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

本文实例讲述了Zend Framework教程之响应对象的封装 Zend_Controller_Response用法。分享给大家供大家参考，具体如下：

概述

响应对象逻辑上是请求对象的搭档.目的在于收集消息体和/或消息头，因而可能返回大批的结果。

Zend_Controller_Response响应对象的基本实现

├── Response
│ ├── Abstract.php
│ ├── Cli.php
│ ├── Exception.php
│ ├── Http.php
│ └── HttpTestCase.php

Zend_Controller_Response_Abstract

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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?

* @var boolean

*/

protected $_isRedirect = false;

/**

* Whether or not to render exceptions; off by default

* @var boolean

*/

protected $_renderExceptions = false;

/**

* Flag; if true, when header operations are called after headers have been

* sent, an exception will be raised; otherwise, processing will continue

* as normal. Defaults to true.

*

* @see canSendHeaders()

* @var boolean

*/

public $headersSentThrowsException = true;

/**

* Normalize a header name

*

* Normalizes a header name to X-Capitalized-Names

*

* @param string $name

* @return string

*/

protected function _normalizeHeader($name)

{

$filtered = str_replace(array('-', '_'), ' ', (string) $name);

$filtered = ucwords(strtolower($filtered));

$filtered = str_replace(' ', '-', $filtered);

return $filtered;

}

/**

* Set a header

*

* If $replace is true, replaces any headers already defined with that

* $name.

*

* @param string $name

* @param string $value

* @param boolean $replace

* @return Zend_Controller_Response_Abstract

*/

public function setHeader($name, $value, $replace = false)

{

$this->canSendHeaders(true);

$name = $this->_normalizeHeader($name);

$value = (string) $value;

if ($replace) {

foreach ($this->_headers as $key => $header) {

if ($name == $header['name']) {

unset($this->_headers[$key]);

}

$this->_headers[] = array(

'name' => $name,

'value' => $value,

'replace' => $replace

);

return $this;

}

/**

* Set redirect URL

*

* Sets Location header and response code. Forces replacement of any prior

* redirects.

*

* @param string $url

* @param int $code

* @return Zend_Controller_Response_Abstract

*/

public function setRedirect($url, $code = 302)

{

$this->canSendHeaders(true);

$this->setHeader('Location', $url, true)

->setHttpResponseCode($code);

return $this;

}

/**

* Is this a redirect?

*

* @return boolean

*/

public function isRedirect()

{

return $this->_isRedirect;

}

/**

* Return array of headers; see {@link $_headers} for format

*

* @return array

*/

public function getHeaders()

{

return $this->_headers;

}

/**

* Clear headers

*

* @return Zend_Controller_Response_Abstract

*/

public function clearHeaders()

{

$this->_headers = array();

return $this;

}

/**

* Clears the specified HTTP header

*

* @param string $name

* @return Zend_Controller_Response_Abstract

*/

public function clearHeader($name)

{

if (! count($this->_headers)) {

return $this;

}

foreach ($this->_headers as $index => $header) {

if ($name == $header['name']) {

unset($this->_headers[$index]);

}

return $this;

}

/**

* Set raw HTTP header

*

* Allows setting non key => value headers, such as status codes

*

* @param string $value

* @return Zend_Controller_Response_Abstract

*/

public function setRawHeader($value)

{

$this->canSendHeaders(true);

if ('Location' == substr($value, 0, 8)) {

$this->_isRedirect = true;

}

$this->_headersRaw[] = (string) $value;

return $this;

}

/**

* Retrieve all {@link setRawHeader() raw HTTP headers}

*

* @return array

*/

public function getRawHeaders()

{

return $this->_headersRaw;

}

/**

* Clear all {@link setRawHeader() raw HTTP headers}

*

* @return Zend_Controller_Response_Abstract

*/

public function clearRawHeaders()

{

$this->_headersRaw = array();

return $this;

}

/**

* Clears the specified raw HTTP header

*

* @param string $headerRaw

* @return Zend_Controller_Response_Abstract

*/

public function clearRawHeader($headerRaw)

{

if (! count($this->_headersRaw)) {

return $this;

}

$key = array_search($headerRaw, $this->_headersRaw);

if ($key !== false) {

unset($this->_headersRaw[$key]);

}

return $this;

}

/**

* Clear all headers, normal and raw

*

* @return Zend_Controller_Response_Abstract

*/

public function clearAllHeaders()

{

return $this->clearHeaders()

->clearRawHeaders();

}

/**

* Set HTTP response code to use with headers

*

* @param int $code

* @return Zend_Controller_Response_Abstract

*/

public function setHttpResponseCode($code)

{

if (!is_int($code) || (100 > $code) || (599 < $code)) {

require_once 'Zend/Controller/Response/Exception.php';

throw new Zend_Controller_Response_Exception('Invalid HTTP response code');

}

if ((300 <= $code) && (307 >= $code)) {

$this->_isRedirect = true;

} else {

$this->_isRedirect = false;

}

$this->_httpResponseCode = $code;

return $this;

}

/**

* Retrieve HTTP response code

*

* @return int

*/

public function getHttpResponseCode()

{

return $this->_httpResponseCode;

}

/**

* Can we send headers?

*

* @param boolean $throw Whether or not to throw an exception if headers have been sent; defaults to false

* @return boolean

* @throws Zend_Controller_Response_Exception

*/

public function canSendHeaders($throw = false)

{

$ok = headers_sent($file, $line);

if ($ok && $throw && $this->headersSentThrowsException) {

require_once 'Zend/Controller/Response/Exception.php';

throw new Zend_Controller_Response_Exception('Cannot send headers; headers already sent in ' . $file . ', line ' . $line);

}

return !$ok;

}

/**

* Send all headers

*

* Sends any headers specified. If an {@link setHttpResponseCode() HTTP response code}

* has been specified, it is sent with the first header.

*

* @return Zend_Controller_Response_Abstract

*/

public function sendHeaders()

{

// Only check if we can send headers if we have headers to send

if (count($this->_headersRaw) || count($this->_headers) || (200 != $this->_httpResponseCode)) {

$this->canSendHeaders(true);

} elseif (200 == $this->_httpResponseCode) {

// Haven't changed the response code, and we have no headers

return $this;

}

$httpCodeSent = false;

foreach ($this->_headersRaw as $header) {

if (!$httpCodeSent && $this->_httpResponseCode) {

header($header, true, $this->_httpResponseCode);

$httpCodeSent = true;

} else {

header($header);

}

foreach ($this->_headers as $header) {

if (!$httpCodeSent && $this->_httpResponseCode) {

header($header['name'] . ': ' . $header['value'], $header['replace'], $this->_httpResponseCode);

$httpCodeSent = true;

} else {

header($header['name'] . ': ' . $header['value'], $header['replace']);

}

if (!$httpCodeSent) {

header('HTTP/1.1 ' . $this->_httpResponseCode);

$httpCodeSent = true;

}

return $this;

}

/**

* Set body content

*

* If $name is not passed, or is not a string, resets the entire body and

* sets the 'default' key to $content.

*

* If $name is a string, sets the named segment in the body array to

* $content.

*

* @param string $content

* @param null|string $name

* @return Zend_Controller_Response_Abstract

*/

public function setBody($content, $name = null)

{

if ((null === $name) || !is_string($name)) {

$this->_body = array('default' => (string) $content);

} else {

$this->_body[$name] = (string) $content;

}

return $this;

}

/**

* Append content to the body content

*

* @param string $content

* @param null|string $name

* @return Zend_Controller_Response_Abstract

*/

public function appendBody($content, $name = null)

{

if ((null === $name) || !is_string($name)) {

if (isset($this->_body['default'])) {

$this->_body['default'] .= (string) $content;

} else {

return $this->append('default', $content);

}

} elseif (isset($this->_body[$name])) {

$this->_body[$name] .= (string) $content;

} else {

return $this->append($name, $content);

}

return $this;

}

/**

* Clear body array

*

* With no arguments, clears the entire body array. Given a $name, clears

* just that named segment; if no segment matching $name exists, returns

* false to indicate an error.

*

* @param string $name Named segment to clear

* @return boolean

*/

public function clearBody($name = null)

{

if (null !== $name) {

$name = (string) $name;

if (isset($this->_body[$name])) {

unset($this->_body[$name]);

return true;

}

return false;

}

$this->_body = array();

return true;

}

/**

* Return the body content

*

* If $spec is false, returns the concatenated values of the body content

* array. If $spec is boolean true, returns the body content array. If

* $spec is a string and matches a named segment, returns the contents of

* that segment; otherwise, returns null.

*

* @param boolean $spec

* @return string|array|null

*/

public function getBody($spec = false)

{

if (false === $spec) {

ob_start();

$this->outputBody();

return ob_get_clean();

} elseif (true === $spec) {

return $this->_body;

} elseif (is_string($spec) && isset($this->_body[$spec])) {

return $this->_body[$spec];

}

return null;

}

/**

Zend_Controller_Response_Http

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

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