/**
* For RFC6415 and HTTP URIs, fetch the host-meta file
* and look for LRDD templates
*/
public function discover($uri)
{
// This is allowed for RFC6415 but not the 'WebFinger' RFC7033.
$try_schemes = array('https', 'http');
$scheme = mb_strtolower(parse_url($uri, PHP_URL_SCHEME));
switch ($scheme) {
case 'acct':
if (!Discovery::isAcct($uri)) {
throw new Exception('Bad resource URI: ' . $uri);
}
// We can't use parse_url data for this, since the 'host'
// entry is only set if the scheme has '://' after it.
list($user, $domain) = explode('@', parse_url($uri, PHP_URL_PATH));
break;
case 'http':
case 'https':
$domain = mb_strtolower(parse_url($uri, PHP_URL_HOST));
$try_schemes = array($scheme);
break;
default:
throw new Exception('Unable to discover resource descriptor endpoint.');
}
foreach ($try_schemes as $scheme) {
$url = $scheme . '://' . $domain . '/.well-known/host-meta';
try {
$response = self::fetchUrl($url);
$this->xrd->loadString($response->getBody());
} catch (Exception $e) {
common_debug('LRDD could not load resource descriptor: ' . $url . ' (' . $e->getMessage() . ')');
continue;
}
return $this->xrd->links;
}
throw new Exception('Unable to retrieve resource descriptor links.');
}
/**
* Simply returns the WebFinger URL over HTTPS at the uri's domain:
* https://{domain}/.well-known/webfinger?resource={uri}
*/
public function discover($uri)
{
if (!Discovery::isAcct($uri)) {
throw new Exception('Bad resource URI: ' . $uri);
}
list($user, $domain) = explode('@', parse_url($uri, PHP_URL_PATH));
if (!filter_var($domain, FILTER_VALIDATE_IP) && !filter_var(gethostbyname($domain), FILTER_VALIDATE_IP)) {
throw new Exception('Bad resource host.');
}
$link = new XML_XRD_Element_Link(Discovery::LRDD_REL, 'https://' . $domain . '/.well-known/webfinger?resource={uri}', Discovery::JRD_MIMETYPE, true);
//isTemplate
return array($link);
}
public function onEndGetWebFingerResource($resource, WebFingerResource &$target = null, array $args = array())
{
$profile = null;
if (Discovery::isAcct($resource)) {
$parts = explode('@', substr(urldecode($resource), 5));
// 5 is strlen of 'acct:'
if (count($parts) == 2) {
list($nick, $domain) = $parts;
if ($domain === common_config('site', 'server')) {
$nick = common_canonical_nickname($nick);
$user = User::getKV('nickname', $nick);
if (!$user instanceof User) {
throw new NoSuchUserException(array('nickname' => $nick));
}
$profile = $user->getProfile();
} else {
throw new Exception(_('Remote profiles not supported via WebFinger yet.'));
}
}
} else {
$user = User::getKV('uri', $resource);
if ($user instanceof User) {
$profile = $user->getProfile();
} else {
// try and get it by profile url
$profile = Profile::getKV('profileurl', $resource);
}
}
if ($profile instanceof Profile) {
$target = new WebFingerResource_Profile($profile);
return false;
// We got our target, stop handler execution
}
$notice = Notice::getKV('uri', $resource);
if ($notice instanceof Notice) {
$target = new WebFingerResource_Notice($notice);
return false;
}
return true;
}
