Home > Archive > PERL CGI Beginners > August 2005 > Clearing cookies
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| Denzil Kruse 2005-08-16, 9:59 pm |
| Hi all,
I'm trying to clear a cookie using CGI::Cookies, and
can't seem to do it :(
if ($clear_cookie eq 'yes') {
my %cookies = fetch CGI::Cookie;
print "getting cookie<br>";
if ($cookies{'id'}) {
print "clearing cookie<br>";
$cookies{'id'}->expires('-1s');
print "cleared cookie<br>";
}
}
I'm getting the "cleard cookie" message, but it is
still there.
Denzil
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| |
| Wiggins d'Anconia 2005-08-16, 9:59 pm |
| Denzil Kruse wrote:
> Hi all,
>
> I'm trying to clear a cookie using CGI::Cookies, and
> can't seem to do it :(
>
> if ($clear_cookie eq 'yes') {
>
> my %cookies = fetch CGI::Cookie;
>
> print "getting cookie<br>";
>
> if ($cookies{'id'}) {
>
> print "clearing cookie<br>";
> $cookies{'id'}->expires('-1s');
> print "cleared cookie<br>";
> }
> }
>
> I'm getting the "cleard cookie" message, but it is
> still there.
>
> Denzil
>
To clear the cookie in the user's client (browser) you have to "set" the
cookie again by printing it in the response headers. You are only
setting the local expiration, to have that maintained across the rest of
the session you have to tell the browser about it, which is done by
passing it back as if you were setting it initially.
HTH,
http://danconia.org
| |
| Denzil Kruse 2005-08-16, 9:59 pm |
|
--- Wiggins d'Anconia <wiggins@danconia.org> wrote:
> Denzil Kruse wrote:
>
<snip>
> To clear the cookie in the user's client (browser)
> you have to "set" the
> cookie again by printing it in the response headers.
> You are only
> setting the local expiration, to have that
> maintained across the rest of
> the session you have to tell the browser about it,
> which is done by
> passing it back as if you were setting it initially.
>
> HTH,
>
> http://danconia.org
>
Okay, that makes sense. Thanks for the help!
Denzil
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| |
| Denzil Kruse 2005-08-17, 4:59 pm |
|
--- DBSMITH@OhioHealth.com wrote:
> can you give a syntax example?
Here is a piece of what I'm doing:
------------------------------------
if ($clear_cookie eq 'yes') {
my %cookies = fetch CGI::Cookie;
if ($cookies{'id'}) {
$cookies{'id'}->expires('-1s');
print "Set-Cookie: $cookies{'id'}\n";
}
}
print "Content-type: text/html\n\n";
--------------------------------------------------
I'm just following the instructions at:
http://perldoc.perl.org/CGI/Cookie.html
This whole cookie thing is new to me. Never wanted to
use them before because they were out of my control,
browsers might block them, or people might not
understand what they are and get all paranoid. Or do
understand and get paranoid :o)
Denzil
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| |
| Denzil Kruse 2005-08-17, 4:59 pm |
| I'm still having a problem clearing the cookie, or at
least with the browser realizing it has been cleared.
What happens is this: The cookie is set, and my
program behaves as it is supposed to. When I decide
to clear it, I do it and display a form which will
recreate the cookie once the form is filled out and
the submit button is pushed.
So it clears the cookie and displays the form. I look
under C:\Documents and Settings\Owner\Cookies on my
local computet running the browser, and I see the
cookie disappear. But when I press the button on the
form once, the browser behaves as if the cookie is
still set. If I then press the button a second time,
it behaves as if the cookie isn't there (correctly).
I do have an apache rewrite rule in effect, maybe that
is causing it to have to do it twice?
Denzil
________________________________________
____________
Start your day with Yahoo! - make it your home page
http://www.yahoo.com/r/hs
| |
| Denzil Kruse 2005-08-17, 4:59 pm |
| Okay, never mind. There was an error elsewhere in my
code.
Denzil
--- Denzil Kruse <denzilphp@yahoo.com> wrote:
> I'm still having a problem clearing the cookie, or
> at
> least with the browser realizing it has been
> cleared.
>
> What happens is this: The cookie is set, and my
> program behaves as it is supposed to. When I decide
> to clear it, I do it and display a form which will
> recreate the cookie once the form is filled out and
> the submit button is pushed.
>
> So it clears the cookie and displays the form. I
> look
> under C:\Documents and Settings\Owner\Cookies on my
> local computet running the browser, and I see the
> cookie disappear. But when I press the button on
> the
> form once, the browser behaves as if the cookie is
> still set. If I then press the button a second
> time,
> it behaves as if the cookie isn't there (correctly).
>
> I do have an apache rewrite rule in effect, maybe
> that
> is causing it to have to do it twice?
>
> Denzil
>
>
>
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