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gnu-social-v2-archive-activ.../utils/postman.php
2018-08-01 17:38:39 +01:00

287 lines
9.8 KiB
PHP
Executable File

<?php
/**
* GNU social - a federating social network
*
* ActivityPubPlugin implementation for GNU Social
*
* LICENCE: 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/>.
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @author Daniel Supernault <danielsupernault@gmail.com>
* @copyright 2018 Free Software Foundation http://fsf.org
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link https://www.gnu.org/software/social/
*/
if (!defined('GNUSOCIAL')) {
exit(1);
}
use GuzzleHttp\Client;
use HttpSignatures\Context;
use HttpSignatures\GuzzleHttpSignatures;
/**
* 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 http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://www.gnu.org/software/social/
*/
class Activitypub_postman
{
private $actor;
private $actor_uri;
private $to = [];
private $client;
private $headers;
/**
* Create a postman to deliver something to someone
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Profile $from Profile of sender
* @param Array of Activitypub_profile $to destinataries
*/
public function __construct($from, $to = [])
{
$this->actor = $from;
$this->to = $to;
$this->actor_uri = ActivityPubPlugin::actor_uri($this->actor);
$actor_private_key = new Activitypub_rsa();
$actor_private_key = $actor_private_key->get_private_key($this->actor);
$context = new Context([
'keys' => [$this->actor_uri."#public-key" => $actor_private_key],
'algorithm' => 'rsa-sha256',
'headers' => ['(request-target)', 'date', 'content-type', 'accept', 'user-agent'],
]);
$this->to = $to;
$this->headers = [
'content-type' => 'application/activity+json',
'accept' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
'user-agent' => 'GNUSocialBot v0.1 - https://gnu.io/social',
'date' => date('D, d M Y h:i:s') . ' GMT'
];
$handlerStack = GuzzleHttpSignatures::defaultHandlerFromContext($context);
$this->client = new Client(['handler' => $handlerStack]);
}
/**
* Send something to remote instance
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $data request body
* @param string $inbox url of remote inbox
* @param string $method request method
* @return Psr\Http\Message\ResponseInterface
*/
public function send($data, $inbox, $method = 'POST')
{
common_debug('ActivityPub Postman: Delivering '.$data.' to '.$inbox);
$response = $this->client->request($method, $inbox, ['headers' => array_merge($this->headers, ['(request-target)' => strtolower($method).' '.parse_url($inbox, PHP_URL_PATH)]),'body' => $data]);
common_debug('ActivityPub Postman: Delivery result with status code '.$response->getStatusCode().': '.$response->getBody()->getContents());
return $response;
}
/**
* Send a follow notification to remote instance
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @throws Exception
*/
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()->getContents());
if ($res->getStatusCode() == 200 || $res->getStatusCode() == 202 || $res->getStatusCode() == 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
*
* @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()->getContents());
if ($res->getStatusCode() == 200 || $res->getStatusCode() == 202 || $res->getStatusCode() == 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
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Notice $notice
*/
public function like($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
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Notice $notice
*/
public function undo_like($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
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Notice $notice
*/
public function create($notice)
{
$data = Activitypub_create::create_to_array(
$notice->getUrl(),
$this->actor_uri,
Activitypub_notice::notice_to_array($notice)
);
if (isset($notice->reply_to)) {
$data["object"]["reply_to"] = $notice->getParent()->getUrl();
}
$data = json_encode($data, JSON_UNESCAPED_SLASHES);
foreach ($this->to_inbox() as $inbox) {
$this->send($data, $inbox);
}
}
/**
* Send a Announce notification to remote instances
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Notice $notice
*/
public function announce($notice)
{
$data = Activitypub_announce::announce_to_array(
ActivityPubPlugin::actor_uri($this->actor),
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 Delete notification to remote instances holding the notice
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Notice $notice
*/
public function delete($notice)
{
$data = Activitypub_delete::delete_to_array(Activitypub_notice::notice_to_array($notice));
$errors = [];
$data = json_encode($data, JSON_UNESCAPED_SLASHES);
foreach ($this->to_inbox() as $inbox) {
$res = $this->send($data, $inbox);
if (!$res->getStatusCode() == 200) {
$res_body = json_decode($res->getBody()->getContents());
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('apSharedInbox')]) {
continue;
}
$to_inboxes[] = $i;
}
return array_unique($to_inboxes);
}
}