    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/portal/owswatch/validator/CSWGetRecordsValidator.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.portal.owswatch.validator;
    038
    039    import java.io.IOException;
    040    import java.io.InputStream;
    041    import java.io.Serializable;
    042    import java.net.URI;
    043
    044    import org.apache.commons.httpclient.HttpMethodBase;
    045    import org.deegree.framework.util.StringTools;
    046    import org.deegree.framework.xml.NamespaceContext;
    047    import org.deegree.framework.xml.XMLParsingException;
    048    import org.deegree.framework.xml.XMLTools;
    049    import org.deegree.ogcbase.CommonNamespaces;
    050    import org.w3c.dom.Document;
    051
    052    import org.deegree.portal.owswatch.Status;
    053    import org.deegree.portal.owswatch.ValidatorResponse;
    054
    055    /**
    056     * A specific implementation of AbstractValidator
    057     *
    058     * @author <a href="mailto:elmasry@lat-lon.de">Moataz Elmasry</a>
    059     * @author last edited by: $Author: jmays $
    060     *
    061     * @version $Revision: 20271 $, $Date: 2009-10-21 13:07:15 +0200 (Mi, 21. Okt 2009) $
    062     */
    063    public class CSWGetRecordsValidator extends AbstractValidator implements Serializable {
    064
    065        /**
    066         *
    067         */
    068        private static final long serialVersionUID = 653569280799419300L;
    069
    070        /*
    071         * (non-Javadoc)
    072         *
    073         * @see org.deegree.portal.owswatch.validator.AbstractValidator#validateAnswer(org.apache.commons.httpclient.HttpMethodBase,
    074         *      int)
    075         */
    076        @Override
    077        public ValidatorResponse validateAnswer( HttpMethodBase method, int statusCode ) {
    078
    079            String contentType = method.getResponseHeader( "Content-Type" ).getValue();
    080            String lastMessage = null;
    081            Status status = null;
    082
    083            if ( !contentType.contains( "xml" ) ) {
    084                status = Status.RESULT_STATE_UNEXPECTED_CONTENT;
    085                lastMessage = StringTools.concat( 100, "Error: Response Content is ", contentType, " not xml" );
    086                return new ValidatorResponse( lastMessage, status );
    087            }
    088
    089            String xml = null;
    090            try {
    091                InputStream stream = method.getResponseBodyAsStream();
    092                stream.reset();
    093                xml = parseStream( stream );
    094            } catch ( IOException e ) {
    095                status = Status.RESULT_STATE_BAD_RESPONSE;
    096                lastMessage = status.getStatusMessage();
    097                return new ValidatorResponse( lastMessage, status );
    098            }
    099
    100            if ( xml.length() == 0 ) {
    101                status = Status.RESULT_STATE_BAD_RESPONSE;
    102                lastMessage = "Error: XML Response is empty";
    103                return new ValidatorResponse( lastMessage, status );
    104            }
    105
    106            if ( xml.contains( "ExceptionReport" ) ) {
    107                validateXmlServiceException( method );
    108                return new ValidatorResponse( lastMessage, status );
    109            }
    110            // If its an xml, and there's no service exception, then don't really parse the xml,
    111            // we assume that its well formed, since there might be huge xmls, which would take time to be parsed
    112            status = Status.RESULT_STATE_AVAILABLE;
    113            lastMessage = status.getStatusMessage();
    114            return new ValidatorResponse( lastMessage, status );
    115        }
    116
    117        /*
    118         * (non-Javadoc)
    119         *
    120         * @see org.deegree.portal.owswatch.validator.AbstractValidator#validateXmlServiceException(org.apache.commons.httpclient.HttpMethodBase)
    121         */
    122        @Override
    123        protected ValidatorResponse validateXmlServiceException( HttpMethodBase method ) {
    124
    125            Document doc = null;
    126            String lastMessage = null;
    127            Status status = null;
    128
    129            try {
    130                InputStream stream = method.getResponseBodyAsStream();
    131                stream.reset();
    132                doc = instantiateParser().parse( stream );
    133            } catch ( Exception e ) {
    134                status = Status.RESULT_STATE_INVALID_XML;
    135                lastMessage = "Error: MalFormed XML Response";
    136                return new ValidatorResponse( lastMessage, status );
    137            }
    138            try {
    139                NamespaceContext cnxt = CommonNamespaces.getNamespaceContext();
    140                URI owsns = CommonNamespaces.OWSNS;
    141                String prefix = doc.lookupPrefix( owsns.toASCIIString() );
    142                StringBuilder builder = new StringBuilder( 100 );
    143                builder.append( "./" );
    144                if ( prefix != null && prefix.length() > 0 ) {
    145                    builder.append( prefix ).append( ":" );
    146                    cnxt.addNamespace( prefix, owsns );
    147                }
    148
    149                builder.append( "Exception" );
    150                status = Status.RESULT_STATE_SERVICE_UNAVAILABLE;
    151                lastMessage = XMLTools.getNodeAsString( doc.getDocumentElement(), builder.toString(), cnxt,
    152                                                        "Service Unavailable. Unknown error" );
    153                return new ValidatorResponse( lastMessage, status );
    154            } catch ( XMLParsingException e ) {
    155                lastMessage = "Service Unavailable";
    156                status = Status.RESULT_STATE_SERVICE_UNAVAILABLE;
    157                return new ValidatorResponse( lastMessage, status );
    158            }
    159        }
    160    }