com.thinkberg.webdav.PutHandler.java Source code

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Here is the source code for com.thinkberg.webdav.PutHandler.java

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/*
 * 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.
 */

package com.thinkberg.webdav;

import com.thinkberg.webdav.lock.LockException;
import com.thinkberg.webdav.lock.LockManager;
import com.thinkberg.webdav.vfs.VFSBackend;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileType;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.ParseException;

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

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

        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;
        }
        // it is forbidden to write data on a folder
        if (object.exists() && FileType.FOLDER.equals(object.getType())) {
            response.sendError(HttpServletResponse.SC_FORBIDDEN);
            return;
        }

        FileObject parent = object.getParent();
        if (!parent.exists()) {
            response.sendError(HttpServletResponse.SC_FORBIDDEN);
            return;
        }

        if (!FileType.FOLDER.equals(parent.getType())) {
            response.sendError(HttpServletResponse.SC_CONFLICT);
            return;
        }

        InputStream is = request.getInputStream();
        OutputStream os = object.getContent().getOutputStream();
        long bytesCopied = Util.copyStream(is, os);
        String contentLengthHeader = request.getHeader("Content-length");
        LOG.debug(String.format("sent %d/%s bytes", bytesCopied,
                contentLengthHeader == null ? "unknown" : contentLengthHeader));
        os.flush();
        object.close();

        response.setStatus(HttpServletResponse.SC_CREATED);
    }
}