April 2020 - 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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background task queue
by Hermann Calabria 23 Apr '20

23 Apr '20

Hi all, Does anyone have any suggestions and/or best practices for how to implement a background task queue (i.e. something similar to Python’s www.celeryproject.org) that works well with Dancer and/or for Perl in general? Some of the options I’m currently exploring: https://beanstalkd.github.io/ https://mojolicious.org/perldoc/Minion http://gearman.org Thanks! Hermann

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Dancer2 0.300003 released
by Jason Crome 09 Apr '20

09 Apr '20

Dancer2 0.300003 is on its way to a CPAN mirror near you, cleaning up some documentation and tutorial issues. Jason A. Crome / CromeDome CPAN: https://metacpan.org/author/CROMEDOME github: https://github.com/cromedome Twitter: https://twitter.com/cromedome

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Client IP addr from behind a proxy
by Mike Diehl 09 Apr '20

09 Apr '20

Hi all, Fairly new user here... I've got a server that sits on our LAN behind a SonicWall firewall. Our Dancer2 application is running on port 8080 and is being reverse proxied by Apache. Yuck, I know. So, I'd like to get the actual client's IP address for logging purposes. To test that, I've got these lines in my program: session->write("CLIENT_IP", request->remote_address); session->write("FORWARD_IP", request->header('x-forwarded-for')); session->write("REAL_IP", request->header('x-real-ip')); These tests were based on a few Google searches. What I find in my session is: (sanitized) CLIENT_IP: 127.0.0.1 FORWARD_IP: 98.101.x.y REAL_IP: ~ However, my address is 10.2.1.219. The 98.101.x.y address is our outward facing IP address on the SonicWall. The Apache config resembles: <Location "/Apps/"> ProxyPass "http://127.0.0.1:8080/Apps/" </Location> So, is what I'm wanting to do even possible in this configuration? If so, how? Thanks in advance, -- Mike Diehl

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Dancer2 0.300002 released
by Jason Crome 07 Apr '20

07 Apr '20

Hot on the heels of our last Dancer2 release, Dancer2 0.300002 is on its way to CPAN, fixing a broken test causing issues in CI. Happy Dancing! 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 0.300001 Released
by Jason Crome 06 Apr '20

06 Apr '20

On behalf of the Dancer Core Team, I’d like to announce the availability of Dancer2 0.300001. This maintenance release brings brings a revamped tutorial, fixing of a YAML-related regression, repair of an encoding bug, and a slew of documentation fixes. The full changelog is as follows: 0.300001 2020-04-06 12:14:47-04:00 America/New_York [ BUG FIXES ] * GH #1461: Relax redirect to match RFC_7231 (James Raspass) * GH #1499: Don't double decode date strings (simbabque) * GH #1536: Fix storing objects in YAML sessions (Tom Hukins) [ ENHANCEMENTS ] * GH #1540: Improve configuration handling (Tom Hukins) [ DOCUMENTATION ] * GH #1425: Revamped Tutorial (Steve Dondley) * GH #1521: Documentation on configuring the adress to listen on: "server" does not seem to work, but "host" does (Ma_Sys.ma) * GH #1530: Fix missing space in docs (ferki) * GH #1535: Fix example code in SessionFactory::File (Sergiy Borodych) * GH #1538: Defined or should not be an assignment (Timothy Alexis Vass) Personally, I’d like to thank SysPete for spending a lot of time helping me to prepare for this release, and to my employer Clearbuilt for giving me some spare cycles at work to get this out the door. The Dancer Core Team hopes that you are all staying safe in these difficult times. Wash your hands, maintain a safe distance from others, and keep on dancing! Jason A. Crome / CromeDome CPAN: https://metacpan.org/author/CROMEDOME github: https://github.com/cromedome Twitter: https://twitter.com/cromedome

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