79 lines
2.5 KiB
PHP
79 lines
2.5 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: 0.1
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* Author: Philipp Holzer <admin@philipp.info>
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*
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*/
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use Friendica\App;
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use Friendica\Core\Config;
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use Friendica\Core\Hook;
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use Friendica\Core\System;
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use Jaybizzle\CrawlerDetect\CrawlerDetect;
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use Friendica\Core\Logger;
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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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Hook::register('init_1', __FILE__, 'blockbot_init_1');
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}
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function blockbot_uninstall() {
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Hook::unregister('init_1', __FILE__, 'blockbot_init_1');
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}
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function blockbot_init_1(App $a) {
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if (empty($_SERVER['HTTP_USER_AGENT'])) {
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return;
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}
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$logdata = ['agent' => $_SERVER['HTTP_USER_AGENT'], 'uri' => $_SERVER['REQUEST_URI']];
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// List of known crawlers. They are added here to avoid having them logged at the end of the function.
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// This helps to detect false positives.
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$agents = ['SEMrushBot', 's~feedly-nikon3', 'Qwantify/Bleriot/', 'ltx71', 'Sogou web spider/',
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'Diffbot/', 'Twitterbot/', '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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'facebookexternalhit/', 'GoogleImageProxy', 'bingbot/', 'heritrix/', 'ldspider',
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'AwarioRssBot/', 'Zabbix'];
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foreach ($agents as $agent) {
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if (stristr($_SERVER['HTTP_USER_AGENT'], $agent)) {
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System::httpExit(403, 'Bots are not allowed');
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}
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}
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// This switch here is just meant for developers who want to add more bots to the list above
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if (!Config::get('blockbot', 'training')) {
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return;
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}
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$crawlerDetect = new CrawlerDetect();
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if (!$crawlerDetect->isCrawler()) {
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logger::debug('Good user agent detected', $logdata);
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return;
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}
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// List of false positives' strings of known "good" agents.
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$agents = ['fediverse.network crawler', 'Active_Pods_CheckBot_3.0', 'Social-Relay/',
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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;'];
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foreach ($agents as $agent) {
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if (stristr($_SERVER['HTTP_USER_AGENT'], $agent)) {
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logger::notice('False positive', $logdata);
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return;
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}
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}
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logger::info('Blocked bot', $logdata);
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System::httpExit(403, 'Bots are not allowed');
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}
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