plack::middleware::conditional(3pm) [debian man page]

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

NAME

       Plack::Middleware::Conditional - Conditional wrapper for Plack middleware

SYNOPSIS

	 use Plack::Builder;

	 builder {
	     enable_if { $_[0]->{REMOTE_ADDR} eq '127.0.0.1' } 'StackTrace', force => 1;
	     $app;
	 };

	 # or using the OO interface:
	 $app = Plack::Middleware::Conditional->wrap(
	     $app,
	     condition	=> sub { $_[0]->{REMOTE_ADDR} eq '127.0.0.1' },
	     builder => sub { Plack::Middleware::StackTrace->wrap($_[0], force => 1) },
	 );

DESCRIPTION

       Plack::Middleware::Conditional is a piece of meta-middleware, to run a specific middleware component under runtime conditions. The goal of
       this middleware is to avoid baking runtime configuration options in individual middleware components, and rather share them as another
       middleware component.

EXAMPLES

       Note that some of the middleware component names are just made up for the explanation and might not exist.

	 # Minify JavaScript if the browser is Firefox
	 enable_if { $_[0]->{HTTP_USER_AGENT} =~ /Firefox/ } 'JavaScriptMinifier';

	 # Enable Stacktrace when being accessed from the local network
	 enable_if { $_[0]->{REMOTE_ADDR} =~ /^10.0.1.*/ } 'StackTrace';

	 # Work with other conditional setter middleware:
	 # Transcode Jpeg on the fly for mobile clients
	 builder {
	     enable 'MobileDetector';
	     enable_if { $_[0]->{'plack.mobile_detected'} }
	       'TranscodeJpeg', max_size => 30_000;
	     $app;
	 };

       Note that in the last example MobileDetector should come first because the conditional check runs in pre-run conditions, which is from
       outer to inner: that is, from the top to the bottom in the Builder DSL code.

AUTHOR

       Tatsuhiko Miyagawa

       Steve Cook

SEE ALSO

       Plack::Builder

perl v5.14.2							    2012-04-14				       Plack::Middleware::Conditional(3pm)

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

NAME

       Plack::Middleware::Static - serve static files with Plack

SYNOPSIS

	 use Plack::Builder;

	 builder {
	     enable "Plack::Middleware::Static",
		 path => qr{^/(images|js|css)/}, root => './htdocs/';
	     $app;
	 };

DESCRIPTION

       Enable this middleware to allow your Plack-based application to serve static files.

       If the given request matches with the pattern defined in "path", this middleware will try to locate the file in "root". If the file exists
       it will be served but otherwise 404 response will be returned. See "pass_through" option below to change this behavior.

       If the requested document is not within the "root" (i.e. directory traversal) or the file is there but not readable, a 403 Forbidden
       response will be returned.

       The content type returned will be determined from the file extension based on Plack::MIME.

CONFIGURATIONS

       path, root
	     enable "Plack::Middleware::Static",
		 path => qr{^/static/}, root => 'htdocs/';

	   "path" specifies the URL pattern (regular expression) or a callback to match with requests to serve static files for. "root" specifies
	   the root directory to serve those static files from. The default value of "root" is the current directory.

	   This examples configuration serves "/static/foo.jpg" from "htdocs/static/foo.jpg". Note that the matched "/static/" portion is still
	   appears in the local mapped path. If you don't like it, use a callback instead to munge $_:

	     enable "Plack::Middleware::Static",
		 path => sub { s!^/static/!! }, root => 'static-files/';

	   This configuration would serve "/static/foo.png" from "static-files/foo.png" (not "static-files/static/foo.png"). The callback
	   specified in "path" option matches against $_ and then updates the value since it does s///, and returns the number of matches, so it
	   will pass through when "/static/" doesn't match.

	   If you want to map multiple static directories from different root, simply add "this", middleware multiple times with different
	   configuration options.

       pass_through
	   By turning on this option, this middleware will pass the request back to the application for further processing, if the incoming
	   request path matches with the "path" but the requested file is not found on the file system.

AUTHOR

       Tokuhiro Matsuno, Tatsuhiko Miyagawa

SEE ALSO

       Plack::Middleware Plack::Builder

perl v5.14.2							    2011-06-22					    Plack::Middleware::Static(3pm)