gnu-social/plugins/WebFinger/WebFingerPlugin.php

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<?php
/*
* GNU Social - a federating social network
* Copyright (C) 2013, Free Software Foundation, Inc.
*
* 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/>.
*/
/**
* Implements WebFinger for GNU Social, as well as support for the
* '.well-known/host-meta' resource.
*
* Depends on: LRDD plugin
*
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* @package GNUsocial
* @author Mikael Nordfeldth <mmn@hethane.se>
*/
if (!defined('GNUSOCIAL')) { exit(1); }
class WebFingerPlugin extends Plugin
{
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const OAUTH_ACCESS_TOKEN_REL = 'http://apinamespace.org/oauth/access_token';
const OAUTH_REQUEST_TOKEN_REL = 'http://apinamespace.org/oauth/request_token';
const OAUTH_AUTHORIZE_REL = 'http://apinamespace.org/oauth/authorize';
public $http_alias = false;
public $fancyurlfix = true; // adds + interprets some extra aliases related to 'index.php/' URLs
public function initialize()
{
common_config_set('webfinger', 'http_alias', $this->http_alias);
common_config_set('webfinger', 'fancyurlfix', $this->fancyurlfix);
}
public function onRouterInitialized($m)
{
$m->connect('.well-known/host-meta', array('action' => 'hostmeta'));
$m->connect('.well-known/host-meta.:format',
array('action' => 'hostmeta',
'format' => '(xml|json)'));
// the resource GET parameter can be anywhere, so don't mention it here
$m->connect('.well-known/webfinger', array('action' => 'webfinger'));
$m->connect('.well-known/webfinger.:format',
array('action' => 'webfinger',
'format' => '(xml|json)'));
$m->connect('main/ownerxrd', array('action' => 'ownerxrd'));
return true;
}
public function onLoginAction($action, &$login)
{
switch ($action) {
case 'hostmeta':
case 'webfinger':
$login = true;
return false;
}
return true;
}
public function onStartGetProfileAcctUri(Profile $profile, &$acct)
{
$wfr = new WebFingerResource_Profile($profile);
try {
$acct = $wfr->reconstructAcct();
} catch (Exception $e) {
return true;
}
return false;
}
public function onEndGetWebFingerResource($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 {
try {
$user = User::getByUri($resource);
$profile = $user->getProfile();
} catch (NoResultException $e) {
if (common_config('webfinger', 'fancyurlfix')) {
try {
try { // if it's a /index.php/ url
// common_fake_local_fancy_url can throw an exception
$alt_url = common_fake_local_fancy_url($resource);
} catch (Exception $e) { // let's try to create a fake local /index.php/ url
// this too if it can't do anything about the URL
$alt_url = common_fake_local_nonfancy_url($resource);
}
// and this will throw a NoResultException if not found
$user = User::getByUri($alt_url);
$profile = $user->getProfile();
} catch (Exception $e) {
// apparently we didn't get any matches with that, so continue...
}
}
}
}
// if we still haven't found a match...
if (!$profile instanceof Profile) {
// if our rewrite hack didn't work, try to get something 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;
}
public function onStartHostMetaLinks(array &$links)
{
foreach (Discovery::supportedMimeTypes() as $type) {
$links[] = new XML_XRD_Element_Link(Discovery::LRDD_REL,
common_local_url('webfinger') . '?resource={uri}',
$type,
true); // isTemplate
}
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// OAuth connections
$links[] = new XML_XRD_Element_link(self::OAUTH_ACCESS_TOKEN_REL, common_local_url('ApiOAuthAccessToken'));
$links[] = new XML_XRD_Element_link(self::OAUTH_REQUEST_TOKEN_REL, common_local_url('ApiOAuthRequestToken'));
$links[] = new XML_XRD_Element_link(self::OAUTH_AUTHORIZE_REL, common_local_url('ApiOAuthAuthorize'));
}
/**
* Add a link header for LRDD Discovery
*/
public function onStartShowHTML($action)
{
if ($action instanceof ShowstreamAction) {
$resource = $action->getTarget()->getUri();
$url = common_local_url('webfinger') . '?resource='.urlencode($resource);
foreach (array(Discovery::JRD_MIMETYPE, Discovery::XRD_MIMETYPE) as $type) {
header('Link: <'.$url.'>; rel="'. Discovery::LRDD_REL.'"; type="'.$type.'"', false);
}
}
}
public function onPluginVersion(array &$versions)
{
$versions[] = array('name' => 'WebFinger',
'version' => GNUSOCIAL_VERSION,
'author' => 'Mikael Nordfeldth',
'homepage' => 'http://www.gnu.org/software/social/',
// TRANS: Plugin description.
'rawdescription' => _m('Adds WebFinger lookup to GNU Social'));
return true;
}
}