CGI and browser cahce

08-06-2003

Hi,

I've a problem: I don't want the browser to cache websites, because I
wrote a shop with authentification and after having logged out, it is
possible to see the old sites using the back button of the browser. I
tried the following (my header.cgi-file), but it does not work:

print "Content-type: text/html\n\n";
print <<EOF;
<html>
<head>
<META http-equiv="Cache-Control" content="no-cache">
<META http-equiv="Pragma" content="no-cache">
<META http-equiv="Expires" content="-1">
<link rel="stylesheet" type="text/css" href="/css/main.css">
</head>
<body>
<table width="78%" border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="78%" align="left">
EOF

Any ideas?

Thank you,

Sascha

08-06-2003

"Sascha Möllering" <> wrote in message
news:bgqpkv$mkv$04$...
> Hi,
>
> I've a problem: I don't want the browser to cache websites, because I
> wrote a shop with authentification and after having logged out, it is
> possible to see the old sites using the back button of the browser. I
> tried the following (my header.cgi-file), but it does not work:

Your Perl question is answered in
http://www.htmlgoodies.com/beyond/nocache.html

gtoomey

08-06-2003

On Wed, Aug 6, Gregory Toomey inscribed on the eternal scroll:

> > wrote a shop with authentification and after having logged out, it is
> > possible to see the old sites using the back button of the browser. I
> > tried the following (my header.cgi-file), but it does not work:
>
> Your Perl question

I didn't see a Perl question - did you, or was that sarcasm?

> is answered in
> http://www.htmlgoodies.com/beyond/nocache.html

I'm not sure whether you're deliberately punishing the questioner by
citing a sub-quality answer to the off-topic question, but as soon as
I saw the page recommending to write syntactically invalid HTML in
order to compensate for bug(s) in a certain browser-like operating
system component, I left.

08-06-2003

On Wed, Aug 6, Sascha Möllering inscribed on the eternal scroll:

> I've a problem:

You have several! I think I'm going to start reading
de.comp.lang.perl.cgi _before_ considering to answer any question seen
here. Has it suddenly become infectious to post the same question
(modulo the language) separately to both, without mentioning the fact?
I am by no means the only person around here who reads German! At
least it was vaguely on-topic there, which it really isn't here.

good luck.

08-06-2003

Sascha Möllering wrote:
> I've a problem: I don't want the browser to cache websites, because I
> wrote a shop with authentification and after having logged out, it is
> possible to see the old sites using the back button of the browser. I
> tried the following (my header.cgi-file), but it does not work:
>
> print "[print text snipped]";
> print <<EOF;
[print text snipped]
> EOF

On a first glimpse your Perl code looks fine (well, it's hardly possible to
mess up two simple print statements anyway). You need to provide more
details:
- What do you expect Perl to print
- What does Perl actually print on your computer
Without this information we cannot know why the Perl code does not do what
you expect it to do.

jue

08-06-2003

Sascha Möllering <> wrote in news:bgqpkv$mkv$04$-
online.com:

> Hi,
>
> I've a problem:

Your main problem is asking a question that has nothing to do with Perl. You
should try comp.infosystems.www.authoring.cgi.

By the way, there is also something called google, in case you have never
heard of it. http://www.mnot.net/cache_docs/#CONTROL might be helpful.

--
A. Sinan Unur

Remove dashes for address
Spam bait: private.php?do=newpm&u=

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