@ -9,60 +9,47 @@
namespace yii\web; namespace yii\web;
use Yii;
use yii\base\Component; use yii\base\Component;
use yii\base\InvalidParamException; use yii\base\InvalidParamException;
/** /**
* Session provides session-level data management and the related configurations. * Session provides session-level data management and the related configurations.
* *
* To start the session, call {@link open()}; To complete and send out session data, call {@link close()} ; * To start the session, call [[open()]]; To complete and send out session data, call [[close()]] ;
* To destroy the session, call {@link destroy()} . * To destroy the session, call [[destroy()]] .
* *
* If {@link autoStart} is set true, the session will be started automatically * If [[autoStart]] is set true, the session will be started automatically
* when the application component is initialized by the application. * when the application component is initialized by the application.
* *
* Session can be used like an array to set and get session data. For example, * Session can be used like an array to set and get session data. For example,
* < pre >
* $session=new Session;
* $session->open();
* $value1=$session['name1']; // get session variable 'name1'
* $value2=$session['name2']; // get session variable 'name2'
* foreach($session as $name=>$value) // traverse all session variables
* $session['name3']=$value3; // set session variable 'name3'
* < / pre >
* *
* The following configurations are available for session: * ~~~
* < ul > * $session = new Session;
* < li > {@link setSessionID sessionID};< / li > * $session->open();
* < li > {@link setSessionName sessionName};< / li > * $value1 = $session['name1']; // get session variable 'name1'
* < li > {@link autoStart};< / li > * $value2 = $session['name2']; // get session variable 'name2'
* < li > {@link setSavePath savePath};< / li > * foreach ($session as $name => $value) // traverse all session variables
* < li > {@link setCookieParams cookieParams};< / li > * $session['name3'] = $value3; // set session variable 'name3'
* < li > {@link setGCProbability gcProbability};< / li > * ~~~
* < li > {@link setCookieMode cookieMode};< / li >
* < li > {@link setUseTransparentSessionID useTransparentSessionID};< / li >
* < li > {@link setTimeout timeout}.< / li >
* < / ul >
* See the corresponding setter and getter documentation for more information.
* Note, these properties must be set before the session is started.
* *
* Session can be extended to support customized session storage. * Session can be extended to support customized session storage.
* Override {@link openSession}, {@link closeSession}, {@link readSession}, * To do so, override [[useCustomStorage()]] so that it returns true, and
* {@link writeSession}, {@link destroySession} and {@link gcSession} * override these methods with the actual logic about using custom storage:
* and set [[useCustomStorage]] to true. * [[openSession()]], [[closeSession()]], [[readSession()]], [[writeSession()]],
* Then, the session data will be stored and retrieved using the above methods . * [[destroySession()]] and [[gcSession()]].
* *
* Session is a Web application component that can be accessed via * Session is a Web application component that can be accessed via
* {@link CWebApplication::getSession()} . * `Yii::$app->session` .
* *
* @property boolean $useCustomStorage Whether to use custom storage. * @property boolean $useCustomStorage read-only. Whether to use custom storage.
* @property boolean $isStarted Whether the session has started. * @property boolean $isActive Whether the session has started.
* @property string $sessionID The current session ID. * @property string $id The current session ID.
* @property string $sessio nN ame The current session name. * @property string $name The current session name.
* @property string $savePath The current session save path, defaults to '/tmp'. * @property string $savePath The current session save path, defaults to '/tmp'.
* @property array $cookieParams The session cookie parameters. * @property array $cookieParams The session cookie parameters.
* @property string $cookieMode How to use cookie to store session ID. Defaults to 'Allow'. * @property string $cookieMode How to use cookie to store session ID. Defaults to 'Allow'.
* @property float $gC Probability The probability (percentage) that the gc (garbage collection) process is started on every session initialization, defaults to 1 meaning 1% chance . * @property float $gc Probability The probability (percentage) that the gc (garbage collection) process is started on every session initialization.
* @property boolean $useTransparentSessionID Whether transparent sid support is enabled or not, defaults to false. * @property boolean $useTransparentSessionID Whether transparent sid support is enabled or not, defaults to false.
* @property integer $timeout The number of seconds after which data will be seen as 'garbage' and cleaned up, defaults to 1440 seconds. * @property integer $timeout The number of seconds after which data will be seen as 'garbage' and cleaned up, defaults to 1440 seconds.
* @property SessionIterator $iterator An iterator for traversing the session variables. * @property SessionIterator $iterator An iterator for traversing the session variables.
@ -94,11 +81,9 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* Returns a value indicating whether to use custom session storage. * Returns a value indicating whether to use custom session storage.
* To use custom session storage, override this method and return This method should be overridden to return true if custom session storage handler should be used. * This method should be overridden to return true by child classes that implement custom session storage.
* If returning true, make sure the methods {@link openSession}, {@link closeSession}, {@link readSession}, * To implement custom session storage, override these methods: [[openSession()]], [[closeSession()]],
* {@link writeSession}, {@link destroySession}, and {@link gcSession} are overridden in child * [[readSession()]], [[writeSession()]], [[destroySession()]] and [[gcSession()]].
* class, because they will be used as the callback handlers.
* The default implementation always return false.
* @return boolean whether to use custom storage. * @return boolean whether to use custom storage.
*/ */
public function getUseCustomStorage() public function getUseCustomStorage()
@ -107,24 +92,34 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
} }
/** /**
* Starts the session if it has not started yet . * Starts the session.
*/ */
public function open() public function open()
{ {
// this is available in PHP 5.4.0+
if (function_exists('session_status')) {
if (session_status() == PHP_SESSION_ACTIVE) {
return;
}
}
if ($this->getUseCustomStorage()) { if ($this->getUseCustomStorage()) {
@session_set_save_handler(array($this, 'openSession'), array($this, 'closeSession'), array($this, 'readSession'), array($this, 'writeSession'), array($this, 'destroySession'), array($this, 'gcSession')); @session_set_save_handler(
array($this, 'openSession'),
array($this, 'closeSession'),
array($this, 'readSession'),
array($this, 'writeSession'),
array($this, 'destroySession'),
array($this, 'gcSession')
);
} }
@session_start(); @session_start();
if (YII_DEBUG & & session_id() == '') {
$message = Yii::t('yii', 'Failed to start session.'); if (session_id() == '') {
if (function_exists('error_get_last')) { $error = error_get_last();
$error = error_get_last(); $message = isset($error['message']) ? $error['message'] : 'Failed to start session.';
if (isset($error['message'])) { Yii::warning($message, __CLASS__);
$message = $error['message'];
}
}
Yii::log($message, CLogger::LEVEL_WARNING, 'system.web.Session');
} }
} }
@ -152,15 +147,21 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* @return boolean whether the session has started * @return boolean whether the session has started
*/ */
public function getIsStarted () public function getIsActive ()
{ {
return session_id() !== ''; if (function_exists('session_status')) {
// available in PHP 5.4.0+
return session_status() == PHP_SESSION_ACTIVE;
} else {
// this is not very reliable
return session_id() !== '';
}
} }
/** /**
* @return string the current session ID * @return string the current session ID
*/ */
public function getSessionID() public function getId ()
{ {
return session_id(); return session_id();
} }
@ -168,16 +169,15 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* @param string $value the session ID for the current session * @param string $value the session ID for the current session
*/ */
public function setSessionID ($value) public function setId ($value)
{ {
session_id($value); session_id($value);
} }
/** /**
* Updates the current session id with a newly generated one . * Updates the current session ID with a newly generated one .
* Please refer to {@link http://php.net/session_regenerate_id} for more details. * Please refer to [[http://php.net/session_regenerate_id]] for more details.
* @param boolean $deleteOldSession Whether to delete the old associated session file or not. * @param boolean $deleteOldSession Whether to delete the old associated session file or not.
* @since 1.1.8
*/ */
public function regenerateID($deleteOldSession = false) public function regenerateID($deleteOldSession = false)
{ {
@ -187,15 +187,16 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* @return string the current session name * @return string the current session name
*/ */
public function getSession Name() public function getName()
{ {
return session_name(); return session_name();
} }
/** /**
* @param string $value the session name for the current session, must be an alphanumeric string, defaults to PHPSESSID * @param string $value the session name for the current session, must be an alphanumeric string.
* It defaults to "PHPSESSID".
*/ */
public function setSession Name($value) public function setName($value)
{ {
session_name($value); session_name($value);
} }
@ -209,16 +210,16 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
} }
/** /**
* @param string $value the current session save path * @param string $value the current session save path. This can be either a directory name or a path alias.
* @throws C Exception if the path is not a valid directory * @throws InvalidParam Exception if the path is not a valid directory
*/ */
public function setSavePath($value) public function setSavePath($value)
{ {
if (is_dir($value)) { $path = Yii::getAlias($value);
session_save_path($value); if ($path !== false & & is_dir($path)) {
session_save_path($path);
} else { } else {
throw new CException(Yii::t('yii', 'Session.savePath "{path}" is not a valid directory.', throw new InvalidParamException("Session save path is not a valid directory: $value");
array('{path}' => $value)));
} }
} }
@ -235,7 +236,8 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
* Sets the session cookie parameters. * Sets the session cookie parameters.
* The effect of this method only lasts for the duration of the script. * The effect of this method only lasts for the duration of the script.
* Call this method before the session starts. * Call this method before the session starts.
* @param array $value cookie parameters, valid keys include: lifetime, path, domain, secure. * @param array $value cookie parameters, valid keys include: lifetime, path, domain, secure and httponly.
* @throws InvalidParamException if the parameters are incomplete.
* @see http://us2.php.net/manual/en/function.session-set-cookie-params.php * @see http://us2.php.net/manual/en/function.session-set-cookie-params.php
*/ */
public function setCookieParams($value) public function setCookieParams($value)
@ -243,10 +245,10 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
$data = session_get_cookie_params(); $data = session_get_cookie_params();
extract($data); extract($data);
extract($value); extract($value);
if (isset($httponly)) { if (isset($lifetime, $path, $domain, $secure, $ httponly)) {
session_set_cookie_params($lifetime, $path, $domain, $secure, $httponly); session_set_cookie_params($lifetime, $path, $domain, $secure, $httponly);
} else { } else {
session_set_cookie_params($lifetime, $path, $domain, $secure ); throw new InvalidParamException('Please make sure these parameters are provided: lifetime, path, domain, secure and httponly.' );
} }
} }
@ -348,7 +350,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* Session open handler. * Session open handler.
* This method should be overridden if [[useCustomStorage]] is set true. * This method should be overridden if [[useCustomStorage()]] returns true.
* Do not call this method directly. * Do not call this method directly.
* @param string $savePath session save path * @param string $savePath session save path
* @param string $sessionName session name * @param string $sessionName session name
@ -361,7 +363,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* Session close handler. * Session close handler.
* This method should be overridden if [[useCustomStorage]] is set true. * This method should be overridden if [[useCustomStorage()]] returns true.
* Do not call this method directly. * Do not call this method directly.
* @return boolean whether session is closed successfully * @return boolean whether session is closed successfully
*/ */
@ -372,7 +374,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* Session read handler. * Session read handler.
* This method should be overridden if [[useCustomStorage]] is set true. * This method should be overridden if [[useCustomStorage()]] returns true.
* Do not call this method directly. * Do not call this method directly.
* @param string $id session ID * @param string $id session ID
* @return string the session data * @return string the session data
@ -384,7 +386,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* Session write handler. * Session write handler.
* This method should be overridden if [[useCustomStorage]] is set true. * This method should be overridden if [[useCustomStorage()]] returns true.
* Do not call this method directly. * Do not call this method directly.
* @param string $id session ID * @param string $id session ID
* @param string $data session data * @param string $data session data
@ -397,7 +399,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* Session destroy handler. * Session destroy handler.
* This method should be overridden if [[useCustomStorage]] is set true. * This method should be overridden if [[useCustomStorage()]] returns true.
* Do not call this method directly. * Do not call this method directly.
* @param string $id session ID * @param string $id session ID
* @return boolean whether session is destroyed successfully * @return boolean whether session is destroyed successfully
@ -409,7 +411,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
/** /**
* Session GC (garbage collection) handler. * Session GC (garbage collection) handler.
* This method should be overridden if [[useCustomStorage]] is set true. * This method should be overridden if [[useCustomStorage()]] returns true.
* Do not call this method directly. * Do not call this method directly.
* @param integer $maxLifetime the number of seconds after which data will be seen as 'garbage' and cleaned up. * @param integer $maxLifetime the number of seconds after which data will be seen as 'garbage' and cleaned up.
* @return boolean whether session is GCed successfully * @return boolean whether session is GCed successfully
Qiang Xue
12 years ago