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