Doug is *dead* on. The random/date number is really a kludge.
Do keep in mind too that META tags and PRAGMA and other tag based
headers are entirely unreliable. They are ignored by proxies, some
browser versions, etc.
Here is the setting we do in our JSP/servlet which is known good for
all browsers we have seen connect to our applications to date.
response.setHeader("Cache-Control", "max-age=0, must-revalidate");
You should be cautious too because some browsers are *weird* about
cache-control headers over SSL with binary data and pretty much just
lose their minds rendering corrupted SWFs.
The above works, is simple, proper and standard.
Enjoy!!
--
Dave Wolf
Cynergy Systems, Inc.
Macromedia Flex Alliance Partner
http://www.cynergysystems.com
Email: [EMAIL PROTECTED]
Office: 866-CYNERGY
--- In [email protected], "Doug Lowder" <[EMAIL PROTECTED]> wrote:
>
> Well, that fixes the problem for a single client, but what about
> other clients? Like Dave pointed out, the real fix for this is at
> the server by setting the proper HTTP headers:
>
> <META HTTP-EQUIV="Cache-Control" CONTENT ="no-cache">
> <META HTTP-EQUIV="expires" CONTENT="0">
>
> Or from a JSP page, try the following before writing anything to the
> output stream:
>
> response.setHeader("Cache-Control","no-cache");
> response.setDateHeader ("Expires", 0);
>
>
> --- In [email protected], sinatosk <sinatosk@> wrote:
> >
> > yeah thats what I do but I use this method instead
> >
> > var d:Date = new Date();
> >
> > url += "?" + d.getTime().toString();
> >
> > that way I know for sure the number will always be different :p
> >
> > and it is the flash player that caches it ( only if you use the
> flash player
> > alone otherwise yes it does use your browser ). if you run the SWF
> file on
> > it's own ( using flash player but not within a browser ) it
> remembers it.
> >
> > My guess is that the flash player remembers the URL and the
> contents it
> > recieved.
> >
> >
> > On 4/14/06, JesterXL <jesterxl@> wrote:
> > >
> > > Via code you can append a random number to the URL. Since it's
> generally
> > > unique each time, it almost never reads from the cache. I
> reckon if you
> > > build your URL dynamically for HTTPService, you can ensure it'll
> never be
> > > cached.
> > >
> > > var url : String = "http://www.server.com/file.php";;
> > > url += "?" + String ( Math.random() * 9999) ;
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Dave Wolf" <gatorj24@>
> > > To: <[email protected]>
> > > Sent: Thursday, April 13, 2006 7:58 PM
> > > Subject: [flexcoders] Re: [Flex2.0] How can I control cache of
> HTTPService
> > >
> > > inside FlashPlayer?
> > >
> > >
> > > Set the proper cache control headers on the server side. The
> player
> > > is not caching this, the browser is. The player piggy backs on
> the
> > > browsers HTTP stack generally.
> > >
> > > --
> > > Dave Wolf
> > > Cynergy Systems, Inc.
> > > Macromedia Flex Alliance Partner
> > > http://www.cynergysystems.com
> > >
> > > Email: dave.wolf@
> > > Office: 866-CYNERGY
> > >
> > >
> > > --- In [email protected], "sn197412" <shigeru_nakagaki@>
> > > wrote:
> > > >
> > > > Hi.
> > > >
> > > > I have a question.
> > > > How can I control cache of HTTPService inside FlashPlayer?
> > > >
> > > > I get XML file that is always different contents each request.
> > > > But HTTPService show content that was got at first access.
> > > >
> > > > How should I?
> > > >
> > > > --Shigeru
> > > >
> > > > http://Shigeru-Nakagaki.com <http://shigeru-nakagaki.com/>
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --
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> > >
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