Skip to content
This repository
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 611 lines (572 sloc) 20.083 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610
<?php
/**
* CWebUser class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2010 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/

/**
* CWebUser represents the persistent state for a Web application user.
*
* CWebUser is used as an application component whose ID is 'user'.
* Therefore, at any place one can access the user state via
* <code>Yii::app()->user</code>.
*
* CWebUser should be used together with an {@link IUserIdentity identity}
* which implements the actual authentication algorithm.
*
* A typical authentication process using CWebUser is as follows:
* <ol>
* <li>The user provides information needed for authentication.</li>
* <li>An {@link IUserIdentity identity instance} is created with the user-provided information.</li>
* <li>Call {@link IUserIdentity::authenticate} to check if the identity is valid.</li>
* <li>If valid, call {@link CWebUser::login} to login the user, and
* Redirect the user browser to {@link returnUrl}.</li>
* <li>If not valid, retrieve the error code or message from the identity
* instance and display it.</li>
* </ol>
*
* The property {@link id} and {@link name} are both unique identifiers
* for the user. The former is mainly used internally (e.g. primary key), while
* the latter is for display purpose (e.g. username). is a unique identifier for a user that is persistent
* during the whole user session. It can be a username, or something else,
* depending on the implementation of the {@link IUserIdentity identity class}.
*
* Both {@link id} and {@link name} are persistent during the user session.
* Besides, an identity may have additional persistent data which can
* be accessed by calling {@link getState}.
* Note, when {@link allowAutoLogin cookie-based authentication} is enabled,
* all these persistent data will be stored in cookie. Therefore, do not
* store password or other sensitive data in the persistent storage. Instead,
* you should store them directly in session on the server side if needed.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.web.auth
* @since 1.0
*/
class CWebUser extends CApplicationComponent implements IWebUser
{
const FLASH_KEY_PREFIX='Yii.CWebUser.flash.';
const FLASH_COUNTERS='Yii.CWebUser.flash.counters';
const STATES_VAR='__states';

/**
* @var boolean whether to enable cookie-based login. Defaults to false.
*/
public $allowAutoLogin=false;
/**
* @var string the name for a guest user. Defaults to 'Guest'.
* This is used by {@link getName} when the current user is a guest (not authenticated).
*/
public $guestName='Guest';
/**
* @var string|array the URL for login. If using array, the first element should be
* the route to the login action, and the rest name-value pairs are GET parameters
* to construct the login URL (e.g. array('/site/login')). If this property is null,
* a 403 HTTP exception will be raised instead.
* @see CController::createUrl
*/
public $loginUrl=array('/site/login');
/**
* @var array the property values (in name-value pairs) used to initialize the identity cookie.
* Any property of {@link CHttpCookie} may be initialized.
* This property is effective only when {@link allowAutoLogin} is true.
* @since 1.0.5
*/
public $identityCookie;
/**
* @var boolean whether to automatically renew the identity cookie each time a page is requested.
* Defaults to false. This property is effective only when {@link allowAutoLogin} is true.
* When this is false, the identity cookie will expire after the specified duration since the user
* is initially logged in. When this is true, the identity cookie will expire after the specified duration
* since the user visits the site the last time.
* @see allowAutoLogin
* @since 1.1.0
*/
public $autoRenewCookie=false;

private $_keyPrefix;
private $_access=array();

/**
* PHP magic method.
* This method is overriden so that persistent states can be accessed like properties.
* @param string property name
* @return mixed property value
* @since 1.0.3
*/
public function __get($name)
{
if($this->hasState($name))
return $this->getState($name);
else
return parent::__get($name);
}

/**
* PHP magic method.
* This method is overriden so that persistent states can be set like properties.
* @param string property name
* @param mixed property value
* @since 1.0.3
*/
public function __set($name,$value)
{
if($this->hasState($name))
$this->setState($name,$value);
else
parent::__set($name,$value);
}

/**
* PHP magic method.
* This method is overriden so that persistent states can also be checked for null value.
* @param string property name
* @since 1.0.3
*/
public function __isset($name)
{
if($this->hasState($name))
return $this->getState($name)!==null;
else
return parent::__isset($name);
}

/**
* PHP magic method.
* This method is overriden so that persistent states can also be unset.
* @param string property name
* @throws CException if the property is read only.
* @since 1.0.3
*/
public function __unset($name)
{
if($this->hasState($name))
$this->setState($name,null);
else
parent::__unset($name);
}

/**
* Initializes the application component.
* This method overrides the parent implementation by starting session,
* performing cookie-based authentication if enabled, and updating the flash variables.
*/
public function init()
{
parent::init();
Yii::app()->getSession()->open();
if($this->getIsGuest() && $this->allowAutoLogin)
$this->restoreFromCookie();
$this->updateFlash();
}

/**
* Logs in a user.
*
* The user identity information will be saved in storage that is
* persistent during the user session. By default, the storage is simply
* the session storage. If the duration parameter is greater than 0,
* a cookie will be sent to prepare for cookie-based login in future.
*
* Note, you have to set {@link allowAutoLogin} to true
* if you want to allow user to be authenticated based on the cookie information.
*
* @param IUserIdentity the user identity (which should already be authenticated)
* @param integer number of seconds that the user can remain in logged-in status. Defaults to 0, meaning login till the user closes the browser.
* If greater than 0, cookie-based login will be used. In this case, {@link allowAutoLogin}
* must be set true, otherwise an exception will be thrown.
*/
public function login($identity,$duration=0)
{
$this->changeIdentity($identity->getId(),$identity->getName(),$identity->getPersistentStates());

if($duration>0)
{
if($this->allowAutoLogin)
$this->saveToCookie($duration);
else
throw new CException(Yii::t('yii','{class}.allowAutoLogin must be set true in order to use cookie-based authentication.',
array('{class}'=>get_class($this))));
}
}

/**
* Logs out the current user.
* This will remove authentication-related session data.
* If the parameter is true, the whole session will be destroyed as well.
* @param boolean whether to destroy the whole session. Defaults to true. If false,
* then {@link clearStates} will be called, which removes only the data stored via {@link setState}.
* This parameter has been available since version 1.0.7. Before 1.0.7, the behavior
* is to destroy the whole session.
*/
public function logout($destroySession=true)
{
if($this->allowAutoLogin)
Yii::app()->getRequest()->getCookies()->remove($this->getStateKeyPrefix());
if($destroySession)
Yii::app()->getSession()->destroy();
else
$this->clearStates();
}

/**
* @return boolean whether the current application user is a guest.
*/
public function getIsGuest()
{
return $this->getState('__id')===null;
}

/**
* @return mixed the unique identifier for the user. If null, it means the user is a guest.
*/
public function getId()
{
return $this->getState('__id');
}

/**
* @param mixed the unique identifier for the user. If null, it means the user is a guest.
*/
public function setId($value)
{
$this->setState('__id',$value);
}

/**
* Returns the unique identifier for the user (e.g. username).
* This is the unique identifier that is mainly used for display purpose.
* @return string the user name. If the user is not logged in, this will be {@link guestName}.
*/
public function getName()
{
if(($name=$this->getState('__name'))!==null)
return $name;
else
return $this->guestName;
}

/**
* Sets the unique identifier for the user (e.g. username).
* @param string the user name.
* @see getName
*/
public function setName($value)
{
$this->setState('__name',$value);
}

/**
* Returns the URL that the user should be redirected to after successful login.
* This property is usually used by the login action. If the login is successful,
* the action should read this property and use it to redirect the user browser.
* @return string the URL that the user should be redirected to after login. Defaults to the application entry URL.
* @see loginRequired
*/
public function getReturnUrl()
{
return $this->getState('__returnUrl',Yii::app()->getRequest()->getScriptUrl());
}

/**
* @param string the URL that the user should be redirected to after login.
*/
public function setReturnUrl($value)
{
$this->setState('__returnUrl',$value);
}

/**
* Redirects the user browser to the login page.
* Before the redirection, the current URL (if it's not an AJAX url) will be
* kept in {@link returnUrl} so that the user browser may be redirected back
* to the current page after successful login. Make sure you set {@link loginUrl}
* so that the user browser can be redirected to the specified login URL after
* calling this method.
* After calling this method, the current request processing will be terminated.
*/
public function loginRequired()
{
$app=Yii::app();
$request=$app->getRequest();

if(!$request->getIsAjaxRequest())
$this->setReturnUrl($request->getUrl());

if(($url=$this->loginUrl)!==null)
{
if(is_array($url))
{
$route=isset($url[0]) ? $url[0] : $app->defaultController;
$url=$app->createUrl($route,array_splice($url,1));
}
$request->redirect($url);
}
else
throw new CHttpException(403,Yii::t('yii','Login Required'));
}

/**
* Populates the current user object with the information obtained from cookie.
* This method is used when automatic login ({@link allowAutoLogin}) is enabled.
* The user identity information is recovered from cookie.
* Sufficient security measures are used to prevent cookie data from being tampered.
* @see saveToCookie
*/
protected function restoreFromCookie()
{
$app=Yii::app();
$cookie=$app->getRequest()->getCookies()->itemAt($this->getStateKeyPrefix());
if($cookie && !empty($cookie->value) && ($data=$app->getSecurityManager()->validateData($cookie->value))!==false)
{
$data=@unserialize($data);
if(is_array($data) && isset($data[0],$data[1],$data[2],$data[3]))
{
list($id,$name,$duration,$states)=$data;
$this->changeIdentity($id,$name,$states);
if($this->autoRenewCookie)
{
$cookie->expire=time()+$duration;
$app->getRequest()->getCookies()->add($cookie->name,$cookie);
}
}
}
}

/**
* Saves necessary user data into a cookie.
* This method is used when automatic login ({@link allowAutoLogin}) is enabled.
* This method saves user ID, username, other identity states and a validation key to cookie.
* These information are used to do authentication next time when user visits the application.
* @param integer number of seconds that the user can remain in logged-in status. Defaults to 0, meaning login till the user closes the browser.
* @see restoreFromCookie
*/
protected function saveToCookie($duration)
{
$app=Yii::app();
$cookie=$this->createIdentityCookie($this->getStateKeyPrefix());
$cookie->expire=time()+$duration;
$data=array(
$this->getId(),
$this->getName(),
$duration,
$this->saveIdentityStates(),
);
$cookie->value=$app->getSecurityManager()->hashData(serialize($data));
$app->getRequest()->getCookies()->add($cookie->name,$cookie);
}

/**
* Creates a cookie to store identity information.
* @param string the cookie name
* @return CHttpCookie the cookie used to store identity information
* @since 1.0.5
*/
protected function createIdentityCookie($name)
{
$cookie=new CHttpCookie($name,'');
if(is_array($this->identityCookie))
{
foreach($this->identityCookie as $name=>$value)
$cookie->$name=$value;
}
return $cookie;
}

/**
* @return string a prefix for the name of the session variables storing user session data.
*/
public function getStateKeyPrefix()
{
if($this->_keyPrefix!==null)
return $this->_keyPrefix;
else
return $this->_keyPrefix=md5('Yii.'.get_class($this).'.'.Yii::app()->getId());
}

/**
* @param string a prefix for the name of the session variables storing user session data.
* @since 1.0.9
*/
public function setStateKeyPrefix($value)
{
$this->_keyPrefix=$value;
}

/**
* Returns the value of a variable that is stored in user session.
*
* This function is designed to be used by CWebUser descendant classes
* who want to store additional user information in user session.
* A variable, if stored in user session using {@link setState} can be
* retrieved back using this function.
*
* @param string variable name
* @param mixed default value
* @return mixed the value of the variable. If it doesn't exist in the session,
* the provided default value will be returned
* @see setState
*/
public function getState($key,$defaultValue=null)
{
$key=$this->getStateKeyPrefix().$key;
return isset($_SESSION[$key]) ? $_SESSION[$key] : $defaultValue;
}

/**
* Stores a variable in user session.
*
* This function is designed to be used by CWebUser descendant classes
* who want to store additional user information in user session.
* By storing a variable using this function, the variable may be retrieved
* back later using {@link getState}. The variable will be persistent
* across page requests during a user session.
*
* @param string variable name
* @param mixed variable value
* @param mixed default value. If $value===$defaultValue, the variable will be
* removed from the session
* @see getState
*/
public function setState($key,$value,$defaultValue=null)
{
$key=$this->getStateKeyPrefix().$key;
if($value===$defaultValue)
unset($_SESSION[$key]);
else
$_SESSION[$key]=$value;
}

/**
* Returns a value indicating whether there is a state of the specified name.
* @param string state name
* @return boolean whether there is a state of the specified name.
* @since 1.0.3
*/
public function hasState($key)
{
$key=$this->getStateKeyPrefix().$key;
return isset($_SESSION[$key]);
}

/**
* Clears all user identity information from persistent storage.
* This will remove the data stored via {@link setState}.
*/
public function clearStates()
{
$keys=array_keys($_SESSION);
$prefix=$this->getStateKeyPrefix();
$n=strlen($prefix);
foreach($keys as $key)
{
if(!strncmp($key,$prefix,$n))
unset($_SESSION[$key]);
}
}

/**
* Returns a flash message.
* A flash message is available only in the current and the next requests.
* @param string key identifying the flash message
* @param mixed value to be returned if the flash message is not available.
* @param boolean whether to delete this flash message after accessing it.
* Defaults to true. This parameter has been available since version 1.0.2.
* @return mixed the message message
*/
public function getFlash($key,$defaultValue=null,$delete=true)
{
$value=$this->getState(self::FLASH_KEY_PREFIX.$key,$defaultValue);
if($delete)
$this->setFlash($key,null);
return $value;
}

/**
* Stores a flash message.
* A flash message is available only in the current and the next requests.
* @param string key identifying the flash message
* @param mixed flash message
* @param mixed if this value is the same as the flash message, the flash message
* will be removed. (Therefore, you can use setFlash('key',null) to remove a flash message.)
*/
public function setFlash($key,$value,$defaultValue=null)
{
$this->setState(self::FLASH_KEY_PREFIX.$key,$value,$defaultValue);
$counters=$this->getState(self::FLASH_COUNTERS,array());
if($value===$defaultValue)
unset($counters[$key]);
else
$counters[$key]=0;
$this->setState(self::FLASH_COUNTERS,$counters,array());
}

/**
* @param string key identifying the flash message
* @return boolean whether the specified flash message exists
*/
public function hasFlash($key)
{
return $this->getFlash($key, null, false)!==null;
}

/**
* Changes the current user with the specified identity information.
* This method is called by {@link login} and {@link restoreFromCookie}
* when the current user needs to be populated with the corresponding
* identity information. Derived classes may override this method
* by retrieving additional user-related information. Make sure the
* parent implementation is called first.
* @param mixed a unique identifier for the user
* @param string the display name for the user
* @param array identity states
*/
protected function changeIdentity($id,$name,$states)
{
$this->setId($id);
$this->setName($name);
$this->loadIdentityStates($states);
}

/**
* Retrieves identity states from persistent storage and saves them as an array.
* @return array the identity states
*/
protected function saveIdentityStates()
{
$states=array();
foreach($this->getState(self::STATES_VAR,array()) as $name=>$dummy)
$states[$name]=$this->getState($name);
return $states;
}

/**
* Loads identity states from an array and saves them to persistent storage.
* @param array the identity states
*/
protected function loadIdentityStates($states)
{
$names=array();
if(is_array($states))
{
foreach($states as $name=>$value)
{
$this->setState($name,$value);
$names[$name]=true;
}
}
$this->setState(self::STATES_VAR,$names);
}

/**
* Updates the internal counters for flash messages.
* This method is internally used by {@link CWebApplication}
* to maintain the availability of flash messages.
*/
protected function updateFlash()
{
$counters=$this->getState(self::FLASH_COUNTERS);
if(!is_array($counters))
return;
foreach($counters as $key=>$count)
{
if($count)
{
unset($counters[$key]);
$this->setState(self::FLASH_KEY_PREFIX.$key,null);
}
else
$counters[$key]++;
}
$this->setState(self::FLASH_COUNTERS,$counters,array());
}

/**
* Performs access check for this user.
* @param string the name of the operation that need access check.
* @param array name-value pairs that would be passed to business rules associated
* with the tasks and roles assigned to the user.
* @param boolean whether to allow caching the result of access checki.
* This parameter has been available since version 1.0.5. When this parameter
* is true (default), if the access check of an operation was performed before,
* its result will be directly returned when calling this method to check the same operation.
* If this parameter is false, this method will always call {@link CAuthManager::checkAccess}
* to obtain the up-to-date access result. Note that this caching is effective
* only within the same request.
* @return boolean whether the operations can be performed by this user.
*/
public function checkAccess($operation,$params=array(),$allowCaching=true)
{
if($allowCaching && $params===array() && isset($this->_access[$operation]))
return $this->_access[$operation];
else
return $this->_access[$operation]=Yii::app()->getAuthManager()->checkAccess($operation,$this->getId(),$params);
}
}
Something went wrong with that request. Please try again.