292 lines
12 KiB
PHP
292 lines
12 KiB
PHP
<?php
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declare(strict_types = 1);
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// {{{ License
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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// }}}
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namespace Component\FreeNetwork;
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use App\Core\Event;
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use App\Entity\Activity;
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use function App\Core\I18n\_m;
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use App\Core\Log;
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use App\Core\Modules\Component;
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use App\Core\Router\RouteLoader;
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use App\Core\Router\Router;
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use App\Entity\Actor;
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use App\Entity\LocalUser;
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use App\Entity\Note;
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use App\Util\Common;
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use App\Util\Exception\ClientException;
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use App\Util\Exception\NoSuchActorException;
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use App\Util\Exception\ServerException;
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use App\Util\Nickname;
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use Component\FreeNetwork\Controller\HostMeta;
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use Component\FreeNetwork\Controller\OwnerXrd;
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use Component\FreeNetwork\Controller\Webfinger;
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use Component\FreeNetwork\Util\Discovery;
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use Component\FreeNetwork\Util\WebfingerResource;
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use Component\FreeNetwork\Util\WebfingerResource\WebfingerResourceActor;
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use Component\FreeNetwork\Util\WebfingerResource\WebfingerResourceNote;
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use Exception;
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use Plugin\ActivityPub\Entity\ActivitypubActivity;
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use Plugin\ActivityPub\Util\Response\TypeResponse;
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use Symfony\Component\HttpFoundation\JsonResponse;
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use Symfony\Component\HttpFoundation\Response;
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use XML_XRD_Element_Link;
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use function count;
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use function in_array;
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use const PREG_SET_ORDER;
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/**
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* Implements WebFinger (RFC7033) for GNU social, as well as Link-based Resource Descriptor Discovery based on RFC6415,
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* Web Host Metadata ('.well-known/host-meta') resource.
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*
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* @package GNUsocial
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*
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* @author Mikael Nordfeldth <mmn@hethane.se>
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* @author Diogo Peralta Cordeiro <mail@diogo.site>
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*/
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class FreeNetwork extends Component
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{
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public const PLUGIN_VERSION = '0.1.0';
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public const OAUTH_ACCESS_TOKEN_REL = 'http://apinamespace.org/oauth/access_token';
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public const OAUTH_REQUEST_TOKEN_REL = 'http://apinamespace.org/oauth/request_token';
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public const OAUTH_AUTHORIZE_REL = 'http://apinamespace.org/oauth/authorize';
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public function onAddRoute(RouteLoader $m): bool
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{
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$m->connect('freenetwork_hostmeta', '.well-known/host-meta', [HostMeta::class, 'handle']);
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$m->connect(
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'freenetwork_hostmeta_format',
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'.well-known/host-meta.:format',
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[HostMeta::class, 'handle'],
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['format' => '(xml|json)'],
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);
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// the resource GET parameter can be anywhere, so don't mention it here
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$m->connect('freenetwork_webfinger', '.well-known/webfinger', [Webfinger::class, 'handle']);
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$m->connect(
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'freenetwork_webfinger_format',
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'.well-known/webfinger.:format',
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[Webfinger::class, 'handle'],
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['format' => '(xml|json)'],
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);
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$m->connect('freenetwork_ownerxrd', 'main/ownerxrd', [OwnerXrd::class, 'handle']);
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return Event::next;
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}
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public function onStartGetProfileAcctUri(Actor $profile, &$acct): bool
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{
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$wfr = new WebFingerResourceActor($profile);
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try {
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$acct = $wfr->reconstructAcct();
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} catch (Exception) {
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return Event::next;
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}
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return Event::stop;
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}
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public function onEndGetWebFingerResource($resource, ?WebfingerResource &$target = null, array $args = [])
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{
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// * Either we didn't find the profile, then we want to make
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// the $profile variable null for clarity.
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// * Or we did find it but for a possibly malicious remote
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// user who might've set their profile URL to a Note URL
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// which would've caused a sort of DoS unless we continue
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// our search here by discarding the remote profile.
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$profile = null;
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if (Discovery::isAcct($resource)) {
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$parts = explode('@', mb_substr(urldecode($resource), 5)); // 5 is strlen of 'acct:'
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if (count($parts) == 2) {
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[$nick, $domain] = $parts;
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if ($domain !== $_ENV['SOCIAL_DOMAIN']) {
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throw new ServerException(_m('Remote profiles not supported via WebFinger yet.'));
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}
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$nick = Nickname::normalize(nickname: $nick, check_already_used: false, check_is_allowed: false);
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$freenetwork_actor = LocalUser::getWithPK(['nickname' => $nick]);
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if (!($freenetwork_actor instanceof LocalUser)) {
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throw new NoSuchActorException($nick);
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}
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$profile = $freenetwork_actor->getActor();
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}
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} else {
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try {
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if (Common::isValidHttpUrl($resource)) {
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// This means $resource is a valid url
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$resource_parts = parse_url($resource);
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// TODO: Use URLMatcher
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if ($resource_parts['host'] === $_ENV['SOCIAL_DOMAIN']) { // XXX: Common::config('site', 'server')) {
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$str = $resource_parts['path'];
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// actor_view_nickname
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$renick = '/\/@(' . Nickname::DISPLAY_FMT . ')\/?/m';
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// actor_view_id
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$reuri = '/\/actor\/(\d+)\/?/m';
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if (preg_match_all($renick, $str, $matches, PREG_SET_ORDER, 0) === 1) {
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$profile = LocalUser::getWithPK(['nickname' => $matches[0][1]])->getActor();
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} elseif (preg_match_all($reuri, $str, $matches, PREG_SET_ORDER, 0) === 1) {
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$profile = Actor::getById((int) $matches[0][1]);
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}
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}
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}
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} catch (NoSuchActorException $e) {
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// not a User, maybe a Note? we'll try that further down...
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// try {
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// Log::debug(__METHOD__ . ': Finding User_group URI for WebFinger lookup on resource==' . $resource);
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// $group = new User_group();
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// $group->whereAddIn('uri', array_keys($alt_urls), $group->columnType('uri'));
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// $group->limit(1);
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// if ($group->find(true)) {
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// $profile = $group->getProfile();
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// }
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// unset($group);
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// } catch (Exception $e) {
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// Log::error(get_class($e) . ': ' . $e->getMessage());
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// throw $e;
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// }
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}
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}
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if ($profile instanceof Actor) {
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Log::debug(__METHOD__ . ': Found Profile with ID==' . $profile->getID() . ' for resource==' . $resource);
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$target = new WebfingerResourceActor($profile);
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return Event::stop; // We got our target, stop handler execution
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}
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$APNote = ActivitypubActivity::getWithPK(['object_uri' => $resource]);
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if ($APNote instanceof ActivitypubActivity) {
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$target = new WebfingerResourceNote(Note::getWithPK(['id' => $APNote->getObjectId()]));
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return Event::stop; // We got our target, stop handler execution
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}
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return Event::next;
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}
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public function onStartHostMetaLinks(array &$links): bool
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{
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foreach (Discovery::supportedMimeTypes() as $type) {
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$links[] = new XML_XRD_Element_Link(
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Discovery::LRDD_REL,
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Router::url(id: 'freenetwork_webfinger', args: [], type: Router::ABSOLUTE_URL) . '?resource={uri}',
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$type,
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isTemplate: true,
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);
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}
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// TODO OAuth connections
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//$links[] = new XML_XRD_Element_link(self::OAUTH_ACCESS_TOKEN_REL, common_local_url('ApiOAuthAccessToken'));
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//$links[] = new XML_XRD_Element_link(self::OAUTH_REQUEST_TOKEN_REL, common_local_url('ApiOAuthRequestToken'));
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//$links[] = new XML_XRD_Element_link(self::OAUTH_AUTHORIZE_REL, common_local_url('ApiOAuthAuthorize'));
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return Event::next;
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}
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/**
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* Add a link header for LRDD Discovery
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*/
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public function onStartShowHTML($action): bool
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{
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if ($action instanceof ShowstreamAction) {
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$resource = $action->getTarget()->getUri();
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$url = common_local_url('webfinger') . '?resource=' . urlencode($resource);
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foreach ([Discovery::JRD_MIMETYPE, Discovery::XRD_MIMETYPE] as $type) {
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header('Link: <' . $url . '>; rel="' . Discovery::LRDD_REL . '"; type="' . $type . '"', false);
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}
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}
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return Event::next;
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}
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public function onStartDiscoveryMethodRegistration(Discovery $disco): bool
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{
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$disco->registerMethod('\Component\FreeNetwork\Util\LrddMethod\LrddMethodWebfinger');
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return Event::next;
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}
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public function onEndDiscoveryMethodRegistration(Discovery $disco): bool
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{
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$disco->registerMethod('\Component\FreeNetwork\Util\LrddMethod\LrddMethodHostMeta');
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$disco->registerMethod('\Component\FreeNetwork\Util\LrddMethod\LrddMethodLinkHeader');
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$disco->registerMethod('\Component\FreeNetwork\Util\LrddMethod\LrddMethodLinkHtml');
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return Event::next;
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}
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/**
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* @throws ClientException
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* @throws ServerException
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*/
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public function onControllerResponseInFormat(string $route, array $accept_header, array $vars, ?TypeResponse &$response = null): bool
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{
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if (!in_array($route, ['freenetwork_hostmeta', 'freenetwork_hostmeta_format', 'freenetwork_webfinger', 'freenetwork_webfinger_format', 'freenetwork_ownerxrd'])) {
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return Event::next;
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}
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$mimeType = array_intersect(array_values(Discovery::supportedMimeTypes()), $accept_header);
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/*
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* "A WebFinger resource MUST return a JRD as the representation
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* for the resource if the client requests no other supported
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* format explicitly via the HTTP "Accept" header. [...]
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* The WebFinger resource MUST silently ignore any requested
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* representations that it does not understand and support."
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* -- RFC 7033 (WebFinger)
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* http://tools.ietf.org/html/rfc7033
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*/
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$mimeType = count($mimeType) !== 0 ? array_pop($mimeType) : $vars['default_mimetype'];
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$headers = [];
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if (Common::config('discovery', 'cors')) {
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$headers['Access-Control-Allow-Origin'] = '*';
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}
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$headers['Content-Type'] = $mimeType;
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$response = match ($mimeType) {
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Discovery::XRD_MIMETYPE => new Response(content: $vars['xrd']->to('xml'), headers: $headers),
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Discovery::JRD_MIMETYPE, Discovery::JRD_MIMETYPE_OLD => new JsonResponse(data: $vars['xrd']->to('json'), headers: $headers, json: true),
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};
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return Event::stop;
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}
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public static function notify(Actor $sender, Activity $activity, array $targets, ?string $reason = null): bool
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{
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$protocols = [];
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Event::handle('AddFreeNetworkProtocol', [&$protocols]);
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foreach ($protocols as $protocol) {
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$protocol::freeNetworkDistribute($sender, $activity, $targets, $reason);
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}
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return false;
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}
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public function onPluginVersion(array &$versions): bool
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{
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$versions[] = [
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'name' => 'WebFinger',
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'version' => self::PLUGIN_VERSION,
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'author' => 'Mikael Nordfeldth',
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'homepage' => GNUSOCIAL_ENGINE_URL,
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// TRANS: Plugin description.
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'rawdescription' => _m('WebFinger and LRDD support'),
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];
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return true;
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}
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}
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