[plt-scheme] Browser caching servlet generated pages

On Sun, 2003-11-02 at 21:28, Noel Welsh wrote:
> Hi all,
> 
> I'm having a problem with web browser caching of
> servlet generated pages.  My servlets generate pages
> using the 
> 
>   (list "text/html"
>         (blah ...))
> 
> return type.  These pages get cached by the browser. 
> As the pages change frequently the cached version is
> often out-of-date which causes lots of problems.  I
> see this caching problem on both IE 5 and Netscape 4.7
> on Win 98 (oh the shame! can I ever show my face at a
> CS conference again?)  The full set of HTTP headers
> returned by one of the servlets is:
> 
>   "HTTP/1.1 200 Okay\r\nDate: Mon, 03 Nov 2003
> 01:38:32 GMT\r\nLast-Modified: Mon, 03 Nov 2003
> 01:38:32 GMT\r\nServer: PLT Scheme\r\nContent-type:
> text/html\r\nConnection: close\r\nContent-length:
> 1420\r\n\r\n"
> 
> Is there some header that I could return to prevent
> caching?  Alternatively are there other techniques
> people are familiar with?

Who's caching your pages?  Your browser or web-server?