15. Zend 路由

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1. zend1\public\index.php:26

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2. zend1\library\Zend\Application.php:366

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3. zend1\library\Zend\Application\Bootstrap\Bootstrap.php:97

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4. zend1\library\Zend\Controller\Front.php:954
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5. zend1\library\Zend\Controller\Dispatcher\Standard.php:289
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6.Zend1\library\Zend\Controller\Action.php:513
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7.Zend1\application\controllers\TestController.php
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public function dispatch(Zend_Controller_Request_Abstract $request = null, Zend_Controller_Response_Abstract $response = null)    {        if (!$this->getParam('noErrorHandler') && !$this->_plugins->hasPlugin('Zend_Controller_Plugin_ErrorHandler')) {            // Register with stack index of 100            require_once 'Zend/Controller/Plugin/ErrorHandler.php';            $this->_plugins->registerPlugin(new Zend_Controller_Plugin_ErrorHandler(), 100);        }        if (!$this->getParam('noViewRenderer') && !Zend_Controller_Action_HelperBroker::hasHelper('viewRenderer')) {            require_once 'Zend/Controller/Action/Helper/ViewRenderer.php';            Zend_Controller_Action_HelperBroker::getStack()->offsetSet(-80, new Zend_Controller_Action_Helper_ViewRenderer());        }        /**         * Instantiate default request object (HTTP version) if none provided         */        if (null !== $request) {            $this->setRequest($request);        } elseif ((null === $request) && (null === ($request = $this->getRequest()))) {            require_once 'Zend/Controller/Request/Http.php';            $request = new Zend_Controller_Request_Http();            $this->setRequest($request);        }        /**         * Set base URL of request object, if available         */        if (is_callable(array($this->_request, 'setBaseUrl'))) {            if (null !== $this->_baseUrl) {                $this->_request->setBaseUrl($this->_baseUrl);            }        }        /**         * Instantiate default response object (HTTP version) if none provided         */        if (null !== $response) {            $this->setResponse($response);        } elseif ((null === $this->_response) && (null === ($this->_response = $this->getResponse()))) {            require_once 'Zend/Controller/Response/Http.php';            $response = new Zend_Controller_Response_Http();            $this->setResponse($response);        }        /**         * Register request and response objects with plugin broker         */        $this->_plugins             ->setRequest($this->_request)             ->setResponse($this->_response);        /**         * Initialize router         */        $router = $this->getRouter();        $router->setParams($this->getParams());        /**         * Initialize dispatcher         */        $dispatcher = $this->getDispatcher();        $dispatcher->setParams($this->getParams())                   ->setResponse($this->_response);        // Begin dispatch        try {            /**             * Route request to controller/action, if a router is provided             */            /**            * Notify plugins of router startup            */            $this->_plugins->routeStartup($this->_request);            try {            // 路由器主要负责解析一个请求并且决定什么module、controller、action被请求，并把解析的 URI 放入 $request 对象中                $router->route($this->_request);            }  catch (Exception $e) {                if ($this->throwExceptions()) {                    throw $e;                }                $this->_response->setException($e);            }            /**            * Notify plugins of router completion            */            $this->_plugins->routeShutdown($this->_request);            /**             * Notify plugins of dispatch loop startup             */            $this->_plugins->dispatchLoopStartup($this->_request);            /**             *  Attempt to dispatch the controller/action. If the $this->_request             *  indicates that it needs to be dispatched, move to the next             *  action in the request.             */            do {            // 派遣开始时，这是为 true,dispatcher 找到方法名时，也设置为 true，标志派遣结束                $this->_request->setDispatched(true);                /**                 * Notify plugins of dispatch startup                 */                $this->_plugins->preDispatch($this->_request);                /**                 * Skip requested action if preDispatch() has reset it                 */                if (!$this->_request->isDispatched()) {                    continue;                }                /**                 * Dispatch request                 */                try {                    $dispatcher->dispatch($this->_request, $this->_response);                } catch (Exception $e) {                    if ($this->throwExceptions()) {                        throw $e;                    }                    $this->_response->setException($e);                }                /**                 * Notify plugins of dispatch completion                 */                $this->_plugins->postDispatch($this->_request);            } while (!$this->_request->isDispatched());//如果为 true 派遣结束        } catch (Exception $e) {            if ($this->throwExceptions()) {                throw $e;            }            $this->_response->setException($e);        }        /**         * Notify plugins of dispatch loop completion         */        try {            $this->_plugins->dispatchLoopShutdown();        } catch (Exception $e) {            if ($this->throwExceptions()) {                throw $e;            }            $this->_response->setException($e);        }        if ($this->returnResponse()) {            return $this->_response;        }        $this->_response->sendResponse();    }

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该循环大体过程是：

       a.前端控制器开始派遣循环　　　　b.前端控制器调用派遣器　　　　c.派遣器获取Request object请求对象，并分析它　　　　d.派遣器从请求对象中找到对应的Action Controller动作控制器名、　　　　e.派遣器尝试加载该动作控制器类　　　　f.动作控制器类加载成功，派遣器实例化动作控制器类　　　　g.派遣器器从请求对象中找到对应的Action动作名　　　　h.派遣器将派遣标志设为true，标志着派遣完成　　　　i.派遣器开始派遣动作控制器类中的Action方法　　　　j.派遣动作完成，派遣器检测请求对象Request object派遣完成标识是否为false，如果是false则表示还有派遣没有完成，派遣器就再次进入派遣循环过程中；

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