Comments on: Using Plack to run a Dancer app under a CGI environment

By: Tatsuhiko Miyagawa

Tatsuhiko Miyagawa — Fri, 15 Jan 2010 03:24:25 +0000

Yes, Robin’s example is more compatible an DRY (Do not Repeat Yourself) since that works as a FCGI script as well as a standalone server.

Alternatively you can write like:

use Plack::Runner;
Plack::Runner->run(‘/path/to/your/app.psgi’);

We’re in the process of renaming Plack::Server into something else now, and i recommend you to write your bootstrap script like that.

By: Robin Smidsrød

Robin Smidsrød — Thu, 14 Jan 2010 12:07:49 +0000

You are aware that you can run any .psgi as CGI by setting the shebang to use plackup and making the .psgi executable?

Like this: #!/usr/bin/env plackup

This of course requires that plackup is available in the path of the user running CGI script. If you use local::lib or PERL5LIB things quickly get more complicated. If you’re into running it as fastcgi (for more speed) without having root you should take a look at my Plack::App::Apache::ActionWrapper on CPAN.

By: sukria

sukria — Wed, 13 Jan 2010 11:35:46 +0000

And now that miyagawa shiped CGI::PSGI 0.07, we can deploy any Dancer app under Apache2 + mod_perl as well.

By: trydancing

trydancing — Wed, 13 Jan 2010 01:25:23 +0000

Thanks for the prompt response.
sukria++, miyagawa++

I disabled warning to play around with Dancer and was able to create a simple yet working website in only hours.

Dancer rocks!

By: sukria

sukria — Tue, 12 Jan 2010 10:08:04 +0000

@trydancing: issue reported: http://github.com/sukria/Dancer/issues#issue/14 and BTW, miyagawa has fixed the warn in Plack::Server::Standalone so both sides will be fixed soon.

@Sawyer X : you’re welcome, thanks for blogging about Dancer, that’s really nice!

By: Sawyer X

Sawyer X — Tue, 12 Jan 2010 08:30:54 +0000

Hey!

Yesterday, a few hours after my post, I was sitting at a hummus place with my girlfriend. I told her about the post I wrote. I decided to take a minute to check online if anyone has any example of how to run PSGI as CGI.

One of the first results on Google was this page!

So, first of all, thanks for taking the time to correct me and show me an actual example of how to do this.

Secondly, thanks for Dancer! :)

By: sukria

sukria — Tue, 12 Jan 2010 08:19:48 +0000

Currently, plackup use warn to tell the user the connection is up, and Dancer will catch that warning as a “Compilation Warning”. That’s either a strictness leak in Dancer’s code or an overuse of warn in plackup, depending on the point of view of the observer.

Anyways, I’m going soon to fix that in Dancer’s code, and hopefully plackup won’t use warn to output information on STDERR.

In the meantime, I suggest you just disable the strict mode in Dancer by setting watnings to false, in your config.yml file:

warnings: 0

By: trydancing

trydancing — Tue, 12 Jan 2010 01:49:19 +0000

I followed your instruction on: http://www.sukria.net/fr/archives/2009/09/20/mounting-a-dancer-app-into-apache-psgiplack/

But got a compilation warning with the following stack error:

main in /home/saturn/perl5/bin/plackup l. 9 Plack::Runner in /home/saturn/perl5/lib/perl5/Plack/Runner.pm l. 120 Plack::Server::Standalone in /home/saturn/perl5/lib/perl5/Plack/Server/Standalone.pm l. 51 Plack::Server::Standalone in /home/saturn/perl5/lib/perl5/Plack/Server/Standalone.pm l. 101 Plack::Server::Standalone in /home/saturn/perl5/lib/perl5/Plack/Server/Standalone.pm l. 142 Plack::Util in /home/saturn/perl5/lib/perl5/Plack/Util.pm l. 127 Try::Tiny in /home/saturn/perl5/lib/perl5/Try/Tiny.pm l. 39 Try::Tiny in /home/saturn/perl5/lib/perl5/Try/Tiny.pm l. 42 Plack::Util in /home/saturn/perl5/lib/perl5/Plack/Util.pm l. 121 Plack::Component in /home/saturn/perl5/lib/perl5/Plack/Component.pm l. 39 Plack::Middleware::ContentLength in /home/saturn/perl5/lib/perl5/Plack/Middleware/ContentLength.pm l. 10 Plack::Component in /home/saturn/perl5/lib/perl5/Plack/Component.pm l. 39 Plack::Middleware::AccessLog in /home/saturn/perl5/lib/perl5/Plack/Middleware/AccessLog.pm l. 21 Plack::Component in /home/saturn/perl5/lib/perl5/Plack/Component.pm l. 39 Plack::Middleware::StackTrace in /home/saturn/perl5/lib/perl5/Plack/Middleware/StackTrace.pm l. 27 Try::Tiny in /home/saturn/perl5/lib/perl5/Try/Tiny.pm l. 39 Try::Tiny in /home/saturn/perl5/lib/perl5/Try/Tiny.pm l. 42 Plack::Middleware::StackTrace in /home/saturn/perl5/lib/perl5/Plack/Middleware/StackTrace.pm l. 27 Plack::Util in app.psgi l. 12 Dancer in /home/saturn/perl5/lib/perl5/Dancer.pm l. 131 Dancer::Handler::PSGI in /home/saturn/perl5/lib/perl5/Dancer/Handler/PSGI.pm l. 21 Dancer::Handler in /home/saturn/perl5/lib/perl5/Dancer/Handler.pm l. 60 Dancer::Renderer in /home/saturn/perl5/lib/perl5/Dancer/Renderer.pm l. 24 Dancer::Renderer in /home/saturn/perl5/lib/perl5/Dancer/Renderer.pm l. 96 Dancer::Route in /home/saturn/perl5/lib/perl5/Dancer/Route.pm l. 235 Dancer::Error in /home/saturn/perl5/lib/perl5/Dancer/Error.pm l. 21 Dancer::Error in /home/saturn/perl5/lib/perl5/Dancer/Error.pm l. 120

What could be causing the problem?

By: ImaginaryRobot

ImaginaryRobot — Mon, 11 Jan 2010 19:19:40 +0000

Can you post an example using rewriterules instead of an AddHandler config? I have hacked together a CGI+mod_rewrite solution (no access to virtualhost config), but I suspect it’s doing more work than it needs to.