001    /*
002     * Copyright (c) 2007 Mozilla Foundation
003     *
004     * Permission is hereby granted, free of charge, to any person obtaining a 
005     * copy of this software and associated documentation files (the "Software"), 
006     * to deal in the Software without restriction, including without limitation 
007     * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
008     * and/or sell copies of the Software, and to permit persons to whom the 
009     * Software is furnished to do so, subject to the following conditions:
010     *
011     * The above copyright notice and this permission notice shall be included in 
012     * all copies or substantial portions of the Software.
013     *
014     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
015     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
016     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
017     * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
018     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
019     * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
020     * DEALINGS IN THE SOFTWARE.
021     */
022    
023    package nu.validator.servletfilter;
024    
025    import java.io.IOException;
026    
027    import javax.servlet.Filter;
028    import javax.servlet.FilterChain;
029    import javax.servlet.FilterConfig;
030    import javax.servlet.ServletException;
031    import javax.servlet.ServletInputStream;
032    import javax.servlet.ServletRequest;
033    import javax.servlet.ServletResponse;
034    import javax.servlet.http.HttpServletRequest;
035    
036    public class InboundGzipFilter implements Filter {
037    
038        public void destroy() {
039        }
040    
041        public void doFilter(ServletRequest req, ServletResponse res,
042                FilterChain chain) throws IOException, ServletException {
043            HttpServletRequest request = (HttpServletRequest) req;
044            String method = request.getMethod();
045            if ("POST".equals(method) || "PUT".equals(method)) {
046                String ce = request.getHeader("Content-Encoding");
047                if (ce != null && "gzip".equalsIgnoreCase(ce.trim())) {
048                    chain.doFilter(wrap(request), res);                
049                } else {
050                    // do nothing
051                    chain.doFilter(req, res);
052                }
053            } else {
054                // do nothing
055                chain.doFilter(req, res);
056            }
057        }
058    
059        private ServletRequest wrap(HttpServletRequest request) {
060            // TODO Auto-generated method stub
061            return null;
062        }
063    
064        public void init(FilterConfig config) throws ServletException {
065        }
066    
067        private class GzipServletInputStream extends ServletInputStream {
068    
069            @Override
070            public int read() throws IOException {
071                // TODO Auto-generated method stub
072                return 0;
073            }
074            
075        }
076    }