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diff --git a/zend/library/Zend/Gdata/HttpClient.php b/zend/library/Zend/Gdata/HttpClient.php
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+++ b/zend/library/Zend/Gdata/HttpClient.php
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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_Gdata
+ * @subpackage Gdata
+ * @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: HttpClient.php 24593 2012-01-05 20:35:02Z matthew $
+ */
+
+/**
+ * Zend_Http_Client
+ */
+require_once 'Zend/Http/Client.php';
+
+/**
+ * Gdata Http Client object.
+ *
+ * Class to extend the generic Zend Http Client with the ability to perform
+ * secure AuthSub requests
+ *
+ * @category   Zend
+ * @package    Zend_Gdata
+ * @subpackage Gdata
+ * @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_Gdata_HttpClient extends Zend_Http_Client
+{
+
+    /**
+     * OpenSSL private key resource id
+     * This key is used for AuthSub authentication.  If this value is set,
+     * it is assuemd that secure AuthSub is desired.
+     *
+     * @var resource
+     */
+    private $_authSubPrivateKeyId = null;
+
+    /**
+     * Token for AuthSub authentication.
+     * If this token is set, AuthSub authentication is used.
+     *
+     * @var string
+     */
+    private $_authSubToken = null;
+
+    /**
+     * Token for ClientLogin authentication.
+     * If only this token is set, ClientLogin authentication is used.
+     *
+     * @var string
+     */
+    private $_clientLoginToken = null;
+
+    /**
+     * Token for ClientLogin authentication.
+     * If this token is set, and the AuthSub key is not set,
+     * ClientLogin authentication is used
+     *
+     * @var string
+     */
+    private $_clientLoginKey = null;
+
+    /**
+     * True if this request is being made with data supplied by
+     * a stream object instead of a raw encoded string.
+     *
+     * @var bool
+     */
+    protected $_streamingRequest = null;
+
+    /**
+     * Sets the PEM formatted private key, as read from a file.
+     *
+     * This method reads the file and then calls setAuthSubPrivateKey()
+     * with the file contents.
+     *
+     * @param string $file The location of the file containing the PEM key
+     * @param string $passphrase The optional private key passphrase
+     * @param bool $useIncludePath Whether to search the include_path
+     *                             for the file
+     * @return void
+     */
+    public function setAuthSubPrivateKeyFile($file, $passphrase = null,
+                                             $useIncludePath = false) {
+        $fp = @fopen($file, "r", $useIncludePath);
+        if (!$fp) {
+            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
+            throw new Zend_Gdata_App_InvalidArgumentException('Failed to open private key file for AuthSub.');
+        }
+
+        $key = '';
+        while (!feof($fp)) {
+            $key .= fread($fp, 8192);
+        }
+        $this->setAuthSubPrivateKey($key, $passphrase);
+        fclose($fp);
+    }
+
+    /**
+     * Sets the PEM formatted private key to be used for secure AuthSub auth.
+     *
+     * In order to call this method, openssl must be enabled in your PHP
+     * installation.  Otherwise, a Zend_Gdata_App_InvalidArgumentException
+     * will be thrown.
+     *
+     * @param string $key The private key
+     * @param string $passphrase The optional private key passphrase
+     * @throws Zend_Gdata_App_InvalidArgumentException
+     * @return Zend_Gdata_HttpClient Provides a fluent interface
+     */
+    public function setAuthSubPrivateKey($key, $passphrase = null) {
+        if ($key != null && !function_exists('openssl_pkey_get_private')) {
+            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
+            throw new Zend_Gdata_App_InvalidArgumentException(
+                    'You cannot enable secure AuthSub if the openssl module ' .
+                    'is not enabled in your PHP installation.');
+        }
+        $this->_authSubPrivateKeyId = openssl_pkey_get_private(
+                $key, $passphrase);
+        return $this;
+    }
+
+    /**
+     * Gets the openssl private key id
+     *
+     * @return string The private key
+     */
+    public function getAuthSubPrivateKeyId() {
+        return $this->_authSubPrivateKeyId;
+    }
+
+    /**
+     * Gets the AuthSub token used for authentication
+     *
+     * @return string The token
+     */
+    public function getAuthSubToken() {
+        return $this->_authSubToken;
+    }
+
+    /**
+     * Sets the AuthSub token used for authentication
+     *
+     * @param string $token The token
+     * @return Zend_Gdata_HttpClient Provides a fluent interface
+     */
+    public function setAuthSubToken($token) {
+        $this->_authSubToken = $token;
+        return $this;
+    }
+
+    /**
+     * Gets the ClientLogin token used for authentication
+     *
+     * @return string The token
+     */
+    public function getClientLoginToken() {
+        return $this->_clientLoginToken;
+    }
+
+    /**
+     * Sets the ClientLogin token used for authentication
+     *
+     * @param string $token The token
+     * @return Zend_Gdata_HttpClient Provides a fluent interface
+     */
+    public function setClientLoginToken($token) {
+        $this->_clientLoginToken = $token;
+        return $this;
+    }
+
+    /**
+     * Filters the HTTP requests being sent to add the Authorization header.
+     *
+     * If both AuthSub and ClientLogin tokens are set,
+     * AuthSub takes precedence.  If an AuthSub key is set, then
+     * secure AuthSub authentication is used, and the request is signed.
+     * Requests must be signed only with the private key corresponding to the
+     * public key registered with Google.  If an AuthSub key is set, but
+     * openssl support is not enabled in the PHP installation, an exception is
+     * thrown.
+     *
+     * @param string $method The HTTP method
+     * @param string $url The URL
+     * @param array $headers An associate array of headers to be
+     *                       sent with the request or null
+     * @param string $body The body of the request or null
+     * @param string $contentType The MIME content type of the body or null
+     * @throws Zend_Gdata_App_Exception if there was a signing failure
+     * @return array The processed values in an associative array,
+     *               using the same names as the params
+     */
+    public function filterHttpRequest($method, $url, $headers = array(), $body = null, $contentType = null) {
+        if ($this->getAuthSubToken() != null) {
+            // AuthSub authentication
+            if ($this->getAuthSubPrivateKeyId() != null) {
+                // secure AuthSub
+                $time = time();
+                $nonce = mt_rand(0, 999999999);
+                $dataToSign = $method . ' ' . $url . ' ' . $time . ' ' . $nonce;
+
+                // compute signature
+                $pKeyId = $this->getAuthSubPrivateKeyId();
+                $signSuccess = openssl_sign($dataToSign, $signature, $pKeyId,
+                                            OPENSSL_ALGO_SHA1);
+                if (!$signSuccess) {
+                    require_once 'Zend/Gdata/App/Exception.php';
+                    throw new Zend_Gdata_App_Exception(
+                            'openssl_signing failure - returned false');
+                }
+                // encode signature
+                $encodedSignature = base64_encode($signature);
+
+                // final header
+                $headers['authorization'] = 'AuthSub token="' . $this->getAuthSubToken() . '" ' .
+                                            'data="' . $dataToSign . '" ' .
+                                            'sig="' . $encodedSignature . '" ' .
+                                            'sigalg="rsa-sha1"';
+            } else {
+                // AuthSub without secure tokens
+                $headers['authorization'] = 'AuthSub token="' . $this->getAuthSubToken() . '"';
+            }
+        } elseif ($this->getClientLoginToken() != null) {
+            $headers['authorization'] = 'GoogleLogin auth=' . $this->getClientLoginToken();
+        }
+        return array('method' => $method, 'url' => $url, 'body' => $body, 'headers' => $headers, 'contentType' => $contentType);
+    }
+
+    /**
+     * Method for filtering the HTTP response, though no filtering is
+     * currently done.
+     *
+     * @param Zend_Http_Response $response The response object to filter
+     * @return Zend_Http_Response The filterd response object
+     */
+    public function filterHttpResponse($response) {
+        return $response;
+    }
+
+    /**
+     * Return the current connection adapter
+     *
+     * @return Zend_Http_Client_Adapter_Interface|string $adapter
+     */
+    public function getAdapter()
+    {
+        return $this->adapter;
+    }
+
+   /**
+     * Load the connection adapter
+     *
+     * @param Zend_Http_Client_Adapter_Interface $adapter
+     * @return void
+     */
+    public function setAdapter($adapter)
+    {
+        if ($adapter == null) {
+            $this->adapter = $adapter;
+        } else {
+              parent::setAdapter($adapter);
+        }
+    }
+
+    /**
+     * Set the streamingRequest variable which controls whether we are
+     * sending the raw (already encoded) POST data from a stream source.
+     *
+     * @param boolean $value The value to set.
+     * @return void
+     */
+    public function setStreamingRequest($value)
+    {
+        $this->_streamingRequest = $value;
+    }
+
+    /**
+     * Check whether the client is set to perform streaming requests.
+     *
+     * @return boolean True if yes, false otherwise.
+     */
+    public function getStreamingRequest()
+    {
+        if ($this->_streamingRequest()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Prepare the request body (for POST and PUT requests)
+     *
+     * @return string
+     * @throws Zend_Http_Client_Exception
+     */
+    protected function _prepareBody()
+    {
+        if($this->_streamingRequest) {
+            $this->setHeaders(self::CONTENT_LENGTH,
+                $this->raw_post_data->getTotalSize());
+            return $this->raw_post_data;
+        }
+        else {
+            return parent::_prepareBody();
+        }
+    }
+
+    /**
+     * Clear all custom parameters we set.
+     *
+     * @return Zend_Http_Client
+     */
+    public function resetParameters($clearAll = false)
+    {
+        $this->_streamingRequest = false;
+
+        return parent::resetParameters($clearAll);
+    }
+
+    /**
+     * Set the raw (already encoded) POST data from a stream source.
+     *
+     * This is used to support POSTing from open file handles without
+     * caching the entire body into memory. It is a wrapper around
+     * Zend_Http_Client::setRawData().
+     *
+     * @param string $data The request data
+     * @param string $enctype The encoding type
+     * @return Zend_Http_Client
+     */
+    public function setRawDataStream($data, $enctype = null)
+    {
+        $this->_streamingRequest = true;
+        return $this->setRawData($data, $enctype);
+    }
+
+}