plugins/LRDD/lib/lrddmethod/webfinger.php

   1 <?php
   2 /**
   3  * Implementation of WebFinger resource discovery (RFC7033)
   4  *
   5  * @category  Discovery
   6  * @package   GNUsocial
   7  * @author    Mikael Nordfeldth <mmn@hethane.se>
   8  * @copyright 2013 Free Software Foundation, Inc.
   9  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
  10  * @link      http://status.net/
  11  */
  12 class LRDDMethod_WebFinger extends LRDDMethod
  13 {
  14     /**
  15      * Simply returns the WebFinger URL over HTTPS at the uri's domain:
  16      * https://{domain}/.well-known/webfinger?resource={uri}
  17      */
  18     public function discover($uri)
  19     {
  20         if (!Discovery::isAcct($uri)) {
  21             throw new Exception('Bad resource URI: '.$uri);
  22         }
  23         list($user, $domain) = explode('@', parse_url($uri, PHP_URL_PATH));
  24         if (!filter_var($domain, FILTER_VALIDATE_IP)
  25                 && !filter_var(gethostbyname($domain), FILTER_VALIDATE_IP)) {
  26             throw new Exception('Bad resource host.');
  27         }
  28
  29         $link = new XML_XRD_Element_Link(
  30                         Discovery::LRDD_REL,
  31                         'https://' . $domain . '/.well-known/webfinger?resource={uri}',
  32                         Discovery::JRD_MIMETYPE,
  33                         true);  //isTemplate
  34
  35         return array($link);
  36     }
  37 }