[Zope] Browser Sticky Fingers

[Martijn Pieters]

At 16:49 19/10/99 , Jeff Rush wrote:
>Hmmm, I'm staring at web sites that -do- update their graphic
>content, such as weather display sites and the MRTG (network
>graph stats) program, and I don't see anything like a variable URL.
>
>How do they manage it?  The only new item I see is the use of:
>
><META HTTP-EQUIV="Refresh" CONTENT=300>
><META HTTP-EQUIV="Expires" CONTENT="...a date">
>
>While this would cause the HTML to refreshed periodically,
>how are they getting the browser to re-fetch the *images*?
>I've captured the HTML source for several iterations and the
><IMG SRC="blah"...> part never changes, so I would expect
>the same graphic would keep appearing on each cycle.

What kind of URL is pointing to the image? What headers are returned when 
retrieving the image?

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Martijn Pieters, Web Developer
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