3 * @copyright Copyright (C) 2020, Friendica
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Module;
24 use Friendica\BaseModule;
25 use Friendica\Core\Logger;
26 use Friendica\Core\System;
27 use Friendica\Database\DBA;
29 use Friendica\Model\Contact;
30 use Friendica\Model\Item;
31 use Friendica\Network\HTTPException;
32 use Friendica\Protocol\ActivityPub;
33 use Friendica\Util\HTTPSignature;
34 use Friendica\Util\Network;
35 use Friendica\Util\Strings;
40 class Objects extends BaseModule
42 public static function rawContent(array $parameters = [])
44 if (empty($parameters['guid'])) {
45 throw new HTTPException\BadRequestException();
48 if (!ActivityPub::isRequest()) {
49 DI::baseUrl()->redirect(str_replace('objects/', 'display/', DI::args()->getQueryString()));
52 $itemuri = DBA::selectFirst('item-uri', ['id'], ['guid' => $parameters['guid']]);
54 if (DBA::isResult($itemuri)) {
55 Logger::info('Provided GUID found.', ['guid' => $parameters['guid'], 'uri-id' => $itemuri['id']]);
57 // The item URI does not always contain the GUID. This means that we have to search the URL instead
58 $url = DI::baseUrl()->get() . '/' . DI::args()->getQueryString();
59 $nurl = Strings::normaliseLink($url);
60 $ssl_url = str_replace('http://', 'https://', $nurl);
62 $itemuri = DBA::selectFirst('item-uri', ['guid', 'id'], ['uri' => [$url, $nurl, $ssl_url]]);
63 if (DBA::isResult($itemuri)) {
64 Logger::info('URL found.', ['url' => $url, 'guid' => $itemuri['guid'], 'uri-id' => $itemuri['id']]);
66 Logger::info('URL not found.', ['url' => $url]);
67 throw new HTTPException\NotFoundException();
71 $item = Item::selectFirst(['id', 'uid', 'origin', 'author-link', 'changed', 'private', 'psid', 'gravity'],
72 ['uri-id' => $itemuri['id']], ['order' => ['origin' => true]]);
74 if (!DBA::isResult($item)) {
75 throw new HTTPException\NotFoundException();
78 $validated = in_array($item['private'], [Item::PUBLIC, Item::UNLISTED]);
81 $requester = HTTPSignature::getSigner('', $_SERVER);
82 if (!empty($requester) && $item['origin']) {
83 $requester_id = Contact::getIdForURL($requester, $item['uid']);
84 if (!empty($requester_id)) {
85 $permissionSets = DI::permissionSet()->selectByContactId($requester_id, $item['uid']);
86 if (!empty($permissionSets)) {
87 $psid = array_merge($permissionSets->column('id'),
88 [DI::permissionSet()->getIdFromACL($item['uid'], '', '', '', '')]);
89 $validated = in_array($item['psid'], $psid);
95 // Valid items are original post or posted from this node (including in the case of a forum)
96 if (!$validated || !$item['origin'] && (parse_url($item['author-link'], PHP_URL_HOST) != parse_url(DI::baseUrl()->get(), PHP_URL_HOST))) {
97 throw new HTTPException\NotFoundException();
100 $etag = md5($parameters['guid'] . '-' . $item['changed']);
101 $last_modified = $item['changed'];
102 Network::checkEtagModified($etag, $last_modified);
104 if (empty($parameters['activity']) && ($item['gravity'] != GRAVITY_ACTIVITY)) {
105 $activity = ActivityPub\Transmitter::createActivityFromItem($item['id'], true);
106 $activity['type'] = $activity['type'] == 'Update' ? 'Create' : $activity['type'];
108 // Only display "Create" activity objects here, no reshares or anything else
109 if (empty($activity['object']) || ($activity['type'] != 'Create')) {
110 throw new HTTPException\NotFoundException();
113 $data = ['@context' => ActivityPub::CONTEXT];
114 $data = array_merge($data, $activity['object']);
115 } elseif (empty($parameters['activity']) || in_array($parameters['activity'],
116 ['Create', 'Announce', 'Update', 'Like', 'Dislike', 'Accept', 'Reject',
117 'TentativeAccept', 'Follow', 'Add'])) {
118 $data = ActivityPub\Transmitter::createActivityFromItem($item['id']);
120 throw new HTTPException\NotFoundException();
122 if (!empty($parameters['activity']) && ($parameters['activity'] != 'Create')) {
123 $data['type'] = $parameters['activity'];
124 $data['id'] = str_replace('/Create', '/' . $parameters['activity'], $data['id']);
127 throw new HTTPException\NotFoundException();
130 // Relaxed CORS header for public items
131 header('Access-Control-Allow-Origin: *');
132 System::jsonExit($data, 'application/activity+json');