-cache was stopping modules (andromeda) from caching the playlists, et al.
// any strange behaviour encountered, revert to commented out code.
//Header('Cache-Control: no-cache, must-revalidate, post-check=0, pre-check=0');
Header('Cache-Control: cache');
$sessid = session_id();
// Get (actual) client IP addr
$ipaddr = $HTTP_SERVER_VARS['REMOTE_ADDR'];
if (empty($ipaddr)) {
$ipaddr = getenv('REMOTE_ADDR');
}
if (!empty($HTTP_SERVER_VARS['HTTP_CLIENT_IP'])) {
$ipaddr = $HTTP_SERVER_VARS['HTTP_CLIENT_IP'];
}
$tmpipaddr = getenv('HTTP_CLIENT_IP');
if (!empty($tmpipaddr)) {
$ipaddr = $tmpipaddr;
}
if (!empty($HTTP_SERVER_VARS['HTTP_X_FORWARDED_FOR'])) {
$ipaddr = preg_replace('/,.*/', '', $HTTP_SERVER_VARS['HTTP_X_FORWARDED_FOR']);
}
$tmpipaddr = getenv('HTTP_X_FORWARDED_FOR');
if (!empty($tmpipaddr)) {
$ipaddr = preg_replace('/,.*/', '', $tmpipaddr);
}
if (!$result->EOF) {
// jgm - this has been commented out so that the nice AOL people
// can view PN pages, will examine full implications of this
// later
// list($dbipaddr) = $result->fields;
$result->Close();
// echo "dd";
//echo $sessid;
// if ($ipaddr == $dbipaddr) {
pnSessionCurrent($sessid);
// } else {
// // Mismatch - destroy the session
// session_destroy();
// pnRedirect('index.php');
// return false;
// }
} else {
pnSessionNew($sessid, $ipaddr);
// Generate a random number, used for
// some authentication
srand((double)microtime()*1000000);
pnSessionSetVar('rand', rand());
}
return true;
}
/**
* Continue a current session
* @private
* @param sessid the session ID
*/
function pnSessionCurrent($sessid)
{
list($dbconn) = pnDBGetConn();
$pntable = pnDBGetTables();
// Touch the last used time
$query = "UPDATE $sessioninfotable
SET $sessioninfocolumn[lastused] = " . time() . "
WHERE $sessioninfocolumn[sessid] = '" . pnVarPrepForStore($sessid) . "'";
$result = $dbconn->Execute($query);
if ($dbconn->ErrorNo() != 0) {
return false;
}
return true;
}
/**
* Create a new session
* @private
* @param sessid the session ID
* @param ipaddr the IP address of the host with this session
*/
function pnSessionNew($sessid, $ipaddr)
{
list($dbconn) = pnDBGetConn();
$pntable = pnDBGetTables();
/**
* PHP function to open the session
* @private
*/
function pnSessionOpen($path, $name)
{
// Nothing to do - database opened elsewhere
return true;
}
/**
* PHP function to close the session
* @private
*/
function pnSessionClose()
{
// Nothing to do - database closed elsewhere
return true;
}
/**
* PHP function to read a set of session variables
* @private
*/
function pnSessionRead($sessid)
{
list($dbconn) = pnDBGetConn();
$pntable = pnDBGetTables();
/**
* PHP function to write a set of session variables
* @private
*/
function pnSessionWrite($sessid, $vars)
{
list($dbconn) = pnDBGetConn();
$pntable = pnDBGetTables();
switch (pnConfigGetVar('seclevel')) {
case 'Low':
// Low security - delete session info if user decided not to
// remember themself
$where = "WHERE $sessioninfocolumn[vars] NOT LIKE '%PNSVrememberme|%'
AND $sessioninfocolumn[lastused] < " . (time() - (pnConfigGetVar('secinactivemins') * 60));
break;
case 'Medium':
// Medium security - delete session info if session cookie has
// expired or user decided not to remember
// themself
$where = "WHERE ($sessioninfocolumn[vars] NOT LIKE '%PNSVrememberme|%'
AND $sessioninfocolumn[lastused] < " . (time() - (pnConfigGetVar('secinactivemins') * 60)) . ")
OR $sessioninfocolumn[firstused] < " . (time() - (pnConfigGetVar('secmeddays') * 86400));
break;
case 'High':
default:
// High security - delete session info if user is inactive
$where = "WHERE $sessioninfocolumn[lastused] < " . (time() - (pnConfigGetVar('secinactivemins') * 60));
break;
}
$query = "DELETE FROM $sessioninfotable $where";
$dbconn->Execute($query);
Load balance : Server 03
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