diff --git a/plugins/FetchRemote/FetchRemotePlugin.php b/plugins/FetchRemote/FetchRemotePlugin.php new file mode 100644 index 0000000000..40d7550c58 --- /dev/null +++ b/plugins/FetchRemote/FetchRemotePlugin.php @@ -0,0 +1,119 @@ +. + */ + +/** + * Uses WebFinger to implement remote notice retrieval for GNU social. + * + * Depends on: WebFinger plugin + * + * @package GNUsocial + * @author Mikael Nordfeldth + */ + +if (!defined('GNUSOCIAL')) { exit(1); } + +class FetchRemotePlugin extends Plugin +{ + static function fetchNoticeFromUrl($url) + { + if (!common_valid_http_url($url)) { + throw new InvalidUrlException($url); + } + $host = parse_url($url, PHP_URL_HOST); + + // TODO: try to fetch directly, either by requesting Atom or + // Link headers/ elements with rel=alternate and compare + // the remote domain name with the notice URL's. + + if (!$stored instanceof Notice) { + common_log(LOG_INFO, 'Could not fetch remote notice from URL: '._ve($url)); + throw new ServerException('Could not fetch remote notice.'); + } + return $stored; + } + + public function onFetchRemoteNoticeWithSource($uri, Profile $source, &$stored) + { + if (common_valid_http_url($uri) && !Event::handle('FetchRemoteNoticeFromUrl', array($url, &$stored))) { + // Woopi, we got it straight from a URL-formatted URI! + return false; + } + + // Let's assume we can only do this over HTTPS and a proper + // WebFinger (RFC7033) endpoint on /.well-known/webfinger + try { + $source_url = parse_url($source->getUrl()); + } catch (InvalidUrlException $e) { + return true; + } + if ($source_url['scheme'] !== 'https') { + common_debug('Will not try to fetch remote notice from non-HTTPS capable profile source'); + return true; + } + + try { + $port = isset($source_url['port']) ? ":{$source_url['port']}" : ''; + $rfc7033 = "https://{$source_url['host']}{$port}/.well-known/webfinger"; + $params = ['resource' => $uri]; + common_debug(__METHOD__ . ": getting json data about notice from: {$rfc7033}?resource=$uri"); + $json = HTTPClient::quickGetJson($rfc7033, $params); + } catch (Exception $e) { + // NOPE NOPE NOPE NOPE + // couldn't get remote data about this notice's URI + // FIXME: try later? + return true; + } + + if (!isset($json->aliases)) { + // FIXME: malformed json for our current use, but maybe we could find rel="alternate" type="text/html"? + return true; + } + + common_debug(__METHOD__ . ": Found these aliases: "._ve($json->aliases)); + foreach ($json->aliases as $alias) { + try { + $stored = self::fetchNoticeFromUrl($url); + if ($stored instanceof Notice) { + // we're done here! all good, let's get back to business + return false; + } + } catch (InvalidUrlException $e) { + /// mmmmye, aliases might not always be HTTP(S) URLs. + } catch (Exception $e) { + // oh well, try the next one and see if it works better. + common_debug(__METHOD__ . ": {$e->getMessage()}"); + } + } + + // Nothing found, return true to continue processing the event + return true; + } + + public function onPluginVersion(array &$versions) + { + $versions[] = array('name' => 'FetchRemote', + 'version' => GNUSOCIAL_VERSION, + 'author' => 'Mikael Nordfeldth', + 'homepage' => 'http://www.gnu.org/software/social/', + // TRANS: Plugin description. + 'rawdescription' => _m('Retrieves remote notices (and serves local) via WebFinger')); + + return true; + } +}