static function parseXRDS($xml_string, $extra_ns_map = null)
{
$_null = null;
if (!$xml_string) {
return $_null;
}
$parser = Auth_Yadis_getXMLParser();
$ns_map = Auth_Yadis_getNSMap();
if ($extra_ns_map && is_array($extra_ns_map)) {
$ns_map = array_merge($ns_map, $extra_ns_map);
}
if (!($parser && $parser->init($xml_string, $ns_map))) {
return $_null;
}
// Try to get root element.
$root = $parser->evalXPath('/xrds:XRDS[1]');
if (!$root) {
return $_null;
}
if (is_array($root)) {
$root = $root[0];
}
$attrs = $parser->attributes($root);
if (array_key_exists('xmlns:xrd', $attrs) && $attrs['xmlns:xrd'] != Auth_Yadis_XMLNS_XRDS) {
return $_null;
} else {
if (array_key_exists('xmlns', $attrs) && preg_match('/xri/', $attrs['xmlns']) && $attrs['xmlns'] != Auth_Yadis_XMLNS_XRD_2_0) {
return $_null;
}
}
// Get the last XRD node.
$xrd_nodes = $parser->evalXPath('/xrds:XRDS[1]/xrd:XRD');
if (!$xrd_nodes) {
return $_null;
}
$xrds = new Auth_Yadis_XRDS($parser, $xrd_nodes);
return $xrds;
}
function query($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); }