plack::runner(3pm) [debian man page]

Plack::Runner(3pm)					User Contributed Perl Documentation					Plack::Runner(3pm)

NAME

       Plack::Runner - plackup core

SYNOPSIS

	 # Your bootstrap script
	 use Plack::Runner;
	 my $app = sub { ... };

	 my $runner = Plack::Runner->new;
	 $runner->parse_options(@ARGV);
	 $runner->run($app);

DESCRIPTION

       Plack::Runner is the core of plackup runner script. You can create your own frontend to run your application or framework, munge command
       line options and pass that to "run" method of this class.

       "run" method does exactly the same thing as the plackup script does, but one notable addition is that you can pass a PSGI application code
       reference directly to the method, rather than via ".psgi" file path or with "-e" switch. This would be useful if you want to make an
       installable PSGI application.

       Also, when "-h" or "--help" switch is passed, the usage text is automatically extracted from your own script using Pod::Usage.

NOTES

       Do not directly call this module from your ".psgi", since that makes your PSGI application unnecessarily depend on plackup and won't run
       other backends like Plack::Handler::Apache2 or mod_psgi.

       If you really want to make your ".psgi" runnable as a standalone script, you can do this:

	 my $app = sub { ... };

	 unless (caller) {
	     require Plack::Runner;
	     my $runner = Plack::Runner->new;
	     $runner->parse_options(@ARGV);
	     return $runner->run($app);
	 }

	 return $app;

       WARNING: this section used to recommend "if (__FILE__ eq $0)" but it's known to be broken since Plack 0.9971, since $0 is now always set to
       the .psgi file path even when you run it from plackup.

SEE ALSO

       plackup

perl v5.14.2							    2012-03-21							Plack::Runner(3pm)

Plack::Middleware::Lint(3pm)				User Contributed Perl Documentation			      Plack::Middleware::Lint(3pm)

NAME

       Plack::Middleware::Lint - Validate request and response

SYNOPSIS

	 use Plack::Middleware::Lint;

	 my $app = sub { ... }; # your app or middleware
	 $app = Plack::Middleware::Lint->wrap($app);

	 # Or from plackup
	 plackup -e 'enable "Lint"' myapp.psgi

DESCRIPTION

       Plack::Middleware::Lint is a middleware component to validate request and response environment formats. You are strongly suggested to use
       this middleware when you develop a new framework adapter or a new PSGI web server that implements the PSGI interface.

       This middleware is enabled by default when you run plackup or other launcher tools with the default environment development value.

DEBUGGING

       Because of how this middleware works, it may not be easy to debug Lint errors when you encounter one, unless you're writing a PSGI web
       server or a framework.

       For example, when you're an application developer (user of some framework) and see errors like:

	 Body should be an array ref or filehandle at lib/Plack/Middleware/Lint.pm line XXXX

       there's no clue about which line of your application produces that error.

       We're aware of the issue, and have a plan to spit out more helpful errors to diagnose the issue. But until then, currently there are some
       workarounds to make this easier. For now, the easiest one would be to enable Plack::Middleware::REPL outside of the Lint middleware, like:

	 plackup -e 'enable "REPL"; enable "Lint"' app.psgi

       so that the Lint errors are caught by the REPL shell, where you can inspect all the variables in the response.

AUTHOR

       Tatsuhiko Miyagawa

       Tokuhiro Matsuno

SEE ALSO

       Plack

perl v5.14.2							    2011-09-22					      Plack::Middleware::Lint(3pm)