[Fwd: Re: Avoid JSP caching by the browser]

[Rob Leland <Ro...@freetocreate.org>]

Use the Action.saveToken(), Action.resetToken(),
Action.isTokenValid()  for
form transactions. This does exactly what you want.

see

http://www.mail-archive.com/struts-user@jakarta.apache.org/msg02888.html


for the thread that discusses this.



Lind Jürgen wrote:
> 
> Hi there,
> 
> I have the following problem: in order to prevent the web-browser
> from using cached versions of a jsp, we plan to add some unique
> timestamp (which will actually be ignored by the jsp) to the url
> that calls the jsp, e.g.:
> 
> <a href="/jsp/view.jsp?ts=<%= System.currentTimeMillis()%>">myjsp</a>
> 
> While this works fine when cookies are enabled, it fails when
> cookies are disabled because it does not make use of the URL
> rewriting capabilities of the Struts taglib.
> 
> Using the html:link tag, however, introduces the difficulty how to
> dynamically add the timestamp. Using something like
> 
> <html:link href="/jsp/view.jsp?ts=<%=
> System.currentTimeMillis()%>">myjsp</html:link>
> 
> fails as the Java Code will not get interpreted but it will be literally
> appended  to the URL, causing a Decode Error in the receiving JSP.
> 
> Has anyone experienced similar problems (with the web browser caching
> jsp pages) and could offer some help or are there any suggestions wrt.
> the above evaluation problem?
> 
> Regards
> 
> Jürgen
> 
> --
> Dr. Jürgen Lind
> iteratec GmbH                Fon: +49 (0)89 614551-44
> Inselkammerstrasse 4         Fax: +49 (0)89 614551-10
> 82008 Unterhaching           Web: www.iteratec.de