/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cocoon.portal.event.aspect.impl;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Response;
import org.apache.cocoon.portal.PortalService;
import org.apache.cocoon.portal.event.aspect.EventAspect;
import org.apache.cocoon.portal.event.aspect.EventAspectContext;
/**
* This aspect implementation sets some headers on the response that tell
* clients/proxies to not cache. This "disables" the back button on the
* client.
*
* @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
*
* @version CVS $Id: NoClientCachingEventAspect.java 433543 2006-08-22 06:22:54Z crossley $
*/
public class NoClientCachingEventAspect
extends AbstractLogEnabled
implements EventAspect,
ThreadSafe {
/**
* @see org.apache.cocoon.portal.event.aspect.EventAspect#process(org.apache.cocoon.portal.event.aspect.EventAspectContext, org.apache.cocoon.portal.PortalService)
*/
public void process(EventAspectContext context, PortalService service) {
final Response response = ObjectModelHelper.getResponse( context.getObjectModel() );
response.setHeader("Cache-Control", "no-cache");
response.addHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setHeader("Expires", "Thu, 01 Jan 2000 00:00:00 GMT");
context.invokeNext(service);
}
}