WordPress 4.1.2
[autoinstalls/wordpress.git] / wp-content / plugins / akismet / class.akismet.php
index a9ab0eaa9916090cc2cb6b5b3af22b2767fa724a..5c786526e19fb4bd1b27cbb57d6a4c746119996d 100644 (file)
@@ -23,7 +23,7 @@ class Akismet {
                self::$initiated = true;
 
                add_action( 'wp_insert_comment', array( 'Akismet', 'auto_check_update_meta' ), 10, 2 );
-               add_action( 'preprocess_comment', array( 'Akismet', 'auto_check_comment' ), 1 );
+               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' ) );
@@ -42,6 +42,9 @@ class Akismet {
                
                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' ) );
+
                if ( '3.0.5' == $GLOBALS['wp_version'] ) {
                        remove_filter( 'comment_text', 'wp_kses_data' );
                        if ( is_admin() )
@@ -161,6 +164,7 @@ class Akismet {
                        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] );
                                }
                        }
 
@@ -180,7 +184,7 @@ class Akismet {
                self::set_last_comment( $commentdata );
                self::fix_scheduled_recheck();
 
-               return self::$last_comment;
+               return $commentdata;
        }
        
        public static function get_last_comment() {
@@ -256,13 +260,31 @@ class Akismet {
        public static function delete_old_comments() {
                global $wpdb;
 
-               while( $comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_id FROM {$wpdb->comments} WHERE DATE_SUB(NOW(), INTERVAL 15 DAY) > comment_date_gmt AND comment_approved = 'spam' LIMIT %d", defined( 'AKISMET_DELETE_LIMIT' ) ? AKISMET_DELETE_LIMIT : 10000 ) ) ) {
+               /**
+                * 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();
 
-                       do_action( 'delete_comment', $comment_ids );
+                       foreach ( $comment_ids as $comment_id ) {
+                               do_action( 'delete_comment', $comment_id );
+                       }
 
                        $comma_comment_ids = implode( ', ', array_map('intval', $comment_ids) );
 
@@ -529,6 +551,7 @@ class Akismet {
                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;
                }
 
@@ -590,6 +613,7 @@ class Akismet {
 
                                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' );
@@ -598,6 +622,7 @@ class Akismet {
                $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' );
                }
        }
 
@@ -615,6 +640,7 @@ class Akismet {
                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' );
                }
        }
 
@@ -791,11 +817,71 @@ class Akismet {
                        'timeout' => 15
                );
 
-               $akismet_url = "http://{$http_host}/1.1/{$path}";
+               $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 ( is_wp_error( $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' );
+               }
 
                return array( $response['headers'], $response['body'] );
        }
@@ -926,8 +1012,77 @@ p {
                return _http_build_query( $args, '', '&' );
        }
 
+       /**
+        * Log debugging info to the error log.
+        *
+        * Enabled when WP_DEBUG_LOG is enabled, 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 ( defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG )
-                       error_log( print_r( compact( 'akismet_debug' ), 1 ) ); //send message to debug.log when in debug mode
+               if ( apply_filters( 'akismet_debug_log', defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG ) ) {
+                       error_log( print_r( compact( 'akismet_debug' ), true ) );
+               }
+       }
+
+       public static function pre_check_pingback( $method ) {
+               if ( $method !== 'pingback.ping' )
+                       return;
+
+               global $wp_xmlrpc_server;
+       
+               if ( !is_object( $wp_xmlrpc_server ) )
+                       return false;
+       
+               // Lame: tightly coupled with the IXR class.
+               $args = $wp_xmlrpc_server->message->params;
+       
+               if ( !empty( $args[1] ) ) {
+                       $post_id = url_to_postid( $args[1] );
+
+                       // If this gets through the pre-check, make sure we properly identify the outbound request as a pingback verification
+                       Akismet::pingback_forwarded_for( null, $args[0] );
+                       add_filter( 'http_request_args', array( 'Akismet', 'pingback_forwarded_for' ), 10, 2 );
+
+                       $comment = array(
+                               'comment_author_url' => $args[0],
+                               'comment_post_ID' => $post_id,
+                               'comment_author' => '',
+                               'comment_author_email' => '',
+                               'comment_content' => '',
+                               'comment_type' => 'pingback',
+                               'akismet_pre_check' => '1',
+                               'comment_pingback_target' => $args[1],
+                       );
+
+                       $comment = Akismet::auto_check_comment( $comment );
+
+                       if ( isset( $comment['akismet_result'] ) && 'true' == $comment['akismet_result'] ) {
+                               // Lame: 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' ) );
+                       }
+               }
+       }
+       
+       public static function pingback_forwarded_for( $r, $url ) {
+               static $urls = array();
+       
+               // Call this with $r == null to prime the callback to add headers on a specific URL
+               if ( is_null( $r ) && !in_array( $url, $urls ) ) {
+                       $urls[] = $url;
+               }
+
+               // Add X-Pingback-Forwarded-For header, but only for requests to a specific URL (the apparent pingback source)
+               if ( is_array( $r ) && is_array( $r['headers'] ) && !isset( $r['headers']['X-Pingback-Forwarded-For'] ) && in_array( $url, $urls ) ) {
+                       $remote_ip = preg_replace( '/[^a-fx0-9:.,]/i', '', $_SERVER['REMOTE_ADDR'] );
+               
+                       // Note: this assumes REMOTE_ADDR is correct, and it may not be if a reverse proxy or CDN is in use
+                       $r['headers']['X-Pingback-Forwarded-For'] = $remote_ip;
+
+                       // Also identify the request as a pingback verification in the UA string so it appears in logs
+                       $r['user-agent'] .= '; verifying pingback from ' . $remote_ip;
+               }
+
+               return $r;
        }
 }
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