1 /** 2 * This file Copyright (c) 2008-2010 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.cms.util; 35 36 import java.util.Enumeration; 37 38 import javax.servlet.http.HttpServletRequest; 39 import javax.servlet.http.HttpServletResponse; 40 41 public class RequestHeaderUtil { 42 43 public static boolean acceptsGzipEncoding(HttpServletRequest request) { 44 return acceptsEncoding(request, "gzip"); 45 } 46 47 public static boolean acceptsEncoding(final HttpServletRequest request, final String name) { 48 return headerContains(request, "Accept-Encoding", name); 49 } 50 51 public static boolean headerContains(final HttpServletRequest request, final String header, final String value) { 52 final Enumeration accepted = request.getHeaders(header); 53 while (accepted.hasMoreElements()) { 54 final String headerValue = (String) accepted.nextElement(); 55 if (headerValue.indexOf(value) != -1) { 56 return true; 57 } 58 } 59 return false; 60 } 61 62 public static void addAndVerifyHeader(HttpServletResponse response, String name, String value) { 63 response.addHeader(name, value); 64 final boolean containsHeader = response.containsHeader(name); 65 if (!containsHeader) { 66 throw new IllegalStateException("Failure when attempting to set response header " + name + ": " + value); 67 } 68 } 69 }