X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FModule%2FObjects.php;h=bb68adeb3bb8cf7b35563e05ca03f840f835fc78;hb=6778d4f7ce62877f46b964d2a6abc17e8faa47bd;hp=558b274919ce33bad609074dec5aac569ceca9e0;hpb=fe7f9d386d21d56079ef1bf9cc85b16bcf9e1b3c;p=friendica.git

diff --git a/src/Module/Objects.php b/src/Module/Objects.php
index 558b274919..bb68adeb3b 100644
--- a/src/Module/Objects.php
+++ b/src/Module/Objects.php
@@ -1,50 +1,113 @@
 <?php
 /**
- * @file src/Module/Objects.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\Module;
 
 use Friendica\BaseModule;
-use Friendica\Protocol\ActivityPub;
 use Friendica\Core\System;
-use Friendica\Model\Item;
 use Friendica\Database\DBA;
+use Friendica\DI;
+use Friendica\Model\Contact;
+use Friendica\Model\Item;
+use Friendica\Network\HTTPException;
+use Friendica\Protocol\ActivityPub;
 use Friendica\Util\HTTPSignature;
+use Friendica\Util\Network;
 
 /**
  * ActivityPub Objects
  */
 class Objects extends BaseModule
 {
-	public static function rawContent()
+	public static function rawContent(array $parameters = [])
 	{
-		$a = self::getApp();
-
-		if (empty($a->argv[1])) {
-			System::httpExit(404);
+		if (empty($parameters['guid'])) {
+			throw new HTTPException\BadRequestException();
 		}
 
 		if (!ActivityPub::isRequest()) {
-			$a->internalRedirect(str_replace('objects/', 'display/', $a->query_string));
+			DI::baseUrl()->redirect(str_replace('objects/', 'display/', DI::args()->getQueryString()));
 		}
 
-		/// @todo Add Authentication to enable fetching of non public content
-		// $requester = HTTPSignature::getSigner('', $_SERVER);
+		$item = Item::selectFirst(['id', 'uid', 'origin', 'author-link', 'changed', 'private', 'psid', 'gravity'],
+			['guid' => $parameters['guid']], ['order' => ['origin' => true]]);
 
-		// At first we try the original post with that guid
-		$item = Item::selectFirst(['id'], ['guid' => $a->argv[1], 'origin' => true, 'private' => false]);
 		if (!DBA::isResult($item)) {
-			// If no original post could be found, it could possibly be a forum post, there we remove the "origin" field.
-			$item = Item::selectFirst(['id', 'author-link'], ['guid' => $a->argv[1], 'private' => false]);
-			if (!DBA::isResult($item) || !strstr($item['author-link'], System::baseUrl())) {
-				System::httpExit(404);
+			throw new HTTPException\NotFoundException();
+		}
+
+		$validated = in_array($item['private'], [Item::PUBLIC, Item::UNLISTED]);
+
+		if (!$validated) {
+			$requester = HTTPSignature::getSigner('', $_SERVER);
+			if (!empty($requester) && $item['origin']) {
+				$requester_id = Contact::getIdForURL($requester, $item['uid']);
+				if (!empty($requester_id)) {
+					$permissionSets = DI::permissionSet()->selectByContactId($requester_id, $item['uid']);
+					if (!empty($permissionSets)) {
+						$psid = array_merge($permissionSets->column('id'),
+							[DI::permissionSet()->getIdFromACL($item['uid'], '', '', '', '')]);
+						$validated = in_array($item['psid'], $psid);
+					}
+				}
 			}
 		}
 
-		$data = ActivityPub\Transmitter::createObjectFromItemID($item['id']);
+		// Valid items are original post or posted from this node (including in the case of a forum)
+		if (!$validated || !$item['origin'] && (parse_url($item['author-link'], PHP_URL_HOST) != parse_url(DI::baseUrl()->get(), PHP_URL_HOST))) {
+			throw new HTTPException\NotFoundException();
+		}
+
+		$etag          = md5($parameters['guid'] . '-' . $item['changed']);
+		$last_modified = $item['changed'];
+		Network::checkEtagModified($etag, $last_modified);
+
+		if (empty($parameters['activity']) && ($item['gravity'] != GRAVITY_ACTIVITY)) {
+			$activity = ActivityPub\Transmitter::createActivityFromItem($item['id'], true);
+			$activity['type'] = $activity['type'] == 'Update' ? 'Create' : $activity['type'];
+
+			// Only display "Create" activity objects here, no reshares or anything else
+			if (empty($activity['object']) || ($activity['type'] != 'Create')) {
+				throw new HTTPException\NotFoundException();
+			}
+
+			$data = ['@context' => ActivityPub::CONTEXT];
+			$data = array_merge($data, $activity['object']);
+		} elseif (empty($parameters['activity']) || in_array($parameters['activity'],
+			['Create', 'Announce', 'Update', 'Like', 'Dislike', 'Accept', 'Reject',
+			'TentativeAccept', 'Follow', 'Add'])) {
+			$data = ActivityPub\Transmitter::createActivityFromItem($item['id']);
+			if (empty($data)) {
+				throw new HTTPException\NotFoundException();
+			}
+			if (!empty($parameters['activity']) && ($parameters['activity'] != 'Create')) {
+				$data['type'] = $parameters['activity'];
+				$data['id'] = str_replace('/Create', '/' . $parameters['activity'], $data['id']);
+			}
+		} else {
+			throw new HTTPException\NotFoundException();
+		}
 
-		header('Content-Type: application/activity+json');
-		echo json_encode($data);
-		exit();
+		// Relaxed CORS header for public items
+		header('Access-Control-Allow-Origin: *');
+		System::jsonExit($data, 'application/activity+json');
 	}
 }