Implemented WebFinger and replaced our XRD with PEAR XML_XRD

[quix0rs-gnu-social.git] / plugins / LRDD / lib / lrddmethod / webfinger.php

diff --git a/plugins/LRDD/lib/lrddmethod/webfinger.php b/plugins/LRDD/lib/lrddmethod/webfinger.php
new file mode 100644 (file)
index 0000000..a38e025
--- /dev/null
+++ b/plugins/LRDD/lib/lrddmethod/webfinger.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * Implementation of WebFinger resource discovery (RFC7033)
+ *
+ * @category  Discovery
+ * @package   GNUSocial
+ * @author    Mikael Nordfeldth <mmn@hethane.se>
+ * @copyright 2013 Free Software Foundation, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+class LRDDMethod_WebFinger extends LRDDMethod
+{
+    /**
+     * Simply returns the WebFinger URL over HTTPS at the uri's domain:
+     * https://{domain}/.well-known/webfinger?resource={uri}
+     */
+    public function discover($uri)
+    {
+        if (!Discovery::isAcct($uri)) {
+            throw new Exception('Bad resource URI: '.$uri);
+        }
+        list($user, $domain) = explode('@', parse_url($uri, PHP_URL_PATH));
+        if (!filter_var($domain, FILTER_VALIDATE_IP)
+                && !filter_var(gethostbyname($domain), FILTER_VALIDATE_IP)) {
+            throw new Exception('Bad resource host.');
+        }
+
+        $link = new XML_XRD_Element_Link(
+                        Discovery::LRDD_REL,
+                        'https://' . $domain . '/.well-known/webfinger?resource={uri}',
+                        Discovery::JRD_MIMETYPE,
+                        true);  //isTemplate
+
+        return array($link);
+    }
+}