Zend_Controller_Action的实现
Zend Framework的动作控制器需要继承Zend_Controller_Action，Zend_Controller_Action提供了动作控制器的基本功能，具体参考如下代码：
Zend_Controller_Action_Interface
<?php interface Zend_Controller_Action_Interface { /** * Class constructor * * The request and response objects should be registered with the * controller, as should be any additional optional arguments; these will be * available via {@link getRequest()}, {@link getResponse()}, and * {@link getInvokeArgs()}, respectively. * * When overriding the constructor, please consider this usage as a best * practice and ensure that each is registered appropriately; the easiest * way to do so is to simply call parent::__construct($request, $response, * $invokeArgs). * * After the request, response, and invokeArgs are set, the * {@link $_helper helper broker} is initialized. * * Finally, {@link init()} is called as the final action of * instantiation, and may be safely overridden to perform initialization * tasks; as a general rule, override {@link init()} instead of the * constructor to customize an action controller's instantiation. * * @param Zend_Controller_Request_Abstract $request * @param Zend_Controller_Response_Abstract $response * @param array $invokeArgs Any additional invocation arguments * @return void */ public function __construct(Zend_Controller_Request_Abstract $request, Zend_Controller_Response_Abstract $response, array $invokeArgs = array()); /** * Dispatch the requested action * * @param string $action Method name of action * @return void */ public function dispatch($action); }
Zend_Controller_Action
<?php require_once 'Zend/Controller/Action/HelperBroker.php'; require_once 'Zend/Controller/Action/Interface.php'; require_once 'Zend/Controller/Front.php'; abstract class Zend_Controller_Action implements Zend_Controller_Action_Interface { protected $_classMethods; protected $_delimiters; protected $_invokeArgs = array(); protected $_frontController; protected $_request = null; protected $_response = null; public $viewSuffix = 'phtml'; public $view; protected $_helper = null; public function __construct(Zend_Controller_Request_Abstract $request, Zend_Controller_Response_Abstract $response, array $invokeArgs = array()) { $this->setRequest($request) ->setResponse($response) ->_setInvokeArgs($invokeArgs); $this->_helper = new Zend_Controller_Action_HelperBroker($this); $this->init(); } public function init() { } public function initView() { if (!$this->getInvokeArg('noViewRenderer') && $this->_helper->hasHelper('viewRenderer')) { return $this->view; } require_once 'Zend/View/Interface.php'; if (isset($this->view) && ($this->view instanceof Zend_View_Interface)) { return $this->view; } $request = $this->getRequest(); $module = $request->getModuleName(); $dirs = $this->getFrontController()->getControllerDirectory(); if (empty($module) || !isset($dirs[$module])) { $module = $this->getFrontController()->getDispatcher()->getDefaultModule(); } $baseDir = dirname($dirs[$module]) . DIRECTORY_SEPARATOR . 'views'; if (!file_exists($baseDir) || !is_dir($baseDir)) { require_once 'Zend/Controller/Exception.php'; throw new Zend_Controller_Exception('Missing base view directory ("' . $baseDir . '")'); } require_once 'Zend/View.php'; $this->view = new Zend_View(array('basePath' => $baseDir)); return $this->view; } public function render($action = null, $name = null, $noController = false) { if (!$this->getInvokeArg('noViewRenderer') && $this->_helper->hasHelper('viewRenderer')) { return $this->_helper->viewRenderer->render($action, $name, $noController); } $view = $this->initView(); $script = $this->getViewScript($action, $noController); $this->getResponse()->appendBody( $view->render($script), $name ); } public function renderScript($script, $name = null) { if (!$this->getInvokeArg('noViewRenderer') && $this->_helper->hasHelper('viewRenderer')) { return $this->_helper->viewRenderer->renderScript($script, $name); } $view = $this->initView(); $this->getResponse()->appendBody( $view->render($script), $name ); } public function getViewScript($action = null, $noController = null) { if (!$this->getInvokeArg('noViewRenderer') && $this->_helper->hasHelper('viewRenderer')) { $viewRenderer = $this->_helper->getHelper('viewRenderer'); if (null !== $noController) { $viewRenderer->setNoController($noController); } return $viewRenderer->getViewScript($action); } $request = $this->getRequest(); if (null === $action) { $action = $request->getActionName(); } elseif (!is_string($action)) { require_once 'Zend/Controller/Exception.php'; throw new Zend_Controller_Exception('Invalid action specifier for view render'); } if (null === $this->_delimiters) { $dispatcher = Zend_Controller_Front::getInstance()->getDispatcher(); $wordDelimiters = $dispatcher->getWordDelimiter(); $pathDelimiters = $dispatcher->getPathDelimiter(); $this->_delimiters = array_unique(array_merge($wordDelimiters, (array) $pathDelimiters)); } $action = str_replace($this->_delimiters, '-', $action); $script = $action . '.' . $this->viewSuffix; if (!$noController) { $controller = $request->getControllerName(); $controller = str_replace($this->_delimiters, '-', $controller); $script = $controller . DIRECTORY_SEPARATOR . $script; } return $script; } public function getRequest() { return $this->_request; } public function setRequest(Zend_Controller_Request_Abstract $request) { $this->_request = $request; return $this; } public function getResponse() { return $this->_response; } public function setResponse(Zend_Controller_Response_Abstract $response) { $this->_response = $response; return $this; } protected function _setInvokeArgs(array $args = array()) { $this->_invokeArgs = $args; return $this; } public function getInvokeArgs() { return $this->_invokeArgs; } public function getInvokeArg($key) { if (isset($this->_invokeArgs[$key])) { return $this->_invokeArgs[$key]; } return null; } public function getHelper($helperName) { return $this->_helper->{$helperName}; } public function getHelperCopy($helperName) { return clone $this->_helper->{$helperName}; } public function setFrontController(Zend_Controller_Front $front) { $this->_frontController = $front; return $this; } public function getFrontController() { // Used cache version if found if (null !== $this->_frontController) { return $this->_frontController; } // Grab singleton instance, if class has been loaded if (class_exists('Zend_Controller_Front')) { $this->_frontController = Zend_Controller_Front::getInstance(); return $this->_frontController; } // Throw exception in all other cases require_once 'Zend/Controller/Exception.php'; throw new Zend_Controller_Exception('Front controller class has not been loaded'); } public function preDispatch() { } public function postDispatch() { } public function __call($methodName, $args) { require_once 'Zend/Controller/Action/Exception.php'; if ('Action' == substr($methodName, -6)) { $action = substr($methodName, 0, strlen($methodName) - 6); throw new Zend_Controller_Action_Exception(sprintf('Action "%s" does not exist and was not trapped in __call()', $action), 404); } throw new Zend_Controller_Action_Exception(sprintf('Method "%s" does not exist and was not trapped in __call()', $methodName), 500); } public function dispatch($action) { // Notify helpers of action preDispatch state $this->_helper->notifyPreDispatch(); $this->preDispatch(); if ($this->getRequest()->isDispatched()) { if (null === $this->_classMethods) { $this->_classMethods = get_class_methods($this); } // If pre-dispatch hooks introduced a redirect then stop dispatch // @see ZF-7496 if (!($this->getResponse()->isRedirect())) { // preDispatch() didn't change the action, so we can continue if ($this->getInvokeArg('useCaseSensitiveActions') || in_array($action, $this->_classMethods)) { if ($this->getInvokeArg('useCaseSensitiveActions')) { trigger_error('Using case sensitive actions without word separators is deprecated; please do not rely on this "feature"'); } $this->$action(); } else { $this->__call($action, array()); } } $this->postDispatch(); } // whats actually important here is that this action controller is // shutting down, regardless of dispatching; notify the helpers of this // state $this->_helper->notifyPostDispatch(); } public function run(Zend_Controller_Request_Abstract $request = null, Zend_Controller_Response_Abstract $response = null) { if (null !== $request) { $this->setRequest($request); } else { $request = $this->getRequest(); } if (null !== $response) { $this->setResponse($response); } $action = $request->getActionName(); if (empty($action)) { $action = 'index'; } $action = $action . 'Action'; $request->setDispatched(true); $this->dispatch($action); return $this->getResponse(); } protected function _getParam($paramName, $default = null) { $value = $this->getRequest()->getParam($paramName); if ((null === $value || '' === $value) && (null !== $default)) { $value = $default; } return $value; } protected function _setParam($paramName, $value) { $this->getRequest()->setParam($paramName, $value); return $this; } protected function _hasParam($paramName) { return null !== $this->getRequest()->getParam($paramName); } protected function _getAllParams() { return $this->getRequest()->getParams(); } final protected function _forward($action, $controller = null, $module = null, array $params = null) { $request = $this->getRequest(); if (null !== $params) { $request->setParams($params); } if (null !== $controller) { $request->setControllerName($controller); // Module should only be reset if controller has been specified if (null !== $module) { $request->setModuleName($module); } } $request->setActionName($action) ->setDispatched(false); } protected function _redirect($url, array $options = array()) { $this->_helper->redirector->gotoUrl($url, $options); } }
Zend_Controller_Action提供了动作和视图的render功能，以及注册请求和响应对象，常用助手等等。
动作控制器的常用方法
在动作控制器中常用的方法和属性如下：
$this->_helper主要完成助手的相关操作例如：