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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Oauth
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Http.php 24593 2012-01-05 20:35:02Z matthew $
*/
/** Zend_Oauth_Http_Utility */
require_once 'Zend/Oauth/Http/Utility.php';
/** Zend_Uri_Http */
require_once 'Zend/Uri/Http.php';
/**
* @category Zend
* @package Zend_Oauth
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Oauth_Http
{
/**
* Array of all custom service parameters to be sent in the HTTP request
* in addition to the usual OAuth parameters.
*
* @var array
*/
protected $_parameters = array();
/**
* Reference to the Zend_Oauth_Consumer instance in use.
*
* @var string
*/
protected $_consumer = null;
/**
* OAuth specifies three request methods, this holds the current preferred
* one which by default uses the Authorization Header approach for passing
* OAuth parameters, and a POST body for non-OAuth custom parameters.
*
* @var string
*/
protected $_preferredRequestScheme = null;
/**
* Request Method for the HTTP Request.
*
* @var string
*/
protected $_preferredRequestMethod = Zend_Oauth::POST;
/**
* Instance of the general Zend_Oauth_Http_Utility class.
*
* @var Zend_Oauth_Http_Utility
*/
protected $_httpUtility = null;
/**
* Constructor
*
* @param Zend_Oauth_Consumer $consumer
* @param null|array $parameters
* @param null|Zend_Oauth_Http_Utility $utility
* @return void
*/
public function __construct(
Zend_Oauth_Consumer $consumer,
array $parameters = null,
Zend_Oauth_Http_Utility $utility = null
) {
$this->_consumer = $consumer;
$this->_preferredRequestScheme = $this->_consumer->getRequestScheme();
if ($parameters !== null) {
$this->setParameters($parameters);
}
if ($utility !== null) {
$this->_httpUtility = $utility;
} else {
$this->_httpUtility = new Zend_Oauth_Http_Utility;
}
}
/**
* Set a preferred HTTP request method.
*
* @param string $method
* @return Zend_Oauth_Http
*/
public function setMethod($method)
{
if (!in_array($method, array(Zend_Oauth::POST, Zend_Oauth::GET))) {
require_once 'Zend/Oauth/Exception.php';
throw new Zend_Oauth_Exception('invalid HTTP method: ' . $method);
}
$this->_preferredRequestMethod = $method;
return $this;
}
/**
* Preferred HTTP request method accessor.
*
* @return string
*/
public function getMethod()
{
return $this->_preferredRequestMethod;
}
/**
* Mutator to set an array of custom parameters for the HTTP request.
*
* @param array $customServiceParameters
* @return Zend_Oauth_Http
*/
public function setParameters(array $customServiceParameters)
{
$this->_parameters = $customServiceParameters;
return $this;
}
/**
* Accessor for an array of custom parameters.
*
* @return array
*/
public function getParameters()
{
return $this->_parameters;
}
/**
* Return the Consumer instance in use.
*
* @return Zend_Oauth_Consumer
*/
public function getConsumer()
{
return $this->_consumer;
}
/**
* Commence a request cycle where the current HTTP method and OAuth
* request scheme set an upper preferred HTTP request style and where
* failures generate a new HTTP request style further down the OAuth
* preference list for OAuth Request Schemes.
* On success, return the Request object that results for processing.
*
* @param array $params
* @return Zend_Http_Response
* @throws Zend_Oauth_Exception on HTTP request errors
* @todo Remove cycling?; Replace with upfront do-or-die configuration
*/
public function startRequestCycle(array $params)
{
$response = null;
$body = null;
$status = null;
try {
$response = $this->_attemptRequest($params);
} catch (Zend_Http_Client_Exception $e) {
require_once 'Zend/Oauth/Exception.php';
throw new Zend_Oauth_Exception('Error in HTTP request', null, $e);
}
if ($response !== null) {
$body = $response->getBody();
$status = $response->getStatus();
}
if ($response === null // Request failure/exception
|| $status == 500 // Internal Server Error
|| $status == 400 // Bad Request
|| $status == 401 // Unauthorized
|| empty($body) // Missing token
) {
$this->_assessRequestAttempt($response);
$response = $this->startRequestCycle($params);
}
return $response;
}
/**
* Return an instance of Zend_Http_Client configured to use the Query
* String scheme for an OAuth driven HTTP request.
*
* @param array $params
* @param string $url
* @return Zend_Http_Client
*/
public function getRequestSchemeQueryStringClient(array $params, $url)
{
$client = Zend_Oauth::getHttpClient();
$client->setUri($url);
$client->getUri()->setQuery(
$this->_httpUtility->toEncodedQueryString($params)
);
$client->setMethod($this->_preferredRequestMethod);
return $client;
}
/**
* Manages the switch from OAuth request scheme to another lower preference
* scheme during a request cycle.
*
* @param Zend_Http_Response
* @return void
* @throws Zend_Oauth_Exception if unable to retrieve valid token response
*/
protected function _assessRequestAttempt(Zend_Http_Response $response = null)
{
switch ($this->_preferredRequestScheme) {
case Zend_Oauth::REQUEST_SCHEME_HEADER:
$this->_preferredRequestScheme = Zend_Oauth::REQUEST_SCHEME_POSTBODY;
break;
case Zend_Oauth::REQUEST_SCHEME_POSTBODY:
$this->_preferredRequestScheme = Zend_Oauth::REQUEST_SCHEME_QUERYSTRING;
break;
default:
require_once 'Zend/Oauth/Exception.php';
throw new Zend_Oauth_Exception(
'Could not retrieve a valid Token response from Token URL:'
. ($response !== null
? PHP_EOL . $response->getBody()
: ' No body - check for headers')
);
}
}
/**
* Generates a valid OAuth Authorization header based on the provided
* parameters and realm.
*
* @param array $params
* @param string $realm
* @return string
*/
protected function _toAuthorizationHeader(array $params, $realm = null)
{
$headerValue = array();
$headerValue[] = 'OAuth realm="' . $realm . '"';
foreach ($params as $key => $value) {
if (!preg_match("/^oauth_/", $key)) {
continue;
}
$headerValue[] = Zend_Oauth_Http_Utility::urlEncode($key)
. '="'
. Zend_Oauth_Http_Utility::urlEncode($value)
. '"';
}
return implode(",", $headerValue);
}
}