<?php
/**
- * @file src/Protocol/ActivityPub.php
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ *
*/
+
namespace Friendica\Protocol;
+use Friendica\Util\JsonLD;
use Friendica\Util\Network;
use Friendica\Core\Protocol;
use Friendica\Model\APContact;
+use Friendica\Model\User;
+use Friendica\Util\HTTPSignature;
/**
- * @brief ActivityPub Protocol class
+ * ActivityPub Protocol class
+ *
* The ActivityPub Protocol is a message exchange protocol defined by the W3C.
* https://www.w3.org/TR/activitypub/
* https://www.w3.org/TR/activitystreams-core/
*
* To-do:
* - Polling the outboxes for missing content?
+ *
+ * Missing parts from DFRN:
+ * - Public Forum
+ * - Private Forum
+ * - Relocation
*/
class ActivityPub
{
const PUBLIC_COLLECTION = 'https://www.w3.org/ns/activitystreams#Public';
const CONTEXT = ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1',
['vcard' => 'http://www.w3.org/2006/vcard/ns#',
+ 'dfrn' => 'http://purl.org/macgirvin/dfrn/1.0/',
'diaspora' => 'https://diasporafoundation.org/ns/',
+ 'litepub' => 'http://litepub.social/ns#',
'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers',
- 'sensitive' => 'as:sensitive', 'Hashtag' => 'as:Hashtag']];
+ 'sensitive' => 'as:sensitive', 'Hashtag' => 'as:Hashtag',
+ 'directMessage' => 'litepub:directMessage']];
const ACCOUNT_TYPES = ['Person', 'Organization', 'Service', 'Group', 'Application'];
/**
* Checks if the web request is done for the AP protocol
*
- * @return is it AP?
+ * @return bool is it AP?
*/
public static function isRequest()
{
- return stristr(defaults($_SERVER, 'HTTP_ACCEPT', ''), 'application/activity+json') ||
- stristr(defaults($_SERVER, 'HTTP_ACCEPT', ''), 'application/ld+json');
+ return stristr($_SERVER['HTTP_ACCEPT'] ?? '', 'application/activity+json') ||
+ stristr($_SERVER['HTTP_ACCEPT'] ?? '', 'application/ld+json');
}
/**
* Fetches ActivityPub content from the given url
*
- * @param string $url content url
+ * @param string $url content url
+ * @param integer $uid User ID for the signature
* @return array
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
- public static function fetchContent($url)
+ public static function fetchContent($url, $uid = 0)
{
- $curlResult = Network::curl($url, false, $redirects, ['accept_content' => 'application/activity+json, application/ld+json']);
+ if (!empty($uid)) {
+ return HTTPSignature::fetch($url, $uid);
+ }
+
+ $curlResult = Network::curl($url, false, ['accept_content' => 'application/activity+json, application/ld+json']);
if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
return false;
}
return $content;
}
+ private static function getAccountType($apcontact)
+ {
+ $accounttype = -1;
+
+ switch($apcontact['type']) {
+ case 'Person':
+ $accounttype = User::ACCOUNT_TYPE_PERSON;
+ break;
+ case 'Organization':
+ $accounttype = User::ACCOUNT_TYPE_ORGANISATION;
+ break;
+ case 'Service':
+ $accounttype = User::ACCOUNT_TYPE_NEWS;
+ break;
+ case 'Group':
+ $accounttype = User::ACCOUNT_TYPE_COMMUNITY;
+ break;
+ case 'Application':
+ $accounttype = User::ACCOUNT_TYPE_RELAY;
+ break;
+ }
+
+ return $accounttype;
+ }
+
/**
* Fetches a profile from the given url into an array that is compatible to Probe::uri
*
- * @param string $url profile url
+ * @param string $url profile url
+ * @param boolean $update Update the profile
* @return array
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ * @throws \ImagickException
*/
- public static function probeProfile($url)
+ public static function probeProfile($url, $update = true)
{
- $apcontact = APContact::getByURL($url, true);
+ $apcontact = APContact::getByURL($url, $update);
if (empty($apcontact)) {
return false;
}
$profile['url'] = $apcontact['url'];
$profile['addr'] = $apcontact['addr'];
$profile['alias'] = $apcontact['alias'];
+ $profile['following'] = $apcontact['following'];
+ $profile['followers'] = $apcontact['followers'];
+ $profile['inbox'] = $apcontact['inbox'];
+ $profile['outbox'] = $apcontact['outbox'];
+ $profile['sharedinbox'] = $apcontact['sharedinbox'];
$profile['photo'] = $apcontact['photo'];
- // $profile['community']
+ $profile['account-type'] = self::getAccountType($apcontact);
+ $profile['community'] = ($profile['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
// $profile['keywords']
// $profile['location']
$profile['about'] = $apcontact['about'];
$profile['poll'] = $apcontact['outbox'];
$profile['pubkey'] = $apcontact['pubkey'];
$profile['baseurl'] = $apcontact['baseurl'];
+ $profile['gsid'] = $apcontact['gsid'];
// Remove all "null" fields
foreach ($profile as $field => $content) {
/**
* Fetches activities from the outbox of a given profile and processes it
*
- * @param string $url
+ * @param string $url
* @param integer $uid User ID
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function fetchOutbox($url, $uid)
{
- $data = self::fetchContent($url);
+ $data = self::fetchContent($url, $uid);
if (empty($data)) {
return;
}
ActivityPub\Receiver::processActivity($ldactivity, '', $uid, true);
}
}
+
+ /**
+ * Fetch items from AP endpoints
+ *
+ * @param string $url Address of the endpoint
+ * @param integer $uid Optional user id
+ * @return array Endpoint items
+ */
+ public static function fetchItems(string $url, int $uid = 0)
+ {
+ $data = self::fetchContent($url, $uid);
+ if (empty($data)) {
+ return [];
+ }
+
+ if (!empty($data['orderedItems'])) {
+ $items = $data['orderedItems'];
+ } elseif (!empty($data['first']['orderedItems'])) {
+ $items = $data['first']['orderedItems'];
+ } elseif (!empty($data['first']) && is_string($data['first']) && ($data['first'] != $url)) {
+ return self::fetchItems($data['first'], $uid);
+ } else {
+ return [];
+ }
+
+ if (!empty($data['next']) && is_string($data['next'])) {
+ $items = array_merge($items, self::fetchItems($data['next'], $uid));
+ }
+
+ return $items;
+ }
+
+ /**
+ * Checks if the given contact url does support ActivityPub
+ *
+ * @param string $url profile url
+ * @param boolean $update true = always update, false = never update, null = update when not found or outdated
+ * @return boolean
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ * @throws \ImagickException
+ */
+ public static function isSupportedByContactUrl($url, $update = null)
+ {
+ return !empty(APContact::getByURL($url, $update));
+ }
}