本文实例讲述了Zend Framework动作助手Redirector用法。分享给大家供大家参考,具体如下:
Redirector 提供另一种实现方式,帮助程序重定向到内部或者外部页面;
转向器(Redirector)助手让你使用一个转向器对象帮助程序重定向到新的URL。与_redirect()方法相比,它具有多项优势。例如能够在转向器对象中预先配置整个站点的行为,或者使用与Zend_Controller_Action::_forward()相似的gotoSimple($action, $controller, $module, $params)接口。
转向器拥有影响重定向行为的大量方法:setCode() 设置重定向过程中使用的HTTP响应码。
setExit() 在重定向后强制执行exit()方法。默认已设定。
setGotoSimple()设置默认的URL,当没有提供参数给gotoSimple()方法时转向该URL。可以使用类似Zend_Controller_Action::_forward()的API:setGotoSimple($action, $controller = null, $module = null, array $params = array());
setGotoRoute()设置基于一个注册路由器的URL。通过传入一个键/值数组和一个路由器名,它将根据路由器的类型和定义来组织URL。
setGotoUrl()设置默认的URL,当没有参数传入gotoUrl(),将使用该URL。接受单个URL字符串。
setPrependBase()在setGotoUrl()、gotoUrl()或者gotoUrlAndExit()指定的URL前面,加入请求对象的基地址(base URL)。
setUseAbsoluteUri()强制转向器在重定向时使用绝对的URI。当该选项设定后,将使用$_SERVER["HTTP_HOST"]、 $_SERVER["SERVER_PORT"]和 $_SERVER["HTTPS"]以及重定向方法指定的URL,来形成一个完整的URI。该选项目前默认关闭,将来的版本可能会默认开启。
此外,转向器中还有大量方法来执行实际的重定向。
gotoSimple()使用setGotoSimple()(类似_forward()的API)来构建URL并执行重定向。
gotoRoute()使用setGotoRoute()(路由组装route-assembly)来构建URL并执行重定向。
gotoUrl()使用setGotoUrl() URL字符串)来构造URL并执行重定向。
最后,你可以在任何时刻使用getRedirectUrl()确定当前的重定向URL。
基础用例Example #5 设定选项
这个例子改变了几个选项,包括设定重定向时使用的HTTP状态码为303,重定向时不默认退出,以及定义了默认的URL供重定向使用。
class SomeController extends Zend_Controller_Action{/** * Redirector - defined for code completion * * @var Zend_Controller_Action_Helper_Redirector */protected $_redirector = null;public function init(){$this->_redirector = $this->_helper->getHelper("Redirector");// Set the default options for the redirector// Since the object is registered in the helper broker, these// become relevant for all actions from this point forward$this->_redirector->setCode(303) ->setExit(false) ->setGotoSimple("this-action", "some-controller");}public function myAction(){/* do some stuff */// Redirect to a previously registered URL, and force an exit// to occur when done:$this->_redirector->redirectAndExit();return; // never reached}}Example #6 使用默认设定
这个例子假定使用默认设定,也就意味着任何重定向将导致立即退出。
// ALTERNATIVE EXAMPLEclass AlternativeController extends Zend_Controller_Action{/** * Redirector - defined for code completion * * @var Zend_Controller_Action_Helper_Redirector */protected $_redirector = null;public function init(){$this->_redirector = $this->_helper->getHelper("Redirector");}public function myAction(){/* do some stuff */$this->_redirector->gotoUrl("/my-controller/my-action/param1/test/param2/test2");return; // never reached since default is to goto and exit}}Example #7 使用goto()的_forward()API
gotoSimple()"s API 模拟了Zend_Controller_Action::_forward()。主要的不同在于它通过传入的参数构造URL,使用默认路由器的默认格式:module/:controller/:action/*。然后重定向而不是继续动作链循环。
class ForwardController extends Zend_Controller_Action{/** * Redirector - defined for code completion * * @var Zend_Controller_Action_Helper_Redirector */protected $_redirector = null;public function init(){$this->_redirector = $this->_helper->getHelper("Redirector");}public function myAction(){/* do some stuff */// Redirect to "my-action" of "my-controller" in the current// module, using the params param1 => test and param2 => test2$this->_redirector->gotoSimple("my-action","my-controller",null,array("param1" => "test", "param2" => "test2" ));}}Example #8 通过gotoRoute()使用路由组装(route assembly)
下面的例子使用了路由器的assemble()方法,基于传入参数的关联数组来创建URL。假定下面的路由已经注册:
$route = new Zend_Controller_Router_Route("blog/:year/:month/:day/:id",array("controller" => "archive", "module" => "blog", "action" => "view"));$router->addRoute("blogArchive", $route);
给定一个数组,其中年份为2006,月份为4,日期为24,id为42,据此可以组装URL/blog/2006/4/24/42。
class BlogAdminController extends Zend_Controller_Action{/** * Redirector - defined for code completion * * @var Zend_Controller_Action_Helper_Redirector */protected $_redirector = null;public function init(){$this->_redirector = $this->_helper->getHelper("Redirector");}public function returnAction(){/* do some stuff */// Redirect to blog archive. Builds the following URL:// /blog/2006/4/24/42$this->_redirector->gotoRoute(array("year" => 2006, "month" => 4, "day" => 24, "id" => 42),"blogArchive");}}Zend_Controller_Action_Helper_Redirector的源码。
通过源代码不难看出实现方法,以及常见的使用方法。
<?php/** * @see Zend_Controller_Action_Helper_Abstract */require_once "Zend/Controller/Action/Helper/Abstract.php";/** * @categoryZend * @packageZend_Controller * @subpackage Zend_Controller_Action_Helper * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com) * @licensehttp://framework.zend.com/license/new-bsd New BSD License */class Zend_Controller_Action_Helper_Redirector extends Zend_Controller_Action_Helper_Abstract{/** * HTTP status code for redirects * @var int */protected $_code = 302;/** * Whether or not calls to _redirect() should exit script execution * @var boolean */protected $_exit = true;/** * Whether or not _redirect() should attempt to prepend the base URL to the * passed URL (if it"s a relative URL) * @var boolean */protected $_prependBase = true;/** * Url to which to redirect * @var string */protected $_redirectUrl = null;/** * Whether or not to use an absolute URI when redirecting * @var boolean */protected $_useAbsoluteUri = false;/** * Whether or not to close the session before exiting * @var boolean */protected $_closeSessionOnExit = true;/** * Retrieve HTTP status code to emit on {@link _redirect()} call * * @return int */public function getCode(){return $this->_code;}/** * Validate HTTP status redirect code * * @param int $code * @throws Zend_Controller_Action_Exception on invalid HTTP status code * @return true */protected function _checkCode($code){$code = (int)$code;if ((300 > $code) || (307 < $code) || (304 == $code) || (306 == $code)) {require_once "Zend/Controller/Action/Exception.php";throw new Zend_Controller_Action_Exception("Invalid redirect HTTP status code (" . $code . ")");}return true;}/** * Retrieve HTTP status code for {@link _redirect()} behaviour * * @param int $code * @return Zend_Controller_Action_Helper_Redirector Provides a fluent interface */public function setCode($code){$this->_checkCode($code);$this->_code = $code;return $this;}/** * Retrieve flag for whether or not {@link _redirect()} will exit when finished. * * @return boolean */public function getExit(){return $this->_exit;}/** * Retrieve exit flag for {@link _redirect()} behaviour * * @param boolean $flag * @return Zend_Controller_Action_Helper_Redirector Provides a fluent interface */public function setExit($flag){$this->_exit = ($flag) ? true : false;return $this;}/** * Retrieve flag for whether or not {@link _redirect()} will prepend the * base URL on relative URLs * * @return boolean */public function getPrependBase(){return $this->_prependBase;}/** * Retrieve "prepend base" flag for {@link _redirect()} behaviour * * @param boolean $flag * @return Zend_Controller_Action_Helper_Redirector Provides a fluent interface */public function setPrependBase($flag){$this->_prependBase = ($flag) ? true : false;return $this;}/** * Retrieve flag for whether or not {@link redirectAndExit()} shall close the session before * exiting. * * @return boolean */public function getCloseSessionOnExit(){return $this->_closeSessionOnExit;}/** * Set flag for whether or not {@link redirectAndExit()} shall close the session before exiting. * * @param boolean $flag * @return Zend_Controller_Action_Helper_Redirector Provides a fluent interface */public function setCloseSessionOnExit($flag){$this->_closeSessionOnExit = ($flag) ? true : false;return $this;}/** * Return use absolute URI flag * * @return boolean */public function getUseAbsoluteUri(){return $this->_useAbsoluteUri;}/** * Set use absolute URI flag * * @param boolean $flag * @return Zend_Controller_Action_Helper_Redirector Provides a fluent interface */public function setUseAbsoluteUri($flag = true){$this->_useAbsoluteUri = ($flag) ? true : false;return $this;}/** * Set redirect in response object * * @return void */protected function _redirect($url){if ($this->getUseAbsoluteUri() && !preg_match("#^(https?|ftp)://#", $url)) {$host = (isset($_SERVER["HTTP_HOST"])?$_SERVER["HTTP_HOST"]:"");$proto = (isset($_SERVER["HTTPS"])&&$_SERVER["HTTPS"]!=="off") ? "https" : "http";$port = (isset($_SERVER["SERVER_PORT"])?$_SERVER["SERVER_PORT"]:80);$uri= $proto . "://" . $host;if ((("http" == $proto) && (80 != $port)) || (("https" == $proto) && (443 != $port))) {// do not append if HTTP_HOST already contains portif (strrchr($host, ":") === false) {$uri .= ":" . $port;}}$url = $uri . "/" . ltrim($url, "/");}$this->_redirectUrl = $url;$this->getResponse()->setRedirect($url, $this->getCode());}/** * Retrieve currently set URL for redirect * * @return string */public function getRedirectUrl(){return $this->_redirectUrl;}/** * Determine if the baseUrl should be prepended, and prepend if necessary * * @param string $url * @return string */protected function _prependBase($url){if ($this->getPrependBase()) {$request = $this->getRequest();if ($request instanceof Zend_Controller_Request_Http) {$base = rtrim($request->getBaseUrl(), "/");if (!empty($base) && ("/" != $base)) {$url = $base . "/" . ltrim($url, "/");} else {$url = "/" . ltrim($url, "/");}}}return $url;}/** * Set a redirect URL of the form /module/controller/action/params * * @param string $action * @param string $controller * @param string $module * @param array $params * @return void */public function setGotoSimple($action, $controller = null, $module = null, array $params = array()){$dispatcher = $this->getFrontController()->getDispatcher();$request= $this->getRequest();$curModule = $request->getModuleName();$useDefaultController = false;if (null === $controller && null !== $module) {$useDefaultController = true;}if (null === $module) {$module = $curModule;}if ($module == $dispatcher->getDefaultModule()) {$module = "";}if (null === $controller && !$useDefaultController) {$controller = $request->getControllerName();if (empty($controller)) {$controller = $dispatcher->getDefaultControllerName();}}$params[$request->getModuleKey()] = $module;$params[$request->getControllerKey()] = $controller;$params[$request->getActionKey()] = $action;$router = $this->getFrontController()->getRouter();$url= $router->assemble($params, "default", true);$this->_redirect($url);}/** * Build a URL based on a route * * @param array$urlOptions * @param string $name Route name * @param boolean $reset * @param boolean $encode * @return void */public function setGotoRoute(array $urlOptions = array(), $name = null, $reset = false, $encode = true){$router = $this->getFrontController()->getRouter();$url= $router->assemble($urlOptions, $name, $reset, $encode);$this->_redirect($url);}/** * Set a redirect URL string * * By default, emits a 302 HTTP status header, prepends base URL as defined * in request object if url is relative, and halts script execution by * calling exit(). * * $options is an optional associative array that can be used to control * redirect behaviour. The available option keys are: * - exit: boolean flag indicating whether or not to halt script execution when done * - prependBase: boolean flag indicating whether or not to prepend the base URL when a relative URL is provided * - code: integer HTTP status code to use with redirect. Should be between 300 and 307. * * _redirect() sets the Location header in the response object. If you set * the exit flag to false, you can override this header later in code * execution. * * If the exit flag is true (true by default), _redirect() will write and * close the current session, if any. * * @param string $url * @param array $options * @return void */public function setGotoUrl($url, array $options = array()){// prevent header injections$url = str_replace(array("
", "
"), "", $url);if (null !== $options) {if (isset($options["exit"])) {$this->setExit(($options["exit"]) ? true : false);}if (isset($options["prependBase"])) {$this->setPrependBase(($options["prependBase"]) ? true : false);}if (isset($options["code"])) {$this->setCode($options["code"]);}}// If relative URL, decide if we should prepend base URLif (!preg_match("|^[a-z]+://|", $url)) {$url = $this->_prependBase($url);}$this->_redirect($url);}/** * Perform a redirect to an action/controller/module with params * * @param string $action * @param string $controller * @param string $module * @param array $params * @return void */public function gotoSimple($action, $controller = null, $module = null, array $params = array()){$this->setGotoSimple($action, $controller, $module, $params);if ($this->getExit()) {$this->redirectAndExit();}}/** * Perform a redirect to an action/controller/module with params, forcing an immdiate exit * * @param mixed $action * @param mixed $controller * @param mixed $module * @param array $params * @return void */public function gotoSimpleAndExit($action, $controller = null, $module = null, array $params = array()){$this->setGotoSimple($action, $controller, $module, $params);$this->redirectAndExit();}/** * Redirect to a route-based URL * * Uses route"s assemble method tobuild the URL; route is specified by $name; * default route is used if none provided. * * @param array$urlOptions Array of key/value pairs used to assemble URL * @param string $name * @param boolean $reset * @param boolean $encode * @return void */public function gotoRoute(array $urlOptions = array(), $name = null, $reset = false, $encode = true){$this->setGotoRoute($urlOptions, $name, $reset, $encode);if ($this->getExit()) {$this->redirectAndExit();}}/** * Redirect to a route-based URL, and immediately exit * * Uses route"s assemble method tobuild the URL; route is specified by $name; * default route is used if none provided. * * @param array$urlOptions Array of key/value pairs used to assemble URL * @param string $name * @param boolean $reset * @return void */public function gotoRouteAndExit(array $urlOptions = array(), $name = null, $reset = false){$this->setGotoRoute($urlOptions, $name, $reset);$this->redirectAndExit();}/** * Perform a redirect to a url * * @param string $url * @param array $options * @return void */public function gotoUrl($url, array $options = array()){$this->setGotoUrl($url, $options);if ($this->getExit()) {$this->redirectAndExit();}}/** * Set a URL string for a redirect, perform redirect, and immediately exit * * @param string $url * @param array $options * @return void */public function gotoUrlAndExit($url, array $options = array()){$this->setGotoUrl($url, $options);$this->redirectAndExit();}/** * exit(): Perform exit for redirector * * @return void */public function redirectAndExit(){if ($this->getCloseSessionOnExit()) {// Close session, if startedif (class_exists("Zend_Session", false) && Zend_Session::isStarted()) {Zend_Session::writeClose();} elseif (isset($_SESSION)) {session_write_close();}}$this->getResponse()->sendHeaders();exit();}/** * direct(): Perform helper when called as * $this->_helper->redirector($action, $controller, $module, $params) * * @param string $action * @param string $controller * @param string $module * @param array $params * @return void */public function direct($action, $controller = null, $module = null, array $params = array()){$this->gotoSimple($action, $controller, $module, $params);}/** * Overloading * * Overloading for old "goto", "setGoto", and "gotoAndExit" methods * * @param string $method * @param array $args * @return mixed * @throws Zend_Controller_Action_Exception for invalid methods */public function __call($method, $args){$method = strtolower($method);if ("goto" == $method) {return call_user_func_array(array($this, "gotoSimple"), $args);}if ("setgoto" == $method) {return call_user_func_array(array($this, "setGotoSimple"), $args);}if ("gotoandexit" == $method) {return call_user_func_array(array($this, "gotoSimpleAndExit"), $args);}require_once "Zend/Controller/Action/Exception.php";throw new Zend_Controller_Action_Exception(sprintf("Invalid method "%s" called on redirector", $method));}}更多关于zend相关内容感兴趣的读者可查看本站专题:《Zend FrameWork框架入门教程》、《php优秀开发框架总结》、《Yii框架入门及常用技巧总结》、《ThinkPHP入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
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