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The most important Dancer Plugins
by Gabor Szabo 13 Feb '21

13 Feb '21

Hi, When making improvements to Dancer2 it is important to notice if a plugin breaks and either make the change in a different way or notify the author of the plugin regarding the upcoming breaking change. In order to help with this, in the GitHub Actions configuration I've added the testing of some of the plugins. Specifically: Dancer2::Plugin::Auth::HTTP::Basic::DWIW Dancer2::Plugin::Minion Dancer2::Template::Handlebars Dancer2::Session::Cookie See https://github.com/PerlDancer/Dancer2/blob/master/.github/workflows/ci.yml However I assume these are not the only popular plugins. So I wonder, which other plugins do you use? Gabor

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How to add application-specific config values to config.yml? and the environments/* files?
by Gabor Szabo 09 Feb '21

09 Feb '21

e.g. My applications uses some external system and I'd like to read its URL and the token I need to access it from some config file. I looked at the generated config files, and the only solution I could come up with is to put it under "plugins" like this: plugins: MyApp: url: http://galaxy.com/ token: 42 I don't really like it. What is the recommended way to do it? Gabor

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Help with the dancer2 command
by Gabor Szabo 08 Feb '21

08 Feb '21

I think running the dancer2 command is quite unclear: dancer2 <command> [-?h] [long options...] -? -h --help show help Available commands: commands: list the application's commands help: display a command's help screen gen: create new Dancer2 application But if I run "dancer2 -h" as I think everyone would expect to get more help, I just get back the same thing. Only "dancer2 gen" gives me what I was looking for. What do you think? Gabor

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Perl Dancer live coding
by Gabor Szabo 07 Feb '21

07 Feb '21

Hi, Recently I started to do a lot of live coding and learning while streaming it via Twitch. So far it worked out really well for me as it makes me focus a lot more than when I write on my own. It is also really nice to interact with other people and get their advice even if I don't always follow it. I hear such live sessions are also really good for the people who watch them. It is a great way to learn many things that you can only learn by watching someone else. I am new to this, but I see other programmers with more than 200 people watching while they write code. Today I am going to have such a live steamed session in which I am going to build a small Dancer-based web application to be a front-end to run CI jobs on GitLab. I am going to start at 18:00 UTC but you can join later as well. https://www.twitch.tv/szabgab If you are interested, but cannot make it this time, I'd still invite you to follow me on Twitch and set it up to send you notifications when I start to stream. I plan to steam quit often in the coming weeks. Gabor

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http_throw and Dancer2
by Paul Clements 06 Feb '21

06 Feb '21

I've been trying for a while now to figure out the best way to handle exceptions with Dancer2. I like the simplicity of http_throw. However, I've not been able to get that to work successfully with Dancer2 without this workaround: https://pastebin.com/wLsUBJhN (The test shows a PSGI app with HTTPExceptions enabled, which allows proper use of http_throw. It also shows a sample Dancer2 app with my workaround to allow use of http_throw.) Basically, it appears that Dancer2 wants to intercept any exception and rethrow it as 500 (Internal Server Error) without some hacky hook code to intercept the exception and re-apply it later. Has anyone dealt with this issue? Is there a better way to handle this (some middleware or config option)? Thanks, Paul

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BUG? client disconnect not handled in delayed route
by Paul Clements 03 Feb '21

03 Feb '21

Hi, I've been having trouble getting the server (tried the default PSGI one and Starman) to notice when a client disconnects from a delayed route handler. Long story short, I was able to finally debug this down to the content subroutine in DSL.pm. With the change below, I'm now able to detect and properly handle a disconnect (in my case, I'm just hitting ^C on a client curl session). My question is: Does this seem like a proper fix (should I prepare a PR), or is there a better way to handle this? - Paul --- $ diff -pu git/Dancer2/lib/Dancer2/Core/DSL.pm . --- git/Dancer2/lib/Dancer2/Core/DSL.pm 2020-12-31 11:21:47.490454726 -0500 +++ ./DSL.pm 2021-01-23 11:07:47.464438846 -0500 @@ -328,7 +328,8 @@ sub content { } eval { - $Dancer2::Core::Route::WRITER->write(@_); + my $res = $Dancer2::Core::Route::WRITER->write(@_); + die "Write Error\n" if (!defined($res)); 1; } or do { my $error = $@ || 'Zombie Error';

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Dancer2 0.300005 Released
by Jason A. Crome 29 Jan '21

29 Jan '21

Well, it's been a hot minute since the last release, hasn't it? Dancer2 0.300005 has landed on CPAN and features a number of bug fixes, enhancements, and doc patches: 0.300005 2021-01-26 15:57:41-05:00 America/New_York [ BUG FIXES ] * GH #1546: Add MIME type for all files served from public (Russell @veryrusty Jenkins) * GH #1555: Remove all leftovers of warnings config setting (Sergiy Borodych) * GH #1557: Remove HTTP::XSCookies workaround (Alexander Pankoff) * GH #1564: Add script_name to redirects beginning with / (Nigel Gregoire) * GH #1567: Fix CSS so errors do not display ourside of <pre> HTML element (Elliot Holden) * GH #1568: Serializer::Mutable doesn't auto-load other serializers (Russell @veryrusty Jenkins) * GH #1579: Fix missing push_header method in Response::Delayed (Paul Clements) [ ENHANCEMENTS ] * GH #1552: Update jQuery (Sergiy Borodych) * GH #1558: Test to make sure uploads aren't discarded after the forward keyword is used (Alexander Pankoff) * GH #1571: Add GitHub Actions support (Gabor Szabo) * GH #1572: Install Dancer2::Session::Cookie in order to run the test t/issues/gh-811.t (racke) [ DOCUMENTATION ] * GH #1490: Document Dancer2::Core::App->template() (Steve Dondley) * GH #1551: Fix pod for cookie same site attribute (Sergiy Borodych) * GH #1562: Fix links, missing code in Tutorial (cloveistaken) I have already lined up a number of issues for inclusion into the next release, which should be landing in early February (as of now). Thanks for your patience with the long break between the releases, we (hopefully) won't do that to you again. Happy Dancing! See you in February! -- Jason A. Crome / CromeDome CPAN: https://metacpan.org/author/CROMEDOME GitHub: https://github.com/cromedome Twitter: https://twitter.com/cromedome Blog: https://cromedome.net

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Form modules?
by Morse, Richard E.,MGH 29 Jan '21

29 Jan '21

Hi! The various templating systems don't seem to be very useful for dealing with generating HTML forms that already have data in them, especially if some of the form needs to be generated programatically. What do people use for this instead? Thanks, Ricky The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Mass General Brigham Compliance HelpLine at http://www.massgeneralbrigham.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.

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Retrieving the current prefix?
by Morse, Richard E.,MGH 21 Jan '21

21 Jan '21

Hi! I'm starting to learn Dancer2. One question I have is whether it is possible to retrieve the current prefix in some way? In particular, I am showing a listing of things, and I would like to add an edit link. I have the following setup: prefix '/foo'; get '/' => sub { forward '/foo'; }; get '' => sub { my @rows = database->quick_select(...); foreach my $r (@rows) { $r->{'edituri'} = uri_for( '/foo/' . $r->{'id'}); } template 'foo.tt', { 'listing' => \@rows, 'adduri' => uri_for( '/foo/add' ) }; }; I feel like I should be able to get rid of the '/foo' bit in the `forward` and `uri_for` calls — if this changes, I now need to change it in multiple places, and could introduce a typo. I tried doing `uri_for( prefix . '/' . $r->{'id'})`, but that didn't work. If there isn't some obvious way to do this, how to other people manage these kinds of things? Thanks, Ricky The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Mass General Brigham Compliance HelpLine at http://www.massgeneralbrigham.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.

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CI using GitHub Actions
by Gabor Szabo 12 Jan '21

12 Jan '21

Hi, I have already started to work on this, but I would be glad to get your input on setting up CI on GitHub Actions: https://github.com/PerlDancer/Dancer2/issues/1571 Gabor

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