Zend Framework動作助手Redirector用法實例詳解

本文實例講述了Zend Framework動作助手Redirector用法。分享給大家供大家參考，具體如下：

Redirector 提供另一種實作方式，幫助程式重新導向到內部或外部頁面；

轉向器(Redirector)助理讓你使用一個轉向器物件幫助程式重新導向到新的URL。與_redirect()方法相比，它具有多項優勢。例如能夠在轉向器物件中預先配置整個網站的行為，或使用與Zend_Controller_Action::_forward()相似的gotoSimple($action, $controller, $module, $params)介面。

轉向器擁有大量影響重定向行為的方法：

setCode() 設定重定向過程中使用的HTTP回應碼。

setExit() 在重定向後強制執行exit()方法。預設已設定。

setGotoSimple()設定預設的URL，當沒有提供參數給gotoSimple()方法時轉向該URL。可以使用類似Zend_Controller_Action::_forward()的API：setGotoSimple($action, $controller = null, $module = null, array $params = array());

setGotoRoute()設定基於一個註冊路由器的URL。透過傳入一個鍵/值數組和一個路由器名，它將根據路由器的類型和定義來組織URL。

setGotoUrl()設定預設的URL，當沒有參數傳入gotoUrl()，將使用該URL。接受單一URL字串。

setPrependBase()在setGotoUrl()、gotoUrl()或gotoUrlAndExit()指定的URL前面，加入請求物件的基底位址(base URL)。

setUseAbsoluteUri()強制轉向器在重定向時使用絕對的URI。當該選項設定後，將使用$_SERVER['HTTP_HOST']、 $_SERVER['SERVER_PORT']和 $_SERVER['HTTPS']以及重定向方法指定的URL，來形成一個完整的URI。該選項目前預設關閉，將來的版本可能會預設為開啟。

此外，轉向器中還有大量方法來執行實際的重定向。

gotoSimple()使用setGotoSimple()(類似_forward()的API)來建構URL並執行重定向。

gotoRoute()使用setGotoRoute()(路由組裝route-assembly)來建構URL並執行重定向。

gotoUrl()使用setGotoUrl() URL字串）來建構URL並執行重定向。
最後，你可以在任何時刻使用getRedirectUrl()來確定目前的重定向URL。

基礎用例

Example #5 設定選項

這個例子改變了幾個選項，包括設定重定向時使用的HTTP狀態碼為303，重定向時不默認退出，以及定義了預設的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 使用預設設定

這個例子假定使用預設設定，也就表示任何重定向將導致立即退出。

// ALTERNATIVE EXAMPLE
class 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 模擬了Zend_Controller_Action::_forward()。主要的差異在於它透過傳入的參數建構URL，使用預設路由器的預設格式:module/:controller/:action/*。然後重定向而不是繼續動作鏈循環。

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 通過gotoRoute()使用路由組裝(route assembly)

下面的例子使用了路由器的assemble()方法，基於傳入參數的關聯數組來創建URL。假設下面的路由已經註冊:

$route = new Zend_Controller_Router_Route(
  'blog/:year/:month/:day/:id',
  array('controller' => 'archive',
     'module' => 'blog',
     'action' => 'view')
);
$router->addRoute('blogArchive', $route);

   

給定一個數組，其中年份為2006，月份為4，日期為24，id為42，據此可以組裝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的原始碼。

透過原始碼不難看出實作方法，以及常見的使用方法。

<?php
/**
 * @see Zend_Controller_Action_Helper_Abstract
 */
require_once &#39;Zend/Controller/Action/Helper/Abstract.php&#39;;
/**
 * @category  Zend
 * @package  Zend_Controller
 * @subpackage Zend_Controller_Action_Helper
 * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license  http://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&#39;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 &#39;Zend/Controller/Action/Exception.php&#39;;
      throw new Zend_Controller_Action_Exception(&#39;Invalid redirect HTTP status code (&#39; . $code . &#39;)&#39;);
    }
    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 &#39;prepend base&#39; 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(&#39;#^(https?|ftp)://#&#39;, $url)) {
      $host = (isset($_SERVER[&#39;HTTP_HOST&#39;])?$_SERVER[&#39;HTTP_HOST&#39;]:&#39;&#39;);
      $proto = (isset($_SERVER[&#39;HTTPS&#39;])&&$_SERVER[&#39;HTTPS&#39;]!=="off") ? &#39;https&#39; : &#39;http&#39;;
      $port = (isset($_SERVER[&#39;SERVER_PORT&#39;])?$_SERVER[&#39;SERVER_PORT&#39;]:80);
      $uri  = $proto . &#39;://&#39; . $host;
      if (((&#39;http&#39; == $proto) && (80 != $port)) || ((&#39;https&#39; == $proto) && (443 != $port))) {
        // do not append if HTTP_HOST already contains port
        if (strrchr($host, &#39;:&#39;) === false) {
          $uri .= &#39;:&#39; . $port;
        }
      }
      $url = $uri . &#39;/&#39; . ltrim($url, &#39;/&#39;);
    }
    $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(), &#39;/&#39;);
        if (!empty($base) && (&#39;/&#39; != $base)) {
          $url = $base . &#39;/&#39; . ltrim($url, &#39;/&#39;);
        } else {
          $url = &#39;/&#39; . ltrim($url, &#39;/&#39;);
        }
      }
    }
    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 = &#39;&#39;;
    }
    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, &#39;default&#39;, 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("\n", "\r"), &#39;&#39;, $url);
    if (null !== $options) {
      if (isset($options[&#39;exit&#39;])) {
        $this->setExit(($options[&#39;exit&#39;]) ? true : false);
      }
      if (isset($options[&#39;prependBase&#39;])) {
        $this->setPrependBase(($options[&#39;prependBase&#39;]) ? true : false);
      }
      if (isset($options[&#39;code&#39;])) {
        $this->setCode($options[&#39;code&#39;]);
      }
    }
    // If relative URL, decide if we should prepend base URL
    if (!preg_match(&#39;|^[a-z]+://|&#39;, $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&#39;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&#39;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 started
      if (class_exists(&#39;Zend_Session&#39;, 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 &#39;goto&#39;, &#39;setGoto&#39;, and &#39;gotoAndExit&#39; 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 (&#39;goto&#39; == $method) {
      return call_user_func_array(array($this, &#39;gotoSimple&#39;), $args);
    }
    if (&#39;setgoto&#39; == $method) {
      return call_user_func_array(array($this, &#39;setGotoSimple&#39;), $args);
    }
    if (&#39;gotoandexit&#39; == $method) {
      return call_user_func_array(array($this, &#39;gotoSimpleAndExit&#39;), $args);
    }
    require_once &#39;Zend/Controller/Action/Exception.php&#39;;
    throw new Zend_Controller_Action_Exception(sprintf(&#39;Invalid method "%s" called on redirector&#39;, $method));
  }
}

   

希望本文所述對大家PHP程式設計有所幫助。

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