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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.tobago.internal.webapp;
21  
22  import org.slf4j.Logger;
23  import org.slf4j.LoggerFactory;
24  
25  import javax.servlet.Filter;
26  import javax.servlet.FilterChain;
27  import javax.servlet.FilterConfig;
28  import javax.servlet.ServletException;
29  import javax.servlet.ServletRequest;
30  import javax.servlet.ServletResponse;
31  import javax.servlet.http.HttpServletResponse;
32  import java.io.IOException;
33  
34  public class DebugContentTypeFilter implements Filter {
35    private static final Logger LOG = LoggerFactory.getLogger(DebugContentTypeFilter.class);
36  
37    public void init(final FilterConfig filterConfig) throws ServletException {
38      if (LOG.isInfoEnabled()) {
39        LOG.info("init " + getClass().getName());
40      }
41    }
42  
43    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
44        throws IOException, ServletException {
45      if (LOG.isDebugEnabled()) {
46        LOG.debug("do Filter " + getClass().getName());
47      }
48      if (response instanceof HttpServletResponse) {
49        if (LOG.isDebugEnabled()) {
50          LOG.debug("wrapping response " + getClass().getName());
51        }
52        chain.doFilter(request, new DebugContentTypeResponse((HttpServletResponse) response));
53      } else {
54        chain.doFilter(request, response);
55      }
56    }
57  
58    public void destroy() {
59  
60    }
61  }