    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_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    }