01: /*
02: * Copyright 2007 Outerthought bvba and Schaubroeck nv
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: package org.outerj.daisy.frontend;
17:
18: import org.apache.cocoon.acting.Action;
19: import org.apache.cocoon.environment.*;
20: import org.apache.avalon.framework.thread.ThreadSafe;
21: import org.apache.avalon.framework.parameters.Parameters;
22:
23: import java.util.Map;
24:
25: /**
26: * This actions prevents proxies from caching when there is a session.
27: * At the time of this writing, the Daisy Wiki does not create a session
28: * as long as the user is not logged in (i.e. is the guest user).
29: */
30: public class SetCacheHeaderAction implements Action, ThreadSafe {
31:
32: public Map act(Redirector redirector, SourceResolver resolver,
33: Map objectModel, String source, Parameters parameters)
34: throws Exception {
35: Request request = ObjectModelHelper.getRequest(objectModel);
36:
37: if (request.getSession(false) != null) {
38: Response response = ObjectModelHelper
39: .getResponse(objectModel);
40: response.setHeader("Cache-Control", "private");
41: }
42:
43: return null;
44: }
45: }
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