org.efaps.webdav4vfs.handler.DeleteHandler.java Source code

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Here is the source code for org.efaps.webdav4vfs.handler.DeleteHandler.java

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/*
 * Copyright 2003 - 2010 The eFaps Team
 * Copyright 2007 Matthias L. Jugel.
 *
 * 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.
 *
 * Revision:        $Rev$
 * Last Changed:    $Date$
 * Last Changed By: $Author$
 */

package org.efaps.webdav4vfs.handler;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.text.ParseException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileSelectInfo;
import org.apache.commons.vfs.FileSelector;
import org.efaps.webdav4vfs.lock.LockException;
import org.efaps.webdav4vfs.lock.LockManager;
import org.efaps.webdav4vfs.vfs.VFSBackend;

/**
 * @author Matthias L. Jugel
 * @version $Id$
 */
public class DeleteHandler extends AbstractWebdavHandler {
    private static final Log LOG = LogFactory.getLog(DeleteHandler.class);

    private final static FileSelector ALL_FILES_SELECTOR = new FileSelector() {
        public boolean includeFile(FileSelectInfo fileSelectInfo) throws Exception {
            return true;
        }

        public boolean traverseDescendents(FileSelectInfo fileSelectInfo) throws Exception {
            return true;
        }
    };

    @Override
    public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
        FileObject object = VFSBackend.resolveFile(request.getPathInfo());

        try {
            String fragment = new URI(request.getRequestURI()).getFragment();
            if (fragment != null) {
                response.sendError(HttpServletResponse.SC_FORBIDDEN);
                return;
            }
        } catch (URISyntaxException e) {
            throw new IOException(e.getMessage());
        }

        try {
            if (!LockManager.getInstance().evaluateCondition(object, getIf(request)).result) {
                response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
                return;
            }
        } catch (LockException e) {
            response.sendError(SC_LOCKED);
            return;
        } catch (ParseException e) {
            response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
            return;
        }

        if (object.exists()) {
            int deletedObjects = object.delete(ALL_FILES_SELECTOR);
            LOG.debug("deleted " + deletedObjects + " objects");
            if (deletedObjects > 0) {
                response.setStatus(HttpServletResponse.SC_OK);
            } else {
                response.sendError(HttpServletResponse.SC_FORBIDDEN);
            }
        } else {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
        }
    }
}