447 lines
14 KiB
PHP
447 lines
14 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Model;
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use Friendica\Content\Text\HTML;
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use Friendica\Core\Cache\Duration;
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use Friendica\Core\Logger;
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use Friendica\Core\System;
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use Friendica\Database\DBA;
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use Friendica\Database\DBStructure;
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use Friendica\DI;
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use Friendica\Network\Probe;
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use Friendica\Protocol\ActivityNamespace;
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use Friendica\Protocol\ActivityPub;
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use Friendica\Util\Crypto;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\HTTPSignature;
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use Friendica\Util\JsonLD;
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use Friendica\Util\Network;
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class APContact
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{
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/**
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* Fetch webfinger data
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*
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* @param string $addr Address
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* @return array webfinger data
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*/
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private static function fetchWebfingerData(string $addr)
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{
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$addr_parts = explode('@', $addr);
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if (count($addr_parts) != 2) {
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return [];
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}
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$data = ['addr' => $addr];
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$template = 'https://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr);
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$webfinger = Probe::webfinger(str_replace('{uri}', urlencode($addr), $template), 'application/jrd+json');
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if (empty($webfinger['links'])) {
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$template = 'http://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr);
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$webfinger = Probe::webfinger(str_replace('{uri}', urlencode($addr), $template), 'application/jrd+json');
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if (empty($webfinger['links'])) {
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return [];
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}
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$data['baseurl'] = 'http://' . $addr_parts[1];
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} else {
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$data['baseurl'] = 'https://' . $addr_parts[1];
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}
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foreach ($webfinger['links'] as $link) {
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if (empty($link['rel'])) {
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continue;
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}
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if (!empty($link['template']) && ($link['rel'] == ActivityNamespace::OSTATUSSUB)) {
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$data['subscribe'] = $link['template'];
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}
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if (!empty($link['href']) && !empty($link['type']) && ($link['rel'] == 'self') && ($link['type'] == 'application/activity+json')) {
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$data['url'] = $link['href'];
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}
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if (!empty($link['href']) && !empty($link['type']) && ($link['rel'] == 'http://webfinger.net/rel/profile-page') && ($link['type'] == 'text/html')) {
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$data['alias'] = $link['href'];
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}
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}
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if (!empty($data['url']) && !empty($data['alias']) && ($data['url'] == $data['alias'])) {
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unset($data['alias']);
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}
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return $data;
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}
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/**
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* Fetches a profile from a given url
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*
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* @param string $url profile url
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* @param boolean $update true = always update, false = never update, null = update when not found or outdated
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* @return array profile array
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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* @throws \ImagickException
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*/
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public static function getByURL($url, $update = null)
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{
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if (empty($url)) {
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return [];
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}
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$fetched_contact = false;
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if (empty($update)) {
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if (is_null($update)) {
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$ref_update = DateTimeFormat::utc('now - 1 month');
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} else {
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$ref_update = DBA::NULL_DATETIME;
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}
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$apcontact = DBA::selectFirst('apcontact', [], ['url' => $url]);
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if (!DBA::isResult($apcontact)) {
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$apcontact = DBA::selectFirst('apcontact', [], ['alias' => $url]);
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}
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if (!DBA::isResult($apcontact)) {
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$apcontact = DBA::selectFirst('apcontact', [], ['addr' => $url]);
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}
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if (DBA::isResult($apcontact) && ($apcontact['updated'] > $ref_update) && !empty($apcontact['pubkey']) && !empty($apcontact['uri-id'])) {
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return $apcontact;
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}
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if (!is_null($update)) {
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return DBA::isResult($apcontact) ? $apcontact : [];
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}
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if (DBA::isResult($apcontact)) {
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$fetched_contact = $apcontact;
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}
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}
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$apcontact = [];
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$webfinger = empty(parse_url($url, PHP_URL_SCHEME));
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if ($webfinger) {
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$apcontact = self::fetchWebfingerData($url);
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if (empty($apcontact['url'])) {
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return $fetched_contact;
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}
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$url = $apcontact['url'];
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}
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$curlResult = HTTPSignature::fetchRaw($url);
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$failed = empty($curlResult) || empty($curlResult->getBody()) ||
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(!$curlResult->isSuccess() && ($curlResult->getReturnCode() != 410));
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if (!$failed) {
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$data = json_decode($curlResult->getBody(), true);
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$failed = empty($data) || !is_array($data);
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}
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if (!$failed && ($curlResult->getReturnCode() == 410)) {
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$data = ['@context' => ActivityPub::CONTEXT, 'id' => $url, 'type' => 'Tombstone'];
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}
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if ($failed) {
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self::markForArchival($fetched_contact ?: []);
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return $fetched_contact;
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}
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$compacted = JsonLD::compact($data);
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if (empty($compacted['@id'])) {
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return $fetched_contact;
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}
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// Detect multiple fast repeating request to the same address
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// See https://github.com/friendica/friendica/issues/9303
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$cachekey = 'apcontact:getByURL:' . $url;
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$result = DI::cache()->get($cachekey);
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if (!is_null($result)) {
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Logger::notice('Multiple requests for the address', ['url' => $url, 'update' => $update, 'callstack' => System::callstack(20), 'result' => $result]);
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} else {
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DI::cache()->set($cachekey, System::callstack(20), Duration::FIVE_MINUTES);
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}
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$apcontact['url'] = $compacted['@id'];
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$apcontact['uuid'] = JsonLD::fetchElement($compacted, 'diaspora:guid', '@value');
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$apcontact['type'] = str_replace('as:', '', JsonLD::fetchElement($compacted, '@type'));
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$apcontact['following'] = JsonLD::fetchElement($compacted, 'as:following', '@id');
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$apcontact['followers'] = JsonLD::fetchElement($compacted, 'as:followers', '@id');
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$apcontact['inbox'] = JsonLD::fetchElement($compacted, 'ldp:inbox', '@id');
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self::unarchiveInbox($apcontact['inbox'], false);
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$apcontact['outbox'] = JsonLD::fetchElement($compacted, 'as:outbox', '@id');
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$apcontact['sharedinbox'] = '';
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if (!empty($compacted['as:endpoints'])) {
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$apcontact['sharedinbox'] = JsonLD::fetchElement($compacted['as:endpoints'], 'as:sharedInbox', '@id');
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self::unarchiveInbox($apcontact['sharedinbox'], true);
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}
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$apcontact['nick'] = JsonLD::fetchElement($compacted, 'as:preferredUsername', '@value') ?? '';
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$apcontact['name'] = JsonLD::fetchElement($compacted, 'as:name', '@value');
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if (empty($apcontact['name'])) {
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$apcontact['name'] = $apcontact['nick'];
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}
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$apcontact['about'] = HTML::toBBCode(JsonLD::fetchElement($compacted, 'as:summary', '@value'));
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$apcontact['photo'] = JsonLD::fetchElement($compacted, 'as:icon', '@id');
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if (is_array($apcontact['photo']) || !empty($compacted['as:icon']['as:url']['@id'])) {
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$apcontact['photo'] = JsonLD::fetchElement($compacted['as:icon'], 'as:url', '@id');
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}
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$apcontact['header'] = JsonLD::fetchElement($compacted, 'as:image', '@id');
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if (is_array($apcontact['header']) || !empty($compacted['as:image']['as:url']['@id'])) {
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$apcontact['header'] = JsonLD::fetchElement($compacted['as:image'], 'as:url', '@id');
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}
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if (empty($apcontact['alias'])) {
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$apcontact['alias'] = JsonLD::fetchElement($compacted, 'as:url', '@id');
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if (is_array($apcontact['alias'])) {
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$apcontact['alias'] = JsonLD::fetchElement($compacted['as:url'], 'as:href', '@id');
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}
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}
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// Quit if none of the basic values are set
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if (empty($apcontact['url']) || empty($apcontact['type']) || (($apcontact['type'] != 'Tombstone') && empty($apcontact['inbox']))) {
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return $fetched_contact;
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} elseif ($apcontact['type'] == 'Tombstone') {
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// The "inbox" field must have a content
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$apcontact['inbox'] = '';
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}
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// Quit if this doesn't seem to be an account at all
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if (!in_array($apcontact['type'], ActivityPub::ACCOUNT_TYPES)) {
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return $fetched_contact;
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}
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$parts = parse_url($apcontact['url']);
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unset($parts['scheme']);
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unset($parts['path']);
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if (empty($apcontact['addr'])) {
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if (!empty($apcontact['nick']) && is_array($parts)) {
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$apcontact['addr'] = $apcontact['nick'] . '@' . str_replace('//', '', Network::unparseURL($parts));
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} else {
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$apcontact['addr'] = '';
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}
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}
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$apcontact['pubkey'] = null;
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if (!empty($compacted['w3id:publicKey'])) {
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$apcontact['pubkey'] = trim(JsonLD::fetchElement($compacted['w3id:publicKey'], 'w3id:publicKeyPem', '@value'));
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if (strstr($apcontact['pubkey'], 'RSA ')) {
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$apcontact['pubkey'] = Crypto::rsaToPem($apcontact['pubkey']);
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}
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}
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$apcontact['manually-approve'] = (int)JsonLD::fetchElement($compacted, 'as:manuallyApprovesFollowers');
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if (!empty($compacted['as:generator'])) {
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$apcontact['baseurl'] = JsonLD::fetchElement($compacted['as:generator'], 'as:url', '@id');
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$apcontact['generator'] = JsonLD::fetchElement($compacted['as:generator'], 'as:name', '@value');
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}
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if (!empty($apcontact['following'])) {
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$following = ActivityPub::fetchContent($apcontact['following']);
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if (!empty($following['totalItems'])) {
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// Mastodon seriously allows for this condition?
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// Jul 14 2021 - See https://mastodon.social/@BLUW for a negative following count
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if ($following['totalItems'] < 0) {
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$following['totalItems'] = 0;
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}
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$apcontact['following_count'] = $following['totalItems'];
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}
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}
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if (!empty($apcontact['followers'])) {
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$followers = ActivityPub::fetchContent($apcontact['followers']);
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if (!empty($followers['totalItems'])) {
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// Mastodon seriously allows for this condition?
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// Jul 14 2021 - See https://mastodon.online/@goes11 for a negative followers count
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if ($followers['totalItems'] < 0) {
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$followers['totalItems'] = 0;
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}
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$apcontact['followers_count'] = $followers['totalItems'];
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}
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}
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if (!empty($apcontact['outbox'])) {
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$outbox = ActivityPub::fetchContent($apcontact['outbox']);
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if (!empty($outbox['totalItems'])) {
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$apcontact['statuses_count'] = $outbox['totalItems'];
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}
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}
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$apcontact['discoverable'] = JsonLD::fetchElement($compacted, 'toot:discoverable', '@value');
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// To-Do
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// Unhandled
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// tag, attachment, image, nomadicLocations, signature, featured, movedTo, liked
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// Unhandled from Misskey
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// sharedInbox, isCat
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// Unhandled from Kroeg
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// kroeg:blocks, updated
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// When the photo is too large, try to shorten it by removing parts
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if (strlen($apcontact['photo']) > 255) {
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$parts = parse_url($apcontact['photo']);
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unset($parts['fragment']);
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$apcontact['photo'] = Network::unparseURL($parts);
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if (strlen($apcontact['photo']) > 255) {
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unset($parts['query']);
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$apcontact['photo'] = Network::unparseURL($parts);
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}
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if (strlen($apcontact['photo']) > 255) {
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$apcontact['photo'] = substr($apcontact['photo'], 0, 255);
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}
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}
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if (!$webfinger && !empty($apcontact['addr'])) {
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$data = self::fetchWebfingerData($apcontact['addr']);
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if (!empty($data)) {
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$apcontact['baseurl'] = $data['baseurl'];
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if (empty($apcontact['alias']) && !empty($data['alias'])) {
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$apcontact['alias'] = $data['alias'];
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}
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if (!empty($data['subscribe'])) {
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$apcontact['subscribe'] = $data['subscribe'];
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}
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} else {
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$apcontact['addr'] = null;
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}
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}
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if (empty($apcontact['baseurl'])) {
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$apcontact['baseurl'] = null;
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}
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if (empty($apcontact['subscribe'])) {
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$apcontact['subscribe'] = null;
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}
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if (!empty($apcontact['baseurl']) && empty($fetched_contact['gsid'])) {
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$apcontact['gsid'] = GServer::getID($apcontact['baseurl']);
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} elseif (!empty($fetched_contact['gsid'])) {
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$apcontact['gsid'] = $fetched_contact['gsid'];
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} else {
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$apcontact['gsid'] = null;
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}
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if ($apcontact['url'] == $apcontact['alias']) {
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$apcontact['alias'] = null;
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}
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if (empty($apcontact['uuid'])) {
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$apcontact['uri-id'] = ItemURI::getIdByURI($apcontact['url']);
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} else {
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$apcontact['uri-id'] = ItemURI::insert(['uri' => $apcontact['url'], 'guid' => $apcontact['uuid']]);
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}
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$apcontact['updated'] = DateTimeFormat::utcNow();
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// We delete the old entry when the URL is changed
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if ($url != $apcontact['url']) {
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Logger::info('Delete changed profile url', ['old' => $url, 'new' => $apcontact['url']]);
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DBA::delete('apcontact', ['url' => $url]);
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}
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// Limit the length on incoming fields
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$apcontact = DBStructure::getFieldsForTable('apcontact', $apcontact);
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if (DBA::exists('apcontact', ['url' => $apcontact['url']])) {
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DBA::update('apcontact', $apcontact, ['url' => $apcontact['url']]);
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} else {
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DBA::replace('apcontact', $apcontact);
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}
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Logger::info('Updated profile', ['url' => $url]);
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return DBA::selectFirst('apcontact', [], ['url' => $apcontact['url']]) ?: [];
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}
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/**
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* Mark the given AP Contact as "to archive"
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*
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* @param array $apcontact
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* @return void
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*/
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public static function markForArchival(array $apcontact)
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{
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if (!empty($apcontact['inbox'])) {
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Logger::info('Set inbox status to failure', ['inbox' => $apcontact['inbox']]);
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HTTPSignature::setInboxStatus($apcontact['inbox'], false);
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}
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if (!empty($apcontact['sharedinbox'])) {
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// Check if there are any available inboxes
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$available = DBA::exists('apcontact', ["`sharedinbox` = ? AnD `inbox` IN (SELECT `url` FROM `inbox-status` WHERE `success` > `failure`)",
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$apcontact['sharedinbox']]);
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if (!$available) {
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// If all known personal inboxes are failing then set their shared inbox to failure as well
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Logger::info('Set shared inbox status to failure', ['sharedinbox' => $apcontact['sharedinbox']]);
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HTTPSignature::setInboxStatus($apcontact['sharedinbox'], false, true);
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}
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}
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}
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/**
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* Unmark the given AP Contact as "to archive"
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*
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* @param array $apcontact
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* @return void
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*/
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public static function unmarkForArchival(array $apcontact)
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{
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if (!empty($apcontact['inbox'])) {
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Logger::info('Set inbox status to success', ['inbox' => $apcontact['inbox']]);
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HTTPSignature::setInboxStatus($apcontact['inbox'], true);
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}
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if (!empty($apcontact['sharedinbox'])) {
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Logger::info('Set shared inbox status to success', ['sharedinbox' => $apcontact['sharedinbox']]);
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HTTPSignature::setInboxStatus($apcontact['sharedinbox'], true, true);
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}
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}
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/**
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* Unarchive inboxes
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*
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* @param string $url inbox url
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* @param boolean $shared Shared Inbox
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*/
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private static function unarchiveInbox($url, $shared)
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{
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if (empty($url)) {
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return;
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}
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HTTPSignature::setInboxStatus($url, true, $shared);
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}
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}
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