--- /dev/null
+<?php
+/*
+ * GNU social - a federating social network
+ * Copyright (C) 2013-2014, Free Software Foundation, Inc.
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Uses WebFinger to implement remote notice retrieval for GNU social.
+ *
+ * Depends on: WebFinger plugin
+ *
+ * @package GNUsocial
+ * @author Mikael Nordfeldth <mmn@hethane.se>
+ */
+
+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/<head> 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;
+ }
+}
projects / quix0rs-gnu-social.git / commitdiff