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.console.controller;
  
  import com.alibaba.nacos.common.model.RestResult;
  import com.alibaba.nacos.common.model.RestResultUtils;
  import com.alibaba.nacos.console.handler.impl.inner.EnabledInnerHandler;
  import com.alibaba.nacos.console.paramcheck.ConsoleDefaultHttpParamExtractor;
  import com.alibaba.nacos.core.controller.compatibility.Compatibility;
  import com.alibaba.nacos.core.paramcheck.ExtractorManager;
  import com.alibaba.nacos.core.service.NacosServerStateService;
  import com.alibaba.nacos.plugin.auth.constant.ApiType;
  import com.alibaba.nacos.sys.env.EnvUtil;
  import com.alibaba.nacos.sys.utils.DiskUtils;
  import org.springframework.http.ResponseEntity;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.RestController;
  
  import java.io.File;
  import java.util.Map;
  
  import static com.alibaba.nacos.common.utils.StringUtils.FOLDER_SEPARATOR;
  import static com.alibaba.nacos.common.utils.StringUtils.TOP_PATH;
  import static com.alibaba.nacos.common.utils.StringUtils.WINDOWS_FOLDER_SEPARATOR;
  
  /**
   * Server state controller.
   *
   * @author xingxuechao on:2019/2/27 11:17 AM
   */
  @RestController
  @RequestMapping("/v1/console/server")
  @ExtractorManager.Extractor(httpExtractor = ConsoleDefaultHttpParamExtractor.class)
  @EnabledInnerHandler
  public class ServerStateController {
      
      private static final String ANNOUNCEMENT_FILE = "announcement.conf";
      
      private static final String GUIDE_FILE = "console-guide.conf";
      
      private final NacosServerStateService stateService;
      
      public ServerStateController(NacosServerStateService stateService) {
          this.stateService = stateService;
      }
      
      /**
       * Get server state of current server.
       *
       * @return state json.
       */
      @GetMapping("/state")
      @Compatibility(apiType = ApiType.CONSOLE_API, alternatives = "GET ${contextPath:nacos}/v3/console/server/state")
      public ResponseEntity<Map<String, String>> serverState() {
          return ResponseEntity.ok(stateService.getServerState());
      }
      
      @GetMapping("/announcement")
      @Compatibility(apiType = ApiType.CONSOLE_API, alternatives = "GET ${contextPath:nacos}/v3/console/server/announcement")
      public RestResult<String> getAnnouncement(
              @RequestParam(required = false, name = "language", defaultValue = "zh-CN") String language) {
          String file = ANNOUNCEMENT_FILE.substring(0, ANNOUNCEMENT_FILE.length() - 5) + "_" + language + ".conf";
          if (file.contains(TOP_PATH) || file.contains(FOLDER_SEPARATOR) || file.contains(WINDOWS_FOLDER_SEPARATOR)) {
              throw new IllegalArgumentException("Invalid filename");
          }
          File announcementFile = new File(EnvUtil.getConfPath(), file);
          String announcement = null;
          if (announcementFile.exists() && announcementFile.isFile()) {
              announcement = DiskUtils.readFile(announcementFile);
          }
          return RestResultUtils.success(announcement);
      }
      
      @GetMapping("/guide")
      @Compatibility(apiType = ApiType.CONSOLE_API, alternatives = "GET ${contextPath:nacos}/v3/console/server/guide")
      public RestResult<String> getConsoleUiGuide() {
          File guideFile = new File(EnvUtil.getConfPath(), GUIDE_FILE);
          String guideInformation = null;
          if (guideFile.exists() && guideFile.isFile()) {
              guideInformation = DiskUtils.readFile(guideFile);
          }
          return RestResultUtils.success(guideInformation);
      }
  }
  