Beispiel #1
0
function webfinger_content(&$a)
{
    $o .= '<h3>Webfinger Diagnostic</h3>';
    $o .= '<form action="webfinger" method="get">';
    $o .= 'Lookup address: <input type="text" style="width: 250px;" name="addr" value="' . $_GET['addr'] . '" />';
    $o .= '<input type="submit" name="submit" value="Submit" /></form>';
    $o .= '<br /><br />';
    if (x($_GET, 'addr')) {
        $addr = trim($_GET['addr']);
        if (strpos($addr, '@' !== false)) {
            $res = webfinger($addr);
        } else {
            $res = lrdd($addr);
        }
        $o .= '<pre>';
        $o .= str_replace("\n", '<br />', print_r($res, true));
        $o .= '</pre>';
    }
    return $o;
}
Beispiel #2
0
 function lrdd($uri)
 {
     $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);
     $h = parse_xml_string($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: ' . $e);
         }
         if ($dom) {
             $items = $dom->getElementsByTagName('link');
             foreach ($items as $item) {
                 $x = $item->getAttribute('rel');
                 if ($x == "lrdd") {
                     $pagelink = $item->getAttribute('href');
                     break;
                 }
             }
         }
     }
     if (isset($pagelink)) {
         return fetch_xrd_links($pagelink);
     }
     // next look in HTTP headers
     $lines = explode("\n", $headers);
     if (count($lines)) {
         foreach ($lines as $line) {
             // TODO alter the following regex to support multiple relations (space separated)
             if (stristr($line, 'link:') && preg_match('/<([^>].*)>.*rel\\=[\'\\"]lrdd[\'\\"]/', $line, $matches)) {
                 $pagelink = $matches[1];
                 break;
             }
             // don't try and run feeds through the html5 parser
             if (stristr($line, 'content-type:') && (stristr($line, 'application/atom+xml') || stristr($line, 'application/rss+xml'))) {
                 return array();
             }
             if (stristr($html, '<rss') || stristr($html, '<feed')) {
                 return array();
             }
         }
     }
     if (isset($pagelink)) {
         return fetch_xrd_links($pagelink);
     }
     // If we haven't found any links, return the host xrd links (which we have already fetched)
     if (isset($links)) {
         return $links;
     }
     return array();
 }