silverstripe-framework/core/Session.php

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<?php
/**
* Handles all manipulation of the session.
*
* The static methods are used to manipulate the currently active controller's session.
* The instance methods are used to manipulate a particular session. There can be more than one of these created.
*
* In order to support things like testing, the session is associated with a particular Controller. In normal usage, this is loaded from
* and saved to the regular PHP session, but for things like static-page-generation and unit-testing, you can create multiple Controllers,
* each with their own session.
*
* The instance object is basically just a way of manipulating a set of nested maps, and isn't specific to session data.
* This class is currently really basic and could do with a more well-thought-out implementation
* @package sapphire
* @subpackage control
*/
class Session {
/**
* @var $timeout Set session timeout
*/
static protected $timeout = 0;
static protected $session_ips = array();
/**
* Provide an <code>array</code> of rules specifing timeouts for IPv4 address ranges or
* individual IPv4 addresses. The key is an IP address or range and the value is the time
* until the session expires in seconds. For example:
*
* Session::set_timeout_ips(array(
* '127.0.0.1' => 36000
* ));
*
* Any user connecting from 127.0.0.1 (localhost) will have their session expired after 10 hours.
*
* Session::set_timeout is used to set the timeout value for any users whose address is not in the given IP range.
*
* @param array $session_ips Array of IPv4 rules.
*/
public static function set_timeout_ips($session_ips) {
if(!is_array($session_ips)) {
user_error("Session::set_timeout_ips expects an array as its argument", E_USER_NOTICE);
self::$session_ips = array();
} else {
self::$session_ips = $session_ips;
}
}
public static function set($name, $val) {
return Controller::curr()->getSession()->inst_set($name, $val);
}
public static function addToArray($name, $val) {
return Controller::curr()->getSession()->inst_addToArray($name, $val);
}
public static function get($name) {
return Controller::curr()->getSession()->inst_get($name);
}
public static function clear($name) {
return Controller::curr()->getSession()->inst_clear($name);
}
public static function getAll() {
return Controller::curr()->getSession()->inst_getAll();
}
public static function save() {
return Controller::curr()->getSession()->inst_save();
}
/**
* Session data
*/
protected $data = array();
protected $changedData = array();
/**
* Create a new session object, with the given starting data
* @param $data Can be an array of data (such as $_SESSION) or another Session object to clone.
*/
function __construct($data) {
if($data instanceof Session) $data = $data->inst_getAll();
$this->data = $data;
}
public function inst_set($name, $val) {
// Quicker execution path for "."-free names
if(strpos($name,'.') === false) {
$this->data[$name] = $val;
$this->changedData[$name] = $val;
} else {
$names = explode('.', $name);
// We still want to do this even if we have strict path checking for legacy code
$var = &$this->data;
$diffVar = &$this->changedData;
foreach($names as $n) {
$var = &$var[$n];
$diffVar = &$diffVar[$n];
}
$var = $val;
$diffVar = $val;
}
}
public function inst_addToArray($name, $val) {
$names = explode('.', $name);
// We still want to do this even if we have strict path checking for legacy code
$var = &$this->data;
$diffVar = &$this->changedData;
foreach($names as $n) {
$var = &$var[$n];
$diffVar = &$diffVar[$n];
}
$var[] = $val;
$diffVar[sizeof($var)-1] = $val;
}
public function inst_get($name) {
// Quicker execution path for "."-free names
if(strpos($name,'.') === false) {
if(isset($this->data[$name])) return $this->data[$name];
} else {
$names = explode('.', $name);
if(!isset($this->data)) {
return null;
}
$var = $this->data;
foreach($names as $n) {
if(!isset($var[$n])) {
return null;
}
$var = $var[$n];
}
return $var;
}
}
public function inst_clear($name) {
$names = explode('.', $name);
// We still want to do this even if we have strict path checking for legacy code
$var = &$this->data;
$diffVar = &$this->changedData;
foreach($names as $n) {
$var = &$var[$n];
$diffVar = &$diffVar[$n];
}
$var = null;
$diffVar = null;
}
public function inst_getAll() {
return $this->data;
}
/**
* Save data to session
* Only save the changes, so that anyone manipulating $_SESSION directly doesn't get burned.
*/
public function inst_save() {
$this->recursivelyApply($this->changedData, $_SESSION);
}
/**
* Recursively apply the changes represented in $data to $dest.
* Used to update $_SESSION
*/
protected function recursivelyApply($data, &$dest) {
foreach($data as $k => $v) {
if(is_array($v)) {
if(!isset($dest[$k])) $dest[$k] = array();
$this->recursivelyApply($v, $dest[$k]);
} else {
$dest[$k] = $v;
}
}
}
/**
* Sets the appropriate form message in session, with type. This will be shown once,
* for the form specified.
*
* @param formname the form name you wish to use ( usually $form->FormName() )
* @param messsage the message you wish to add to it
* @param type the type of message
*/
public static function setFormMessage($formname,$message,$type){
Session::set("FormInfo.$formname.message", $message);
Session::set("FormInfo.$formname.type", $type);
}
public static function start() {
self::load_config();
if(!session_id() && !headers_sent()) {
session_set_cookie_params(self::$timeout, Director::baseURL());
// @ is to supress win32 warnings/notices when session wasn't cleaned up properly
// There's nothing we can do about this, because it's an operating system function!
@session_start();
}
}
/**
* Use the Session::$session_ips array to set timeouts based on IP address or IP address
* range.
*
* Note: The use of _sessions.php is deprecated.
*/
public static function load_config() {
foreach(self::$session_ips as $sessionIP => $timeout) {
if(preg_match('/^([0-9.]+)\s?-\s?([0-9.]+)$/', $sessionIP, $ips)) {
if(isset($_SERVER['REMOTE_ADDR'])) {
$startIP = ip2long($ips[1]);
$endIP = ip2long($ips[2]);
$clientIP = ip2long($_SERVER['REMOTE_ADDR']);
$minIP = min($startIP, $endIP);
$maxIP = max($startIP, $endIP);
if($minIP <= $clientIP && $clientIP <= $maxIP) {
return self::set_timeout($timeout);
}
}
}
// TODO - Net masks or something
}
}
/**
* Enter description here...
*
* @param int $timeout Time until a session expires in seconds. Defaults to expire when browser is closed.
*/
public static function set_timeout($timeout) {
self::$timeout = intval($timeout);
}
public static function get_timeout() {
return self::$timeout;
}
}
?>