Commit 327b8c86 authored by mmn's avatar mmn

Initial (not yet working) fetch remote plugin

parent 97d177f4
<?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;
}
}
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