-
-if(! function_exists('webfinger')) {
-function webfinger($s, $debug = false) {
- $host = '';
- if(strstr($s,'@')) {
- $host = substr($s,strpos($s,'@') + 1);
- }
- if(strlen($host)) {
- $tpl = fetch_lrdd_template($host);
- logger('webfinger: lrdd template: ' . $tpl);
- if(strlen($tpl)) {
- $pxrd = str_replace('{uri}', urlencode('acct:' . $s), $tpl);
- logger('webfinger: pxrd: ' . $pxrd);
- $links = fetch_xrd_links($pxrd);
- if(! count($links)) {
- // try with double slashes
- $pxrd = str_replace('{uri}', urlencode('acct://' . $s), $tpl);
- logger('webfinger: pxrd: ' . $pxrd);
- $links = fetch_xrd_links($pxrd);
- }
- return $links;
- }
- }
- return array();
-}}
-
-if(! function_exists('lrdd')) {
-function lrdd($uri, $debug = false) {
-
- $a = get_app();
-
- // default priority is host priority, host-meta first
-
- $priority = 'host';
-
- // All we have is an email address. Resource-priority is irrelevant
- // because our URI isn't directly resolvable.
-
- if(strstr($uri,'@')) {
- return(webfinger($uri));
- }
-
- // get the host meta file
-
- $host = @parse_url($uri);
-
- if($host) {
- $url = ((x($host,'scheme')) ? $host['scheme'] : 'http') . '://';
- $url .= $host['host'] . '/.well-known/host-meta' ;
- }
- else
- return array();
-
- logger('lrdd: constructed url: ' . $url);
-
- $xml = fetch_url($url);
-
- $headers = $a->get_curl_headers();
-
- if (! $xml)
- return array();
-
- logger('lrdd: host_meta: ' . $xml, LOGGER_DATA);
-
- if(! stristr($xml,'<xrd'))
- return array();
-
- $h = parse_xml_string($xml);
- if(! $h)
- return array();
-
- $arr = convert_xml_element_to_array($h);
-
- if(isset($arr['xrd']['property'])) {
- $property = $arr['crd']['property'];
- if(! isset($property[0]))
- $properties = array($property);
- else
- $properties = $property;
- foreach($properties as $prop)
- if((string) $prop['@attributes'] === 'http://lrdd.net/priority/resource')
- $priority = 'resource';
- }
-
- // save the links in case we need them
-
- $links = array();
-
- if(isset($arr['xrd']['link'])) {
- $link = $arr['xrd']['link'];
- if(! isset($link[0]))
- $links = array($link);
- else
- $links = $link;
- }
-
- // do we have a template or href?
-
- if(count($links)) {
- foreach($links as $link) {
- if($link['@attributes']['rel'] && attribute_contains($link['@attributes']['rel'],'lrdd')) {
- if(x($link['@attributes'],'template'))
- $tpl = $link['@attributes']['template'];
- elseif(x($link['@attributes'],'href'))
- $href = $link['@attributes']['href'];
- }
- }
- }
-
- if((! isset($tpl)) || (! strpos($tpl,'{uri}')))
- $tpl = '';
-
- if($priority === 'host') {
- if(strlen($tpl))
- $pxrd = str_replace('{uri}', urlencode($uri), $tpl);
- elseif(isset($href))
- $pxrd = $href;
- if(isset($pxrd)) {
- logger('lrdd: (host priority) pxrd: ' . $pxrd);
- $links = fetch_xrd_links($pxrd);
- return $links;
- }
-
- $lines = explode("\n",$headers);
- if(count($lines)) {
- foreach($lines as $line) {
- if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) {
- return(fetch_xrd_links($matches[1]));
- break;
- }
- }
- }
- }
-
-
- // priority 'resource'
-
-
- $html = fetch_url($uri);
- $headers = $a->get_curl_headers();
- logger('lrdd: headers=' . $headers, LOGGER_DEBUG);
-
- // don't try and parse raw xml as html
- if(! strstr($html,'<?xml')) {
- require_once('library/HTML5/Parser.php');
-
- try {
- $dom = HTML5_Parser::parse($html);
- } catch (DOMException $e) {
- logger('lrdd: parse error: ' . $e);
- }
-
- if(isset($dom) && $dom) {
- $items = $dom->getElementsByTagName('link');
- foreach($items as $item) {
- $x = $item->getAttribute('rel');
- if($x == "lrdd") {
- $pagelink = $item->getAttribute('href');
- break;
- }
- }
- }