001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/security/owsrequestvalidator/wms/GetMapResponseValidator.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    package org.deegree.security.owsrequestvalidator.wms;
037    
038    import org.deegree.framework.util.MimeTypeMapper;
039    import org.deegree.ogcwebservices.InvalidParameterValueException;
040    import org.deegree.ogcwebservices.OGCWebServiceRequest;
041    import org.deegree.security.drm.model.User;
042    import org.deegree.security.owsproxy.Request;
043    import org.deegree.security.owsrequestvalidator.Policy;
044    import org.deegree.security.owsrequestvalidator.ResponseValidator;
045    
046    /**
047     *
048     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth </a>
049     * @author last edited by: $Author: mschneider $
050     *
051     * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
052     */
053    class GetMapResponseValidator extends ResponseValidator {
054    
055        /**
056         * @param policy
057         */
058        public GetMapResponseValidator( Policy policy ) {
059            super( policy );
060        }
061    
062        /**
063         * validates the passed object as a response to a OWS request. The validity of the response may
064         * is assigned to specific user rights. If the passed user is <>null this will be evaluated.
065         * <br>
066         * the reponse may contain three valid kinds of objects:
067         * <ul>
068         * <li>a serialized image
069         * <li>a xml encoded exception
070         * <li>a svg-encoded vector image
071         * </ul>
072         * Each of these types can be identified by the mime-type of the response that is also passed to
073         * the method. <br>
074         * If something basic went wrong it is possible that not further specified kind of object is
075         * passed as response. In this case the method will throw an
076         * <tt>InvalidParameterValueException</tt> to avoid sending bad responses to the client.
077         *
078         * @param service
079         *            service which produced the response (WMS, WFS ...)
080         * @param response
081         * @param mime
082         *            mime-type of the response
083         * @param user
084         * @return a byte array containing the response or the given response if isAny is given.
085         * @throws InvalidParameterValueException
086         * @see GetMapRequestValidator#validateRequest(OGCWebServiceRequest, User)
087         */
088        @Override
089        public byte[] validateResponse( String service, byte[] response, String mime, User user )
090                                throws InvalidParameterValueException {
091    
092            Request req = policy.getRequest( service, "GetMap" );
093            // request is valid because no restrictions are made
094            if ( req.isAny() || req.getPostConditions().isAny() ) {
095                return response;
096            }
097    
098            //Condition postCondition = req.getPostConditions();
099    
100            if ( MimeTypeMapper.isKnownImageType( mime ) ) {
101                response = validateImage( response, mime, user );
102            } else if ( MimeTypeMapper.isKnownOGCType( mime ) ) {
103                // if the mime-type isn't an image type but a known
104                // OGC mime-type it must be an XML document.
105                // probably it is an exception but it also could be
106                // a GML document
107                response = validateXML( response, mime, user );
108            } else if ( mime.equals( "text/xml" ) ) {
109                // if the mime-type isn't an image type but 'text/xml'
110                // it could be an exception
111                response = validateXML( response, mime, user );
112            } else {
113                throw new InvalidParameterValueException( UNKNOWNMIMETYPE + mime );
114            }
115    
116            return response;
117        }
118    
119        /**
120         * Does nothing should validate the passed object/image to be valid against the policy
121         *
122         * @param image
123         * @param mime
124         * @param user
125         * @return the image parameter.
126         */
127        private byte[] validateImage( byte[] image, String mime, User user ) {
128            // TODO
129            // define useful post-validation for images
130            // at the moment everything is valid
131    
132            return image;
133        }
134    
135        /**
136         * Does nothing but should validate the passed object/xml to be valid against the policy
137         *
138         * @param xml
139         * @param mime
140         * @param user
141         * @return the xml parameter.
142         */
143        private byte[] validateXML( byte[] xml, String mime, User user ) {
144            // TODO
145            // define useful post-validation for xml-documents
146            // at the moment everything is valid
147            return xml;
148        }
149    }