diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Feed/Pubsubhubbub.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Feed/Pubsubhubbub.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,153 @@
+<?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_Feed_Pubsubhubbub
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Pubsubhubbub.php 20785 2010-01-31 09:43:03Z mikaelkael $
+ */
+
+/**
+ * @see Zend_Http_Client
+ */
+require_once 'Zend/Http/Client.php';
+
+/**
+ * @see Zend_Uri
+ */
+require_once 'Zend/Uri.php';
+
+/**
+ * @see Zend_Version
+ */
+require_once 'Zend/Version.php';
+
+/**
+ * @see Zend_Feed_Reader
+ */
+require_once 'Zend/Feed/Reader.php';
+
+/**
+ * @see Zend_Feed_Abstract
+ */
+require_once 'Zend/Feed/Abstract.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Feed_Pubsubhubbub
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Feed_Pubsubhubbub
+{
+    /**
+     * Verification Modes
+     */
+    const VERIFICATION_MODE_SYNC  = 'sync';
+    const VERIFICATION_MODE_ASYNC = 'async';
+    
+    /**
+     * Subscription States
+     */
+    const SUBSCRIPTION_VERIFIED    = 'verified';
+    const SUBSCRIPTION_NOTVERIFIED = 'not_verified';
+    const SUBSCRIPTION_TODELETE    = 'to_delete';
+
+    /**
+     * Singleton instance if required of the HTTP client
+     *
+     * @var Zend_Http_Client
+     */
+    protected static $httpClient = null;
+
+    /**
+     * Simple utility function which imports any feed URL and
+     * determines the existence of Hub Server endpoints. This works
+     * best if directly given an instance of Zend_Feed_Reader_Atom|Rss
+     * to leverage off.
+     *
+     * @param  Zend_Feed_Reader_FeedAbstract|Zend_Feed_Abstract|string $source
+     * @return array
+     */
+    public static function detectHubs($source)
+    {
+        if (is_string($source)) {
+            $feed = Zend_Feed_Reader::import($source);
+        } elseif (is_object($source) && $source instanceof Zend_Feed_Reader_FeedAbstract) {
+            $feed = $source;
+        } elseif (is_object($source) && $source instanceof Zend_Feed_Abstract) {
+            $feed = Zend_Feed_Reader::importFeed($source);
+        } else {
+            require_once 'Zend/Feed/Pubsubhubbub/Exception.php';
+            throw new Zend_Feed_Pubsubhubbub_Exception('The source parameter was'
+            . ' invalid, i.e. not a URL string or an instance of type'
+            . ' Zend_Feed_Reader_FeedAbstract or Zend_Feed_Abstract');
+        }
+        return $feed->getHubs();
+    }
+
+    /**
+     * Allows the external environment to make Zend_Oauth use a specific
+     * Client instance.
+     *
+     * @param  Zend_Http_Client $httpClient
+     * @return void
+     */
+    public static function setHttpClient(Zend_Http_Client $httpClient)
+    {
+        self::$httpClient = $httpClient;
+    }
+
+    /**
+     * Return the singleton instance of the HTTP Client. Note that
+     * the instance is reset and cleared of previous parameters GET/POST.
+     * Headers are NOT reset but handled by this component if applicable.
+     *
+     * @return Zend_Http_Client
+     */
+    public static function getHttpClient()
+    {
+        if (!isset(self::$httpClient)):
+            self::$httpClient = new Zend_Http_Client;
+        else:
+            self::$httpClient->resetParameters();
+        endif;
+        return self::$httpClient;
+    }
+
+    /**
+     * Simple mechanism to delete the entire singleton HTTP Client instance
+     * which forces an new instantiation for subsequent requests.
+     *
+     * @return void
+     */
+    public static function clearHttpClient()
+    {
+        self::$httpClient = null;
+    }
+
+    /**
+     * RFC 3986 safe url encoding method
+     *
+     * @param  string $string
+     * @return string
+     */
+    public static function urlencode($string)
+    {
+        $rawencoded = rawurlencode($string);
+        $rfcencoded = str_replace('%7E', '~', $rawencoded);
+        return $rfcencoded;
+    }
+}