Zend Framework教程之响应对象的封装Zend_Controller_Response实例详解

abstract class Zend_Controller_Response_Abstract
{
 /**
  * Body content
  * @var array
  */
 protected $_body = array();
 /**
  * Exception stack
  * @var Exception
  */
 protected $_exceptions = array();
 /**
  * Array of headers. Each header is an array with keys 'name' and 'value'
  * @var array
  */
 protected $_headers = array();
 /**
  * Array of raw headers. Each header is a single string, the entire header to emit
  * @var array
  */
 protected $_headersRaw = array();
 /**
  * HTTP response code to use in headers
  * @var int
  */
 protected $_httpResponseCode = 200;
 /**
  * Flag; is this response a redirect"' . gettype($name) . '")');
  }
  if (isset($this->_body[$name])) {
   unset($this->_body[$name]);
  }
  $this->_body[$name] = (string) $content;
  return $this;
 }
 /**
  * Prepend a named body segment to the body content array
  *
  * If segment already exists, replaces with $content and places at top of
  * array.
  *
  * @param string $name
  * @param string $content
  * @return void
  */
 public function prepend($name, $content)
 {
  if (!is_string($name)) {
   require_once 'Zend/Controller/Response/Exception.php';
   throw new Zend_Controller_Response_Exception('Invalid body segment key ("' . gettype($name) . '")');
  }
  if (isset($this->_body[$name])) {
   unset($this->_body[$name]);
  }
  $new = array($name => (string) $content);
  $this->_body = $new + $this->_body;
  return $this;
 }
 /**
  * Insert a named segment into the body content array
  *
  * @param string $name
  * @param string $content
  * @param string $parent
  * @param boolean $before Whether to insert the new segment before or
  * after the parent. Defaults to false (after)
  * @return Zend_Controller_Response_Abstract
  */
 public function insert($name, $content, $parent = null, $before = false)
 {
  if (!is_string($name)) {
   require_once 'Zend/Controller/Response/Exception.php';
   throw new Zend_Controller_Response_Exception('Invalid body segment key ("' . gettype($name) . '")');
  }
  if ((null !== $parent) && !is_string($parent)) {
   require_once 'Zend/Controller/Response/Exception.php';
   throw new Zend_Controller_Response_Exception('Invalid body segment parent key ("' . gettype($parent) . '")');
  }
  if (isset($this->_body[$name])) {
   unset($this->_body[$name]);
  }
  if ((null === $parent) || !isset($this->_body[$parent])) {
   return $this->append($name, $content);
  }
  $ins = array($name => (string) $content);
  $keys = array_keys($this->_body);
  $loc = array_search($parent, $keys);
  if (!$before) {
   // Increment location if not inserting before
   ++$loc;
  }
  if (0 === $loc) {
   // If location of key is 0, we're prepending
   $this->_body = $ins + $this->_body;
  } elseif ($loc >= (count($this->_body))) {
   // If location of key is maximal, we're appending
   $this->_body = $this->_body + $ins;
  } else {
   // Otherwise, insert at location specified
   $pre = array_slice($this->_body, 0, $loc);
   $post = array_slice($this->_body, $loc);
   $this->_body = $pre + $ins + $post;
  }
  return $this;
 }
 /**
  * Echo the body segments
  *
  * @return void
  */
 public function outputBody()
 {
  $body = implode('', $this->_body);
  echo $body;
 }
 /**
  * Register an exception with the response
  *
  * @param Exception $e
  * @return Zend_Controller_Response_Abstract
  */
 public function setException(Exception $e)
 {
  $this->_exceptions[] = $e;
  return $this;
 }
 /**
  * Retrieve the exception stack
  *
  * @return array
  */
 public function getException()
 {
  return $this->_exceptions;
 }
 /**
  * Has an exception been registered with the response"\n";
   }
   echo $exceptions;
   return;
  }
  $this->outputBody();
 }
 /**
  * Magic __toString functionality
  *
  * Proxies to {@link sendResponse()} and returns response value as string
  * using output buffering.
  *
  * @return string
  */
 public function __toString()
 {
  ob_start();
  $this->sendResponse();
  return ob_get_clean();
 }
}

/** Zend_Controller_Response_Abstract */
require_once 'Zend/Controller/Response/Abstract.php';
/**
 * Zend_Controller_Response_Http
 *
 * HTTP response for controllers
 *
 * @uses Zend_Controller_Response_Abstract
 * @package Zend_Controller
 * @subpackage Response
 */
class Zend_Controller_Response_Http extends Zend_Controller_Response_Abstract
{
}

$response->sendResponse();

$front->returnResponse(true);
$response = $front->dispatch();
// do some more processing, such as logging...
// and then send the output:
$response->sendResponse();

// Within an action controller action:
// Set a header
$this->getResponse()
 ->setHeader('Content-Type', 'text/html')
 ->appendBody($content);

// retrieve post-dispatch:
$front->dispatch();
$response = $front->getResponse();
if ($response->isException()) {
 // log, mail, etc...
}
// Or, have the front controller dispatch() process return it
$front->returnResponse(true);
$response = $front->dispatch();
// do some processing...
// finally, echo the response
$response->sendResponse();

$response->renderExceptions(true);
$front->dispatch($request, $response);
// or:
$front->returnResponse(true);
$response = $front->dispatch();
$response->renderExceptions();
$response->sendResponse();
// or:
$front->throwExceptions(true);
$front->dispatch();

// Assume that this plugin class is registered with the front controller
class MyPlugin extends Zend_Controller_Plugin_Abstract
{
 public function preDispatch(Zend_Controller_Request_Abstract $request)
 {
  $response = $this->getResponse();
  $view = new Zend_View();
  $view->setBasePath('../views/scripts');
  $response->prepend('header', $view->render('header.phtml'));
 }
 public function postDispatch(Zend_Controller_Request_Abstract $request)
 {
  $response = $this->getResponse();
  $view = new Zend_View();
  $view->setBasePath('../views/scripts');
  $response->append('footer', $view->render('footer.phtml'));
 }
}
// a sample action controller
class MyController extends Zend_Controller_Action
{
 public function fooAction()
 {
  $this->render();
 }
}

array(
 'header' => ..., // header content
 'default' => ..., // body content from MyController::fooAction()
 'footer' => ... // footer content
);