Implemented WebFinger and replaced our XRD with PEAR XML_XRD

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

diff --git a/plugins/LRDD/lib/lrddmethod/hostmeta.php b/plugins/LRDD/lib/lrddmethod/hostmeta.php
new file mode 100644 (file)
index 0000000..0bd9117
--- /dev/null
+++ b/plugins/LRDD/lib/lrddmethod/hostmeta.php
@@ -0,0 +1,60 @@
+<?php
+/**
+ * Implementation of discovery using host-meta file
+ *
+ * Discovers resource descriptor file for a user by going to the
+ * organization's host-meta file and trying to find a template for LRDD.
+ *
+ * @category  Discovery
+ * @package   StatusNet
+ * @author    James Walker <james@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+class LRDDMethod_HostMeta extends LRDDMethod
+{
+    /**
+     * For RFC6415 and HTTP URIs, fetch the host-meta file
+     * and look for LRDD templates
+     */
+    public function discover($uri)
+    {
+        // This is allowed for RFC6415 but not the 'WebFinger' RFC7033.
+        $try_schemes = array('https', 'http');
+
+        $scheme = mb_strtolower(parse_url($uri, PHP_URL_SCHEME));
+        switch ($scheme) {
+        case 'acct':
+            if (!Discovery::isAcct($uri)) {
+                throw new Exception('Bad resource URI: '.$uri);
+            }
+            // We can't use parse_url data for this, since the 'host'
+            // entry is only set if the scheme has '://' after it.
+            list($user, $domain) = explode('@', parse_url($uri, PHP_URL_PATH));
+            break;
+        case 'http':
+        case 'https':
+            $domain = mb_strtolower(parse_url($uri, PHP_URL_HOST));
+            $try_schemes = array($scheme);
+            break;
+        default:
+            throw new Exception('Unable to discover resource descriptor endpoint.');
+        }
+
+        foreach ($try_schemes as $scheme) {
+            $url = $scheme . '://' . $domain . '/.well-known/host-meta';
+            
+            try {
+                $response = self::fetchUrl($url);
+                $this->xrd->loadString($response->getBody());
+            } catch (Exception $e) {
+                common_debug('LRDD could not load resource descriptor: '.$url.' ('.$e->getMessage().')');
+                continue;
+            }
+            return $this->xrd->links;
+        }
+
+        throw new Exception('Unable to retrieve resource descriptor links.');
+    }
+}