content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.nacos.config.server.service;
  
  import com.alibaba.nacos.config.server.model.ACLInfo;
  import com.alibaba.nacos.config.server.utils.JSONUtils;
  import org.apache.commons.lang3.StringUtils;
  import org.springframework.stereotype.Service;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.atomic.AtomicReference;
  
  import static com.alibaba.nacos.config.server.utils.LogUtil.defaultLog;
  
  /**
   * Client ip whitelist
   *
   * @author Nacos
   */
  @Service
  public class ClientIpWhiteList {
  
      /**
       * 判断指定的ip在白名单中
       */
      static public boolean isLegalClient(String clientIp) {
          if (StringUtils.isBlank(clientIp)) {
              throw new IllegalArgumentException();
          }
          clientIp = clientIp.trim();
          if (CLIENT_IP_WHITELIST.get().contains(clientIp)) {
              return true;
          }
          return false;
      }
  
      /**
       * whether start client ip whitelist
       *
       * @return true: enable ; false disable
       */
      static public boolean isEnableWhitelist() {
          return isOpen;
      }
  
      /**
       * 传入内容，重新加载客户端ip白名单
       */
      static public void load(String content) {
          if (StringUtils.isBlank(content)) {
              defaultLog.warn("clientIpWhiteList is blank.close whitelist.");
              isOpen = false;
              CLIENT_IP_WHITELIST.get().clear();
              return;
          }
          defaultLog.warn("[clientIpWhiteList] {}", content);
          try {
              ACLInfo acl = (ACLInfo)JSONUtils.deserializeObject(content, ACLInfo.class);
              isOpen = acl.getIsOpen();
              CLIENT_IP_WHITELIST.set(acl.getIps());
          } catch (Exception ioe) {
              defaultLog.error(
                  "failed to load clientIpWhiteList, " + ioe.toString(), ioe);
          }
      }
  
      // =======================
  
      static public final String CLIENT_IP_WHITELIST_METADATA = "com.alibaba.nacos.metadata.clientIpWhitelist";
  
      static final AtomicReference<List<String>> CLIENT_IP_WHITELIST = new AtomicReference<List<String>>(
          new ArrayList<String>());
      static Boolean isOpen = false;
  }
  