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.camel.component.jetty;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.Files;
  
  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 org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * The camel filter wrapper that processes only initially dispatched requests. Re-dispatched requests are ignored.
   */
  public class CamelFilterWrapper implements Filter {
  
      private static final Logger LOG = LoggerFactory.getLogger(CamelFilterWrapper.class);
      private final Filter wrapped;
  
      public CamelFilterWrapper(Filter wrapped) {
          this.wrapped = wrapped;
      }
  
      @Override
      public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
              throws IOException, ServletException {
          if (request.getAttribute(CamelContinuationServlet.EXCHANGE_ATTRIBUTE_NAME) == null) {
              wrapped.doFilter(request, response, chain);
          } else {
              chain.doFilter(request, response);
          }
      }
  
      @Override
      public void destroy() {
          wrapped.destroy();
      }
  
      @Override
      public void init(FilterConfig config) throws ServletException {
          Object o = config.getServletContext().getAttribute("jakarta.servlet.context.tempdir");
          if (o == null) {
              //when run in embedded mode, Jetty 8 will forget to set this property,
              //but the MultiPartFilter requires it (will NPE if not set) so we'll
              //go ahead and set it to the default tmp dir on the system.
              try {
                  File file = Files.createTempFile("camel", "").toFile();
                  boolean result = file.delete();
                  if (!result) {
                      LOG.error("failed to delete {}", file);
                  }
                  config.getServletContext().setAttribute("jakarta.servlet.context.tempdir",
                          file.getParentFile());
              } catch (IOException e) {
                  //ignore
              }
          }
          wrapped.init(config);
      }
  
  }
  