December 2019 - dancer-users - lists.preshweb.co.uk

Debugging sessions
by Nikola Mitev 29 Jun '23

29 Jun '23

Hi all, I have an annoyingly intermittent problem where on successful authentication the session info disappears and the user is endlessly redirected to the login page. It happens about once a month on a site with 10-20 logins daily. Once it happens to a user, it keeps happening for that user only. A restart of the app usually fixes the issue, and I am yet to see someone who had this problem to report it again at a later stage. Had about 10 cases so far in total. The cookie is generated on accessing the login page, stored in the browser and sent with the login POST request so I can verify cookies are enabled. The user is then authenticated, data added to the session including an 'authenticated' flag and they are redirected to their dashboard. Right before the redirection the session data is present. They make a request for the dashboard following the redirect, this triggers a session authenticated check which fails as no data is available for the session. They are then redirected for authentication and so on in a loop. If I restart the app the issue vanishes. hook before => sub { # <snip> if (!session('authenticated')) { forward '/login'; } } post '/login' => sub { # user authentication and session storage here, then the debug code and the redirecton: my $authenticated = session('authenticated'); $log->info("User authenticated ($authenticated), redirecting to $target_route"); return redirect $target_route; }; I don't have an explicit check on cookie size - not sure how to check it doesn't exceed 4K - but find it unlikely this is the issue. If that was the problem it should be happening persistently for a user regardless of restarts etc? Hope all this makes sense, I am looking for general advice on how to troubleshoot this but any ideas at all will be very much appreciated. Nik

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Dancer2 0.300000 Released
by Jason Crome 24 Dec '19

24 Dec '19

The Dancer Core Team has one more holiday treat in store for you: Dancer2 0.300000 is headed to CPAN, and it's a good one: Dancer now offers typed route parameters! To be clear, all of the existing route syntax is unaffected. You don't have to use types, and typed parameters might not be good for all situations. There is a lot to be gained from having them though, and we're excited to bring them to you! Using them in your own code is simple: get '/thing/:id[Int]' => sub {}; # if not Int then perhaps a Num... get '/thing/:id[Num]' => sub {}; The default type checking library is Type::Tiny, but you can also specify your own type checking library too. See the manual for more information. A big thanks to SysPete for making this long-standing request a reality. I'd also like to apologize to Tom Hukins. I erroneously listed a PR of his in the last release that didn't seem to make it in. I believe that I have made things better in this release. Happy holidays from your friends at Dancer! See you in 2020. Jason A. Crome / CromeDome CPAN: https://metacpan.org/author/CROMEDOME github: https://github.com/cromedome Twitter: https://twitter.com/cromedome

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Dancer2 0.208002 Released
by Jason A. Crome 14 Dec '19

14 Dec '19

Your gift is arriving just a bit early this year: a new Dancer2 just in time for the holidays! There are a number of documentation fixes and enhancements in this version. The largest change you will see under the hood removes Return::MultiLevel (and therefore Scope::Upper) from the list of Dancer2 dependencies, and makes your favorite lightweight web application framework just a little bit lighter. The full changelog follows: 0.208002 2019-12-14 16:08:46-05:00 America/New_York [ BUG FIXES ] * GH#1527: Update travis dist to 'trusty' (Sergiy Borodych) [ ENHANCEMENTS ] * GH #1525: Remove use of Return::MultiLevel, and implement stack frame jumping manually (Graham Knop) [ DOCUMENTATION ] * GH #1505: Fix Flaskr link (Mohammad S Anwar) * GH #1506, 1520: Explain what add_route() does with args (Tom Hukins) * GH #1519: Fix Template Toolkit config docs (Tom Hukins) * GH #1522: Fix itetare typo (Stefan Hornburg - Racke) * GH #1523: Fix typo in Template Toolkit documentation (Mike Katasonov) * GH #1524: Fix error in configuration documentation (Tom Hukins) * GH #1526: Mention that TT2 config start_tag/end_tag need escaping (Chris White) * GH #1528: Note that"Engines" key must be merged in config.yml (Chris White) Barring any show-stopping bugs or security vulnerabilities, this will be the last release of the year. Happy holidays, and we will see you in 2020! Jason A. Crome / CromeDome CPAN: https://metacpan.org/author/CROMEDOME github: https://github.com/cromedome Twitter: https://twitter.com/cromedome

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