forked from GNUsocial/gnu-social
152 lines
3.9 KiB
PHP
152 lines
3.9 KiB
PHP
<?php
|
|
/**
|
|
* StatusNet - the distributed open-source microblogging tool
|
|
* Copyright (C) 2010, StatusNet, Inc.
|
|
*
|
|
* A sample module to show best practices for StatusNet plugins
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* @package StatusNet
|
|
* @author James Walker <james@status.net>
|
|
* @copyright 2010 StatusNet, Inc.
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
|
|
define('WEBFINGER_SERVICE_REL_VALUE', 'lrdd');
|
|
|
|
/**
|
|
* Implement the webfinger protocol.
|
|
*/
|
|
|
|
class Webfinger
|
|
{
|
|
const PROFILEPAGE = 'http://webfinger.net/rel/profile-page';
|
|
const UPDATESFROM = 'http://schemas.google.com/g/2010#updates-from';
|
|
|
|
/**
|
|
* Perform a webfinger lookup given an account.
|
|
*/
|
|
|
|
public function lookup($id)
|
|
{
|
|
$id = $this->normalize($id);
|
|
list($name, $domain) = explode('@', $id);
|
|
|
|
$links = $this->getServiceLinks($domain);
|
|
if (!$links) {
|
|
return false;
|
|
}
|
|
|
|
$services = array();
|
|
foreach ($links as $link) {
|
|
if ($link['template']) {
|
|
return $this->getServiceDescription($link['template'], $id);
|
|
}
|
|
if ($link['href']) {
|
|
return $this->getServiceDescription($link['href'], $id);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Normalize an account ID
|
|
*/
|
|
function normalize($id)
|
|
{
|
|
if (substr($id, 0, 7) == 'acct://') {
|
|
return substr($id, 7);
|
|
} else if (substr($id, 0, 5) == 'acct:') {
|
|
return substr($id, 5);
|
|
}
|
|
|
|
return $id;
|
|
}
|
|
|
|
function getServiceLinks($domain)
|
|
{
|
|
$url = 'http://'. $domain .'/.well-known/host-meta';
|
|
$content = $this->fetchURL($url);
|
|
if (empty($content)) {
|
|
common_log(LOG_DEBUG, 'Error fetching host-meta');
|
|
return false;
|
|
}
|
|
$result = XRD::parse($content);
|
|
|
|
// Ensure that the host == domain (spec may include signing later)
|
|
if ($result->host != $domain) {
|
|
return false;
|
|
}
|
|
|
|
$links = array();
|
|
foreach ($result->links as $link) {
|
|
if ($link['rel'] == WEBFINGER_SERVICE_REL_VALUE) {
|
|
$links[] = $link;
|
|
}
|
|
|
|
}
|
|
return $links;
|
|
}
|
|
|
|
function getServiceDescription($template, $id)
|
|
{
|
|
$url = $this->applyTemplate($template, 'acct:' . $id);
|
|
|
|
$content = $this->fetchURL($url);
|
|
|
|
if (!$content) {
|
|
return false;
|
|
}
|
|
|
|
return XRD::parse($content);
|
|
}
|
|
|
|
function fetchURL($url)
|
|
{
|
|
try {
|
|
$client = new HTTPClient();
|
|
$response = $client->get($url);
|
|
} catch (HTTP_Request2_Exception $e) {
|
|
return false;
|
|
}
|
|
|
|
if ($response->getStatus() != 200) {
|
|
return false;
|
|
}
|
|
|
|
return $response->getBody();
|
|
}
|
|
|
|
function applyTemplate($template, $id)
|
|
{
|
|
$template = str_replace('{uri}', urlencode($id), $template);
|
|
|
|
return $template;
|
|
}
|
|
|
|
function getHostMeta($domain, $template) {
|
|
$xrd = new XRD();
|
|
$xrd->host = $domain;
|
|
$xrd->links[] = array('rel' => 'lrdd',
|
|
'template' => $template,
|
|
'title' => array('Resource Descriptor'));
|
|
|
|
return $xrd->toXML();
|
|
}
|
|
}
|
|
|