content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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
   *
   *    https://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 org.apache.bigtop.manager.server.config;
  
  import org.springframework.boot.web.servlet.error.ErrorController;
  import org.springframework.http.HttpStatus;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.servlet.ModelAndView;
  
  import jakarta.servlet.RequestDispatcher;
  import jakarta.servlet.http.HttpServletRequest;
  
  @Controller
  public class FrontendRedirector implements ErrorController {
  
      @RequestMapping("/error")
      public ModelAndView handleError(HttpServletRequest request) {
          Object status = request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE);
          ModelAndView modelAndView = new ModelAndView();
  
          if (status != null) {
              int statusCode = Integer.parseInt(status.toString());
  
              if (statusCode == HttpStatus.NOT_FOUND.value()) {
                  modelAndView.setStatus(HttpStatus.OK);
                  modelAndView.setViewName("forward:/ui/index.html");
                  return modelAndView;
              }
  
              modelAndView.setStatus(HttpStatus.valueOf(statusCode));
          }
  
          return modelAndView;
      }
  }
  