NAME

       Plack::App::Cascade - Cascadable compound application

SYNOPSIS

         use Plack::App::Cascade;
         use Plack::App::URLMap;
         use Plack::App::File;

         # Serve static files from multiple search paths
         my $cascade = Plack::App::Cascade->new;
         $cascade->add( Plack::App::File->new(root => "/www/example.com/foo")->to_app );
         $cascade->add( Plack::App::File->new(root => "/www/example.com/bar")->to_app );

         my $app = Plack::App::URLMap->new;
         $app->map("/static", $cascade);
         $app->to_app;

DESCRIPTION

       Plack::App::Cascade is a Plack middleware component that compounds several apps and tries
       them to return the first response that is not 404.

METHODS

       new
             $app = Plack::App::Cascade->new(apps => [ $app1, $app2 ]);

           Creates a new Cascade application.

       add
             $app->add($app1);
             $app->add($app2, $app3);

           Appends a new application to the list of apps to try. You can pass the multiple apps
           to the one "add" call.

       catch
             $app->catch([ 403, 404 ]);

           Sets which error codes to catch and process onwards. Defaults to 404.

AUTHOR

       Tatsuhiko Miyagawa

SEE ALSO

       Plack::App::URLMap Rack::Cascade