. * * @category Plugin * @package StatusNet * @author Evan Prodromou * @copyright 2009 StatusNet, Inc. * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 * @link http://status.net/ */ if (!defined('LACONICA')) { exit(1); } define('BLOGSPAMNETPLUGIN_VERSION', '0.1'); /** * Plugin to check submitted notices with blogspam.net * * When new notices are saved, we check their text with blogspam.net (or * a compatible service). * * Blogspam.net is supposed to catch blog comment spam, and I found that * some of its tests (min/max size, bayesian match) gave a lot of false positives. * So, I've turned those tests off by default. This may not get as many * hits, but it's better than nothing. * * @category Plugin * @package StatusNet * @author Evan Prodromou * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 * @link http://status.net/ * * @see Event */ class BlogspamNetPlugin extends Plugin { var $baseUrl = 'http://test.blogspam.net:8888/'; function __construct($url=null) { parent::__construct(); if ($url) { $this->baseUrl = $url; } } function onStartNoticeSave($notice) { $args = $this->testArgs($notice); common_debug("Blogspamnet args = " . print_r($args, TRUE)); $request = xmlrpc_encode_request('testComment', array($args)); $context = stream_context_create(array('http' => array('method' => "POST", 'header' => "Content-Type: text/xml\r\n". "User-Agent: " . $this->userAgent(), 'content' => $request))); $file = file_get_contents($this->baseUrl, false, $context); $response = xmlrpc_decode($file); if (xmlrpc_is_fault($response)) { throw new ServerException("$response[faultString] ($response[faultCode])", 500); } else { common_debug("Blogspamnet results = " . $response); if (preg_match('/^ERROR(:(.*))?$/', $response, $match)) { throw new ServerException(sprintf(_("Error from %s: %s"), $this->baseUrl, $match[2]), 500); } else if (preg_match('/^SPAM(:(.*))?$/', $response, $match)) { throw new ClientException(sprintf(_("Spam checker results: %s"), $match[2]), 400); } else if (preg_match('/^OK$/', $response)) { // don't do anything } else { throw new ServerException(sprintf(_("Unexpected response from %s: %s"), $this->baseUrl, $response), 500); } } return true; } function testArgs($notice) { $args = array(); $args['comment'] = $notice->content; $args['ip'] = $this->getClientIP(); if (isset($_SERVER) && array_key_exists('HTTP_USER_AGENT', $_SERVER)) { $args['agent'] = $_SERVER['HTTP_USER_AGENT']; } $profile = $notice->getProfile(); if ($profile && $profile->homepage) { $args['link'] = $profile->homepage; } if ($profile && $profile->fullname) { $args['name'] = $profile->fullname; } else { $args['name'] = $profile->nickname; } $args['site'] = common_root_url(); $args['version'] = $this->userAgent(); $args['options'] = "max-size=140,min-size=0,min-words=0,exclude=bayasian"; return $args; } function getClientIP() { if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) { // Note: order matters here; use proxy-forwarded stuff first foreach (array('HTTP_X_FORWARDED_FOR', 'CLIENT-IP', 'REMOTE_ADDR') as $k) { if (isset($_SERVER[$k])) { return $_SERVER[$k]; } } } return '127.0.0.1'; } function userAgent() { return 'BlogspamNetPlugin/'.BLOGSPAMNETPLUGIN_VERSION . ' StatusNet/' . LACONICA_VERSION; } }