function find_identity_info($identity_url)
{
// Returns (consumer_id, server_id, server_url) or null if no
// server found. Fetch url and parse openid.server and
// potentially openid.delegate urls. consumer_id is the identity
// url the consumer should use. It is the url after following
// any redirects the url passed in might use. server_id is the
// url actually sent to the server to verify, and may be the
// result of finding a delegate link.
$url = OpenIDConsumerHelper::normalize_url($identity_url);
$ret = $this->http_client->get($url);
if (!$ret) {
return null;
}
list($consumer_id, $data) = $ret;
$server = null;
$delegate = null;
$link_attrs = oidParse::parseLinkAttrs($data);
foreach ($link_attrs as $attrs) {
$rel = isset($attrs['rel']) ? $attrs['rel'] : null;
if ($rel == 'openid.server' && !$server) {
$href = isset($attrs['href']) ? $attrs['href'] : null;
if ($href) {
$server = $href;
}
}
if ($rel == 'openid.delegate' && !$delegate) {
$href = isset($attrs['href']) ? $attrs['href'] : null;
if ($href) {
$delegate = $href;
}
}
}
if (!$server) {
return null;
}
if ($delegate) {
$server_id = $delegate;
} else {
$server_id = $consumer_id;
}
return array($consumer_id, $server_id, $server);
}
function _parseLinkAttrsWithTidy2($html)
{
$tree = tidy_parse_string($html);
$tags = null;
return oidParse::_parseLinkAttrsWithTidy2Worker($tree->html(), $tags);
}
