170 lines
8.0 KiB
PHP
170 lines
8.0 KiB
PHP
<?php
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/**
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* Name: blockbot
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* Description: Blocking bots based on detecting bots/crawlers/spiders via the user agent and http_from header.
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* Version: 0.2
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* Author: Philipp Holzer <admin@philipp.info>
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* Author: Michael Vogel <https://pirati.ca/profile/heluecht>
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*
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*/
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use Friendica\Core\Hook;
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use Friendica\DI;
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use Jaybizzle\CrawlerDetect\CrawlerDetect;
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use Friendica\Core\Logger;
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use Friendica\Core\Renderer;
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use Friendica\Network\HTTPException\ForbiddenException;
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require_once __DIR__ . DIRECTORY_SEPARATOR . 'vendor' . DIRECTORY_SEPARATOR . 'autoload.php';
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function blockbot_install()
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{
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Hook::register('init_1', __FILE__, 'blockbot_init_1');
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}
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function blockbot_addon_admin(string &$o)
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{
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$t = Renderer::getMarkupTemplate('admin.tpl', 'addon/blockbot/');
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$o = Renderer::replaceMacros($t, [
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'$submit' => DI::l10n()->t('Save Settings'),
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'$good_crawlers' => ['good_crawlers', DI::l10n()->t('Allow "good" crawlers'), DI::config()->get('blockbot', 'good_crawlers'), DI::l10n()->t("Don't block fediverse crawlers, relay servers and other bots with good purposes.")],
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'$socialmedia_agents' => ['socialmedia_agents', DI::l10n()->t('Allow preview agents'), DI::config()->get('blockbot', 'socialmedia_agents'), DI::l10n()->t("Don't block agents from social media systems that want to generate preview data for links that had been set by their users.")],
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'$http_libraries' => ['http_libraries', DI::l10n()->t('Allow generic HTTP libraries'), DI::config()->get('blockbot', 'http_libraries'), DI::l10n()->t("Don't block agents from generic HTTP libraries that could be used for good or for bad and that currently can't be traced back to any known Fediverse project.")],
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'$block_gab' => ['block_gab', DI::l10n()->t('Block GabSocial'), DI::config()->get('blockbot', 'block_gab'), DI::l10n()->t('Block the software GabSocial. This will block every access for that software. You can block dedicated gab instances in the blocklist settings in the admin section.')],
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'$training' => ['training', DI::l10n()->t('Training mode'), DI::config()->get('blockbot', 'training'), DI::l10n()->t("Activates the training mode. This is only meant for developing purposes. Don't activate this on a production machine. This can cut communication with some systems.")],
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]);
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}
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function blockbot_addon_admin_post()
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{
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DI::config()->set('blockbot', 'good_crawlers', $_POST['good_crawlers'] ?? false);
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DI::config()->set('blockbot', 'socialmedia_agents', $_POST['socialmedia_agents'] ?? false);
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DI::config()->set('blockbot', 'http_libraries', $_POST['http_libraries'] ?? false);
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DI::config()->set('blockbot', 'block_gab', $_POST['block_gab'] ?? false);
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DI::config()->set('blockbot', 'training', $_POST['training'] ?? false);
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}
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function blockbot_init_1()
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{
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if (empty($_SERVER['HTTP_USER_AGENT'])) {
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return;
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}
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$logdata = ['agent' => $_SERVER['HTTP_USER_AGENT'], 'uri' => $_SERVER['REQUEST_URI']];
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// List of known unwanted crawlers.
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$agents = [
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'SemrushBot', 's~feedly-nikon3', 'Qwantify/Bleriot/', 'ltx71', 'Sogou web spider/',
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'Diffbot/', 'YisouSpider', 'evc-batch/', 'LivelapBot/', 'TrendsmapResolver/',
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'PaperLiBot/', 'Nuzzel', 'um-LN/', 'Google Favicon', 'Datanyze', 'BLEXBot/', '360Spider',
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'adscanner/', 'HeadlessChrome', 'wpif', 'startmebot/', 'Googlebot/', 'Applebot/',
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'GoogleImageProxy', 'bingbot/', 'heritrix/', 'ldspider',
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'AwarioRssBot/', 'TweetmemeBot/', 'dcrawl/', 'PhantomJS/', 'Googlebot-Image/',
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'CrowdTanglebot/', 'Mediapartners-Google', 'Baiduspider/', 'datagnionbot',
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'MegaIndex.ru/', 'SMUrlExpander', 'Hatena-Favicon/', 'Wappalyzer', 'FlipboardProxy/',
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'NetcraftSurveyAgent/', 'Dataprovider.com', 'SMTBot/', 'Nimbostratus-Bot/',
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'DuckDuckGo-Favicons-Bot/', 'IndieWebCards/', 'proximic', 'netEstate NE Crawler',
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'AhrefsBot/', 'YandexBot/', 'Exabot/', 'Mediumbot-MetaTagFetcher/',
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'SurdotlyBot/', 'BingPreview/', 'SabsimBot/', 'CCBot/', 'WbSrch/',
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'DuckDuckBot-Https/', 'HTTP Banner Detection', 'YandexImages/', 'archive.org_bot',
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'ArchiveTeam ArchiveBot/', 'yacybot', 'https://developers.google.com/+/web/snippet/',
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'Scrapy/', 'MJ12bot/', 'DotBot/', 'Pinterestbot/', 'Jooblebot/',
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'Cliqzbot/', 'YaK/', 'Mediatoolkitbot', 'Snacktory', 'FunWebProducts', 'oBot/',
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'7Siters/', 'KOCMOHABT', 'Google-SearchByImage', 'FemtosearchBot/',
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'HubSpot Crawler', 'DomainStatsBot/', 'Re-re Studio', 'AwarioSmartBot/',
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'DNSResearchBot/', 'PetalBot;', 'Nmap Scripting Engine;',
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'Google-Apps-Script; beanserver;', 'woorankreview/', 'Seekport Crawler;', 'AHC/',
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'Semanticbot/', 'XoviOnpageCrawler;', 'Pinterest/',
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'GetHPinfo.com-Bot/', 'BoardReader Favicon Fetcher', 'Google-Adwords-Instant', 'newspaper/',
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'YurichevBot/', 'Crawling at Home Project', 'InfoTigerBot/', 'AdIdxBot/',
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'MicrosoftPreview/', 'masscan/', 'Timpibot/', 'everyfeed-spider/', 'AndroidDownloadManager/',
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'WebZIP/', 'WDG_Validator/', 'Screaming Frog SEO Spider/', ' Bytespider;', 'ISSCyberRiskCrawler/',
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];
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if (DI::config()->get('blockbot', 'block_gab')) {
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$agents[] = 'GabSocial/';
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}
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// List of "good" crawlers, mostly from the fediverse.
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$good_agents = [
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'fediverse.space crawler', 'fediverse.network crawler', 'Active_Pods_CheckBot_3.0',
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'Social-Relay/', 'Test Certificate Info', 'Uptimebot/', 'GNUSocialBot', 'UptimeRobot/',
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'PTST/', 'Zabbix', 'Poduptime/', 'FediFetcher', 'lemmy-stats-crawler',
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'FedditLemmyverseCrawler/', 'kbinBot/', 'lemmy-explorer-crawler/',
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];
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if (!DI::config()->get('blockbot', 'good_crawlers')) {
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$agents = array_merge($agents, $good_agents);
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} elseif (blockbot_match($good_agents)) {
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return;
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}
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// List of agents from social media systems that fetch preview data via opem graph or twitter cards.
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$socialmedia_agents = ['Twitterbot', 'facebookexternalhit/', 'SkypeUriPreview Preview/',
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'TelegramBot', 'WhatsApp/', 'github-camo', 'Bluesky Cardyb/', 'XING-contenttabreceiver/',
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'LinkedInBot/', 'Instagram ', 'Synapse (bot; ', 'Discordbot/', 'SummalyBot/'];
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if (!DI::config()->get('blockbot', 'socialmedia_agents')) {
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$agents = array_merge($agents, $socialmedia_agents);
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} elseif (blockbot_match($socialmedia_agents)) {
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return;
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}
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// HTTP Libraries
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$http_libraries = ['ReactorNetty/', 'GuzzleHttp/', 'Embed PHP library', 'python-urllib3/'];
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if (!DI::config()->get('blockbot', 'http_libraries')) {
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$agents = array_merge($agents, $http_libraries);
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} elseif (blockbot_match($http_libraries)) {
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return;
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}
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if (blockbot_match($agents)) {
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throw new ForbiddenException('Bots are not allowed. If you consider this a mistake, create an issue at https://github.com/friendica/friendica');
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}
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// This switch here is only meant for developers who want to add more bots to the list above, it is not safe for production.
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if (!DI::config()->get('blockbot', 'training')) {
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return;
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}
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$crawlerDetect = new CrawlerDetect();
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if (!$crawlerDetect->isCrawler()) {
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logger::debug('Good user agent detected', $logdata);
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return;
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}
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// List of known "good" agents, mostly used by Fediverse systems, feed readers, ...
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$agents = [
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'curl', 'zgrab', 'Go-http-client', 'curb', 'github.com', 'reqwest', 'Feedly/',
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'Python-urllib/', 'Liferea/', 'aiohttp/', 'WordPress.com Reader', 'hackney/',
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'Faraday v', 'okhttp', 'UniversalFeedParser', 'PixelFedBot', 'python-requests',
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'WordPress/', 'http.rb/', 'Apache-HttpClient/', 'WordPress.com;', 'Pleroma',
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'Dispatch/', 'Ruby', 'Java/', 'libwww-perl/', 'Mastodon/', 'FeedlyApp/',
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'lua-resty-http/', 'Tiny Tiny RSS/', 'Wget/', 'PostmanRuntime/',
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'W3C_Validator/', 'NetNewsWire', 'FeedValidator/', 'theoldreader.com', 'axios/',
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'Paw/', 'PeerTube/', 'fedi.inex.dev', 'FediDB/', 'index.community crawler',
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'Slackbot-LinkExpanding', 'Firefish/', 'Takahe/', 'Akkoma ', 'Misskey/', 'Lynx/',
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'camo-rs asset proxy',
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];
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if (blockbot_match($agents)) {
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logger::info('False positive', $logdata);
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return;
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}
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logger::notice('Blocked bot', $logdata);
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throw new ForbiddenException('Bots are not allowed. If you consider this a mistake, create an issue at https://github.com/friendica/friendica');
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}
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function blockbot_match(array $agents)
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{
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foreach ($agents as $agent) {
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if (stristr($_SERVER['HTTP_USER_AGENT'], $agent)) {
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return true;
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}
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}
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return false;
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} |