com.thinkberg.webdav.OptionsHandler.java Source code

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Here is the source code for com.thinkberg.webdav.OptionsHandler.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.vfs.VFSBackend;
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;

/**
 * @author Matthias L. Jugel
 * @version $Id$
 */
public class OptionsHandler extends WebdavHandler {

    public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setHeader("DAV", "1, 2");

        String path = request.getPathInfo();
        StringBuffer options = new StringBuffer();
        FileObject object = VFSBackend.resolveFile(path);
        if (object.exists()) {
            options.append("OPTIONS, GET, HEAD, POST, DELETE, TRACE, COPY, MOVE, LOCK, UNLOCK, PROPFIND");
            if (FileType.FOLDER.equals(object.getType())) {
                options.append(", PUT");
            }
        } else {
            options.append("OPTIONS, MKCOL, PUT, LOCK");
        }
        response.setHeader("Allow", options.toString());

        // see: http://www-128.ibm.com/developerworks/rational/library/2089.html
        response.setHeader("MS-Author-Via", "DAV");
    }
}