/*
* $Header: /home/cvspublic/jakarta-slide/src/webdav/server/org/apache/slide/webdav/method/VersionControlMethod.java,v 1.23.2.1 2004/02/05 16:11:23 mholz Exp $
* $Revision: 1.23.2.1 $
* $Date: 2004/02/05 16:11:23 $
*
* ====================================================================
*
* Copyright 1999-2002 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.slide.webdav.method;
import java.io.IOException;
import java.util.Iterator;
import org.apache.slide.common.Domain;
import org.apache.slide.common.NamespaceAccessToken;
import org.apache.slide.common.ServiceAccessException;
import org.apache.slide.macro.ForbiddenException;
import org.apache.slide.webdav.WebdavException;
import org.apache.slide.webdav.WebdavServletConfig;
import org.apache.slide.webdav.util.DeltavConstants;
import org.apache.slide.webdav.util.PreconditionViolationException;
import org.apache.slide.webdav.util.UriHandler;
import org.apache.slide.webdav.util.VersioningHelper;
import org.apache.util.WebdavStatus;
import org.jdom.Element;
import org.jdom.JDOMException;
/**
* VERSION-CONTROL method.
*
* @author <a href="mailto:peter.nevermann@softwareag.com">Peter Nevermann</a>
*/
public class VersionControlMethod extends AbstractWebdavMethod
implements DeltavConstants {
final static String VERSIONCONTROL_EXCLUDEPATH =
Domain.getParameter( I_VERSIONCONTROL_EXCLUDEPATH, I_VERSIONCONTROL_EXCLUDEPATH_DEFAULT );
/**
* Resource to be written.
*/
private String resourcePath;
/**
* The VERSION-CONTROL request can be used to create a new VCR for an existing
* version history (see 6.7 of RFC3253)
*/
private String existingVersionPath;
// ----------------------------------------------------------- Constructors
/**
* Constructor.
*
* @param token the token for accessing the namespace
* @param config configuration of the WebDAV servlet
*/
public VersionControlMethod(NamespaceAccessToken token,
WebdavServletConfig config) {
super(token, config);
}
/**
* Parse WebDAV XML query.
*
* @exception WebdavException
*/
protected void parseRequest() throws WebdavException {
// readRequestContent();
resourcePath = requestUri;
if (resourcePath == null) {
resourcePath = "/";
}
if( req.getContentLength() > 0 ) {
try{
Element ve = null;
Iterator i = parseRequestContent(E_VERSION_CONTROL).getChildren().iterator();
while( i.hasNext() ) {
Element e = (Element)i.next();
if( e.getName().equals(E_VERSION) ) {
// version element found
ve = e;
// get the href element
try {
Element hre = (Element)ve.getChildren().get(0);
if( hre == null || !hre.getName().equals(E_HREF) )
throw new Exception();
existingVersionPath = getSlidePath( hre.getText() );
}
catch( Exception x ) {
Domain.warn( E_VERSION+" element must contain "+E_HREF+" element" );
throw new JDOMException("<"+E_VERSION+"> element must contain <"+E_HREF+"> element" );
}
break;
}
}
}
catch (JDOMException e){
int statusCode = WebdavStatus.SC_BAD_REQUEST;
sendError( statusCode, e );
throw new WebdavException( statusCode );
}
catch( IOException e ){
int statusCode = WebdavStatus.SC_INTERNAL_SERVER_ERROR;
sendError( statusCode, e );
throw new WebdavException( statusCode );
}
}
}
/**
* Execute the request.
*
* @exception WebdavException
*/
protected void executeRequest() throws WebdavException, IOException {
// Prevent dirty reads
slideToken.setForceStoreEnlistment(true);
// check lock-null resources
try {
if (isLockNull(resourcePath)) {
int statusCode = WebdavStatus.SC_NOT_FOUND;
sendError( statusCode, "lock-null resource", new Object[]{resourcePath} );
throw new WebdavException( statusCode );
}
}
catch (ServiceAccessException e) {
int statusCode = getErrorCode((Exception)e);
sendError( statusCode, e );
throw new WebdavException( statusCode );
}
try {
UriHandler rUh = UriHandler.getUriHandler( resourcePath );
if( VERSIONCONTROL_EXCLUDEPATH != null && VERSIONCONTROL_EXCLUDEPATH.length() > 0 ) {
UriHandler exUh = UriHandler.getUriHandler( VERSIONCONTROL_EXCLUDEPATH );
if( exUh.isAncestorOf(rUh) )
throw new ForbiddenException(
resourcePath,
new Exception("The resource path has been excluded from version-control") );
}
VersioningHelper vh = VersioningHelper.getVersioningHelper(
slideToken, token, req, resp, getConfig() );
if( existingVersionPath == null )
vh.versionControl( resourcePath );
else
vh.versionControl( resourcePath, existingVersionPath );
}
catch (PreconditionViolationException e) {
sendPreconditionViolation(e);
throw e;
}
catch (Exception e) {
int statusCode = getErrorCode( e );
sendError( statusCode, e );
throw new WebdavException( statusCode );
}
}
}