November 2018 - 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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Is there an plugin that exists that uses autopage?
by Steve Dondley 23 Nov '18

23 Nov '18

I'm not having any success getting the autopage feature working with a plugin following the instructions in Dancer2::Manual. And placing a "register" method into my plugin causes a "Subrouting register redefined" warning. Wondering if there is a plugin out there that uses autopage so I can see how to properly implement it. Thanks. -- Prometheus Labor Communications, Inc. http://prometheuslabor.com 413-572-1300 UnionConnect Phone App for Labor Unions http://unionconnect.com

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Injecting templates
by Zahir Lalani 21 Nov '18

21 Nov '18

Hi All Need some guidance as to the options available I currently have a module which renders a template as a whole page. I want to separate some stuff as its getting a little messy This module is called by a parent controller. I want the parent controller to effectively call a master template render, and into that template I want to inject the content generated by the above sub module. So to be clear: Current: Parent_controller Call sub_module Return template abc New Parent Controller $Inject = sub_module ; (renders a tt) Template xyz { parent_info = $x, inject_info = $inject } The parent template would simply then have a variable where the $inject output is replaced "template" is designed to render the whole page using layout - I am looking for something similar to the process template control of template toolkit. Hope I made myself clear Z

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Unit testing plugins
by Steve Dondley 19 Nov '18

19 Nov '18

Ive been messing around with figuring out how to unit test plugins. I came up with something that works but that is very messy and hacky and so it feels like I'm way off the beaten path. Can someone set me straight on whether there is an easier way to peek into the inner data structures of a plugin? Here's what I came up with to dump the contents of my plugin's "html_cache" attribute: my $app = Dancer2::Core::App->new(); $app->with_plugins('Menu'); $app->plugins->[0]->menu_item( { title => 'blah' }, $app->add_route( method => 'get', regexp => '/test', code => sub { $app->template('index.tt', shift) } )); my $req = Dancer2::Core::Request->new( env => { SERVER_NAME => 'localhost', SERVER_PORT => 8000, } ); my $route = $app->routes->{get}->[0]; $req->{route} = $route; $req->{cookies} = { }; $app->{request} = $req; $route->execute($app); print Dumper $app->plugins->[0]->html_cache; Thanks! -- Prometheus Labor Communications, Inc. http://prometheuslabor.com 413-572-1300 UnionConnect Phone App for Labor Unions http://unionconnect.com

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New Dancer2::Plugin::Menu module
by Steve Dondley 13 Nov '18

13 Nov '18

Quick announcement for a new module I wrote for automatically generating a simple HTML menu for a Dancer2 app. CPAN: https://metacpan.org/pod/release/STEVIED/Dancer2-Plugin-Menu-0.002/lib/Danc… GitHub: https://github.com/sdondley/Dancer2-Plugin-Menu Feedback and suggestions welcomed and appreciated. Thanks. -- Prometheus Labor Communications, Inc. http://prometheuslabor.com 413-572-1300 UnionConnect Phone App for Labor Unions http://unionconnect.com

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How do you test the internal methods of a plugin?
by Steve Dondley 10 Nov '18

10 Nov '18

I'm trying to test the internal methods of a plugin in the context of a running test app. The following doesn't work but should give you an idea of what I want to accomplish: use Plack::Test; use HTTP::Request::Common; { package TestApp; use Dancer2; use Dancer2::Plugin::Menu; get '/' => sub { return template 'index' }; get '/test' => sub { template 'index.tt', { html => 'hi', }, }; build_menu; } my $test = Plack::Test->create( TestApp->to_app ); my $res; my $menu = Dancer2::Plugin::Menu->new(app => $test); # test the return value of plugin method my $result = $menu->_convert_routes_to_array; cmp_deeply($result, [ '/', '/test' ], 'returns array of menu paths'); Is there a way to do this? -- Prometheus Labor Communications, Inc. http://prometheuslabor.com 413-572-1300 UnionConnect Phone App for Labor Unions http://unionconnect.com

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New module for converting markdown files to HTML
by Steve Dondley 04 Nov '18

04 Nov '18

Hello Fellow Dancers, Just wanted to announce a new module for converting markdown files to HTML. No perl code necessary to use! Just make some entries in your config.yml file and you are done. I think it'll be very useful. For example, you can now just throw your copy into a repo with markdown files and clone it to your local hard drive and you are done ever having to mess with HTML. I has two basic modes of operation right now: convert a single markdown file to all the markdown files in a single directory. It can can also automatically generate a table of contents for the file that links to the headers in the content. I've used it to generate a pretty nifty looking tutorial. You can see it in action here: http://208.199.27.88:5000/dzil_tutorial It's up on CPAN here: https://metacpan.org/pod/Dancer2::Plugin::MarkdownFilesToHTML GitHub repo is here: https://github.com/sdondley/Dancer2-Plugin-MarkdownFilesToHTML I plan on making it have tight integration with GitHub in the near future. I also plan on creating yet another local POD viewer with it as well. I'd appreciate feedback and ideas for further improvements. Thanks! -- Prometheus Labor Communications, Inc. http://prometheuslabor.com 413-572-1300 UnionConnect Phone App for Labor Unions http://unionconnect.com

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