001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/enterprise/servlet/WASSHandler.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044
045 package org.deegree.enterprise.servlet;
046
047 import java.io.BufferedInputStream;
048 import java.io.IOException;
049 import java.io.InputStream;
050 import java.io.OutputStream;
051
052 import javax.servlet.http.HttpServletResponse;
053
054 import org.apache.commons.httpclient.Header;
055 import org.deegree.enterprise.ServiceException;
056 import org.deegree.framework.log.ILogger;
057 import org.deegree.framework.log.LoggerFactory;
058 import org.deegree.framework.util.CharsetUtils;
059 import org.deegree.ogcwebservices.OGCWebServiceException;
060 import org.deegree.ogcwebservices.OGCWebServiceRequest;
061 import org.deegree.ogcwebservices.wass.common.WASServiceFactory;
062 import org.deegree.ogcwebservices.wass.common.XMLFactory;
063 import org.deegree.ogcwebservices.wass.was.WAService;
064 import org.deegree.ogcwebservices.wass.was.capabilities.WASCapabilities;
065 import org.deegree.ogcwebservices.wass.was.capabilities.WASCapabilitiesDocument;
066 import org.deegree.ogcwebservices.wass.was.operation.DescribeUserResponse;
067 import org.deegree.ogcwebservices.wass.wss.WSService;
068 import org.deegree.ogcwebservices.wass.wss.capabilities.WSSCapabilities;
069 import org.deegree.ogcwebservices.wass.wss.capabilities.WSSCapabilitiesDocument;
070 import org.deegree.ogcwebservices.wass.wss.operation.DoServiceResponse;
071
072 /**
073 * This is the servlet handler class for the WASS services, ie, the Web
074 * Authentication Service and the Web Security Service. Attention: since much of
075 * the WAS/WSS behaviour is specified to be the same, much of the code of this
076 * class is shared, see for example the handleResult method.
077 *
078 * @see #handleResult(Object)
079 *
080 * @author <a href="mailto:schmitz@lat-lon.de">Andreas Schmitz</a>
081 * @author last edited by: $Author: apoth $
082 *
083 * @version 2.0, $Revision: 9338 $, $Date: 2007-12-27 13:31:31 +0100 (Do, 27 Dez 2007) $
084 *
085 * @since 2.0
086 */
087
088 public class WASSHandler extends AbstractOWServiceHandler implements ServiceDispatcher {
089
090 private static final ILogger LOG = LoggerFactory.getLogger( WASSHandler.class );
091
092 private HttpServletResponse response = null;
093
094 /**
095 * Method to handle the various output objects.
096 *
097 * @param result
098 * @throws IOException
099 */
100 private void handleResult( Object result )
101 throws IOException {
102 // if result is null, was possibly a CloseSession request, so return
103 // nothing as specified
104 if ( result == null ){
105 response.setContentType( "text/plain; charset=" + CharsetUtils.getSystemCharset() );
106 response.getWriter().println();
107 }
108
109 if ( result instanceof OGCWebServiceException ) {
110 sendException( response, (OGCWebServiceException) result );
111 } else if ( result instanceof Exception ) {
112 sendException( response, (Exception) result );
113 } else if ( result instanceof String ) {
114 // just write the SessionID result from GetSession request
115 response.setContentType( "text/plain; charset=" + CharsetUtils.getSystemCharset() );
116 response.getWriter().print( result );
117 } else if ( result instanceof WASCapabilities ) {
118 sendCapabilities( (WASCapabilities) result );
119 } else if ( result instanceof WSSCapabilities ) {
120 sendCapabilities( (WSSCapabilities) result );
121 } else if ( result instanceof DescribeUserResponse ) {
122 sendDescribeUserResponse( (DescribeUserResponse) result );
123 } else if ( result instanceof DoServiceResponse ) {
124 sendOtherServiceResponse( (DoServiceResponse) result );
125 }
126 }
127
128 /**
129 * Sends the XML document contained within the given parameter
130 *
131 * @param result
132 * @throws IOException
133 */
134 private void sendDescribeUserResponse( DescribeUserResponse result ) throws IOException {
135 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
136 result.write( response.getOutputStream() );
137 }
138
139 /**
140 * Method to send the result of another service.
141 *
142 * @param result
143 * @throws IOException
144 */
145 private void sendOtherServiceResponse( DoServiceResponse result )
146 throws IOException {
147 Header[] headers = result.getHeaders();
148 // footers will be ignored for now
149 // Header[] footers = result.getFooters();
150 InputStream in = result.getResponseBody();
151 for ( Header h : headers ) {
152 // maybe we have to filter some headers here TODO
153 LOG.logDebug( h.toExternalForm() );
154 response.setHeader( h.getName(), h.getValue() );
155 }
156 // BufferedReader bin = new BufferedReader( new InputStreamReader( in ) );
157 // PrintWriter out = response.getWriter();
158 BufferedInputStream bin = new BufferedInputStream( in );
159 OutputStream out = response.getOutputStream();
160 byte[] buf = new byte[4096];
161 int numberRead = 0;
162 while ( (numberRead = bin.read( buf )) != -1 ){
163 out.write( buf, 0, numberRead );
164 }
165 bin.close();
166 out.close();
167 }
168
169 /**
170 * Sends the given capabilities.
171 *
172 * @param capabilities
173 */
174 private void sendCapabilities( WSSCapabilities capabilities ) {
175 try {
176 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
177 WSSCapabilitiesDocument document = XMLFactory.export( capabilities );
178 document.write( response.getOutputStream() );
179 } catch ( IOException e ) {
180 LOG.logError( "Error sending GetCapabilities response.", e );
181 }
182 }
183
184 /**
185 * Sends the given capabilities.
186 *
187 * @param capabilities
188 */
189 private void sendCapabilities( WASCapabilities capabilities ) {
190 try {
191 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
192 WASCapabilitiesDocument document = XMLFactory.export( capabilities );
193 document.write( response.getOutputStream() );
194 } catch ( IOException e ) {
195 LOG.logError( "Error sending GetCapabilities response.", e );
196 }
197 }
198
199 /*
200 * (non-Javadoc)
201 *
202 * @see org.deegree.enterprise.servlet.ServiceDispatcher#perform(org.deegree.ogcwebservices.OGCWebServiceRequest,
203 * javax.servlet.http.HttpServletResponse)
204 */
205 public void perform( OGCWebServiceRequest request, HttpServletResponse response )
206 throws ServiceException, OGCWebServiceException {
207 Object result = null;
208 this.response = response;
209 if ( "WAS".equals( request.getServiceName() ) ) {
210 WAService service = WASServiceFactory.getUncachedWAService(); // get from factory
211 result = service.doService( request );
212 } else if ( "WSS".equals( request.getServiceName() ) ) {
213 WSService service = WASServiceFactory.getUncachedWSService(); // get from factory
214 result = service.doService( request );
215 }
216
217 try {
218 handleResult( result );
219 } catch ( IOException e ) {
220 LOG.logError( e.getLocalizedMessage(), e );
221 throw new OGCWebServiceException( "Error while handling request: \n"
222 + e.getLocalizedMessage() );
223 }
224 }
225
226 }