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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( $commentdata ) { 140 self::$last_comment_result = null; 141 142 $comment = $commentdata; 143 144 $comment['user_ip'] = self::get_ip_address(); 145 $comment['user_agent'] = self::get_user_agent(); 146 $comment['referrer'] = self::get_referer(); 147 $comment['blog'] = get_option( 'home' ); 148 $comment['blog_lang'] = get_locale(); 149 $comment['blog_charset'] = get_option('blog_charset'); 150 $comment['permalink'] = get_permalink( $comment['comment_post_ID'] ); 151 152 if ( ! empty( $comment['user_ID'] ) ) { 153 $comment['user_role'] = Akismet::get_user_roles( $comment['user_ID'] ); 154 } 155 156 /** See filter documentation in init_hooks(). */ 157 $akismet_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) ); 158 $comment['akismet_comment_nonce'] = 'inactive'; 159 if ( $akismet_nonce_option == 'true' || $akismet_nonce_option == '' ) { 160 $comment['akismet_comment_nonce'] = 'failed'; 161 if ( isset( $_POST['akismet_comment_nonce'] ) && wp_verify_nonce( $_POST['akismet_comment_nonce'], 'akismet_comment_nonce_' . $comment['comment_post_ID'] ) ) 162 $comment['akismet_comment_nonce'] = 'passed'; 163 164 // comment reply in wp-admin 165 if ( isset( $_POST['_ajax_nonce-replyto-comment'] ) && check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment' ) ) 166 $comment['akismet_comment_nonce'] = 'passed'; 167 168 } 169 170 if ( self::is_test_mode() ) 171 $comment['is_test'] = 'true'; 172 173 foreach( $_POST as $key => $value ) { 174 if ( is_string( $value ) ) 175 $comment["POST_{$key}"] = $value; 176 } 177 178 foreach ( $_SERVER as $key => $value ) { 179 if ( ! is_string( $value ) ) { 180 continue; 181 } 182 183 if ( preg_match( "/^HTTP_COOKIE/", $key ) ) { 184 continue; 185 } 186 187 // Send any potentially useful $_SERVER vars, but avoid sending junk we don't need. 188 if ( preg_match( "/^(HTTP_|REMOTE_ADDR|REQUEST_URI|DOCUMENT_URI)/", $key ) ) { 189 $comment[ "$key" ] = $value; 190 } 191 } 192 193 $post = get_post( $comment['comment_post_ID'] ); 194 195 if ( ! is_null( $post ) ) { 196 // $post can technically be null, although in the past, it's always been an indicator of another plugin interfering. 197 $comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt; 198 } 199 200 $response = self::http_post( Akismet::build_query( $comment ), 'comment-check' ); 201 202 do_action( 'akismet_comment_check_response', $response ); 203 204 $commentdata['comment_as_submitted'] = array_intersect_key( $comment, self::$comment_as_submitted_allowed_keys ); 205 $commentdata['akismet_result'] = $response[1]; 206 207 if ( isset( $response[0]['x-akismet-pro-tip'] ) ) 208 $commentdata['akismet_pro_tip'] = $response[0]['x-akismet-pro-tip']; 209 210 if ( isset( $response[0]['x-akismet-error'] ) ) { 211 // An error occurred that we anticipated (like a suspended key) and want the user to act on. 212 // Send to moderation. 213 self::$last_comment_result = '0'; 214 } 215 else if ( 'true' == $response[1] ) { 216 // akismet_spam_count will be incremented later by comment_is_spam() 217 self::$last_comment_result = 'spam'; 218 219 $discard = ( isset( $commentdata['akismet_pro_tip'] ) && $commentdata['akismet_pro_tip'] === 'discard' && self::allow_discard() ); 220 221 do_action( 'akismet_spam_caught', $discard ); 222 223 if ( $discard ) { 224 // The spam is obvious, so we're bailing out early. 225 // akismet_result_spam() won't be called so bump the counter here 226 if ( $incr = apply_filters( 'akismet_spam_count_incr', 1 ) ) { 227 update_option( 'akismet_spam_count', get_option( 'akismet_spam_count' ) + $incr ); 228 } 229 230 if ( self::$is_rest_api_call ) { 231 return new WP_Error( 'akismet_rest_comment_discarded', __( 'Comment discarded.', 'akismet' ) ); 232 } 233 else { 234 // Redirect back to the previous page, or failing that, the post permalink, or failing that, the homepage of the blog. 235 $redirect_to = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : ( $post ? get_permalink( $post ) : home_url() ); 236 wp_safe_redirect( esc_url_raw( $redirect_to ) ); 237 die(); 238 } 239 } 240 else if ( self::$is_rest_api_call ) { 241 // The way the REST API structures its calls, we can set the comment_approved value right away. 242 $commentdata['comment_approved'] = 'spam'; 243 } 244 } 245 246 // if the response is neither true nor false, hold the comment for moderation and schedule a recheck 247 if ( 'true' != $response[1] && 'false' != $response[1] ) { 248 if ( !current_user_can('moderate_comments') ) { 249 // Comment status should be moderated 250 self::$last_comment_result = '0'; 251 } 252 253 if ( ! wp_next_scheduled( 'akismet_schedule_cron_recheck' ) ) { 254 wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); 255 do_action( 'akismet_scheduled_recheck', 'invalid-response-' . $response[1] ); 256 } 257 258 self::$prevent_moderation_email_for_these_comments[] = $commentdata; 259 } 260 261 // Delete old comments daily 262 if ( ! wp_next_scheduled( 'akismet_scheduled_delete' ) ) { 263 wp_schedule_event( time(), 'daily', 'akismet_scheduled_delete' ); 264 } 265 266 self::set_last_comment( $commentdata ); 267 self::fix_scheduled_recheck(); 268 269 return $commentdata; 270 } 271 272 public static function get_last_comment() { 273 return self::$last_comment; 274 } 275 276 public static function set_last_comment( $comment ) { 277 if ( is_null( $comment ) ) { 278 self::$last_comment = null; 279 } 280 else { 281 // We filter it here so that it matches the filtered comment data that we'll have to compare against later. 282 // wp_filter_comment expects comment_author_IP 283 self::$last_comment = wp_filter_comment( 284 array_merge( 285 array( 'comment_author_IP' => self::get_ip_address() ), 286 $comment 287 ) 288 ); 289 } 290 } 291 292 // this fires on wp_insert_comment. we can't update comment_meta when auto_check_comment() runs 293 // because we don't know the comment ID at that point. 294 public static function auto_check_update_meta( $id, $comment ) { 295 // wp_insert_comment() might be called in other contexts, so make sure this is the same comment 296 // as was checked by auto_check_comment 297 if ( is_object( $comment ) && !empty( self::$last_comment ) && is_array( self::$last_comment ) ) { 298 if ( self::matches_last_comment( $comment ) ) { 299 300 load_plugin_textdomain( 'akismet' ); 301 302 // normal result: true or false 303 if ( self::$last_comment['akismet_result'] == 'true' ) { 304 update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' ); 305 self::update_comment_history( $comment->comment_ID, '', 'check-spam' ); 306 if ( $comment->comment_approved != 'spam' ) 307 self::update_comment_history( 308 $comment->comment_ID, 309 '', 310 'status-changed-'.$comment->comment_approved 311 ); 312 } 313 elseif ( self::$last_comment['akismet_result'] == 'false' ) { 314 update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' ); 315 self::update_comment_history( $comment->comment_ID, '', 'check-ham' ); 316 // Status could be spam or trash, depending on the WP version and whether this change applies: 317 // https://core.trac.wordpress.org/changeset/34726 318 if ( $comment->comment_approved == 'spam' || $comment->comment_approved == 'trash' ) { 319 if ( wp_blacklist_check($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent) ) 320 self::update_comment_history( $comment->comment_ID, '', 'wp-blacklisted' ); 321 else 322 self::update_comment_history( $comment->comment_ID, '', 'status-changed-'.$comment->comment_approved ); 323 } 324 } // abnormal result: error 325 else { 326 update_comment_meta( $comment->comment_ID, 'akismet_error', time() ); 327 self::update_comment_history( 328 $comment->comment_ID, 329 '', 330 'check-error', 331 array( 'response' => substr( self::$last_comment['akismet_result'], 0, 50 ) ) 332 ); 333 } 334 335 // record the complete original data as submitted for checking 336 if ( isset( self::$last_comment['comment_as_submitted'] ) ) 337 update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', self::$last_comment['comment_as_submitted'] ); 338 339 if ( isset( self::$last_comment['akismet_pro_tip'] ) ) 340 update_comment_meta( $comment->comment_ID, 'akismet_pro_tip', self::$last_comment['akismet_pro_tip'] ); 341 } 342 } 343 } 344 345 public static function delete_old_comments() { 346 global $wpdb; 347 348 /** 349 * Determines how many comments will be deleted in each batch. 350 * 351 * @param int The default, as defined by AKISMET_DELETE_LIMIT. 352 */ 353 $delete_limit = apply_filters( 'akismet_delete_comment_limit', defined( 'AKISMET_DELETE_LIMIT' ) ? AKISMET_DELETE_LIMIT : 10000 ); 354 $delete_limit = max( 1, intval( $delete_limit ) ); 355 356 /** 357 * Determines how many days a comment will be left in the Spam queue before being deleted. 358 * 359 * @param int The default number of days. 360 */ 361 $delete_interval = apply_filters( 'akismet_delete_comment_interval', 15 ); 362 $delete_interval = max( 1, intval( $delete_interval ) ); 363 364 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 ) ) ) { 365 if ( empty( $comment_ids ) ) 366 return; 367 368 $wpdb->queries = array(); 369 370 foreach ( $comment_ids as $comment_id ) { 371 do_action( 'delete_comment', $comment_id ); 372 do_action( 'akismet_batch_delete_count', __FUNCTION__ ); 373 } 374 375 // Prepared as strings since comment_id is an unsigned BIGINT, and using %d will constrain the value to the maximum signed BIGINT. 376 $format_string = implode( ", ", array_fill( 0, count( $comment_ids ), '%s' ) ); 377 378 $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->comments} WHERE comment_id IN ( " . $format_string . " )", $comment_ids ) ); 379 $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->commentmeta} WHERE comment_id IN ( " . $format_string . " )", $comment_ids ) ); 380 381 clean_comment_cache( $comment_ids ); 382 do_action( 'akismet_delete_comment_batch', count( $comment_ids ) ); 383 } 384 385 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->comments ) ) // lucky number 386 $wpdb->query("OPTIMIZE TABLE {$wpdb->comments}"); 387 } 388 389 public static function delete_old_comments_meta() { 390 global $wpdb; 391 392 $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 ); 393 394 # enforce a minimum of 1 day 395 $interval = absint( $interval ); 396 if ( $interval < 1 ) 397 $interval = 1; 398 399 // akismet_as_submitted meta values are large, so expire them 400 // after $interval days regardless of the comment status 401 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 ) ) ) { 402 if ( empty( $comment_ids ) ) 403 return; 404 405 $wpdb->queries = array(); 406 407 foreach ( $comment_ids as $comment_id ) { 408 delete_comment_meta( $comment_id, 'akismet_as_submitted' ); 409 do_action( 'akismet_batch_delete_count', __FUNCTION__ ); 410 } 411 412 do_action( 'akismet_delete_commentmeta_batch', count( $comment_ids ) ); 413 } 414 415 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number 416 $wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}"); 417 } 418 419 // Clear out comments meta that no longer have corresponding comments in the database 420 public static function delete_orphaned_commentmeta() { 421 global $wpdb; 422 423 $last_meta_id = 0; 424 $start_time = isset( $_SERVER['REQUEST_TIME_FLOAT'] ) ? $_SERVER['REQUEST_TIME_FLOAT'] : microtime( true ); 425 $max_exec_time = max( ini_get('max_execution_time') - 5, 3 ); 426 427 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 ) ) ) { 428 if ( empty( $commentmeta_results ) ) 429 return; 430 431 $wpdb->queries = array(); 432 433 $commentmeta_deleted = 0; 434 435 foreach ( $commentmeta_results as $commentmeta ) { 436 if ( 'akismet_' == substr( $commentmeta->meta_key, 0, 8 ) ) { 437 delete_comment_meta( $commentmeta->comment_id, $commentmeta->meta_key ); 438 do_action( 'akismet_batch_delete_count', __FUNCTION__ ); 439 $commentmeta_deleted++; 440 } 441 442 $last_meta_id = $commentmeta->meta_id; 443 } 444 445 do_action( 'akismet_delete_commentmeta_batch', $commentmeta_deleted ); 446 447 // If we're getting close to max_execution_time, quit for this round. 448 if ( microtime(true) - $start_time > $max_exec_time ) 449 return; 450 } 451 452 if ( apply_filters( 'akismet_optimize_table', ( mt_rand(1, 5000) == 11), $wpdb->commentmeta ) ) // lucky number 453 $wpdb->query("OPTIMIZE TABLE {$wpdb->commentmeta}"); 454 } 455 456 // how many approved comments does this author have? 457 public static function get_user_comments_approved( $user_id, $comment_author_email, $comment_author, $comment_author_url ) { 458 global $wpdb; 459 460 if ( !empty( $user_id ) ) 461 return (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM {$wpdb->comments} WHERE user_id = %d AND comment_approved = 1", $user_id ) ); 462 463 if ( !empty( $comment_author_email ) ) 464 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 ) ); 465 466 return 0; 467 } 468 469 // get the full comment history for a given comment, as an array in reverse chronological order 470 public static function get_comment_history( $comment_id ) { 471 $history = get_comment_meta( $comment_id, 'akismet_history', false ); 472 usort( $history, array( 'Akismet', '_cmp_time' ) ); 473 return $history; 474 } 475 476 /** 477 * Log an event for a given comment, storing it in comment_meta. 478 * 479 * @param int $comment_id The ID of the relevant comment. 480 * @param string $message The string description of the event. No longer used. 481 * @param string $event The event code. 482 * @param array $meta Metadata about the history entry. e.g., the user that reported or changed the status of a given comment. 483 */ 484 public static function update_comment_history( $comment_id, $message, $event=null, $meta=null ) { 485 global $current_user; 486 487 $user = ''; 488 489 $event = array( 490 'time' => self::_get_microtime(), 491 'event' => $event, 492 ); 493 494 if ( is_object( $current_user ) && isset( $current_user->user_login ) ) { 495 $event['user'] = $current_user->user_login; 496 } 497 498 if ( ! empty( $meta ) ) { 499 $event['meta'] = $meta; 500 } 501 502 // $unique = false so as to allow multiple values per comment 503 $r = add_comment_meta( $comment_id, 'akismet_history', $event, false ); 504 } 505 506 public static function check_db_comment( $id, $recheck_reason = 'recheck_queue' ) { 507 global $wpdb; 508 509 $c = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $id ), ARRAY_A ); 510 511 if ( ! $c ) { 512 return new WP_Error( 'invalid-comment-id', __( 'Comment not found.', 'akismet' ) ); 513 } 514 515 $c['user_ip'] = $c['comment_author_IP']; 516 $c['user_agent'] = $c['comment_agent']; 517 $c['referrer'] = ''; 518 $c['blog'] = get_option( 'home' ); 519 $c['blog_lang'] = get_locale(); 520 $c['blog_charset'] = get_option('blog_charset'); 521 $c['permalink'] = get_permalink($c['comment_post_ID']); 522 $c['recheck_reason'] = $recheck_reason; 523 524 $c['user_role'] = ''; 525 if ( ! empty( $c['user_ID'] ) ) { 526 $c['user_role'] = Akismet::get_user_roles( $c['user_ID'] ); 527 } 528 529 if ( self::is_test_mode() ) 530 $c['is_test'] = 'true'; 531 532 $response = self::http_post( Akismet::build_query( $c ), 'comment-check' ); 533 534 if ( ! empty( $response[1] ) ) { 535 return $response[1]; 536 } 537 538 return false; 539 } 540 541 public static function recheck_comment( $id, $recheck_reason = 'recheck_queue' ) { 542 add_comment_meta( $id, 'akismet_rechecking', true ); 543 544 $api_response = self::check_db_comment( $id, $recheck_reason ); 545 546 delete_comment_meta( $id, 'akismet_rechecking' ); 547 548 if ( is_wp_error( $api_response ) ) { 549 // Invalid comment ID. 550 } 551 else if ( 'true' === $api_response ) { 552 wp_set_comment_status( $id, 'spam' ); 553 update_comment_meta( $id, 'akismet_result', 'true' ); 554 delete_comment_meta( $id, 'akismet_error' ); 555 delete_comment_meta( $id, 'akismet_delayed_moderation_email' ); 556 Akismet::update_comment_history( $id, '', 'recheck-spam' ); 557 } 558 elseif ( 'false' === $api_response ) { 559 update_comment_meta( $id, 'akismet_result', 'false' ); 560 delete_comment_meta( $id, 'akismet_error' ); 561 delete_comment_meta( $id, 'akismet_delayed_moderation_email' ); 562 Akismet::update_comment_history( $id, '', 'recheck-ham' ); 563 } 564 else { 565 // abnormal result: error 566 update_comment_meta( $id, 'akismet_result', 'error' ); 567 Akismet::update_comment_history( 568 $id, 569 '', 570 'recheck-error', 571 array( 'response' => substr( $api_response, 0, 50 ) ) 572 ); 573 } 574 575 return $api_response; 576 } 577 578 public static function transition_comment_status( $new_status, $old_status, $comment ) { 579 580 if ( $new_status == $old_status ) 581 return; 582 583 if ( 'spam' === $new_status || 'spam' === $old_status ) { 584 // Clear the cache of the "X comments in your spam queue" count on the dashboard. 585 wp_cache_delete( 'akismet_spam_count', 'widget' ); 586 } 587 588 # we don't need to record a history item for deleted comments 589 if ( $new_status == 'delete' ) 590 return; 591 592 if ( !current_user_can( 'edit_post', $comment->comment_post_ID ) && !current_user_can( 'moderate_comments' ) ) 593 return; 594 595 if ( defined('WP_IMPORTING') && WP_IMPORTING == true ) 596 return; 597 598 // if this is present, it means the status has been changed by a re-check, not an explicit user action 599 if ( get_comment_meta( $comment->comment_ID, 'akismet_rechecking' ) ) 600 return; 601 602 // Assumption alert: 603 // We want to submit comments to Akismet only when a moderator explicitly spams or approves it - not if the status 604 // is changed automatically by another plugin. Unfortunately WordPress doesn't provide an unambiguous way to 605 // determine why the transition_comment_status action was triggered. And there are several different ways by which 606 // to spam and unspam comments: bulk actions, ajax, links in moderation emails, the dashboard, and perhaps others. 607 // We'll assume that this is an explicit user action if certain POST/GET variables exist. 608 if ( 609 // status=spam: Marking as spam via the REST API or... 610 // 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?... 611 // status=approved: Unspamming via the REST API (Calypso) or... 612 ( isset( $_POST['status'] ) && in_array( $_POST['status'], array( 'spam', 'unspam', 'approved', ) ) ) 613 // spam=1: Clicking "Spam" underneath a comment in wp-admin and allowing the AJAX request to happen. 614 || ( isset( $_POST['spam'] ) && (int) $_POST['spam'] == 1 ) 615 // 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. 616 || ( isset( $_POST['unspam'] ) && (int) $_POST['unspam'] == 1 ) 617 // comment_status=spam/unspam: It's unclear where this is happening. 618 || ( isset( $_POST['comment_status'] ) && in_array( $_POST['comment_status'], array( 'spam', 'unspam' ) ) ) 619 // action=spam: Choosing "Mark as Spam" from the Bulk Actions dropdown in wp-admin (or the "Spam it" link in notification emails). 620 // action=unspam: Choosing "Not Spam" from the Bulk Actions dropdown in wp-admin. 621 // action=spamcomment: Following the "Spam" link below a comment in wp-admin (not allowing AJAX request to happen). 622 // action=unspamcomment: Following the "Not Spam" link below a comment in wp-admin (not allowing AJAX request to happen). 623 || ( isset( $_GET['action'] ) && in_array( $_GET['action'], array( 'spam', 'unspam', 'spamcomment', 'unspamcomment', ) ) ) 624 // action=editedcomment: Editing a comment via wp-admin (and possibly changing its status). 625 || ( isset( $_POST['action'] ) && in_array( $_POST['action'], array( 'editedcomment' ) ) ) 626 // for=jetpack: Moderation via the WordPress app, Calypso, anything powered by the Jetpack connection. 627 || ( isset( $_GET['for'] ) && ( 'jetpack' == $_GET['for'] ) && ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) ) 628 // Certain WordPress.com API requests 629 || ( defined( 'REST_API_REQUEST' ) && REST_API_REQUEST ) 630 // WordPress.org REST API requests 631 || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) 632 ) { 633 if ( $new_status == 'spam' && ( $old_status == 'approved' || $old_status == 'unapproved' || !$old_status ) ) { 634 return self::submit_spam_comment( $comment->comment_ID ); 635 } elseif ( $old_status == 'spam' && ( $new_status == 'approved' || $new_status == 'unapproved' ) ) { 636 return self::submit_nonspam_comment( $comment->comment_ID ); 637 } 638 } 639 640 self::update_comment_history( $comment->comment_ID, '', 'status-' . $new_status ); 641 } 642 643 public static function submit_spam_comment( $comment_id ) { 644 global $wpdb, $current_user, $current_site; 645 646 $comment_id = (int) $comment_id; 647 648 $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) ); 649 650 if ( !$comment ) // it was deleted 651 return; 652 653 if ( 'spam' != $comment->comment_approved ) 654 return; 655 656 // use the original version stored in comment_meta if available 657 $as_submitted = self::sanitize_comment_as_submitted( get_comment_meta( $comment_id, 'akismet_as_submitted', true ) ); 658 659 if ( $as_submitted && is_array( $as_submitted ) && isset( $as_submitted['comment_content'] ) ) 660 $comment = (object) array_merge( (array)$comment, $as_submitted ); 661 662 $comment->blog = get_option( 'home' ); 663 $comment->blog_lang = get_locale(); 664 $comment->blog_charset = get_option('blog_charset'); 665 $comment->permalink = get_permalink($comment->comment_post_ID); 666 667 if ( is_object($current_user) ) 668 $comment->reporter = $current_user->user_login; 669 670 if ( is_object($current_site) ) 671 $comment->site_domain = $current_site->domain; 672 673 $comment->user_role = ''; 674 if ( ! empty( $comment->user_ID ) ) { 675 $comment->user_role = Akismet::get_user_roles( $comment->user_ID ); 676 } 677 678 if ( self::is_test_mode() ) 679 $comment->is_test = 'true'; 680 681 $post = get_post( $comment->comment_post_ID ); 682 683 if ( ! is_null( $post ) ) { 684 $comment->comment_post_modified_gmt = $post->post_modified_gmt; 685 } 686 687 $response = Akismet::http_post( Akismet::build_query( $comment ), 'submit-spam' ); 688 if ( $comment->reporter ) { 689 self::update_comment_history( $comment_id, '', 'report-spam' ); 690 update_comment_meta( $comment_id, 'akismet_user_result', 'true' ); 691 update_comment_meta( $comment_id, 'akismet_user', $comment->reporter ); 692 } 693 694 do_action('akismet_submit_spam_comment', $comment_id, $response[1]); 695 } 696 697 public static function submit_nonspam_comment( $comment_id ) { 698 global $wpdb, $current_user, $current_site; 699 700 $comment_id = (int) $comment_id; 701 702 $comment = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->comments} WHERE comment_ID = %d", $comment_id ) ); 703 if ( !$comment ) // it was deleted 704 return; 705 706 // use the original version stored in comment_meta if available 707 $as_submitted = self::sanitize_comment_as_submitted( get_comment_meta( $comment_id, 'akismet_as_submitted', true ) ); 708 709 if ( $as_submitted && is_array($as_submitted) && isset($as_submitted['comment_content']) ) 710 $comment = (object) array_merge( (array)$comment, $as_submitted ); 711 712 $comment->blog = get_option( 'home' ); 713 $comment->blog_lang = get_locale(); 714 $comment->blog_charset = get_option('blog_charset'); 715 $comment->permalink = get_permalink( $comment->comment_post_ID ); 716 $comment->user_role = ''; 717 718 if ( is_object($current_user) ) 719 $comment->reporter = $current_user->user_login; 720 721 if ( is_object($current_site) ) 722 $comment->site_domain = $current_site->domain; 723 724 if ( ! empty( $comment->user_ID ) ) { 725 $comment->user_role = Akismet::get_user_roles( $comment->user_ID ); 726 } 727 728 if ( Akismet::is_test_mode() ) 729 $comment->is_test = 'true'; 730 731 $post = get_post( $comment->comment_post_ID ); 732 733 if ( ! is_null( $post ) ) { 734 $comment->comment_post_modified_gmt = $post->post_modified_gmt; 735 } 736 737 $response = self::http_post( Akismet::build_query( $comment ), 'submit-ham' ); 738 if ( $comment->reporter ) { 739 self::update_comment_history( $comment_id, '', 'report-ham' ); 740 update_comment_meta( $comment_id, 'akismet_user_result', 'false' ); 741 update_comment_meta( $comment_id, 'akismet_user', $comment->reporter ); 742 } 743 744 do_action('akismet_submit_nonspam_comment', $comment_id, $response[1]); 745 } 746 747 public static function cron_recheck() { 748 global $wpdb; 749 750 $api_key = self::get_api_key(); 751 752 $status = self::verify_key( $api_key ); 753 if ( get_option( 'akismet_alert_code' ) || $status == 'invalid' ) { 754 // since there is currently a problem with the key, reschedule a check for 6 hours hence 755 wp_schedule_single_event( time() + 21600, 'akismet_schedule_cron_recheck' ); 756 do_action( 'akismet_scheduled_recheck', 'key-problem-' . get_option( 'akismet_alert_code' ) . '-' . $status ); 757 return false; 758 } 759 760 delete_option('akismet_available_servers'); 761 762 $comment_errors = $wpdb->get_col( "SELECT comment_id FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error' LIMIT 100" ); 763 764 load_plugin_textdomain( 'akismet' ); 765 766 foreach ( (array) $comment_errors as $comment_id ) { 767 // if the comment no longer exists, or is too old, remove the meta entry from the queue to avoid getting stuck 768 $comment = get_comment( $comment_id ); 769 770 if ( 771 ! $comment // Comment has been deleted 772 || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) // Comment is too old. 773 || $comment->comment_approved !== "0" // Comment is no longer in the Pending queue 774 ) { 775 delete_comment_meta( $comment_id, 'akismet_error' ); 776 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); 777 continue; 778 } 779 780 add_comment_meta( $comment_id, 'akismet_rechecking', true ); 781 $status = self::check_db_comment( $comment_id, 'retry' ); 782 783 $event = ''; 784 if ( $status == 'true' ) { 785 $event = 'cron-retry-spam'; 786 } elseif ( $status == 'false' ) { 787 $event = 'cron-retry-ham'; 788 } 789 790 // If we got back a legit response then update the comment history 791 // other wise just bail now and try again later. No point in 792 // re-trying all the comments once we hit one failure. 793 if ( !empty( $event ) ) { 794 delete_comment_meta( $comment_id, 'akismet_error' ); 795 self::update_comment_history( $comment_id, '', $event ); 796 update_comment_meta( $comment_id, 'akismet_result', $status ); 797 // make sure the comment status is still pending. if it isn't, that means the user has already moved it elsewhere. 798 $comment = get_comment( $comment_id ); 799 if ( $comment && 'unapproved' == wp_get_comment_status( $comment_id ) ) { 800 if ( $status == 'true' ) { 801 wp_spam_comment( $comment_id ); 802 } elseif ( $status == 'false' ) { 803 // comment is good, but it's still in the pending queue. depending on the moderation settings 804 // we may need to change it to approved. 805 if ( check_comment($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent, $comment->comment_type) ) 806 wp_set_comment_status( $comment_id, 1 ); 807 else if ( get_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ) ) 808 wp_notify_moderator( $comment_id ); 809 } 810 } 811 812 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); 813 } else { 814 // If this comment has been pending moderation for longer than MAX_DELAY_BEFORE_MODERATION_EMAIL, 815 // send a moderation email now. 816 if ( ( intval( gmdate( 'U' ) ) - strtotime( $comment->comment_date_gmt ) ) < self::MAX_DELAY_BEFORE_MODERATION_EMAIL ) { 817 delete_comment_meta( $comment_id, 'akismet_delayed_moderation_email' ); 818 wp_notify_moderator( $comment_id ); 819 } 820 821 delete_comment_meta( $comment_id, 'akismet_rechecking' ); 822 wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); 823 do_action( 'akismet_scheduled_recheck', 'check-db-comment-' . $status ); 824 return; 825 } 826 delete_comment_meta( $comment_id, 'akismet_rechecking' ); 827 } 828 829 $remaining = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->commentmeta} WHERE meta_key = 'akismet_error'" ); 830 if ( $remaining && !wp_next_scheduled('akismet_schedule_cron_recheck') ) { 831 wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' ); 832 do_action( 'akismet_scheduled_recheck', 'remaining' ); 833 } 834 } 835 836 public static function fix_scheduled_recheck() { 837 $future_check = wp_next_scheduled( 'akismet_schedule_cron_recheck' ); 838 if ( !$future_check ) { 839 return; 840 } 841 842 if ( get_option( 'akismet_alert_code' ) > 0 ) { 843 return; 844 } 845 846 $check_range = time() + 1200; 847 if ( $future_check > $check_range ) { 848 wp_clear_scheduled_hook( 'akismet_schedule_cron_recheck' ); 849 wp_schedule_single_event( time() + 300, 'akismet_schedule_cron_recheck' ); 850 do_action( 'akismet_scheduled_recheck', 'fix-scheduled-recheck' ); 851 } 852 } 853 854 public static function add_comment_nonce( $post_id ) { 855 /** 856 * To disable the Akismet comment nonce, add a filter for the 'akismet_comment_nonce' tag 857 * and return any string value that is not 'true' or '' (empty string). 858 * 859 * Don't return boolean false, because that implies that the 'akismet_comment_nonce' option 860 * has not been set and that Akismet should just choose the default behavior for that 861 * situation. 862 */ 863 $akismet_comment_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) ); 864 865 if ( $akismet_comment_nonce_option == 'true' || $akismet_comment_nonce_option == '' ) { 866 echo '<p style="display: none;">'; 867 wp_nonce_field( 'akismet_comment_nonce_' . $post_id, 'akismet_comment_nonce', FALSE ); 868 echo '</p>'; 869 } 870 } 871 872 public static function is_test_mode() { 873 return defined('AKISMET_TEST_MODE') && AKISMET_TEST_MODE; 874 } 875 876 public static function allow_discard() { 877 if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) 878 return false; 879 if ( is_user_logged_in() ) 880 return false; 881 882 return ( get_option( 'akismet_strictness' ) === '1' ); 883 } 884 885 public static function get_ip_address() { 886 return isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : null; 887 } 888 889 /** 890 * Do these two comments, without checking the comment_ID, "match"? 891 * 892 * @param mixed $comment1 A comment object or array. 893 * @param mixed $comment2 A comment object or array. 894 * @return bool Whether the two comments should be treated as the same comment. 895 */ 896 private static function comments_match( $comment1, $comment2 ) { 897 $comment1 = (array) $comment1; 898 $comment2 = (array) $comment2; 899 900 // Set default values for these strings that we check in order to simplify 901 // the checks and avoid PHP warnings. 902 if ( ! isset( $comment1['comment_author'] ) ) { 903 $comment1['comment_author'] = ''; 904 } 905 906 if ( ! isset( $comment2['comment_author'] ) ) { 907 $comment2['comment_author'] = ''; 908 } 909 910 if ( ! isset( $comment1['comment_author_email'] ) ) { 911 $comment1['comment_author_email'] = ''; 912 } 913 914 if ( ! isset( $comment2['comment_author_email'] ) ) { 915 $comment2['comment_author_email'] = ''; 916 } 917 918 $comments_match = ( 919 isset( $comment1['comment_post_ID'], $comment2['comment_post_ID'] ) 920 && intval( $comment1['comment_post_ID'] ) == intval( $comment2['comment_post_ID'] ) 921 && ( 922 // The comment author length max is 255 characters, limited by the TINYTEXT column type. 923 // If the comment author includes multibyte characters right around the 255-byte mark, they 924 // may be stripped when the author is saved in the DB, so a 300+ char author may turn into 925 // a 253-char author when it's saved, not 255 exactly. The longest possible character is 926 // theoretically 6 bytes, so we'll only look at the first 248 bytes to be safe. 927 substr( $comment1['comment_author'], 0, 248 ) == substr( $comment2['comment_author'], 0, 248 ) 928 || substr( stripslashes( $comment1['comment_author'] ), 0, 248 ) == substr( $comment2['comment_author'], 0, 248 ) 929 || substr( $comment1['comment_author'], 0, 248 ) == substr( stripslashes( $comment2['comment_author'] ), 0, 248 ) 930 // Certain long comment author names will be truncated to nothing, depending on their encoding. 931 || ( ! $comment1['comment_author'] && strlen( $comment2['comment_author'] ) > 248 ) 932 || ( ! $comment2['comment_author'] && strlen( $comment1['comment_author'] ) > 248 ) 933 ) 934 && ( 935 // The email max length is 100 characters, limited by the VARCHAR(100) column type. 936 // Same argument as above for only looking at the first 93 characters. 937 substr( $comment1['comment_author_email'], 0, 93 ) == substr( $comment2['comment_author_email'], 0, 93 ) 938 || substr( stripslashes( $comment1['comment_author_email'] ), 0, 93 ) == substr( $comment2['comment_author_email'], 0, 93 ) 939 || substr( $comment1['comment_author_email'], 0, 93 ) == substr( stripslashes( $comment2['comment_author_email'] ), 0, 93 ) 940 // Very long emails can be truncated and then stripped if the [0:100] substring isn't a valid address. 941 || ( ! $comment1['comment_author_email'] && strlen( $comment2['comment_author_email'] ) > 100 ) 942 || ( ! $comment2['comment_author_email'] && strlen( $comment1['comment_author_email'] ) > 100 ) 943 ) 944 ); 945 946 return $comments_match; 947 } 948 949 // Does the supplied comment match the details of the one most recently stored in self::$last_comment? 950 public static function matches_last_comment( $comment ) { 951 return self::comments_match( self::$last_comment, $comment ); 952 } 953 954 private static function get_user_agent() { 955 return isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : null; 956 } 957 958 private static function get_referer() { 959 return isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : null; 960 } 961 962 // return a comma-separated list of role names for the given user 963 public static function get_user_roles( $user_id ) { 964 $roles = false; 965 966 if ( !class_exists('WP_User') ) 967 return false; 968 969 if ( $user_id > 0 ) { 970 $comment_user = new WP_User( $user_id ); 971 if ( isset( $comment_user->roles ) ) 972 $roles = join( ',', $comment_user->roles ); 973 } 974 975 if ( is_multisite() && is_super_admin( $user_id ) ) { 976 if ( empty( $roles ) ) { 977 $roles = 'super_admin'; 978 } else { 979 $comment_user->roles[] = 'super_admin'; 980 $roles = join( ',', $comment_user->roles ); 981 } 982 } 983 984 return $roles; 985 } 986 987 // filter handler used to return a spam result to pre_comment_approved 988 public static function last_comment_status( $approved, $comment ) { 989 if ( is_null( self::$last_comment_result ) ) { 990 // We didn't have reason to store the result of the last check. 991 return $approved; 992 } 993 994 // Only do this if it's the correct comment 995 if ( ! self::matches_last_comment( $comment ) ) { 996 self::log( "comment_is_spam mismatched comment, returning unaltered $approved" ); 997 return $approved; 998 } 999 1000 if ( 'trash' === $approved ) { 1001 // If the last comment we checked has had its approval set to 'trash', 1002 // then it failed the comment blacklist check. Let that blacklist override 1003 // the spam check, since users have the (valid) expectation that when 1004 // they fill out their blacklists, comments that match it will always 1005 // end up in the trash. 1006 return $approved; 1007 } 1008 1009 // bump the counter here instead of when the filter is added to reduce the possibility of overcounting 1010 if ( $incr = apply_filters('akismet_spam_count_incr', 1) ) 1011 update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr ); 1012 1013 return self::$last_comment_result; 1014 } 1015 1016 /** 1017 * If Akismet is temporarily unreachable, we don't want to "spam" the blogger with 1018 * moderation emails for comments that will be automatically cleared or spammed on 1019 * the next retry. 1020 * 1021 * For comments that will be rechecked later, empty the list of email addresses that 1022 * the moderation email would be sent to. 1023 * 1024 * @param array $emails An array of email addresses that the moderation email will be sent to. 1025 * @param int $comment_id The ID of the relevant comment. 1026 * @return array An array of email addresses that the moderation email will be sent to. 1027 */ 1028 public static function disable_moderation_emails_if_unreachable( $emails, $comment_id ) { 1029 if ( ! empty( self::$prevent_moderation_email_for_these_comments ) && ! empty( $emails ) ) { 1030 $comment = get_comment( $comment_id ); 1031 1032 foreach ( self::$prevent_moderation_email_for_these_comments as $possible_match ) { 1033 if ( self::comments_match( $possible_match, $comment ) ) { 1034 update_comment_meta( $comment_id, 'akismet_delayed_moderation_email', true ); 1035 return array(); 1036 } 1037 } 1038 } 1039 1040 return $emails; 1041 } 1042 1043 public static function _cmp_time( $a, $b ) { 1044 return $a['time'] > $b['time'] ? -1 : 1; 1045 } 1046 1047 public static function _get_microtime() { 1048 $mtime = explode( ' ', microtime() ); 1049 return $mtime[1] + $mtime[0]; 1050 } 1051 1052 /** 1053 * Make a POST request to the Akismet API. 1054 * 1055 * @param string $request The body of the request. 1056 * @param string $path The path for the request. 1057 * @param string $ip The specific IP address to hit. 1058 * @return array A two-member array consisting of the headers and the response body, both empty in the case of a failure. 1059 */ 1060 public static function http_post( $request, $path, $ip=null ) { 1061 1062 $akismet_ua = sprintf( 'WordPress/%s | Akismet/%s', $GLOBALS['wp_version'], constant( 'AKISMET_VERSION' ) ); 1063 $akismet_ua = apply_filters( 'akismet_ua', $akismet_ua ); 1064 1065 $content_length = strlen( $request ); 1066 1067 $api_key = self::get_api_key(); 1068 $host = self::API_HOST; 1069 1070 if ( !empty( $api_key ) ) 1071 $host = $api_key.'.'.$host; 1072 1073 $http_host = $host; 1074 // use a specific IP if provided 1075 // needed by Akismet_Admin::check_server_connectivity() 1076 if ( $ip && long2ip( ip2long( $ip ) ) ) { 1077 $http_host = $ip; 1078 } 1079 1080 $http_args = array( 1081 'body' => $request, 1082 'headers' => array( 1083 'Content-Type' => 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' ), 1084 'Host' => $host, 1085 'User-Agent' => $akismet_ua, 1086 ), 1087 'httpversion' => '1.0', 1088 'timeout' => 15 1089 ); 1090 1091 $akismet_url = $http_akismet_url = "http://{$http_host}/1.1/{$path}"; 1092 1093 /** 1094 * Try SSL first; if that fails, try without it and don't try it again for a while. 1095 */ 1096 1097 $ssl = $ssl_failed = false; 1098 1099 // Check if SSL requests were disabled fewer than X hours ago. 1100 $ssl_disabled = get_option( 'akismet_ssl_disabled' ); 1101 1102 if ( $ssl_disabled && $ssl_disabled < ( time() - 60 * 60 * 24 ) ) { // 24 hours 1103 $ssl_disabled = false; 1104 delete_option( 'akismet_ssl_disabled' ); 1105 } 1106 else if ( $ssl_disabled ) { 1107 do_action( 'akismet_ssl_disabled' ); 1108 } 1109 1110 if ( ! $ssl_disabled && ( $ssl = wp_http_supports( array( 'ssl' ) ) ) ) { 1111 $akismet_url = set_url_scheme( $akismet_url, 'https' ); 1112 1113 do_action( 'akismet_https_request_pre' ); 1114 } 1115 1116 $response = wp_remote_post( $akismet_url, $http_args ); 1117 1118 Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) ); 1119 1120 if ( $ssl && is_wp_error( $response ) ) { 1121 do_action( 'akismet_https_request_failure', $response ); 1122 1123 // Intermittent connection problems may cause the first HTTPS 1124 // request to fail and subsequent HTTP requests to succeed randomly. 1125 // Retry the HTTPS request once before disabling SSL for a time. 1126 $response = wp_remote_post( $akismet_url, $http_args ); 1127 1128 Akismet::log( compact( 'akismet_url', 'http_args', 'response' ) ); 1129 1130 if ( is_wp_error( $response ) ) { 1131 $ssl_failed = true; 1132 1133 do_action( 'akismet_https_request_failure', $response ); 1134 1135 do_action( 'akismet_http_request_pre' ); 1136 1137 // Try the request again without SSL. 1138 $response = wp_remote_post( $http_akismet_url, $http_args ); 1139 1140 Akismet::log( compact( 'http_akismet_url', 'http_args', 'response' ) ); 1141 } 1142 } 1143 1144 if ( is_wp_error( $response ) ) { 1145 do_action( 'akismet_request_failure', $response ); 1146 1147 return array( '', '' ); 1148 } 1149 1150 if ( $ssl_failed ) { 1151 // The request failed when using SSL but succeeded without it. Disable SSL for future requests. 1152 update_option( 'akismet_ssl_disabled', time() ); 1153 1154 do_action( 'akismet_https_disabled' ); 1155 } 1156 1157 $simplified_response = array( $response['headers'], $response['body'] ); 1158 1159 self::update_alert( $simplified_response ); 1160 1161 return $simplified_response; 1162 } 1163 1164 // given a response from an API call like check_key_status(), update the alert code options if an alert is present. 1165 public static function update_alert( $response ) { 1166 $code = $msg = null; 1167 if ( isset( $response[0]['x-akismet-alert-code'] ) ) { 1168 $code = $response[0]['x-akismet-alert-code']; 1169 $msg = $response[0]['x-akismet-alert-msg']; 1170 } 1171 1172 // only call update_option() if the value has changed 1173 if ( $code != get_option( 'akismet_alert_code' ) ) { 1174 if ( ! $code ) { 1175 delete_option( 'akismet_alert_code' ); 1176 delete_option( 'akismet_alert_msg' ); 1177 } 1178 else { 1179 update_option( 'akismet_alert_code', $code ); 1180 update_option( 'akismet_alert_msg', $msg ); 1181 } 1182 } 1183 } 1184 1185 public static function load_form_js() { 1186 if ( function_exists( 'is_amp_endpoint' ) && is_amp_endpoint() ) { 1187 return; 1188 } 1189 1190 wp_register_script( 'akismet-form', plugin_dir_url( __FILE__ ) . '_inc/form.js', array(), AKISMET_VERSION, true ); 1191 wp_enqueue_script( 'akismet-form' ); 1192 } 1193 1194 /** 1195 * Mark form.js as async. Because nothing depends on it, it can run at any time 1196 * after it's loaded, and the browser won't have to wait for it to load to continue 1197 * parsing the rest of the page. 1198 */ 1199 public static function set_form_js_async( $tag, $handle, $src ) { 1200 if ( 'akismet-form' !== $handle ) { 1201 return $tag; 1202 } 1203 1204 return preg_replace( '/^<script /i', '<script async="async" ', $tag ); 1205 } 1206 1207 public static function inject_ak_js( $fields ) { 1208 echo '<p style="display: none;">'; 1209 echo '<input type="hidden" id="ak_js" name="ak_js" value="' . mt_rand( 0, 250 ) . '"/>'; 1210 echo '</p>'; 1211 } 1212 1213 private static function bail_on_activation( $message, $deactivate = true ) { 1214 ?> 1215 <!doctype html> 1216 <html> 1217 <head> 1218 <meta charset="<?php bloginfo( 'charset' ); ?>" /> 1219 <style> 1220 * { 1221 text-align: center; 1222 margin: 0; 1223 padding: 0; 1224 font-family: "Lucida Grande",Verdana,Arial,"Bitstream Vera Sans",sans-serif; 1225 } 1226 p { 1227 margin-top: 1em; 1228 font-size: 18px; 1229 } 1230 </style> 1231 </head> 1232 <body> 1233 <p><?php echo esc_html( $message ); ?></p> 1234 </body> 1235 </html> 1236 <?php 1237 if ( $deactivate ) { 1238 $plugins = get_option( 'active_plugins' ); 1239 $akismet = plugin_basename( AKISMET__PLUGIN_DIR . 'akismet.php' ); 1240 $update = false; 1241 foreach ( $plugins as $i => $plugin ) { 1242 if ( $plugin === $akismet ) { 1243 $plugins[$i] = false; 1244 $update = true; 1245 } 1246 } 1247 1248 if ( $update ) { 1249 update_option( 'active_plugins', array_filter( $plugins ) ); 1250 } 1251 } 1252 exit; 1253 } 1254 1255 public static function view( $name, array $args = array() ) { 1256 $args = apply_filters( 'akismet_view_arguments', $args, $name ); 1257 1258 foreach ( $args AS $key => $val ) { 1259 $$key = $val; 1260 } 1261 1262 load_plugin_textdomain( 'akismet' ); 1263 1264 $file = AKISMET__PLUGIN_DIR . 'views/'. $name . '.php'; 1265 1266 include( $file ); 1267 } 1268 1269 /** 1270 * Attached to activate_{ plugin_basename( __FILES__ ) } by register_activation_hook() 1271 * @static 1272 */ 1273 public static function plugin_activation() { 1274 if ( version_compare( $GLOBALS['wp_version'], AKISMET__MINIMUM_WP_VERSION, '<' ) ) { 1275 load_plugin_textdomain( 'akismet' ); 1276 1277 $message = '<strong>'.sprintf(esc_html__( 'Akismet %s requires WordPress %s or higher.' , 'akismet'), AKISMET_VERSION, AKISMET__MINIMUM_WP_VERSION ).'</strong> '.sprintf(__('Please <a href="%1$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/'); 1278 1279 Akismet::bail_on_activation( $message ); 1280 } 1281 } 1282 1283 /** 1284 * Removes all connection options 1285 * @static 1286 */ 1287 public static function plugin_deactivation( ) { 1288 self::deactivate_key( self::get_api_key() ); 1289 1290 // Remove any scheduled cron jobs. 1291 $akismet_cron_events = array( 1292 'akismet_schedule_cron_recheck', 1293 'akismet_scheduled_delete', 1294 ); 1295 1296 foreach ( $akismet_cron_events as $akismet_cron_event ) { 1297 $timestamp = wp_next_scheduled( $akismet_cron_event ); 1298 1299 if ( $timestamp ) { 1300 wp_unschedule_event( $timestamp, $akismet_cron_event ); 1301 } 1302 } 1303 } 1304 1305 /** 1306 * Essentially a copy of WP's build_query but one that doesn't expect pre-urlencoded values. 1307 * 1308 * @param array $args An array of key => value pairs 1309 * @return string A string ready for use as a URL query string. 1310 */ 1311 public static function build_query( $args ) { 1312 return _http_build_query( $args, '', '&' ); 1313 } 1314 1315 /** 1316 * Log debugging info to the error log. 1317 * 1318 * Enabled when WP_DEBUG_LOG is enabled (and WP_DEBUG, since according to 1319 * core, "WP_DEBUG_DISPLAY and WP_DEBUG_LOG perform no function unless 1320 * WP_DEBUG is true), but can be disabled via the akismet_debug_log filter. 1321 * 1322 * @param mixed $akismet_debug The data to log. 1323 */ 1324 public static function log( $akismet_debug ) { 1325 if ( apply_filters( 'akismet_debug_log', defined( 'WP_DEBUG' ) && WP_DEBUG && defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG && defined( 'AKISMET_DEBUG' ) && AKISMET_DEBUG ) ) { 1326 error_log( print_r( compact( 'akismet_debug' ), true ) ); 1327 } 1328 } 1329 1330 public static function pre_check_pingback( $method ) { 1331 if ( $method !== 'pingback.ping' ) 1332 return; 1333 1334 global $wp_xmlrpc_server; 1335 1336 if ( !is_object( $wp_xmlrpc_server ) ) 1337 return false; 1338 1339 // Lame: tightly coupled with the IXR class. 1340 $args = $wp_xmlrpc_server->message->params; 1341 1342 if ( !empty( $args[1] ) ) { 1343 $post_id = url_to_postid( $args[1] ); 1344 1345 // If pingbacks aren't open on this post, we'll still check whether this request is part of a potential DDOS, 1346 // but indicate to the server that pingbacks are indeed closed so we don't include this request in the user's stats, 1347 // since the user has already done their part by disabling pingbacks. 1348 $pingbacks_closed = false; 1349 1350 $post = get_post( $post_id ); 1351 1352 if ( ! $post || ! pings_open( $post ) ) { 1353 $pingbacks_closed = true; 1354 } 1355 1356 $comment = array( 1357 'comment_author_url' => $args[0], 1358 'comment_post_ID' => $post_id, 1359 'comment_author' => '', 1360 'comment_author_email' => '', 1361 'comment_content' => '', 1362 'comment_type' => 'pingback', 1363 'akismet_pre_check' => '1', 1364 'comment_pingback_target' => $args[1], 1365 'pingbacks_closed' => $pingbacks_closed ? '1' : '0', 1366 ); 1367 1368 $comment = Akismet::auto_check_comment( $comment ); 1369 1370 if ( isset( $comment['akismet_result'] ) && 'true' == $comment['akismet_result'] ) { 1371 // Lame: tightly coupled with the IXR classes. Unfortunately the action provides no context and no way to return anything. 1372 $wp_xmlrpc_server->error( new IXR_Error( 0, 'Invalid discovery target' ) ); 1373 } 1374 } 1375 } 1376 1377 /** 1378 * Ensure that we are loading expected scalar values from akismet_as_submitted commentmeta. 1379 * 1380 * @param mixed $meta_value 1381 * @return mixed 1382 */ 1383 private static function sanitize_comment_as_submitted( $meta_value ) { 1384 if ( empty( $meta_value ) ) { 1385 return $meta_value; 1386 } 1387 1388 $meta_value = (array) $meta_value; 1389 1390 foreach ( $meta_value as $key => $value ) { 1391 if ( ! isset( self::$comment_as_submitted_allowed_keys[$key] ) || ! is_scalar( $value ) ) { 1392 unset( $meta_value[$key] ); 1393 } 1394 } 1395 1396 return $meta_value; 1397 } 1398 1399 public static function predefined_api_key() { 1400 if ( defined( 'WPCOM_API_KEY' ) ) { 1401 return true; 1402 } 1403 1404 return apply_filters( 'akismet_predefined_api_key', false ); 1405 } 1406 1407 /** 1408 * Controls the display of a privacy related notice underneath the comment form using the `akismet_comment_form_privacy_notice` option and filter respectively. 1409 * Default is top not display the notice, leaving the choice to site admins, or integrators. 1410 */ 1411 public static function display_comment_form_privacy_notice() { 1412 if ( 'display' !== apply_filters( 'akismet_comment_form_privacy_notice', get_option( 'akismet_comment_form_privacy_notice', 'hide' ) ) ) { 1413 return; 1414 } 1415 echo apply_filters( 1416 'akismet_comment_form_privacy_notice_markup', 1417 '<p class="akismet_comment_form_privacy_notice">' . sprintf( 1418 __( 'This site uses Akismet to reduce spam. <a href="%s" target="_blank" rel="nofollow noopener">Learn how your comment data is processed</a>.', 'akismet' ), 1419 'https://akismet.com/privacy/' 1420 ) . '</p>' 1421 ); 1422 } 1423 }
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| Generated: Wed Jul 17 01:00:03 2019 | Cross-referenced by PHPXref 0.7.1 |