001 package org.apache.myfaces.tobago.util; 002 003 /* 004 * Licensed to the Apache Software Foundation (ASF) under one or more 005 * contributor license agreements. See the NOTICE file distributed with 006 * this work for additional information regarding copyright ownership. 007 * The ASF licenses this file to You under the Apache License, Version 2.0 008 * (the "License"); you may not use this file except in compliance with 009 * the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, software 014 * distributed under the License is distributed on an "AS IS" BASIS, 015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 016 * See the License for the specific language governing permissions and 017 * limitations under the License. 018 */ 019 020 import org.apache.myfaces.tobago.context.ClientProperties; 021 022 import javax.faces.context.ExternalContext; 023 import javax.faces.context.FacesContext; 024 import javax.servlet.http.HttpServletResponse; 025 026 /* 027 * Date: Oct 21, 2006 028 * Time: 10:39:25 AM 029 */ 030 public class ResponseUtils { 031 032 public static void ensureNoCacheHeader(ExternalContext externalContext) { 033 // TODO PortletRequest 034 if (externalContext.getResponse() instanceof HttpServletResponse) { 035 HttpServletResponse response = (HttpServletResponse) externalContext.getResponse(); 036 response.setHeader("Cache-Control", "no-cache,no-store,max-age=0,must-revalidate"); 037 response.setHeader("Pragma", "no-cache"); 038 response.setDateHeader("Expires", 0); 039 response.setDateHeader("max-age", 0); 040 } 041 } 042 043 public static void ensureContentTypeHeader(FacesContext facesContext, String charset) { 044 // TODO PortletRequest 045 if (facesContext.getExternalContext().getResponse() instanceof HttpServletResponse) { 046 HttpServletResponse response = (HttpServletResponse) facesContext.getExternalContext().getResponse(); 047 response.setContentType(generateContentType(facesContext, charset)); 048 } 049 } 050 051 private static String generateContentType(FacesContext facesContext, String charset) { 052 StringBuilder sb = new StringBuilder("text/"); 053 ClientProperties clientProperties 054 = ClientProperties.getInstance(facesContext.getViewRoot()); 055 sb.append(clientProperties.getContentType()); 056 if (charset == null) { 057 charset = "UTF-8"; 058 } 059 sb.append("; charset="); 060 sb.append(charset); 061 return sb.toString(); 062 } 063 }