content: /*
   * Copyright 1999-2024 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
   *
   *      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 com.alibaba.csp.sentinel.adapter.spring.webmvc_v6x.callback;
  
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  import jakarta.servlet.http.HttpServletRequest;
  import jakarta.servlet.http.HttpServletResponse;
  
  import java.io.PrintWriter;
  
  /**
   * Default handler for the blocked request.
   *
   * @since 1.8.8
   */
  public class DefaultBlockExceptionHandler implements BlockExceptionHandler {
  
      @Override
      public void handle(HttpServletRequest request, HttpServletResponse response, String resourceName, BlockException ex)
              throws Exception {
          // Return 429 (Too Many Requests) by default.
          response.setStatus(429);
  
          PrintWriter out = response.getWriter();
          out.print("Blocked by Sentinel (flow limiting)");
          out.flush();
          out.close();
      }
  }
  