281 lines
9.5 KiB
PHP
281 lines
9.5 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Feed
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Atom.php 13890 2009-01-31 10:10:30Z yoshida@zend.co.jp $
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*/
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/**
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* @see Zend_Feed_Entry_Abstract
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*/
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require_once 'Zend/Feed/Entry/Abstract.php';
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/**
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* Concrete class for working with Atom entries.
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*
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* @category Zend
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* @package Zend_Feed
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Feed_Entry_Atom extends Zend_Feed_Entry_Abstract
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{
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/**
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* Content-Type
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*/
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const CONTENT_TYPE = 'application/atom+xml';
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/**
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* Root XML element for Atom entries.
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*
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* @var string
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*/
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protected $_rootElement = 'entry';
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/**
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* Root namespace for Atom entries.
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*
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* @var string
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*/
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protected $_rootNamespace = 'atom';
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/**
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* Delete an atom entry.
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*
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* Delete tries to delete this entry from its feed. If the entry
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* does not contain a link rel="edit", we throw an error (either
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* the entry does not yet exist or this is not an editable
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* feed). If we have a link rel="edit", we do the empty-body
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* HTTP DELETE to that URI and check for a response of 2xx.
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* Usually the response would be 204 No Content, but the Atom
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* Publishing Protocol permits it to be 200 OK.
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*
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* @return void
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* @throws Zend_Feed_Exception
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*/
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public function delete()
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{
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// Look for link rel="edit" in the entry object.
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$deleteUri = $this->link('edit');
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if (!$deleteUri) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Cannot delete entry; no link rel="edit" is present.');
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}
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// DELETE
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$client = Zend_Feed::getHttpClient();
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do {
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$client->setUri($deleteUri);
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if (Zend_Feed::getHttpMethodOverride()) {
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$client->setHeader('X-HTTP-Method-Override', 'DELETE');
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$response = $client->request('POST');
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} else {
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$response = $client->request('DELETE');
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}
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$httpStatus = $response->getStatus();
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switch ((int) $httpStatus / 100) {
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// Success
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case 2:
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return true;
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// Redirect
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case 3:
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$deleteUri = $response->getHeader('Location');
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continue;
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// Error
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default:
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception("Expected response code 2xx, got $httpStatus");
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}
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} while (true);
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}
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/**
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* Save a new or updated Atom entry.
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*
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* Save is used to either create new entries or to save changes to
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* existing ones. If we have a link rel="edit", we are changing
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* an existing entry. In this case we re-serialize the entry and
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* PUT it to the edit URI, checking for a 200 OK result.
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*
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* For posting new entries, you must specify the $postUri
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* parameter to save() to tell the object where to post itself.
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* We use $postUri and POST the serialized entry there, checking
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* for a 201 Created response. If the insert is successful, we
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* then parse the response from the POST to get any values that
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* the server has generated: an id, an updated time, and its new
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* link rel="edit".
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*
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* @param string $postUri Location to POST for creating new entries.
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* @return void
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* @throws Zend_Feed_Exception
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*/
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public function save($postUri = null)
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{
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if ($this->id()) {
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// If id is set, look for link rel="edit" in the
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// entry object and PUT.
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$editUri = $this->link('edit');
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if (!$editUri) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Cannot edit entry; no link rel="edit" is present.');
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}
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$client = Zend_Feed::getHttpClient();
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$client->setUri($editUri);
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if (Zend_Feed::getHttpMethodOverride()) {
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$client->setHeaders(array('X-HTTP-Method-Override: PUT',
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'Content-Type: ' . self::CONTENT_TYPE));
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$client->setRawData($this->saveXML());
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$response = $client->request('POST');
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} else {
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$client->setHeaders('Content-Type', self::CONTENT_TYPE);
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$client->setRawData($this->saveXML());
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$response = $client->request('PUT');
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}
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if ($response->getStatus() !== 200) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Expected response code 200, got ' . $response->getStatus());
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}
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} else {
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if ($postUri === null) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('PostURI must be specified to save new entries.');
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}
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$client = Zend_Feed::getHttpClient();
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$client->setUri($postUri);
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$client->setHeaders('Content-Type', self::CONTENT_TYPE);
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$client->setRawData($this->saveXML());
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$response = $client->request('POST');
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if ($response->getStatus() !== 201) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Expected response code 201, got '
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. $response->getStatus());
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}
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}
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// Update internal properties using $client->responseBody;
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@ini_set('track_errors', 1);
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$newEntry = new DOMDocument;
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$status = @$newEntry->loadXML($response->getBody());
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@ini_restore('track_errors');
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if (!$status) {
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// prevent the class to generate an undefined variable notice (ZF-2590)
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if (!isset($php_errormsg)) {
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if (function_exists('xdebug_is_enabled')) {
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$php_errormsg = '(error message not available, when XDebug is running)';
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} else {
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$php_errormsg = '(error message not available)';
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}
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}
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('XML cannot be parsed: ' . $php_errormsg);
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}
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$newEntry = $newEntry->getElementsByTagName($this->_rootElement)->item(0);
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if (!$newEntry) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('No root <feed> element found in server response:'
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. "\n\n" . $client->responseBody);
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}
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if ($this->_element->parentNode) {
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$oldElement = $this->_element;
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$this->_element = $oldElement->ownerDocument->importNode($newEntry, true);
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$oldElement->parentNode->replaceChild($this->_element, $oldElement);
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} else {
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$this->_element = $newEntry;
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}
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}
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/**
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* Easy access to <link> tags keyed by "rel" attributes.
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*
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* If $elt->link() is called with no arguments, we will attempt to
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* return the value of the <link> tag(s) like all other
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* method-syntax attribute access. If an argument is passed to
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* link(), however, then we will return the "href" value of the
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* first <link> tag that has a "rel" attribute matching $rel:
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*
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* $elt->link(): returns the value of the link tag.
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* $elt->link('self'): returns the href from the first <link rel="self"> in the entry.
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*
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* @param string $rel The "rel" attribute to look for.
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* @return mixed
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*/
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public function link($rel = null)
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{
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if ($rel === null) {
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return parent::__call('link', null);
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}
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// index link tags by their "rel" attribute.
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$links = parent::__get('link');
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if (!is_array($links)) {
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if ($links instanceof Zend_Feed_Element) {
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$links = array($links);
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} else {
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return $links;
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}
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}
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foreach ($links as $link) {
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if (empty($link['rel'])) {
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continue;
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}
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if ($rel == $link['rel']) {
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return $link['href'];
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}
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}
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return null;
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}
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}
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