Table "apcontact" is now in use / added functionality to handle JSON-LD
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@ -336,7 +336,7 @@ class Probe
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}
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if (in_array(defaults($data, 'network', ''), ['', Protocol::PHANTOM])) {
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$ap_profile = ActivityPub::fetchProfile($uri);
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$ap_profile = ActivityPub::probeProfile($uri);
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if (!empty($ap_profile) && ($ap_profile['network'] == Protocol::ACTIVITYPUB)) {
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$data = $ap_profile;
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}
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@ -19,7 +19,8 @@ use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Crypto;
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use Friendica\Content\Text\BBCode;
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use Friendica\Content\Text\HTML;
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use Friendica\Network\Probe;
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use Friendica\Core\Cache;
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use digitalbazaar\jsonld;
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/**
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* @brief ActivityPub Protocol class
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@ -57,6 +58,51 @@ class ActivityPub
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{
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const PUBLIC = 'https://www.w3.org/ns/activitystreams#Public';
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public static function jsonld_document_loader($url)
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{
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$recursion = 0;
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$x = debug_backtrace();
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if ($x) {
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foreach ($x as $n) {
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if ($n['function'] === __FUNCTION__) {
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$recursion ++;
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}
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}
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}
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if ($recursion > 5) {
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logger('jsonld bomb detected at: ' . $url);
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exit();
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}
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$result = Cache::get('jsonld_document_loader:' . $url);
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if (!is_null($result)) {
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return $result;
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}
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$data = jsonld_default_document_loader($url);
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Cache::set('jsonld_document_loader:' . $url, $data, CACHE_DAY);
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return $data;
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}
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public static function compactJsonLD($json)
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{
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jsonld_set_document_loader('Friendica\Protocol\ActivityPub::jsonld_document_loader');
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$context = (object)['as' => 'https://www.w3.org/ns/activitystreams',
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'w3sec' => 'https://w3id.org/security',
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'ostatus' => (object)['@id' => 'http://ostatus.org#', '@type' => '@id'],
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'vcard' => (object)['@id' => 'http://www.w3.org/2006/vcard/ns#', '@type' => '@id'],
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'uuid' => (object)['@id' => 'http://schema.org/identifier', '@type' => '@id']];
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$jsonobj = json_decode(json_encode($json));
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$compacted = jsonld_compact($jsonobj, $context);
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return json_decode(json_encode($compacted), true);
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}
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public static function isRequest()
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{
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return stristr(defaults($_SERVER, 'HTTP_ACCEPT', ''), 'application/activity+json') ||
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@ -167,8 +213,8 @@ class ActivityPub
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if ($term['type'] != TERM_MENTION) {
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continue;
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}
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$profile = Probe::uri($term['url'], Protocol::ACTIVITYPUB);
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if ($profile['network'] == Protocol::ACTIVITYPUB) {
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$profile = self::fetchprofile($term['url']);
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if (!empty($profile)) {
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$data['cc'][] = $profile['url'];
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}
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}
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@ -221,9 +267,9 @@ class ActivityPub
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if ($term['type'] != TERM_MENTION) {
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continue;
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}
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$profile = Probe::uri($term['url'], Protocol::ACTIVITYPUB);
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if ($profile['network'] == Protocol::ACTIVITYPUB) {
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$target = defaults($profile, 'batch', $profile['notify']);
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$profile = self::fetchprofile($term['url']);
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if (!empty($profile)) {
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$target = defaults($profile, 'sharedinbox', $profile['inbox']);
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$inboxes[$target] = $target;
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}
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}
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@ -239,9 +285,9 @@ class ActivityPub
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$cid = Contact::getIdForURL($term['url'], $item['uid']);
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if (!empty($cid) && in_array($cid, $receiver_list)) {
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$contact = DBA::selectFirst('contact', ['url'], ['id' => $cid, 'network' => Protocol::ACTIVITYPUB]);
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$profile = Probe::uri($contact['url'], Protocol::ACTIVITYPUB);
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if ($profile['network'] == Protocol::ACTIVITYPUB) {
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$target = defaults($profile, 'batch', $profile['notify']);
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$profile = self::fetchprofile($contact['url']);
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if (!empty($profile['network'])) {
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$target = defaults($profile, 'sharedinbox', $profile['inbox']);
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$inboxes[$target] = $target;
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}
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}
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@ -249,21 +295,21 @@ class ActivityPub
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foreach ($receiver_list as $receiver) {
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$contact = DBA::selectFirst('contact', ['url'], ['id' => $receiver, 'network' => Protocol::ACTIVITYPUB]);
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$profile = Probe::uri($contact['url'], Protocol::ACTIVITYPUB);
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if ($profile['network'] == Protocol::ACTIVITYPUB) {
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$target = defaults($profile, 'batch', $profile['notify']);
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$profile = self::fetchprofile($contact['url']);
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if (!empty($profile['network'])) {
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$target = defaults($profile, 'sharedinbox', $profile['inbox']);
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$inboxes[$target] = $target;
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}
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}
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}
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$profile = Probe::uri($target, Protocol::ACTIVITYPUB);
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if (!empty($profile['batch'])) {
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unset($inboxes[$profile['batch']]);
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$profile = self::fetchprofile($item['author-link']);
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if (!empty($profile['sharedinbox'])) {
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unset($inboxes[$profile['sharedinbox']]);
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}
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if (!empty($profile['notify'])) {
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unset($inboxes[$profile['notify']]);
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if (!empty($profile['inbox'])) {
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unset($inboxes[$profile['inbox']]);
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}
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return $inboxes;
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@ -389,7 +435,7 @@ class ActivityPub
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public static function transmitActivity($activity, $target, $uid)
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{
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$profile = Probe::uri($target, Protocol::ACTIVITYPUB);
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$profile = self::fetchprofile($target);
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$owner = User::getOwnerDataById($uid);
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@ -401,12 +447,12 @@ class ActivityPub
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'to' => $profile['url']];
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logger('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid, LOGGER_DEBUG);
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return self::transmit($data, $profile['notify'], $uid);
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return self::transmit($data, $profile['inbox'], $uid);
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}
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public static function transmitContactAccept($target, $id, $uid)
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{
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$profile = Probe::uri($target, Protocol::ACTIVITYPUB);
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$profile = self::fetchprofile($target);
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$owner = User::getOwnerDataById($uid);
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$data = ['@context' => 'https://www.w3.org/ns/activitystreams',
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@ -419,12 +465,12 @@ class ActivityPub
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'to' => $profile['url']];
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logger('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG);
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return self::transmit($data, $profile['notify'], $uid);
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return self::transmit($data, $profile['inbox'], $uid);
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}
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public static function transmitContactReject($target, $id, $uid)
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{
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$profile = Probe::uri($target, Protocol::ACTIVITYPUB);
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$profile = self::fetchprofile($target);
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$owner = User::getOwnerDataById($uid);
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$data = ['@context' => 'https://www.w3.org/ns/activitystreams',
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@ -437,12 +483,12 @@ class ActivityPub
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'to' => $profile['url']];
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logger('Sending reject to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG);
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return self::transmit($data, $profile['notify'], $uid);
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return self::transmit($data, $profile['inbox'], $uid);
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}
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public static function transmitContactUndo($target, $uid)
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{
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$profile = Probe::uri($target, Protocol::ACTIVITYPUB);
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$profile = self::fetchprofile($target);
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$id = System::baseUrl() . '/activity/' . System::createGUID();
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@ -457,7 +503,7 @@ class ActivityPub
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'to' => $profile['url']];
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logger('Sending undo to ' . $target . ' for user ' . $uid . ' with id ' . $id, LOGGER_DEBUG);
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return self::transmit($data, $profile['notify'], $uid);
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return self::transmit($data, $profile['inbox'], $uid);
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}
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/**
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@ -616,11 +662,11 @@ class ActivityPub
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{
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$url = (strpos($id, '#') ? substr($id, 0, strpos($id, '#')) : $id);
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$profile = Probe::uri($url, Protocol::ACTIVITYPUB);
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$profile = self::fetchprofile($url);
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if (!empty($profile)) {
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return $profile['pubkey'];
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} elseif ($url != $actor) {
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$profile = Probe::uri($actor, Protocol::ACTIVITYPUB);
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$profile = self::fetchprofile($actor);
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if (!empty($profile)) {
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return $profile['pubkey'];
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}
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@ -663,14 +709,29 @@ class ActivityPub
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return $ret;
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}
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/**
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* Fetches a profile from the given url
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*
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* @param string $url profile url
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* @return array
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*/
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public static function fetchProfile($url)
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public static function fetchprofile($url, $update = false)
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{
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if (empty($url)) {
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return false;
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}
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if (!$update) {
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$apcontact = DBA::selectFirst('apcontact', [], ['url' => $url]);
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if (DBA::isResult($apcontact)) {
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return $apcontact;
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}
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$apcontact = DBA::selectFirst('apcontact', [], ['alias' => $url]);
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if (DBA::isResult($apcontact)) {
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return $apcontact;
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}
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$apcontact = DBA::selectFirst('apcontact', [], ['addr' => $url]);
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if (DBA::isResult($apcontact)) {
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return $apcontact;
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}
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}
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if (empty(parse_url($url, PHP_URL_SCHEME))) {
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$url = self::addrToUrl($url);
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if (empty($url)) {
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@ -704,7 +765,19 @@ class ActivityPub
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unset($parts['path']);
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$apcontact['addr'] = $apcontact['nick'] . '@' . str_replace('//', '', Network::unparseURL($parts));
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$apcontact['pubkey'] = self::processElement($data, 'publicKey', 'publicKeyPem');
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$apcontact['pubkey'] = trim(self::processElement($data, 'publicKey', 'publicKeyPem'));
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// To-Do
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// manuallyApprovesFollowers
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// Unhandled
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// @context, tag, attachment, image, nomadicLocations, signature, following, followers, featured, movedTo, liked
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// Unhandled from Misskey
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// sharedInbox, isCat
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// Unhandled from Kroeg
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// kroeg:blocks, updated
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// Check if the address is resolvable
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if (self::addrToUrl($apcontact['addr']) == $apcontact['url']) {
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@ -723,7 +796,22 @@ class ActivityPub
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DBA::update('apcontact', $apcontact, ['url' => $url], true);
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// Array that is compatible to Probe::uri
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return $apcontact;
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}
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/**
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* Fetches a profile from the given url into an array that is compatible to Probe::uri
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*
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* @param string $url profile url
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* @return array
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*/
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public static function probeProfile($url)
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{
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$apcontact = self::fetchprofile($url, true);
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if (empty($apcontact)) {
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return false;
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}
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$profile = ['network' => Protocol::ACTIVITYPUB];
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$profile['nick'] = $apcontact['nick'];
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$profile['name'] = $apcontact['name'];
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@ -749,18 +837,6 @@ class ActivityPub
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}
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}
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// To-Do
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// type, manuallyApprovesFollowers
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// Unhandled
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// @context, tag, attachment, image, nomadicLocations, signature, following, followers, featured, movedTo, liked
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// Unhandled from Misskey
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// sharedInbox, isCat
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// Unhandled from Kroeg
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// kroeg:blocks, updated
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return $profile;
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}
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@ -953,8 +1029,8 @@ class ActivityPub
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$receivers = [];
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if (!empty($actor)) {
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$data = self::fetchContent($actor);
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$followers = defaults($data, 'followers', '');
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$profile = self::fetchprofile($actor);
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$followers = defaults($profile, 'followers', '');
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logger('Actor: ' . $actor . ' - Followers: ' . $followers, LOGGER_DEBUG);
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} else {
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@ -1365,7 +1441,7 @@ class ActivityPub
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$activity['id'] = $object['id'];
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$activity['to'] = defaults($object, 'to', []);
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$activity['cc'] = defaults($object, 'cc', []);
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$activity['actor'] = $activity['author'];
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$activity['actor'] = $child['author'];
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$activity['object'] = $object;
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$activity['published'] = $object['published'];
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$activity['type'] = 'Create';
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