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 javax.faces.context.ExternalContext;
021    import javax.faces.context.FacesContext;
022    import javax.servlet.http.HttpServletResponse;
023    
024    /*
025     * Date: Oct 21, 2006
026     * Time: 10:39:25 AM
027     */
028    public class ResponseUtils {
029    
030      public static void ensureNoCacheHeader(ExternalContext externalContext) {
031        // TODO PortletRequest
032        if (externalContext.getResponse() instanceof HttpServletResponse) {
033          HttpServletResponse response = (HttpServletResponse) externalContext.getResponse();
034          response.setHeader("Cache-Control", "no-cache,no-store,max-age=0,must-revalidate");
035          response.setHeader("Pragma", "no-cache");
036          response.setDateHeader("Expires", 0);
037          response.setDateHeader("max-age", 0);
038        }
039      }
040    
041      public static void ensureContentTypeHeader(FacesContext facesContext, String contentType) {
042        // TODO PortletRequest
043        if (facesContext.getExternalContext().getResponse() instanceof HttpServletResponse) {
044          HttpServletResponse response = (HttpServletResponse) facesContext.getExternalContext().getResponse();
045          response.setContentType(contentType);
046        }
047      }
048    }