<?php
/**
- * @copyright Copyright (C) 2010-2021, the Friendica project
+ * @copyright Copyright (C) 2010-2022, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
{
const PUBLIC_COLLECTION = 'as:Public';
const ACCOUNT_TYPES = ['as:Person', 'as:Organization', 'as:Service', 'as:Group', 'as:Application'];
- const CONTENT_TYPES = ['as:Note', 'as:Article', 'as:Video', 'as:Image', 'as:Event', 'as:Audio'];
+ const CONTENT_TYPES = ['as:Note', 'as:Article', 'as:Video', 'as:Image', 'as:Event', 'as:Audio', 'as:Page', 'as:Question'];
const ACTIVITY_TYPES = ['as:Like', 'as:Dislike', 'as:Accept', 'as:Reject', 'as:TentativeAccept'];
const TARGET_UNKNOWN = 0;
const TARGET_ANSWER = 6;
const TARGET_GLOBAL = 7;
- /**
- * Checks if the web request is done for the AP protocol
- *
- * @return bool is it AP?
- */
- public static function isRequest()
- {
- return stristr($_SERVER['HTTP_ACCEPT'] ?? '', 'application/activity+json') ||
- stristr($_SERVER['HTTP_ACCEPT'] ?? '', 'application/ld+json');
- }
-
/**
* Checks incoming message from the inbox
*
if (LDSignature::isSigned($activity)) {
$ld_signer = LDSignature::getSigner($activity);
if (empty($ld_signer)) {
- Logger::log('Invalid JSON-LD signature from ' . $actor, Logger::DEBUG);
+ Logger::info('Invalid JSON-LD signature from ' . $actor);
} elseif ($ld_signer != $http_signer) {
$signer[] = $ld_signer;
}
if (!empty($ld_signer && ($actor == $http_signer))) {
- Logger::log('The HTTP and the JSON-LD signature belong to ' . $ld_signer, Logger::DEBUG);
+ Logger::info('The HTTP and the JSON-LD signature belong to ' . $ld_signer);
$trust_source = true;
} elseif (!empty($ld_signer)) {
- Logger::log('JSON-LD signature is signed by ' . $ld_signer, Logger::DEBUG);
+ Logger::info('JSON-LD signature is signed by ' . $ld_signer);
$trust_source = true;
} elseif ($actor == $http_signer) {
- Logger::log('Bad JSON-LD signature, but HTTP signer fits the actor.', Logger::DEBUG);
+ Logger::info('Bad JSON-LD signature, but HTTP signer fits the actor.');
$trust_source = true;
} else {
- Logger::log('Invalid JSON-LD signature and the HTTP signer is different.', Logger::DEBUG);
+ Logger::info('Invalid JSON-LD signature and the HTTP signer is different.');
$trust_source = false;
}
} elseif ($actor == $http_signer) {
- Logger::log('Trusting post without JSON-LD signature, The actor fits the HTTP signer.', Logger::DEBUG);
+ Logger::info('Trusting post without JSON-LD signature, The actor fits the HTTP signer.');
$trust_source = true;
} else {
- Logger::log('No JSON-LD signature, different actor.', Logger::DEBUG);
+ Logger::info('No JSON-LD signature, different actor.');
$trust_source = false;
}
{
$id = JsonLD::fetchElement($activity, '@id');
if (!empty($id) && !$trust_source) {
- $fetched_activity = ActivityPub::fetchContent($id, $uid ?? 0);
+ $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
+
+ $fetched_activity = ActivityPub::fetchContent($id, $fetch_uid);
if (!empty($fetched_activity)) {
$object = JsonLD::compact($fetched_activity);
$fetched_id = JsonLD::fetchElement($object, '@id');
if (empty($activity['thread-completion']) && (empty($reception_types[$uid]) || in_array($reception_types[$uid], [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL]))) {
$reception_types[$uid] = self::TARGET_BCC;
}
- } else {
- // We possibly need some user to fetch private content,
- // so we fetch the first out ot the list.
- $uid = self::getFirstUserFromReceivers($receivers);
}
+ // We possibly need some user to fetch private content,
+ // so we fetch one out of the receivers if no uid is provided.
+ $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
+
$object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
if (empty($object_id)) {
- Logger::log('No object found', Logger::DEBUG);
+ Logger::info('No object found');
return [];
}
return [];
}
- $object_type = self::fetchObjectType($activity, $object_id, $uid);
+ $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
+
+ // Fetch the activity on Lemmy "Announce" messages (announces of activities)
+ if (($type == 'as:Announce') && in_array($object_type, array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
+ $data = ActivityPub::fetchContent($object_id, $fetch_uid);
+ if (!empty($data)) {
+ $type = $object_type;
+ $activity = JsonLD::compact($data);
+ // Some variables need to be refetched since the activity changed
+ $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
+ $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
+ $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
+ }
+ }
+
+ // Any activities on account types must not be altered
+ if (in_array($object_type, self::ACCOUNT_TYPES)) {
+ $object_data = [];
+ $object_data['id'] = JsonLD::fetchElement($activity, '@id');
+ $object_data['object_id'] = JsonLD::fetchElement($activity, 'as:object', '@id');
+ $object_data['object_actor'] = JsonLD::fetchElement($activity['as:object'], 'as:actor', '@id');
+ $object_data['object_object'] = JsonLD::fetchElement($activity['as:object'], 'as:object');
+ $object_data['object_type'] = JsonLD::fetchElement($activity['as:object'], '@type');
+ $object_data['push'] = $push;
+ } elseif (in_array($type, ['as:Create', 'as:Update', 'as:Announce']) || strpos($type, '#emojiReaction')) {
// Fetch the content only on activities where this matters
// We can receive "#emojiReaction" when fetching content from Hubzilla systems
- if (in_array($type, ['as:Create', 'as:Update', 'as:Announce']) || strpos($type, '#emojiReaction')) {
// Always fetch on "Announce"
- $object_data = self::fetchObject($object_id, $activity['as:object'], $trust_source && ($type != 'as:Announce'), $uid);
+ $object_data = self::fetchObject($object_id, $activity['as:object'], $trust_source && ($type != 'as:Announce'), $fetch_uid);
if (empty($object_data)) {
- Logger::log("Object data couldn't be processed", Logger::DEBUG);
+ Logger::info("Object data couldn't be processed");
return [];
}
}
} elseif (in_array($type, array_merge(self::ACTIVITY_TYPES, ['as:Follow'])) && in_array($object_type, self::CONTENT_TYPES)) {
// Create a mostly empty array out of the activity data (instead of the object).
- // This way we later don't have to check for the existence of ech individual array element.
+ // This way we later don't have to check for the existence of each individual array element.
$object_data = self::processObject($activity);
$object_data['name'] = $type;
$object_data['author'] = JsonLD::fetchElement($activity, 'as:actor', '@id');
// An Undo is done on the object of an object, so we need that type as well
if (($type == 'as:Undo') && !empty($object_data['object_object'])) {
- $object_data['object_object_type'] = self::fetchObjectType([], $object_data['object_object'], $uid);
+ $object_data['object_object_type'] = self::fetchObjectType([], $object_data['object_object'], $fetch_uid);
}
}
}
}
- Logger::log('Processing ' . $object_data['type'] . ' ' . $object_data['object_type'] . ' ' . $object_data['id'], Logger::DEBUG);
+ Logger::info('Processing ' . $object_data['type'] . ' ' . $object_data['object_type'] . ' ' . $object_data['id']);
return $object_data;
}
return;
}
+ // Lemmy is announcing activities.
+ // We are changing the announces into regular activities.
+ if (($type == 'as:Announce') && in_array($object_data['type'] ?? '', array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
+ $type = $object_data['type'];
+ }
+
if (!$trust_source) {
Logger::info('Activity trust could not be achieved.', ['id' => $object_data['object_id'], 'type' => $type, 'signer' => $signer, 'actor' => $actor, 'attributedTo' => $attributed_to]);
return;
if (!empty($activity['thread-completion'])) {
$object_data['thread-completion'] = $activity['thread-completion'];
}
+ if (!empty($activity['thread-children-type'])) {
+ $object_data['thread-children-type'] = $activity['thread-children-type'];
+ }
// Internal flag for posts that arrived via relay
if (!empty($activity['from-relay'])) {
break;
default:
- Logger::log('Unknown activity: ' . $type . ' ' . $object_data['object_type'], Logger::DEBUG);
+ Logger::info('Unknown activity: ' . $type . ' ' . $object_data['object_type']);
break;
}
}
+ /**
+ * Fetch a user id from an activity array
+ *
+ * @param array $activity
+ * @param string $actor
+ *
+ * @return int user id
+ */
+ public static function getBestUserForActivity(array $activity)
+ {
+ $uid = 0;
+ $actor = JsonLD::fetchElement($activity, 'as:actor', '@id') ?? '';
+
+ $receivers = self::getReceivers($activity, $actor);
+ foreach ($receivers as $receiver) {
+ if ($receiver['type'] == self::TARGET_GLOBAL) {
+ return 0;
+ }
+ if (empty($uid) || ($receiver['type'] == self::TARGET_TO)) {
+ $uid = $receiver['uid'];
+ }
+ }
+ return $uid;
+ }
+
/**
* Fetch the receiver list from an activity array
*
$data = ActivityPub::fetchContent($object_id, $uid);
if (!empty($data)) {
$object = JsonLD::compact($data);
- Logger::log('Fetched content for ' . $object_id, Logger::DEBUG);
+ Logger::info('Fetched content for ' . $object_id);
} else {
- Logger::log('Empty content for ' . $object_id . ', check if content is available locally.', Logger::DEBUG);
+ Logger::info('Empty content for ' . $object_id . ', check if content is available locally.');
$item = Post::selectFirst(Item::DELIVER_FIELDLIST, ['uri' => $object_id]);
if (!DBA::isResult($item)) {
- Logger::log('Object with url ' . $object_id . ' was not found locally.', Logger::DEBUG);
+ Logger::info('Object with url ' . $object_id . ' was not found locally.');
return false;
}
- Logger::log('Using already stored item for url ' . $object_id, Logger::DEBUG);
+ Logger::info('Using already stored item for url ' . $object_id);
$data = ActivityPub\Transmitter::createNote($item);
$object = JsonLD::compact($data);
}
return false;
}
} else {
- Logger::log('Using original object for url ' . $object_id, Logger::DEBUG);
+ Logger::info('Using original object for url ' . $object_id);
}
$type = JsonLD::fetchElement($object, '@type');
return false;
}
+ // Lemmy is resharing "create" activities instead of content
+ // We fetch the content from the activity.
+ if (in_array($type, ['as:Create'])) {
+ $object = $object['as:object'];
+ $type = JsonLD::fetchElement($object, '@type');
+ if (empty($type)) {
+ Logger::info('Empty type');
+ return false;
+ }
+ $object_data = self::processObject($object);
+ }
+
// We currently don't handle 'pt:CacheFile', but with this step we avoid logging
if (in_array($type, self::CONTENT_TYPES) || ($type == 'pt:CacheFile')) {
$object_data = self::processObject($object);
return self::fetchObject($object_id, [], false, $uid);
}
- Logger::log('Unhandled object type: ' . $type, Logger::DEBUG);
+ Logger::info('Unhandled object type: ' . $type);
return false;
}
// An empty "id" field is translated to "./" by the compactor, so we have to check for this content
if (empty($object_data['reply-to-id']) || ($object_data['reply-to-id'] == './')) {
$object_data['reply-to-id'] = $object_data['id'];
+
+ // On activities the "reply to" is the id of the object it refers to
+ if (in_array($object_data['object_type'], self::ACTIVITY_TYPES)) {
+ $object_id = JsonLD::fetchElement($object, 'as:object', '@id');
+ if (!empty($object_id)) {
+ $object_data['reply-to-id'] = $object_id;
+ }
+ }
} else {
// Some systems (e.g. GNU Social) don't reply to the "id" field but the "uri" field.
$replyToId = Item::getURIByLink($object_data['reply-to-id']);
$object_data = self::getSource($object, $object_data);
$object_data['start-time'] = JsonLD::fetchElement($object, 'as:startTime', '@value');
$object_data['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
- $object_data['adjust'] = JsonLD::fetchElement($object, 'dfrn:adjust', '@value');
$object_data['location'] = $location;
$object_data['latitude'] = JsonLD::fetchElement($object, 'as:location', 'as:latitude', '@type', 'as:Place');
$object_data['latitude'] = JsonLD::fetchElement($object_data, 'latitude', '@value');
$object_data['attachments'] = array_merge($object_data['attachments'], self::processAttachmentUrls($object['as:url'] ?? []));
}
+ // For page types we expect that the alternate url posts to some page.
+ // So we add this to the attachments if it differs from the id.
+ // Currently only Lemmy is using the page type.
+ if (($object_data['object_type'] == 'as:Page') && !empty($object_data['alternate-url']) && !Strings::compareLink($object_data['alternate-url'], $object_data['id'])) {
+ $object_data['attachments'][] = ['url' => $object_data['alternate-url']];
+ $object_data['alternate-url'] = null;
+ }
+
$receiverdata = self::getReceivers($object, $object_data['actor'], $object_data['tags'], true);
$receivers = $reception_types = [];
foreach ($receiverdata as $key => $data) {
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