Subject:
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Re: Forced refresh of html pages instead of getting them from browser cache
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Newsgroups:
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lugnet.publish, lugnet.off-topic.geek
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Date:
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Wed, 9 Aug 2000 20:30:17 GMT
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Viewed:
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593 times
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In lugnet.publish, Matthew Miller writes:
> Todd Lehman <lehman@javanet.com> wrote:
> > IIRC, there is a pragma no-cache that you can add to the HTTP headers.
>
> Some browsers (I don't remember which ones, sorry) don't respect this. It's
> best to combine this with the expires header, I think. :(
Here's what I do to guarantee no caching:
void printCGIheader(){
printf("Content-type: text/html\n");
printf("Expires: 0\n");
printf("Cache-control: no-cache\n");
printf("Pragma: no-cache\n");
printf("\n");
}
void printCookieHeader(char *token) {
printf("Content-type: text/html\n");
printf("Expires: 0\n");
printf("Cache-control: no-cache\n");
printf("Pragma: no-cache\n");
printf("Set-cookie: token=%s\n",token);
printf("\n");
}
I basically threw in everything and the kitchen sink.
This should work for both HTTP 1.0 and 1.1 and those pesky proxy caches.
(although @home's proxy server kills the cookies for some reason, but
there is no need to use @home's proxy servers). Squid proxy server
passes the cookies just fine and does not cache anything.
KL
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