Re: [Dancer-users] Controlling Session expire time

12 Apr 2011

      I see space for a plugin here. Unless I'm overlooking something, you need a
way to temporarily set a configuration option and have it removed at the end
of the request:

# ... in your code
volatile session_expires => '...';  # whatever the business logic dictates

# ... in the plugin, proof of concept
my %original_for;
register volatile => sub {
   my ($name, $value) = @_;
   my $config = config();
   if (! exists $original_for{$name}) {
      $original_for{$name} = exists($config->{$name}) ? [ $config->{$name} ]
: undef;
   }
   set $name, $value;
};

after sub {  # restore original values
   my $config = config();
   while (my ($name, $value) = each %original_for) {
      delete $config->{$name};
      $config->{$name} = $value->[0] if ref $value;
   }
   %original_for = ();
};

Of course the restoration mechanism above somewhat breaks encapsulation for
config/set/setting. Could we possibly use only Dancer::Config::setting? The
tricky part is handling the "no previous value for this configuration" case.

And of course this does not play well with threads (but I wonder if Dancer
plays nice with them at all).

Cheers,

    Flavio.

On Tue, Mar 15, 2011 at 12:34 AM, Brian E. Lozier <brian@massassi.com>wrote:
...
Hmm, I dug into the actual code and found this in
Dancer::Session::Abstract:
if (my $expires = setting('session_expires')) {
       $cookie{expires} =
         Dancer::Cookie::_epoch_to_gmtstring(time + $expires);
   }
It appears I can have a global timeout option in the settings.  This
is useful although I think I need something a bit more flexible.  I
need to be able to choose a session time out based on user input.  For
example, if they check "remember me" I want the session to expire in 2
weeks, otherwise just use a session cookie.
The write_session_id method is specifically mentioned as something I
should not attempt to overload.  Does anyone have any ideas about how
I can have a dynamic session timeout?
Thanks again,
Brian
On Mon, Mar 14, 2011 at 4:27 PM, Brian E. Lozier <brian@massassi.com>
wrote:
...
When I use Dancer::Session::YAML to create a session, the session
cookie is set to expire when the browser closes.  Is there a way for
me to set an expire time for the session cookie?  I looked in
Dancer::Session, Dancer::Session::YAML, Dancer::Cookbook, and
Dancer::Session::Abstract but didn't see anything (maybe I missed it).
Thanks,
Brian
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Re: [Dancer-users] Controlling Session expire time

Flavio Poletti