001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/tags/2.1/src/org/deegree/enterprise/servlet/WASSHandler.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2004 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/exse/
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 Meckenheimer Allee 176
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 package org.deegree.enterprise.servlet;
045
046 import java.io.BufferedInputStream;
047 import java.io.IOException;
048 import java.io.InputStream;
049 import java.io.OutputStream;
050
051 import javax.servlet.http.HttpServletResponse;
052
053 import org.apache.commons.httpclient.Header;
054 import org.deegree.enterprise.ServiceException;
055 import org.deegree.framework.log.ILogger;
056 import org.deegree.framework.log.LoggerFactory;
057 import org.deegree.framework.util.CharsetUtils;
058 import org.deegree.ogcwebservices.OGCWebServiceException;
059 import org.deegree.ogcwebservices.OGCWebServiceRequest;
060 import org.deegree.ogcwebservices.wass.common.WASServiceFactory;
061 import org.deegree.ogcwebservices.wass.common.XMLFactory;
062 import org.deegree.ogcwebservices.wass.was.WAService;
063 import org.deegree.ogcwebservices.wass.was.capabilities.WASCapabilities;
064 import org.deegree.ogcwebservices.wass.was.capabilities.WASCapabilitiesDocument;
065 import org.deegree.ogcwebservices.wass.was.operation.DescribeUserResponse;
066 import org.deegree.ogcwebservices.wass.wss.WSService;
067 import org.deegree.ogcwebservices.wass.wss.capabilities.WSSCapabilities;
068 import org.deegree.ogcwebservices.wass.wss.capabilities.WSSCapabilitiesDocument;
069 import org.deegree.ogcwebservices.wass.wss.operation.DoServiceResponse;
070
071 /**
072 * This is the servlet handler class for the WASS services, ie, the Web
073 * Authentication Service and the Web Security Service. Attention: since much of
074 * the WAS/WSS behaviour is specified to be the same, much of the code of this
075 * class is shared, see for example the handleResult method.
076 *
077 * @see #handleResult(Object)
078 *
079 * @author <a href="mailto:schmitz@lat-lon.de">Andreas Schmitz</a>
080 * @author last edited by: $Author: bezema $
081 *
082 * @version 2.0, $Revision: 6259 $, $Date: 2007-03-20 10:15:15 +0100 (Di, 20 Mär 2007) $
083 *
084 * @since 2.0
085 */
086
087 public class WASSHandler extends AbstractOWServiceHandler implements ServiceDispatcher {
088
089 private static final ILogger LOG = LoggerFactory.getLogger( WASSHandler.class );
090
091 private HttpServletResponse response = null;
092
093 /**
094 * Method to handle the various output objects.
095 *
096 * @param result
097 * @throws IOException
098 */
099 private void handleResult( Object result )
100 throws IOException {
101 // if result is null, was possibly a CloseSession request, so return
102 // nothing as specified
103 if ( result == null ){
104 response.setContentType( "text/plain; charset=" + CharsetUtils.getSystemCharset() );
105 response.getWriter().println();
106 }
107
108 if ( result instanceof OGCWebServiceException ) {
109 sendException( response, (OGCWebServiceException) result );
110 } else if ( result instanceof Exception ) {
111 sendException( response, (Exception) result );
112 } else if ( result instanceof String ) {
113 // just write the SessionID result from GetSession request
114 response.setContentType( "text/plain; charset=" + CharsetUtils.getSystemCharset() );
115 response.getWriter().print( result );
116 } else if ( result instanceof WASCapabilities ) {
117 sendCapabilities( (WASCapabilities) result );
118 } else if ( result instanceof WSSCapabilities ) {
119 sendCapabilities( (WSSCapabilities) result );
120 } else if ( result instanceof DescribeUserResponse ) {
121 sendDescribeUserResponse( (DescribeUserResponse) result );
122 } else if ( result instanceof DoServiceResponse ) {
123 sendOtherServiceResponse( (DoServiceResponse) result );
124 }
125 }
126
127 /**
128 * Sends the XML document contained within the given parameter
129 *
130 * @param result
131 * @throws IOException
132 */
133 private void sendDescribeUserResponse( DescribeUserResponse result ) throws IOException {
134 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
135 result.write( response.getOutputStream() );
136 }
137
138 /**
139 * Method to send the result of another service.
140 *
141 * @param result
142 * @throws IOException
143 */
144 private void sendOtherServiceResponse( DoServiceResponse result )
145 throws IOException {
146 Header[] headers = result.getHeaders();
147 // footers will be ignored for now
148 // Header[] footers = result.getFooters();
149 InputStream in = result.getResponseBody();
150 for ( Header h : headers ) {
151 // maybe we have to filter some headers here TODO
152 LOG.logDebug( h.toExternalForm() );
153 response.setHeader( h.getName(), h.getValue() );
154 }
155 // BufferedReader bin = new BufferedReader( new InputStreamReader( in ) );
156 // PrintWriter out = response.getWriter();
157 BufferedInputStream bin = new BufferedInputStream( in );
158 OutputStream out = response.getOutputStream();
159 byte[] buf = new byte[4096];
160 int numberRead = 0;
161 while ( (numberRead = bin.read( buf )) != -1 ){
162 out.write( buf, 0, numberRead );
163 }
164 bin.close();
165 out.close();
166 }
167
168 /**
169 * Sends the given capabilities.
170 *
171 * @param capabilities
172 */
173 private void sendCapabilities( WSSCapabilities capabilities ) {
174 try {
175 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
176 WSSCapabilitiesDocument document = XMLFactory.export( capabilities );
177 document.write( response.getOutputStream() );
178 } catch ( IOException e ) {
179 LOG.logError( "Error sending GetCapabilities response.", e );
180 }
181 }
182
183 /**
184 * Sends the given capabilities.
185 *
186 * @param capabilities
187 */
188 private void sendCapabilities( WASCapabilities capabilities ) {
189 try {
190 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
191 WASCapabilitiesDocument document = XMLFactory.export( capabilities );
192 document.write( response.getOutputStream() );
193 } catch ( IOException e ) {
194 LOG.logError( "Error sending GetCapabilities response.", e );
195 }
196 }
197
198 /*
199 * (non-Javadoc)
200 *
201 * @see org.deegree.enterprise.servlet.ServiceDispatcher#perform(org.deegree.ogcwebservices.OGCWebServiceRequest,
202 * javax.servlet.http.HttpServletResponse)
203 */
204 public void perform( OGCWebServiceRequest request, HttpServletResponse response )
205 throws ServiceException, OGCWebServiceException {
206 Object result = null;
207 this.response = response;
208 if ( "WAS".equals( request.getServiceName() ) ) {
209 WAService service = WASServiceFactory.getUncachedWAService(); // get from factory
210 result = service.doService( request );
211 } else if ( "WSS".equals( request.getServiceName() ) ) {
212 WSService service = WASServiceFactory.getUncachedWSService(); // get from factory
213 result = service.doService( request );
214 }
215
216 try {
217 handleResult( result );
218 } catch ( IOException e ) {
219 LOG.logError( e.getLocalizedMessage(), e );
220 throw new OGCWebServiceException( "Error while handling request: \n"
221 + e.getLocalizedMessage() );
222 }
223 }
224
225 }
226
227 /* ******************************************************************************
228 * Changes to this class. What the people have been up to:
229 * $Log$
230 * Revision 1.11 2006/10/17 20:31:18 poth
231 * *** empty log message ***
232 *
233 * Revision 1.10 2006/08/29 11:41:45 schmitz
234 * Removed the newline when outputting the sessionID.
235 *
236 * Revision 1.9 2006/08/11 08:58:50 schmitz
237 * WAS implements the DescribeUser operation.
238 *
239 * Revision 1.8 2006/07/23 10:05:54 poth
240 * setting content type for Http responses enhanced by adding charset (for mime types text/plain and text/xml)
241 *
242 * Revision 1.7 2006/06/26 15:04:06 bezema
243 * Finished the wass
244 *
245 * Revision 1.6 2006/06/22 06:52:46 poth
246 * footer corrected
247 *
248 *
249 ***************************************************************************** */