/*
* $Header: /home/cvs/jakarta-slide/src/webdav/server/org/apache/slide/webdav/method/BindMethod.java,v 1.11.2.1 2004/02/05 16:11:23 mholz Exp $
* $Revision: 1.11.2.1 $
* $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.List;
import org.apache.slide.common.NamespaceAccessToken;
import org.apache.slide.common.ServiceAccessException;
import org.apache.slide.common.SlideException;
import org.apache.slide.common.SlideToken;
import org.apache.slide.lock.ObjectLockedException;
import org.apache.slide.structure.CrossServerBindingException;
import org.apache.slide.structure.ObjectNode;
import org.apache.slide.webdav.WebdavException;
import org.apache.slide.webdav.WebdavServletConfig;
import org.apache.slide.webdav.util.BindConstants;
import org.apache.slide.webdav.util.PreconditionViolationException;
import org.apache.slide.webdav.util.ViolatedPrecondition;
import org.apache.util.WebdavStatus;
import org.jdom.JDOMException;
/**
* BIND method.
*
* @author <a href="mailto:peter.nevermann@softwareag.com">Peter Nevermann</a>
*/
public class BindMethod extends AbstractWebdavMethod implements BindConstants {
private String sourceUri;
private String collectionUri;
private String segment;
private boolean overwrite;
private ObjectNode sourceNode = null;
private ObjectNode collectionNode = null;
/**
* Constructor.
*
* @param token the token for accessing the namespace
* @param config configuration of the WebDAV servlet
*/
public BindMethod(NamespaceAccessToken token, WebdavServletConfig config) {
super(token, config);
}
/**
* Parse WebDAV XML query.
*
* @exception WebdavException
*/
protected void parseRequest() throws WebdavException {
List content;
// readRequestContent();
try{
content = parseRequestContent(E_BIND).getChildren();
segment = MethodUtil.getChildText(content, E_SEGMENT);
sourceUri = parseUri(MethodUtil.getChildUrl(content, E_HREF));
}
catch (IOException e) { // TODO: merge exception handling into jdom access methods
int statusCode = WebdavStatus.SC_INTERNAL_SERVER_ERROR;
sendError( statusCode, e );
throw new WebdavException( statusCode );
}
catch (JDOMException e) { // TODO: merge exception handling into jdom access methods
int statusCode = WebdavStatus.SC_BAD_REQUEST;
sendError( statusCode, e );
throw new WebdavException( statusCode );
}
collectionUri = requestUri;
if (collectionUri == null) {
collectionUri = "/";
}
overwrite = requestHeaders.getOverwrite(true);
}
/**
* Method checkPreconditions
*
* @throws PreconditionViolationException
*
*/
private void checkPreconditions() throws PreconditionViolationException, ServiceAccessException {
resp.setStatus( WebdavStatus.SC_CREATED );
// use a non-blocking slide token.
SlideToken stoken = readonlySlideToken();
try {
collectionNode = structure.retrieve( stoken, collectionUri );
}
catch( ServiceAccessException e ) {
throw e;
}
catch (SlideException e) {} // ignore silently
try {
sourceNode = structure.retrieve( stoken, sourceUri );
}
catch( ServiceAccessException e ) {
throw e;
}
catch (Exception e) {} // ignore silently
if (collectionNode == null || !isCollection(collectionUri)) {
throw new PreconditionViolationException(
new ViolatedPrecondition(C_BIND_INTO_COLLECTION, WebdavStatus.SC_CONFLICT), collectionUri);
}
if (!MethodUtil.isValidSegment(segment)) {
throw new PreconditionViolationException(
new ViolatedPrecondition(C_NAME_ALLOWED, WebdavStatus.SC_FORBIDDEN), segment);
}
if (sourceNode == null) {
throw new PreconditionViolationException(
new ViolatedPrecondition(C_BIND_SOURCE_EXISTS, WebdavStatus.SC_CONFLICT), sourceUri);
}
if (collectionNode.hasBinding(segment)) {
if (overwrite) {
resp.setStatus( WebdavStatus.SC_NO_CONTENT );
}
else {
throw new PreconditionViolationException(
new ViolatedPrecondition(C_CAN_OVERWRITE, WebdavStatus.SC_FORBIDDEN), segment);
}
}
if (isCollection(sourceUri)) {
if (isDescendant(collectionNode, sourceNode)) {
throw new PreconditionViolationException(
new ViolatedPrecondition(C_CYCLE_ALLOWED, WebdavStatus.SC_FORBIDDEN), sourceUri);
}
}
}
/**
* Execute the request.
*
* @exception WebdavException
*/
protected void executeRequest() throws WebdavException, IOException {
// Prevent dirty reads
slideToken.setForceStoreEnlistment(true);
// check lock-null resources
try {
if (isLockNull(collectionUri)) {
int statusCode = WebdavStatus.SC_NOT_FOUND;
sendError( statusCode, "lock-null resource", new Object[]{collectionUri} );
throw new WebdavException( statusCode );
}
}
catch (ServiceAccessException e) {
int statusCode = getErrorCode( e );
sendError( statusCode, e );
throw new WebdavException( statusCode );
}
try {
checkPreconditions();
structure.addBinding( slideToken, collectionNode, segment, sourceNode );
}
catch (ObjectLockedException e) {
ViolatedPrecondition violatedPrecondition;
if (collectionUri.equals(e.getObjectUri())) {
violatedPrecondition =
new ViolatedPrecondition(C_LOCKED_UPDATE_ALLOWED, WebdavStatus.SC_LOCKED);
}
else {
violatedPrecondition =
new ViolatedPrecondition(C_LOCKED_OVERWRITE_ALLOWED, WebdavStatus.SC_CONFLICT);
}
sendPreconditionViolation(
new PreconditionViolationException(violatedPrecondition, collectionNode.getUri())
);
}
catch (CrossServerBindingException e) {
sendPreconditionViolation(
new PreconditionViolationException(
new ViolatedPrecondition(C_CROSS_SERVER_BINDING, WebdavStatus.SC_FORBIDDEN),
collectionNode.getUri()
)
);
}
catch (PreconditionViolationException e) {
sendPreconditionViolation(e);
throw e;
}
catch (Exception e) {
int statusCode = getErrorCode( e );
sendError( statusCode, e );
throw new WebdavException( statusCode );
}
}
}