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net.sf.webdav.methods.DoCopy Maven / Gradle / Ivy
/*
* Copyright 1999,2004 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 net.sf.webdav.methods;
import java.io.IOException;
import java.util.Hashtable;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.webdav.ITransaction;
import net.sf.webdav.IWebdavStore;
import net.sf.webdav.StoredObject;
import net.sf.webdav.WebdavStatus;
import net.sf.webdav.exceptions.AccessDeniedException;
import net.sf.webdav.exceptions.LockFailedException;
import net.sf.webdav.exceptions.ObjectAlreadyExistsException;
import net.sf.webdav.exceptions.ObjectNotFoundException;
import net.sf.webdav.exceptions.WebdavException;
import net.sf.webdav.fromcatalina.RequestUtil;
import net.sf.webdav.locking.ResourceLocks;
public class DoCopy extends AbstractMethod {
private static org.slf4j.Logger LOG = org.slf4j.LoggerFactory
.getLogger(DoCopy.class);
private IWebdavStore _store;
private ResourceLocks _resourceLocks;
private DoDelete _doDelete;
private boolean _readOnly;
public DoCopy(IWebdavStore store, ResourceLocks resourceLocks,
DoDelete doDelete, boolean readOnly) {
_store = store;
_resourceLocks = resourceLocks;
_doDelete = doDelete;
_readOnly = readOnly;
}
public void execute(ITransaction transaction, HttpServletRequest req,
HttpServletResponse resp) throws IOException, LockFailedException {
LOG.trace("-- " + this.getClass().getName());
String path = getRelativePath(req);
if (!_readOnly) {
String tempLockOwner = "doCopy" + System.currentTimeMillis()
+ req.toString();
if (_resourceLocks.lock(transaction, path, tempLockOwner, false, 0,
TEMP_TIMEOUT, TEMPORARY)) {
try {
if (!copyResource(transaction, req, resp))
return;
} catch (AccessDeniedException e) {
resp.sendError(WebdavStatus.SC_FORBIDDEN);
} catch (ObjectAlreadyExistsException e) {
resp.sendError(WebdavStatus.SC_CONFLICT, req
.getRequestURI());
} catch (ObjectNotFoundException e) {
resp.sendError(WebdavStatus.SC_NOT_FOUND, req
.getRequestURI());
} catch (WebdavException e) {
resp.sendError(WebdavStatus.SC_INTERNAL_SERVER_ERROR);
} finally {
_resourceLocks.unlockTemporaryLockedObjects(transaction,
path, tempLockOwner);
}
} else {
resp.sendError(WebdavStatus.SC_INTERNAL_SERVER_ERROR);
}
} else {
resp.sendError(WebdavStatus.SC_FORBIDDEN);
}
}
/**
* Copy a resource.
*
* @param transaction
* indicates that the method is within the scope of a WebDAV
* transaction
* @param req
* Servlet request
* @param resp
* Servlet response
* @return true if the copy is successful
* @throws WebdavException
* if an error in the underlying store occurs
* @throws IOException
* when an error occurs while sending the response
* @throws LockFailedException
*/
public boolean copyResource(ITransaction transaction,
HttpServletRequest req, HttpServletResponse resp)
throws WebdavException, IOException, LockFailedException {
// Parsing destination header
String destinationPath = parseDestinationHeader(req, resp);
if (destinationPath == null)
return false;
String path = getRelativePath(req);
if (path.equals(destinationPath)) {
resp.sendError(WebdavStatus.SC_FORBIDDEN);
return false;
}
Hashtable errorList = new Hashtable();
String parentDestinationPath = getParentPath(getCleanPath(destinationPath));
if (!checkLocks(transaction, req, resp, _resourceLocks,
parentDestinationPath)) {
errorList.put(parentDestinationPath, WebdavStatus.SC_LOCKED);
sendReport(req, resp, errorList);
return false; // parentDestination is locked
}
if (!checkLocks(transaction, req, resp, _resourceLocks, destinationPath)) {
errorList.put(destinationPath, WebdavStatus.SC_LOCKED);
sendReport(req, resp, errorList);
return false; // destination is locked
}
// Parsing overwrite header
boolean overwrite = true;
String overwriteHeader = req.getHeader("Overwrite");
if (overwriteHeader != null) {
overwrite = overwriteHeader.equalsIgnoreCase("T");
}
// Overwriting the destination
String lockOwner = "copyResource" + System.currentTimeMillis()
+ req.toString();
if (_resourceLocks.lock(transaction, destinationPath, lockOwner, false,
0, TEMP_TIMEOUT, TEMPORARY)) {
StoredObject copySo, destinationSo = null;
try {
copySo = _store.getStoredObject(transaction, path);
// Retrieve the resources
if (copySo == null) {
resp.sendError(HttpServletResponse.SC_NOT_FOUND);
return false;
}
if (copySo.isNullResource()) {
String methodsAllowed = DeterminableMethod
.determineMethodsAllowed(copySo);
resp.addHeader("Allow", methodsAllowed);
resp.sendError(WebdavStatus.SC_METHOD_NOT_ALLOWED);
return false;
}
errorList = new Hashtable();
destinationSo = _store.getStoredObject(transaction,
destinationPath);
if (overwrite) {
// Delete destination resource, if it exists
if (destinationSo != null) {
_doDelete.deleteResource(transaction, destinationPath,
errorList, req, resp);
} else {
resp.setStatus(WebdavStatus.SC_CREATED);
}
} else {
// If the destination exists, then it's a conflict
if (destinationSo != null) {
resp.sendError(WebdavStatus.SC_PRECONDITION_FAILED);
return false;
} else {
resp.setStatus(WebdavStatus.SC_CREATED);
}
}
copy(transaction, path, destinationPath, errorList, req, resp);
if (!errorList.isEmpty()) {
sendReport(req, resp, errorList);
}
} finally {
_resourceLocks.unlockTemporaryLockedObjects(transaction,
destinationPath, lockOwner);
}
} else {
resp.sendError(WebdavStatus.SC_INTERNAL_SERVER_ERROR);
return false;
}
return true;
}
/**
* copies the specified resource(s) to the specified destination.
* preconditions must be handled by the caller. Standard status codes must
* be handled by the caller. a multi status report in case of errors is
* created here.
*
* @param transaction
* indicates that the method is within the scope of a WebDAV
* transaction
* @param sourcePath
* path from where to read
* @param destinationPath
* path where to write
* @param req
* HttpServletRequest
* @param resp
* HttpServletResponse
* @throws WebdavException
* if an error in the underlying store occurs
* @throws IOException
*/
private void copy(ITransaction transaction, String sourcePath,
String destinationPath, Hashtable errorList,
HttpServletRequest req, HttpServletResponse resp)
throws WebdavException, IOException {
StoredObject sourceSo = _store.getStoredObject(transaction, sourcePath);
if (sourceSo.isResource()) {
_store.createResource(transaction, destinationPath);
long resourceLength = _store.setResourceContent(transaction,
destinationPath, _store.getResourceContent(transaction,
sourcePath), null, null);
if (resourceLength != -1) {
StoredObject destinationSo = _store.getStoredObject(
transaction, destinationPath);
destinationSo.setResourceLength(resourceLength);
}
} else {
if (sourceSo.isFolder()) {
copyFolder(transaction, sourcePath, destinationPath, errorList,
req, resp);
} else {
resp.sendError(WebdavStatus.SC_NOT_FOUND);
}
}
}
/**
* helper method of copy() recursively copies the FOLDER at source path to
* destination path
*
* @param transaction
* indicates that the method is within the scope of a WebDAV
* transaction
* @param sourcePath
* where to read
* @param destinationPath
* where to write
* @param errorList
* all errors that ocurred
* @param req
* HttpServletRequest
* @param resp
* HttpServletResponse
* @throws WebdavException
* if an error in the underlying store occurs
*/
private void copyFolder(ITransaction transaction, String sourcePath,
String destinationPath, Hashtable errorList,
HttpServletRequest req, HttpServletResponse resp)
throws WebdavException {
_store.createFolder(transaction, destinationPath);
boolean infiniteDepth = true;
String depth = req.getHeader("Depth");
if (depth != null) {
if (depth.equals("0")) {
infiniteDepth = false;
}
}
if (infiniteDepth) {
String[] children = _store
.getChildrenNames(transaction, sourcePath);
children = children == null ? new String[] {} : children;
StoredObject childSo;
for (int i = children.length - 1; i >= 0; i--) {
children[i] = "/" + children[i];
try {
childSo = _store.getStoredObject(transaction,
(sourcePath + children[i]));
if (childSo.isResource()) {
_store.createResource(transaction, destinationPath
+ children[i]);
long resourceLength = _store.setResourceContent(
transaction, destinationPath + children[i],
_store.getResourceContent(transaction,
sourcePath + children[i]), null, null);
if (resourceLength != -1) {
StoredObject destinationSo = _store
.getStoredObject(transaction,
destinationPath + children[i]);
destinationSo.setResourceLength(resourceLength);
}
} else {
copyFolder(transaction, sourcePath + children[i],
destinationPath + children[i], errorList, req,
resp);
}
} catch (AccessDeniedException e) {
errorList.put(destinationPath + children[i], new Integer(
WebdavStatus.SC_FORBIDDEN));
} catch (ObjectNotFoundException e) {
errorList.put(destinationPath + children[i], new Integer(
WebdavStatus.SC_NOT_FOUND));
} catch (ObjectAlreadyExistsException e) {
errorList.put(destinationPath + children[i], new Integer(
WebdavStatus.SC_CONFLICT));
} catch (WebdavException e) {
errorList.put(destinationPath + children[i], new Integer(
WebdavStatus.SC_INTERNAL_SERVER_ERROR));
}
}
}
}
/**
* Parses and normalizes the destination header.
*
* @param req
* Servlet request
* @param resp
* Servlet response
* @return destinationPath
* @throws IOException
* if an error occurs while sending response
*/
private String parseDestinationHeader(HttpServletRequest req,
HttpServletResponse resp) throws IOException {
String destinationPath = req.getHeader("Destination");
if (destinationPath == null) {
resp.sendError(WebdavStatus.SC_BAD_REQUEST);
return null;
}
// Remove url encoding from destination
destinationPath = RequestUtil.URLDecode(destinationPath, "UTF8");
int protocolIndex = destinationPath.indexOf("://");
if (protocolIndex >= 0) {
// if the Destination URL contains the protocol, we can safely
// trim everything upto the first "/" character after "://"
int firstSeparator = destinationPath
.indexOf("/", protocolIndex + 4);
if (firstSeparator < 0) {
destinationPath = "/";
} else {
destinationPath = destinationPath.substring(firstSeparator);
}
} else {
String hostName = req.getServerName();
if ((hostName != null) && (destinationPath.startsWith(hostName))) {
destinationPath = destinationPath.substring(hostName.length());
}
int portIndex = destinationPath.indexOf(":");
if (portIndex >= 0) {
destinationPath = destinationPath.substring(portIndex);
}
if (destinationPath.startsWith(":")) {
int firstSeparator = destinationPath.indexOf("/");
if (firstSeparator < 0) {
destinationPath = "/";
} else {
destinationPath = destinationPath.substring(firstSeparator);
}
}
}
// Normalize destination path (remove '.' and' ..')
destinationPath = normalize(destinationPath);
String contextPath = req.getContextPath();
if ((contextPath != null) && (destinationPath.startsWith(contextPath))) {
destinationPath = destinationPath.substring(contextPath.length());
}
String pathInfo = req.getPathInfo();
if (pathInfo != null) {
String servletPath = req.getServletPath();
if ((servletPath != null)
&& (destinationPath.startsWith(servletPath))) {
destinationPath = destinationPath.substring(servletPath
.length());
}
}
return destinationPath;
}
/**
* Return a context-relative path, beginning with a "/", that represents the
* canonical version of the specified path after ".." and "." elements are
* resolved out. If the specified path attempts to go outside the boundaries
* of the current context (i.e. too many ".." path elements are present),
* return null instead.
*
* @param path
* Path to be normalized
* @return normalized path
*/
protected String normalize(String path) {
if (path == null)
return null;
// Create a place for the normalized path
String normalized = path;
if (normalized.equals("/."))
return "/";
// Normalize the slashes and add leading slash if necessary
if (normalized.indexOf('\\') >= 0)
normalized = normalized.replace('\\', '/');
if (!normalized.startsWith("/"))
normalized = "/" + normalized;
// Resolve occurrences of "//" in the normalized path
while (true) {
int index = normalized.indexOf("//");
if (index < 0)
break;
normalized = normalized.substring(0, index)
+ normalized.substring(index + 1);
}
// Resolve occurrences of "/./" in the normalized path
while (true) {
int index = normalized.indexOf("/./");
if (index < 0)
break;
normalized = normalized.substring(0, index)
+ normalized.substring(index + 2);
}
// Resolve occurrences of "/../" in the normalized path
while (true) {
int index = normalized.indexOf("/../");
if (index < 0)
break;
if (index == 0)
return (null); // Trying to go outside our context
int index2 = normalized.lastIndexOf('/', index - 1);
normalized = normalized.substring(0, index2)
+ normalized.substring(index + 3);
}
// Return the normalized path that we have completed
return (normalized);
}
}
