Auth_Yadis_ProxyResolver::query PHP Method

    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);
    }

function Auth_OpenID_discoverXRI($iname, $fetcher)
{
    $resolver = new Auth_Yadis_ProxyResolver($fetcher);
    list($canonicalID, $yadis_services) = $resolver->query($iname, Auth_OpenID_getOpenIDTypeURIs(), array('filter_MatchesAnyOpenIDType'));
    $openid_services = Auth_OpenID_makeOpenIDEndpoints($iname, $yadis_services);
    $openid_services = Auth_OpenID_getOPOrUserServices($openid_services);
    for ($i = 0; $i < count($openid_services); $i++) {
        $openid_services[$i]->canonicalID = $canonicalID;
        $openid_services[$i]->claimed_id = $canonicalID;
        $openid_services[$i]->display_identifier = $iname;
    }
    // FIXME: returned xri should probably be in some normal form
    return array($iname, $openid_services);
}