Pull up the guts of my fixed bit.ly plugin from an old work branch (that had made other changes we weren't happy with in the plugin management). Now works if given a global API key.

plugins/BitlyUrl/BitlyUrlPlugin.php

@@ -2,7 +2,7 @@
 /**
  * StatusNet, the distributed open-source microblogging tool
  *
- * Plugin to push RSS/Atom updates to a PubSubHubBub hub
+ * Plugin to use bit.ly URL shortening services.
  *
  * PHP version 5
  *
@@ -22,7 +22,9 @@
  * @category  Plugin
  * @package   StatusNet
  * @author    Craig Andrews <candrews@integralblue.com>
+ * @author    Brion Vibber <brion@status.net>
  * @copyright 2009 Free Software Foundation, Inc http://www.fsf.org
+ * @copyright 2010 StatusNet, Inc http://status.net/
  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  * @link      http://status.net/
  */
@@ -35,26 +37,98 @@ require_once INSTALLDIR.'/plugins/UrlShortener/UrlShortenerPlugin.php';
 
 class BitlyUrlPlugin extends UrlShortenerPlugin
 {
-    public $serviceUrl;
+    public $shortenerName = 'bit.ly';
+    public $serviceUrl = 'http://bit.ly/api?method=shorten&version=2.0.1&longUrl=%s';
+    public $login;
+    public $apiKey;
 
     function onInitializePlugin(){
         parent::onInitializePlugin();
         if(!isset($this->serviceUrl)){
-            throw new Exception(_m("You must specify a serviceUrl."));
+            throw new Exception(_m("You must specify a serviceUrl for bit.ly shortening."));
+        }
+        if(!isset($this->login)){
+            throw new Exception(_m("You must specify a login name for bit.ly shortening."));
+        }
+        if(!isset($this->login)){
+            throw new Exception(_m("You must specify an API key for bit.ly shortening."));
         }
     }
 
+    /**
+     * Short a URL
+     * @param url
+     * @return string shortened version of the url, or null if URL shortening failed
+     */
     protected function shorten($url) {
-        $response = $this->http_get($url);
+        $response = $this->query($url);
-        if(!$response) return;
+        if ($this->isOk($url, $response)) {
-        return current(json_decode($response)->results)->hashUrl;
+            return $this->decode($url, $response->getBody());
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Inject API key into query before sending out...
+     *
+     * @param string $url
+     * @return HTTPResponse
+     */
+    protected function query($url)
+    {
+        // http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/shorten
+        $params = http_build_query(array(
+            'login' => $this->login,
+            'apiKey' => $this->apiKey), '', '&');
+        $serviceUrl = sprintf($this->serviceUrl, $url) . '&' . $params;
+
+        $request = HTTPClient::start();
+        return $request->get($serviceUrl);
+    }
+
+    /**
+     * JSON decode for API result
+     */
+    protected function decode($url, $body)
+    {
+        $json = json_decode($body, true);
+        return $json['results'][$url]['shortUrl'];
+    }
+
+    /**
+     * JSON decode for API result
+     */
+    protected function isOk($url, $response)
+    {
+        $code = 'unknown';
+        $msg = '';
+        if ($response->isOk()) {
+            $body = $response->getBody();
+            common_log(LOG_INFO, $body);
+            $json = json_decode($body, true);
+            if ($json['statusCode'] == 'OK') {
+                $data = $json['results'][$url];
+                if (isset($data['shortUrl'])) {
+                    return true;
+                } else if (isset($data['statusCode']) && $data['statusCode'] == 'ERROR') {
+                    $code = $data['errorCode'];
+                    $msg = $data['errorMessage'];
+                }
+            } else if ($json['statusCode'] == 'ERROR') {
+                $code = $json['errorCode'];
+                $msg = $json['errorMessage'];
+            }
+            common_log(LOG_ERR, "bit.ly returned error $code $msg for $url");
+        }
+        return false;
     }
 
     function onPluginVersion(&$versions)
     {
         $versions[] = array('name' => sprintf('BitlyUrl (%s)', $this->shortenerName),
                             'version' => STATUSNET_VERSION,
-                            'author' => 'Craig Andrews',
+                            'author' => 'Craig Andrews, Brion Vibber',
                             'homepage' => 'http://status.net/wiki/Plugin:BitlyUrl',
                             'rawdescription' =>
                             sprintf(_m('Uses <a href="http://%1$s/">%1$s</a> URL-shortener service.'),