001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/enterprise/servlet/WASSHandler.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.enterprise.servlet;
038
039 import static org.deegree.framework.log.LoggerFactory.getLogger;
040 import static org.deegree.framework.util.CharsetUtils.getSystemCharset;
041
042 import java.io.BufferedInputStream;
043 import java.io.IOException;
044 import java.io.InputStream;
045 import java.io.OutputStream;
046
047 import javax.servlet.http.HttpServletResponse;
048
049 import org.apache.commons.httpclient.Header;
050 import org.deegree.enterprise.ServiceException;
051 import org.deegree.framework.log.ILogger;
052 import org.deegree.framework.util.CharsetUtils;
053 import org.deegree.ogcwebservices.OGCWebServiceException;
054 import org.deegree.ogcwebservices.OGCWebServiceRequest;
055 import org.deegree.ogcwebservices.wass.common.WASServiceFactory;
056 import org.deegree.ogcwebservices.wass.common.XMLFactory;
057 import org.deegree.ogcwebservices.wass.was.WAService;
058 import org.deegree.ogcwebservices.wass.was.capabilities.WASCapabilities;
059 import org.deegree.ogcwebservices.wass.was.capabilities.WASCapabilitiesDocument;
060 import org.deegree.ogcwebservices.wass.was.operation.DescribeUserResponse;
061 import org.deegree.ogcwebservices.wass.wss.WSService;
062 import org.deegree.ogcwebservices.wass.wss.capabilities.WSSCapabilities;
063 import org.deegree.ogcwebservices.wass.wss.capabilities.WSSCapabilitiesDocument;
064 import org.deegree.ogcwebservices.wass.wss.operation.DoServiceResponse;
065
066 /**
067 * This is the servlet handler class for the WASS services, ie, the Web Authentication Service and the Web Security
068 * Service. Attention: since much of the WAS/WSS behaviour is specified to be the same, much of the code of this class
069 * is shared, see for example the handleResult method.
070 *
071 * @see #handleResult(Object)
072 *
073 * @author <a href="mailto:schmitz@lat-lon.de">Andreas Schmitz</a>
074 * @author last edited by: $Author: mschneider $
075 *
076 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
077 */
078 public class WASSHandler extends AbstractOWServiceHandler {
079
080 private static final ILogger LOG = getLogger( WASSHandler.class );
081
082 private HttpServletResponse response = null;
083
084 /**
085 * Method to handle the various output objects.
086 *
087 * @param result
088 * @throws IOException
089 */
090 private void handleResult( Object result )
091 throws IOException {
092 // if result is null, was possibly a CloseSession request, so return
093 // nothing as specified
094 if ( result == null ) {
095 response.setContentType( "text/plain; charset=" + getSystemCharset() );
096 response.getWriter().println();
097 }
098
099 if ( result instanceof OGCWebServiceException ) {
100 sendException( response, (OGCWebServiceException) result );
101 } else if ( result instanceof Exception ) {
102 sendException( response, (Exception) result );
103 } else if ( result instanceof String ) {
104 // just write the SessionID result from GetSession request
105 response.setContentType( "text/plain; charset=" + getSystemCharset() );
106 response.getWriter().print( result );
107 } else if ( result instanceof WASCapabilities ) {
108 sendCapabilities( (WASCapabilities) result );
109 } else if ( result instanceof WSSCapabilities ) {
110 sendCapabilities( (WSSCapabilities) result );
111 } else if ( result instanceof DescribeUserResponse ) {
112 sendDescribeUserResponse( (DescribeUserResponse) result );
113 } else if ( result instanceof DoServiceResponse ) {
114 sendOtherServiceResponse( (DoServiceResponse) result );
115 }
116 }
117
118 /**
119 * Sends the XML document contained within the given parameter
120 *
121 * @param result
122 * @throws IOException
123 */
124 private void sendDescribeUserResponse( DescribeUserResponse result )
125 throws IOException {
126 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
127 result.write( response.getOutputStream() );
128 }
129
130 /**
131 * Method to send the result of another service.
132 *
133 * @param result
134 * @throws IOException
135 */
136 private void sendOtherServiceResponse( DoServiceResponse result )
137 throws IOException {
138 Header[] headers = result.getHeaders();
139 // footers will be ignored for now
140 // Header[] footers = result.getFooters();
141 InputStream in = result.getResponseBody();
142 for ( Header h : headers ) {
143 // maybe we have to filter some headers here TODO
144 LOG.logDebug( h.toExternalForm() );
145 // ignore content length header, as the content length actually changes for GetCapabilities responses
146 // (facade URLs and possibly encoding). Otherwise parts of the response may get cut off.
147 if ( !h.getName().equalsIgnoreCase( "content-length" ) ) {
148 response.setHeader( h.getName(), h.getValue() );
149 }
150 }
151
152 BufferedInputStream bin = new BufferedInputStream( in, 16384 );
153 OutputStream out = response.getOutputStream();
154 byte[] buf = new byte[16384];
155 int numberRead = 0;
156 while ( ( numberRead = bin.read( buf ) ) != -1 ) {
157 out.write( buf, 0, numberRead );
158 }
159 bin.close();
160 out.close();
161 }
162
163 /**
164 * Sends the given capabilities.
165 *
166 * @param capabilities
167 */
168 private void sendCapabilities( WSSCapabilities capabilities ) {
169 try {
170 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
171 WSSCapabilitiesDocument document = XMLFactory.export( capabilities );
172 document.write( response.getOutputStream() );
173 } catch ( IOException e ) {
174 LOG.logError( "Error sending GetCapabilities response.", e );
175 }
176 }
177
178 /**
179 * Sends the given capabilities.
180 *
181 * @param capabilities
182 */
183 private void sendCapabilities( WASCapabilities capabilities ) {
184 try {
185 response.setContentType( "text/xml; charset=" + CharsetUtils.getSystemCharset() );
186 WASCapabilitiesDocument document = XMLFactory.export( capabilities );
187 document.write( response.getOutputStream() );
188 } catch ( IOException e ) {
189 LOG.logError( "Error sending GetCapabilities response.", e );
190 }
191 }
192
193 /*
194 * (non-Javadoc)
195 *
196 * @see org.deegree.enterprise.servlet.ServiceDispatcher#perform(org.deegree.ogcwebservices.OGCWebServiceRequest,
197 * javax.servlet.http.HttpServletResponse)
198 */
199 public void perform( OGCWebServiceRequest request, HttpServletResponse response )
200 throws ServiceException, OGCWebServiceException {
201 Object result = null;
202 this.response = response;
203 if ( "WAS".equals( request.getServiceName() ) ) {
204 WAService service = WASServiceFactory.getUncachedWAService(); // get from factory
205 result = service.doService( request );
206 } else if ( "WSS".equals( request.getServiceName() ) ) {
207 WSService service = WASServiceFactory.getUncachedWSService(); // get from factory
208 result = service.doService( request );
209 }
210
211 try {
212 handleResult( result );
213 } catch ( IOException e ) {
214 LOG.logError( e.getLocalizedMessage(), e );
215 throw new OGCWebServiceException( "Error while handling request: \n" + e.getLocalizedMessage() );
216 }
217 }
218
219 }