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
   *
   *      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 org.apache.activemq.web;
  
  import java.io.IOException;
  import java.util.UUID;
  
  import jakarta.servlet.Filter;
  import jakarta.servlet.FilterChain;
  import jakarta.servlet.FilterConfig;
  import jakarta.servlet.ServletException;
  import jakarta.servlet.ServletRequest;
  import jakarta.servlet.ServletResponse;
  import jakarta.servlet.http.HttpServletRequest;
  import jakarta.servlet.http.HttpSession;
  
  /* ------------------------------------------------------------ */
  /**
   * SessionFilter. Simple filter to ensure that all clients have a session.
   * Prevents problems with AJAX requests.
   */
  public class SessionFilter implements Filter {
  
      public void init(FilterConfig filterConfig) throws ServletException {
      }
  
      public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
      	// set secret to prevent CSRF attacks
          ((HttpServletRequest)request).getSession(true).setAttribute("secret", UUID.randomUUID().toString());;
          chain.doFilter(request, response);
      }
  
      public void destroy() {
      }
  
  }
  