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class.akismet.php
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<?php
class Akismet {
const API_HOST = 'rest.akismet.com';
const API_PORT = 80;
const MAX_DELAY_BEFORE_MODERATION_EMAIL = 86400; // One day in seconds
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_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments' ) );
add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments_meta' ) );
add_action( 'akismet_schedule_cron_recheck', array( 'Akismet', 'cron_recheck' ) );
/**
* 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.
*/
$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', array( 'Akismet', 'add_comment_nonce' ), 1 );
add_action( 'admin_head-edit-comments.php', array( 'Akismet', 'load_form_js' ) );
add_action( 'comment_form', array( 'Akismet', 'load_form_js' ) );
add_action( 'comment_form', array( 'Akismet', 'inject_ak_js' ) );
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_action( 'update_option_wordpress_api_key', array( 'Akismet', 'updated_option' ), 10, 2 );
}
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') );
}
public static function check_key_status( $key, $ip = null ) {
return self::http_post( Akismet::build_query( array( 'key' => $key, 'blog' => get_option( 'home' ) ) ), 'verify-key', $ip );
}
public static function verify_key( $key, $ip = null ) {
$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 ) {
$response = self::http_post( Akismet::build_query( array( 'key' => $key, 'blog' => get_option( 'home' ) ) ), '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 );
}
}
public static function auto_check_comment( $commentdata ) {
self::$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'] );
$comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt;
$response = self::http_post( Akismet::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 );
$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( $response[0]['x-akismet-error'] ) ) {
// An error occurred that we anticipated (like a suspended key) and want the user to act on.
// Send to moderation.
self::$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 ) {
// 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( esc_url_raw( $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' != $response[1] ) {
if ( !current_user_can('moderate_comments') ) {
// Comment status should be moderated
self::$last_comment_result = '0';
}
if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_single_event') ) {
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;
}
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
self::delete_old_comments();
}
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, $comment ) {
// failsafe for old WP versions
if ( !function_exists('add_comment_meta') )
return false;
if ( !isset( self::$last_comment['comment_author_email'] ) )
self::$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 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' || $comment->comment_approved == 'trash' ) {
if ( wp_blacklist_check($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 );
}
} // abnormal result: error
else {
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'] );
}
}
}
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();
foreach ( $comment_ids as $comment_id ) {
do_action( 'delete_comment', $comment_id );
}
// 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, count( $comment_ids ), '%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 ) );
clean_comment_cache( $comment_ids );
}
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 );
# enfore 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' );
}
}
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;
if ( !empty( $user_id ) )
return (int) $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 (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_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 ) {
// failsafe for old WP versions
if ( !function_exists('add_comment_meta') )
return false;
$history = get_comment_meta( $comment_id, 'akismet_history', false );
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;
// failsafe for old WP versions
if ( !function_exists('add_comment_meta') )
return false;
$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;
$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 ( isset( $c['user_ID'] ) )
$c['user_role'] = Akismet::get_user_roles($c['user_ID']);
if ( self::is_test_mode() )
$c['is_test'] = 'true';
$response = self::http_post( Akismet::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 );
delete_comment_meta( $id, 'akismet_rechecking' );
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 ) )
);
}
return $api_response;
}
public static function transition_comment_status( $new_status, $old_status, $comment ) {
if ( $new_status == $old_status )
return;
# 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;
global $current_user;
$reporter = '';
if ( is_object( $current_user ) )
$reporter = $current_user->user_login;
// 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 ( ( isset( $_POST['status'] ) && in_array( $_POST['status'], array( 'spam', 'unspam' ) ) ) ||
( isset( $_POST['spam'] ) && (int) $_POST['spam'] == 1 ) ||
( isset( $_POST['unspam'] ) && (int) $_POST['unspam'] == 1 ) ||
( isset( $_POST['comment_status'] ) && in_array( $_POST['comment_status'], array( 'spam', 'unspam' ) ) ) ||
( isset( $_GET['action'] ) && in_array( $_GET['action'], array( 'spam', 'unspam', 'spamcomment', 'unspamcomment', ) ) ) ||
( isset( $_POST['action'] ) && in_array( $_POST['action'], array( 'editedcomment' ) ) ) ||
( isset( $_GET['for'] ) && ( 'jetpack' == $_GET['for'] ) ) // Moderation via WP.com notifications/WP app/etc.
) {
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;
// 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 ( isset( $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 );
$comment->comment_post_modified_gmt = $post->post_modified_gmt;
$response = Akismet::http_post( Akismet::build_query( $comment ), 'submit-spam' );
if ( $comment->reporter ) {
self::update_comment_history( $comment_id, '', 'report-spam' );
update_comment_meta( $comment_id, 'akismet_user_result', 'true' );
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;
// 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 ( isset( $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 );
$comment->comment_post_modified_gmt = $post->post_modified_gmt;
$response = self::http_post( Akismet::build_query( $comment ), 'submit-ham' );
if ( $comment->reporter ) {
self::update_comment_history( $comment_id, '', 'report-ham' );
update_comment_meta( $comment_id, 'akismet_user_result', 'false' );
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 || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) ) {
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 ) {
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;
$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 ) {
if ( is_object( $comment ) )
$comment = (array) $comment;
return self::comments_match( self::$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 ) {
$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;
}
// 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;
}
// 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( $comment_id );
foreach ( self::$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 );
$content_length = strlen( $request );
$api_key = self::get_api_key();
$host = self::API_HOST;
if ( !empty( $api_key ) )
$host = $api_key.'.'.$host;
$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 && function_exists( 'wp_http_supports') && ( $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.