forked from GNUsocial/gnu-social
[ActivityPub] Make remote mentions great again
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18D2D35001FBFAB0
@ -125,7 +125,7 @@ class FreeNetwork extends Component
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}
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} else {
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try {
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if (filter_var($resource, \FILTER_VALIDATE_URL) !== false) {
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if (Common::isValidHttpUrl($resource)) {
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// This means $resource is a valid url
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$resource_parts = parse_url($resource);
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// TODO: Use URLMatcher
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@ -5,21 +5,32 @@ declare(strict_types = 1);
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namespace Plugin\ActivityPub;
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use App\Core\Event;
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use App\Core\Log;
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use App\Core\Modules\Plugin;
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use App\Core\Router\RouteLoader;
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use App\Core\Router\Router;
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use App\Entity\Actor;
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use App\Entity\LocalUser;
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use App\Util\Common;
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use App\Util\Exception\NicknameEmptyException;
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use App\Util\Exception\NicknameException;
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use App\Util\Exception\NicknameInvalidException;
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use App\Util\Exception\NicknameNotAllowedException;
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use App\Util\Exception\NicknameTakenException;
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use App\Util\Exception\NicknameTooLongException;
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use App\Util\Exception\NoSuchActorException;
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use App\Util\Nickname;
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use Exception;
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use Plugin\ActivityPub\Controller\Inbox;
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use Plugin\ActivityPub\Entity\ActivitypubActor;
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use Plugin\ActivityPub\Util\Explorer;
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use Plugin\ActivityPub\Util\Response\ActorResponse;
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use Plugin\ActivityPub\Util\Response\NoteResponse;
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use Plugin\ActivityPub\Util\Response\TypeResponse;
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use XML_XRD;
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use XML_XRD_Element_Link;
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use function count;
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use const PREG_SET_ORDER;
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class ActivityPub extends Plugin
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{
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@ -78,7 +89,7 @@ class ActivityPub extends Plugin
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public static function getActorByUri(string $resource, ?bool $attempt_fetch = true): Actor
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{
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// Try local
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if (filter_var($resource, \FILTER_VALIDATE_URL) !== false) {
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if (Common::isValidHttpUrl($resource)) {
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// This means $resource is a valid url
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$resource_parts = parse_url($resource);
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// TODO: Use URLMatcher
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@ -88,9 +99,9 @@ class ActivityPub extends Plugin
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$renick = '/\/@(' . Nickname::DISPLAY_FMT . ')\/?/m';
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// actor_view_id
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$reuri = '/\/actor\/(\d+)\/?/m';
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if (preg_match_all($renick, $str, $matches, \PREG_SET_ORDER, 0) === 1) {
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if (preg_match_all($renick, $str, $matches, PREG_SET_ORDER, 0) === 1) {
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return LocalUser::getWithPK(['nickname' => $matches[0][1]])->getActor();
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} elseif (preg_match_all($reuri, $str, $matches, \PREG_SET_ORDER, 0) === 1) {
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} elseif (preg_match_all($reuri, $str, $matches, PREG_SET_ORDER, 0) === 1) {
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return Actor::getById((int) $matches[0][1]);
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}
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}
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@ -109,7 +120,7 @@ class ActivityPub extends Plugin
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*/
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public function onControllerResponseInFormat(string $route, array $accept_header, array $vars, ?TypeResponse &$response = null): bool
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{
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if (\count(array_intersect(self::$accept_headers, $accept_header)) === 0) {
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if (count(array_intersect(self::$accept_headers, $accept_header)) === 0) {
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return Event::next;
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}
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switch ($route) {
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@ -140,6 +151,10 @@ class ActivityPub extends Plugin
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}
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}
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/********************************************************
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* WebFinger Events *
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********************************************************/
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/**
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* Add activity+json mimetype on WebFinger
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*
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@ -158,9 +173,195 @@ class ActivityPub extends Plugin
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return Event::next;
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}
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public function onFreeNetworkGenerateLocalActorUri(int $actor_id, ?array &$actor_uri): bool
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/**
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* Webfinger matches: @user@example.com or even @user--one.george_orwell@1984.biz
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*
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* @param string $text The text from which to extract webfinger IDs
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* @param string $preMention Character(s) that signals a mention ('@', '!'...)
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* @return array The matching IDs (without $preMention) and each respective position in the given string.
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*/
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public static function extractWebfingerIds(string $text, string $preMention='@'): array
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{
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$actor_uri['ActivityPub'] = Router::url('actor_view_id', ['id' => $actor_id], Router::ABSOLUTE_URL);
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$wmatches = [];
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$result = preg_match_all(
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'/'.Nickname::BEFORE_MENTIONS.preg_quote($preMention, '/').'('.Nickname::WEBFINGER_FMT.')/',
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$text,
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$wmatches,
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PREG_OFFSET_CAPTURE
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);
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if ($result === false) {
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Log::error(__METHOD__ . ': Error parsing webfinger IDs from text (preg_last_error=='.preg_last_error().').');
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return [];
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} elseif (($n_matches = count($wmatches)) != 0) {
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Log::debug((sprintf('Found %d matches for WebFinger IDs: %s', $n_matches, print_r($wmatches, true))));
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}
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return $wmatches[1];
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}
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/**
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* Profile URL matches: @example.com/mublog/user
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*
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* @param string $text The text from which to extract URL mentions
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* @param string $preMention Character(s) that signals a mention ('@', '!'...)
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* @return array The matching URLs (without @ or acct:) and each respective position in the given string.
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*/
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public static function extractUrlMentions(string $text, string $preMention='@'): array
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{
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$wmatches = [];
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// In the regexp below we need to match / _before_ URL_REGEX_VALID_PATH_CHARS because it otherwise gets merged
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// with the TLD before (but / is in URL_REGEX_VALID_PATH_CHARS anyway, it's just its positioning that is important)
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$result = preg_match_all(
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'/(?:^|\s+)'.preg_quote($preMention, '/').'('.URL_REGEX_DOMAIN_NAME.'(?:\/['.URL_REGEX_VALID_PATH_CHARS.']*)*)/',
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$text,
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$wmatches,
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PREG_OFFSET_CAPTURE
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);
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if ($result === false) {
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Log::error(__METHOD__ . ': Error parsing profile URL mentions from text (preg_last_error=='.preg_last_error().').');
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return [];
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} elseif (count($wmatches)) {
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Log::debug((sprintf('Found %d matches for profile URL mentions: %s', count($wmatches), print_r($wmatches, true))));
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}
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return $wmatches[1];
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}
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/**
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* Find any explicit remote mentions. Accepted forms:
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* Webfinger: @user@example.com
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* Profile link: @example.com/mublog/user
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* @param Actor $sender
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* @param string $text input markup text
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* @param $mentions
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* @return bool hook return value
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*/
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public function onEndFindMentions(Actor $sender, string $text, array &$mentions): bool
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{
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$matches = [];
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foreach (self::extractWebfingerIds($text, '@') as $wmatch) {
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list($target, $pos) = $wmatch;
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Log::info("Checking webfinger person '$target'");
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$profile = null;
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try {
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$aprofile = ActivitypubActor::getByAddr($target);
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$profile = Actor::getById($aprofile->getActorId());
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} catch (Exception $e) {
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Log::error("Webfinger check failed: " . $e->getMessage());
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continue;
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}
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assert($profile instanceof Actor);
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$displayName = $profile->getFullname() ?? $profile->getNickname() ?? $target; // TODO: we could do getBestName() or getFullname() here
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$matches[$pos] = [
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'mentioned' => [$profile],
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'type' => 'mention',
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'text' => $displayName,
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'position' => $pos,
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'length' => mb_strlen($target),
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'url' => $aprofile->getUri()
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];
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}
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foreach (self::extractUrlMentions($text) as $wmatch) {
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list($target, $pos) = $wmatch;
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$schemes = array('https', 'http');
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foreach ($schemes as $scheme) {
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$url = "$scheme://$target";
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Log::info("Checking profile address '$url'");
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try {
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$aprofile = ActivitypubActor::fromUri($url);
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$profile = Actor::getById($aprofile->getActorId());
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$displayName = $profile->getFullname() ?? $profile->getNickname() ?? $target; // TODO: we could do getBestName() or getFullname() here
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$matches[$pos] = ['mentioned' => [$profile],
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'type' => 'mention',
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'text' => $displayName,
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'position' => $pos,
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'length' => mb_strlen($target),
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'url' => $aprofile->getUri()
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];
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break;
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} catch (Exception $e) {
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Log::error("Profile check failed: " . $e->getMessage());
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}
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}
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}
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foreach ($mentions as $i => $other) {
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// If we share a common prefix with a local user, override it!
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$pos = $other['position'];
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if (isset($matches[$pos])) {
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$mentions[$i] = $matches[$pos];
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unset($matches[$pos]);
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}
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}
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foreach ($matches as $mention) {
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$mentions[] = $mention;
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}
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return Event::next;
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}
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/**
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* Allow remote profile references to be used in commands:
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* sub update@status.net
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* whois evan@identi.ca
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* reply http://identi.ca/evan hey what's up
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*
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* @param Command $command
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* @param string $arg
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* @param Actor &$profile
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* @return bool hook return code
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* @author GNU social
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*/
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//public function onStartCommandGetProfile($command, $arg, &$profile)
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//{
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// $aprofile = ActivitypubActor::fromUri($arg);
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// if (!($aprofile instanceof ActivitypubActor)) {
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// // No remote ActivityPub profile found
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// return Event::next;
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// }
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//
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// return Event::stop;
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//}
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/********************************************************
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* Discovery Events *
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********************************************************/
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/**
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* Profile from URI.
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*
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* @author GNU social
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* @param string $uri
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* @param Actor &$profile in/out param: Profile got from URI
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* @return mixed hook return code
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*/
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//public function onStartGetProfileFromURI($uri, &$profile)
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//{
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// try {
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// $profile = Explorer::get_profile_from_url($uri);
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// return Event::stop;
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// } catch (Exception) {
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// return Event::next; // It's not an ActivityPub profile as far as we know, continue event handling
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// }
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//}
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/**
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* Try to grab and store the remote profile by the given uri
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*
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* @param string $uri
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* @param Actor|null &$profile
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* @return bool
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*/
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//public function onRemoteFollowPullProfile(string $uri, ?Actor &$profile): bool
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//{
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// $aprofile = ActivitypubActor::fromUri($uri);
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// if (!($aprofile instanceof ActivitypubActor)) {
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// // No remote ActivityPub profile found
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// return Event::next;
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// }
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//
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// return is_null($profile) ? Event::next : Event::stop;
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//}
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}
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