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718 lines
21 KiB
PHP
718 lines
21 KiB
PHP
<?php
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/**
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* CApplication class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.yiiframework.com/
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* @copyright Copyright © 2008-2009 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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/**
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* CApplication is the base class for all application classes.
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*
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* An application serves as the global context that the user request
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* is being processed. It manages a set of application components that
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* provide specific functionalities to the whole application.
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*
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* The core application components provided by CApplication are the following:
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* <ul>
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* <li>{@link getErrorHandler errorHandler}: handles PHP errors and
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* uncaught exceptions. This application component is dynamically loaded when needed.</li>
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* <li>{@link getSecurityManager securityManager}: provides security-related
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* services, such as hashing, encryption. This application component is dynamically
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* loaded when needed.</li>
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* <li>{@link getStatePersister statePersister}: provides global state
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* persistence method. This application component is dynamically loaded when needed.</li>
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* <li>{@link getCache cache}: provides caching feature. This application component is
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* disabled by default.</li>
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* <li>{@link getMessages messages}: provides the message source for translating
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* application messages. This application component is dynamically loaded when needed.</li>
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* <li>{@link getCoreMessages coreMessages}: provides the message source for translating
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* Yii framework messages. This application component is dynamically loaded when needed.</li>
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* </ul>
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*
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* CApplication will undergo the following lifecycles when processing a user request:
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* <ol>
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* <li>load application configuration;</li>
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* <li>set up class autoloader and error handling;</li>
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* <li>load static application components;</li>
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* <li>{@link onBeginRequest}: preprocess the user request;</li>
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* <li>{@link processRequest}: process the user request;</li>
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* <li>{@link onEndRequest}: postprocess the user request;</li>
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* </ol>
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*
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* Starting from lifecycle 3, if a PHP error or an uncaught exception occurs,
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* the application will switch to its error handling logic and jump to step 6 afterwards.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id: CApplication.php 1301 2009-08-07 13:19:55Z qiang.xue $
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* @package system.base
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* @since 1.0
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*/
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abstract class CApplication extends CModule
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{
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/**
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* @var string the application name. Defaults to 'My Application'.
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*/
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public $name='My Application';
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/**
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* @var string the charset currently used for the application. Defaults to 'UTF-8'.
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*/
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public $charset='UTF-8';
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/**
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* @var string the language that the application is written in. This mainly refers to
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* the language that the messages and view files are in. Defaults to 'en_us' (US English).
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*/
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public $sourceLanguage='en_us';
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private $_id;
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private $_basePath;
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private $_runtimePath;
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private $_extensionPath;
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private $_globalState;
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private $_stateChanged;
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private $_ended=false;
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private $_language;
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/**
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* Processes the request.
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* This is the place where the actual request processing work is done.
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* Derived classes should override this method.
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*/
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abstract public function processRequest();
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/**
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* Constructor.
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* @param mixed application configuration.
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* If a string, it is treated as the path of the file that contains the configuration;
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* If an array, it is the actual configuration information.
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* Please make sure you specify the {@link getBasePath basePath} property in the configuration,
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* which should point to the directory containing all application logic, template and data.
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* If not, the directory will be defaulted to 'protected'.
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*/
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public function __construct($config=null)
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{
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Yii::setApplication($this);
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// set basePath at early as possible to avoid trouble
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if(is_string($config))
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$config=require($config);
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if(isset($config['basePath']))
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{
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$this->setBasePath($config['basePath']);
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unset($config['basePath']);
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}
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else
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$this->setBasePath('protected');
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Yii::setPathOfAlias('application',$this->getBasePath());
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Yii::setPathOfAlias('webroot',dirname($_SERVER['SCRIPT_FILENAME']));
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Yii::setPathOfAlias('extensions',dirname($_SERVER['SCRIPT_FILENAME']).DIRECTORY_SEPARATOR.'extensions');
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$this->preinit();
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$this->initSystemHandlers();
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$this->registerCoreComponents();
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$this->configure($config);
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$this->attachBehaviors($this->behaviors);
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$this->preloadComponents();
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$this->init();
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}
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/**
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* Runs the application.
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* This method loads static application components. Derived classes usually overrides this
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* method to do more application-specific tasks.
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* Remember to call the parent implementation so that static application components are loaded.
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*/
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public function run()
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{
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$this->onBeginRequest(new CEvent($this));
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$this->processRequest();
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$this->onEndRequest(new CEvent($this));
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}
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/**
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* Terminates the application.
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* This method replaces PHP's exit() function by calling
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* {@link onEndRequest} before exiting.
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* @param integer exit status (value 0 means normal exit while other values mean abnormal exit).
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*/
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public function end($status=0)
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{
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$this->onEndRequest(new CEvent($this));
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exit($status);
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}
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/**
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* Raised right BEFORE the application processes the request.
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* @param CEvent the event parameter
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*/
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public function onBeginRequest($event)
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{
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$this->raiseEvent('onBeginRequest',$event);
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}
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/**
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* Raised right AFTER the application processes the request.
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* @param CEvent the event parameter
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*/
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public function onEndRequest($event)
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{
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if(!$this->_ended)
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{
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$this->_ended=true;
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$this->raiseEvent('onEndRequest',$event);
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}
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}
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/**
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* @return string a unique identifier for the application.
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*/
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public function getId()
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{
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if($this->_id!==null)
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return $this->_id;
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else
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return $this->_id=sprintf('%x',crc32($this->getBasePath().$this->name));
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}
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/**
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* @param string a unique identifier for the application.
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*/
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public function setId($id)
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{
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$this->_id=$id;
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}
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/**
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* @return string the root directory of the application. Defaults to 'protected'.
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*/
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public function getBasePath()
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{
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return $this->_basePath;
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}
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/**
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* Sets the root directory of the application.
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* This method can only be invoked at the begin of the constructor.
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* @param string the root directory of the application.
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* @throws CException if the directory does not exist.
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*/
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public function setBasePath($path)
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{
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if(($this->_basePath=realpath($path))===false || !is_dir($this->_basePath))
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throw new CException(Yii::t('yii','Application base path "{path}" is not a valid directory.',
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array('{path}'=>$path)));
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}
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/**
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* @return string the directory that stores runtime files. Defaults to 'protected/runtime'.
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*/
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public function getRuntimePath()
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{
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if($this->_runtimePath!==null)
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return $this->_runtimePath;
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else
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{
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$this->setRuntimePath($this->getBasePath().DIRECTORY_SEPARATOR.'runtime');
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return $this->_runtimePath;
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}
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}
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/**
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* @param string the directory that stores runtime files.
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* @throws CException if the directory does not exist or is not writable
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*/
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public function setRuntimePath($path)
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{
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if(($runtimePath=realpath($path))===false || !is_dir($runtimePath) || !is_writable($runtimePath))
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throw new CException(Yii::t('yii','Application runtime path "{path}" is not valid. Please make sure it is a directory writable by the Web server process.',
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array('{path}'=>$path)));
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$this->_runtimePath=$runtimePath;
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}
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/**
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* Returns the root directory that holds all third-party extensions.
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* @return string the directory that contains all extensions. Defaults to the 'extensions' directory under 'protected'.
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*/
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public function getExtensionPath()
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{
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return Yii::getPathOfAlias('ext');
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}
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/**
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* @param string the directory that contains all third-party extensions.
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*/
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public function setExtensionPath($path)
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{
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if(($extensionPath=realpath($path))===false || !is_dir($extensionPath))
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throw new CException(Yii::t('yii','Extension path "{path}" does not exist.',
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array('{path}'=>$path)));
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Yii::setPathOfAlias('ext',$extensionPath);
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}
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/**
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* @return string the language that the user is using and the application should be targeted to.
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* Defaults to the {@link sourceLanguage source language}.
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*/
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public function getLanguage()
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{
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return $this->_language===null ? $this->sourceLanguage : $this->_language;
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}
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/**
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* Specifies which language the application is targeted to.
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*
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* This is the language that the application displays to end users.
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* If set null, it uses the {@link sourceLanguage source language}.
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*
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* Unless your application needs to support multiple languages, you should always
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* set this language to null to maximize the application's performance.
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* @param string the user language (e.g. 'en_US', 'zh_CN').
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* If it is null, the {@link sourceLanguage} will be used.
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*/
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public function setLanguage($language)
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{
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$this->_language=$language;
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}
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/**
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* Returns the localized version of a specified file.
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*
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* The searching is based on the specified language code. In particular,
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* a file with the same name will be looked for under the subdirectory
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* named as the locale ID. For example, given the file "path/to/view.php"
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* and locale ID "zh_cn", the localized file will be looked for as
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* "path/to/zh_cn/view.php". If the file is not found, the original file
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* will be returned.
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*
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* For consistency, it is recommended that the locale ID is given
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* in lower case and in the format of LanguageID_RegionID (e.g. "en_us").
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*
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* @param string the original file
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* @param string the language that the original file is in. If null, the application {@link sourceLanguage source language} is used.
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* @param string the desired language that the file should be localized to. If null, the {@link getLanguage application language} will be used.
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* @return string the matching localized file. The original file is returned if no localized version is found
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* or if source language is the same as the desired language.
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*/
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public function findLocalizedFile($srcFile,$srcLanguage=null,$language=null)
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{
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if($srcLanguage===null)
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$srcLanguage=$this->sourceLanguage;
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if($language===null)
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$language=$this->getLanguage();
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if($language===$srcLanguage)
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return $srcFile;
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$desiredFile=dirname($srcFile).DIRECTORY_SEPARATOR.$language.DIRECTORY_SEPARATOR.basename($srcFile);
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return is_file($desiredFile) ? $desiredFile : $srcFile;
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}
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/**
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* @param string locale ID (e.g. en_US). If null, the {@link getLanguage application language ID} will be used.
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* @return CLocale the locale instance
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*/
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public function getLocale($localeID=null)
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{
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return CLocale::getInstance($localeID===null?$this->getLanguage():$localeID);
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}
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/**
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* @return CNumberFormatter the locale-dependent number formatter.
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* The current {@link getLocale application locale} will be used.
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*/
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public function getNumberFormatter()
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{
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return $this->getLocale()->getNumberFormatter();
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}
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/**
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* @return CDateFormatter the locale-dependent date formatter.
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* The current {@link getLocale application locale} will be used.
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*/
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public function getDateFormatter()
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{
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return $this->getLocale()->getDateFormatter();
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}
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/**
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* @return CDbConnection the database connection
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*/
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public function getDb()
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{
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return $this->getComponent('db');
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}
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/**
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* @return CErrorHandler the error handler application component.
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*/
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public function getErrorHandler()
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{
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return $this->getComponent('errorHandler');
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}
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/**
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* @return CSecurityManager the security manager application component.
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*/
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public function getSecurityManager()
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{
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return $this->getComponent('securityManager');
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}
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/**
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* @return CStatePersister the state persister application component.
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*/
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public function getStatePersister()
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{
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return $this->getComponent('statePersister');
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}
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/**
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* @return CCache the cache application component. Null if the component is not enabled.
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*/
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public function getCache()
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{
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return $this->getComponent('cache');
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}
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/**
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* @return CPhpMessageSource the core message translations
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*/
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public function getCoreMessages()
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{
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return $this->getComponent('coreMessages');
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}
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/**
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* @return CMessageSource the application message translations
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*/
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public function getMessages()
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{
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return $this->getComponent('messages');
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}
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/**
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* Returns a global value.
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*
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* A global value is one that is persistent across users sessions and requests.
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* @param string the name of the value to be returned
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* @param mixed the default value. If the named global value is not found, this will be returned instead.
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* @return mixed the named global value
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* @see setGlobalState
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*/
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public function getGlobalState($key,$defaultValue=null)
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{
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if($this->_globalState===null)
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$this->loadGlobalState();
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if(isset($this->_globalState[$key]))
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return $this->_globalState[$key];
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else
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return $defaultValue;
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}
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/**
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* Sets a global value.
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*
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* A global value is one that is persistent across users sessions and requests.
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* Make sure that the value is serializable and unserializable.
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* @param string the name of the value to be saved
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* @param mixed the global value to be saved. It must be serializable.
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* @param mixed the default value. If the named global value is the same as this value, it will be cleared from the current storage.
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* @see getGlobalState
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*/
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public function setGlobalState($key,$value,$defaultValue=null)
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{
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if($this->_globalState===null)
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$this->loadGlobalState();
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$this->_stateChanged=true;
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if($value===$defaultValue)
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unset($this->_globalState[$key]);
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else
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$this->_globalState[$key]=$value;
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}
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/**
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* Clears a global value.
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*
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* The value cleared will no longer be available in this request and the following requests.
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* @param string the name of the value to be cleared
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*/
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public function clearGlobalState($key)
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{
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if($this->_globalState===null)
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$this->loadGlobalState();
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if(isset($this->_globalState[$key]))
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{
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$this->_stateChanged=true;
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unset($this->_globalState[$key]);
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}
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}
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/**
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* Loads the global state data from persistent storage.
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* @see getStatePersister
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* @throws CException if the state persister is not available
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*/
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protected function loadGlobalState()
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{
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$persister=$this->getStatePersister();
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if(($this->_globalState=$persister->load())===null)
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$this->_globalState=array();
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$this->_stateChanged=false;
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$this->attachEventHandler('onEndRequest',array($this,'saveGlobalState'));
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}
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/**
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* Saves the global state data into persistent storage.
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* @see getStatePersister
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* @throws CException if the state persister is not available
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*/
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protected function saveGlobalState()
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{
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if($this->_stateChanged)
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{
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$persister=$this->getStatePersister();
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$this->_stateChanged=false;
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$persister->save($this->_globalState);
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}
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}
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/**
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* Handles uncaught PHP exceptions.
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*
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* This method is implemented as a PHP exception handler. It requires
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* that constant YII_ENABLE_EXCEPTION_HANDLER be defined true.
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*
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* This method will first raise an {@link onException} event.
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* If the exception is not handled by any event handler, it will call
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* {@link getErrorHandler errorHandler} to process the exception.
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*
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* The application will be terminated by this method.
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*
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* @param Exception exception that is not caught
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*/
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public function handleException($exception)
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{
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// disable error capturing to avoid recursive errors
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restore_error_handler();
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restore_exception_handler();
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$category='exception.'.get_class($exception);
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if($exception instanceof CHttpException)
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$category.='.'.$exception->statusCode;
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$message=(string)$exception;
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if(isset($_SERVER['REQUEST_URI']))
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$message.=' REQUEST_URI='.$_SERVER['REQUEST_URI'];
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Yii::log($message,CLogger::LEVEL_ERROR,$category);
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try
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{
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$event=new CExceptionEvent($this,$exception);
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$this->onException($event);
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if(!$event->handled)
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{
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// try an error handler
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if(($handler=$this->getErrorHandler())!==null)
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$handler->handle($event);
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else
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$this->displayException($exception);
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}
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}
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catch(Exception $e)
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{
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$this->displayException($e);
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}
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$this->end(1);
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}
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/**
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* Handles PHP execution errors such as warnings, notices.
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*
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* This method is implemented as a PHP error handler. It requires
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* that constant YII_ENABLE_ERROR_HANDLER be defined true.
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*
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* This method will first raise an {@link onError} event.
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* If the error is not handled by any event handler, it will call
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* {@link getErrorHandler errorHandler} to process the error.
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*
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* The application will be terminated by this method.
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*
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* @param integer the level of the error raised
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* @param string the error message
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|
* @param string the filename that the error was raised in
|
|
* @param integer the line number the error was raised at
|
|
*/
|
|
public function handleError($code,$message,$file,$line)
|
|
{
|
|
if($code & error_reporting())
|
|
{
|
|
// disable error capturing to avoid recursive errors
|
|
restore_error_handler();
|
|
restore_exception_handler();
|
|
|
|
$log="$message ($file:$line)\nStack trace:\n";
|
|
$trace=debug_backtrace();
|
|
// skip the first 3 stacks as they do not tell the error position
|
|
if(count($trace)>3)
|
|
$trace=array_slice($trace,3);
|
|
foreach($trace as $i=>$t)
|
|
{
|
|
if(!isset($t['file']))
|
|
$t['file']='unknown';
|
|
if(!isset($t['line']))
|
|
$t['line']=0;
|
|
if(!isset($t['function']))
|
|
$t['function']='unknown';
|
|
$log.="#$i {$t['file']}({$t['line']}): ";
|
|
if(isset($t['object']) && is_object($t['object']))
|
|
$log.=get_class($t['object']).'->';
|
|
$log.="{$t['function']}()\n";
|
|
}
|
|
if(isset($_SERVER['REQUEST_URI']))
|
|
$log.='REQUEST_URI='.$_SERVER['REQUEST_URI'];
|
|
Yii::log($log,CLogger::LEVEL_ERROR,'php');
|
|
|
|
try
|
|
{
|
|
$event=new CErrorEvent($this,$code,$message,$file,$line);
|
|
$this->onError($event);
|
|
if(!$event->handled)
|
|
{
|
|
// try an error handler
|
|
if(($handler=$this->getErrorHandler())!==null)
|
|
$handler->handle($event);
|
|
else
|
|
$this->displayError($code,$message,$file,$line);
|
|
}
|
|
}
|
|
catch(Exception $e)
|
|
{
|
|
$this->displayException($e);
|
|
}
|
|
$this->end(1);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Raised when an uncaught PHP exception occurs.
|
|
*
|
|
* An event handler can set the {@link CExceptionEvent::handled handled}
|
|
* property of the event parameter to be true to indicate no further error
|
|
* handling is needed. Otherwise, the {@link getErrorHandler errorHandler}
|
|
* application component will continue processing the error.
|
|
*
|
|
* @param CExceptionEvent event parameter
|
|
*/
|
|
public function onException($event)
|
|
{
|
|
$this->raiseEvent('onException',$event);
|
|
}
|
|
|
|
/**
|
|
* Raised when a PHP execution error occurs.
|
|
*
|
|
* An event handler can set the {@link CErrorEvent::handled handled}
|
|
* property of the event parameter to be true to indicate no further error
|
|
* handling is needed. Otherwise, the {@link getErrorHandler errorHandler}
|
|
* application component will continue processing the error.
|
|
*
|
|
* @param CErrorEvent event parameter
|
|
*/
|
|
public function onError($event)
|
|
{
|
|
$this->raiseEvent('onError',$event);
|
|
}
|
|
|
|
/**
|
|
* Displays the captured PHP error.
|
|
* This method displays the error in HTML when there is
|
|
* no active error handler.
|
|
* @param integer error code
|
|
* @param string error message
|
|
* @param string error file
|
|
* @param string error line
|
|
*/
|
|
public function displayError($code,$message,$file,$line)
|
|
{
|
|
if(YII_DEBUG)
|
|
{
|
|
echo "<h1>PHP Error [$code]</h1>\n";
|
|
echo "<p>$message ($file:$line)</p>\n";
|
|
echo '<pre>';
|
|
debug_print_backtrace();
|
|
echo '</pre>';
|
|
}
|
|
else
|
|
{
|
|
echo "<h1>PHP Error [$code]</h1>\n";
|
|
echo "<p>$message</p>\n";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Displays the uncaught PHP exception.
|
|
* This method displays the exception in HTML when there is
|
|
* no active error handler.
|
|
* @param Exception the uncaught exception
|
|
*/
|
|
public function displayException($exception)
|
|
{
|
|
if(YII_DEBUG)
|
|
{
|
|
echo '<h1>'.get_class($exception)."</h1>\n";
|
|
echo '<p>'.$exception->getMessage().' ('.$exception->getFile().':'.$exception->getLine().')</p>';
|
|
echo '<pre>'.$exception->getTraceAsString().'</pre>';
|
|
}
|
|
else
|
|
{
|
|
echo '<h1>'.get_class($exception)."</h1>\n";
|
|
echo '<p>'.$exception->getMessage().'</p>';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initializes the class autoloader and error handlers.
|
|
*/
|
|
protected function initSystemHandlers()
|
|
{
|
|
if(YII_ENABLE_EXCEPTION_HANDLER)
|
|
set_exception_handler(array($this,'handleException'));
|
|
if(YII_ENABLE_ERROR_HANDLER)
|
|
set_error_handler(array($this,'handleError'),error_reporting());
|
|
}
|
|
|
|
/**
|
|
* Registers the core application components.
|
|
* @see setComponents
|
|
*/
|
|
protected function registerCoreComponents()
|
|
{
|
|
$components=array(
|
|
'coreMessages'=>array(
|
|
'class'=>'CPhpMessageSource',
|
|
'language'=>'en_us',
|
|
'basePath'=>YII_PATH.DIRECTORY_SEPARATOR.'messages',
|
|
),
|
|
'db'=>array(
|
|
'class'=>'CDbConnection',
|
|
),
|
|
'messages'=>array(
|
|
'class'=>'CPhpMessageSource',
|
|
),
|
|
'errorHandler'=>array(
|
|
'class'=>'CErrorHandler',
|
|
),
|
|
'securityManager'=>array(
|
|
'class'=>'CSecurityManager',
|
|
),
|
|
'statePersister'=>array(
|
|
'class'=>'CStatePersister',
|
|
),
|
|
);
|
|
|
|
$this->setComponents($components);
|
|
}
|
|
}
|