diff options
Diffstat (limited to 'wp-content/plugins/akismet/class.akismet.php')
| -rw-r--r-- | wp-content/plugins/akismet/class.akismet.php | 1874 |
1 files changed, 1874 insertions, 0 deletions
diff --git a/wp-content/plugins/akismet/class.akismet.php b/wp-content/plugins/akismet/class.akismet.php new file mode 100644 index 0000000..951142e --- /dev/null +++ b/wp-content/plugins/akismet/class.akismet.php @@ -0,0 +1,1874 @@ +<?php + +class Akismet { + const API_HOST = 'rest.akismet.com'; + const API_PORT = 80; + const MAX_DELAY_BEFORE_MODERATION_EMAIL = 86400; // One day in seconds + + public static $limit_notices = array( + 10501 => 'FIRST_MONTH_OVER_LIMIT', + 10502 => 'SECOND_MONTH_OVER_LIMIT', + 10504 => 'THIRD_MONTH_APPROACHING_LIMIT', + 10508 => 'THIRD_MONTH_OVER_LIMIT', + 10516 => 'FOUR_PLUS_MONTHS_OVER_LIMIT', + ); + + private static $last_comment = ''; + private static $initiated = false; + private static $prevent_moderation_email_for_these_comments = array(); + private static $last_comment_result = null; + private static $comment_as_submitted_allowed_keys = array( 'blog' => '', 'blog_charset' => '', 'blog_lang' => '', 'blog_ua' => '', 'comment_agent' => '', 'comment_author' => '', 'comment_author_IP' => '', 'comment_author_email' => '', 'comment_author_url' => '', 'comment_content' => '', 'comment_date_gmt' => '', 'comment_tags' => '', 'comment_type' => '', 'guid' => '', 'is_test' => '', 'permalink' => '', 'reporter' => '', 'site_domain' => '', 'submit_referer' => '', 'submit_uri' => '', 'user_ID' => '', 'user_agent' => '', 'user_id' => '', 'user_ip' => '' ); + + public static function init() { + if ( ! self::$initiated ) { + self::init_hooks(); + } + } + + /** + * Initializes WordPress hooks + */ + private static function init_hooks() { + self::$initiated = true; + + add_action( 'wp_insert_comment', array( 'Akismet', 'auto_check_update_meta' ), 10, 2 ); + add_filter( 'preprocess_comment', array( 'Akismet', 'auto_check_comment' ), 1 ); + add_filter( 'rest_pre_insert_comment', array( 'Akismet', 'rest_auto_check_comment' ), 1 ); + + add_action( 'comment_form', array( 'Akismet', 'load_form_js' ) ); + add_action( 'do_shortcode_tag', array( 'Akismet', 'load_form_js_via_filter' ), 10, 4 ); + + add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments' ) ); + add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments_meta' ) ); + add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_orphaned_commentmeta' ) ); + add_action( 'akismet_schedule_cron_recheck', array( 'Akismet', 'cron_recheck' ) ); + + add_action( 'comment_form', array( 'Akismet', 'add_comment_nonce' ), 1 ); + add_action( 'comment_form', array( 'Akismet', 'output_custom_form_fields' ) ); + add_filter( 'script_loader_tag', array( 'Akismet', 'set_form_js_async' ), 10, 3 ); + + add_filter( 'comment_moderation_recipients', array( 'Akismet', 'disable_moderation_emails_if_unreachable' ), 1000, 2 ); + add_filter( 'pre_comment_approved', array( 'Akismet', 'last_comment_status' ), 10, 2 ); + + add_action( 'transition_comment_status', array( 'Akismet', 'transition_comment_status' ), 10, 3 ); + + // Run this early in the pingback call, before doing a remote fetch of the source uri + add_action( 'xmlrpc_call', array( 'Akismet', 'pre_check_pingback' ) ); + + // Jetpack compatibility + add_filter( 'jetpack_options_whitelist', array( 'Akismet', 'add_to_jetpack_options_whitelist' ) ); + add_filter( 'jetpack_contact_form_html', array( 'Akismet', 'inject_custom_form_fields' ) ); + add_filter( 'jetpack_contact_form_akismet_values', array( 'Akismet', 'prepare_custom_form_values' ) ); + + // Gravity Forms + add_filter( 'gform_get_form_filter', array( 'Akismet', 'inject_custom_form_fields' ) ); + add_filter( 'gform_akismet_fields', array( 'Akismet', 'prepare_custom_form_values' ) ); + + // Contact Form 7 + add_filter( 'wpcf7_form_elements', array( 'Akismet', 'append_custom_form_fields' ) ); + add_filter( 'wpcf7_akismet_parameters', array( 'Akismet', 'prepare_custom_form_values' ) ); + + // Formidable Forms + add_filter( 'frm_filter_final_form', array( 'Akismet', 'inject_custom_form_fields' ) ); + add_filter( 'frm_akismet_values', array( 'Akismet', 'prepare_custom_form_values' ) ); + + // Fluent Forms + /* + * The Fluent Forms hook names were updated in version 5.0.0. The last version that supported + * the original hook names was 4.3.25, and version 4.3.25 was tested up to WordPress version 6.1. + * + * The legacy hooks are fired before the new hooks. See + * https://github.com/fluentform/fluentform/commit/cc45341afcae400f217470a7bbfb15efdd80454f + * + * The legacy Fluent Forms hooks will be removed when Akismet no longer supports WordPress version 6.1. + * This will provide compatibility with previous versions of Fluent Forms for a reasonable amount of time. + */ + add_filter( 'fluentform_form_element_start', array( 'Akismet', 'output_custom_form_fields' ) ); + add_filter( 'fluentform_akismet_fields', array( 'Akismet', 'prepare_custom_form_values' ), 10, 2 ); + // Current Fluent Form hooks. + add_filter( 'fluentform/form_element_start', array( 'Akismet', 'output_custom_form_fields' ) ); + add_filter( 'fluentform/akismet_fields', array( 'Akismet', 'prepare_custom_form_values' ), 10, 2 ); + + add_action( 'update_option_wordpress_api_key', array( 'Akismet', 'updated_option' ), 10, 2 ); + add_action( 'add_option_wordpress_api_key', array( 'Akismet', 'added_option' ), 10, 2 ); + + add_action( 'comment_form_after', array( 'Akismet', 'display_comment_form_privacy_notice' ) ); + } + + public static function get_api_key() { + return apply_filters( 'akismet_get_api_key', defined('WPCOM_API_KEY') ? constant('WPCOM_API_KEY') : get_option('wordpress_api_key') ); + } + + /** + * Exchange the API key for a token that can only be used to access stats pages. + * + * @return string + */ + public static function get_access_token() { + static $access_token = null; + + if ( is_null( $access_token ) ) { + $request_args = array( 'api_key' => self::get_api_key() ); + + $request_args = apply_filters( 'akismet_request_args', $request_args, 'token' ); + + $response = self::http_post( self::build_query( $request_args ), 'token' ); + + $access_token = $response[1]; + } + + return $access_token; + } + + public static function check_key_status( $key, $ip = null ) { + $request_args = array( + 'key' => $key, + 'blog' => get_option( 'home' ), + ); + + $request_args = apply_filters( 'akismet_request_args', $request_args, 'verify-key' ); + + return self::http_post( self::build_query( $request_args ), 'verify-key', $ip ); + } + + public static function verify_key( $key, $ip = null ) { + // Shortcut for obviously invalid keys. + if ( strlen( $key ) != 12 ) { + return 'invalid'; + } + + $response = self::check_key_status( $key, $ip ); + + if ( $response[1] != 'valid' && $response[1] != 'invalid' ) + return 'failed'; + + return $response[1]; + } + + public static function deactivate_key( $key ) { + $request_args = array( + 'key' => $key, + 'blog' => get_option( 'home' ), + ); + + $request_args = apply_filters( 'akismet_request_args', $request_args, 'deactivate' ); + + $response = self::http_post( self::build_query( $request_args ), 'deactivate' ); + + if ( $response[1] != 'deactivated' ) + return 'failed'; + + return $response[1]; + } + + /** + * Add the akismet option to the Jetpack options management whitelist. + * + * @param array $options The list of whitelisted option names. + * @return array The updated whitelist + */ + public static function add_to_jetpack_options_whitelist( $options ) { + $options[] = 'wordpress_api_key'; + return $options; + } + + /** + * When the akismet option is updated, run the registration call. + * + * This should only be run when the option is updated from the Jetpack/WP.com + * API call, and only if the new key is different than the old key. + * + * @param mixed $old_value The old option value. + * @param mixed $value The new option value. + */ + public static function updated_option( $old_value, $value ) { + // Not an API call + if ( ! class_exists( 'WPCOM_JSON_API_Update_Option_Endpoint' ) ) { + return; + } + // Only run the registration if the old key is different. + if ( $old_value !== $value ) { + self::verify_key( $value ); + } + } + + /** + * Treat the creation of an API key the same as updating the API key to a new value. + * + * @param mixed $option_name Will always be "wordpress_api_key", until something else hooks in here. + * @param mixed $value The option value. + */ + public static function added_option( $option_name, $value ) { + if ( 'wordpress_api_key' === $option_name ) { + return self::updated_option( '', $value ); + } + } + + public static function rest_auto_check_comment( $commentdata ) { + return self::auto_check_comment( $commentdata, 'rest_api' ); + } + + /** + * Check a comment for spam. + * + * @param array $commentdata + * @param string $context What kind of request triggered this comment check? Possible values are 'default', 'rest_api', and 'xml-rpc'. + * @return array|WP_Error Either the $commentdata array with additional entries related to its spam status + * or a WP_Error, if it's a REST API request and the comment should be discarded. + */ + public static function auto_check_comment( $commentdata, $context = 'default' ) { + // If no key is configured, then there's no point in doing any of this. + if ( ! self::get_api_key() ) { + return $commentdata; + } + + self::$last_comment_result = null; + + $comment = $commentdata; + + $comment['user_ip'] = self::get_ip_address(); + $comment['user_agent'] = self::get_user_agent(); + $comment['referrer'] = self::get_referer(); + $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'] ); + } + + /** See filter documentation in init_hooks(). */ + $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 ( self::is_test_mode() ) + $comment['is_test'] = 'true'; + + foreach( $_POST as $key => $value ) { + if ( is_string( $value ) ) + $comment["POST_{$key}"] = $value; + } + + foreach ( $_SERVER as $key => $value ) { + if ( ! is_string( $value ) ) { + continue; + } + + if ( preg_match( "/^HTTP_COOKIE/", $key ) ) { + continue; + } + + // Send any potentially useful $_SERVER vars, but avoid sending junk we don't need. + if ( preg_match( "/^(HTTP_|REMOTE_ADDR|REQUEST_URI|DOCUMENT_URI)/", $key ) ) { + $comment[ "$key" ] = $value; + } + } + + $post = get_post( $comment['comment_post_ID'] ); + + if ( ! is_null( $post ) ) { + // $post can technically be null, although in the past, it's always been an indicator of another plugin interfering. + $comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt; + + // Tags and categories are important context in which to consider the comment. + $comment['comment_context'] = array(); + + $tag_names = wp_get_post_tags( $post->ID, array( 'fields' => 'names' ) ); + + if ( $tag_names && ! is_wp_error( $tag_names ) ) { + foreach ( $tag_names as $tag_name ) { + $comment['comment_context'][] = $tag_name; + } + } + + $category_names = wp_get_post_categories( $post->ID, array( 'fields' => 'names' ) ); + + if ( $category_names && ! is_wp_error( $category_names ) ) { + foreach ( $category_names as $category_name ) { + $comment['comment_context'][] = $category_name; + } + } + } + + /** + * Filter the data that is used to generate the request body for the API call. + * + * @since 5.3.1 + * + * @param array $comment An array of request data. + * @param string $endpoint The API endpoint being requested. + */ + $comment = apply_filters( 'akismet_request_args', $comment, 'comment-check' ); + + $response = self::http_post( self::build_query( $comment ), 'comment-check' ); + + do_action( 'akismet_comment_check_response', $response ); + + $commentdata['comment_as_submitted'] = array_intersect_key( $comment, self::$comment_as_submitted_allowed_keys ); + + // Also include any form fields we inject into the comment form, like ak_js + foreach ( $_POST as $key => $value ) { + if ( is_string( $value ) && strpos( $key, 'ak_' ) === 0 ) { + $commentdata['comment_as_submitted'][ 'POST_' . $key ] = $value; + } + } + + $commentdata['akismet_result'] = $response[1]; + + if ( isset( $response[0]['x-akismet-pro-tip'] ) ) + $commentdata['akismet_pro_tip'] = $response[0]['x-akismet-pro-tip']; + + if ( isset( $response[0]['x-akismet-guid'] ) ) { + $commentdata['akismet_guid'] = $response[0]['x-akismet-guid']; + } + + if ( isset( $response[0]['x-akismet-error'] ) ) { + // An error occurred that we anticipated (like a suspended key) and want the user to act on. + // Send to moderation. + self::$last_comment_result = '0'; + } + else if ( 'true' == $response[1] ) { + // akismet_spam_count will be incremented later by comment_is_spam() + self::$last_comment_result = 'spam'; + + $discard = ( isset( $commentdata['akismet_pro_tip'] ) && $commentdata['akismet_pro_tip'] === 'discard' && self::allow_discard() ); + + do_action( 'akismet_spam_caught', $discard ); + + if ( $discard ) { + // The spam is obvious, so we're bailing out early. + // 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 ); + } + + if ( 'rest_api' === $context ) { + return new WP_Error( 'akismet_rest_comment_discarded', __( 'Comment discarded.', 'akismet' ) ); + } else if ( 'xml-rpc' === $context ) { + // If this is a pingback that we're pre-checking, the discard behavior is the same as the normal spam response behavior. + return $commentdata; + } else { + // Redirect back to the previous page, or failing that, the post permalink, or failing that, the homepage of the blog. + $redirect_to = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : ( $post ? get_permalink( $post ) : home_url() ); + wp_safe_redirect( esc_url_raw( $redirect_to ) ); + die(); + } + } + else if ( 'rest_api' === $context ) { + // The way the REST API structures its calls, we can set the comment_approved value right away. + $commentdata['comment_approved'] = 'spam'; + } + } + + // if the response is neither true nor false, hold the comment for moderation and schedule a recheck + if ( 'true' != $response[1] && 'false' != $response[1] ) { + if ( !current_user_can('moderate_comments') ) { + // Comment status should be moderated + self::$last_comment_result = '0'; + } + + if ( ! wp_next_scheduled( 'akismet_schedule_cron_recheck' ) ) { + wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); + do_action( 'akismet_scheduled_recheck', 'invalid-response-' . $response[1] ); + } + + self::$prevent_moderation_email_for_these_comments[] = $commentdata; + } + + // Delete old comments daily + if ( ! wp_next_scheduled( 'akismet_scheduled_delete' ) ) { + wp_schedule_event( time(), 'daily', 'akismet_scheduled_delete' ); + } + + self::set_last_comment( $commentdata ); + self::fix_scheduled_recheck(); + + return $commentdata; + } + + public static function get_last_comment() { + return self::$last_comment; + } + + public static function set_last_comment( $comment ) { + if ( is_null( $comment ) ) { + self::$last_comment = null; + } + else { + // We filter it here so that it matches the filtered comment data that we'll have to compare against later. + // wp_filter_comment expects comment_author_IP + self::$last_comment = wp_filter_comment( + array_merge( + array( 'comment_author_IP' => self::get_ip_address() ), + $comment + ) + ); + } + } + + // this fires on wp_insert_comment. we can't update comment_meta when auto_check_comment() runs + // because we don't know the comment ID at that point. + public static function auto_check_update_meta( $id, $comment ) { + // wp_insert_comment() might be called in other contexts, so make sure this is the same comment + // as was checked by auto_check_comment + if ( is_object( $comment ) && !empty( self::$last_comment ) && is_array( self::$last_comment ) ) { + if ( self::matches_last_comment( $comment ) ) { + load_plugin_textdomain( 'akismet' ); + + // normal result: true or false + if ( self::$last_comment['akismet_result'] == 'true' ) { + update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' ); + self::update_comment_history( $comment->comment_ID, '', 'check-spam' ); + if ( $comment->comment_approved != 'spam' ) { + self::update_comment_history( + $comment->comment_ID, + '', + 'status-changed-' . $comment->comment_approved + ); + } + } elseif ( self::$last_comment['akismet_result'] == 'false' ) { + update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' ); + self::update_comment_history( $comment->comment_ID, '', 'check-ham' ); + // Status could be spam or trash, depending on the WP version and whether this change applies: + // https://core.trac.wordpress.org/changeset/34726 + if ( $comment->comment_approved == 'spam' || $comment->comment_approved == 'trash' ) { + if ( function_exists( 'wp_check_comment_disallowed_list' ) ) { + if ( wp_check_comment_disallowed_list( $comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent ) ) { + self::update_comment_history( $comment->comment_ID, '', 'wp-disallowed' ); + } else { + self::update_comment_history( $comment->comment_ID, '', 'status-changed-' . $comment->comment_approved ); + } + } else if ( function_exists( 'wp_blacklist_check' ) && wp_blacklist_check( $comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent ) ) { + self::update_comment_history( $comment->comment_ID, '', 'wp-blacklisted' ); + } else { + self::update_comment_history( $comment->comment_ID, '', 'status-changed-' . $comment->comment_approved ); + } + } + } else { + // abnormal result: error + update_comment_meta( $comment->comment_ID, 'akismet_error', time() ); + self::update_comment_history( + $comment->comment_ID, + '', + 'check-error', + array( 'response' => substr( self::$last_comment['akismet_result'], 0, 50 ) ) + ); + } + + // record the complete original data as submitted for checking + if ( isset( self::$last_comment['comment_as_submitted'] ) ) { + update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', self::$last_comment['comment_as_submitted'] ); + } + + if ( isset( self::$last_comment['akismet_pro_tip'] ) ) { + update_comment_meta( $comment->comment_ID, 'akismet_pro_tip', self::$last_comment['akismet_pro_tip'] ); + } + + if ( isset( self::$last_comment['akismet_guid'] ) ) { + update_comment_meta( $comment->comment_ID, 'akismet_guid', self::$last_comment['akismet_guid'] ); + } + } + } + } + + public static function delete_old_comments() { + global $wpdb; + + /** + * Determines how many comments will be deleted in each batch. + * + * @param int The default, as defined by AKISMET_DELETE_LIMIT. + */ + $delete_limit = apply_filters( 'akismet_delete_comment_limit', defined( 'AKISMET_DELETE_LIMIT' ) ? AKISMET_DELETE_LIMIT : 10000 ); + $delete_limit = max( 1, intval( $delete_limit ) ); + + /** + * Determines how many days a comment will be left in the Spam queue before being deleted. + * + * @param int The default number of days. + */ + $delete_interval = apply_filters( 'akismet_delete_comment_interval', 15 ); + $delete_interval = max( 1, intval( $delete_interval ) ); + + while ( $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_id FROM {$wpdb->comments} WHERE DATE_SUB(NOW(), INTERVAL %d DAY) > comment_date_gmt AND comment_approved = 'spam' LIMIT %d", $delete_interval, $delete_limit ) ) ) { + if ( empty( $comment_ids ) ) + return; + + $wpdb->queries = array(); + + $comments = array(); + + foreach ( $comment_ids as $comment_id ) { + $comments[ $comment_id ] = get_comment( $comment_id ); + + do_action( 'delete_comment', $comment_id, $comments[ $comment_id ] ); + do_action( 'akismet_batch_delete_count', __FUNCTION__ ); + } + + // Prepared as strings since comment_id is an unsigned BIGINT, and using %d will constrain the value to the maximum signed BIGINT. + $format_string = implode( ', ', array_fill( 0, is_countable( $comment_ids ) ? count( $comment_ids ) : 0, '%s' ) ); + + $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->comments} WHERE comment_id IN ( " . $format_string . " )", $comment_ids ) ); + $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->commentmeta} WHERE comment_id IN ( " . $format_string . " )", $comment_ids ) ); + + foreach ( $comment_ids as $comment_id ) { + do_action( 'deleted_comment', $comment_id, $comments[ $comment_id ] ); + unset( $comments[ $comment_id ] ); + } + + clean_comment_cache( $comment_ids ); + do_action( 'akismet_delete_comment_batch', is_countable( $comment_ids ) ? count( $comment_ids ) : 0 ); + } + + if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->comments ) ) // lucky number + $wpdb->query("OPTIMIZE TABLE {$wpdb->comments}"); + } + + public static function delete_old_comments_meta() { + global $wpdb; + + $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 ); + + # enforce a minimum of 1 day + $interval = absint( $interval ); + if ( $interval < 1 ) + $interval = 1; + + // akismet_as_submitted meta values are large, so expire them + // after $interval days regardless of the comment status + while ( $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT m.comment_id FROM {$wpdb->commentmeta} as m INNER JOIN {$wpdb->comments} as c USING(comment_id) WHERE m.meta_key = 'akismet_as_submitted' AND DATE_SUB(NOW(), INTERVAL %d DAY) > c.comment_date_gmt LIMIT 10000", $interval ) ) ) { + if ( empty( $comment_ids ) ) + return; + + $wpdb->queries = array(); + + foreach ( $comment_ids as $comment_id ) { + delete_comment_meta( $comment_id, 'akismet_as_submitted' ); + do_action( 'akismet_batch_delete_count', __FUNCTION__ ); + } + + do_action( 'akismet_delete_commentmeta_batch', is_countable( $comment_ids ) ? count( $comment_ids ) : 0 ); + } + + if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number + $wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}"); + } + + // Clear out comments meta that no longer have corresponding comments in the database + public static function delete_orphaned_commentmeta() { + global $wpdb; + + $last_meta_id = 0; + $start_time = isset( $_SERVER['REQUEST_TIME_FLOAT'] ) ? $_SERVER['REQUEST_TIME_FLOAT'] : microtime( true ); + $max_exec_time = max( ini_get('max_execution_time') - 5, 3 ); + + while ( $commentmeta_results = $wpdb->get_results( $wpdb->prepare( "SELECT m.meta_id, m.comment_id, m.meta_key FROM {$wpdb->commentmeta} as m LEFT JOIN {$wpdb->comments} as c USING(comment_id) WHERE c.comment_id IS NULL AND m.meta_id > %d ORDER BY m.meta_id LIMIT 1000", $last_meta_id ) ) ) { + if ( empty( $commentmeta_results ) ) + return; + + $wpdb->queries = array(); + + $commentmeta_deleted = 0; + + foreach ( $commentmeta_results as $commentmeta ) { + if ( 'akismet_' == substr( $commentmeta->meta_key, 0, 8 ) ) { + delete_comment_meta( $commentmeta->comment_id, $commentmeta->meta_key ); + do_action( 'akismet_batch_delete_count', __FUNCTION__ ); + $commentmeta_deleted++; + } + + $last_meta_id = $commentmeta->meta_id; + } + + do_action( 'akismet_delete_commentmeta_batch', $commentmeta_deleted ); + + // If we're getting close to max_execution_time, quit for this round. + if ( microtime(true) - $start_time > $max_exec_time ) + return; + } + + if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number + $wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}"); + } + + // how many approved comments does this author have? + public static function get_user_comments_approved( $user_id, $comment_author_email, $comment_author, $comment_author_url ) { + global $wpdb; + + /** + * Which comment types should be ignored when counting a user's approved comments? + * + * Some plugins add entries to the comments table that are not actual + * comments that could have been checked by Akismet. Allow these comments + * to be excluded from the "approved comment count" query in order to + * avoid artificially inflating the approved comment count. + * + * @param array $comment_types An array of comment types that won't be considered + * when counting a user's approved comments. + * + * @since 4.2.2 + */ + $excluded_comment_types = apply_filters( 'akismet_excluded_comment_types', array() ); + + $comment_type_where = ''; + + if ( is_array( $excluded_comment_types ) && ! empty( $excluded_comment_types ) ) { + $excluded_comment_types = array_unique( $excluded_comment_types ); + + foreach ( $excluded_comment_types as $excluded_comment_type ) { + $comment_type_where .= $wpdb->prepare( ' AND comment_type <> %s ', $excluded_comment_type ); + } + } + + if ( ! empty( $user_id ) ) { + return (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->comments} WHERE user_id = %d AND comment_approved = 1" . $comment_type_where, $user_id ) ); + } + + if ( ! empty( $comment_author_email ) ) { + return (int) $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_type_where, $comment_author_email, $comment_author, $comment_author_url ) ); + } + + return 0; + } + + // get the full comment history for a given comment, as an array in reverse chronological order + public static function get_comment_history( $comment_id ) { + $history = get_comment_meta( $comment_id, 'akismet_history', false ); + if ( empty( $history ) || empty( $history[ 0 ] ) ) { + return false; + } + + /* + // To see all variants when testing. + $history[] = array( 'time' => 445856401, 'message' => 'Old versions of Akismet stored the message as a literal string in the commentmeta.', 'event' => null ); + $history[] = array( 'time' => 445856402, 'event' => 'recheck-spam' ); + $history[] = array( 'time' => 445856403, 'event' => 'check-spam' ); + $history[] = array( 'time' => 445856404, 'event' => 'recheck-ham' ); + $history[] = array( 'time' => 445856405, 'event' => 'check-ham' ); + $history[] = array( 'time' => 445856406, 'event' => 'wp-blacklisted' ); + $history[] = array( 'time' => 445856406, 'event' => 'wp-disallowed' ); + $history[] = array( 'time' => 445856407, 'event' => 'report-spam' ); + $history[] = array( 'time' => 445856408, 'event' => 'report-spam', 'user' => 'sam' ); + $history[] = array( 'message' => 'sam reported this comment as spam (hardcoded message).', 'time' => 445856400, 'event' => 'report-spam', 'user' => 'sam' ); + $history[] = array( 'time' => 445856409, 'event' => 'report-ham', 'user' => 'sam' ); + $history[] = array( 'message' => 'sam reported this comment as ham (hardcoded message).', 'time' => 445856400, 'event' => 'report-ham', 'user' => 'sam' ); // + $history[] = array( 'time' => 445856410, 'event' => 'cron-retry-spam' ); + $history[] = array( 'time' => 445856411, 'event' => 'cron-retry-ham' ); + $history[] = array( 'time' => 445856412, 'event' => 'check-error' ); // + $history[] = array( 'time' => 445856413, 'event' => 'check-error', 'meta' => array( 'response' => 'The server was taking a nap.' ) ); + $history[] = array( 'time' => 445856414, 'event' => 'recheck-error' ); // Should not generate a message. + $history[] = array( 'time' => 445856415, 'event' => 'recheck-error', 'meta' => array( 'response' => 'The server was taking a nap.' ) ); + $history[] = array( 'time' => 445856416, 'event' => 'status-changedtrash' ); + $history[] = array( 'time' => 445856417, 'event' => 'status-changedspam' ); + $history[] = array( 'time' => 445856418, 'event' => 'status-changedhold' ); + $history[] = array( 'time' => 445856419, 'event' => 'status-changedapprove' ); + $history[] = array( 'time' => 445856420, 'event' => 'status-changed-trash' ); + $history[] = array( 'time' => 445856421, 'event' => 'status-changed-spam' ); + $history[] = array( 'time' => 445856422, 'event' => 'status-changed-hold' ); + $history[] = array( 'time' => 445856423, 'event' => 'status-changed-approve' ); + $history[] = array( 'time' => 445856424, 'event' => 'status-trash', 'user' => 'sam' ); + $history[] = array( 'time' => 445856425, 'event' => 'status-spam', 'user' => 'sam' ); + $history[] = array( 'time' => 445856426, 'event' => 'status-hold', 'user' => 'sam' ); + $history[] = array( 'time' => 445856427, 'event' => 'status-approve', 'user' => 'sam' ); + */ + + usort( $history, array( 'Akismet', '_cmp_time' ) ); + return $history; + } + + /** + * Log an event for a given comment, storing it in comment_meta. + * + * @param int $comment_id The ID of the relevant comment. + * @param string $message The string description of the event. No longer used. + * @param string $event The event code. + * @param array $meta Metadata about the history entry. e.g., the user that reported or changed the status of a given comment. + */ + public static function update_comment_history( $comment_id, $message, $event=null, $meta=null ) { + global $current_user; + + $user = ''; + + $event = array( + 'time' => self::_get_microtime(), + 'event' => $event, + ); + + if ( is_object( $current_user ) && isset( $current_user->user_login ) ) { + $event['user'] = $current_user->user_login; + } + + if ( ! empty( $meta ) ) { + $event['meta'] = $meta; + } + + // $unique = false so as to allow multiple values per comment + $r = add_comment_meta( $comment_id, 'akismet_history', $event, false ); + } + + public static function check_db_comment( $id, $recheck_reason = 'recheck_queue' ) { + global $wpdb; + + if ( ! self::get_api_key() ) { + return new WP_Error( 'akismet-not-configured', __( 'Akismet is not configured. Please enter an API key.', 'akismet' ) ); + } + + $c = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $id ), ARRAY_A ); + + if ( ! $c ) { + return new WP_Error( 'invalid-comment-id', __( 'Comment not found.', 'akismet' ) ); + } + + $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']); + $c['recheck_reason'] = $recheck_reason; + + $c['user_role'] = ''; + if ( ! empty( $c['user_ID'] ) ) { + $c['user_role'] = Akismet::get_user_roles( $c['user_ID'] ); + } + + if ( self::is_test_mode() ) + $c['is_test'] = 'true'; + + $c = apply_filters( 'akismet_request_args', $c, 'comment-check' ); + + $response = self::http_post( self::build_query( $c ), 'comment-check' ); + + if ( ! empty( $response[1] ) ) { + return $response[1]; + } + + return false; + } + + public static function recheck_comment( $id, $recheck_reason = 'recheck_queue' ) { + add_comment_meta( $id, 'akismet_rechecking', true ); + + $api_response = self::check_db_comment( $id, $recheck_reason ); + + if ( is_wp_error( $api_response ) ) { + // Invalid comment ID. + } + else if ( 'true' === $api_response ) { + wp_set_comment_status( $id, 'spam' ); + update_comment_meta( $id, 'akismet_result', 'true' ); + delete_comment_meta( $id, 'akismet_error' ); + delete_comment_meta( $id, 'akismet_delayed_moderation_email' ); + Akismet::update_comment_history( $id, '', 'recheck-spam' ); + } + elseif ( 'false' === $api_response ) { + update_comment_meta( $id, 'akismet_result', 'false' ); + delete_comment_meta( $id, 'akismet_error' ); + delete_comment_meta( $id, 'akismet_delayed_moderation_email' ); + Akismet::update_comment_history( $id, '', 'recheck-ham' ); + } + else { + // abnormal result: error + update_comment_meta( $id, 'akismet_result', 'error' ); + Akismet::update_comment_history( + $id, + '', + 'recheck-error', + array( 'response' => substr( $api_response, 0, 50 ) ) + ); + } + + delete_comment_meta( $id, 'akismet_rechecking' ); + + return $api_response; + } + + public static function transition_comment_status( $new_status, $old_status, $comment ) { + + if ( $new_status == $old_status ) + return; + + if ( 'spam' === $new_status || 'spam' === $old_status ) { + // Clear the cache of the "X comments in your spam queue" count on the dashboard. + wp_cache_delete( 'akismet_spam_count', 'widget' ); + } + + # we don't need to record a history item for deleted comments + if ( $new_status == 'delete' ) + return; + + if ( !current_user_can( 'edit_post', $comment->comment_post_ID ) && !current_user_can( 'moderate_comments' ) ) + return; + + if ( defined('WP_IMPORTING') && WP_IMPORTING == true ) + return; + + // if this is present, it means the status has been changed by a re-check, not an explicit user action + if ( get_comment_meta( $comment->comment_ID, 'akismet_rechecking' ) ) + return; + + // Assumption alert: + // We want to submit comments to Akismet only when a moderator explicitly spams or approves it - not if the status + // is changed automatically by another plugin. Unfortunately WordPress doesn't provide an unambiguous way to + // determine why the transition_comment_status action was triggered. And there are several different ways by which + // to spam and unspam comments: bulk actions, ajax, links in moderation emails, the dashboard, and perhaps others. + // We'll assume that this is an explicit user action if certain POST/GET variables exist. + if ( + // status=spam: Marking as spam via the REST API or... + // status=unspam: I'm not sure. Maybe this used to be used instead of status=approved? Or the UI for removing from spam but not approving has been since removed?... + // status=approved: Unspamming via the REST API (Calypso) or... + ( isset( $_POST['status'] ) && in_array( $_POST['status'], array( 'spam', 'unspam', 'approved', ) ) ) + // spam=1: Clicking "Spam" underneath a comment in wp-admin and allowing the AJAX request to happen. + || ( isset( $_POST['spam'] ) && (int) $_POST['spam'] == 1 ) + // unspam=1: Clicking "Not Spam" underneath a comment in wp-admin and allowing the AJAX request to happen. Or, clicking "Undo" after marking something as spam. + || ( isset( $_POST['unspam'] ) && (int) $_POST['unspam'] == 1 ) + // comment_status=spam/unspam: It's unclear where this is happening. + || ( isset( $_POST['comment_status'] ) && in_array( $_POST['comment_status'], array( 'spam', 'unspam' ) ) ) + // action=spam: Choosing "Mark as Spam" from the Bulk Actions dropdown in wp-admin (or the "Spam it" link in notification emails). + // action=unspam: Choosing "Not Spam" from the Bulk Actions dropdown in wp-admin. + // action=spamcomment: Following the "Spam" link below a comment in wp-admin (not allowing AJAX request to happen). + // action=unspamcomment: Following the "Not Spam" link below a comment in wp-admin (not allowing AJAX request to happen). + || ( isset( $_GET['action'] ) && in_array( $_GET['action'], array( 'spam', 'unspam', 'spamcomment', 'unspamcomment', ) ) ) + // action=editedcomment: Editing a comment via wp-admin (and possibly changing its status). + || ( isset( $_POST['action'] ) && in_array( $_POST['action'], array( 'editedcomment' ) ) ) + // for=jetpack: Moderation via the WordPress app, Calypso, anything powered by the Jetpack connection. + || ( isset( $_GET['for'] ) && ( 'jetpack' == $_GET['for'] ) && ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) ) + // Certain WordPress.com API requests + || ( defined( 'REST_API_REQUEST' ) && REST_API_REQUEST ) + // WordPress.org REST API requests + || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) + ) { + if ( $new_status == 'spam' && ( $old_status == 'approved' || $old_status == 'unapproved' || !$old_status ) ) { + return self::submit_spam_comment( $comment->comment_ID ); + } elseif ( $old_status == 'spam' && ( $new_status == 'approved' || $new_status == 'unapproved' ) ) { + return self::submit_nonspam_comment( $comment->comment_ID ); + } + } + + self::update_comment_history( $comment->comment_ID, '', 'status-' . $new_status ); + } + + public static function submit_spam_comment( $comment_id ) { + global $wpdb, $current_user, $current_site; + + $comment_id = (int) $comment_id; + + $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) ); + + if ( !$comment ) // it was deleted + return; + + if ( 'spam' != $comment->comment_approved ) + return; + + self::update_comment_history( $comment_id, '', 'report-spam' ); + + // If the user hasn't configured Akismet, there's nothing else to do at this point. + if ( ! self::get_api_key() ) { + return; + } + + // use the original version stored in comment_meta if available + $as_submitted = self::sanitize_comment_as_submitted( get_comment_meta( $comment_id, 'akismet_as_submitted', true ) ); + + if ( $as_submitted && is_array( $as_submitted ) && isset( $as_submitted['comment_content'] ) ) + $comment = (object) array_merge( (array)$comment, $as_submitted ); + + $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 ( is_object($current_user) ) + $comment->reporter = $current_user->user_login; + + if ( is_object($current_site) ) + $comment->site_domain = $current_site->domain; + + $comment->user_role = ''; + if ( ! empty( $comment->user_ID ) ) { + $comment->user_role = Akismet::get_user_roles( $comment->user_ID ); + } + + if ( self::is_test_mode() ) + $comment->is_test = 'true'; + + $post = get_post( $comment->comment_post_ID ); + + if ( ! is_null( $post ) ) { + $comment->comment_post_modified_gmt = $post->post_modified_gmt; + } + + $comment = apply_filters( 'akismet_request_args', $comment, 'submit-spam' ); + + $response = self::http_post( self::build_query( $comment ), 'submit-spam' ); + + update_comment_meta( $comment_id, 'akismet_user_result', 'true' ); + + if ( $comment->reporter ) { + update_comment_meta( $comment_id, 'akismet_user', $comment->reporter ); + } + + do_action('akismet_submit_spam_comment', $comment_id, $response[1]); + } + + public static function submit_nonspam_comment( $comment_id ) { + global $wpdb, $current_user, $current_site; + + $comment_id = (int) $comment_id; + + $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) ); + if ( !$comment ) // it was deleted + return; + + self::update_comment_history( $comment_id, '', 'report-ham' ); + + // If the user hasn't configured Akismet, there's nothing else to do at this point. + if ( ! self::get_api_key() ) { + return; + } + + // use the original version stored in comment_meta if available + $as_submitted = self::sanitize_comment_as_submitted( get_comment_meta( $comment_id, 'akismet_as_submitted', true ) ); + + if ( $as_submitted && is_array($as_submitted) && isset($as_submitted['comment_content']) ) + $comment = (object) array_merge( (array)$comment, $as_submitted ); + + $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 ); + $comment->user_role = ''; + + if ( is_object($current_user) ) + $comment->reporter = $current_user->user_login; + + if ( is_object($current_site) ) + $comment->site_domain = $current_site->domain; + + if ( ! empty( $comment->user_ID ) ) { + $comment->user_role = Akismet::get_user_roles( $comment->user_ID ); + } + + if ( Akismet::is_test_mode() ) + $comment->is_test = 'true'; + + $post = get_post( $comment->comment_post_ID ); + + if ( ! is_null( $post ) ) { + $comment->comment_post_modified_gmt = $post->post_modified_gmt; + } + + $comment = apply_filters( 'akismet_request_args', $comment, 'submit-ham' ); + + $response = self::http_post( self::build_query( $comment ), 'submit-ham' ); + + update_comment_meta( $comment_id, 'akismet_user_result', 'false' ); + + if ( $comment->reporter ) { + update_comment_meta( $comment_id, 'akismet_user', $comment->reporter ); + } + + do_action('akismet_submit_nonspam_comment', $comment_id, $response[1]); + } + + public static function cron_recheck() { + global $wpdb; + + $api_key = self::get_api_key(); + + $status = self::verify_key( $api_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' ); + do_action( 'akismet_scheduled_recheck', 'key-problem-' . get_option( 'akismet_alert_code' ) . '-' . $status ); + return false; + } + + delete_option('akismet_available_servers'); + + $comment_errors = $wpdb->get_col( "SELECT comment_id FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error' LIMIT 100" ); + + load_plugin_textdomain( 'akismet' ); + + 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 // Comment has been deleted + || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) // Comment is too old. + || $comment->comment_approved !== "0" // Comment is no longer in the Pending queue + ) { + delete_comment_meta( $comment_id, 'akismet_error' ); + delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); + continue; + } + + add_comment_meta( $comment_id, 'akismet_rechecking', true ); + $status = self::check_db_comment( $comment_id, 'retry' ); + + $event = ''; + if ( $status == 'true' ) { + $event = 'cron-retry-spam'; + } elseif ( $status == 'false' ) { + $event = 'cron-retry-ham'; + } + + // 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( $event ) ) { + delete_comment_meta( $comment_id, 'akismet_error' ); + self::update_comment_history( $comment_id, '', $event ); + 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 if ( get_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ) ) + wp_notify_moderator( $comment_id ); + } + } + + delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); + } else { + // If this comment has been pending moderation for longer than MAX_DELAY_BEFORE_MODERATION_EMAIL, + // send a moderation email now. + if ( ( intval( gmdate( 'U' ) ) - strtotime( $comment->comment_date_gmt ) ) < self::MAX_DELAY_BEFORE_MODERATION_EMAIL ) { + delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); + wp_notify_moderator( $comment_id ); + } + + delete_comment_meta( $comment_id, 'akismet_rechecking' ); + wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); + do_action( 'akismet_scheduled_recheck', 'check-db-comment-' . $status ); + 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' ); + do_action( 'akismet_scheduled_recheck', 'remaining' ); + } + } + + public static function 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' ); + do_action( 'akismet_scheduled_recheck', 'fix-scheduled-recheck' ); + } + } + + public static function add_comment_nonce( $post_id ) { + /** + * To disable the Akismet comment nonce, add a filter for the 'akismet_comment_nonce' tag + * and return any string value that is not 'true' or '' (empty string). + * + * Don't return boolean false, because that implies that the 'akismet_comment_nonce' option + * has not been set and that Akismet should just choose the default behavior for that + * situation. + */ + + if ( ! self::get_api_key() ) { + return; + } + + $akismet_comment_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) ); + + if ( $akismet_comment_nonce_option == 'true' || $akismet_comment_nonce_option == '' ) { + echo '<p style="display: none;">'; + wp_nonce_field( 'akismet_comment_nonce_' . $post_id, 'akismet_comment_nonce', FALSE ); + echo '</p>'; + } + } + + public static function is_test_mode() { + return defined('AKISMET_TEST_MODE') && AKISMET_TEST_MODE; + } + + public static function allow_discard() { + if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) + return false; + if ( is_user_logged_in() ) + return false; + + return ( get_option( 'akismet_strictness' ) === '1' ); + } + + public static function get_ip_address() { + return isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : null; + } + + /** + * Do these two comments, without checking the comment_ID, "match"? + * + * @param mixed $comment1 A comment object or array. + * @param mixed $comment2 A comment object or array. + * @return bool Whether the two comments should be treated as the same comment. + */ + private static function comments_match( $comment1, $comment2 ) { + $comment1 = (array) $comment1; + $comment2 = (array) $comment2; + + // Set default values for these strings that we check in order to simplify + // the checks and avoid PHP warnings. + if ( ! isset( $comment1['comment_author'] ) ) { + $comment1['comment_author'] = ''; + } + + if ( ! isset( $comment2['comment_author'] ) ) { + $comment2['comment_author'] = ''; + } + + if ( ! isset( $comment1['comment_author_email'] ) ) { + $comment1['comment_author_email'] = ''; + } + + if ( ! isset( $comment2['comment_author_email'] ) ) { + $comment2['comment_author_email'] = ''; + } + + $comments_match = ( + isset( $comment1['comment_post_ID'], $comment2['comment_post_ID'] ) + && intval( $comment1['comment_post_ID'] ) == intval( $comment2['comment_post_ID'] ) + && ( + // The comment author length max is 255 characters, limited by the TINYTEXT column type. + // If the comment author includes multibyte characters right around the 255-byte mark, they + // may be stripped when the author is saved in the DB, so a 300+ char author may turn into + // a 253-char author when it's saved, not 255 exactly. The longest possible character is + // theoretically 6 bytes, so we'll only look at the first 248 bytes to be safe. + substr( $comment1['comment_author'], 0, 248 ) == substr( $comment2['comment_author'], 0, 248 ) + || substr( stripslashes( $comment1['comment_author'] ), 0, 248 ) == substr( $comment2['comment_author'], 0, 248 ) + || substr( $comment1['comment_author'], 0, 248 ) == substr( stripslashes( $comment2['comment_author'] ), 0, 248 ) + // Certain long comment author names will be truncated to nothing, depending on their encoding. + || ( ! $comment1['comment_author'] && strlen( $comment2['comment_author'] ) > 248 ) + || ( ! $comment2['comment_author'] && strlen( $comment1['comment_author'] ) > 248 ) + ) + && ( + // The email max length is 100 characters, limited by the VARCHAR(100) column type. + // Same argument as above for only looking at the first 93 characters. + substr( $comment1['comment_author_email'], 0, 93 ) == substr( $comment2['comment_author_email'], 0, 93 ) + || substr( stripslashes( $comment1['comment_author_email'] ), 0, 93 ) == substr( $comment2['comment_author_email'], 0, 93 ) + || substr( $comment1['comment_author_email'], 0, 93 ) == substr( stripslashes( $comment2['comment_author_email'] ), 0, 93 ) + // Very long emails can be truncated and then stripped if the [0:100] substring isn't a valid address. + || ( ! $comment1['comment_author_email'] && strlen( $comment2['comment_author_email'] ) > 100 ) + || ( ! $comment2['comment_author_email'] && strlen( $comment1['comment_author_email'] ) > 100 ) + ) + ); + + return $comments_match; + } + + // Does the supplied comment match the details of the one most recently stored in self::$last_comment? + public static function matches_last_comment( $comment ) { + return self::comments_match( self::$last_comment, $comment ); + } + + private static function get_user_agent() { + return isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : null; + } + + private static function get_referer() { + return isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : null; + } + + // return a comma-separated list of role names for the given user + public static function get_user_roles( $user_id ) { + $comment_user = null; + $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 = implode( ',', $comment_user->roles ); + } + + if ( is_multisite() && is_super_admin( $user_id ) ) { + if ( empty( $roles ) ) { + $roles = 'super_admin'; + } else { + $comment_user->roles[] = 'super_admin'; + $roles = implode( ',', $comment_user->roles ); + } + } + + return $roles; + } + + // filter handler used to return a spam result to pre_comment_approved + public static function last_comment_status( $approved, $comment ) { + if ( is_null( self::$last_comment_result ) ) { + // We didn't have reason to store the result of the last check. + return $approved; + } + + // Only do this if it's the correct comment + if ( ! self::matches_last_comment( $comment ) ) { + self::log( "comment_is_spam mismatched comment, returning unaltered $approved" ); + return $approved; + } + + if ( 'trash' === $approved ) { + // If the last comment we checked has had its approval set to 'trash', + // then it failed the comment blacklist check. Let that blacklist override + // the spam check, since users have the (valid) expectation that when + // they fill out their blacklists, comments that match it will always + // end up in the trash. + return $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') + $incr ); + + return self::$last_comment_result; + } + + /** + * If Akismet is temporarily unreachable, we don't want to "spam" the blogger with + * moderation emails for comments that will be automatically cleared or spammed on + * the next retry. + * + * For comments that will be rechecked later, empty the list of email addresses that + * the moderation email would be sent to. + * + * @param array $emails An array of email addresses that the moderation email will be sent to. + * @param int $comment_id The ID of the relevant comment. + * @return array An array of email addresses that the moderation email will be sent to. + */ + public static function disable_moderation_emails_if_unreachable( $emails, $comment_id ) { + if ( ! empty( self::$prevent_moderation_email_for_these_comments ) && ! empty( $emails ) ) { + $comment = get_comment( $comment_id ); + + if ( $comment ) { + foreach ( self::$prevent_moderation_email_for_these_comments as $possible_match ) { + if ( self::comments_match( $possible_match, $comment ) ) { + update_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ); + return array(); + } + } + } + } + + return $emails; + } + + public static function _cmp_time( $a, $b ) { + return $a['time'] > $b['time'] ? -1 : 1; + } + + public static function _get_microtime() { + $mtime = explode( ' ', microtime() ); + return $mtime[1] + $mtime[0]; + } + + /** + * Make a POST request to the Akismet API. + * + * @param string $request The body of the request. + * @param string $path The path for the request. + * @param string $ip The specific IP address to hit. + * @return array A two-member array consisting of the headers and the response body, both empty in the case of a failure. + */ + public static function http_post( $request, $path, $ip=null ) { + + $akismet_ua = sprintf( 'WordPress/%s | Akismet/%s', $GLOBALS['wp_version'], constant( 'AKISMET_VERSION' ) ); + $akismet_ua = apply_filters( 'akismet_ua', $akismet_ua ); + + $host = self::API_HOST; + $api_key = self::get_api_key(); + + if ( $api_key ) { + $request = add_query_arg( 'api_key', $api_key, $request ); + } + + $http_host = $host; + // use a specific IP if provided + // needed by Akismet_Admin::check_server_connectivity() + if ( $ip && long2ip( ip2long( $ip ) ) ) { + $http_host = $ip; + } + + $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 = $http_akismet_url = "http://{$http_host}/1.1/{$path}"; + + /** + * Try SSL first; if that fails, try without it and don't try it again for a while. + */ + + $ssl = $ssl_failed = false; + + // Check if SSL requests were disabled fewer than X hours ago. + $ssl_disabled = get_option( 'akismet_ssl_disabled' ); + + if ( $ssl_disabled && $ssl_disabled < ( time() - 60 * 60 * 24 ) ) { // 24 hours + $ssl_disabled = false; + delete_option( 'akismet_ssl_disabled' ); + } + else if ( $ssl_disabled ) { + do_action( 'akismet_ssl_disabled' ); + } + + if ( ! $ssl_disabled && ( $ssl = wp_http_supports( array( 'ssl' ) ) ) ) { + $akismet_url = set_url_scheme( $akismet_url, 'https' ); + + do_action( 'akismet_https_request_pre' ); + } + + $response = wp_remote_post( $akismet_url, $http_args ); + + Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) ); + + if ( $ssl && is_wp_error( $response ) ) { + do_action( 'akismet_https_request_failure', $response ); + + // Intermittent connection problems may cause the first HTTPS + // request to fail and subsequent HTTP requests to succeed randomly. + // Retry the HTTPS request once before disabling SSL for a time. + $response = wp_remote_post( $akismet_url, $http_args ); + + Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) ); + + if ( is_wp_error( $response ) ) { + $ssl_failed = true; + + do_action( 'akismet_https_request_failure', $response ); + + do_action( 'akismet_http_request_pre' ); + + // Try the request again without SSL. + $response = wp_remote_post( $http_akismet_url, $http_args ); + + Akismet::log( compact( 'http_akismet_url', 'http_args', 'response' ) ); + } + } + + if ( is_wp_error( $response ) ) { + do_action( 'akismet_request_failure', $response ); + + return array( '', '' ); + } + + if ( $ssl_failed ) { + // The request failed when using SSL but succeeded without it. Disable SSL for future requests. + update_option( 'akismet_ssl_disabled', time() ); + + do_action( 'akismet_https_disabled' ); + } + + $simplified_response = array( $response['headers'], $response['body'] ); + + self::update_alert( $simplified_response ); + + return $simplified_response; + } + + // given a response from an API call like check_key_status(), update the alert code options if an alert is present. + public static function update_alert( $response ) { + $alert_option_prefix = 'akismet_alert_'; + $alert_header_prefix = 'x-akismet-alert-'; + $alert_header_names = array( + 'code', + 'msg', + 'api-calls', + 'usage-limit', + 'upgrade-plan', + 'upgrade-url', + 'upgrade-type', + ); + + foreach ( $alert_header_names as $alert_header_name ) { + $value = null; + if ( isset( $response[0][ $alert_header_prefix . $alert_header_name ] ) ) { + $value = $response[0][ $alert_header_prefix . $alert_header_name ]; + } + + $option_name = $alert_option_prefix . str_replace( '-', '_', $alert_header_name ); + if ( $value != get_option( $option_name ) ) { + if ( ! $value ) { + delete_option( $option_name ); + } else { + update_option( $option_name, $value ); + } + } + } + } + + /** + * Mark akismet-frontend.js as deferred. Because nothing depends on it, it can run at any time + * after it's loaded, and the browser won't have to wait for it to load to continue + * parsing the rest of the page. + */ + public static function set_form_js_async( $tag, $handle, $src ) { + if ( 'akismet-frontend' !== $handle ) { + return $tag; + } + + return preg_replace( '/^<script /i', '<script defer ', $tag ); + } + + public static function get_akismet_form_fields() { + $fields = ''; + + $prefix = 'ak_'; + + // Contact Form 7 uses _wpcf7 as a prefix to know which fields to exclude from comment_content. + if ( 'wpcf7_form_elements' === current_filter() ) { + $prefix = '_wpcf7_ak_'; + } + + $fields .= '<p style="display: none !important;" class="akismet-fields-container" data-prefix="' . esc_attr( $prefix ) . '">'; + $fields .= '<label>Δ<textarea name="' . $prefix . 'hp_textarea" cols="45" rows="8" maxlength="100"></textarea></label>'; + + if ( ! function_exists( 'amp_is_request' ) || ! amp_is_request() ) { + // Keep track of how many ak_js fields are in this page so that we don't re-use + // the same ID. + static $field_count = 0; + + $field_count++; + + $fields .= '<input type="hidden" id="ak_js_' . $field_count . '" name="' . $prefix . 'js" value="' . mt_rand( 0, 250 ) . '"/>'; + $fields .= '<script>document.getElementById( "ak_js_' . $field_count . '" ).setAttribute( "value", ( new Date() ).getTime() );</script>'; + } + + $fields .= '</p>'; + + return $fields; + } + + public static function output_custom_form_fields( $post_id ) { + if ( 'fluentform/form_element_start' === current_filter() && did_action( 'fluentform_form_element_start' ) ) { + // Already did this via the legacy filter. + return; + } + + // phpcs:ignore WordPress.Security.EscapeOutput + echo self::get_akismet_form_fields(); + } + + public static function inject_custom_form_fields( $html ) { + $html = str_replace( '</form>', self::get_akismet_form_fields() . '</form>', $html ); + + return $html; + } + + public static function append_custom_form_fields( $html ) { + $html .= self::get_akismet_form_fields(); + + return $html; + } + + /** + * Ensure that any Akismet-added form fields are included in the comment-check call. + * + * @param array $form + * @param array $data Some plugins will supply the POST data via the filter, since they don't + * read it directly from $_POST. + * @return array $form + */ + public static function prepare_custom_form_values( $form, $data = null ) { + if ( 'fluentform/akismet_fields' === current_filter() && did_filter( 'fluentform_akismet_fields' ) ) { + // Already updated the form fields via the legacy filter. + return $form; + } + + if ( is_null( $data ) ) { + // phpcs:ignore WordPress.Security.NonceVerification.Missing + $data = $_POST; + } + + $prefix = 'ak_'; + + // Contact Form 7 uses _wpcf7 as a prefix to know which fields to exclude from comment_content. + if ( 'wpcf7_akismet_parameters' === current_filter() ) { + $prefix = '_wpcf7_ak_'; + } + + foreach ( $data as $key => $val ) { + if ( 0 === strpos( $key, $prefix ) ) { + $form[ 'POST_ak_' . substr( $key, strlen( $prefix ) ) ] = $val; + } + } + + return $form; + } + + private static function bail_on_activation( $message, $deactivate = true ) { +?> +<!doctype html> +<html> +<head> +<meta charset="<?php bloginfo( 'charset' ); ?>" /> +<style> +* { + text-align: center; + margin: 0; + padding: 0; + font-family: "Lucida Grande",Verdana,Arial,"Bitstream Vera Sans",sans-serif; +} +p { + margin-top: 1em; + font-size: 18px; +} +</style> +</head> +<body> +<p><?php echo esc_html( $message ); ?></p> +</body> +</html> +<?php + if ( $deactivate ) { + $plugins = get_option( 'active_plugins' ); + $akismet = plugin_basename( AKISMET__PLUGIN_DIR . 'akismet.php' ); + $update = false; + foreach ( $plugins as $i => $plugin ) { + if ( $plugin === $akismet ) { + $plugins[$i] = false; + $update = true; + } + } + + if ( $update ) { + update_option( 'active_plugins', array_filter( $plugins ) ); + } + } + exit; + } + + public static function view( $name, array $args = array() ) { + $args = apply_filters( 'akismet_view_arguments', $args, $name ); + + foreach ( $args AS $key => $val ) { + $$key = $val; + } + + load_plugin_textdomain( 'akismet' ); + + $file = AKISMET__PLUGIN_DIR . 'views/'. $name . '.php'; + + include( $file ); + } + + /** + * Attached to activate_{ plugin_basename( __FILES__ ) } by register_activation_hook() + * @static + */ + public static function plugin_activation() { + if ( version_compare( $GLOBALS['wp_version'], AKISMET__MINIMUM_WP_VERSION, '<' ) ) { + load_plugin_textdomain( 'akismet' ); + + $message = '<strong>'.sprintf(esc_html__( 'Akismet %s requires WordPress %s or higher.' , 'akismet'), AKISMET_VERSION, AKISMET__MINIMUM_WP_VERSION ).'</strong> '.sprintf(__('Please <a href="%1$s">upgrade WordPress</a> to a current version, or <a href="%2$s">downgrade to version 2.4 of the Akismet plugin</a>.', 'akismet'), 'https://codex.wordpress.org/Upgrading_WordPress', 'https://wordpress.org/extend/plugins/akismet/download/'); + + Akismet::bail_on_activation( $message ); + } elseif ( ! empty( $_SERVER['SCRIPT_NAME'] ) && false !== strpos( $_SERVER['SCRIPT_NAME'], '/wp-admin/plugins.php' ) ) { + add_option( 'Activated_Akismet', true ); + } + } + + /** + * Removes all connection options + * @static + */ + public static function plugin_deactivation( ) { + self::deactivate_key( self::get_api_key() ); + + // Remove any scheduled cron jobs. + $akismet_cron_events = array( + 'akismet_schedule_cron_recheck', + 'akismet_scheduled_delete', + ); + + foreach ( $akismet_cron_events as $akismet_cron_event ) { + $timestamp = wp_next_scheduled( $akismet_cron_event ); + + if ( $timestamp ) { + wp_unschedule_event( $timestamp, $akismet_cron_event ); + } + } + } + + /** + * Essentially a copy of WP's build_query but one that doesn't expect pre-urlencoded values. + * + * @param array $args An array of key => value pairs + * @return string A string ready for use as a URL query string. + */ + public static function build_query( $args ) { + return _http_build_query( $args, '', '&' ); + } + + /** + * Log debugging info to the error log. + * + * Enabled when WP_DEBUG_LOG is enabled (and WP_DEBUG, since according to + * core, "WP_DEBUG_DISPLAY and WP_DEBUG_LOG perform no function unless + * WP_DEBUG is true), but can be disabled via the akismet_debug_log filter. + * + * @param mixed $akismet_debug The data to log. + */ + public static function log( $akismet_debug ) { + if ( apply_filters( 'akismet_debug_log', defined( 'WP_DEBUG' ) && WP_DEBUG && defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG && defined( 'AKISMET_DEBUG' ) && AKISMET_DEBUG ) ) { + error_log( print_r( compact( 'akismet_debug' ), true ) ); + } + } + + public static function pre_check_pingback( $method ) { + $pingback_args = array(); + if ( $method !== 'pingback.ping' ) + return; + + // A lot of this code is tightly coupled with the IXR class because the xmlrpc_call action doesn't pass along any information besides the method name. + // This ticket should hopefully fix that: https://core.trac.wordpress.org/ticket/52524 + // Until that happens, when it's a system.multicall, pre_check_pingback will be called once for every internal pingback call. + // Keep track of how many times this function has been called so we know which call to reference in the XML. + static $call_count = 0; + + $call_count++; + + global $wp_xmlrpc_server; + + if ( !is_object( $wp_xmlrpc_server ) ) + return false; + + $is_multicall = false; + $multicall_count = 0; + + if ( 'system.multicall' === $wp_xmlrpc_server->message->methodName ) { + $is_multicall = true; + + if ( 0 === $call_count ) { + // Only pass along the number of entries in the multicall the first time we see it. + $multicall_count = is_countable( $wp_xmlrpc_server->message->params ) ? count( $wp_xmlrpc_server->message->params ) : 0; + } + + /* + * $wp_xmlrpc_server->message looks like this: + * + ( + [message] => + [messageType] => methodCall + [faultCode] => + [faultString] => + [methodName] => system.multicall + [params] => Array + ( + [0] => Array + ( + [methodName] => pingback.ping + [params] => Array + ( + [0] => http://www.example.net/?p=1 // Site that created the pingback. + [1] => https://www.example.com/?p=1 // Post being pingback'd on this site. + ) + ) + [1] => Array + ( + [methodName] => pingback.ping + [params] => Array + ( + [0] => http://www.example.net/?p=1 // Site that created the pingback. + [1] => https://www.example.com/?p=2 // Post being pingback'd on this site. + ) + ) + ) + ) + */ + + // Use the params from the nth pingback.ping call in the multicall. + $pingback_calls_found = 0; + + foreach ( $wp_xmlrpc_server->message->params as $xmlrpc_action ) { + if ( 'pingback.ping' === $xmlrpc_action['methodName'] ) { + $pingback_calls_found++; + } + + if ( $call_count === $pingback_calls_found ) { + $pingback_args = $xmlrpc_action['params']; + break; + } + } + } else { + /* + * $wp_xmlrpc_server->message looks like this: + * + ( + [message] => + [messageType] => methodCall + [faultCode] => + [faultString] => + [methodName] => pingback.ping + [params] => Array + ( + [0] => http://www.example.net/?p=1 // Site that created the pingback. + [1] => https://www.example.com/?p=2 // Post being pingback'd on this site. + ) + ) + */ + $pingback_args = $wp_xmlrpc_server->message->params; + } + + if ( ! empty( $pingback_args[1] ) ) { + $post_id = url_to_postid( $pingback_args[1] ); + + // If pingbacks aren't open on this post, we'll still check whether this request is part of a potential DDOS, + // but indicate to the server that pingbacks are indeed closed so we don't include this request in the user's stats, + // since the user has already done their part by disabling pingbacks. + $pingbacks_closed = false; + + $post = get_post( $post_id ); + + if ( ! $post || ! pings_open( $post ) ) { + $pingbacks_closed = true; + } + + // Note: If is_multicall is true and multicall_count=0, then we know this is at least the 2nd pingback we've processed in this multicall. + + $comment = array( + 'comment_author_url' => $pingback_args[0], + 'comment_post_ID' => $post_id, + 'comment_author' => '', + 'comment_author_email' => '', + 'comment_content' => '', + 'comment_type' => 'pingback', + 'akismet_pre_check' => '1', + 'comment_pingback_target' => $pingback_args[1], + 'pingbacks_closed' => $pingbacks_closed ? '1' : '0', + 'is_multicall' => $is_multicall, + 'multicall_count' => $multicall_count, + ); + + $comment = self::auto_check_comment( $comment, 'xml-rpc' ); + + if ( isset( $comment['akismet_result'] ) && 'true' == $comment['akismet_result'] ) { + // Sad: tightly coupled with the IXR classes. Unfortunately the action provides no context and no way to return anything. + $wp_xmlrpc_server->error( new IXR_Error( 0, 'Invalid discovery target' ) ); + + // Also note that if this was part of a multicall, a spam result will prevent the subsequent calls from being executed. + // This is probably fine, but it raises the bar for what should be acceptable as a false positive. + } + } + } + + /** + * Ensure that we are loading expected scalar values from akismet_as_submitted commentmeta. + * + * @param mixed $meta_value + * @return mixed + */ + private static function sanitize_comment_as_submitted( $meta_value ) { + if ( empty( $meta_value ) ) { + return $meta_value; + } + + $meta_value = (array) $meta_value; + + foreach ( $meta_value as $key => $value ) { + if ( ! is_scalar( $value ) ) { + unset( $meta_value[ $key ] ); + } else { + // These can change, so they're not explicitly listed in comment_as_submitted_allowed_keys. + if ( strpos( $key, 'POST_ak_' ) === 0 ) { + continue; + } + + if ( ! isset( self::$comment_as_submitted_allowed_keys[ $key ] ) ) { + unset( $meta_value[ $key ] ); + } + } + } + + return $meta_value; + } + + public static function predefined_api_key() { + if ( defined( 'WPCOM_API_KEY' ) ) { + return true; + } + + return apply_filters( 'akismet_predefined_api_key', false ); + } + + /** + * Controls the display of a privacy related notice underneath the comment form using the `akismet_comment_form_privacy_notice` option and filter respectively. + * Default is top not display the notice, leaving the choice to site admins, or integrators. + */ + public static function display_comment_form_privacy_notice() { + if ( 'display' !== apply_filters( 'akismet_comment_form_privacy_notice', get_option( 'akismet_comment_form_privacy_notice', 'hide' ) ) ) { + return; + } + echo apply_filters( + 'akismet_comment_form_privacy_notice_markup', + '<p class="akismet_comment_form_privacy_notice">' . sprintf( + __( 'This site uses Akismet to reduce spam. <a href="%s" target="_blank" rel="nofollow noopener">Learn how your comment data is processed</a>.', 'akismet' ), + 'https://akismet.com/privacy/' + ) . '</p>' + ); + } + + public static function load_form_js() { + if ( + ! is_admin() + && ( ! function_exists( 'amp_is_request' ) || ! amp_is_request() ) + && self::get_api_key() + ) { + wp_register_script( 'akismet-frontend', plugin_dir_url( __FILE__ ) . '_inc/akismet-frontend.js', array(), filemtime( plugin_dir_path( __FILE__ ) . '_inc/akismet-frontend.js' ), true ); + wp_enqueue_script( 'akismet-frontend' ); + } + } + + /** + * Add the form JavaScript when we detect that a supported form shortcode is being parsed. + */ + public static function load_form_js_via_filter( $return_value, $tag, $attr, $m ) { + if ( in_array( $tag, array( 'contact-form', 'gravityform', 'contact-form-7', 'formidable', 'fluentform' ) ) ) { + self::load_form_js(); + } + + return $return_value; + } +} |