345 lines
11 KiB
PHP
345 lines
11 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (C) 2010-2022, the Friendica project
|
|
*
|
|
* @license GNU AGPL version 3 or any later version
|
|
*
|
|
* 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 <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
namespace Friendica\Protocol;
|
|
|
|
use Friendica\Content\Text\BBCode;
|
|
use Friendica\Core\Logger;
|
|
use Friendica\Core\Protocol;
|
|
use Friendica\Database\DBA;
|
|
use Friendica\DI;
|
|
use Friendica\Model\APContact;
|
|
use Friendica\Model\Contact;
|
|
use Friendica\Model\GServer;
|
|
use Friendica\Model\Post;
|
|
use Friendica\Model\Search;
|
|
use Friendica\Model\Tag;
|
|
use Friendica\Util\DateTimeFormat;
|
|
use Friendica\Util\Strings;
|
|
|
|
/**
|
|
* Base class for relay handling
|
|
* @see https://github.com/jaywink/social-relay
|
|
* @see https://wiki.diasporafoundation.org/Relay_servers_for_public_posts
|
|
*/
|
|
class Relay
|
|
{
|
|
const SCOPE_NONE = '';
|
|
const SCOPE_ALL = 'all';
|
|
const SCOPE_TAGS = 'tags';
|
|
|
|
/**
|
|
* Check if a post is wanted
|
|
*
|
|
* @param array $tags
|
|
* @param string $body
|
|
* @param int $authorid
|
|
* @param string $url
|
|
* @return boolean "true" is the post is wanted by the system
|
|
*/
|
|
public static function isSolicitedPost(array $tags, string $body, int $authorid, string $url, string $network = '')
|
|
{
|
|
$config = DI::config();
|
|
|
|
$scope = $config->get('system', 'relay_scope');
|
|
|
|
if ($scope == self::SCOPE_NONE) {
|
|
Logger::info('Server does not accept relay posts - rejected', ['network' => $network, 'url' => $url]);
|
|
return false;
|
|
}
|
|
|
|
if (Contact::isBlocked($authorid)) {
|
|
Logger::info('Author is blocked - rejected', ['author' => $authorid, 'network' => $network, 'url' => $url]);
|
|
return false;
|
|
}
|
|
|
|
if (Contact::isHidden($authorid)) {
|
|
Logger::info('Author is hidden - rejected', ['author' => $authorid, 'network' => $network, 'url' => $url]);
|
|
return false;
|
|
}
|
|
|
|
$systemTags = [];
|
|
$userTags = [];
|
|
$denyTags = [];
|
|
|
|
if ($scope == self::SCOPE_TAGS) {
|
|
$server_tags = $config->get('system', 'relay_server_tags');
|
|
$tagitems = explode(',', mb_strtolower($server_tags));
|
|
foreach ($tagitems as $tag) {
|
|
$systemTags[] = trim($tag, '# ');
|
|
}
|
|
|
|
if ($config->get('system', 'relay_user_tags')) {
|
|
$userTags = Search::getUserTags();
|
|
}
|
|
}
|
|
|
|
$tagList = array_unique(array_merge($systemTags, $userTags));
|
|
|
|
$deny_tags = $config->get('system', 'relay_deny_tags');
|
|
$tagitems = explode(',', mb_strtolower($deny_tags));
|
|
foreach ($tagitems as $tag) {
|
|
$tag = trim($tag, '# ');
|
|
$denyTags[] = $tag;
|
|
}
|
|
|
|
if (!empty($tagList) || !empty($denyTags)) {
|
|
$content = mb_strtolower(BBCode::toPlaintext($body, false));
|
|
|
|
foreach ($tags as $tag) {
|
|
$tag = mb_strtolower($tag);
|
|
if (in_array($tag, $denyTags)) {
|
|
Logger::info('Unwanted hashtag found - rejected', ['hashtag' => $tag, 'network' => $network, 'url' => $url]);
|
|
return false;
|
|
}
|
|
|
|
if (in_array($tag, $tagList)) {
|
|
Logger::info('Subscribed hashtag found - accepted', ['hashtag' => $tag, 'network' => $network, 'url' => $url]);
|
|
return true;
|
|
}
|
|
|
|
// We check with "strpos" for performance issues. Only when this is true, the regular expression check is used
|
|
// RegExp is taken from here: https://medium.com/@shiba1014/regex-word-boundaries-with-unicode-207794f6e7ed
|
|
if ((strpos($content, $tag) !== false) && preg_match('/(?<=[\s,.:;"\']|^)' . preg_quote($tag, '/') . '(?=[\s,.:;"\']|$)/', $content)) {
|
|
Logger::info('Subscribed hashtag found in content - accepted', ['hashtag' => $tag, 'network' => $network, 'url' => $url]);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($scope == self::SCOPE_ALL) {
|
|
Logger::info('Server accept all posts - accepted', ['network' => $network, 'url' => $url]);
|
|
return true;
|
|
}
|
|
|
|
Logger::info('No matching hashtags found - rejected', ['network' => $network, 'url' => $url]);
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Update or insert a relay contact
|
|
*
|
|
* @param array $gserver Global server record
|
|
* @param array $fields Optional network specific fields
|
|
* @throws \Exception
|
|
*/
|
|
public static function updateContact(array $gserver, array $fields = [])
|
|
{
|
|
if (in_array($gserver['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
|
|
$system = APContact::getByURL($gserver['url'] . '/friendica');
|
|
if (!empty($system['sharedinbox'])) {
|
|
Logger::info('Sucessfully probed for relay contact', ['server' => $gserver['url']]);
|
|
$id = Contact::updateFromProbeByURL($system['url']);
|
|
Logger::info('Updated relay contact', ['server' => $gserver['url'], 'id' => $id]);
|
|
return;
|
|
}
|
|
}
|
|
|
|
$condition = ['uid' => 0, 'gsid' => $gserver['id'], 'contact-type' => Contact::TYPE_RELAY];
|
|
$old = DBA::selectFirst('contact', [], $condition);
|
|
if (!DBA::isResult($old)) {
|
|
$condition = ['uid' => 0, 'nurl' => Strings::normaliseLink($gserver['url'])];
|
|
$old = DBA::selectFirst('contact', [], $condition);
|
|
if (DBA::isResult($old)) {
|
|
$fields['gsid'] = $gserver['id'];
|
|
$fields['contact-type'] = Contact::TYPE_RELAY;
|
|
Logger::info('Assigning missing data for relay contact', ['server' => $gserver['url'], 'id' => $old['id']]);
|
|
}
|
|
} elseif (empty($fields)) {
|
|
Logger::info('No content to update, quitting', ['server' => $gserver['url']]);
|
|
return;
|
|
}
|
|
|
|
if (DBA::isResult($old)) {
|
|
$fields['updated'] = DateTimeFormat::utcNow();
|
|
|
|
Logger::info('Update relay contact', ['server' => $gserver['url'], 'id' => $old['id'], 'fields' => $fields]);
|
|
Contact::update($fields, ['id' => $old['id']], $old);
|
|
} else {
|
|
$default = ['created' => DateTimeFormat::utcNow(),
|
|
'name' => 'relay', 'nick' => 'relay', 'url' => $gserver['url'],
|
|
'nurl' => Strings::normaliseLink($gserver['url']),
|
|
'network' => Protocol::DIASPORA, 'uid' => 0,
|
|
'batch' => $gserver['url'] . '/receive/public',
|
|
'rel' => Contact::FOLLOWER, 'blocked' => false,
|
|
'pending' => false, 'writable' => true,
|
|
'gsid' => $gserver['id'],
|
|
'baseurl' => $gserver['url'], 'contact-type' => Contact::TYPE_RELAY];
|
|
|
|
$fields = array_merge($default, $fields);
|
|
|
|
Logger::info('Create relay contact', ['server' => $gserver['url'], 'fields' => $fields]);
|
|
Contact::insert($fields);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Mark the relay contact of the given contact for archival
|
|
* This is called whenever there is a communication issue with the server.
|
|
* It avoids sending stuff to servers who don't exist anymore.
|
|
* The relay contact is a technical contact entry that exists once per server.
|
|
*
|
|
* @param array $contact of the relay contact
|
|
*/
|
|
public static function markForArchival(array $contact)
|
|
{
|
|
if (!empty($contact['contact-type']) && ($contact['contact-type'] == Contact::TYPE_RELAY)) {
|
|
// This is already the relay contact, we don't need to fetch it
|
|
$relay_contact = $contact;
|
|
} elseif (empty($contact['baseurl'])) {
|
|
if (!empty($contact['batch'])) {
|
|
$condition = ['uid' => 0, 'network' => Protocol::FEDERATED, 'batch' => $contact['batch'], 'contact-type' => Contact::TYPE_RELAY];
|
|
$relay_contact = DBA::selectFirst('contact', [], $condition);
|
|
} else {
|
|
return;
|
|
}
|
|
} else {
|
|
$gserver = ['id' => $contact['gsid'] ?: GServer::getID($contact['baseurl'], true),
|
|
'url' => $contact['baseurl'], 'network' => $contact['network']];
|
|
$relay_contact = self::getContact($gserver, []);
|
|
}
|
|
|
|
if (!empty($relay_contact)) {
|
|
Logger::info('Relay contact will be marked for archival', ['id' => $relay_contact['id'], 'url' => $relay_contact['url']]);
|
|
Contact::markForArchival($relay_contact);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a list of servers that we serve via the direct relay
|
|
*
|
|
* @param integer $item_id id of the item that is sent
|
|
* @param array $contacts Previously fetched contacts
|
|
* @param array $networks Networks of the relay servers
|
|
*
|
|
* @return array of relay servers
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function getDirectRelayList(int $item_id)
|
|
{
|
|
$serverlist = [];
|
|
|
|
if (!DI::config()->get("system", "relay_directly", false)) {
|
|
return [];
|
|
}
|
|
|
|
// We distribute our stuff based on the parent to ensure that the thread will be complete
|
|
$parent = Post::selectFirst(['uri-id'], ['id' => $item_id]);
|
|
if (!DBA::isResult($parent)) {
|
|
return [];
|
|
}
|
|
|
|
// Servers that want to get all content
|
|
$servers = DBA::select('gserver', ['id', 'url', 'network'], ['relay-subscribe' => true, 'relay-scope' => 'all']);
|
|
while ($server = DBA::fetch($servers)) {
|
|
$serverlist[$server['id']] = $server;
|
|
}
|
|
DBA::close($servers);
|
|
|
|
// All tags of the current post
|
|
$tags = DBA::select('tag-view', ['name'], ['uri-id' => $parent['uri-id'], 'type' => Tag::HASHTAG]);
|
|
$taglist = [];
|
|
while ($tag = DBA::fetch($tags)) {
|
|
$taglist[] = $tag['name'];
|
|
}
|
|
DBA::close($tags);
|
|
|
|
// All servers who wants content with this tag
|
|
$tagserverlist = [];
|
|
if (!empty($taglist)) {
|
|
$tagserver = DBA::select('gserver-tag', ['gserver-id'], ['tag' => $taglist]);
|
|
while ($server = DBA::fetch($tagserver)) {
|
|
$tagserverlist[] = $server['gserver-id'];
|
|
}
|
|
DBA::close($tagserver);
|
|
}
|
|
|
|
// All adresses with the given id
|
|
if (!empty($tagserverlist)) {
|
|
$servers = DBA::select('gserver', ['id', 'url', 'network'], ['relay-subscribe' => true, 'relay-scope' => 'tags', 'id' => $tagserverlist]);
|
|
while ($server = DBA::fetch($servers)) {
|
|
$serverlist[$server['id']] = $server;
|
|
}
|
|
DBA::close($servers);
|
|
}
|
|
|
|
$contacts = [];
|
|
|
|
// Now we are collecting all relay contacts
|
|
foreach ($serverlist as $gserver) {
|
|
// We don't send messages to ourselves
|
|
if (Strings::compareLink($gserver['url'], DI::baseUrl())) {
|
|
continue;
|
|
}
|
|
$contact = self::getContact($gserver);
|
|
if (empty($contact)) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
return $contacts;
|
|
}
|
|
|
|
/**
|
|
* Return a list of relay servers
|
|
*
|
|
* @param array $fields Field list
|
|
* @return array
|
|
* @throws Exception
|
|
*/
|
|
public static function getList($fields = []):array
|
|
{
|
|
return DBA::selectToArray('apcontact', $fields,
|
|
["`type` = ? AND `url` IN (SELECT `url` FROM `contact` WHERE `uid` = ? AND `rel` = ?)", 'Application', 0, Contact::FRIEND]);
|
|
}
|
|
|
|
/**
|
|
* Return a contact for a given server address or creates a dummy entry
|
|
*
|
|
* @param array $gserver Global server record
|
|
* @param array $fields Fieldlist
|
|
* @return array with the contact
|
|
* @throws \Exception
|
|
*/
|
|
private static function getContact(array $gserver, array $fields = ['batch', 'id', 'url', 'name', 'network', 'protocol', 'archive', 'blocked'])
|
|
{
|
|
// Fetch the relay contact
|
|
$condition = ['uid' => 0, 'gsid' => $gserver['id'], 'contact-type' => Contact::TYPE_RELAY];
|
|
$contact = DBA::selectFirst('contact', $fields, $condition);
|
|
if (DBA::isResult($contact)) {
|
|
if ($contact['archive'] || $contact['blocked']) {
|
|
return false;
|
|
}
|
|
return $contact;
|
|
} else {
|
|
self::updateContact($gserver);
|
|
|
|
$contact = DBA::selectFirst('contact', $fields, $condition);
|
|
if (DBA::isResult($contact)) {
|
|
return $contact;
|
|
}
|
|
}
|
|
|
|
// It should never happen that we arrive here
|
|
return [];
|
|
}
|
|
}
|