gnu-social/plugins/ActivityPub/lib/postman.php
Diogo Cordeiro 2f1ddd8280 [CORE] Add ActivityPub plugin
This is not the same as the one in https://notabug.org/diogo/gnu-social-activitypub-plugin
Differences to the first "release"
-> Doesn't use guzzle nor has any composer dependencies
-> Supports HTTP Signatures
-> Has basic l10n/i18n
-> Some minor bug fixes
2021-07-16 19:44:33 +01:00

349 lines
11 KiB
PHP

<?php
// 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
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub's own Postman
*
* Standard workflow expects that we send an Explorer to find out destinataries'
* inbox address. Then we send our postman to deliver whatever we want to send them.
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_postman
{
private $actor;
private $actor_uri;
private $to = [];
private $client;
private $headers;
/**
* Create a postman to deliver something to someone
*
* @param Profile $from Profile of sender
* @param $to
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function __construct($from, $to)
{
$this->actor = $from;
$discovery = new Activitypub_explorer();
$this->to = $to;
$followers = apActorFollowersAction::generate_followers($this->actor, 0, null);
foreach ($followers as $sub) {
try {
$to[]= Activitypub_profile::from_profile($discovery->lookup($sub)[0]);
} catch (Exception $e) {
// Not an ActivityPub Remote Follower, let it go
}
}
unset($discovery);
$this->actor_uri = ActivityPubPlugin::actor_uri($this->actor);
$this->client = new HTTPClient();
}
/**
* Send something to remote instance
*
* @param string $data request body
* @param string $inbox url of remote inbox
* @param string $method request method
* @return GNUsocial_HTTPResponse
* @throws HTTP_Request2_Exception
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function send($data, $inbox, $method = 'POST')
{
common_debug('ActivityPub Postman: Delivering '.$data.' to '.$inbox);
$headers = HttpSignature::sign($this->actor, $inbox, $data);
common_debug('ActivityPub Postman: Delivery headers were: '.print_r($headers, true));
$this->client->setBody($data);
switch ($method) {
case 'POST':
$response = $this->client->post($inbox, $headers);
break;
case 'GET':
$response = $this->client->get($inbox, $headers);
break;
default:
throw new Exception("Unsupported request method for postman.");
}
common_debug('ActivityPub Postman: Delivery result with status code '.$response->getStatus().': '.$response->getBody());
return $response;
}
/**
* Send a follow notification to remote instance
*
* @return bool
* @throws HTTP_Request2_Exception
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function follow()
{
$data = Activitypub_follow::follow_to_array(ActivityPubPlugin::actor_uri($this->actor), $this->to[0]->getUrl());
$res = $this->send(json_encode($data, JSON_UNESCAPED_SLASHES), $this->to[0]->get_inbox());
$res_body = json_decode($res->getBody());
if ($res->getStatus() == 200 || $res->getStatus() == 202 || $res->getStatus() == 409) {
$pending_list = new Activitypub_pending_follow_requests($this->actor->getID(), $this->to[0]->getID());
$pending_list->add();
return true;
} elseif (isset($res_body[0]->error)) {
throw new Exception($res_body[0]->error);
}
throw new Exception("An unknown error occurred.");
}
/**
* Send a Undo Follow notification to remote instance
*
* @return bool
* @throws HTTP_Request2_Exception
* @throws Exception
* @throws Exception
* @throws Exception
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function undo_follow()
{
$data = Activitypub_undo::undo_to_array(
Activitypub_follow::follow_to_array(
ActivityPubPlugin::actor_uri($this->actor),
$this->to[0]->getUrl()
)
);
$res = $this->send(json_encode($data, JSON_UNESCAPED_SLASHES), $this->to[0]->get_inbox());
$res_body = json_decode($res->getBody());
if ($res->getStatus() == 200 || $res->getStatus() == 202 || $res->getStatus() == 409) {
$pending_list = new Activitypub_pending_follow_requests($this->actor->getID(), $this->to[0]->getID());
$pending_list->remove();
return true;
}
if (isset($res_body[0]->error)) {
throw new Exception($res_body[0]->error);
}
throw new Exception("An unknown error occurred.");
}
/**
* Send a Accept Follow notification to remote instance
*
* @return bool
* @throws HTTP_Request2_Exception
* @throws Exception
* @throws Exception
* @throws Exception
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function accept_follow()
{
$data = Activitypub_accept::accept_to_array(
Activitypub_follow::follow_to_array(
$this->to[0]->getUrl(),
ActivityPubPlugin::actor_uri($this->actor)
)
);
$res = $this->send(json_encode($data, JSON_UNESCAPED_SLASHES), $this->to[0]->get_inbox());
$res_body = json_decode($res->getBody());
if ($res->getStatus() == 200 || $res->getStatus() == 202 || $res->getStatus() == 409) {
$pending_list = new Activitypub_pending_follow_requests($this->actor->getID(), $this->to[0]->getID());
$pending_list->remove();
return true;
}
if (isset($res_body[0]->error)) {
throw new Exception($res_body[0]->error);
}
throw new Exception("An unknown error occurred.");
}
/**
* Send a Like notification to remote instances holding the notice
*
* @param Notice $notice
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function like($notice)
{
$data = Activitypub_like::like_to_array(
ActivityPubPlugin::actor_uri($this->actor),
$notice->getUrl()
);
$data = json_encode($data, JSON_UNESCAPED_SLASHES);
foreach ($this->to_inbox() as $inbox) {
$this->send($data, $inbox);
}
}
/**
* Send a Undo Like notification to remote instances holding the notice
*
* @param Notice $notice
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function undo_like($notice)
{
$data = Activitypub_undo::undo_to_array(
Activitypub_like::like_to_array(
ActivityPubPlugin::actor_uri($this->actor),
$notice->getUrl()
)
);
$data = json_encode($data, JSON_UNESCAPED_SLASHES);
foreach ($this->to_inbox() as $inbox) {
$this->send($data, $inbox);
}
}
/**
* Send a Create notification to remote instances
*
* @param Notice $notice
* @throws EmptyPkeyValueException
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @throws ServerException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function create_note($notice)
{
$data = Activitypub_create::create_to_array(
$this->actor_uri,
Activitypub_notice::notice_to_array($notice)
);
$data = json_encode($data, JSON_UNESCAPED_SLASHES);
foreach ($this->to_inbox() as $inbox) {
$this->send($data, $inbox);
}
}
/**
* Send a Announce notification to remote instances
*
* @param Notice $notice
* @throws HTTP_Request2_Exception
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function announce($notice)
{
$data = Activitypub_announce::announce_to_array(
ActivityPubPlugin::actor_uri($this->actor),
$notice->getUri()
);
$data = json_encode($data, JSON_UNESCAPED_SLASHES);
foreach ($this->to_inbox() as $inbox) {
$this->send($data, $inbox);
}
}
/**
* Send a Delete notification to remote instances holding the notice
*
* @param Notice $notice
* @throws HTTP_Request2_Exception
* @throws InvalidUrlException
* @throws Exception
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function delete($notice)
{
$data = Activitypub_delete::delete_to_array(
ActivityPubPlugin::actor_uri($notice->getProfile()),
$notice->getUrl()
);
$errors = [];
$data = json_encode($data, JSON_UNESCAPED_SLASHES);
foreach ($this->to_inbox() as $inbox) {
$res = $this->send($data, $inbox);
if (!$res->getStatus() == 200) {
$res_body = json_decode($res->getBody(), true);
if (isset($res_body[0]['error'])) {
$errors[] = ($res_body[0]['error']);
continue;
}
$errors[] = ("An unknown error occurred.");
}
}
if (!empty($errors)) {
throw new Exception(json_encode($errors));
}
}
/**
* Clean list of inboxes to deliver messages
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return array To Inbox URLs
*/
private function to_inbox()
{
$to_inboxes = [];
foreach ($this->to as $to_profile) {
$i = $to_profile->get_inbox();
// Prevent delivering to self
if ($i == [common_local_url('apInbox')]) {
continue;
}
$to_inboxes[] = $i;
}
return array_unique($to_inboxes);
}
}