001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/enterprise/servlet/TolerantOGCRequestFilter.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036
037 package org.deegree.enterprise.servlet;
038
039 import java.io.IOException;
040 import java.util.HashMap;
041 import java.util.Map;
042
043 import javax.servlet.Filter;
044 import javax.servlet.FilterChain;
045 import javax.servlet.FilterConfig;
046 import javax.servlet.ServletException;
047 import javax.servlet.ServletRequest;
048 import javax.servlet.ServletResponse;
049 import javax.servlet.http.HttpServletRequest;
050 import javax.servlet.http.HttpServletRequestWrapper;
051
052 /**
053 * <code>TolerantOGCRequestFilter</code> currently implements the following relaxations:
054 *
055 * <ul>
056 * <li>format is not required for WMS GetFeatureInfo requests</li>
057 * <li>version can be 1.0 for WFS requests (and will be interpreted as 1.0.0)</li>
058 * </ul>
059 *
060 * @author <a href="mailto:schmitz@lat-lon.de">Andreas Schmitz</a>
061 * @author last edited by: $Author: mschneider $
062 *
063 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
064 */
065 public class TolerantOGCRequestFilter implements Filter {
066
067 public void destroy() {
068 // nothing to destroy
069 }
070
071 public void doFilter( ServletRequest request, ServletResponse response, FilterChain chain )
072 throws IOException, ServletException {
073 Map<?, ?> map = request.getParameterMap();
074 final Map<String, String[]> newMap = new HashMap<String, String[]>();
075
076 for ( Object key : map.keySet() ) {
077 newMap.put( key.toString().toUpperCase(), (String[]) map.get( key ) );
078 }
079
080 if ( newMap.get( "REQUEST" ) != null && newMap.get( "REQUEST" )[0].equals( "GetFeatureInfo" ) ) {
081 if ( !newMap.containsKey( "FORMAT" ) ) {
082 newMap.put( "format", new String[] { "image/png" } );
083 }
084 }
085
086 if ( newMap.get( "SERVICE" ) != null && newMap.get( "SERVICE" )[0].equals( "WFS" ) ) {
087 if ( newMap.get( "VERSION" )[0].equals( "1.0" ) ) {
088 newMap.put( "VERSION", new String[] { "1.0.0" } );
089 }
090 }
091
092 chain.doFilter( new HttpServletRequestWrapper( (HttpServletRequest) request ) {
093 @Override
094 public Map<?, ?> getParameterMap() {
095 return newMap;
096 }
097 }, response );
098 }
099
100 public void init( FilterConfig conf )
101 throws ServletException {
102 // no configuration is required
103 }
104
105 }