[users@httpd] Error logs showing status 304 for images. Why?

[Gerard Isdell <ge...@kinetic.co.uk>]

Hi there.

Some visitors to my website are complaining that sometimes they can't see 
images on the site.  I've looked in the error logs and found lots of GETs of 
images with a status code of 304 e.g. 
 
80.41.236.203 - - [27/May/2004:21:20:24 +0000] "GET  
/members/photos/alexpic3.jpg HTTP/1.1" 304 - "Mozilla/4.0 (compatible;
 MSIE 6.0; Windows 98; generic_01_01)" 
 
As far as I can make out, this is an issue in which the server responds with 
the 304 code, essentially saying the image hasn't been modified, and telling 
the browser to use the version in it's cache.

I've asked users to clear their browser cache and its hasn't helped.

I've added the following to my html pages but am not sure if this wil be 
applied to the images on the page as well.

<META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE, must-revalidate">
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1"> 

Does anyone know what I can do to fx this?

Many thanks.
Gerard


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Re: [users@httpd] Error logs showing status 304 for images. Why?

[Joshua Slive <jo...@slive.ca>]

On Tue, 1 Jun 2004, Gerard Isdell wrote:
> Some visitors to my website are complaining that sometimes they can't see
> images on the site.  I've looked in the error logs and found lots of GETs of
> images with a status code of 304 e.g.
>
> 80.41.236.203 - - [27/May/2004:21:20:24 +0000] "GET
> /members/photos/alexpic3.jpg HTTP/1.1" 304 - "Mozilla/4.0 (compatible;
> MSIE 6.0; Windows 98; generic_01_01)"
>
> As far as I can make out, this is an issue in which the server responds with
> the 304 code, essentially saying the image hasn't been modified, and telling
> the browser to use the version in it's cache.

The 304 status code is perfectly normal, so you need to look a little 
deeper.  What exact problem are you seeing?  Have you examined exactly the 
headers that are being sent in the HTTP request and response?  If you 
"touch" the file (to make the server think it changed) can the client get 
the image?

Joshua.

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