72 lines
2.2 KiB
PHP
72 lines
2.2 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\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 $a) {
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$crawlerDetect = new CrawlerDetect();
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$logdata = ['agent' => $_SERVER['HTTP_USER_AGENT'], 'uri' => $_SERVER['REQUEST_URI']];
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if (!$crawlerDetect->isCrawler()) {
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logger::debug('Good user agent detected', $logdata);
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return;
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}
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// List of strings of reported false positives
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$agents = ['hackney/', 'Faraday v', 'okhttp', 'UniversalFeedParser', 'PixelFedBot', 'python-requests',
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'WordPress/', 'http.rb/'];
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foreach ($agents as $agent) {
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if (stristr($_SERVER['HTTP_USER_AGENT'], $agent)) {
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// The agents had been reported to https://github.com/JayBizzle/Crawler-Detect/issues/
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logger::notice('Reported false positive', $logdata);
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return;
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}
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}
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// List of false positives' strings of known "good" agents we haven't reported (yet)
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$agents = ['fediverse.network crawler', 'Active_Pods_CheckBot_3.0', 'Social-Relay/',
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'curl', 'zgrab', 'Go-http-client', 'curb'];
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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('Unreported falsely detected agent', $logdata);
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return;
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}
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}
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// List of known crawlers. They are added here to avoid having them logged at the end of the function.
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// This helps to detect false positives.
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$agents = ['SEMrushBot', 's~feedly-nikon3', 'Qwantify/Bleriot/', 'ltx71', 'Sogou web spider/',
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'Diffbot/'];
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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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logger::info('Blocked bot', $logdata);
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System::httpExit(403, 'Bots are not allowed');
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}
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