Cool trick Igor, I didn't think of this before.
On 2/28/06, Igor Vaynberg <[EMAIL PROTECTED]> wrote:
> the trick is to append a random number as a query parameter. that way the
> browser has to fetch it again because it thinks its a different document.
>
> -Igor
>
>
> On 2/28/06, Martijn Dashorst <[EMAIL PROTECTED]> wrote:
> > Set the headers on the response.
> >
> > The browser support is a bit flaky as I understand it, from the numerous
> caching problems with pages across browsers (safari, IE and FF work
> differently).
> >
> > Martijn
> >
> >
> >
> >
> > On 2/28/06, Anders Peterson <[EMAIL PROTECTED] > wrote:
> > > Hi,
> > >
> > > On one page I'm displaying dynamic charts (JFreeChart) as images. The
> > > charts, the data they're based on, are constantly changed by the users.
> > >
> > > The problem (as I understand it): The web browser doesn't know that the
> > > image has changed and therefore (sometimes) uses a cached image. Which
> > > means incorrect data is displayed.
> > >
> > > How can I make sure the browser always asks for a fresh image?
> > >
> > > /Anders
> > >
> > >
> > > Image tmpImage2 = new Image("image2", new SpclChartResource() {
> > >
> > > public AbstractChartFactory getFactory() {
> > >
> > > this.setHeight(300);
> > > this.setWidth(600);
> > >
> > > DefaultCategoryDatasetFactory retVal = new
> DefaultCategoryDatasetFactory();
> > > retVal.setLegend(true);
> > >
> retVal.setType(AbstractChartFactory.TYPE_BarChart);
> > > ...
> > > --
> > > http://ojalgo.org/
> > >
> > > Mathematics, Linear Algebra and Optimisation with Java
> > >
> > >
> > >
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> >
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>
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