modules/openid/xrds.inc

<?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;
}
1	<?php
2	// $Id: xrds.inc,v 1.2 2007/10/15 09:40:42 goba Exp $
3
4	// Global variables to track parsing state
5	$xrds_open_elements = array();
6	$xrds_services = array();
7	$xrds_current_service = array();
8
9	/**
10	* Main entry point for parsing XRDS documents
11	*/
12	function xrds_parse($xml) {
13	global $xrds_services;
14
15	$parser = xml_parser_create_ns();
16	xml_set_element_handler($parser, '_xrds_element_start', '_xrds_element_end');
17	xml_set_character_data_handler($parser, '_xrds_cdata');
18
19	xml_parse($parser, $xml);
20	xml_parser_free($parser);
21
22	return $xrds_services;
23	}
24
25	/**
26	* Parser callback functions
27	*/
28	function _xrds_element_start(&$parser, $name, $attribs) {
29	global $xrds_open_elements;
30
31	$xrds_open_elements[] = _xrds_strip_namespace($name);
32	}
33
34	function _xrds_element_end(&$parser, $name) {
35	global $xrds_open_elements, $xrds_services, $xrds_current_service;
36
37	$name = _xrds_strip_namespace($name);
38	if ($name == 'SERVICE') {
39	if (in_array(OPENID_NS_2_0 . '/signon', $xrds_current_service['types']) \|\|
40	in_array(OPENID_NS_2_0 . '/server', $xrds_current_service['types'])) {
41	$xrds_current_service['version'] = 2;
42	}
43	elseif (in_array(OPENID_NS_1_1, $xrds_current_service['types']) \|\|
44	in_array(OPENID_NS_1_0, $xrds_current_service['types'])) {
45	$xrds_current_service['version'] = 1;
46	}
47	if (!empty($xrds_current_service['version'])) {
48	$xrds_services[] = $xrds_current_service;
49	}
50	$xrds_current_service = array();
51	}
52	array_pop($xrds_open_elements);
53	}
54
55	function _xrds_cdata(&$parser, $data) {
56	global $xrds_open_elements, $xrds_services, $xrds_current_service;
57	$path = strtoupper(implode('/', $xrds_open_elements));
58	switch ($path) {
59	case 'XRDS/XRD/SERVICE/TYPE':
60	$xrds_current_service['types'][] = $data;
61	break;
62	case 'XRDS/XRD/SERVICE/URI':
63	$xrds_current_service['uri'] = $data;
64	break;
65	case 'XRDS/XRD/SERVICE/DELEGATE':
66	$xrds_current_service['delegate'] = $data;
67	break;
68	case 'XRDS/XRD/SERVICE/LOCALID':
69	$xrds_current_service['localid'] = $data;
70	break;
71	}
72	}
73
74	function _xrds_strip_namespace($name) {
75	// Strip namespacing.
76	$pos = strrpos($name, ':');
77	if ($pos !== FALSE) {
78	$name = substr($name, $pos + 1, strlen($name));
79	}
80
81	return $name;
82	}