[mrtg] Re: MRTG & PNG images: browser failing to refresh

[Dan Colquhoun]

However isn't "never," it's MSNever(TM) which means it randomly uses cached
pages and cgi resulty (although not often).  At least this has been my
experience with IE 5.00 128bit over the last few weeks when doing my mrtg
setups...  So if something doesn't look right, try reloading (ctrl-r is the
shortcut) five or six times.  This works more often than not.

> -----Original Message-----
> From: mrtg-bounce at list.ee.ethz.ch
> [mailto:mrtg-bounce at list.ee.ethz.ch]On
> Behalf Of Brady, Jeff
> Sent: Wednesday, October 11, 2000 8:51 AM
> To: 'mrtg at list.ee.ethz.ch'
> Subject: [mrtg] Re: MRTG & PNG images: browser failing to refresh
>
>
>
> I had a similar problem, even if the page was set to expire the local
> browser was caching the images.  On IE you go to Tools,
> Internet Options,
> Temporary Files Settings, click the radio button for "check
> for new versions
> every visit to the page."  With this set IE will never used
> cached info if
> the page can be reached, it will always pull the entire page.
>
> -----Original Message-----
> From: mrtg-bounce at list.ee.ethz.ch
[mailto:mrtg-bounce at list.ee.ethz.ch]On
Behalf Of Rainer Bawidamann
Sent: Wednesday, October 11, 2000 6:19 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: MRTG & PNG images: browser failing to refresh



In article <39E33F82.3637896B at spawar.navy.mil>,
	ganzer at spawar.navy.mil ("Mark T. Ganzer") writes:
>
> While on the subject of GIF vs PNG images, has anyone using MRTG with
> PNG images had problems getting their web browsers to refresh
> automatically (or even manually)?  I am running MRTG 2.8.11 on a Sun
> Enterprise Server and Netscape Enterprise web server. The index pages
> and interface display just fine, however after that they will not
> update. About the only way I can force a refresh is to clear the browser
> cache, then reload the pages. Kind of a pain...

Do you use only mrtg or in combination with 14all (UseRRDTool: yes)?

If you use only mrtg the html pages should have "Refresh" and "Expires"
headers. If you enable "WriteExpires: 1" you will get "meta" files for
your graph files (i.e. for a file "x-daily.png" you will get a
"x-daily.png.meta"). You have to tell your web server to use these files
(apache: MetaFiles: on).

Rainer
--
Rainer.Bawidamann at rz.uni-ulm.de

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