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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 private static $is_rest_api_call = false; 14 15 public static function init() { 16 if ( ! self::$initiated ) { 17 self::init_hooks(); 18 } 19 } 20 21 /** 22 * Initializes WordPress hooks 23 */ 24 private static function init_hooks() { 25 self::$initiated = true; 26 27 add_action( 'wp_insert_comment', array( 'Akismet', 'auto_check_update_meta' ), 10, 2 ); 28 add_filter( 'preprocess_comment', array( 'Akismet', 'auto_check_comment' ), 1 ); 29 add_filter( 'rest_pre_insert_comment', array( 'Akismet', 'rest_auto_check_comment' ), 1 ); 30 31 add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments' ) ); 32 add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_old_comments_meta' ) ); 33 add_action( 'akismet_scheduled_delete', array( 'Akismet', 'delete_orphaned_commentmeta' ) ); 34 add_action( 'akismet_schedule_cron_recheck', array( 'Akismet', 'cron_recheck' ) ); 35 36 add_action( 'comment_form', array( 'Akismet', 'add_comment_nonce' ), 1 ); 37 38 add_action( 'admin_head-edit-comments.php', array( 'Akismet', 'load_form_js' ) ); 39 add_action( 'comment_form', array( 'Akismet', 'load_form_js' ) ); 40 add_action( 'comment_form', array( 'Akismet', 'inject_ak_js' ) ); 41 add_filter( 'script_loader_tag', array( 'Akismet', 'set_form_js_async' ), 10, 3 ); 42 43 add_filter( 'comment_moderation_recipients', array( 'Akismet', 'disable_moderation_emails_if_unreachable' ), 1000, 2 ); 44 add_filter( 'pre_comment_approved', array( 'Akismet', 'last_comment_status' ), 10, 2 ); 45 46 add_action( 'transition_comment_status', array( 'Akismet', 'transition_comment_status' ), 10, 3 ); 47 48 // Run this early in the pingback call, before doing a remote fetch of the source uri 49 add_action( 'xmlrpc_call', array( 'Akismet', 'pre_check_pingback' ) ); 50 51 // Jetpack compatibility 52 add_filter( 'jetpack_options_whitelist', array( 'Akismet', 'add_to_jetpack_options_whitelist' ) ); 53 add_action( 'update_option_wordpress_api_key', array( 'Akismet', 'updated_option' ), 10, 2 ); 54 add_action( 'add_option_wordpress_api_key', array( 'Akismet', 'added_option' ), 10, 2 ); 55 56 add_action( 'comment_form_after', array( 'Akismet', 'display_comment_form_privacy_notice' ) ); 57 } 58 59 public static function get_api_key() { 60 return apply_filters( 'akismet_get_api_key', defined('WPCOM_API_KEY') ? constant('WPCOM_API_KEY') : get_option('wordpress_api_key') ); 61 } 62 63 public static function check_key_status( $key, $ip = null ) { 64 return self::http_post( Akismet::build_query( array( 'key' => $key, 'blog' => get_option( 'home' ) ) ), 'verify-key', $ip ); 65 } 66 67 public static function verify_key( $key, $ip = null ) { 68 // Shortcut for obviously invalid keys. 69 if ( strlen( $key ) != 12 ) { 70 return 'invalid'; 71 } 72 73 $response = self::check_key_status( $key, $ip ); 74 75 if ( $response[1] != 'valid' && $response[1] != 'invalid' ) 76 return 'failed'; 77 78 return $response[1]; 79 } 80 81 public static function deactivate_key( $key ) { 82 $response = self::http_post( Akismet::build_query( array( 'key' => $key, 'blog' => get_option( 'home' ) ) ), 'deactivate' ); 83 84 if ( $response[1] != 'deactivated' ) 85 return 'failed'; 86 87 return $response[1]; 88 } 89 90 /** 91 * Add the akismet option to the Jetpack options management whitelist. 92 * 93 * @param array $options The list of whitelisted option names. 94 * @return array The updated whitelist 95 */ 96 public static function add_to_jetpack_options_whitelist( $options ) { 97 $options[] = 'wordpress_api_key'; 98 return $options; 99 } 100 101 /** 102 * When the akismet option is updated, run the registration call. 103 * 104 * This should only be run when the option is updated from the Jetpack/WP.com 105 * API call, and only if the new key is different than the old key. 106 * 107 * @param mixed $old_value The old option value. 108 * @param mixed $value The new option value. 109 */ 110 public static function updated_option( $old_value, $value ) { 111 // Not an API call 112 if ( ! class_exists( 'WPCOM_JSON_API_Update_Option_Endpoint' ) ) { 113 return; 114 } 115 // Only run the registration if the old key is different. 116 if ( $old_value !== $value ) { 117 self::verify_key( $value ); 118 } 119 } 120 121 /** 122 * Treat the creation of an API key the same as updating the API key to a new value. 123 * 124 * @param mixed $option_name Will always be "wordpress_api_key", until something else hooks in here. 125 * @param mixed $value The option value. 126 */ 127 public static function added_option( $option_name, $value ) { 128 if ( 'wordpress_api_key' === $option_name ) { 129 return self::updated_option( '', $value ); 130 } 131 } 132 133 public static function rest_auto_check_comment( $commentdata ) { 134 self::$is_rest_api_call = true; 135 136 return self::auto_check_comment( $commentdata ); 137 } 138 139 public static function auto_check_comment( $commentdata ) { 140 // If no key is configured, then there's no point in doing any of this. 141 if ( ! self::get_api_key() ) { 142 return $commentdata; 143 } 144 145 self::$last_comment_result = null; 146 147 $comment = $commentdata; 148 149 $comment['user_ip'] = self::get_ip_address(); 150 $comment['user_agent'] = self::get_user_agent(); 151 $comment['referrer'] = self::get_referer(); 152 $comment['blog'] = get_option( 'home' ); 153 $comment['blog_lang'] = get_locale(); 154 $comment['blog_charset'] = get_option('blog_charset'); 155 $comment['permalink'] = get_permalink( $comment['comment_post_ID'] ); 156 157 if ( ! empty( $comment['user_ID'] ) ) { 158 $comment['user_role'] = Akismet::get_user_roles( $comment['user_ID'] ); 159 } 160 161 /** See filter documentation in init_hooks(). */ 162 $akismet_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) ); 163 $comment['akismet_comment_nonce'] = 'inactive'; 164 if ( $akismet_nonce_option == 'true' || $akismet_nonce_option == '' ) { 165 $comment['akismet_comment_nonce'] = 'failed'; 166 if ( isset( $_POST['akismet_comment_nonce'] ) && wp_verify_nonce( $_POST['akismet_comment_nonce'], 'akismet_comment_nonce_' . $comment['comment_post_ID'] ) ) 167 $comment['akismet_comment_nonce'] = 'passed'; 168 169 // comment reply in wp-admin 170 if ( isset( $_POST['_ajax_nonce-replyto-comment'] ) && check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment' ) ) 171 $comment['akismet_comment_nonce'] = 'passed'; 172 173 } 174 175 if ( self::is_test_mode() ) 176 $comment['is_test'] = 'true'; 177 178 foreach( $_POST as $key => $value ) { 179 if ( is_string( $value ) ) 180 $comment["POST_{$key}"] = $value; 181 } 182 183 foreach ( $_SERVER as $key => $value ) { 184 if ( ! is_string( $value ) ) { 185 continue; 186 } 187 188 if ( preg_match( "/^HTTP_COOKIE/", $key ) ) { 189 continue; 190 } 191 192 // Send any potentially useful $_SERVER vars, but avoid sending junk we don't need. 193 if ( preg_match( "/^(HTTP_|REMOTE_ADDR|REQUEST_URI|DOCUMENT_URI)/", $key ) ) { 194 $comment[ "$key" ] = $value; 195 } 196 } 197 198 $post = get_post( $comment['comment_post_ID'] ); 199 200 if ( ! is_null( $post ) ) { 201 // $post can technically be null, although in the past, it's always been an indicator of another plugin interfering. 202 $comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt; 203 } 204 205 $response = self::http_post( Akismet::build_query( $comment ), 'comment-check' ); 206 207 do_action( 'akismet_comment_check_response', $response ); 208 209 $commentdata['comment_as_submitted'] = array_intersect_key( $comment, self::$comment_as_submitted_allowed_keys ); 210 $commentdata['akismet_result'] = $response[1]; 211 212 if ( isset( $response[0]['x-akismet-pro-tip'] ) ) 213 $commentdata['akismet_pro_tip'] = $response[0]['x-akismet-pro-tip']; 214 215 if ( isset( $response[0]['x-akismet-error'] ) ) { 216 // An error occurred that we anticipated (like a suspended key) and want the user to act on. 217 // Send to moderation. 218 self::$last_comment_result = '0'; 219 } 220 else if ( 'true' == $response[1] ) { 221 // akismet_spam_count will be incremented later by comment_is_spam() 222 self::$last_comment_result = 'spam'; 223 224 $discard = ( isset( $commentdata['akismet_pro_tip'] ) && $commentdata['akismet_pro_tip'] === 'discard' && self::allow_discard() ); 225 226 do_action( 'akismet_spam_caught', $discard ); 227 228 if ( $discard ) { 229 // The spam is obvious, so we're bailing out early. 230 // akismet_result_spam() won't be called so bump the counter here 231 if ( $incr = apply_filters( 'akismet_spam_count_incr', 1 ) ) { 232 update_option( 'akismet_spam_count', get_option( 'akismet_spam_count' ) + $incr ); 233 } 234 235 if ( self::$is_rest_api_call ) { 236 return new WP_Error( 'akismet_rest_comment_discarded', __( 'Comment discarded.', 'akismet' ) ); 237 } 238 else { 239 // Redirect back to the previous page, or failing that, the post permalink, or failing that, the homepage of the blog. 240 $redirect_to = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : ( $post ? get_permalink( $post ) : home_url() ); 241 wp_safe_redirect( esc_url_raw( $redirect_to ) ); 242 die(); 243 } 244 } 245 else if ( self::$is_rest_api_call ) { 246 // The way the REST API structures its calls, we can set the comment_approved value right away. 247 $commentdata['comment_approved'] = 'spam'; 248 } 249 } 250 251 // if the response is neither true nor false, hold the comment for moderation and schedule a recheck 252 if ( 'true' != $response[1] && 'false' != $response[1] ) { 253 if ( !current_user_can('moderate_comments') ) { 254 // Comment status should be moderated 255 self::$last_comment_result = '0'; 256 } 257 258 if ( ! wp_next_scheduled( 'akismet_schedule_cron_recheck' ) ) { 259 wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); 260 do_action( 'akismet_scheduled_recheck', 'invalid-response-' . $response[1] ); 261 } 262 263 self::$prevent_moderation_email_for_these_comments[] = $commentdata; 264 } 265 266 // Delete old comments daily 267 if ( ! wp_next_scheduled( 'akismet_scheduled_delete' ) ) { 268 wp_schedule_event( time(), 'daily', 'akismet_scheduled_delete' ); 269 } 270 271 self::set_last_comment( $commentdata ); 272 self::fix_scheduled_recheck(); 273 274 return $commentdata; 275 } 276 277 public static function get_last_comment() { 278 return self::$last_comment; 279 } 280 281 public static function set_last_comment( $comment ) { 282 if ( is_null( $comment ) ) { 283 self::$last_comment = null; 284 } 285 else { 286 // We filter it here so that it matches the filtered comment data that we'll have to compare against later. 287 // wp_filter_comment expects comment_author_IP 288 self::$last_comment = wp_filter_comment( 289 array_merge( 290 array( 'comment_author_IP' => self::get_ip_address() ), 291 $comment 292 ) 293 ); 294 } 295 } 296 297 // this fires on wp_insert_comment. we can't update comment_meta when auto_check_comment() runs 298 // because we don't know the comment ID at that point. 299 public static function auto_check_update_meta( $id, $comment ) { 300 // wp_insert_comment() might be called in other contexts, so make sure this is the same comment 301 // as was checked by auto_check_comment 302 if ( is_object( $comment ) && !empty( self::$last_comment ) && is_array( self::$last_comment ) ) { 303 if ( self::matches_last_comment( $comment ) ) { 304 305 load_plugin_textdomain( 'akismet' ); 306 307 // normal result: true or false 308 if ( self::$last_comment['akismet_result'] == 'true' ) { 309 update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' ); 310 self::update_comment_history( $comment->comment_ID, '', 'check-spam' ); 311 if ( $comment->comment_approved != 'spam' ) 312 self::update_comment_history( 313 $comment->comment_ID, 314 '', 315 'status-changed-'.$comment->comment_approved 316 ); 317 } 318 elseif ( self::$last_comment['akismet_result'] == 'false' ) { 319 update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' ); 320 self::update_comment_history( $comment->comment_ID, '', 'check-ham' ); 321 // Status could be spam or trash, depending on the WP version and whether this change applies: 322 // https://core.trac.wordpress.org/changeset/34726 323 if ( $comment->comment_approved == 'spam' || $comment->comment_approved == 'trash' ) { 324 if ( wp_blacklist_check($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent) ) 325 self::update_comment_history( $comment->comment_ID, '', 'wp-blacklisted' ); 326 else 327 self::update_comment_history( $comment->comment_ID, '', 'status-changed-'.$comment->comment_approved ); 328 } 329 } // abnormal result: error 330 else { 331 update_comment_meta( $comment->comment_ID, 'akismet_error', time() ); 332 self::update_comment_history( 333 $comment->comment_ID, 334 '', 335 'check-error', 336 array( 'response' => substr( self::$last_comment['akismet_result'], 0, 50 ) ) 337 ); 338 } 339 340 // record the complete original data as submitted for checking 341 if ( isset( self::$last_comment['comment_as_submitted'] ) ) 342 update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', self::$last_comment['comment_as_submitted'] ); 343 344 if ( isset( self::$last_comment['akismet_pro_tip'] ) ) 345 update_comment_meta( $comment->comment_ID, 'akismet_pro_tip', self::$last_comment['akismet_pro_tip'] ); 346 } 347 } 348 } 349 350 public static function delete_old_comments() { 351 global $wpdb; 352 353 /** 354 * Determines how many comments will be deleted in each batch. 355 * 356 * @param int The default, as defined by AKISMET_DELETE_LIMIT. 357 */ 358 $delete_limit = apply_filters( 'akismet_delete_comment_limit', defined( 'AKISMET_DELETE_LIMIT' ) ? AKISMET_DELETE_LIMIT : 10000 ); 359 $delete_limit = max( 1, intval( $delete_limit ) ); 360 361 /** 362 * Determines how many days a comment will be left in the Spam queue before being deleted. 363 * 364 * @param int The default number of days. 365 */ 366 $delete_interval = apply_filters( 'akismet_delete_comment_interval', 15 ); 367 $delete_interval = max( 1, intval( $delete_interval ) ); 368 369 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 ) ) ) { 370 if ( empty( $comment_ids ) ) 371 return; 372 373 $wpdb->queries = array(); 374 375 foreach ( $comment_ids as $comment_id ) { 376 do_action( 'delete_comment', $comment_id ); 377 do_action( 'akismet_batch_delete_count', __FUNCTION__ ); 378 } 379 380 // Prepared as strings since comment_id is an unsigned BIGINT, and using %d will constrain the value to the maximum signed BIGINT. 381 $format_string = implode( ", ", array_fill( 0, count( $comment_ids ), '%s' ) ); 382 383 $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->comments} WHERE comment_id IN ( " . $format_string . " )", $comment_ids ) ); 384 $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->commentmeta} WHERE comment_id IN ( " . $format_string . " )", $comment_ids ) ); 385 386 clean_comment_cache( $comment_ids ); 387 do_action( 'akismet_delete_comment_batch', count( $comment_ids ) ); 388 } 389 390 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->comments ) ) // lucky number 391 $wpdb->query("OPTIMIZE TABLE {$wpdb->comments}"); 392 } 393 394 public static function delete_old_comments_meta() { 395 global $wpdb; 396 397 $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 ); 398 399 # enforce a minimum of 1 day 400 $interval = absint( $interval ); 401 if ( $interval < 1 ) 402 $interval = 1; 403 404 // akismet_as_submitted meta values are large, so expire them 405 // after $interval days regardless of the comment status 406 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 ) ) ) { 407 if ( empty( $comment_ids ) ) 408 return; 409 410 $wpdb->queries = array(); 411 412 foreach ( $comment_ids as $comment_id ) { 413 delete_comment_meta( $comment_id, 'akismet_as_submitted' ); 414 do_action( 'akismet_batch_delete_count', __FUNCTION__ ); 415 } 416 417 do_action( 'akismet_delete_commentmeta_batch', count( $comment_ids ) ); 418 } 419 420 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number 421 $wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}"); 422 } 423 424 // Clear out comments meta that no longer have corresponding comments in the database 425 public static function delete_orphaned_commentmeta() { 426 global $wpdb; 427 428 $last_meta_id = 0; 429 $start_time = isset( $_SERVER['REQUEST_TIME_FLOAT'] ) ? $_SERVER['REQUEST_TIME_FLOAT'] : microtime( true ); 430 $max_exec_time = max( ini_get('max_execution_time') - 5, 3 ); 431 432 while ( $commentmeta_results = $wpdb->get_results( $wpdb->prepare( "SELECT m.meta_id, m.comment_id, m.meta_key FROM {$wpdb->commentmeta} as m LEFT JOIN {$wpdb->comments} as c USING(comment_id) WHERE c.comment_id IS NULL AND m.meta_id > %d ORDER BY m.meta_id LIMIT 1000", $last_meta_id ) ) ) { 433 if ( empty( $commentmeta_results ) ) 434 return; 435 436 $wpdb->queries = array(); 437 438 $commentmeta_deleted = 0; 439 440 foreach ( $commentmeta_results as $commentmeta ) { 441 if ( 'akismet_' == substr( $commentmeta->meta_key, 0, 8 ) ) { 442 delete_comment_meta( $commentmeta->comment_id, $commentmeta->meta_key ); 443 do_action( 'akismet_batch_delete_count', __FUNCTION__ ); 444 $commentmeta_deleted++; 445 } 446 447 $last_meta_id = $commentmeta->meta_id; 448 } 449 450 do_action( 'akismet_delete_commentmeta_batch', $commentmeta_deleted ); 451 452 // If we're getting close to max_execution_time, quit for this round. 453 if ( microtime(true) - $start_time > $max_exec_time ) 454 return; 455 } 456 457 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number 458 $wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}"); 459 } 460 461 // how many approved comments does this author have? 462 public static function get_user_comments_approved( $user_id, $comment_author_email, $comment_author, $comment_author_url ) { 463 global $wpdb; 464 465 if ( !empty( $user_id ) ) 466 return (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->comments} WHERE user_id = %d AND comment_approved = 1", $user_id ) ); 467 468 if ( !empty( $comment_author_email ) ) 469 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 ) ); 470 471 return 0; 472 } 473 474 // get the full comment history for a given comment, as an array in reverse chronological order 475 public static function get_comment_history( $comment_id ) { 476 $history = get_comment_meta( $comment_id, 'akismet_history', false ); 477 if ( empty( $history ) || empty( $history[ 0 ] ) ) { 478 return false; 479 } 480 481 /* 482 // To see all variants when testing. 483 $history[] = array( 'time' => 445856401, 'message' => 'Old versions of Akismet stored the message as a literal string in the commentmeta.', 'event' => null ); 484 $history[] = array( 'time' => 445856402, 'event' => 'recheck-spam' ); 485 $history[] = array( 'time' => 445856403, 'event' => 'check-spam' ); 486 $history[] = array( 'time' => 445856404, 'event' => 'recheck-ham' ); 487 $history[] = array( 'time' => 445856405, 'event' => 'check-ham' ); 488 $history[] = array( 'time' => 445856406, 'event' => 'wp-blacklisted' ); 489 $history[] = array( 'time' => 445856407, 'event' => 'report-spam' ); 490 $history[] = array( 'time' => 445856408, 'event' => 'report-spam', 'user' => 'sam' ); 491 $history[] = array( 'message' => 'sam reported this comment as spam (hardcoded message).', 'time' => 445856400, 'event' => 'report-spam', 'user' => 'sam' ); 492 $history[] = array( 'time' => 445856409, 'event' => 'report-ham', 'user' => 'sam' ); 493 $history[] = array( 'message' => 'sam reported this comment as ham (hardcoded message).', 'time' => 445856400, 'event' => 'report-ham', 'user' => 'sam' ); // 494 $history[] = array( 'time' => 445856410, 'event' => 'cron-retry-spam' ); 495 $history[] = array( 'time' => 445856411, 'event' => 'cron-retry-ham' ); 496 $history[] = array( 'time' => 445856412, 'event' => 'check-error' ); // 497 $history[] = array( 'time' => 445856413, 'event' => 'check-error', 'meta' => array( 'response' => 'The server was taking a nap.' ) ); 498 $history[] = array( 'time' => 445856414, 'event' => 'recheck-error' ); // Should not generate a message. 499 $history[] = array( 'time' => 445856415, 'event' => 'recheck-error', 'meta' => array( 'response' => 'The server was taking a nap.' ) ); 500 $history[] = array( 'time' => 445856416, 'event' => 'status-changedtrash' ); 501 $history[] = array( 'time' => 445856417, 'event' => 'status-changedspam' ); 502 $history[] = array( 'time' => 445856418, 'event' => 'status-changedhold' ); 503 $history[] = array( 'time' => 445856419, 'event' => 'status-changedapprove' ); 504 $history[] = array( 'time' => 445856420, 'event' => 'status-changed-trash' ); 505 $history[] = array( 'time' => 445856421, 'event' => 'status-changed-spam' ); 506 $history[] = array( 'time' => 445856422, 'event' => 'status-changed-hold' ); 507 $history[] = array( 'time' => 445856423, 'event' => 'status-changed-approve' ); 508 $history[] = array( 'time' => 445856424, 'event' => 'status-trash', 'user' => 'sam' ); 509 $history[] = array( 'time' => 445856425, 'event' => 'status-spam', 'user' => 'sam' ); 510 $history[] = array( 'time' => 445856426, 'event' => 'status-hold', 'user' => 'sam' ); 511 $history[] = array( 'time' => 445856427, 'event' => 'status-approve', 'user' => 'sam' ); 512 */ 513 514 usort( $history, array( 'Akismet', '_cmp_time' ) ); 515 return $history; 516 } 517 518 /** 519 * Log an event for a given comment, storing it in comment_meta. 520 * 521 * @param int $comment_id The ID of the relevant comment. 522 * @param string $message The string description of the event. No longer used. 523 * @param string $event The event code. 524 * @param array $meta Metadata about the history entry. e.g., the user that reported or changed the status of a given comment. 525 */ 526 public static function update_comment_history( $comment_id, $message, $event=null, $meta=null ) { 527 global $current_user; 528 529 $user = ''; 530 531 $event = array( 532 'time' => self::_get_microtime(), 533 'event' => $event, 534 ); 535 536 if ( is_object( $current_user ) && isset( $current_user->user_login ) ) { 537 $event['user'] = $current_user->user_login; 538 } 539 540 if ( ! empty( $meta ) ) { 541 $event['meta'] = $meta; 542 } 543 544 // $unique = false so as to allow multiple values per comment 545 $r = add_comment_meta( $comment_id, 'akismet_history', $event, false ); 546 } 547 548 public static function check_db_comment( $id, $recheck_reason = 'recheck_queue' ) { 549 global $wpdb; 550 551 if ( ! self::get_api_key() ) { 552 return new WP_Error( 'akismet-not-configured', __( 'Akismet is not configured. Please enter an API key.', 'akismet' ) ); 553 } 554 555 $c = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $id ), ARRAY_A ); 556 557 if ( ! $c ) { 558 return new WP_Error( 'invalid-comment-id', __( 'Comment not found.', 'akismet' ) ); 559 } 560 561 $c['user_ip'] = $c['comment_author_IP']; 562 $c['user_agent'] = $c['comment_agent']; 563 $c['referrer'] = ''; 564 $c['blog'] = get_option( 'home' ); 565 $c['blog_lang'] = get_locale(); 566 $c['blog_charset'] = get_option('blog_charset'); 567 $c['permalink'] = get_permalink($c['comment_post_ID']); 568 $c['recheck_reason'] = $recheck_reason; 569 570 $c['user_role'] = ''; 571 if ( ! empty( $c['user_ID'] ) ) { 572 $c['user_role'] = Akismet::get_user_roles( $c['user_ID'] ); 573 } 574 575 if ( self::is_test_mode() ) 576 $c['is_test'] = 'true'; 577 578 $response = self::http_post( Akismet::build_query( $c ), 'comment-check' ); 579 580 if ( ! empty( $response[1] ) ) { 581 return $response[1]; 582 } 583 584 return false; 585 } 586 587 public static function recheck_comment( $id, $recheck_reason = 'recheck_queue' ) { 588 add_comment_meta( $id, 'akismet_rechecking', true ); 589 590 $api_response = self::check_db_comment( $id, $recheck_reason ); 591 592 delete_comment_meta( $id, 'akismet_rechecking' ); 593 594 if ( is_wp_error( $api_response ) ) { 595 // Invalid comment ID. 596 } 597 else if ( 'true' === $api_response ) { 598 wp_set_comment_status( $id, 'spam' ); 599 update_comment_meta( $id, 'akismet_result', 'true' ); 600 delete_comment_meta( $id, 'akismet_error' ); 601 delete_comment_meta( $id, 'akismet_delayed_moderation_email' ); 602 Akismet::update_comment_history( $id, '', 'recheck-spam' ); 603 } 604 elseif ( 'false' === $api_response ) { 605 update_comment_meta( $id, 'akismet_result', 'false' ); 606 delete_comment_meta( $id, 'akismet_error' ); 607 delete_comment_meta( $id, 'akismet_delayed_moderation_email' ); 608 Akismet::update_comment_history( $id, '', 'recheck-ham' ); 609 } 610 else { 611 // abnormal result: error 612 update_comment_meta( $id, 'akismet_result', 'error' ); 613 Akismet::update_comment_history( 614 $id, 615 '', 616 'recheck-error', 617 array( 'response' => substr( $api_response, 0, 50 ) ) 618 ); 619 } 620 621 return $api_response; 622 } 623 624 public static function transition_comment_status( $new_status, $old_status, $comment ) { 625 626 if ( $new_status == $old_status ) 627 return; 628 629 if ( 'spam' === $new_status || 'spam' === $old_status ) { 630 // Clear the cache of the "X comments in your spam queue" count on the dashboard. 631 wp_cache_delete( 'akismet_spam_count', 'widget' ); 632 } 633 634 # we don't need to record a history item for deleted comments 635 if ( $new_status == 'delete' ) 636 return; 637 638 if ( !current_user_can( 'edit_post', $comment->comment_post_ID ) && !current_user_can( 'moderate_comments' ) ) 639 return; 640 641 if ( defined('WP_IMPORTING') && WP_IMPORTING == true ) 642 return; 643 644 // if this is present, it means the status has been changed by a re-check, not an explicit user action 645 if ( get_comment_meta( $comment->comment_ID, 'akismet_rechecking' ) ) 646 return; 647 648 // Assumption alert: 649 // We want to submit comments to Akismet only when a moderator explicitly spams or approves it - not if the status 650 // is changed automatically by another plugin. Unfortunately WordPress doesn't provide an unambiguous way to 651 // determine why the transition_comment_status action was triggered. And there are several different ways by which 652 // to spam and unspam comments: bulk actions, ajax, links in moderation emails, the dashboard, and perhaps others. 653 // We'll assume that this is an explicit user action if certain POST/GET variables exist. 654 if ( 655 // status=spam: Marking as spam via the REST API or... 656 // status=unspam: I'm not sure. Maybe this used to be used instead of status=approved? Or the UI for removing from spam but not approving has been since removed?... 657 // status=approved: Unspamming via the REST API (Calypso) or... 658 ( isset( $_POST['status'] ) && in_array( $_POST['status'], array( 'spam', 'unspam', 'approved', ) ) ) 659 // spam=1: Clicking "Spam" underneath a comment in wp-admin and allowing the AJAX request to happen. 660 || ( isset( $_POST['spam'] ) && (int) $_POST['spam'] == 1 ) 661 // unspam=1: Clicking "Not Spam" underneath a comment in wp-admin and allowing the AJAX request to happen. Or, clicking "Undo" after marking something as spam. 662 || ( isset( $_POST['unspam'] ) && (int) $_POST['unspam'] == 1 ) 663 // comment_status=spam/unspam: It's unclear where this is happening. 664 || ( isset( $_POST['comment_status'] ) && in_array( $_POST['comment_status'], array( 'spam', 'unspam' ) ) ) 665 // action=spam: Choosing "Mark as Spam" from the Bulk Actions dropdown in wp-admin (or the "Spam it" link in notification emails). 666 // action=unspam: Choosing "Not Spam" from the Bulk Actions dropdown in wp-admin. 667 // action=spamcomment: Following the "Spam" link below a comment in wp-admin (not allowing AJAX request to happen). 668 // action=unspamcomment: Following the "Not Spam" link below a comment in wp-admin (not allowing AJAX request to happen). 669 || ( isset( $_GET['action'] ) && in_array( $_GET['action'], array( 'spam', 'unspam', 'spamcomment', 'unspamcomment', ) ) ) 670 // action=editedcomment: Editing a comment via wp-admin (and possibly changing its status). 671 || ( isset( $_POST['action'] ) && in_array( $_POST['action'], array( 'editedcomment' ) ) ) 672 // for=jetpack: Moderation via the WordPress app, Calypso, anything powered by the Jetpack connection. 673 || ( isset( $_GET['for'] ) && ( 'jetpack' == $_GET['for'] ) && ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) ) 674 // Certain WordPress.com API requests 675 || ( defined( 'REST_API_REQUEST' ) && REST_API_REQUEST ) 676 // WordPress.org REST API requests 677 || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) 678 ) { 679 if ( $new_status == 'spam' && ( $old_status == 'approved' || $old_status == 'unapproved' || !$old_status ) ) { 680 return self::submit_spam_comment( $comment->comment_ID ); 681 } elseif ( $old_status == 'spam' && ( $new_status == 'approved' || $new_status == 'unapproved' ) ) { 682 return self::submit_nonspam_comment( $comment->comment_ID ); 683 } 684 } 685 686 self::update_comment_history( $comment->comment_ID, '', 'status-' . $new_status ); 687 } 688 689 public static function submit_spam_comment( $comment_id ) { 690 global $wpdb, $current_user, $current_site; 691 692 $comment_id = (int) $comment_id; 693 694 $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) ); 695 696 if ( !$comment ) // it was deleted 697 return; 698 699 if ( 'spam' != $comment->comment_approved ) 700 return; 701 702 self::update_comment_history( $comment_id, '', 'report-spam' ); 703 704 // If the user hasn't configured Akismet, there's nothing else to do at this point. 705 if ( ! self::get_api_key() ) { 706 return; 707 } 708 709 // use the original version stored in comment_meta if available 710 $as_submitted = self::sanitize_comment_as_submitted( get_comment_meta( $comment_id, 'akismet_as_submitted', true ) ); 711 712 if ( $as_submitted && is_array( $as_submitted ) && isset( $as_submitted['comment_content'] ) ) 713 $comment = (object) array_merge( (array)$comment, $as_submitted ); 714 715 $comment->blog = get_option( 'home' ); 716 $comment->blog_lang = get_locale(); 717 $comment->blog_charset = get_option('blog_charset'); 718 $comment->permalink = get_permalink($comment->comment_post_ID); 719 720 if ( is_object($current_user) ) 721 $comment->reporter = $current_user->user_login; 722 723 if ( is_object($current_site) ) 724 $comment->site_domain = $current_site->domain; 725 726 $comment->user_role = ''; 727 if ( ! empty( $comment->user_ID ) ) { 728 $comment->user_role = Akismet::get_user_roles( $comment->user_ID ); 729 } 730 731 if ( self::is_test_mode() ) 732 $comment->is_test = 'true'; 733 734 $post = get_post( $comment->comment_post_ID ); 735 736 if ( ! is_null( $post ) ) { 737 $comment->comment_post_modified_gmt = $post->post_modified_gmt; 738 } 739 740 $response = Akismet::http_post( Akismet::build_query( $comment ), 'submit-spam' ); 741 742 update_comment_meta( $comment_id, 'akismet_user_result', 'true' ); 743 744 if ( $comment->reporter ) { 745 update_comment_meta( $comment_id, 'akismet_user', $comment->reporter ); 746 } 747 748 do_action('akismet_submit_spam_comment', $comment_id, $response[1]); 749 } 750 751 public static function submit_nonspam_comment( $comment_id ) { 752 global $wpdb, $current_user, $current_site; 753 754 $comment_id = (int) $comment_id; 755 756 $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) ); 757 if ( !$comment ) // it was deleted 758 return; 759 760 self::update_comment_history( $comment_id, '', 'report-ham' ); 761 762 // If the user hasn't configured Akismet, there's nothing else to do at this point. 763 if ( ! self::get_api_key() ) { 764 return; 765 } 766 767 // use the original version stored in comment_meta if available 768 $as_submitted = self::sanitize_comment_as_submitted( get_comment_meta( $comment_id, 'akismet_as_submitted', true ) ); 769 770 if ( $as_submitted && is_array($as_submitted) && isset($as_submitted['comment_content']) ) 771 $comment = (object) array_merge( (array)$comment, $as_submitted ); 772 773 $comment->blog = get_option( 'home' ); 774 $comment->blog_lang = get_locale(); 775 $comment->blog_charset = get_option('blog_charset'); 776 $comment->permalink = get_permalink( $comment->comment_post_ID ); 777 $comment->user_role = ''; 778 779 if ( is_object($current_user) ) 780 $comment->reporter = $current_user->user_login; 781 782 if ( is_object($current_site) ) 783 $comment->site_domain = $current_site->domain; 784 785 if ( ! empty( $comment->user_ID ) ) { 786 $comment->user_role = Akismet::get_user_roles( $comment->user_ID ); 787 } 788 789 if ( Akismet::is_test_mode() ) 790 $comment->is_test = 'true'; 791 792 $post = get_post( $comment->comment_post_ID ); 793 794 if ( ! is_null( $post ) ) { 795 $comment->comment_post_modified_gmt = $post->post_modified_gmt; 796 } 797 798 $response = self::http_post( Akismet::build_query( $comment ), 'submit-ham' ); 799 800 update_comment_meta( $comment_id, 'akismet_user_result', 'false' ); 801 802 if ( $comment->reporter ) { 803 update_comment_meta( $comment_id, 'akismet_user', $comment->reporter ); 804 } 805 806 do_action('akismet_submit_nonspam_comment', $comment_id, $response[1]); 807 } 808 809 public static function cron_recheck() { 810 global $wpdb; 811 812 $api_key = self::get_api_key(); 813 814 $status = self::verify_key( $api_key ); 815 if ( get_option( 'akismet_alert_code' ) || $status == 'invalid' ) { 816 // since there is currently a problem with the key, reschedule a check for 6 hours hence 817 wp_schedule_single_event( time() + 21600, 'akismet_schedule_cron_recheck' ); 818 do_action( 'akismet_scheduled_recheck', 'key-problem-' . get_option( 'akismet_alert_code' ) . '-' . $status ); 819 return false; 820 } 821 822 delete_option('akismet_available_servers'); 823 824 $comment_errors = $wpdb->get_col( "SELECT comment_id FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error' LIMIT 100" ); 825 826 load_plugin_textdomain( 'akismet' ); 827 828 foreach ( (array) $comment_errors as $comment_id ) { 829 // if the comment no longer exists, or is too old, remove the meta entry from the queue to avoid getting stuck 830 $comment = get_comment( $comment_id ); 831 832 if ( 833 ! $comment // Comment has been deleted 834 || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) // Comment is too old. 835 || $comment->comment_approved !== "0" // Comment is no longer in the Pending queue 836 ) { 837 delete_comment_meta( $comment_id, 'akismet_error' ); 838 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); 839 continue; 840 } 841 842 add_comment_meta( $comment_id, 'akismet_rechecking', true ); 843 $status = self::check_db_comment( $comment_id, 'retry' ); 844 845 $event = ''; 846 if ( $status == 'true' ) { 847 $event = 'cron-retry-spam'; 848 } elseif ( $status == 'false' ) { 849 $event = 'cron-retry-ham'; 850 } 851 852 // If we got back a legit response then update the comment history 853 // other wise just bail now and try again later. No point in 854 // re-trying all the comments once we hit one failure. 855 if ( !empty( $event ) ) { 856 delete_comment_meta( $comment_id, 'akismet_error' ); 857 self::update_comment_history( $comment_id, '', $event ); 858 update_comment_meta( $comment_id, 'akismet_result', $status ); 859 // make sure the comment status is still pending. if it isn't, that means the user has already moved it elsewhere. 860 $comment = get_comment( $comment_id ); 861 if ( $comment && 'unapproved' == wp_get_comment_status( $comment_id ) ) { 862 if ( $status == 'true' ) { 863 wp_spam_comment( $comment_id ); 864 } elseif ( $status == 'false' ) { 865 // comment is good, but it's still in the pending queue. depending on the moderation settings 866 // we may need to change it to approved. 867 if ( check_comment($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent, $comment->comment_type) ) 868 wp_set_comment_status( $comment_id, 1 ); 869 else if ( get_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ) ) 870 wp_notify_moderator( $comment_id ); 871 } 872 } 873 874 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); 875 } else { 876 // If this comment has been pending moderation for longer than MAX_DELAY_BEFORE_MODERATION_EMAIL, 877 // send a moderation email now. 878 if ( ( intval( gmdate( 'U' ) ) - strtotime( $comment->comment_date_gmt ) ) < self::MAX_DELAY_BEFORE_MODERATION_EMAIL ) { 879 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); 880 wp_notify_moderator( $comment_id ); 881 } 882 883 delete_comment_meta( $comment_id, 'akismet_rechecking' ); 884 wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); 885 do_action( 'akismet_scheduled_recheck', 'check-db-comment-' . $status ); 886 return; 887 } 888 delete_comment_meta( $comment_id, 'akismet_rechecking' ); 889 } 890 891 $remaining = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error'" ); 892 if ( $remaining && !wp_next_scheduled('akismet_schedule_cron_recheck') ) { 893 wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); 894 do_action( 'akismet_scheduled_recheck', 'remaining' ); 895 } 896 } 897 898 public static function fix_scheduled_recheck() { 899 $future_check = wp_next_scheduled( 'akismet_schedule_cron_recheck' ); 900 if ( !$future_check ) { 901 return; 902 } 903 904 if ( get_option( 'akismet_alert_code' ) > 0 ) { 905 return; 906 } 907 908 $check_range = time() + 1200; 909 if ( $future_check > $check_range ) { 910 wp_clear_scheduled_hook( 'akismet_schedule_cron_recheck' ); 911 wp_schedule_single_event( time() + 300, 'akismet_schedule_cron_recheck' ); 912 do_action( 'akismet_scheduled_recheck', 'fix-scheduled-recheck' ); 913 } 914 } 915 916 public static function add_comment_nonce( $post_id ) { 917 /** 918 * To disable the Akismet comment nonce, add a filter for the 'akismet_comment_nonce' tag 919 * and return any string value that is not 'true' or '' (empty string). 920 * 921 * Don't return boolean false, because that implies that the 'akismet_comment_nonce' option 922 * has not been set and that Akismet should just choose the default behavior for that 923 * situation. 924 */ 925 926 if ( ! self::get_api_key() ) { 927 return; 928 } 929 930 $akismet_comment_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) ); 931 932 if ( $akismet_comment_nonce_option == 'true' || $akismet_comment_nonce_option == '' ) { 933 echo '<p style="display: none;">'; 934 wp_nonce_field( 'akismet_comment_nonce_' . $post_id, 'akismet_comment_nonce', FALSE ); 935 echo '</p>'; 936 } 937 } 938 939 public static function is_test_mode() { 940 return defined('AKISMET_TEST_MODE') && AKISMET_TEST_MODE; 941 } 942 943 public static function allow_discard() { 944 if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) 945 return false; 946 if ( is_user_logged_in() ) 947 return false; 948 949 return ( get_option( 'akismet_strictness' ) === '1' ); 950 } 951 952 public static function get_ip_address() { 953 return isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : null; 954 } 955 956 /** 957 * Do these two comments, without checking the comment_ID, "match"? 958 * 959 * @param mixed $comment1 A comment object or array. 960 * @param mixed $comment2 A comment object or array. 961 * @return bool Whether the two comments should be treated as the same comment. 962 */ 963 private static function comments_match( $comment1, $comment2 ) { 964 $comment1 = (array) $comment1; 965 $comment2 = (array) $comment2; 966 967 // Set default values for these strings that we check in order to simplify 968 // the checks and avoid PHP warnings. 969 if ( ! isset( $comment1['comment_author'] ) ) { 970 $comment1['comment_author'] = ''; 971 } 972 973 if ( ! isset( $comment2['comment_author'] ) ) { 974 $comment2['comment_author'] = ''; 975 } 976 977 if ( ! isset( $comment1['comment_author_email'] ) ) { 978 $comment1['comment_author_email'] = ''; 979 } 980 981 if ( ! isset( $comment2['comment_author_email'] ) ) { 982 $comment2['comment_author_email'] = ''; 983 } 984 985 $comments_match = ( 986 isset( $comment1['comment_post_ID'], $comment2['comment_post_ID'] ) 987 && intval( $comment1['comment_post_ID'] ) == intval( $comment2['comment_post_ID'] ) 988 && ( 989 // The comment author length max is 255 characters, limited by the TINYTEXT column type. 990 // If the comment author includes multibyte characters right around the 255-byte mark, they 991 // may be stripped when the author is saved in the DB, so a 300+ char author may turn into 992 // a 253-char author when it's saved, not 255 exactly. The longest possible character is 993 // theoretically 6 bytes, so we'll only look at the first 248 bytes to be safe. 994 substr( $comment1['comment_author'], 0, 248 ) == substr( $comment2['comment_author'], 0, 248 ) 995 || substr( stripslashes( $comment1['comment_author'] ), 0, 248 ) == substr( $comment2['comment_author'], 0, 248 ) 996 || substr( $comment1['comment_author'], 0, 248 ) == substr( stripslashes( $comment2['comment_author'] ), 0, 248 ) 997 // Certain long comment author names will be truncated to nothing, depending on their encoding. 998 || ( ! $comment1['comment_author'] && strlen( $comment2['comment_author'] ) > 248 ) 999 || ( ! $comment2['comment_author'] && strlen( $comment1['comment_author'] ) > 248 ) 1000 ) 1001 && ( 1002 // The email max length is 100 characters, limited by the VARCHAR(100) column type. 1003 // Same argument as above for only looking at the first 93 characters. 1004 substr( $comment1['comment_author_email'], 0, 93 ) == substr( $comment2['comment_author_email'], 0, 93 ) 1005 || substr( stripslashes( $comment1['comment_author_email'] ), 0, 93 ) == substr( $comment2['comment_author_email'], 0, 93 ) 1006 || substr( $comment1['comment_author_email'], 0, 93 ) == substr( stripslashes( $comment2['comment_author_email'] ), 0, 93 ) 1007 // Very long emails can be truncated and then stripped if the [0:100] substring isn't a valid address. 1008 || ( ! $comment1['comment_author_email'] && strlen( $comment2['comment_author_email'] ) > 100 ) 1009 || ( ! $comment2['comment_author_email'] && strlen( $comment1['comment_author_email'] ) > 100 ) 1010 ) 1011 ); 1012 1013 return $comments_match; 1014 } 1015 1016 // Does the supplied comment match the details of the one most recently stored in self::$last_comment? 1017 public static function matches_last_comment( $comment ) { 1018 return self::comments_match( self::$last_comment, $comment ); 1019 } 1020 1021 private static function get_user_agent() { 1022 return isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : null; 1023 } 1024 1025 private static function get_referer() { 1026 return isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : null; 1027 } 1028 1029 // return a comma-separated list of role names for the given user 1030 public static function get_user_roles( $user_id ) { 1031 $roles = false; 1032 1033 if ( !class_exists('WP_User') ) 1034 return false; 1035 1036 if ( $user_id > 0 ) { 1037 $comment_user = new WP_User( $user_id ); 1038 if ( isset( $comment_user->roles ) ) 1039 $roles = join( ',', $comment_user->roles ); 1040 } 1041 1042 if ( is_multisite() && is_super_admin( $user_id ) ) { 1043 if ( empty( $roles ) ) { 1044 $roles = 'super_admin'; 1045 } else { 1046 $comment_user->roles[] = 'super_admin'; 1047 $roles = join( ',', $comment_user->roles ); 1048 } 1049 } 1050 1051 return $roles; 1052 } 1053 1054 // filter handler used to return a spam result to pre_comment_approved 1055 public static function last_comment_status( $approved, $comment ) { 1056 if ( is_null( self::$last_comment_result ) ) { 1057 // We didn't have reason to store the result of the last check. 1058 return $approved; 1059 } 1060 1061 // Only do this if it's the correct comment 1062 if ( ! self::matches_last_comment( $comment ) ) { 1063 self::log( "comment_is_spam mismatched comment, returning unaltered $approved" ); 1064 return $approved; 1065 } 1066 1067 if ( 'trash' === $approved ) { 1068 // If the last comment we checked has had its approval set to 'trash', 1069 // then it failed the comment blacklist check. Let that blacklist override 1070 // the spam check, since users have the (valid) expectation that when 1071 // they fill out their blacklists, comments that match it will always 1072 // end up in the trash. 1073 return $approved; 1074 } 1075 1076 // bump the counter here instead of when the filter is added to reduce the possibility of overcounting 1077 if ( $incr = apply_filters('akismet_spam_count_incr', 1) ) 1078 update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr ); 1079 1080 return self::$last_comment_result; 1081 } 1082 1083 /** 1084 * If Akismet is temporarily unreachable, we don't want to "spam" the blogger with 1085 * moderation emails for comments that will be automatically cleared or spammed on 1086 * the next retry. 1087 * 1088 * For comments that will be rechecked later, empty the list of email addresses that 1089 * the moderation email would be sent to. 1090 * 1091 * @param array $emails An array of email addresses that the moderation email will be sent to. 1092 * @param int $comment_id The ID of the relevant comment. 1093 * @return array An array of email addresses that the moderation email will be sent to. 1094 */ 1095 public static function disable_moderation_emails_if_unreachable( $emails, $comment_id ) { 1096 if ( ! empty( self::$prevent_moderation_email_for_these_comments ) && ! empty( $emails ) ) { 1097 $comment = get_comment( $comment_id ); 1098 1099 foreach ( self::$prevent_moderation_email_for_these_comments as $possible_match ) { 1100 if ( self::comments_match( $possible_match, $comment ) ) { 1101 update_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ); 1102 return array(); 1103 } 1104 } 1105 } 1106 1107 return $emails; 1108 } 1109 1110 public static function _cmp_time( $a, $b ) { 1111 return $a['time'] > $b['time'] ? -1 : 1; 1112 } 1113 1114 public static function _get_microtime() { 1115 $mtime = explode( ' ', microtime() ); 1116 return $mtime[1] + $mtime[0]; 1117 } 1118 1119 /** 1120 * Make a POST request to the Akismet API. 1121 * 1122 * @param string $request The body of the request. 1123 * @param string $path The path for the request. 1124 * @param string $ip The specific IP address to hit. 1125 * @return array A two-member array consisting of the headers and the response body, both empty in the case of a failure. 1126 */ 1127 public static function http_post( $request, $path, $ip=null ) { 1128 1129 $akismet_ua = sprintf( 'WordPress/%s | Akismet/%s', $GLOBALS['wp_version'], constant( 'AKISMET_VERSION' ) ); 1130 $akismet_ua = apply_filters( 'akismet_ua', $akismet_ua ); 1131 1132 $content_length = strlen( $request ); 1133 1134 $api_key = self::get_api_key(); 1135 $host = self::API_HOST; 1136 1137 if ( !empty( $api_key ) ) 1138 $host = $api_key.'.'.$host; 1139 1140 $http_host = $host; 1141 // use a specific IP if provided 1142 // needed by Akismet_Admin::check_server_connectivity() 1143 if ( $ip && long2ip( ip2long( $ip ) ) ) { 1144 $http_host = $ip; 1145 } 1146 1147 $http_args = array( 1148 'body' => $request, 1149 'headers' => array( 1150 'Content-Type' => 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' ), 1151 'Host' => $host, 1152 'User-Agent' => $akismet_ua, 1153 ), 1154 'httpversion' => '1.0', 1155 'timeout' => 15 1156 ); 1157 1158 $akismet_url = $http_akismet_url = "http://{$http_host}/1.1/{$path}"; 1159 1160 /** 1161 * Try SSL first; if that fails, try without it and don't try it again for a while. 1162 */ 1163 1164 $ssl = $ssl_failed = false; 1165 1166 // Check if SSL requests were disabled fewer than X hours ago. 1167 $ssl_disabled = get_option( 'akismet_ssl_disabled' ); 1168 1169 if ( $ssl_disabled && $ssl_disabled < ( time() - 60 * 60 * 24 ) ) { // 24 hours 1170 $ssl_disabled = false; 1171 delete_option( 'akismet_ssl_disabled' ); 1172 } 1173 else if ( $ssl_disabled ) { 1174 do_action( 'akismet_ssl_disabled' ); 1175 } 1176 1177 if ( ! $ssl_disabled && ( $ssl = wp_http_supports( array( 'ssl' ) ) ) ) { 1178 $akismet_url = set_url_scheme( $akismet_url, 'https' ); 1179 1180 do_action( 'akismet_https_request_pre' ); 1181 } 1182 1183 $response = wp_remote_post( $akismet_url, $http_args ); 1184 1185 Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) ); 1186 1187 if ( $ssl && is_wp_error( $response ) ) { 1188 do_action( 'akismet_https_request_failure', $response ); 1189 1190 // Intermittent connection problems may cause the first HTTPS 1191 // request to fail and subsequent HTTP requests to succeed randomly. 1192 // Retry the HTTPS request once before disabling SSL for a time. 1193 $response = wp_remote_post( $akismet_url, $http_args ); 1194 1195 Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) ); 1196 1197 if ( is_wp_error( $response ) ) { 1198 $ssl_failed = true; 1199 1200 do_action( 'akismet_https_request_failure', $response ); 1201 1202 do_action( 'akismet_http_request_pre' ); 1203 1204 // Try the request again without SSL. 1205 $response = wp_remote_post( $http_akismet_url, $http_args ); 1206 1207 Akismet::log( compact( 'http_akismet_url', 'http_args', 'response' ) ); 1208 } 1209 } 1210 1211 if ( is_wp_error( $response ) ) { 1212 do_action( 'akismet_request_failure', $response ); 1213 1214 return array( '', '' ); 1215 } 1216 1217 if ( $ssl_failed ) { 1218 // The request failed when using SSL but succeeded without it. Disable SSL for future requests. 1219 update_option( 'akismet_ssl_disabled', time() ); 1220 1221 do_action( 'akismet_https_disabled' ); 1222 } 1223 1224 $simplified_response = array( $response['headers'], $response['body'] ); 1225 1226 self::update_alert( $simplified_response ); 1227 1228 return $simplified_response; 1229 } 1230 1231 // given a response from an API call like check_key_status(), update the alert code options if an alert is present. 1232 public static function update_alert( $response ) { 1233 $code = $msg = null; 1234 if ( isset( $response[0]['x-akismet-alert-code'] ) ) { 1235 $code = $response[0]['x-akismet-alert-code']; 1236 $msg = $response[0]['x-akismet-alert-msg']; 1237 } 1238 1239 // only call update_option() if the value has changed 1240 if ( $code != get_option( 'akismet_alert_code' ) ) { 1241 if ( ! $code ) { 1242 delete_option( 'akismet_alert_code' ); 1243 delete_option( 'akismet_alert_msg' ); 1244 } 1245 else { 1246 update_option( 'akismet_alert_code', $code ); 1247 update_option( 'akismet_alert_msg', $msg ); 1248 } 1249 } 1250 } 1251 1252 public static function load_form_js() { 1253 if ( function_exists( 'is_amp_endpoint' ) && is_amp_endpoint() ) { 1254 return; 1255 } 1256 1257 if ( ! self::get_api_key() ) { 1258 return; 1259 } 1260 1261 wp_register_script( 'akismet-form', plugin_dir_url( __FILE__ ) . '_inc/form.js', array(), AKISMET_VERSION, true ); 1262 wp_enqueue_script( 'akismet-form' ); 1263 } 1264 1265 /** 1266 * Mark form.js as async. Because nothing depends on it, it can run at any time 1267 * after it's loaded, and the browser won't have to wait for it to load to continue 1268 * parsing the rest of the page. 1269 */ 1270 public static function set_form_js_async( $tag, $handle, $src ) { 1271 if ( 'akismet-form' !== $handle ) { 1272 return $tag; 1273 } 1274 1275 return preg_replace( '/^<script /i', '<script async="async" ', $tag ); 1276 } 1277 1278 public static function inject_ak_js( $fields ) { 1279 echo '<p style="display: none;">'; 1280 echo '<input type="hidden" id="ak_js" name="ak_js" value="' . mt_rand( 0, 250 ) . '"/>'; 1281 echo '</p>'; 1282 } 1283 1284 private static function bail_on_activation( $message, $deactivate = true ) { 1285 ?> 1286 <!doctype html> 1287 <html> 1288 <head> 1289 <meta charset="<?php bloginfo( 'charset' ); ?>" /> 1290 <style> 1291 * { 1292 text-align: center; 1293 margin: 0; 1294 padding: 0; 1295 font-family: "Lucida Grande",Verdana,Arial,"Bitstream Vera Sans",sans-serif; 1296 } 1297 p { 1298 margin-top: 1em; 1299 font-size: 18px; 1300 } 1301 </style> 1302 </head> 1303 <body> 1304 <p><?php echo esc_html( $message ); ?></p> 1305 </body> 1306 </html> 1307 <?php 1308 if ( $deactivate ) { 1309 $plugins = get_option( 'active_plugins' ); 1310 $akismet = plugin_basename( AKISMET__PLUGIN_DIR . 'akismet.php' ); 1311 $update = false; 1312 foreach ( $plugins as $i => $plugin ) { 1313 if ( $plugin === $akismet ) { 1314 $plugins[$i] = false; 1315 $update = true; 1316 } 1317 } 1318 1319 if ( $update ) { 1320 update_option( 'active_plugins', array_filter( $plugins ) ); 1321 } 1322 } 1323 exit; 1324 } 1325 1326 public static function view( $name, array $args = array() ) { 1327 $args = apply_filters( 'akismet_view_arguments', $args, $name ); 1328 1329 foreach ( $args AS $key => $val ) { 1330 $$key = $val; 1331 } 1332 1333 load_plugin_textdomain( 'akismet' ); 1334 1335 $file = AKISMET__PLUGIN_DIR . 'views/'. $name . '.php'; 1336 1337 include( $file ); 1338 } 1339 1340 /** 1341 * Attached to activate_{ plugin_basename( __FILES__ ) } by register_activation_hook() 1342 * @static 1343 */ 1344 public static function plugin_activation() { 1345 if ( version_compare( $GLOBALS['wp_version'], AKISMET__MINIMUM_WP_VERSION, '<' ) ) { 1346 load_plugin_textdomain( 'akismet' ); 1347 1348 $message = '<strong>'.sprintf(esc_html__( 'Akismet %s requires WordPress %s or higher.' , 'akismet'), AKISMET_VERSION, AKISMET__MINIMUM_WP_VERSION ).'</strong> '.sprintf(__('Please <a href="%1$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/'); 1349 1350 Akismet::bail_on_activation( $message ); 1351 } elseif ( ! empty( $_SERVER['SCRIPT_NAME'] ) && false !== strpos( $_SERVER['SCRIPT_NAME'], '/wp-admin/plugins.php' ) ) { 1352 add_option( 'Activated_Akismet', true ); 1353 } 1354 } 1355 1356 /** 1357 * Removes all connection options 1358 * @static 1359 */ 1360 public static function plugin_deactivation( ) { 1361 self::deactivate_key( self::get_api_key() ); 1362 1363 // Remove any scheduled cron jobs. 1364 $akismet_cron_events = array( 1365 'akismet_schedule_cron_recheck', 1366 'akismet_scheduled_delete', 1367 ); 1368 1369 foreach ( $akismet_cron_events as $akismet_cron_event ) { 1370 $timestamp = wp_next_scheduled( $akismet_cron_event ); 1371 1372 if ( $timestamp ) { 1373 wp_unschedule_event( $timestamp, $akismet_cron_event ); 1374 } 1375 } 1376 } 1377 1378 /** 1379 * Essentially a copy of WP's build_query but one that doesn't expect pre-urlencoded values. 1380 * 1381 * @param array $args An array of key => value pairs 1382 * @return string A string ready for use as a URL query string. 1383 */ 1384 public static function build_query( $args ) { 1385 return _http_build_query( $args, '', '&' ); 1386 } 1387 1388 /** 1389 * Log debugging info to the error log. 1390 * 1391 * Enabled when WP_DEBUG_LOG is enabled (and WP_DEBUG, since according to 1392 * core, "WP_DEBUG_DISPLAY and WP_DEBUG_LOG perform no function unless 1393 * WP_DEBUG is true), but can be disabled via the akismet_debug_log filter. 1394 * 1395 * @param mixed $akismet_debug The data to log. 1396 */ 1397 public static function log( $akismet_debug ) { 1398 if ( apply_filters( 'akismet_debug_log', defined( 'WP_DEBUG' ) && WP_DEBUG && defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG && defined( 'AKISMET_DEBUG' ) && AKISMET_DEBUG ) ) { 1399 error_log( print_r( compact( 'akismet_debug' ), true ) ); 1400 } 1401 } 1402 1403 public static function pre_check_pingback( $method ) { 1404 if ( $method !== 'pingback.ping' ) 1405 return; 1406 1407 global $wp_xmlrpc_server; 1408 1409 if ( !is_object( $wp_xmlrpc_server ) ) 1410 return false; 1411 1412 // Lame: tightly coupled with the IXR class. 1413 $args = $wp_xmlrpc_server->message->params; 1414 1415 if ( !empty( $args[1] ) ) { 1416 $post_id = url_to_postid( $args[1] ); 1417 1418 // If pingbacks aren't open on this post, we'll still check whether this request is part of a potential DDOS, 1419 // but indicate to the server that pingbacks are indeed closed so we don't include this request in the user's stats, 1420 // since the user has already done their part by disabling pingbacks. 1421 $pingbacks_closed = false; 1422 1423 $post = get_post( $post_id ); 1424 1425 if ( ! $post || ! pings_open( $post ) ) { 1426 $pingbacks_closed = true; 1427 } 1428 1429 $comment = array( 1430 'comment_author_url' => $args[0], 1431 'comment_post_ID' => $post_id, 1432 'comment_author' => '', 1433 'comment_author_email' => '', 1434 'comment_content' => '', 1435 'comment_type' => 'pingback', 1436 'akismet_pre_check' => '1', 1437 'comment_pingback_target' => $args[1], 1438 'pingbacks_closed' => $pingbacks_closed ? '1' : '0', 1439 ); 1440 1441 $comment = Akismet::auto_check_comment( $comment ); 1442 1443 if ( isset( $comment['akismet_result'] ) && 'true' == $comment['akismet_result'] ) { 1444 // Lame: tightly coupled with the IXR classes. Unfortunately the action provides no context and no way to return anything. 1445 $wp_xmlrpc_server->error( new IXR_Error( 0, 'Invalid discovery target' ) ); 1446 } 1447 } 1448 } 1449 1450 /** 1451 * Ensure that we are loading expected scalar values from akismet_as_submitted commentmeta. 1452 * 1453 * @param mixed $meta_value 1454 * @return mixed 1455 */ 1456 private static function sanitize_comment_as_submitted( $meta_value ) { 1457 if ( empty( $meta_value ) ) { 1458 return $meta_value; 1459 } 1460 1461 $meta_value = (array) $meta_value; 1462 1463 foreach ( $meta_value as $key => $value ) { 1464 if ( ! isset( self::$comment_as_submitted_allowed_keys[$key] ) || ! is_scalar( $value ) ) { 1465 unset( $meta_value[$key] ); 1466 } 1467 } 1468 1469 return $meta_value; 1470 } 1471 1472 public static function predefined_api_key() { 1473 if ( defined( 'WPCOM_API_KEY' ) ) { 1474 return true; 1475 } 1476 1477 return apply_filters( 'akismet_predefined_api_key', false ); 1478 } 1479 1480 /** 1481 * Controls the display of a privacy related notice underneath the comment form using the `akismet_comment_form_privacy_notice` option and filter respectively. 1482 * Default is top not display the notice, leaving the choice to site admins, or integrators. 1483 */ 1484 public static function display_comment_form_privacy_notice() { 1485 if ( 'display' !== apply_filters( 'akismet_comment_form_privacy_notice', get_option( 'akismet_comment_form_privacy_notice', 'hide' ) ) ) { 1486 return; 1487 } 1488 echo apply_filters( 1489 'akismet_comment_form_privacy_notice_markup', 1490 '<p class="akismet_comment_form_privacy_notice">' . sprintf( 1491 __( 'This site uses Akismet to reduce spam. <a href="%s" target="_blank" rel="nofollow noopener">Learn how your comment data is processed</a>.', 'akismet' ), 1492 'https://akismet.com/privacy/' 1493 ) . '</p>' 1494 ); 1495 } 1496 }
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| Generated: Mon Jun 1 01:00:03 2020 | Cross-referenced by PHPXref 0.7.1 |