1 files changed, 72 insertions, 0 deletions
diff --git a/plugins/openid/lib/Auth/Yadis/XRIRes.php b/plugins/openid/lib/Auth/Yadis/XRIRes.php
new file mode 100644
index 00000000..5e115873
--- /dev/null
+++ b/plugins/openid/lib/Auth/Yadis/XRIRes.php
@@ -0,0 +1,72 @@
+<?php
+
+/**
+ * Code for using a proxy XRI resolver.
+ */
+
+require_once 'Auth/Yadis/XRDS.php';
+require_once 'Auth/Yadis/XRI.php';
+
+class Auth_Yadis_ProxyResolver {
+    function Auth_Yadis_ProxyResolver($fetcher, $proxy_url = null)
+    {
+        $this->fetcher = $fetcher;
+        $this->proxy_url = $proxy_url;
+        if (!$this->proxy_url) {
+            $this->proxy_url = Auth_Yadis_getDefaultProxy();
+        }
+    }
+
+    function queryURL($xri, $service_type = null)
+    {
+        // trim off the xri:// prefix
+        $qxri = substr(Auth_Yadis_toURINormal($xri), 6);
+        $hxri = $this->proxy_url . $qxri;
+        $args = array(
+                      '_xrd_r' => 'application/xrds+xml'
+                      );
+
+        if ($service_type) {
+            $args['_xrd_t'] = $service_type;
+        } else {
+            // Don't perform service endpoint selection.
+            $args['_xrd_r'] .= ';sep=false';
+        }
+
+        $query = Auth_Yadis_XRIAppendArgs($hxri, $args);
+        return $query;
+    }
+
+    function query($xri, $service_types, $filters = array())
+    {
+        $services = array();
+        $canonicalID = null;
+        foreach ($service_types as $service_type) {
+            $url = $this->queryURL($xri, $service_type);
+            $response = $this->fetcher->get($url);
+            if ($response->status != 200 and $response->status != 206) {
+                continue;
+            }
+            $xrds = Auth_Yadis_XRDS::parseXRDS($response->body);
+            if (!$xrds) {
+                continue;
+            }
+            $canonicalID = Auth_Yadis_getCanonicalID($xri,
+                                                         $xrds);
+
+            if ($canonicalID === false) {
+                return null;
+            }
+
+            $some_services = $xrds->services($filters);
+            $services = array_merge($services, $some_services);
+            // TODO:
+            //  * If we do get hits for multiple service_types, we're
+            //    almost certainly going to have duplicated service
+            //    entries and broken priority ordering.
+        }
+        return array($canonicalID, $services);
+    }
+}
+
+