Using Mojolicious with NGINX Unit

tbusch has asked for the wisdom of the Perl Monks concerning the following question:

I'm trying to get Mojolicious to work with NGINX Unit but I get the following error:

PSGI: Failed to run Perl Application: 
Undefined subroutine &main::1 called.
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My Perl script is the following:

#!/usr/bin/perl

use strict;
use Mojolicious::Lite;

get '/' => {text => 'Hello World'};

app->start;
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and my NGINX unit config is:

{
   "type": "perl",
   "processes": 5,
   "script": "/etc/unit/app.psgi",
   "environment": {
      "MOJO_MODE": "production"
   }
}
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Am I missing an environment variable ? It seems like Mojo is unable to detect in which environment it is. I have a similar setup for uWSGI where it works. Curiously the following script works in NGINX Unit:

#!/usr/bin/perl
use strict;
use warnings;
use Plack::Builder;

my $app = sub {
    my $env = shift;
    [200, [], ["Hello world from PSGI!\n"]];
};

builder {
    enable 'ContentLength';
    $app;
};
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Any help or hint would be immensely appreciated.

Comment on Using Mojolicious with NGINX Unit Select or Download Code

Replies are listed 'Best First'.
Re: Using Mojolicious with NGINX Unit by beech (Parson) on Feb 25, 2019 at 04:45 UTC
Hi, Am I missing an environment variable ? ?Have you tried `app->start('psgi');` ? You could also try https://metacpan.org/pod/Mojolicious::Guides::Cookbook#Plack-middleware `builder { ... app->start; };` [download]	[reply] [d/l] [select]
Re: Using Mojolicious with NGINX Unit by tbusch (Sexton) on Feb 23, 2019 at 19:21 UTC
I managed to eliminate the error by setting the env variable "PLACK_ENV" to anything which forces Mojolicious into PSGI mode, but Mojolicious seems to be hanging. Also I tested with Dancer2 and it works: `#!/usr/bin/perl use Dancer2; use strict; get '/' => sub { "Hello World!" }; dance;` [download]	[reply] [d/l]
Re^2: Using Mojolicious with NGINX Unit by Veltro (Hermit) on Feb 23, 2019 at 21:20 UTC
Is '`sub`' missing in `get '/' => {text => 'Hello World'};`? edit: Never mind that, it is actually ok. Got confused there for a moment looking at a different example: `use Mojolicious::Lite; get '/' => sub { my $c = shift; $c->render(text => "OHAI!"); }; app->start;` [download] From this topic that talks about PSGI: here	[reply] [d/l] [select]