[cgiapp] cgi::application::plugin::session question

[Sean Davis <suppressed>]

This is a VERY basic question regarding sessions with CGI.  I have some 
code below that I would expect to look for a cgi::cookie with a session 
ID from a previous visit.  If the cookie exists, use the session ID 
from the cookie, otherwise the session ID is undefined and C::A::P::S 
makes a new session.  However, it seems that I get a new session with 
each visit to the page (my first runmode does contain a call to 
$self->session, which I understand will generate the cookie).  I am 
missing some important concept here, but just can't figure out what.  
Can someone enlighten me a bit?

sub setup {
  my $self=shift;
  $self->start_mode('query_text');
  $self->mode_param('rm');
  $self->run_modes(
    'query_text'     => 'text_query',
#    'query_location' => 'text_query',
#    'query_GO'       => 'text_query',
#    'query_exprs'    => 'text_query',
    'return_results' => 'return_results',
    'do_heatmap'     => 'do_heatmap',
    'mode4'          => 'return_graphical_results',
		  );

  $self->param('dbh' => DBI->connect($dsnnlt,
				     $nltuser,
				     $nltpass
				    ))
    or croak "Database connection not made: $DBI::errstr";
  my $sid = $self->query->cookie("CGISESSID") || undef;
  $self->session_config(
    CGI_SESSION_OPTIONS => ['driver:MySQL',$sid,
			    {Handle=>$self->param('dbh')}],
    COOKIE_PARAMS       => {
      -domain  => 'nih.gov',
      -expires => '+12h',
      -path    => '/',
			   },
    SEND_COOKIE         => 1,
		       );


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