ETagFilter.java |
1 /** 2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 package com.liferay.portal.servlet.filters.etag; 24 25 import com.liferay.portal.kernel.util.StringPool; 26 import com.liferay.portal.servlet.filters.BasePortalFilter; 27 import com.liferay.util.servlet.filters.CacheResponse; 28 import com.liferay.util.servlet.filters.CacheResponseData; 29 import com.liferay.util.servlet.filters.CacheResponseUtil; 30 31 import java.io.IOException; 32 33 import javax.servlet.FilterChain; 34 import javax.servlet.ServletException; 35 import javax.servlet.http.HttpServletRequest; 36 import javax.servlet.http.HttpServletResponse; 37 38 /** 39 * <a href="ETagFilter.java.html"><b><i>View Source</i></b></a> 40 * 41 * @author Eduardo Lundgren 42 * 43 */ 44 public class ETagFilter extends BasePortalFilter { 45 46 protected void processFilter( 47 HttpServletRequest request, HttpServletResponse response, 48 FilterChain filterChain) 49 throws IOException, ServletException { 50 51 CacheResponse cacheResponse = new CacheResponse( 52 response, StringPool.UTF8); 53 54 processFilter( 55 ETagFilter.class, request, cacheResponse, filterChain); 56 57 CacheResponseData cacheResponseData = new CacheResponseData( 58 cacheResponse.getData(), cacheResponse.getContentType(), 59 cacheResponse.getHeaders()); 60 61 if (!ETagUtil.processETag(request, response, cacheResponse.getData())) { 62 CacheResponseUtil.write(response, cacheResponseData); 63 } 64 } 65 66 }