Re: how to clear cgi object from session?

hmm seems to have lost my own reply. Yes, well i'm using CGI::Session, and I wanted to know whether there was a way to clean up my saved cgi object (CGI.pm). Could it be $session->clear($cgi)? let's take another sample:

main.pl :

 my $cgi = New CGI;
 my $session = new CGI::Session();

 $cgi->param("name", "Barney");

 $session->save_param($cgi); #saves cgi object into session
 $cgi->redirect(URI => "body.pl?sessionid=".$session->id);
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then on body.pl :


 my $cgi = New CGI;
 my $sessionid = $cgi->param("sessionid");
 my $session = new CGI::Session($sessionid);

 $session->load_param($cgi);
 $cgi->param("name"); #we still have barney around.

 $session->clear($cgi); #ASSUMPTION - CLEAN UP CGI

 $cgi->redirect(URI => "car.pl?sessionid=".$session->id);
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Then on car.pl :


 my $cgi = New CGI;
 my $sessionid = $cgi->param("sessionid");
 my $session = new CGI::Session($sessionid);

 $session->load_param($cgi);
 print $cgi->param("name"); #should not have anything anymore
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Re^2: how to clear cgi object from session? by almut (Canon) on Sep 14, 2007 at 13:04 UTC
It should just work if you call `$session->clear()` (without passing the `$cgi` object). As I already said, this would clear all parameters, though. In case you have other stuff stored in the session which you don't want to have cleared, you could do `$session->clear([$cgi->param()])` instead, which would clear nothing but the parameters of the current CGI object. BTW, `save_param($cgi)` does not store the CGI object itself. It calls the `param()` method on the object passed in. This method, when called without an argument, returns a list of all parameters, which are then stored in the session. (In theory, the API of CGI::Session could likewise accept `clear($cgi)`, to then call `param()` on the CGI object, etc... — but that's not how it's implemented.) HTH.	[reply] [d/l] [select]

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Re^2: how to clear cgi object from session?
by almut (Canon) on Sep 14, 2007 at 13:04 UTC

It should just work if you call $session->clear() (without passing the $cgi object). As I already said, this would clear all parameters, though. In case you have other stuff stored in the session which you don't want to have cleared, you could do $session->clear([$cgi->param()]) instead, which would clear nothing but the parameters of the current CGI object.

BTW, save_param($cgi) does not store the CGI object itself. It calls the param() method on the object passed in. This method, when called without an argument, returns a list of all parameters, which are then stored in the session. (In theory, the API of CGI::Session could likewise accept clear($cgi), to then call param() on the CGI object, etc... — but that's not how it's implemented.) HTH.

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