Image Cache

[Brent Fraser]

Steve's just kidding (you gotta love that Unix humor).
I'll be putting it thru the NT blender as soon as he
releases the source....

As for the caching problem, I noticed that back in
May, and after much investigation (see attached
email thread) we came up with the solution of adding
a timestamp value to the file names.  Hopefully,
Steve will have that option in the soon-to-be-released
version...

Brent

----- Original Message -----
From: KIERAN AMES <kames at keyspanenergy.com>
To: <mapserver-users at lists.gis.umn.edu>
Sent: Thursday, November 04, 1999 12:29 PM
Subject: Re: Image Cache


> I've waited for more than a year to be able to do the things I've done in
> just the past few days! By all means, "Carry on!" .
> (I just worry about the "assuming it'll compile on NT" part of your reply.
> Brent has been great help. Dare I ask for more???)
>
>     <PETRIFIED>
>         shiver, shiver; worry, worry. Then, what'll I do??
>     </PETRIFIED>
>
> Kieran
>
> Stephen Lime wrote:
>
> > You could hack mapserv.c and have it spit out
> > the tag you mention. Another way would be to
> > come up with a more unique naming convention.
> > Version 3.3 now uses time + pid for what should
> > be a truly unique name. If you can hold out for a
> > few more days your problem should be solved,
> > assuming it'll compile on NT. ;-)
> >
> > Steve
> >
> > <<< "KIERAN AMES" <kames at keyspanenergy.com> 11/ 4  1:04p >>>
> > I've installed a port of Mapserv onto a NT4.0 machine and am now
> > experimenting. I've run across an implementation problem with regard to
> > images being cached.
> >
> > I believe that image names are created with the map name concatenated to
> > the processID. In NT, process IDs don't run very high and are re-used.
> > Therefore, when a new image is created, the client browser sees an image
> > name and if it finds it in its local cache, it doesn't fetch the revised
> > image that was just created.
> >
> > I can control this in regular cgi (Perl) by sending non-parsed headers
> > and delivering a "Pragma:No-cache" line in the http headers. Is there an
> > equivalent solution with MapServ on an NT platform?
> >
> > Thanks very much.
> > Kieran Ames
> >
> > PS. I'm new to MapServ, but I think its GREAT!
>
>
-------------- next part --------------
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From: "Stephen Lime" <steve.lime at dnr.state.mn.us>
Subject: Re: caching at browser
Date: Tue, 18 May 1999 10:06:04 -0500
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URL: <http://lists.osgeo.org/pipermail/mapserver-users/attachments/19991104/2eb6eb13/attachment.eml>