    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/security/owsrequestvalidator/wms/GetFeatureInfoResponseValidator.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 GetFeatureInfoResponseValidator extends ResponseValidator {
    054
    055        /**
    056         * @param policy
    057         */
    058        public GetFeatureInfoResponseValidator( 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 xml encoded exception
    069         * <li>a GML document
    070         * <li>a XML document
    071         * <li>any other kind of document that is valid against the formats defined for GetFeatureInfo
    072         * in the capabilities
    073         * </ul>
    074         * Each of these types can be identified by the mime-type of the response that is also passed to
    075         * the method. <br>
    076         * If something basic went wrong it is possible that not further specified kind of object is
    077         * passed as response. In this case the method will throw an
    078         * <tt>InvalidParameterValueException</tt> to avoid sending bad responses to the client.
    079         *
    080         * @param service
    081         *            service which produced the response (WMS, WFS ...)
    082         * @param response
    083         * @param mime
    084         *            mime-type of the response
    085         * @param user
    086         * @return the validated response or the unaltered response.
    087         * @throws InvalidParameterValueException
    088         * @see GetMapRequestValidator#validateRequest(OGCWebServiceRequest, User)
    089         */
    090        @Override
    091        public byte[] validateResponse( String service, byte[] response, String mime, User user )
    092                                throws InvalidParameterValueException {
    093
    094            Request req = policy.getRequest( service, "GetFeatureInfo" );
    095            // request is valid because no restrictions are made
    096            if ( req.isAny() || req.getPostConditions().isAny() ) {
    097                return response;
    098            }
    099
    100            // Condition condition = req.getPostConditions();
    101
    102            if ( MimeTypeMapper.isKnownImageType( mime ) ) {
    103                response = validateImage( response, mime, user );
    104            } else if ( MimeTypeMapper.isKnownOGCType( mime ) ) {
    105                // if the mime-type isn't an image type but a known
    106                // OGC mime-type it must be an XML document.
    107                // probably it is an exception but it also could be
    108                // a GML document
    109                response = validateXML( response, mime, user );
    110            } else if ( mime.equals( "text/xml" ) ) {
    111                // if the mime-type isn't an image type but 'text/xml'
    112                // it could be an exception
    113                response = validateXML( response, mime, user );
    114            } else if ( mime.equals( "text/html" ) ) {
    115                response = validateHTML( response, mime, user );
    116            } else {
    117                throw new InvalidParameterValueException( UNKNOWNMIMETYPE + mime );
    118            }
    119
    120            return response;
    121        }
    122
    123        /**
    124         * validates the passed image to be valid against the policy
    125         *
    126         * @param image
    127         * @param mime
    128         * @param user
    129         * @return the image parameter.
    130         */
    131        private byte[] validateImage( byte[] image, String mime, User user ) {
    132            // TODO
    133            // define useful post-validation for images
    134            // at the moment everything is valid
    135            return image;
    136        }
    137
    138        /**
    139         * validates the passed xml to be valid against the policy
    140         *
    141         * @param xml
    142         * @param mime
    143         * @param user
    144         * @return the xml parameter.
    145         */
    146        private byte[] validateXML( byte[] xml, String mime, User user ){
    147            // TODO
    148            // define useful post-validation for xml-documents
    149            // at the moment everything is valid
    150            return xml;
    151        }
    152
    153        /**
    154         * validates the passed html to be valid against the policy
    155         *
    156         * @param html
    157         * @param mime
    158         * @param user
    159         * @return the html parameter.
    160         */
    161        private byte[] validateHTML( byte[] html, String mime, User user ) {
    162            // TODO
    163            // define useful post-validation for xml-documents
    164            // at the moment everything is valid
    165            return html;
    166        }
    167    }