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<?php
// $Id: xrds.inc,v 1.2 2007/10/15 09:40:42 goba Exp $
// Global variables to track parsing state
$xrds_open_elements = array();
$xrds_services = array();
$xrds_current_service = array();
/**
* Main entry point for parsing XRDS documents
*/
function xrds_parse($xml) {
global $xrds_services;
$parser = xml_parser_create_ns();
xml_set_element_handler($parser, '_xrds_element_start', '_xrds_element_end');
xml_set_character_data_handler($parser, '_xrds_cdata');
xml_parse($parser, $xml);
xml_parser_free($parser);
return $xrds_services;
}
/**
* Parser callback functions
*/
function _xrds_element_start(&$parser, $name, $attribs) {
global $xrds_open_elements;
$xrds_open_elements[] = _xrds_strip_namespace($name);
}
function _xrds_element_end(&$parser, $name) {
global $xrds_open_elements, $xrds_services, $xrds_current_service;
$name = _xrds_strip_namespace($name);
if ($name == 'SERVICE') {
if (in_array(OPENID_NS_2_0 .'/signon', $xrds_current_service['types']) ||
in_array(OPENID_NS_2_0 .'/server', $xrds_current_service['types'])) {
$xrds_current_service['version'] = 2;
}
elseif (in_array(OPENID_NS_1_1, $xrds_current_service['types']) ||
in_array(OPENID_NS_1_0, $xrds_current_service['types'])) {
$xrds_current_service['version'] = 1;
}
if (!empty($xrds_current_service['version'])) {
$xrds_services[] = $xrds_current_service;
}
$xrds_current_service = array();
}
array_pop($xrds_open_elements);
}
function _xrds_cdata(&$parser, $data) {
global $xrds_open_elements, $xrds_services, $xrds_current_service;
$path = strtoupper(implode('/', $xrds_open_elements));
switch ($path) {
case 'XRDS/XRD/SERVICE/TYPE':
$xrds_current_service['types'][] = $data;
break;
case 'XRDS/XRD/SERVICE/URI':
$xrds_current_service['uri'] = $data;
break;
case 'XRDS/XRD/SERVICE/DELEGATE':
$xrds_current_service['delegate'] = $data;
break;
case 'XRDS/XRD/SERVICE/LOCALID':
$xrds_current_service['localid'] = $data;
break;
}
}
function _xrds_strip_namespace($name) {
// Strip namespacing.
$pos = strrpos($name, ':');
if ($pos !== FALSE) {
$name = substr($name, $pos + 1, strlen($name));
}
return $name;
}
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