mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
656 lines
18 KiB
PHP
656 lines
18 KiB
PHP
<?php
|
|
|
|
namespace SilverStripe\Control;
|
|
|
|
use BadMethodCallException;
|
|
use SilverStripe\Core\Config\Configurable;
|
|
use SilverStripe\Dev\Deprecation;
|
|
|
|
/**
|
|
* Handles all manipulation of the session.
|
|
*
|
|
* An instance of a `Session` object can be retrieved via an `HTTPRequest` by calling the `getSession()` method.
|
|
*
|
|
* 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.
|
|
*
|
|
* <b>Saving Data</b>
|
|
*
|
|
* Once you've retrieved a session instance, you can write a value to a users session using the function {@link Session::set()}.
|
|
*
|
|
* <code>
|
|
* $request->getSession()->set('MyValue', 6);
|
|
* </code>
|
|
*
|
|
* Saves the value of "6" to the MyValue session data. You can also save arrays or serialized objects in session (but
|
|
* note there may be size restrictions as to how much you can save)
|
|
*
|
|
* <code>
|
|
*
|
|
* $session = $request->getSession();
|
|
*
|
|
* // save a variable
|
|
* $var = 1;
|
|
* $session->set('MyVar', $var);
|
|
*
|
|
* // saves an array
|
|
* $session->set('MyArrayOfValues', array('1', '2', '3'));
|
|
*
|
|
* // saves an object (you'll have to unserialize it back)
|
|
* $object = new Object();
|
|
*
|
|
* $session->set('MyObject', serialize($object));
|
|
* </code>
|
|
*
|
|
* <b>Accessing Data</b>
|
|
*
|
|
* Once you have saved a value to the Session you can access it by using the {@link Session::get()} function.
|
|
* Note that session data isn't persisted in PHP's own session store (via $_SESSION)
|
|
* until {@link Session::save()} is called, which happens automatically at the end of a standard request
|
|
* through {@link SilverStripe\Control\Middleware\SessionMiddleware}.
|
|
*
|
|
* The values in the comments are the values stored from the previous example.
|
|
*
|
|
* <code>
|
|
* public function bar() {
|
|
* $session = $this->getRequest()->getSession();
|
|
* $value = $session->get('MyValue'); // $value = 6
|
|
* $var = $session->get('MyVar'); // $var = 1
|
|
* $array = $session->get('MyArrayOfValues'); // $array = array(1,2,3)
|
|
* $object = $session->get('MyObject', unserialize($object)); // $object = Object()
|
|
* }
|
|
* </code>
|
|
*
|
|
* You can also get all the values in the session at once. This is useful for debugging.
|
|
*
|
|
* <code>
|
|
* $session->getAll(); // returns an array of all the session values.
|
|
* </code>
|
|
*
|
|
* <b>Clearing Data</b>
|
|
*
|
|
* Once you have accessed a value from the Session it doesn't automatically wipe the value from the Session, you have
|
|
* to specifically remove it. To clear a value you can either delete 1 session value by the name that you saved it
|
|
*
|
|
* <code>
|
|
* $session->clear('MyValue'); // MyValue is no longer 6.
|
|
* </code>
|
|
*
|
|
* Or you can clear every single value in the session at once. Note SilverStripe stores some of its own session data
|
|
* including form and page comment information. None of this is vital but `clearAll()` will clear everything.
|
|
*
|
|
* <code>
|
|
* $session->clearAll();
|
|
* </code>
|
|
*
|
|
* @see Cookie
|
|
* @see HTTPRequest
|
|
*/
|
|
class Session
|
|
{
|
|
use Configurable;
|
|
|
|
/**
|
|
* Set session timeout in seconds.
|
|
*
|
|
* @var int
|
|
* @config
|
|
*/
|
|
private static $timeout = 0;
|
|
|
|
/**
|
|
* @config
|
|
* @var array
|
|
*/
|
|
private static $session_ips = [];
|
|
|
|
/**
|
|
* @config
|
|
* @var string
|
|
*/
|
|
private static $cookie_domain;
|
|
|
|
/**
|
|
* @config
|
|
* @var string
|
|
*/
|
|
private static $cookie_path;
|
|
|
|
/**
|
|
* @config
|
|
* @var string
|
|
*/
|
|
private static $session_store_path;
|
|
|
|
/**
|
|
* @config
|
|
* @var boolean
|
|
*/
|
|
private static $cookie_secure = false;
|
|
|
|
/**
|
|
* @config
|
|
* @var string
|
|
*/
|
|
private static $cookie_name_secure = 'SECSESSID';
|
|
|
|
/**
|
|
* Name of session cache limiter to use.
|
|
* Defaults to '' to disable cache limiter entirely.
|
|
*
|
|
* @see https://secure.php.net/manual/en/function.session-cache-limiter.php
|
|
* @var string|null
|
|
*/
|
|
private static $sessionCacheLimiter = '';
|
|
|
|
/**
|
|
* Invalidate the session if user agent header changes between request. Defaults to true. Disabling this checks is
|
|
* not recommended.
|
|
* @var bool
|
|
* @config
|
|
*/
|
|
private static $strict_user_agent_check = true;
|
|
|
|
/**
|
|
* Session data.
|
|
* Will be null if session has not been started
|
|
*
|
|
* @var array|null
|
|
*/
|
|
protected $data = null;
|
|
|
|
/**
|
|
* @var bool
|
|
*/
|
|
protected $started = false;
|
|
|
|
/**
|
|
* List of keys changed. This is a nested array which represents the
|
|
* keys modified in $this->data. The value of each item is either "true"
|
|
* or a nested array.
|
|
*
|
|
* If a value is in changedData but not in data, it must be removed
|
|
* from the destination during save().
|
|
*
|
|
* Only highest level changes are stored. E.g. changes to `Base.Sub`
|
|
* and then `Base` only records `Base` as the change.
|
|
*
|
|
* E.g.
|
|
* [
|
|
* 'Base' => true,
|
|
* 'Key' => [
|
|
* 'Nested' => true,
|
|
* ],
|
|
* ]
|
|
*
|
|
* @var array
|
|
*/
|
|
protected $changedData = [];
|
|
|
|
/**
|
|
* Get user agent for this request
|
|
*
|
|
* @param HTTPRequest $request
|
|
* @return string
|
|
*/
|
|
protected function userAgent(HTTPRequest $request)
|
|
{
|
|
return $request->getHeader('User-Agent');
|
|
}
|
|
|
|
/**
|
|
* Start PHP session, then create a new Session object with the given start data.
|
|
*
|
|
* @param array|null|Session $data Can be an array of data (such as $_SESSION) or another Session object to clone.
|
|
* If null, this session is treated as unstarted.
|
|
*/
|
|
public function __construct($data)
|
|
{
|
|
if ($data instanceof Session) {
|
|
$data = $data->getAll();
|
|
}
|
|
|
|
$this->data = $data;
|
|
$this->started = isset($data);
|
|
}
|
|
|
|
/**
|
|
* Init this session instance before usage,
|
|
* if a session identifier is part of the passed in request.
|
|
* Otherwise, a session might be started in {@link save()}
|
|
* if session data needs to be written with a new session identifier.
|
|
*
|
|
* @param HTTPRequest $request
|
|
*/
|
|
public function init(HTTPRequest $request)
|
|
{
|
|
if (!$this->isStarted() && $this->requestContainsSessionId($request)) {
|
|
$this->start($request);
|
|
}
|
|
|
|
// Funny business detected!
|
|
if (self::config()->get('strict_user_agent_check') && isset($this->data['HTTP_USER_AGENT'])) {
|
|
if ($this->data['HTTP_USER_AGENT'] !== $this->userAgent($request)) {
|
|
$this->clearAll();
|
|
$this->restart($request);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Destroy existing session and restart
|
|
*
|
|
* @param HTTPRequest $request
|
|
*/
|
|
public function restart(HTTPRequest $request)
|
|
{
|
|
$this->destroy();
|
|
$this->start($request);
|
|
}
|
|
|
|
/**
|
|
* Determine if this session has started
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function isStarted()
|
|
{
|
|
return $this->started;
|
|
}
|
|
|
|
/**
|
|
* @param HTTPRequest $request
|
|
* @return bool
|
|
*/
|
|
public function requestContainsSessionId(HTTPRequest $request)
|
|
{
|
|
$secure = Director::is_https($request) && $this->config()->get('cookie_secure');
|
|
$name = $secure ? $this->config()->get('cookie_name_secure') : session_name();
|
|
return (bool)Cookie::get($name);
|
|
}
|
|
|
|
/**
|
|
* Begin session, regardless if a session identifier is present in the request,
|
|
* or whether any session data needs to be written.
|
|
* See {@link init()} if you want to "lazy start" a session.
|
|
*
|
|
* @param HTTPRequest $request The request for which to start a session
|
|
*/
|
|
public function start(HTTPRequest $request)
|
|
{
|
|
if ($this->isStarted()) {
|
|
throw new BadMethodCallException("Session has already started");
|
|
}
|
|
|
|
$path = $this->config()->get('cookie_path');
|
|
if (!$path) {
|
|
$path = Director::baseURL();
|
|
}
|
|
$domain = $this->config()->get('cookie_domain');
|
|
$secure = Director::is_https($request) && $this->config()->get('cookie_secure');
|
|
$session_path = $this->config()->get('session_store_path');
|
|
$timeout = $this->config()->get('timeout');
|
|
|
|
// Director::baseURL can return absolute domain names - this extracts the relevant parts
|
|
// for the session otherwise we can get broken session cookies
|
|
if (Director::is_absolute_url($path)) {
|
|
$urlParts = parse_url($path);
|
|
$path = $urlParts['path'];
|
|
if (!$domain) {
|
|
$domain = $urlParts['host'];
|
|
}
|
|
}
|
|
|
|
// If the session cookie is already set, then the session can be read even if headers_sent() = true
|
|
// This helps with edge-case such as debugging.
|
|
$data = [];
|
|
if (!session_id() && (!headers_sent() || $this->requestContainsSessionId($request))) {
|
|
if (!headers_sent()) {
|
|
session_set_cookie_params($timeout ?: 0, $path, $domain ?: null, $secure, true);
|
|
|
|
$limiter = $this->config()->get('sessionCacheLimiter');
|
|
if (isset($limiter)) {
|
|
session_cache_limiter($limiter);
|
|
}
|
|
|
|
// Allow storing the session in a non standard location
|
|
if ($session_path) {
|
|
session_save_path($session_path);
|
|
}
|
|
|
|
// If we want a secure cookie for HTTPS, use a separate session name. This lets us have a
|
|
// separate (less secure) session for non-HTTPS requests
|
|
// if headers_sent() is true then it's best to throw the resulting error rather than risk
|
|
// a security hole.
|
|
if ($secure) {
|
|
session_name($this->config()->get('cookie_name_secure'));
|
|
}
|
|
|
|
session_start();
|
|
|
|
// Session start emits a cookie, but only if there's no existing session. If there is a session timeout
|
|
// tied to this request, make sure the session is held for the entire timeout by refreshing the cookie age.
|
|
if ($timeout && $this->requestContainsSessionId($request)) {
|
|
Cookie::set(session_name(), session_id(), $timeout / 86400, $path, $domain ?: null, $secure, true);
|
|
}
|
|
} else {
|
|
// If headers are sent then we can't have a session_cache_limiter otherwise we'll get a warning
|
|
session_cache_limiter(null);
|
|
}
|
|
|
|
if (isset($_SESSION)) {
|
|
// Initialise data from session store if present
|
|
$data = $_SESSION;
|
|
|
|
// Merge in existing in-memory data, taking priority over session store data
|
|
$this->recursivelyApply((array)$this->data, $data);
|
|
}
|
|
}
|
|
|
|
// Save any modified session data back to the session store if present, otherwise initialise it to an array.
|
|
$this->data = $data;
|
|
|
|
$this->started = true;
|
|
}
|
|
|
|
/**
|
|
* Destroy this session
|
|
*
|
|
* @param bool $removeCookie
|
|
*/
|
|
public function destroy($removeCookie = true)
|
|
{
|
|
if (session_id()) {
|
|
if ($removeCookie) {
|
|
$path = $this->config()->get('cookie_path') ?: Director::baseURL();
|
|
$domain = $this->config()->get('cookie_domain');
|
|
$secure = $this->config()->get('cookie_secure');
|
|
Cookie::force_expiry(session_name(), $path, $domain, $secure, true);
|
|
}
|
|
session_destroy();
|
|
}
|
|
// Clean up the superglobal - session_destroy does not do it.
|
|
// http://nz1.php.net/manual/en/function.session-destroy.php
|
|
unset($_SESSION);
|
|
$this->data = null;
|
|
$this->started = false;
|
|
}
|
|
|
|
/**
|
|
* Set session value
|
|
*
|
|
* @param string $name
|
|
* @param mixed $val
|
|
* @return $this
|
|
*/
|
|
public function set($name, $val)
|
|
{
|
|
$var = &$this->nestedValueRef($name, $this->data);
|
|
|
|
// Mark changed
|
|
if ($var !== $val) {
|
|
$var = $val;
|
|
$this->markChanged($name);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Mark key as changed
|
|
*
|
|
* @internal
|
|
* @param string $name
|
|
*/
|
|
protected function markChanged($name)
|
|
{
|
|
$diffVar = &$this->changedData;
|
|
foreach (explode('.', $name) as $namePart) {
|
|
if (!isset($diffVar[$namePart])) {
|
|
$diffVar[$namePart] = [];
|
|
}
|
|
$diffVar = &$diffVar[$namePart];
|
|
|
|
// Already diffed
|
|
if ($diffVar === true) {
|
|
return;
|
|
}
|
|
}
|
|
// Mark changed
|
|
$diffVar = true;
|
|
}
|
|
|
|
/**
|
|
* Merge value with array
|
|
*
|
|
* @param string $name
|
|
* @param mixed $val
|
|
*/
|
|
public function addToArray($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;
|
|
}
|
|
|
|
/**
|
|
* Get session value
|
|
*
|
|
* @param string $name
|
|
* @return mixed
|
|
*/
|
|
public function get($name)
|
|
{
|
|
return $this->nestedValue($name, $this->data);
|
|
}
|
|
|
|
/**
|
|
* Clear session value
|
|
*
|
|
* @param string $name
|
|
* @return $this
|
|
*/
|
|
public function clear($name)
|
|
{
|
|
// Get var by path
|
|
$var = $this->nestedValue($name, $this->data);
|
|
|
|
// Unset var
|
|
if ($var !== null) {
|
|
// Unset parent key
|
|
$parentParts = explode('.', $name);
|
|
$basePart = array_pop($parentParts);
|
|
if ($parentParts) {
|
|
$parent = &$this->nestedValueRef(implode('.', $parentParts), $this->data);
|
|
unset($parent[$basePart]);
|
|
} else {
|
|
unset($this->data[$name]);
|
|
}
|
|
$this->markChanged($name);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Clear all values
|
|
*/
|
|
public function clearAll()
|
|
{
|
|
if ($this->data && is_array($this->data)) {
|
|
foreach (array_keys($this->data) as $key) {
|
|
$this->clear($key);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get all values
|
|
*
|
|
* @return array|null
|
|
*/
|
|
public function getAll()
|
|
{
|
|
return $this->data;
|
|
}
|
|
|
|
/**
|
|
* Set user agent key
|
|
*
|
|
* @param HTTPRequest $request
|
|
*/
|
|
public function finalize(HTTPRequest $request)
|
|
{
|
|
$this->set('HTTP_USER_AGENT', $this->userAgent($request));
|
|
}
|
|
|
|
/**
|
|
* Save data to session
|
|
* Only save the changes, so that anyone manipulating $_SESSION directly doesn't get burned.
|
|
*
|
|
* @param HTTPRequest $request
|
|
*/
|
|
public function save(HTTPRequest $request)
|
|
{
|
|
if ($this->changedData) {
|
|
$this->finalize($request);
|
|
|
|
if (!$this->isStarted()) {
|
|
$this->start($request);
|
|
}
|
|
|
|
// Apply all changes recursively, implicitly writing them to the actual PHP session store.
|
|
$this->recursivelyApplyChanges($this->changedData, $this->data, $_SESSION);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Recursively apply the changes represented in $data to $dest.
|
|
* Used to update $_SESSION
|
|
*
|
|
* @deprecated 4.1.0:5.0.0 Use recursivelyApplyChanges() instead
|
|
* @param array $data
|
|
* @param array $dest
|
|
*/
|
|
protected function recursivelyApply($data, &$dest)
|
|
{
|
|
Deprecation::notice('5.0', 'Use recursivelyApplyChanges() instead');
|
|
foreach ($data as $k => $v) {
|
|
if (is_array($v)) {
|
|
if (!isset($dest[$k]) || !is_array($dest[$k])) {
|
|
$dest[$k] = [];
|
|
}
|
|
$this->recursivelyApply($v, $dest[$k]);
|
|
} else {
|
|
$dest[$k] = $v;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the list of changed keys
|
|
*
|
|
* @return array
|
|
*/
|
|
public function changedData()
|
|
{
|
|
return $this->changedData;
|
|
}
|
|
|
|
/**
|
|
* Navigate to nested value in source array by name,
|
|
* creating a null placeholder if it doesn't exist.
|
|
*
|
|
* @internal
|
|
* @param string $name
|
|
* @param array $source
|
|
* @return mixed Reference to value in $source
|
|
*/
|
|
protected function &nestedValueRef($name, &$source)
|
|
{
|
|
// Find var to change
|
|
$var = &$source;
|
|
foreach (explode('.', $name) as $namePart) {
|
|
if (!isset($var)) {
|
|
$var = [];
|
|
}
|
|
if (!isset($var[$namePart])) {
|
|
$var[$namePart] = null;
|
|
}
|
|
$var = &$var[$namePart];
|
|
}
|
|
return $var;
|
|
}
|
|
|
|
/**
|
|
* Navigate to nested value in source array by name,
|
|
* returning null if it doesn't exist.
|
|
*
|
|
* @internal
|
|
* @param string $name
|
|
* @param array $source
|
|
* @return mixed Value in array in $source
|
|
*/
|
|
protected function nestedValue($name, $source)
|
|
{
|
|
// Find var to change
|
|
$var = $source;
|
|
foreach (explode('.', $name) as $namePart) {
|
|
if (!isset($var[$namePart])) {
|
|
return null;
|
|
}
|
|
$var = $var[$namePart];
|
|
}
|
|
return $var;
|
|
}
|
|
|
|
/**
|
|
* Apply all changes using separate keys and data sources and a destination
|
|
*
|
|
* @internal
|
|
* @param array $changes
|
|
* @param array $source
|
|
* @param array $destination
|
|
*/
|
|
protected function recursivelyApplyChanges($changes, $source, &$destination)
|
|
{
|
|
$source = $source ?: [];
|
|
foreach ($changes as $key => $changed) {
|
|
if ($changed === true) {
|
|
// Determine if replacement or removal
|
|
if (array_key_exists($key, $source)) {
|
|
$destination[$key] = $source[$key];
|
|
} else {
|
|
unset($destination[$key]);
|
|
}
|
|
} else {
|
|
// Recursively apply
|
|
$destVal = &$this->nestedValueRef($key, $destination);
|
|
$sourceVal = $this->nestedValue($key, $source);
|
|
$this->recursivelyApplyChanges($changed, $sourceVal, $destVal);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Regenerate session id
|
|
*
|
|
* @internal This is for internal use only. Isn't a part of public API.
|
|
*/
|
|
public function regenerateSessionId()
|
|
{
|
|
if (!headers_sent() && session_status() === PHP_SESSION_ACTIVE) {
|
|
session_regenerate_id(true);
|
|
}
|
|
}
|
|
}
|