content: /*
   * Copyright 1999-2020 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.naming.web;
  
  import com.alibaba.nacos.api.common.Constants;
  import com.alibaba.nacos.api.naming.CommonParams;
  import com.alibaba.nacos.api.naming.utils.NamingUtils;
  import com.alibaba.nacos.common.utils.ExceptionUtil;
  import com.alibaba.nacos.common.utils.StringUtils;
  import com.alibaba.nacos.core.utils.OverrideParameterRequestWrapper;
  
  import jakarta.servlet.Filter;
  import jakarta.servlet.FilterChain;
  import jakarta.servlet.ServletException;
  import jakarta.servlet.ServletRequest;
  import jakarta.servlet.ServletResponse;
  import jakarta.servlet.http.HttpServletRequest;
  import jakarta.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  /**
   * Service name filter. This class is created for adapting 1.x. client and old openAPI.
   * <p>
   * Because the old version will auto combined group and serviceName in old {@link DistroFilter}. So client and openAPI
   * can ignore group name.
   * </p>
   *
   * @author xiweng.yy
   */
  public class ServiceNameFilter implements Filter {
      
      @Override
      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
              throws IOException, ServletException {
          HttpServletRequest request = (HttpServletRequest) servletRequest;
          HttpServletResponse resp = (HttpServletResponse) servletResponse;
          try {
              String serviceName = request.getParameter(CommonParams.SERVICE_NAME);
              
              if (StringUtils.isNotBlank(serviceName)) {
                  serviceName = serviceName.trim();
              }
              String groupName = request.getParameter(CommonParams.GROUP_NAME);
              if (StringUtils.isBlank(groupName)) {
                  groupName = Constants.DEFAULT_GROUP;
              }
              
              // use groupName@@serviceName as new service name:
              String groupedServiceName = serviceName;
              if (StringUtils.isNotBlank(serviceName) && !serviceName.contains(Constants.SERVICE_INFO_SPLITER)) {
                  groupedServiceName = groupName + Constants.SERVICE_INFO_SPLITER + serviceName;
              }
              if (StringUtils.isNotBlank(groupedServiceName)) {
                  try {
                      NamingUtils.checkServiceNameFormat(groupedServiceName);
                  } catch (IllegalArgumentException e) {
                      resp.sendError(HttpServletResponse.SC_BAD_REQUEST,
                              "Service name filter error," + ExceptionUtil.getAllExceptionMsg(e));
                  }
              }
              OverrideParameterRequestWrapper requestWrapper = OverrideParameterRequestWrapper.buildRequest(request);
              requestWrapper.addParameter(CommonParams.SERVICE_NAME, groupedServiceName);
              filterChain.doFilter(requestWrapper, servletResponse);
          } catch (Exception e) {
              resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                      "Service name filter error," + ExceptionUtil.getAllExceptionMsg(e));
          }
      }
  }
  