Diogo Peralta Cordeiro
778cb57d83
Instructions below
To extend an Activity properties do:
public function onActivityPubValidateActivityStreamsTwoData(string $type_name, array &$validators): bool {
if ($type_name === '{Type}') {
$validators['attribute'] = myValidator::class;
}
return Event::next;
}
The Validator should be of the form:
use ActivityPhp\Type;
use ActivityPhp\Type\Util;
use Plugin\ActivityPub\Util\ModelValidator;
class myValidator extends ModelValidator
{
/**
* Validate Attribute's value
*
* @param mixed $value from JSON's attribute
* @param mixed $container A {Type}
* @return bool
* @throws Exception
*/
public function validate($value, $container): bool
{
// Validate that container is a {Type}
Util::subclassOf($container, Type\Extended\Object\{Type}::class, true);
return {Validation Result};
To act on received activities do:
public function onActivityPubNew{Type}(&$obj): bool {
To add information to Activities being federated by ActivityPub do:
public function ActivityPubAddActivityStreamsTwoData(string $type_name, &$type): bool {
To implement an ActivityStreams 2.0 representation do:
public function onActivityPubActivityStreamsTwoResponse(string $route, arrray $vars, ?TypeResponse &$response = null): bool {
if ($route === '{Object route}') {
$response = ModelResponse::handle($vars[{Object}]);
return Event::stop;
}
return Event::next;
}
420 lines
15 KiB
PHP
420 lines
15 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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/**
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* ActivityPub implementation for GNU social
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*
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* @package GNUsocial
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* @category ActivityPub
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* @author Diogo Peralta Cordeiro <@diogo.site>
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* @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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namespace Plugin\ActivityPub;
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use App\Core\Event;
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use App\Core\HTTPClient;
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use App\Core\Log;
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use App\Core\Modules\Plugin;
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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\Activity;
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use App\Entity\Actor;
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use App\Entity\LocalUser;
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use App\Util\Common;
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use App\Util\Exception\NoSuchActorException;
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use App\Util\Nickname;
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use Component\FreeNetwork\Entity\FreeNetworkActorProtocol;
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use Component\FreeNetwork\Util\Discovery;
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use Exception;
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use Plugin\ActivityPub\Controller\Inbox;
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use Plugin\ActivityPub\Entity\ActivitypubActor;
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use Plugin\ActivityPub\Util\HTTPSignature;
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use Plugin\ActivityPub\Util\Model;
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use Plugin\ActivityPub\Util\Response\ActorResponse;
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use Plugin\ActivityPub\Util\Response\NoteResponse;
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use Plugin\ActivityPub\Util\TypeResponse;
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use Plugin\ActivityPub\Util\Validator\contentLangModelValidator;
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use Plugin\ActivityPub\Util\Validator\manuallyApprovesFollowersModelValidator;
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use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\RedirectionExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
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use Symfony\Contracts\HttpClient\ResponseInterface;
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use XML_XRD;
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use XML_XRD_Element_Link;
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use function count;
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use function is_null;
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use const PHP_URL_HOST;
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use const PREG_SET_ORDER;
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/**
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* Adds ActivityPub support to GNU social when enabled
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*
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* @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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class ActivityPub extends Plugin
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{
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// ActivityStreams 2.0 Accept Headers
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public static array $accept_headers = [
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'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
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'application/activity+json',
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'application/json',
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'application/ld+json',
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];
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// So that this isn't hardcoded everywhere
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public const PUBLIC_TO = [
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'https://www.w3.org/ns/activitystreams#Public',
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'Public',
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'as:Public',
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];
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public const HTTP_CLIENT_HEADERS = [
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'Accept' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
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'User-Agent' => 'GNUsocialBot ' . GNUSOCIAL_VERSION . ' - ' . GNUSOCIAL_PROJECT_URL,
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];
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public function version(): string
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{
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return '3.0.0';
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}
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/**
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* This code executes when GNU social creates the page routing, and we hook
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* on this event to add our Inbox and Outbox handler for ActivityPub.
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*
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* @param RouteLoader $r the router that was initialized
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*/
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public function onAddRoute(RouteLoader $r): bool
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{
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$r->connect(
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'activitypub_inbox',
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'/inbox.json',
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[Inbox::class, 'handle'],
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options: ['accept' => self::$accept_headers, 'format' => self::$accept_headers[0]],
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);
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$r->connect(
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'activitypub_actor_inbox',
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'/actor/{gsactor_id<\d+>}/inbox.json',
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[Inbox::class, 'handle'],
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options: ['accept' => self::$accept_headers, 'format' => self::$accept_headers[0]],
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);
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$r->connect(
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'activitypub_actor_outbox',
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'/actor/{gsactor_id<\d+>}/outbox.json',
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[Inbox::class, 'handle'],
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options: ['accept' => self::$accept_headers, 'format' => self::$accept_headers[0]],
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);
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return Event::next;
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}
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/**
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* Fill Actor->getUrl() calls with correct URL coming from ActivityPub
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*
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* @param Actor $actor
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* @param int $type
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* @param string|null $url
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* @return bool
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*/
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public function onStartGetActorUrl(Actor $actor, int $type, ?string &$url): bool
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{
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if (
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// Is remote?
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!$actor->getIsLocal()
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// Is in ActivityPub?
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&& !is_null($ap_actor = ActivitypubActor::getWithPK(['actor_id' => $actor->getId()]))
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// We can only provide a full URL (anything else wouldn't make sense)
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&& $type === Router::ABSOLUTE_URL
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) {
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$url = $ap_actor->getUri();
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return Event::stop;
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}
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return Event::next;
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}
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/**
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* Overload core endpoints to make resources available in ActivityStreams 2.0
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*
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* @throws Exception
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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 (count(array_intersect(self::$accept_headers, $accept_header)) === 0) {
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return Event::next;
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}
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switch ($route) {
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case 'actor_view_id':
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case 'actor_view_nickname':
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$response = ActorResponse::handle($vars['actor']);
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return Event::stop;
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case 'note_view':
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$response = NoteResponse::handle($vars['note']);
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return Event::stop;
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default:
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if (Event::handle('ActivityPubActivityStreamsTwoResponse', [$route, $vars, &$response]) === Event::stop) {
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return Event::stop;
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}
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return Event::next;
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}
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}
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/**
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* Add ActivityStreams 2 Extensions
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*
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* @param string $type_name
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* @param array $validators
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* @return bool
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*/
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public function onActivityPubValidateActivityStreamsTwoData(string $type_name, array &$validators): bool
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{
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switch ($type_name) {
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case 'Person':
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$validators['manuallyApprovesFollowers'] = manuallyApprovesFollowersModelValidator::class;
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break;
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case 'Note':
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$validators['contentLang'] = contentLangModelValidator::class;
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break;
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}
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return Event::next;
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}
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// FreeNetworkComponent Events
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/**
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* Let FreeNetwork Component know we exist and which class to use to call the freeNetworkDistribute method
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*
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* @param array $protocols
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* @return bool
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*/
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public function onAddFreeNetworkProtocol(array &$protocols): bool
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{
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$protocols[] = '\Plugin\ActivityPub\ActivityPub';
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return Event::next;
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}
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/**
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* The FreeNetwork component will call this function to distribute this instance's activities
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*
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* @param Actor $sender
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* @param Activity $activity
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* @param array $targets
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* @param string|null $reason
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* @param array $delivered
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* @return bool
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* @throws ClientExceptionInterface
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* @throws RedirectionExceptionInterface
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* @throws ServerExceptionInterface
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* @throws TransportExceptionInterface
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*/
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public static function freeNetworkDistribute(Actor $sender, Activity $activity, array $targets, ?string $reason = null, array &$delivered = []): bool
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{
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$to_addr = [];
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foreach ($targets as $actor) {
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if (FreeNetworkActorProtocol::canIActor('activitypub', $actor->getId())) {
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if (is_null($ap_target = ActivitypubActor::getWithPK(['actor_id' => $actor->getId()]))) {
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continue;
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}
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$to_addr[$ap_target->getInboxSharedUri() ?? $ap_target->getInboxUri()][] = $actor;
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} else {
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return Event::next;
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}
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}
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$errors = [];
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//$to_failed = [];
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foreach ($to_addr as $inbox => $dummy) {
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try {
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$res = self::postman($sender, Model::toJson($activity), $inbox);
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// accumulate errors for later use, if needed
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$status_code = $res->getStatusCode();
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if (!($status_code === 200 || $status_code === 202 || $status_code === 409)) {
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$res_body = json_decode($res->getContent(), true);
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$errors[] = $res_body['error'] ?? 'An unknown error occurred.';
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//$to_failed[$inbox] = $activity;
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} else {
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array_push($delivered, ...$dummy);
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foreach ($dummy as $actor) {
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FreeNetworkActorProtocol::protocolSucceeded(
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'activitypub',
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$actor,
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Discovery::normalize($actor->getNickname() . '@' . parse_url($inbox, PHP_URL_HOST)),
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);
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}
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}
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} catch (Exception $e) {
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Log::error('ActivityPub @ freeNetworkDistribute: ' . $e->getMessage());
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//$to_failed[$inbox] = $activity;
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}
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}
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if (!empty($errors)) {
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Log::error(sizeof($errors) . ' instance/s failed to handle the delete_profile activity!');
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return false;
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}
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return true;
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}
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/**
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* Internal tool to sign and send activities out
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*
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* @param Actor $sender
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* @param string $json_activity
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* @param string $inbox
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* @param string $method
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* @return ResponseInterface
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* @throws Exception
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*/
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private static function postman(Actor $sender, string $json_activity, string $inbox, string $method = 'post'): ResponseInterface
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{
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Log::debug('ActivityPub Postman: Delivering ' . $json_activity . ' to ' . $inbox);
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$headers = HTTPSignature::sign($sender, $inbox, $json_activity);
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Log::debug('ActivityPub Postman: Delivery headers were: ' . print_r($headers, true));
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$response = HTTPClient::$method($inbox, ['headers' => $headers, 'body' => $json_activity]);
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Log::debug('ActivityPub Postman: Delivery result with status code ' . $response->getStatusCode() . ': ' . $response->getContent());
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return $response;
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}
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// WebFinger Events
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/**
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* Add activity+json mimetype to WebFinger
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*
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* @param XML_XRD $xrd
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* @param Actor $object
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* @return bool
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*/
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public function onEndWebFingerProfileLinks(XML_XRD $xrd, Actor $object): bool
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{
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if ($object->isPerson()) {
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$link = new XML_XRD_Element_Link(
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rel: 'self',
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href: $object->getUri(Router::ABSOLUTE_URL),//Router::url('actor_view_id', ['id' => $object->getId()], Router::ABSOLUTE_URL),
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type: 'application/activity+json',
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);
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$xrd->links[] = clone $link;
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}
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return Event::next;
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}
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/**
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* When FreeNetwork component asks us to help with identifying Actors from XRDs
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*
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* @param XML_XRD $xrd
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* @param Actor|null $actor
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* @return bool
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*/
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public function onFreeNetworkFoundXrd(XML_XRD $xrd, ?Actor &$actor = null): bool
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{
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$addr = null;
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foreach ($xrd->aliases as $alias) {
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if (Discovery::isAcct($alias)) {
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$addr = Discovery::normalize($alias);
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}
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}
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if (is_null($addr)) {
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return Event::next;
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} else {
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if (!FreeNetworkActorProtocol::canIAddr('activitypub', $addr)) {
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return Event::next;
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}
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}
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try {
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$ap_actor = ActivitypubActor::fromXrd($addr, $xrd);
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$actor = Actor::getById($ap_actor->getActorId());
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FreeNetworkActorProtocol::protocolSucceeded('activitypub', $actor, $addr);
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return Event::stop;
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} catch (Exception $e) {
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Log::error('ActivityPub Actor from URL Mention check failed: ' . $e->getMessage());
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return Event::next;
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}
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}
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// Discovery Events
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/**
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* When FreeNetwork component asks us to help with identifying Actors from URIs
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*
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* @param string $target
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* @param Actor|null $actor
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* @return bool
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*/
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public function onFreeNetworkFindMentions(string $target, ?Actor &$actor = null): bool
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{
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try {
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if (FreeNetworkActorProtocol::canIAddr('activitypub', $addr = Discovery::normalize($target))) {
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$ap_actor = ActivitypubActor::getByAddr($addr);
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$actor = Actor::getById($ap_actor->getActorId());
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FreeNetworkActorProtocol::protocolSucceeded('activitypub', $actor->getId(), $addr);
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return Event::stop;
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} else {
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return Event::next;
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}
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} catch (Exception $e) {
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Log::error('ActivityPub Webfinger Mention check failed: ' . $e->getMessage());
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return Event::next;
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}
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}
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/**
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* Get an Actor from ActivityPub URI, if it doesn't exist, attempt to fetch it
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* This should only be necessary internally.
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*
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* @param string $resource
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* @return Actor got from URI
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* @throws NoSuchActorException
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*/
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public static function getActorByUri(string $resource): Actor
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{
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// Try local
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if (Common::isValidHttpUrl($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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return LocalUser::getWithPK(['nickname' => $matches[0][1]])->getActor();
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} elseif (preg_match_all($reuri, $str, $matches, PREG_SET_ORDER, 0) === 1) {
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return Actor::getById((int)$matches[0][1]);
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}
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}
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}
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// Try remote
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$aprofile = ActivitypubActor::getByAddr($resource);
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if ($aprofile instanceof ActivitypubActor) {
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return Actor::getById($aprofile->getActorId());
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} else {
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throw new NoSuchActorException("From URI: {$resource}");
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}
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}
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}
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