001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.webdav.methods;
016    
017    import com.liferay.portal.kernel.webdav.Resource;
018    import com.liferay.portal.kernel.webdav.WebDAVException;
019    import com.liferay.portal.kernel.webdav.WebDAVRequest;
020    import com.liferay.portal.kernel.webdav.WebDAVStorage;
021    
022    import javax.servlet.http.HttpServletResponse;
023    
024    /**
025     * @author Brian Wing Shun Chan
026     * @author Alexander Chow
027     */
028    public class HeadMethodImpl implements Method {
029    
030            public int process(WebDAVRequest webDavRequest) throws WebDAVException {
031                    try {
032                            WebDAVStorage storage = webDavRequest.getWebDAVStorage();
033                            HttpServletResponse response =
034                                    webDavRequest.getHttpServletResponse();
035    
036                            Resource resource = storage.getResource(webDavRequest);
037    
038                            int status = HttpServletResponse.SC_NOT_FOUND;
039    
040                            if (resource == null) {
041                                    response.sendError(
042                                            HttpServletResponse.SC_NOT_FOUND, webDavRequest.getPath());
043                            }
044                            else {
045                                    if (!resource.isCollection()) {
046                                            response.setContentLength((int)resource.getSize());
047                                    }
048    
049                                    status = HttpServletResponse.SC_OK;
050                            }
051    
052                            return status;
053                    }
054                    catch (Exception e) {
055                            throw new WebDAVException(e);
056                    }
057            }
058    
059    }