wp-content/plugins/akismet/class.akismet.php

   1 <?php
   2
   3 class Akismet {
   4         const API_HOST = 'rest.akismet.com';
   5         const API_PORT = 80;
   6         const MAX_DELAY_BEFORE_MODERATION_EMAIL = 86400; // One day in seconds
   7
   8         private static $last_comment = '';
   9         private static $initiated = false;
  10         private static $prevent_moderation_email_for_these_comments = array();
  11         private static $last_comment_result = null;
  12         private static $comment_as_submitted_allowed_keys = array( 'blog' => '', 'blog_charset' => '', 'blog_lang' => '', 'blog_ua' => '', 'comment_agent' => '', 'comment_author' => '', 'comment_author_IP' => '', 'comment_author_email' => '', 'comment_author_url' => '', 'comment_content' => '', 'comment_date_gmt' => '', 'comment_tags' => '', 'comment_type' => '', 'guid' => '', 'is_test' => '', 'permalink' => '', 'reporter' => '', 'site_domain' => '', 'submit_referer' => '', 'submit_uri' => '', 'user_ID' => '', 'user_agent' => '', 'user_id' => '', 'user_ip' => '' );
  13
  14         public static function init() {
  15                 if ( ! self::$initiated ) {
  16                         self::init_hooks();
  17                 }
  18         }
  19
  20         /**
  21          * Initializes WordPress hooks
  22          */
  23         private static function init_hooks() {
  24                 self::$initiated = true;
  25
  26                 add_action( 'wp_insert_comment', array( 'Akismet', 'auto_check_update_meta' ), 10, 2 );
  27                 add_filter( 'preprocess_comment', array( 'Akismet', 'auto_check_comment' ), 1 );
  28                 add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments' ) );
  29                 add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments_meta' ) );
  30                 add_action( 'akismet_schedule_cron_recheck', array( 'Akismet', 'cron_recheck' ) );
  31
  32                 /**
  33                  * To disable the Akismet comment nonce, add a filter for the 'akismet_comment_nonce' tag
  34                  * and return any string value that is not 'true' or '' (empty string).
  35                  *
  36                  * Don't return boolean false, because that implies that the 'akismet_comment_nonce' option
  37                  * has not been set and that Akismet should just choose the default behavior for that
  38                  * situation.
  39                  */
  40                 $akismet_comment_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
  41
  42                 if ( $akismet_comment_nonce_option == 'true' || $akismet_comment_nonce_option == '' )
  43                         add_action( 'comment_form',  array( 'Akismet',  'add_comment_nonce' ), 1 );
  44
  45                 add_action( 'admin_head-edit-comments.php', array( 'Akismet', 'load_form_js' ) );
  46                 add_action( 'comment_form', array( 'Akismet', 'load_form_js' ) );
  47                 add_action( 'comment_form', array( 'Akismet', 'inject_ak_js' ) );
  48
  49                 add_filter( 'comment_moderation_recipients', array( 'Akismet', 'disable_moderation_emails_if_unreachable' ), 1000, 2 );
  50                 add_filter( 'pre_comment_approved', array( 'Akismet', 'last_comment_status' ), 10, 2 );
  51
  52                 add_action( 'transition_comment_status', array( 'Akismet', 'transition_comment_status' ), 10, 3 );
  53
  54                 // Run this early in the pingback call, before doing a remote fetch of the source uri
  55                 add_action( 'xmlrpc_call', array( 'Akismet', 'pre_check_pingback' ) );
  56
  57                 // Jetpack compatibility
  58                 add_filter( 'jetpack_options_whitelist', array( 'Akismet', 'add_to_jetpack_options_whitelist' ) );
  59                 add_action( 'update_option_wordpress_api_key', array( 'Akismet', 'updated_option' ), 10, 2 );
  60         }
  61
  62         public static function get_api_key() {
  63                 return apply_filters( 'akismet_get_api_key', defined('WPCOM_API_KEY') ? constant('WPCOM_API_KEY') : get_option('wordpress_api_key') );
  64         }
  65
  66         public static function check_key_status( $key, $ip = null ) {
  67                 return self::http_post( Akismet::build_query( array( 'key' => $key, 'blog' => get_option('home') ) ), 'verify-key', $ip );
  68         }
  69
  70         public static function verify_key( $key, $ip = null ) {
  71                 $response = self::check_key_status( $key, $ip );
  72
  73                 if ( $response[1] != 'valid' && $response[1] != 'invalid' )
  74                         return 'failed';
  75
  76                 return $response[1];
  77         }
  78
  79         public static function deactivate_key( $key ) {
  80                 $response = self::http_post( Akismet::build_query( array( 'key' => $key, 'blog' => get_option('home') ) ), 'deactivate' );
  81
  82                 if ( $response[1] != 'deactivated' )
  83                         return 'failed';
  84
  85                 return $response[1];
  86         }
  87
  88         /**
  89          * Add the akismet option to the Jetpack options management whitelist.
  90          *
  91          * @param array $options The list of whitelisted option names.
  92          * @return array The updated whitelist
  93          */
  94         public static function add_to_jetpack_options_whitelist( $options ) {
  95                 $options[] = 'wordpress_api_key';
  96                 return $options;
  97         }
  98
  99         /**
 100          * When the akismet option is updated, run the registration call.
 101          *
 102          * This should only be run when the option is updated from the Jetpack/WP.com
 103          * API call, and only if the new key is different than the old key.
 104          *
 105          * @param mixed  $old_value   The old option value.
 106          * @param mixed  $value       The new option value.
 107          */
 108         public static function updated_option( $old_value, $value ) {
 109                 // Not an API call
 110                 if ( ! class_exists( 'WPCOM_JSON_API_Update_Option_Endpoint' ) ) {
 111                         return;
 112                 }
 113                 // Only run the registration if the old key is different.
 114                 if ( $old_value !== $value ) {
 115                         self::verify_key( $value );
 116                 }
 117         }
 118
 119         public static function auto_check_comment( $commentdata ) {
 120                 self::$last_comment_result = null;
 121
 122                 $comment = $commentdata;
 123
 124                 $comment['user_ip']      = self::get_ip_address();
 125                 $comment['user_agent']   = self::get_user_agent();
 126                 $comment['referrer']     = self::get_referer();
 127                 $comment['blog']         = get_option('home');
 128                 $comment['blog_lang']    = get_locale();
 129                 $comment['blog_charset'] = get_option('blog_charset');
 130                 $comment['permalink']    = get_permalink( $comment['comment_post_ID'] );
 131
 132                 if ( !empty( $comment['user_ID'] ) )
 133                         $comment['user_role'] = Akismet::get_user_roles( $comment['user_ID'] );
 134
 135                 /** See filter documentation in init_hooks(). */
 136                 $akismet_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
 137                 $comment['akismet_comment_nonce'] = 'inactive';
 138                 if ( $akismet_nonce_option == 'true' || $akismet_nonce_option == '' ) {
 139                         $comment['akismet_comment_nonce'] = 'failed';
 140                         if ( isset( $_POST['akismet_comment_nonce'] ) && wp_verify_nonce( $_POST['akismet_comment_nonce'], 'akismet_comment_nonce_' . $comment['comment_post_ID'] ) )
 141                                 $comment['akismet_comment_nonce'] = 'passed';
 142
 143                         // comment reply in wp-admin
 144                         if ( isset( $_POST['_ajax_nonce-replyto-comment'] ) && check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment' ) )
 145                                 $comment['akismet_comment_nonce'] = 'passed';
 146
 147                 }
 148
 149                 if ( self::is_test_mode() )
 150                         $comment['is_test'] = 'true';
 151
 152                 foreach( $_POST as $key => $value ) {
 153                         if ( is_string( $value ) )
 154                                 $comment["POST_{$key}"] = $value;
 155                 }
 156
 157                 foreach ( $_SERVER as $key => $value ) {
 158                         if ( ! is_string( $value ) ) {
 159                                 continue;
 160                         }
 161
 162                         if ( preg_match( "/^HTTP_COOKIE/", $key ) ) {
 163                                 continue;
 164                         }
 165
 166                         // Send any potentially useful $_SERVER vars, but avoid sending junk we don't need.
 167                         if ( preg_match( "/^(HTTP_|REMOTE_ADDR|REQUEST_URI|DOCUMENT_URI)/", $key ) ) {
 168                                 $comment[ "$key" ] = $value;
 169                         }
 170                 }
 171
 172                 $post = get_post( $comment['comment_post_ID'] );
 173                 $comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt;
 174
 175                 $response = self::http_post( Akismet::build_query( $comment ), 'comment-check' );
 176
 177                 do_action( 'akismet_comment_check_response', $response );
 178
 179                 $commentdata['comment_as_submitted'] = array_intersect_key( $comment, self::$comment_as_submitted_allowed_keys );
 180                 $commentdata['akismet_result']       = $response[1];
 181
 182                 if ( isset( $response[0]['x-akismet-pro-tip'] ) )
 183                 $commentdata['akismet_pro_tip'] = $response[0]['x-akismet-pro-tip'];
 184
 185                 if ( isset( $response[0]['x-akismet-error'] ) ) {
 186                         // An error occurred that we anticipated (like a suspended key) and want the user to act on.
 187                         // Send to moderation.
 188                         self::$last_comment_result = '0';
 189                 }
 190                 else if ( 'true' == $response[1] ) {
 191                         // akismet_spam_count will be incremented later by comment_is_spam()
 192                         self::$last_comment_result = 'spam';
 193
 194                         $discard = ( isset( $commentdata['akismet_pro_tip'] ) && $commentdata['akismet_pro_tip'] === 'discard' && self::allow_discard() );
 195
 196                         do_action( 'akismet_spam_caught', $discard );
 197
 198                         if ( $discard ) {
 199                                 // akismet_result_spam() won't be called so bump the counter here
 200                                 if ( $incr = apply_filters('akismet_spam_count_incr', 1) )
 201                                         update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr );
 202                                 $redirect_to = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : get_permalink( $post );
 203                                 wp_safe_redirect( esc_url_raw( $redirect_to ) );
 204                                 die();
 205                         }
 206                 }
 207
 208                 // if the response is neither true nor false, hold the comment for moderation and schedule a recheck
 209                 if ( 'true' != $response[1] && 'false' != $response[1] ) {
 210                         if ( !current_user_can('moderate_comments') ) {
 211                                 // Comment status should be moderated
 212                                 self::$last_comment_result = '0';
 213                         }
 214                         if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_single_event') ) {
 215                                 if ( !wp_next_scheduled( 'akismet_schedule_cron_recheck' ) ) {
 216                                         wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
 217                                         do_action( 'akismet_scheduled_recheck', 'invalid-response-' . $response[1] );
 218                                 }
 219                         }
 220
 221                         self::$prevent_moderation_email_for_these_comments[] = $commentdata;
 222                 }
 223
 224                 if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_event') ) {
 225                         // WP 2.1+: delete old comments daily
 226                         if ( !wp_next_scheduled( 'akismet_scheduled_delete' ) )
 227                                 wp_schedule_event( time(), 'daily', 'akismet_scheduled_delete' );
 228                 }
 229                 elseif ( (mt_rand(1, 10) == 3) ) {
 230                         // WP 2.0: run this one time in ten
 231                         self::delete_old_comments();
 232                 }
 233
 234                 self::set_last_comment( $commentdata );
 235                 self::fix_scheduled_recheck();
 236
 237                 return $commentdata;
 238         }
 239
 240         public static function get_last_comment() {
 241                 return self::$last_comment;
 242         }
 243
 244         public static function set_last_comment( $comment ) {
 245                 if ( is_null( $comment ) ) {
 246                         self::$last_comment = null;
 247                 }
 248                 else {
 249                         // We filter it here so that it matches the filtered comment data that we'll have to compare against later.
 250                         // wp_filter_comment expects comment_author_IP
 251                         self::$last_comment = wp_filter_comment(
 252                                 array_merge(
 253                                         array( 'comment_author_IP' => self::get_ip_address() ),
 254                                         $comment
 255                                 )
 256                         );
 257                 }
 258         }
 259
 260         // this fires on wp_insert_comment.  we can't update comment_meta when auto_check_comment() runs
 261         // because we don't know the comment ID at that point.
 262         public static function auto_check_update_meta( $id, $comment ) {
 263
 264                 // failsafe for old WP versions
 265                 if ( !function_exists('add_comment_meta') )
 266                         return false;
 267
 268                 if ( !isset( self::$last_comment['comment_author_email'] ) )
 269                         self::$last_comment['comment_author_email'] = '';
 270
 271                 // wp_insert_comment() might be called in other contexts, so make sure this is the same comment
 272                 // as was checked by auto_check_comment
 273                 if ( is_object( $comment ) && !empty( self::$last_comment ) && is_array( self::$last_comment ) ) {
 274                         if ( self::matches_last_comment( $comment ) ) {
 275
 276                                         load_plugin_textdomain( 'akismet' );
 277
 278                                         // normal result: true or false
 279                                         if ( self::$last_comment['akismet_result'] == 'true' ) {
 280                                                 update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' );
 281                                                 self::update_comment_history( $comment->comment_ID, '', 'check-spam' );
 282                                                 if ( $comment->comment_approved != 'spam' )
 283                                                         self::update_comment_history(
 284                                                                 $comment->comment_ID,
 285                                                                 '',
 286                                                                 'status-changed-'.$comment->comment_approved
 287                                                         );
 288                                         }
 289                                         elseif ( self::$last_comment['akismet_result'] == 'false' ) {
 290                                                 update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' );
 291                                                 self::update_comment_history( $comment->comment_ID, '', 'check-ham' );
 292                                                 // Status could be spam or trash, depending on the WP version and whether this change applies:
 293                                                 // https://core.trac.wordpress.org/changeset/34726
 294                                                 if ( $comment->comment_approved == 'spam' || $comment->comment_approved == 'trash' ) {
 295                                                         if ( wp_blacklist_check($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent) )
 296                                                                 self::update_comment_history( $comment->comment_ID, '', 'wp-blacklisted' );
 297                                                         else
 298                                                                 self::update_comment_history( $comment->comment_ID, '', 'status-changed-'.$comment->comment_approved );
 299                                                 }
 300                                         } // abnormal result: error
 301                                         else {
 302                                                 update_comment_meta( $comment->comment_ID, 'akismet_error', time() );
 303                                                 self::update_comment_history(
 304                                                         $comment->comment_ID,
 305                                                         '',
 306                                                         'check-error',
 307                                                         array( 'response' => substr( self::$last_comment['akismet_result'], 0, 50 ) )
 308                                                 );
 309                                         }
 310
 311                                         // record the complete original data as submitted for checking
 312                                         if ( isset( self::$last_comment['comment_as_submitted'] ) )
 313                                                 update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', self::$last_comment['comment_as_submitted'] );
 314
 315                                         if ( isset( self::$last_comment['akismet_pro_tip'] ) )
 316                                                 update_comment_meta( $comment->comment_ID, 'akismet_pro_tip', self::$last_comment['akismet_pro_tip'] );
 317                         }
 318                 }
 319         }
 320
 321         public static function delete_old_comments() {
 322                 global $wpdb;
 323
 324                 /**
 325                  * Determines how many comments will be deleted in each batch.
 326                  *
 327                  * @param int The default, as defined by AKISMET_DELETE_LIMIT.
 328                  */
 329                 $delete_limit = apply_filters( 'akismet_delete_comment_limit', defined( 'AKISMET_DELETE_LIMIT' ) ? AKISMET_DELETE_LIMIT : 10000 );
 330                 $delete_limit = max( 1, intval( $delete_limit ) );
 331
 332                 /**
 333                  * Determines how many days a comment will be left in the Spam queue before being deleted.
 334                  *
 335                  * @param int The default number of days.
 336                  */
 337                 $delete_interval = apply_filters( 'akismet_delete_comment_interval', 15 );
 338                 $delete_interval = max( 1, intval( $delete_interval ) );
 339
 340                 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 ) ) ) {
 341                         if ( empty( $comment_ids ) )
 342                                 return;
 343
 344                         $wpdb->queries = array();
 345
 346                         foreach ( $comment_ids as $comment_id ) {
 347                                 do_action( 'delete_comment', $comment_id );
 348                         }
 349
 350                         $comma_comment_ids = implode( ', ', array_map('intval', $comment_ids) );
 351
 352                         $wpdb->query("DELETE FROM {$wpdb->comments} WHERE comment_id IN ( $comma_comment_ids )");
 353                         $wpdb->query("DELETE FROM {$wpdb->commentmeta} WHERE comment_id IN ( $comma_comment_ids )");
 354
 355                         clean_comment_cache( $comment_ids );
 356                 }
 357
 358                 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->comments ) ) // lucky number
 359                         $wpdb->query("OPTIMIZE TABLE {$wpdb->comments}");
 360         }
 361
 362         public static function delete_old_comments_meta() {
 363                 global $wpdb;
 364
 365                 $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 );
 366
 367                 # enfore a minimum of 1 day
 368                 $interval = absint( $interval );
 369                 if ( $interval < 1 )
 370                         $interval = 1;
 371
 372                 // akismet_as_submitted meta values are large, so expire them
 373                 // after $interval days regardless of the comment status
 374                 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 ) ) ) {
 375                         if ( empty( $comment_ids ) )
 376                                 return;
 377
 378                         $wpdb->queries = array();
 379
 380                         foreach ( $comment_ids as $comment_id ) {
 381                                 delete_comment_meta( $comment_id, 'akismet_as_submitted' );
 382                         }
 383                 }
 384
 385                 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number
 386                         $wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}");
 387         }
 388
 389         // how many approved comments does this author have?
 390         public static function get_user_comments_approved( $user_id, $comment_author_email, $comment_author, $comment_author_url ) {
 391                 global $wpdb;
 392
 393                 if ( !empty( $user_id ) )
 394                         return (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->comments} WHERE user_id = %d AND comment_approved = 1", $user_id ) );
 395
 396                 if ( !empty( $comment_author_email ) )
 397                         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 ) );
 398
 399                 return 0;
 400         }
 401
 402         // get the full comment history for a given comment, as an array in reverse chronological order
 403         public static function get_comment_history( $comment_id ) {
 404
 405                 // failsafe for old WP versions
 406                 if ( !function_exists('add_comment_meta') )
 407                         return false;
 408
 409                 $history = get_comment_meta( $comment_id, 'akismet_history', false );
 410                 usort( $history, array( 'Akismet', '_cmp_time' ) );
 411                 return $history;
 412         }
 413
 414         /**
 415          * Log an event for a given comment, storing it in comment_meta.
 416          *
 417          * @param int $comment_id The ID of the relevant comment.
 418          * @param string $message The string description of the event. No longer used.
 419          * @param string $event The event code.
 420          * @param array $meta Metadata about the history entry. e.g., the user that reported or changed the status of a given comment.
 421          */
 422         public static function update_comment_history( $comment_id, $message, $event=null, $meta=null ) {
 423                 global $current_user;
 424
 425                 // failsafe for old WP versions
 426                 if ( !function_exists('add_comment_meta') )
 427                         return false;
 428
 429                 $user = '';
 430
 431                 $event = array(
 432                         'time'    => self::_get_microtime(),
 433                         'event'   => $event,
 434                 );
 435
 436                 if ( is_object( $current_user ) && isset( $current_user->user_login ) ) {
 437                         $event['user'] = $current_user->user_login;
 438                 }
 439
 440                 if ( ! empty( $meta ) ) {
 441                         $event['meta'] = $meta;
 442                 }
 443
 444                 // $unique = false so as to allow multiple values per comment
 445                 $r = add_comment_meta( $comment_id, 'akismet_history', $event, false );
 446         }
 447
 448         public static function check_db_comment( $id, $recheck_reason = 'recheck_queue' ) {
 449                 global $wpdb;
 450
 451                 $c = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $id ), ARRAY_A );
 452                 if ( !$c )
 453                         return;
 454
 455                 $c['user_ip']        = $c['comment_author_IP'];
 456                 $c['user_agent']     = $c['comment_agent'];
 457                 $c['referrer']       = '';
 458                 $c['blog']           = get_option('home');
 459                 $c['blog_lang']      = get_locale();
 460                 $c['blog_charset']   = get_option('blog_charset');
 461                 $c['permalink']      = get_permalink($c['comment_post_ID']);
 462                 $c['recheck_reason'] = $recheck_reason;
 463
 464                 if ( self::is_test_mode() )
 465                         $c['is_test'] = 'true';
 466
 467                 $response = self::http_post( Akismet::build_query( $c ), 'comment-check' );
 468
 469                 return ( is_array( $response ) && ! empty( $response[1] ) ) ? $response[1] : false;
 470         }
 471
 472
 473
 474         public static function transition_comment_status( $new_status, $old_status, $comment ) {
 475
 476                 if ( $new_status == $old_status )
 477                         return;
 478
 479                 # we don't need to record a history item for deleted comments
 480                 if ( $new_status == 'delete' )
 481                         return;
 482
 483                 if ( !current_user_can( 'edit_post', $comment->comment_post_ID ) && !current_user_can( 'moderate_comments' ) )
 484                         return;
 485
 486                 if ( defined('WP_IMPORTING') && WP_IMPORTING == true )
 487                         return;
 488
 489                 // if this is present, it means the status has been changed by a re-check, not an explicit user action
 490                 if ( get_comment_meta( $comment->comment_ID, 'akismet_rechecking' ) )
 491                         return;
 492
 493                 global $current_user;
 494                 $reporter = '';
 495                 if ( is_object( $current_user ) )
 496                         $reporter = $current_user->user_login;
 497
 498                 // Assumption alert:
 499                 // We want to submit comments to Akismet only when a moderator explicitly spams or approves it - not if the status
 500                 // is changed automatically by another plugin.  Unfortunately WordPress doesn't provide an unambiguous way to
 501                 // determine why the transition_comment_status action was triggered.  And there are several different ways by which
 502                 // to spam and unspam comments: bulk actions, ajax, links in moderation emails, the dashboard, and perhaps others.
 503                 // We'll assume that this is an explicit user action if certain POST/GET variables exist.
 504                 if ( ( isset( $_POST['status'] ) && in_array( $_POST['status'], array( 'spam', 'unspam' ) ) ) ||
 505                          ( isset( $_POST['spam'] )   && (int) $_POST['spam'] == 1 ) ||
 506                          ( isset( $_POST['unspam'] ) && (int) $_POST['unspam'] == 1 ) ||
 507                          ( isset( $_POST['comment_status'] )  && in_array( $_POST['comment_status'], array( 'spam', 'unspam' ) ) ) ||
 508                          ( isset( $_GET['action'] )  && in_array( $_GET['action'], array( 'spam', 'unspam', 'spamcomment', 'unspamcomment', ) ) ) ||
 509                          ( isset( $_POST['action'] ) && in_array( $_POST['action'], array( 'editedcomment' ) ) ) ||
 510                          ( isset( $_GET['for'] ) && ( 'jetpack' == $_GET['for'] ) ) // Moderation via WP.com notifications/WP app/etc.
 511                  ) {
 512                         if ( $new_status == 'spam' && ( $old_status == 'approved' || $old_status == 'unapproved' || !$old_status ) ) {
 513                                 return self::submit_spam_comment( $comment->comment_ID );
 514                         } elseif ( $old_status == 'spam' && ( $new_status == 'approved' || $new_status == 'unapproved' ) ) {
 515                                 return self::submit_nonspam_comment( $comment->comment_ID );
 516                         }
 517                 }
 518
 519                 self::update_comment_history( $comment->comment_ID, '', 'status-' . $new_status );
 520         }
 521
 522         public static function submit_spam_comment( $comment_id ) {
 523                 global $wpdb, $current_user, $current_site;
 524
 525                 $comment_id = (int) $comment_id;
 526
 527                 $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) );
 528
 529                 if ( !$comment ) // it was deleted
 530                         return;
 531
 532                 if ( 'spam' != $comment->comment_approved )
 533                         return;
 534
 535                 // use the original version stored in comment_meta if available
 536                 $as_submitted = self::sanitize_comment_as_submitted( get_comment_meta( $comment_id, 'akismet_as_submitted', true ) );
 537
 538                 if ( $as_submitted && is_array( $as_submitted ) && isset( $as_submitted['comment_content'] ) )
 539                         $comment = (object) array_merge( (array)$comment, $as_submitted );
 540
 541                 $comment->blog         = get_bloginfo('url');
 542                 $comment->blog_lang    = get_locale();
 543                 $comment->blog_charset = get_option('blog_charset');
 544                 $comment->permalink    = get_permalink($comment->comment_post_ID);
 545
 546                 if ( is_object($current_user) )
 547                         $comment->reporter = $current_user->user_login;
 548
 549                 if ( is_object($current_site) )
 550                         $comment->site_domain = $current_site->domain;
 551
 552                 $comment->user_role = '';
 553                 if ( isset( $comment->user_ID ) )
 554                         $comment->user_role = Akismet::get_user_roles( $comment->user_ID );
 555
 556                 if ( self::is_test_mode() )
 557                         $comment->is_test = 'true';
 558
 559                 $post = get_post( $comment->comment_post_ID );
 560                 $comment->comment_post_modified_gmt = $post->post_modified_gmt;
 561
 562                 $response = Akismet::http_post( Akismet::build_query( $comment ), 'submit-spam' );
 563                 if ( $comment->reporter ) {
 564                         self::update_comment_history( $comment_id, '', 'report-spam' );
 565                         update_comment_meta( $comment_id, 'akismet_user_result', 'true' );
 566                         update_comment_meta( $comment_id, 'akismet_user', $comment->reporter );
 567                 }
 568
 569                 do_action('akismet_submit_spam_comment', $comment_id, $response[1]);
 570         }
 571
 572         public static function submit_nonspam_comment( $comment_id ) {
 573                 global $wpdb, $current_user, $current_site;
 574
 575                 $comment_id = (int) $comment_id;
 576
 577                 $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) );
 578                 if ( !$comment ) // it was deleted
 579                         return;
 580
 581                 // use the original version stored in comment_meta if available
 582                 $as_submitted = self::sanitize_comment_as_submitted( get_comment_meta( $comment_id, 'akismet_as_submitted', true ) );
 583
 584                 if ( $as_submitted && is_array($as_submitted) && isset($as_submitted['comment_content']) )
 585                         $comment = (object) array_merge( (array)$comment, $as_submitted );
 586
 587                 $comment->blog         = get_bloginfo('url');
 588                 $comment->blog_lang    = get_locale();
 589                 $comment->blog_charset = get_option('blog_charset');
 590                 $comment->permalink    = get_permalink( $comment->comment_post_ID );
 591                 $comment->user_role    = '';
 592
 593                 if ( is_object($current_user) )
 594                         $comment->reporter = $current_user->user_login;
 595
 596                 if ( is_object($current_site) )
 597                         $comment->site_domain = $current_site->domain;
 598
 599                 if ( isset( $comment->user_ID ) )
 600                         $comment->user_role = Akismet::get_user_roles($comment->user_ID);
 601
 602                 if ( Akismet::is_test_mode() )
 603                         $comment->is_test = 'true';
 604
 605                 $post = get_post( $comment->comment_post_ID );
 606                 $comment->comment_post_modified_gmt = $post->post_modified_gmt;
 607
 608                 $response = self::http_post( Akismet::build_query( $comment ), 'submit-ham' );
 609                 if ( $comment->reporter ) {
 610                         self::update_comment_history( $comment_id, '', 'report-ham' );
 611                         update_comment_meta( $comment_id, 'akismet_user_result', 'false' );
 612                         update_comment_meta( $comment_id, 'akismet_user', $comment->reporter );
 613                 }
 614
 615                 do_action('akismet_submit_nonspam_comment', $comment_id, $response[1]);
 616         }
 617
 618         public static function cron_recheck() {
 619                 global $wpdb;
 620
 621                 $api_key = self::get_api_key();
 622
 623                 $status = self::verify_key( $api_key );
 624                 if ( get_option( 'akismet_alert_code' ) || $status == 'invalid' ) {
 625                         // since there is currently a problem with the key, reschedule a check for 6 hours hence
 626                         wp_schedule_single_event( time() + 21600, 'akismet_schedule_cron_recheck' );
 627                         do_action( 'akismet_scheduled_recheck', 'key-problem-' . get_option( 'akismet_alert_code' ) . '-' . $status );
 628                         return false;
 629                 }
 630
 631                 delete_option('akismet_available_servers');
 632
 633                 $comment_errors = $wpdb->get_col( "SELECT comment_id FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error' LIMIT 100" );
 634
 635                 load_plugin_textdomain( 'akismet' );
 636
 637                 foreach ( (array) $comment_errors as $comment_id ) {
 638                         // if the comment no longer exists, or is too old, remove the meta entry from the queue to avoid getting stuck
 639                         $comment = get_comment( $comment_id );
 640                         if ( !$comment || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) ) {
 641                                 delete_comment_meta( $comment_id, 'akismet_error' );
 642                                 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
 643                                 continue;
 644                         }
 645
 646                         add_comment_meta( $comment_id, 'akismet_rechecking', true );
 647                         $status = self::check_db_comment( $comment_id, 'retry' );
 648
 649                         $event = '';
 650                         if ( $status == 'true' ) {
 651                                 $event = 'cron-retry-spam';
 652                         } elseif ( $status == 'false' ) {
 653                                 $event = 'cron-retry-ham';
 654                         }
 655
 656                         // If we got back a legit response then update the comment history
 657                         // other wise just bail now and try again later.  No point in
 658                         // re-trying all the comments once we hit one failure.
 659                         if ( !empty( $event ) ) {
 660                                 delete_comment_meta( $comment_id, 'akismet_error' );
 661                                 self::update_comment_history( $comment_id, '', $event );
 662                                 update_comment_meta( $comment_id, 'akismet_result', $status );
 663                                 // make sure the comment status is still pending.  if it isn't, that means the user has already moved it elsewhere.
 664                                 $comment = get_comment( $comment_id );
 665                                 if ( $comment && 'unapproved' == wp_get_comment_status( $comment_id ) ) {
 666                                         if ( $status == 'true' ) {
 667                                                 wp_spam_comment( $comment_id );
 668                                         } elseif ( $status == 'false' ) {
 669                                                 // comment is good, but it's still in the pending queue.  depending on the moderation settings
 670                                                 // we may need to change it to approved.
 671                                                 if ( check_comment($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent, $comment->comment_type) )
 672                                                         wp_set_comment_status( $comment_id, 1 );
 673                                                 else if ( get_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ) )
 674                                                         wp_notify_moderator( $comment_id );
 675                                         }
 676                                 }
 677
 678                                 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
 679                         } else {
 680                                 // If this comment has been pending moderation for longer than MAX_DELAY_BEFORE_MODERATION_EMAIL,
 681                                 // send a moderation email now.
 682                                 if ( ( intval( gmdate( 'U' ) ) - strtotime( $comment->comment_date_gmt ) ) < self::MAX_DELAY_BEFORE_MODERATION_EMAIL ) {
 683                                         delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' );
 684                                         wp_notify_moderator( $comment_id );
 685                                 }
 686
 687                                 delete_comment_meta( $comment_id, 'akismet_rechecking' );
 688                                 wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
 689                                 do_action( 'akismet_scheduled_recheck', 'check-db-comment-' . $status );
 690                                 return;
 691                         }
 692                         delete_comment_meta( $comment_id, 'akismet_rechecking' );
 693                 }
 694
 695                 $remaining = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error'" );
 696                 if ( $remaining && !wp_next_scheduled('akismet_schedule_cron_recheck') ) {
 697                         wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
 698                         do_action( 'akismet_scheduled_recheck', 'remaining' );
 699                 }
 700         }
 701
 702         public static function fix_scheduled_recheck() {
 703                 $future_check = wp_next_scheduled( 'akismet_schedule_cron_recheck' );
 704                 if ( !$future_check ) {
 705                         return;
 706                 }
 707
 708                 if ( get_option( 'akismet_alert_code' ) > 0 ) {
 709                         return;
 710                 }
 711
 712                 $check_range = time() + 1200;
 713                 if ( $future_check > $check_range ) {
 714                         wp_clear_scheduled_hook( 'akismet_schedule_cron_recheck' );
 715                         wp_schedule_single_event( time() + 300, 'akismet_schedule_cron_recheck' );
 716                         do_action( 'akismet_scheduled_recheck', 'fix-scheduled-recheck' );
 717                 }
 718         }
 719
 720         public static function add_comment_nonce( $post_id ) {
 721                 echo '<p style="display: none;">';
 722                 wp_nonce_field( 'akismet_comment_nonce_' . $post_id, 'akismet_comment_nonce', FALSE );
 723                 echo '</p>';
 724         }
 725
 726         public static function is_test_mode() {
 727                 return defined('AKISMET_TEST_MODE') && AKISMET_TEST_MODE;
 728         }
 729
 730         public static function allow_discard() {
 731                 if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
 732                         return false;
 733                 if ( is_user_logged_in() )
 734                         return false;
 735
 736                 return ( get_option( 'akismet_strictness' ) === '1'  );
 737         }
 738
 739         public static function get_ip_address() {
 740                 return isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : null;
 741         }
 742
 743         /**
 744          * Do these two comments, without checking the comment_ID, "match"?
 745          *
 746          * @param mixed $comment1 A comment object or array.
 747          * @param mixed $comment2 A comment object or array.
 748          * @return bool Whether the two comments should be treated as the same comment.
 749          */
 750         private static function comments_match( $comment1, $comment2 ) {
 751                 $comment1 = (array) $comment1;
 752                 $comment2 = (array) $comment2;
 753
 754                 $comments_match = (
 755                            isset( $comment1['comment_post_ID'], $comment2['comment_post_ID'] )
 756                         && intval( $comment1['comment_post_ID'] ) == intval( $comment2['comment_post_ID'] )
 757                         && (
 758                                 // The comment author length max is 255 characters, limited by the TINYTEXT column type.
 759                                 // If the comment author includes multibyte characters right around the 255-byte mark, they
 760                                 // may be stripped when the author is saved in the DB, so a 300+ char author may turn into
 761                                 // a 253-char author when it's saved, not 255 exactly.  The longest possible character is
 762                                 // theoretically 6 bytes, so we'll only look at the first 248 bytes to be safe.
 763                                 substr( $comment1['comment_author'], 0, 248 ) == substr( $comment2['comment_author'], 0, 248 )
 764                                 || substr( stripslashes( $comment1['comment_author'] ), 0, 248 ) == substr( $comment2['comment_author'], 0, 248 )
 765                                 || substr( $comment1['comment_author'], 0, 248 ) == substr( stripslashes( $comment2['comment_author'] ), 0, 248 )
 766                                 // Certain long comment author names will be truncated to nothing, depending on their encoding.
 767                                 || ( ! $comment1['comment_author'] && strlen( $comment2['comment_author'] ) > 248 )
 768                                 || ( ! $comment2['comment_author'] && strlen( $comment1['comment_author'] ) > 248 )
 769                                 )
 770                         && (
 771                                 // The email max length is 100 characters, limited by the VARCHAR(100) column type.
 772                                 // Same argument as above for only looking at the first 93 characters.
 773                                 substr( $comment1['comment_author_email'], 0, 93 ) == substr( $comment2['comment_author_email'], 0, 93 )
 774                                 || substr( stripslashes( $comment1['comment_author_email'] ), 0, 93 ) == substr( $comment2['comment_author_email'], 0, 93 )
 775                                 || substr( $comment1['comment_author_email'], 0, 93 ) == substr( stripslashes( $comment2['comment_author_email'] ), 0, 93 )
 776                                 // Very long emails can be truncated and then stripped if the [0:100] substring isn't a valid address.
 777                                 || ( ! $comment1['comment_author_email'] && strlen( $comment2['comment_author_email'] ) > 100 )
 778                                 || ( ! $comment2['comment_author_email'] && strlen( $comment1['comment_author_email'] ) > 100 )
 779                         )
 780                 );
 781
 782                 return $comments_match;
 783         }
 784
 785         // Does the supplied comment match the details of the one most recently stored in self::$last_comment?
 786         public static function matches_last_comment( $comment ) {
 787                 if ( is_object( $comment ) )
 788                         $comment = (array) $comment;
 789
 790                 return self::comments_match( self::$last_comment, $comment );
 791         }
 792
 793         private static function get_user_agent() {
 794                 return isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : null;
 795         }
 796
 797         private static function get_referer() {
 798                 return isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : null;
 799         }
 800
 801         // return a comma-separated list of role names for the given user
 802         public static function get_user_roles( $user_id ) {
 803                 $roles = false;
 804
 805                 if ( !class_exists('WP_User') )
 806                         return false;
 807
 808                 if ( $user_id > 0 ) {
 809                         $comment_user = new WP_User( $user_id );
 810                         if ( isset( $comment_user->roles ) )
 811                                 $roles = join( ',', $comment_user->roles );
 812                 }
 813
 814                 if ( is_multisite() && is_super_admin( $user_id ) ) {
 815                         if ( empty( $roles ) ) {
 816                                 $roles = 'super_admin';
 817                         } else {
 818                                 $comment_user->roles[] = 'super_admin';
 819                                 $roles = join( ',', $comment_user->roles );
 820                         }
 821                 }
 822
 823                 return $roles;
 824         }
 825
 826         // filter handler used to return a spam result to pre_comment_approved
 827         public static function last_comment_status( $approved, $comment ) {
 828                 if ( is_null( self::$last_comment_result ) ) {
 829                         // We didn't have reason to store the result of the last check.
 830                         return $approved;
 831                 }
 832
 833                 // Only do this if it's the correct comment
 834                 if ( ! self::matches_last_comment( $comment ) ) {
 835                         self::log( "comment_is_spam mismatched comment, returning unaltered $approved" );
 836                         return $approved;
 837                 }
 838
 839                 // bump the counter here instead of when the filter is added to reduce the possibility of overcounting
 840                 if ( $incr = apply_filters('akismet_spam_count_incr', 1) )
 841                         update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr );
 842
 843                 return self::$last_comment_result;
 844         }
 845
 846         /**
 847          * If Akismet is temporarily unreachable, we don't want to "spam" the blogger with
 848          * moderation emails for comments that will be automatically cleared or spammed on
 849          * the next retry.
 850          *
 851          * For comments that will be rechecked later, empty the list of email addresses that
 852          * the moderation email would be sent to.
 853          *
 854          * @param array $emails An array of email addresses that the moderation email will be sent to.
 855          * @param int $comment_id The ID of the relevant comment.
 856          * @return array An array of email addresses that the moderation email will be sent to.
 857          */
 858         public static function disable_moderation_emails_if_unreachable( $emails, $comment_id ) {
 859                 if ( ! empty( self::$prevent_moderation_email_for_these_comments ) && ! empty( $emails ) ) {
 860                         $comment = get_comment( $comment_id );
 861
 862                         foreach ( self::$prevent_moderation_email_for_these_comments as $possible_match ) {
 863                                 if ( self::comments_match( $possible_match, $comment ) ) {
 864                                         update_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true );
 865                                         return array();
 866                                 }
 867                         }
 868                 }
 869
 870                 return $emails;
 871         }
 872
 873         public static function _cmp_time( $a, $b ) {
 874                 return $a['time'] > $b['time'] ? -1 : 1;
 875         }
 876
 877         public static function _get_microtime() {
 878                 $mtime = explode( ' ', microtime() );
 879                 return $mtime[1] + $mtime[0];
 880         }
 881
 882         /**
 883          * Make a POST request to the Akismet API.
 884          *
 885          * @param string $request The body of the request.
 886          * @param string $path The path for the request.
 887          * @param string $ip The specific IP address to hit.
 888          * @return array A two-member array consisting of the headers and the response body, both empty in the case of a failure.
 889          */
 890         public static function http_post( $request, $path, $ip=null ) {
 891
 892                 $akismet_ua = sprintf( 'WordPress/%s | Akismet/%s', $GLOBALS['wp_version'], constant( 'AKISMET_VERSION' ) );
 893                 $akismet_ua = apply_filters( 'akismet_ua', $akismet_ua );
 894
 895                 $content_length = strlen( $request );
 896
 897                 $api_key   = self::get_api_key();
 898                 $host      = self::API_HOST;
 899
 900                 if ( !empty( $api_key ) )
 901                         $host = $api_key.'.'.$host;
 902
 903                 $http_host = $host;
 904                 // use a specific IP if provided
 905                 // needed by Akismet_Admin::check_server_connectivity()
 906                 if ( $ip && long2ip( ip2long( $ip ) ) ) {
 907                         $http_host = $ip;
 908                 }
 909
 910                 $http_args = array(
 911                         'body' => $request,
 912                         'headers' => array(
 913                                 'Content-Type' => 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' ),
 914                                 'Host' => $host,
 915                                 'User-Agent' => $akismet_ua,
 916                         ),
 917                         'httpversion' => '1.0',
 918                         'timeout' => 15
 919                 );
 920
 921                 $akismet_url = $http_akismet_url = "http://{$http_host}/1.1/{$path}";
 922
 923                 /**
 924                  * Try SSL first; if that fails, try without it and don't try it again for a while.
 925                  */
 926
 927                 $ssl = $ssl_failed = false;
 928
 929                 // Check if SSL requests were disabled fewer than X hours ago.
 930                 $ssl_disabled = get_option( 'akismet_ssl_disabled' );
 931
 932                 if ( $ssl_disabled && $ssl_disabled < ( time() - 60 * 60 * 24 ) ) { // 24 hours
 933                         $ssl_disabled = false;
 934                         delete_option( 'akismet_ssl_disabled' );
 935                 }
 936                 else if ( $ssl_disabled ) {
 937                         do_action( 'akismet_ssl_disabled' );
 938                 }
 939
 940                 if ( ! $ssl_disabled && function_exists( 'wp_http_supports') && ( $ssl = wp_http_supports( array( 'ssl' ) ) ) ) {
 941                         $akismet_url = set_url_scheme( $akismet_url, 'https' );
 942
 943                         do_action( 'akismet_https_request_pre' );
 944                 }
 945
 946                 $response = wp_remote_post( $akismet_url, $http_args );
 947
 948                 Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) );
 949
 950                 if ( $ssl && is_wp_error( $response ) ) {
 951                         do_action( 'akismet_https_request_failure', $response );
 952
 953                         // Intermittent connection problems may cause the first HTTPS
 954                         // request to fail and subsequent HTTP requests to succeed randomly.
 955                         // Retry the HTTPS request once before disabling SSL for a time.
 956                         $response = wp_remote_post( $akismet_url, $http_args );
 957
 958                         Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) );
 959
 960                         if ( is_wp_error( $response ) ) {
 961                                 $ssl_failed = true;
 962
 963                                 do_action( 'akismet_https_request_failure', $response );
 964
 965                                 do_action( 'akismet_http_request_pre' );
 966
 967                                 // Try the request again without SSL.
 968                                 $response = wp_remote_post( $http_akismet_url, $http_args );
 969
 970                                 Akismet::log( compact( 'http_akismet_url', 'http_args', 'response' ) );
 971                         }
 972                 }
 973
 974                 if ( is_wp_error( $response ) ) {
 975                         do_action( 'akismet_request_failure', $response );
 976
 977                         return array( '', '' );
 978                 }
 979
 980                 if ( $ssl_failed ) {
 981                         // The request failed when using SSL but succeeded without it. Disable SSL for future requests.
 982                         update_option( 'akismet_ssl_disabled', time() );
 983
 984                         do_action( 'akismet_https_disabled' );
 985                 }
 986
 987                 $simplified_response = array( $response['headers'], $response['body'] );
 988
 989                 self::update_alert( $simplified_response );
 990
 991                 return $simplified_response;
 992         }
 993
 994         // given a response from an API call like check_key_status(), update the alert code options if an alert is present.
 995         private static function update_alert( $response ) {
 996                 $code = $msg = null;
 997                 if ( isset( $response[0]['x-akismet-alert-code'] ) ) {
 998                         $code = $response[0]['x-akismet-alert-code'];
 999                         $msg  = $response[0]['x-akismet-alert-msg'];
1000                 }
1001
1002                 // only call update_option() if the value has changed
1003                 if ( $code != get_option( 'akismet_alert_code' ) ) {
1004                         if ( ! $code ) {
1005                                 delete_option( 'akismet_alert_code' );
1006                                 delete_option( 'akismet_alert_msg' );
1007                         }
1008                         else {
1009                                 update_option( 'akismet_alert_code', $code );
1010                                 update_option( 'akismet_alert_msg', $msg );
1011                         }
1012                 }
1013         }
1014
1015         public static function load_form_js() {
1016                 // WP < 3.3 can't enqueue a script this late in the game and still have it appear in the footer.
1017                 // Once we drop support for everything pre-3.3, this can change back to a single enqueue call.
1018                 wp_register_script( 'akismet-form', plugin_dir_url( __FILE__ ) . '_inc/form.js', array(), AKISMET_VERSION, true );
1019                 add_action( 'wp_footer', array( 'Akismet', 'print_form_js' ) );
1020                 add_action( 'admin_footer', array( 'Akismet', 'print_form_js' ) );
1021         }
1022
1023         public static function print_form_js() {
1024                 wp_print_scripts( 'akismet-form' );
1025         }
1026
1027         public static function inject_ak_js( $fields ) {
1028                 echo '<p style="display: none;">';
1029                 echo '<input type="hidden" id="ak_js" name="ak_js" value="' . mt_rand( 0, 250 ) . '"/>';
1030                 echo '</p>';
1031         }
1032
1033         private static function bail_on_activation( $message, $deactivate = true ) {
1034 ?>
1035 <!doctype html>
1036 <html>
1037 <head>
1038 <meta charset="<?php bloginfo( 'charset' ); ?>">
1039 <style>
1040 * {
1041         text-align: center;
1042         margin: 0;
1043         padding: 0;
1044         font-family: "Lucida Grande",Verdana,Arial,"Bitstream Vera Sans",sans-serif;
1045 }
1046 p {
1047         margin-top: 1em;
1048         font-size: 18px;
1049 }
1050 </style>
1051 <body>
1052 <p><?php echo esc_html( $message ); ?></p>
1053 </body>
1054 </html>
1055 <?php
1056                 if ( $deactivate ) {
1057                         $plugins = get_option( 'active_plugins' );
1058                         $akismet = plugin_basename( AKISMET__PLUGIN_DIR . 'akismet.php' );
1059                         $update  = false;
1060                         foreach ( $plugins as $i => $plugin ) {
1061                                 if ( $plugin === $akismet ) {
1062                                         $plugins[$i] = false;
1063                                         $update = true;
1064                                 }
1065                         }
1066
1067                         if ( $update ) {
1068                                 update_option( 'active_plugins', array_filter( $plugins ) );
1069                         }
1070                 }
1071                 exit;
1072         }
1073
1074         public static function view( $name, array $args = array() ) {
1075                 $args = apply_filters( 'akismet_view_arguments', $args, $name );
1076
1077                 foreach ( $args AS $key => $val ) {
1078                         $$key = $val;
1079                 }
1080
1081                 load_plugin_textdomain( 'akismet' );
1082
1083                 $file = AKISMET__PLUGIN_DIR . 'views/'. $name . '.php';
1084
1085                 include( $file );
1086         }
1087
1088         /**
1089          * Attached to activate_{ plugin_basename( __FILES__ ) } by register_activation_hook()
1090          * @static
1091          */
1092         public static function plugin_activation() {
1093                 if ( version_compare( $GLOBALS['wp_version'], AKISMET__MINIMUM_WP_VERSION, '<' ) ) {
1094                         load_plugin_textdomain( 'akismet' );
1095
1096                         $message = '<strong>'.sprintf(esc_html__( 'Akismet %s requires WordPress %s or higher.' , 'akismet'), AKISMET_VERSION, AKISMET__MINIMUM_WP_VERSION ).'</strong> '.sprintf(__('Please <a href="%1$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/');
1097
1098                         Akismet::bail_on_activation( $message );
1099                 }
1100         }
1101
1102         /**
1103          * Removes all connection options
1104          * @static
1105          */
1106         public static function plugin_deactivation( ) {
1107                 return self::deactivate_key( self::get_api_key() );
1108         }
1109
1110         /**
1111          * Essentially a copy of WP's build_query but one that doesn't expect pre-urlencoded values.
1112          *
1113          * @param array $args An array of key => value pairs
1114          * @return string A string ready for use as a URL query string.
1115          */
1116         public static function build_query( $args ) {
1117                 return _http_build_query( $args, '', '&' );
1118         }
1119
1120         /**
1121          * Log debugging info to the error log.
1122          *
1123          * Enabled when WP_DEBUG_LOG is enabled (and WP_DEBUG, since according to
1124          * core, "WP_DEBUG_DISPLAY and WP_DEBUG_LOG perform no function unless
1125          * WP_DEBUG is true), but can be disabled via the akismet_debug_log filter.
1126          *
1127          * @param mixed $akismet_debug The data to log.
1128          */
1129         public static function log( $akismet_debug ) {
1130                 if ( apply_filters( 'akismet_debug_log', defined( 'WP_DEBUG' ) && WP_DEBUG && defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG ) ) {
1131                         error_log( print_r( compact( 'akismet_debug' ), true ) );
1132                 }
1133         }
1134
1135         public static function pre_check_pingback( $method ) {
1136                 if ( $method !== 'pingback.ping' )
1137                         return;
1138
1139                 global $wp_xmlrpc_server;
1140
1141                 if ( !is_object( $wp_xmlrpc_server ) )
1142                         return false;
1143
1144                 // Lame: tightly coupled with the IXR class.
1145                 $args = $wp_xmlrpc_server->message->params;
1146
1147                 if ( !empty( $args[1] ) ) {
1148                         $post_id = url_to_postid( $args[1] );
1149
1150                         // If this gets through the pre-check, make sure we properly identify the outbound request as a pingback verification
1151                         Akismet::pingback_forwarded_for( null, $args[0] );
1152                         add_filter( 'http_request_args', array( 'Akismet', 'pingback_forwarded_for' ), 10, 2 );
1153
1154                         $comment = array(
1155                                 'comment_author_url' => $args[0],
1156                                 'comment_post_ID' => $post_id,
1157                                 'comment_author' => '',
1158                                 'comment_author_email' => '',
1159                                 'comment_content' => '',
1160                                 'comment_type' => 'pingback',
1161                                 'akismet_pre_check' => '1',
1162                                 'comment_pingback_target' => $args[1],
1163                         );
1164
1165                         $comment = Akismet::auto_check_comment( $comment );
1166
1167                         if ( isset( $comment['akismet_result'] ) && 'true' == $comment['akismet_result'] ) {
1168                                 // Lame: tightly coupled with the IXR classes. Unfortunately the action provides no context and no way to return anything.
1169                                 $wp_xmlrpc_server->error( new IXR_Error( 0, 'Invalid discovery target' ) );
1170                         }
1171                 }
1172         }
1173
1174         public static function pingback_forwarded_for( $r, $url ) {
1175                 static $urls = array();
1176
1177                 // Call this with $r == null to prime the callback to add headers on a specific URL
1178                 if ( is_null( $r ) && !in_array( $url, $urls ) ) {
1179                         $urls[] = $url;
1180                 }
1181
1182                 // Add X-Pingback-Forwarded-For header, but only for requests to a specific URL (the apparent pingback source)
1183                 if ( is_array( $r ) && is_array( $r['headers'] ) && !isset( $r['headers']['X-Pingback-Forwarded-For'] ) && in_array( $url, $urls ) ) {
1184                         $remote_ip = preg_replace( '/[^a-fx0-9:.,]/i', '', $_SERVER['REMOTE_ADDR'] );
1185
1186                         // Note: this assumes REMOTE_ADDR is correct, and it may not be if a reverse proxy or CDN is in use
1187                         $r['headers']['X-Pingback-Forwarded-For'] = $remote_ip;
1188
1189                         // Also identify the request as a pingback verification in the UA string so it appears in logs
1190                         $r['user-agent'] .= '; verifying pingback from ' . $remote_ip;
1191                 }
1192
1193                 return $r;
1194         }
1195
1196         /**
1197          * Ensure that we are loading expected scalar values from akismet_as_submitted commentmeta.
1198          *
1199          * @param mixed $meta_value
1200          * @return mixed
1201          */
1202         private static function sanitize_comment_as_submitted( $meta_value ) {
1203                 if ( empty( $meta_value ) ) {
1204                         return $meta_value;
1205                 }
1206
1207                 $meta_value = (array) $meta_value;
1208
1209                 foreach ( $meta_value as $key => $value ) {
1210                         if ( ! isset( self::$comment_as_submitted_allowed_keys[$key] ) || ! is_scalar( $value ) ) {
1211                                 unset( $meta_value[$key] );
1212                         }
1213                 }
1214
1215                 return $meta_value;
1216         }
1217 }