Catalyst response->redirect and login trick

say, u have a "return $c->res->redirect('/login') unless ($c->user_exists);" in one sub(means one url like "/forum/1/topic/new"). and u tried to get "/forum/1/topic/new" as $c->req->referer; but Catalyst is somehow different, u don't get "/forum/1/topic/new" as your HTTP_REFERER. Catalyst treats $c->res->redirect inside.

mm, maybe you will get this problem when you code in Catalyst.
Here comes my solution:
Root.pm

sub end : Private {
   my ( $self, $c ) = @_;
  
   # for login using!
   if ($c->res->location and $c->res->location eq '/login') {
       $c->res->location('/login?referer=/' . $c->req->path);
   }
return if ($c->res->body || $c->res->redirect);

Logon.pm after $c->login OK, use

# redirect
my $referer = $c->req->param('referer');
if ($referer) {
   $c->res->redirect($referer);
} else {
   $c->res->redirect('/');
}

and in Template: try to put "<input type='hidden' name='referer' value='[% c.req.param('referer') %]' />" in your action='/login' form.

OK, maybe I forget the '$c->req->uri->query' or '$c->req->body_parameters', but you can improve it, right?

Have fun!