471 lines
17 KiB
PHP
471 lines
17 KiB
PHP
<?php
|
|
|
|
declare(strict_types = 1);
|
|
|
|
// {{{ License
|
|
// This file is part of GNU social - https://www.gnu.org/software/social
|
|
//
|
|
// GNU social 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.
|
|
//
|
|
// GNU social 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 GNU social. If not, see <http://www.gnu.org/licenses/>.
|
|
// }}}
|
|
|
|
/**
|
|
* ActivityPub implementation for GNU social
|
|
*
|
|
* @package GNUsocial
|
|
* @category ActivityPub
|
|
*
|
|
* @author Diogo Peralta Cordeiro <@diogo.site>
|
|
* @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
|
|
namespace Plugin\ActivityPub;
|
|
|
|
use App\Core\DB\DB;
|
|
use App\Core\Event;
|
|
use App\Core\HTTPClient;
|
|
use App\Core\Log;
|
|
use App\Core\Modules\Plugin;
|
|
use App\Core\Router\RouteLoader;
|
|
use App\Core\Router\Router;
|
|
use App\Entity\Activity;
|
|
use App\Entity\Actor;
|
|
use App\Entity\LocalUser;
|
|
use App\Entity\Note;
|
|
use App\Util\Common;
|
|
use App\Util\Exception\NoSuchActorException;
|
|
use App\Util\Nickname;
|
|
use Component\FreeNetwork\Entity\FreeNetworkActorProtocol;
|
|
use Component\FreeNetwork\Util\Discovery;
|
|
use Exception;
|
|
use InvalidArgumentException;
|
|
use const PHP_URL_HOST;
|
|
use Plugin\ActivityPub\Controller\Inbox;
|
|
use Plugin\ActivityPub\Entity\ActivitypubActivity;
|
|
use Plugin\ActivityPub\Entity\ActivitypubActor;
|
|
use Plugin\ActivityPub\Entity\ActivitypubObject;
|
|
use Plugin\ActivityPub\Util\HTTPSignature;
|
|
use Plugin\ActivityPub\Util\Model;
|
|
use Plugin\ActivityPub\Util\Response\ActorResponse;
|
|
use Plugin\ActivityPub\Util\Response\NoteResponse;
|
|
use Plugin\ActivityPub\Util\TypeResponse;
|
|
use Plugin\ActivityPub\Util\Validator\contentLangModelValidator;
|
|
use Plugin\ActivityPub\Util\Validator\manuallyApprovesFollowersModelValidator;
|
|
use const PREG_SET_ORDER;
|
|
use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
|
|
use Symfony\Contracts\HttpClient\Exception\RedirectionExceptionInterface;
|
|
use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
|
|
use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
|
|
use Symfony\Contracts\HttpClient\ResponseInterface;
|
|
use XML_XRD;
|
|
use XML_XRD_Element_Link;
|
|
|
|
/**
|
|
* Adds ActivityPub support to GNU social when enabled
|
|
*
|
|
* @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
class ActivityPub extends Plugin
|
|
{
|
|
// ActivityStreams 2.0 Accept Headers
|
|
public static array $accept_headers = [
|
|
'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
|
|
'application/activity+json',
|
|
'application/json',
|
|
'application/ld+json',
|
|
];
|
|
|
|
// So that this isn't hardcoded everywhere
|
|
public const PUBLIC_TO = [
|
|
'https://www.w3.org/ns/activitystreams#Public',
|
|
'Public',
|
|
'as:Public',
|
|
];
|
|
public const HTTP_CLIENT_HEADERS = [
|
|
'Accept' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
|
|
'User-Agent' => 'GNUsocialBot ' . GNUSOCIAL_VERSION . ' - ' . GNUSOCIAL_PROJECT_URL,
|
|
];
|
|
|
|
public function version(): string
|
|
{
|
|
return '3.0.0';
|
|
}
|
|
|
|
/**
|
|
* This code executes when GNU social creates the page routing, and we hook
|
|
* on this event to add our Inbox and Outbox handler for ActivityPub.
|
|
*
|
|
* @param RouteLoader $r the router that was initialized
|
|
*/
|
|
public function onAddRoute(RouteLoader $r): bool
|
|
{
|
|
$r->connect(
|
|
'activitypub_inbox',
|
|
'/inbox.json',
|
|
[Inbox::class, 'handle'],
|
|
options: ['format' => self::$accept_headers[0]],
|
|
);
|
|
$r->connect(
|
|
'activitypub_actor_inbox',
|
|
'/actor/{gsactor_id<\d+>}/inbox.json',
|
|
[Inbox::class, 'handle'],
|
|
options: ['format' => self::$accept_headers[0]],
|
|
);
|
|
$r->connect(
|
|
'activitypub_actor_outbox',
|
|
'/actor/{gsactor_id<\d+>}/outbox.json',
|
|
[Inbox::class, 'handle'],
|
|
options: ['accept' => self::$accept_headers, 'format' => self::$accept_headers[0]],
|
|
);
|
|
return Event::next;
|
|
}
|
|
|
|
/**
|
|
* Fill Actor->getUrl() calls with correct URL coming from ActivityPub
|
|
*/
|
|
public function onStartGetActorUri(Actor $actor, int $type, ?string &$url): bool
|
|
{
|
|
if (
|
|
// Is remote?
|
|
!$actor->getIsLocal()
|
|
// Is in ActivityPub?
|
|
&& !\is_null($ap_actor = ActivitypubActor::getByPK(['actor_id' => $actor->getId()]))
|
|
// We can only provide a full URL (anything else wouldn't make sense)
|
|
&& $type === Router::ABSOLUTE_URL
|
|
) {
|
|
$url = $ap_actor->getUri();
|
|
return Event::stop;
|
|
}
|
|
|
|
return Event::next;
|
|
}
|
|
|
|
/**
|
|
* Overload core endpoints to make resources available in ActivityStreams 2.0
|
|
*
|
|
* @throws Exception
|
|
*/
|
|
public function onControllerResponseInFormat(string $route, array $accept_header, array $vars, ?TypeResponse &$response = null): bool
|
|
{
|
|
if (\count(array_intersect(self::$accept_headers, $accept_header)) === 0) {
|
|
return Event::next;
|
|
}
|
|
switch ($route) {
|
|
case 'actor_view_id':
|
|
case 'actor_view_nickname':
|
|
$response = ActorResponse::handle($vars['actor']);
|
|
return Event::stop;
|
|
case 'note_view':
|
|
$response = NoteResponse::handle($vars['note']);
|
|
return Event::stop;
|
|
default:
|
|
if (Event::handle('ActivityPubActivityStreamsTwoResponse', [$route, $vars, &$response]) === Event::stop) {
|
|
return Event::stop;
|
|
}
|
|
return Event::next;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add ActivityStreams 2 Extensions
|
|
*/
|
|
public function onActivityPubValidateActivityStreamsTwoData(string $type_name, array &$validators): bool
|
|
{
|
|
switch ($type_name) {
|
|
case 'Person':
|
|
$validators['manuallyApprovesFollowers'] = manuallyApprovesFollowersModelValidator::class;
|
|
break;
|
|
case 'Note':
|
|
$validators['contentLang'] = contentLangModelValidator::class;
|
|
break;
|
|
}
|
|
return Event::next;
|
|
}
|
|
|
|
// FreeNetworkComponent Events
|
|
|
|
/**
|
|
* Let FreeNetwork Component know we exist and which class to use to call the freeNetworkDistribute method
|
|
*/
|
|
public function onAddFreeNetworkProtocol(array &$protocols): bool
|
|
{
|
|
$protocols[] = '\Plugin\ActivityPub\ActivityPub';
|
|
return Event::next;
|
|
}
|
|
|
|
/**
|
|
* The FreeNetwork component will call this function to distribute this instance's activities
|
|
*
|
|
* @throws ClientExceptionInterface
|
|
* @throws RedirectionExceptionInterface
|
|
* @throws ServerExceptionInterface
|
|
* @throws TransportExceptionInterface
|
|
*/
|
|
public static function freeNetworkDistribute(Actor $sender, Activity $activity, array $targets, ?string $reason = null, array &$delivered = []): bool
|
|
{
|
|
$to_addr = [];
|
|
foreach ($targets as $actor) {
|
|
if (FreeNetworkActorProtocol::canIActor('activitypub', $actor->getId())) {
|
|
if (\is_null($ap_target = ActivitypubActor::getByPK(['actor_id' => $actor->getId()]))) {
|
|
continue;
|
|
}
|
|
$to_addr[$ap_target->getInboxSharedUri() ?? $ap_target->getInboxUri()][] = $actor;
|
|
} else {
|
|
return Event::next;
|
|
}
|
|
}
|
|
|
|
$errors = [];
|
|
//$to_failed = [];
|
|
foreach ($to_addr as $inbox => $dummy) {
|
|
try {
|
|
$res = self::postman($sender, Model::toJson($activity), $inbox);
|
|
|
|
// accumulate errors for later use, if needed
|
|
$status_code = $res->getStatusCode();
|
|
if (!($status_code === 200 || $status_code === 202 || $status_code === 409)) {
|
|
$res_body = json_decode($res->getContent(), true);
|
|
$errors[] = $res_body['error'] ?? 'An unknown error occurred.';
|
|
//$to_failed[$inbox] = $activity;
|
|
} else {
|
|
array_push($delivered, ...$dummy);
|
|
foreach ($dummy as $actor) {
|
|
FreeNetworkActorProtocol::protocolSucceeded(
|
|
'activitypub',
|
|
$actor,
|
|
Discovery::normalize($actor->getNickname() . '@' . parse_url($inbox, PHP_URL_HOST)),
|
|
);
|
|
}
|
|
}
|
|
} catch (Exception $e) {
|
|
Log::error('ActivityPub @ freeNetworkDistribute: ' . $e->getMessage());
|
|
//$to_failed[$inbox] = $activity;
|
|
}
|
|
}
|
|
|
|
if (!empty($errors)) {
|
|
Log::error(sizeof($errors) . ' instance/s failed to handle the delete_profile activity!');
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Internal tool to sign and send activities out
|
|
*
|
|
* @throws Exception
|
|
*/
|
|
private static function postman(Actor $sender, string $json_activity, string $inbox, string $method = 'post'): ResponseInterface
|
|
{
|
|
Log::debug('ActivityPub Postman: Delivering ' . $json_activity . ' to ' . $inbox);
|
|
|
|
$headers = HTTPSignature::sign($sender, $inbox, $json_activity);
|
|
Log::debug('ActivityPub Postman: Delivery headers were: ' . print_r($headers, true));
|
|
|
|
$response = HTTPClient::$method($inbox, ['headers' => $headers, 'body' => $json_activity]);
|
|
Log::debug('ActivityPub Postman: Delivery result with status code ' . $response->getStatusCode() . ': ' . $response->getContent());
|
|
return $response;
|
|
}
|
|
|
|
// WebFinger Events
|
|
|
|
/**
|
|
* Add activity+json mimetype to WebFinger
|
|
*/
|
|
public function onEndWebFingerProfileLinks(XML_XRD $xrd, Actor $object): bool
|
|
{
|
|
if ($object->isPerson()) {
|
|
$link = new XML_XRD_Element_Link(
|
|
rel: 'self',
|
|
href: $object->getUri(Router::ABSOLUTE_URL),//Router::url('actor_view_id', ['id' => $object->getId()], Router::ABSOLUTE_URL),
|
|
type: 'application/activity+json',
|
|
);
|
|
$xrd->links[] = clone $link;
|
|
}
|
|
return Event::next;
|
|
}
|
|
|
|
/**
|
|
* When FreeNetwork component asks us to help with identifying Actors from XRDs
|
|
*/
|
|
public function onFreeNetworkFoundXrd(XML_XRD $xrd, ?Actor &$actor = null): bool
|
|
{
|
|
$addr = null;
|
|
foreach ($xrd->aliases as $alias) {
|
|
if (Discovery::isAcct($alias)) {
|
|
$addr = Discovery::normalize($alias);
|
|
}
|
|
}
|
|
if (\is_null($addr)) {
|
|
return Event::next;
|
|
} else {
|
|
if (!FreeNetworkActorProtocol::canIAddr('activitypub', $addr)) {
|
|
return Event::next;
|
|
}
|
|
}
|
|
try {
|
|
$ap_actor = ActivitypubActor::fromXrd($addr, $xrd);
|
|
$actor = Actor::getById($ap_actor->getActorId());
|
|
FreeNetworkActorProtocol::protocolSucceeded('activitypub', $actor, $addr);
|
|
return Event::stop;
|
|
} catch (Exception $e) {
|
|
Log::error('ActivityPub Actor from URL Mention check failed: ' . $e->getMessage());
|
|
return Event::next;
|
|
}
|
|
}
|
|
|
|
// Discovery Events
|
|
|
|
/**
|
|
* When FreeNetwork component asks us to help with identifying Actors from URIs
|
|
*/
|
|
public function onFreeNetworkFindMentions(string $target, ?Actor &$actor = null): bool
|
|
{
|
|
try {
|
|
if (FreeNetworkActorProtocol::canIAddr('activitypub', $addr = Discovery::normalize($target))) {
|
|
$ap_actor = ActivitypubActor::getByAddr($addr);
|
|
$actor = Actor::getById($ap_actor->getActorId());
|
|
FreeNetworkActorProtocol::protocolSucceeded('activitypub', $actor->getId(), $addr);
|
|
return Event::stop;
|
|
} else {
|
|
return Event::next;
|
|
}
|
|
} catch (Exception $e) {
|
|
Log::error('ActivityPub Webfinger Mention check failed: ' . $e->getMessage());
|
|
return Event::next;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return string got from URI
|
|
*/
|
|
public static function getUriByObject(mixed $object): string
|
|
{
|
|
if ($object instanceof Note) {
|
|
if ($object->getIsLocal()) {
|
|
return $object->getUrl();
|
|
} else {
|
|
// Try known remote objects
|
|
$known_object = ActivitypubObject::getByPK(['object_type' => 'note', 'object_id' => $object->getId()]);
|
|
if ($known_object instanceof ActivitypubObject) {
|
|
return $known_object->getObjectUri();
|
|
}
|
|
}
|
|
} elseif ($object instanceof Activity) {
|
|
// Try known remote activities
|
|
$known_activity = ActivitypubActivity::getByPK(['activity_id' => $object->getId()]);
|
|
if ($known_activity instanceof ActivitypubActivity) {
|
|
return $known_activity->getActivityUri();
|
|
} else {
|
|
return Router::url('activity_view', ['id' => $object->getId()], Router::ABSOLUTE_URL);
|
|
}
|
|
}
|
|
throw new InvalidArgumentException('ActivityPub::getUriByObject found a limitation with: ' . var_export($object, true));
|
|
}
|
|
|
|
/**
|
|
* Get a Note from ActivityPub URI, if it doesn't exist, attempt to fetch it
|
|
* This should only be necessary internally.
|
|
*
|
|
* @throws ClientExceptionInterface
|
|
* @throws RedirectionExceptionInterface
|
|
* @throws ServerExceptionInterface
|
|
* @throws TransportExceptionInterface
|
|
*
|
|
* @return null|mixed|Note got from URI
|
|
*/
|
|
public static function getObjectByUri(string $resource, bool $try_online = true)
|
|
{
|
|
// Try known objects
|
|
$known_object = ActivitypubObject::getByPK(['object_uri' => $resource]);
|
|
if ($known_object instanceof ActivitypubObject) {
|
|
return $known_object->getObject();
|
|
}
|
|
|
|
// Try known activities
|
|
$known_activity = ActivitypubActivity::getByPK(['activity_uri' => $resource]);
|
|
if ($known_activity instanceof ActivitypubActivity) {
|
|
return $known_activity->getActivity();
|
|
}
|
|
|
|
// Try local Notes (pretty incomplete effort, I know)
|
|
if (Common::isValidHttpUrl($resource)) {
|
|
// This means $resource is a valid url
|
|
$resource_parts = parse_url($resource);
|
|
// TODO: Use URLMatcher
|
|
if ($resource_parts['host'] === $_ENV['SOCIAL_DOMAIN']) { // XXX: Common::config('site', 'server')) {
|
|
$local_note = DB::findOneBy('note', ['url' => $resource]);
|
|
if ($local_note instanceof Note) {
|
|
return $local_note;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Try remote
|
|
if (!$try_online) {
|
|
return;
|
|
}
|
|
|
|
$response = HTTPClient::get($resource, ['headers' => self::HTTP_CLIENT_HEADERS]);
|
|
// If it was deleted
|
|
if ($response->getStatusCode() == 410) {
|
|
//$obj = Type::create('Tombstone', ['id' => $resource]);
|
|
return;
|
|
} elseif (!HTTPClient::statusCodeIsOkay($response)) { // If it is unavailable
|
|
throw new Exception('Non Ok Status Code for given Object id.');
|
|
} else {
|
|
return Model::jsonToType($response->getContent());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get an Actor from ActivityPub URI, if it doesn't exist, attempt to fetch it
|
|
* This should only be necessary internally.
|
|
*
|
|
* @throws NoSuchActorException
|
|
*
|
|
* @return Actor got from URI
|
|
*/
|
|
public static function getActorByUri(string $resource): Actor
|
|
{
|
|
// Try local
|
|
if (Common::isValidHttpUrl($resource)) {
|
|
// This means $resource is a valid url
|
|
$resource_parts = parse_url($resource);
|
|
// TODO: Use URLMatcher
|
|
if ($resource_parts['host'] === $_ENV['SOCIAL_DOMAIN']) { // XXX: Common::config('site', 'server')) {
|
|
$str = $resource_parts['path'];
|
|
// actor_view_nickname
|
|
$renick = '/\/@(' . Nickname::DISPLAY_FMT . ')\/?/m';
|
|
// actor_view_id
|
|
$reuri = '/\/actor\/(\d+)\/?/m';
|
|
if (preg_match_all($renick, $str, $matches, PREG_SET_ORDER, 0) === 1) {
|
|
return LocalUser::getByPK(['nickname' => $matches[0][1]])->getActor();
|
|
} elseif (preg_match_all($reuri, $str, $matches, PREG_SET_ORDER, 0) === 1) {
|
|
return Actor::getById((int) $matches[0][1]);
|
|
}
|
|
}
|
|
}
|
|
// Try remote
|
|
$aprofile = ActivitypubActor::getByAddr($resource);
|
|
if ($aprofile instanceof ActivitypubActor) {
|
|
return Actor::getById($aprofile->getActorId());
|
|
} else {
|
|
throw new NoSuchActorException("From URI: {$resource}");
|
|
}
|
|
}
|
|
}
|