<?php
/** * @package Akismet */
/* Plugin Name: Akismet Plugin URI: http://akismet.com/?return=true Description: Used by millions, Akismet is quite possibly the best way in the world to <strong>protect your blog from comment and trackback spam</strong>. It keeps your site protected from spam even while you sleep. To get started: 1) Click the "Activate" link to the left of this description, 2) <a href="http://akismet.com/get/?return=true">Sign up for an Akismet API key</a>, and 3) Go to your Akismet configuration page, and save your API key. Version: 2.5.9 Author: Automattic Author URI: http://automattic.com/wordpress-plugins/ License: GPLv2 or later */
/* This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
// Make sure we don't expose any info if called directly if ( !function_exists( 'add_action' ) ) { echo 'Hi there! I\'m just a plugin, not much I can do when called directly.'; exit; } define('AKISMET_VERSION', '2.5.9'); define('AKISMET_PLUGIN_URL', plugin_dir_url( __FILE__ )); /** If you hardcode a WP.com API key here, all key config screens will be hidden */ if ( defined('WPCOM_API_KEY') ) $wpcom_api_key = constant('WPCOM_API_KEY'); else $wpcom_api_key = ''; if ( isset($wp_db_version) && $wp_db_version <= 9872 ) include_once dirname( __FILE__ ) . '/legacy.php'; include_once dirname( __FILE__ ) . '/widget.php'; if ( is_admin() ) require_once dirname( __FILE__ ) . '/admin.php'; function akismet_init() { global $wpcom_api_key, $akismet_api_host, $akismet_api_port; if ( $wpcom_api_key ) $akismet_api_host = $wpcom_api_key . '.rest.akismet.com'; else $akismet_api_host = get_option('wordpress_api_key') . '.rest.akismet.com'; $akismet_api_port = 80; } add_action('init', 'akismet_init'); function akismet_get_key() { global $wpcom_api_key; if ( !empty($wpcom_api_key) ) return $wpcom_api_key; return get_option('wordpress_api_key'); } function akismet_check_key_status( $key, $ip = null ) { global $akismet_api_host, $akismet_api_port, $wpcom_api_key; $blog = urlencode( get_option('home') ); if ( $wpcom_api_key ) $key = $wpcom_api_key; $response = akismet_http_post("key=$key&blog=$blog", 'rest.akismet.com', '/1.1/verify-key', $akismet_api_port, $ip); return $response; } // given a response from an API call like akismet_check_key_status(), update the alert code options if an alert is present. function akismet_update_alert( $response ) { $code = $msg = null; if ( isset($response[0]['x-akismet-alert-code']) ) { $code = $response[0]['x-akismet-alert-code']; $msg = $response[0]['x-akismet-alert-msg']; } // only call update_option() if the value has changed if ( $code != get_option( 'akismet_alert_code' ) ) { update_option( 'akismet_alert_code', $code ); update_option( 'akismet_alert_msg', $msg ); } } function akismet_verify_key( $key, $ip = null ) { $response = akismet_check_key_status( $key, $ip ); akismet_update_alert( $response ); if ( !is_array($response) || !isset($response[1]) || $response[1] != 'valid' && $response[1] != 'invalid' ) return 'failed'; return $response[1]; } // if we're in debug or test modes, use a reduced service level so as not to polute training or stats data function akismet_test_mode() { if ( defined('AKISMET_TEST_MODE') && AKISMET_TEST_MODE ) return true; return false; } // return a comma-separated list of role names for the given user function akismet_get_user_roles( $user_id ) { $roles = false; if ( !class_exists('WP_User') ) return false; if ( $user_id > 0 ) { $comment_user = new WP_User($user_id); if ( isset($comment_user->roles) ) $roles = join(',', $comment_user->roles); } if ( is_multisite() && is_super_admin( $user_id ) ) { if ( empty( $roles ) ) { $roles = 'super_admin'; } else { $comment_user->roles[] = 'super_admin'; $roles = join( ',', $comment_user->roles ); } } return $roles; } // Returns array with headers in $response[0] and body in $response[1] function akismet_http_post($request, $host, $path, $port = 80, $ip=null) { global $wp_version; $akismet_ua = "WordPress/{$wp_version} | "; $akismet_ua .= 'Akismet/' . constant( 'AKISMET_VERSION' ); $akismet_ua = apply_filters( 'akismet_ua', $akismet_ua ); $content_length = strlen( $request ); $http_host = $host; // use a specific IP if provided // needed by akismet_check_server_connectivity() if ( $ip && long2ip( ip2long( $ip ) ) ) { $http_host = $ip; } else { $http_host = $host; } // use the WP HTTP class if it is available if ( function_exists( 'wp_remote_post' ) ) { $http_args = array( 'body' => $request, 'headers' => array( 'Content-Type' => 'application/x-www-form-urlencoded; ' . 'charset=' . get_option( 'blog_charset' ), 'Host' => $host, 'User-Agent' => $akismet_ua ), 'httpversion' => '1.0', 'timeout' => 15 ); $akismet_url = "http://{$http_host}{$path}"; $response = wp_remote_post( $akismet_url, $http_args ); if ( is_wp_error( $response ) ) return ''; return array( $response['headers'], $response['body'] ); } else { $http_request = "POST $path HTTP/1.0\r\n"; $http_request .= "Host: $host\r\n"; $http_request .= 'Content-Type: application/x-www-form-urlencoded; charset=' . get_option('blog_charset') . "\r\n"; $http_request .= "Content-Length: {$content_length}\r\n"; $http_request .= "User-Agent: {$akismet_ua}\r\n"; $http_request .= "\r\n"; $http_request .= $request; $response = ''; if( false != ( $fs = @fsockopen( $http_host, $port, $errno, $errstr, 10 ) ) ) { fwrite( $fs, $http_request ); while ( !feof( $fs ) ) $response .= fgets( $fs, 1160 ); // One TCP-IP packet fclose( $fs ); $response = explode( "\r\n\r\n", $response, 2 ); } return $response; } } // filter handler used to return a spam result to pre_comment_approved function akismet_result_spam( $approved ) { // bump the counter here instead of when the filter is added to reduce the possibility of overcounting if ( $incr = apply_filters('akismet_spam_count_incr', 1) ) update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr ); // this is a one-shot deal remove_filter( 'pre_comment_approved', 'akismet_result_spam' ); return 'spam'; } function akismet_result_hold( $approved ) { // once only remove_filter( 'pre_comment_approved', 'akismet_result_hold' ); return '0'; } // how many approved comments does this author have? function akismet_get_user_comments_approved( $user_id, $comment_author_email, $comment_author, $comment_author_url ) { global $wpdb; if ( !empty($user_id) ) return $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->comments WHERE user_id = %d AND comment_approved = 1", $user_id ) ); if ( !empty($comment_author_email) ) return $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_author_email = %s AND comment_author = %s AND comment_author_url = %s AND comment_approved = 1", $comment_author_email, $comment_author, $comment_author_url ) ); return 0; } function akismet_microtime() { $mtime = explode( ' ', microtime() ); return $mtime[1] + $mtime[0]; } // log an event for a given comment, storing it in comment_meta function akismet_update_comment_history( $comment_id, $message, $event=null ) { global $current_user; // failsafe for old WP versions if ( !function_exists('add_comment_meta') ) return false; $user = ''; if ( is_object($current_user) && isset($current_user->user_login) ) $user = $current_user->user_login; $event = array( 'time' => akismet_microtime(), 'message' => $message, 'event' => $event, 'user' => $user, ); // $unique = false so as to allow multiple values per comment $r = add_comment_meta( $comment_id, 'akismet_history', $event, false ); } // get the full comment history for a given comment, as an array in reverse chronological order function akismet_get_comment_history( $comment_id ) { // failsafe for old WP versions if ( !function_exists('add_comment_meta') ) return false; $history = get_comment_meta( $comment_id, 'akismet_history', false ); usort( $history, 'akismet_cmp_time' ); return $history; } function akismet_cmp_time( $a, $b ) { return $a['time'] > $b['time'] ? -1 : 1; } // this fires on wp_insert_comment. we can't update comment_meta when akismet_auto_check_comment() runs // because we don't know the comment ID at that point. function akismet_auto_check_update_meta( $id, $comment ) { global $akismet_last_comment; // failsafe for old WP versions if ( !function_exists('add_comment_meta') ) return false; if ( !isset( $akismet_last_comment['comment_author_email'] ) ) $akismet_last_comment['comment_author_email'] = ''; // wp_insert_comment() might be called in other contexts, so make sure this is the same comment // as was checked by akismet_auto_check_comment if ( is_object($comment) && !empty($akismet_last_comment) && is_array($akismet_last_comment) ) { if ( isset($akismet_last_comment['comment_post_ID']) && intval($akismet_last_comment['comment_post_ID']) == intval($comment->comment_post_ID) && $akismet_last_comment['comment_author'] == $comment->comment_author && $akismet_last_comment['comment_author_email'] == $comment->comment_author_email ) { // normal result: true or false if ( $akismet_last_comment['akismet_result'] == 'true' ) { update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' ); akismet_update_comment_history( $comment->comment_ID, __('Akismet caught this comment as spam'), 'check-spam' ); if ( $comment->comment_approved != 'spam' ) akismet_update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s'), $comment->comment_approved), 'status-changed'.$comment->comment_approved ); } elseif ( $akismet_last_comment['akismet_result'] == 'false' ) { update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' ); akismet_update_comment_history( $comment->comment_ID, __('Akismet cleared this comment'), 'check-ham' ); if ( $comment->comment_approved == 'spam' ) { if ( wp_blacklist_check($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent) ) akismet_update_comment_history( $comment->comment_ID, __('Comment was caught by wp_blacklist_check'), 'wp-blacklisted' ); else akismet_update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s'), $comment->comment_approved), 'status-changed-'.$comment->comment_approved ); } // abnormal result: error } else { update_comment_meta( $comment->comment_ID, 'akismet_error', time() ); akismet_update_comment_history( $comment->comment_ID, sprintf( __('Akismet was unable to check this comment (response: %s), will automatically retry again later.'), substr($akismet_last_comment['akismet_result'], 0, 50)), 'check-error' ); } // record the complete original data as submitted for checking if ( isset($akismet_last_comment['comment_as_submitted']) ) update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', $akismet_last_comment['comment_as_submitted'] ); } } } add_action( 'wp_insert_comment', 'akismet_auto_check_update_meta', 10, 2 ); function akismet_auto_check_comment( $commentdata ) { global $akismet_api_host, $akismet_api_port, $akismet_last_comment; $comment = $commentdata; $comment['user_ip'] = $_SERVER['REMOTE_ADDR']; $comment['user_agent'] = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : null; $comment['referrer'] = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : null; $comment['blog'] = get_option('home'); $comment['blog_lang'] = get_locale(); $comment['blog_charset'] = get_option('blog_charset'); $comment['permalink'] = get_permalink($comment['comment_post_ID']); if ( !empty( $comment['user_ID'] ) ) { $comment['user_role'] = akismet_get_user_roles( $comment['user_ID'] ); } $akismet_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) ); $comment['akismet_comment_nonce'] = 'inactive'; if ( $akismet_nonce_option == 'true' || $akismet_nonce_option == '' ) { $comment['akismet_comment_nonce'] = 'failed'; if ( isset( $_POST['akismet_comment_nonce'] ) && wp_verify_nonce( $_POST['akismet_comment_nonce'], 'akismet_comment_nonce_' . $comment['comment_post_ID'] ) ) $comment['akismet_comment_nonce'] = 'passed'; // comment reply in wp-admin if ( isset( $_POST['_ajax_nonce-replyto-comment'] ) && check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment' ) ) $comment['akismet_comment_nonce'] = 'passed'; } if ( akismet_test_mode() ) $comment['is_test'] = 'true'; foreach ($_POST as $key => $value ) { if ( is_string($value) ) $comment["POST_{$key}"] = $value; } $ignore = array( 'HTTP_COOKIE', 'HTTP_COOKIE2', 'PHP_AUTH_PW' ); foreach ( $_SERVER as $key => $value ) { if ( !in_array( $key, $ignore ) && is_string($value) ) $comment["$key"] = $value; else $comment["$key"] = ''; } $post = get_post( $comment['comment_post_ID'] ); $comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt; $query_string = ''; foreach ( $comment as $key => $data ) $query_string .= $key . '=' . urlencode( stripslashes($data) ) . '&'; $commentdata['comment_as_submitted'] = $comment; $response = akismet_http_post($query_string, $akismet_api_host, '/1.1/comment-check', $akismet_api_port); do_action( 'akismet_comment_check_response', $response ); akismet_update_alert( $response ); $commentdata['akismet_result'] = $response[1]; if ( 'true' == $response[1] ) { // akismet_spam_count will be incremented later by akismet_result_spam() add_filter('pre_comment_approved', 'akismet_result_spam'); do_action( 'akismet_spam_caught' ); $last_updated = strtotime( $post->post_modified_gmt ); $diff = time() - $last_updated; $diff = $diff / 86400; if ( $post->post_type == 'post' && $diff > 30 && get_option( 'akismet_discard_month' ) == 'true' && empty($comment['user_ID']) ) { // akismet_result_spam() won't be called so bump the counter here if ( $incr = apply_filters('akismet_spam_count_incr', 1) ) update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr ); $redirect_to = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : get_permalink( $post ); wp_safe_redirect( $redirect_to ); die(); } } // if the response is neither true nor false, hold the comment for moderation and schedule a recheck if ( 'true' != $response[1] && 'false' != $response[1] ) { if ( !current_user_can('moderate_comments') ) { add_filter('pre_comment_approved', 'akismet_result_hold'); } if ( !wp_next_scheduled( 'akismet_schedule_cron_recheck' ) ) { wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); } } if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_event') ) { // WP 2.1+: delete old comments daily if ( !wp_next_scheduled('akismet_scheduled_delete') ) wp_schedule_event(time(), 'daily', 'akismet_scheduled_delete'); } elseif ( (mt_rand(1, 10) == 3) ) { // WP 2.0: run this one time in ten akismet_delete_old(); } $akismet_last_comment = $commentdata; akismet_fix_scheduled_recheck(); return $commentdata; } add_action('preprocess_comment', 'akismet_auto_check_comment', 1); function akismet_delete_old() { global $wpdb; $now_gmt = current_time('mysql', 1); $comment_ids = $wpdb->get_col("SELECT comment_id FROM $wpdb->comments WHERE DATE_SUB('$now_gmt', INTERVAL 15 DAY) > comment_date_gmt AND comment_approved = 'spam'"); if ( empty( $comment_ids ) ) return; $comma_comment_ids = implode( ', ', array_map('intval', $comment_ids) ); do_action( 'delete_comment', $comment_ids ); $wpdb->query("DELETE FROM $wpdb->comments WHERE comment_id IN ( $comma_comment_ids )"); $wpdb->query("DELETE FROM $wpdb->commentmeta WHERE comment_id IN ( $comma_comment_ids )"); clean_comment_cache( $comment_ids ); $n = mt_rand(1, 5000); if ( apply_filters('akismet_optimize_table', ($n == 11)) ) // lucky number $wpdb->query("OPTIMIZE TABLE $wpdb->comments"); } function akismet_delete_old_metadata() { global $wpdb; $now_gmt = current_time( 'mysql', 1 ); $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 ); # enfore a minimum of 1 day $interval = absint( $interval ); if ( $interval < 1 ) { return; } // akismet_as_submitted meta values are large, so expire them // after $interval days regardless of the comment status while ( TRUE ) { $comment_ids = $wpdb->get_col( "SELECT $wpdb->comments.comment_id FROM $wpdb->commentmeta INNER JOIN $wpdb->comments USING(comment_id) WHERE meta_key = 'akismet_as_submitted' AND DATE_SUB('$now_gmt', INTERVAL {$interval} DAY) > comment_date_gmt LIMIT 10000" ); if ( empty( $comment_ids ) ) { return; } foreach ( $comment_ids as $comment_id ) { delete_comment_meta( $comment_id, 'akismet_as_submitted' ); } } /* $n = mt_rand( 1, 5000 ); if ( apply_filters( 'akismet_optimize_table', ( $n == 11 ), 'commentmeta' ) ) { // lucky number $wpdb->query( "OPTIMIZE TABLE $wpdb->commentmeta" ); } */ } add_action('akismet_scheduled_delete', 'akismet_delete_old'); add_action('akismet_scheduled_delete', 'akismet_delete_old_metadata'); function akismet_check_db_comment( $id, $recheck_reason = 'recheck_queue' ) { global $wpdb, $akismet_api_host, $akismet_api_port; $id = (int) $id; $c = $wpdb->get_row( "SELECT * FROM $wpdb->comments WHERE comment_ID = '$id'", ARRAY_A ); if ( !$c ) return; $c['user_ip'] = $c['comment_author_IP']; $c['user_agent'] = $c['comment_agent']; $c['referrer'] = ''; $c['blog'] = get_option('home'); $c['blog_lang'] = get_locale(); $c['blog_charset'] = get_option('blog_charset'); $c['permalink'] = get_permalink($c['comment_post_ID']); $id = $c['comment_ID']; if ( akismet_test_mode() ) $c['is_test'] = 'true'; $c['recheck_reason'] = $recheck_reason; $query_string = ''; foreach ( $c as $key => $data ) $query_string .= $key . '=' . urlencode( stripslashes($data) ) . '&'; $response = akismet_http_post($query_string, $akismet_api_host, '/1.1/comment-check', $akismet_api_port); return ( is_array( $response ) && isset( $response[1] ) ) ? $response[1] : false; } function akismet_cron_recheck() { global $wpdb; $status = akismet_verify_key( akismet_get_key() ); if ( get_option( 'akismet_alert_code' ) || $status == 'invalid' ) { // since there is currently a problem with the key, reschedule a check for 6 hours hence wp_schedule_single_event( time() + 21600, 'akismet_schedule_cron_recheck' ); return false; } delete_option('akismet_available_servers'); $comment_errors = $wpdb->get_col( " SELECT comment_id FROM {$wpdb->prefix}commentmeta WHERE meta_key = 'akismet_error' LIMIT 100 " ); foreach ( (array) $comment_errors as $comment_id ) { // if the comment no longer exists, or is too old, remove the meta entry from the queue to avoid getting stuck $comment = get_comment( $comment_id ); if ( !$comment || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) ) { delete_comment_meta( $comment_id, 'akismet_error' ); continue; } add_comment_meta( $comment_id, 'akismet_rechecking', true ); $status = akismet_check_db_comment( $comment_id, 'retry' ); $msg = ''; if ( $status == 'true' ) { $msg = __( 'Akismet caught this comment as spam during an automatic retry.' ); } elseif ( $status == 'false' ) { $msg = __( 'Akismet cleared this comment during an automatic retry.' ); } // If we got back a legit response then update the comment history // other wise just bail now and try again later. No point in // re-trying all the comments once we hit one failure. if ( !empty( $msg ) ) { delete_comment_meta( $comment_id, 'akismet_error' ); akismet_update_comment_history( $comment_id, $msg, 'cron-retry' ); update_comment_meta( $comment_id, 'akismet_result', $status ); // make sure the comment status is still pending. if it isn't, that means the user has already moved it elsewhere. $comment = get_comment( $comment_id ); if ( $comment && 'unapproved' == wp_get_comment_status( $comment_id ) ) { if ( $status == 'true' ) { wp_spam_comment( $comment_id ); } elseif ( $status == 'false' ) { // comment is good, but it's still in the pending queue. depending on the moderation settings // we may need to change it to approved. if ( check_comment($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent, $comment->comment_type) ) wp_set_comment_status( $comment_id, 1 ); } } } else { delete_comment_meta( $comment_id, 'akismet_rechecking' ); wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); return; } delete_comment_meta( $comment_id, 'akismet_rechecking' ); } $remaining = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->commentmeta WHERE meta_key = 'akismet_error'" ); if ( $remaining && !wp_next_scheduled('akismet_schedule_cron_recheck') ) { wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); } } add_action( 'akismet_schedule_cron_recheck', 'akismet_cron_recheck' ); function akismet_add_comment_nonce( $post_id ) { echo '<p style="display: none;">'; wp_nonce_field( 'akismet_comment_nonce_' . $post_id, 'akismet_comment_nonce', FALSE ); echo '</p>'; } $akismet_comment_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) ); if ( $akismet_comment_nonce_option == 'true' || $akismet_comment_nonce_option == '' ) add_action( 'comment_form', 'akismet_add_comment_nonce' ); global $wp_version; if ( '3.0.5' == $wp_version ) { remove_filter( 'comment_text', 'wp_kses_data' ); if ( is_admin() ) add_filter( 'comment_text', 'wp_kses_post' ); } function akismet_fix_scheduled_recheck() { $future_check = wp_next_scheduled( 'akismet_schedule_cron_recheck' ); if ( !$future_check ) { return; } if ( get_option( 'akismet_alert_code' ) > 0 ) { return; } $check_range = time() + 1200; if ( $future_check > $check_range ) { wp_clear_scheduled_hook( 'akismet_schedule_cron_recheck' ); wp_schedule_single_event( time() + 300, 'akismet_schedule_cron_recheck' ); } }
