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0, 'filesDeleted' => 0, 'totalData' => 0, 'totalErrors' => 0, 'error' => '', ); $cacheDir = WP_CONTENT_DIR . '/wfcache/'; if (!file_exists($cacheDir)) { return self::$cacheStats; } $cacheClearLock = WP_CONTENT_DIR . '/wfcache/clear.lock'; if(! is_file($cacheClearLock)){ if(! touch($cacheClearLock)){ self::$cacheStats['error'] = "Could not create a lock file $cacheClearLock to clear the cache."; self::$cacheStats['totalErrors']++; return self::$cacheStats; } } $fp = fopen($cacheClearLock, 'w'); if(! $fp){ self::$cacheStats['error'] = "Could not open the lock file $cacheClearLock to clear the cache. Please make sure the directory is writable by your web server."; self::$cacheStats['totalErrors']++; return self::$cacheStats; } if(flock($fp, LOCK_EX | LOCK_NB)){ //non blocking exclusive flock attempt. If we get a lock then it continues and returns true. If we don't lock, then return false, don't block and don't clear the cache. // This logic means that if a cache clear is currently in progress we don't try to clear the cache. // This prevents web server children from being queued up waiting to be able to also clear the cache. self::$lastRecursiveDeleteError = false; self::recursiveDelete(WP_CONTENT_DIR . '/wfcache/'); if(self::$lastRecursiveDeleteError){ self::$cacheStats['error'] = self::$lastRecursiveDeleteError; self::$cacheStats['totalErrors']++; } flock($fp, LOCK_UN); @unlink($cacheClearLock); @rmdir($cacheDir); } fclose($fp); return self::$cacheStats; } private static function recursiveDelete($dir) { $files = array_diff(scandir($dir), array('.','..')); foreach ($files as $file) { if(is_dir($dir . '/' . $file)){ if(! self::recursiveDelete($dir . '/' . $file)){ return false; } } else { if($file == 'clear.lock'){ continue; } //Don't delete our lock file $size = filesize($dir . '/' . $file); if($size){ self::$cacheStats['totalData'] += round($size / 1024); } if(strpos($dir, 'wfcache/') === false){ self::$lastRecursiveDeleteError = "Not deleting file in directory $dir because it appears to be in the wrong path."; self::$cacheStats['totalErrors']++; return false; //Safety check that we're in a subdir of the cache } if(@unlink($dir . '/' . $file)){ self::$cacheStats['filesDeleted']++; } else { self::$lastRecursiveDeleteError = "Could not delete file " . $dir . "/" . $file . " : " . wfUtils::getLastError(); self::$cacheStats['totalErrors']++; return false; } } } if($dir != WP_CONTENT_DIR . '/wfcache/'){ if(strpos($dir, 'wfcache/') === false){ self::$lastRecursiveDeleteError = "Not deleting directory $dir because it appears to be in the wrong path."; self::$cacheStats['totalErrors']++; return false; //Safety check that we're in a subdir of the cache } if(@rmdir($dir)){ self::$cacheStats['dirsDeleted']++; } else { self::$lastRecursiveDeleteError = "Could not delete directory $dir : " . wfUtils::getLastError(); self::$cacheStats['totalErrors']++; return false; } return true; } else { return true; } } public static function addHtaccessCode($action){ if($action != 'remove'){ die("Error: addHtaccessCode must be called with 'remove' as param"); } $htaccessPath = self::getHtaccessPath(); if(! $htaccessPath){ return "Wordfence could not find your .htaccess file."; } $fh = @fopen($htaccessPath, 'r+'); if(! $fh){ $err = error_get_last(); return $err['message']; } flock($fh, LOCK_EX); fseek($fh, 0, SEEK_SET); //start of file clearstatcache(); $contents = fread($fh, filesize($htaccessPath)); if(! $contents){ fclose($fh); return "Could not read from $htaccessPath"; } $contents = preg_replace('/#WFCACHECODE.*WFCACHECODE[\r\s\n\t]*/s', '', $contents); ftruncate($fh, 0); fflush($fh); fseek($fh, 0, SEEK_SET); fwrite($fh, $contents); flock($fh, LOCK_UN); fclose($fh); return false; } /** * @param $action * @return bool|string|void */ public static function updateBlockedIPs($action){ //'add' or 'remove' $htaccessPath = self::getHtaccessPath(); if(! $htaccessPath){ return "Wordfence could not find your .htaccess file."; } if($action == 'remove'){ $fh = @fopen($htaccessPath, 'r+'); if(! $fh){ $err = error_get_last(); return $err['message']; } flock($fh, LOCK_EX); fseek($fh, 0, SEEK_SET); //start of file clearstatcache(); $contents = @fread($fh, filesize($htaccessPath)); if(! $contents){ fclose($fh); return "Could not read from $htaccessPath"; } $contents = preg_replace('/#WFIPBLOCKS.*WFIPBLOCKS[\r\s\n\t]*/s', '', $contents); ftruncate($fh, 0); fflush($fh); fseek($fh, 0, SEEK_SET); @fwrite($fh, $contents); flock($fh, LOCK_UN); fclose($fh); return false; } return false; } public static function getHtaccessPath(){ $homePath = wfUtils::getHomePath(); $htaccessFile = $homePath.'.htaccess'; return $htaccessFile; } public static function doNotCache(){ if(! defined('WFDONOTCACHE')){ define('WFDONOTCACHE', true); } } }