001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
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    }