001    /**
002     * Copyright (c) 2000-2013 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    import com.liferay.portal.kernel.webdav.methods.Method;
022    
023    import javax.servlet.http.HttpServletResponse;
024    
025    /**
026     * @author Brian Wing Shun Chan
027     * @author Alexander Chow
028     */
029    public class HeadMethodImpl implements Method {
030    
031            @Override
032            public int process(WebDAVRequest webDAVRequest) throws WebDAVException {
033                    try {
034                            WebDAVStorage storage = webDAVRequest.getWebDAVStorage();
035                            HttpServletResponse response =
036                                    webDAVRequest.getHttpServletResponse();
037    
038                            Resource resource = storage.getResource(webDAVRequest);
039    
040                            if (resource == null) {
041                                    return HttpServletResponse.SC_NOT_FOUND;
042                            }
043    
044                            if (!resource.isCollection()) {
045                                    response.setContentLength((int)resource.getSize());
046                            }
047    
048                            return HttpServletResponse.SC_OK;
049                    }
050                    catch (Exception e) {
051                            throw new WebDAVException(e);
052                    }
053            }
054    
055    }