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Compare lengths of hashtags with the content length for improved spam detection

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This commit is contained in:
Michael 2024-01-26 11:22:01 +00:00
parent efe1ea5c3c
commit b8f80a8d25
2 changed files with 10 additions and 5 deletions
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13
src/Protocol/Relay.php
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@ -113,13 +113,18 @@ class Relay
}
if (!empty($tagList) || !empty($denyTags)) {
$content = mb_strtolower(BBCode::toPlaintext($body, false));
$max_tags = $config->get('system', 'relay_max_tags');
if ($max_tags && (count($tags) > $max_tags) && preg_match('/[^@!#]\[url\=.*?\].*?\[\/url\]/ism', $body)) {
Logger::info('Possible hashtag spam detected - rejected', ['hashtags' => $tags, 'network' => $network, 'url' => $url, 'causer' => $causer, 'body' => $body]);
return false;
}
$cleaned = preg_replace('/[@!#]\[url\=.*?\].*?\[\/url\]/ism', '', $body);
$content_cleaned = mb_strtolower(BBCode::toPlaintext($cleaned, false));
$content = mb_strtolower(BBCode::toPlaintext($body, false));
if (strlen($content_cleaned) < (strlen($content) - strlen($content_cleaned))) {
Logger::info('Possible hashtag spam detected - rejected', ['hashtags' => $tags, 'network' => $network, 'url' => $url, 'causer' => $causer, 'body' => $body]);
return false;
}
}
foreach ($tags as $tag) {
$tag = mb_strtolower($tag);

2
static/settings.config.php
View file

@ -239,7 +239,7 @@ return [
// relay_max_tags (Integer)
// Maximum amount of tags in a post before it is rejected as spam.
'relay_max_tags' => 10,
'relay_max_tags' => 20,
// proxify_content (Boolean)
// Use the proxy functionality for fetching external content