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.IX Title "Plack::App::Cascade 3pm"
.TH Plack::App::Cascade 3pm 2024-01-20 "perl v5.38.2" "User Contributed Perl Documentation"
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.SH NAME
Plack::App::Cascade \- Cascadable compound application
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 3
\&  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;
.Ve
.SH DESCRIPTION
.IX Header "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.
.SH METHODS
.IX Header "METHODS"
.IP new 4
.IX Item "new"
.Vb 1
\&  $app = Plack::App::Cascade\->new(apps => [ $app1, $app2 ]);
.Ve
.Sp
Creates a new Cascade application.
.IP add 4
.IX Item "add"
.Vb 2
\&  $app\->add($app1);
\&  $app\->add($app2, $app3);
.Ve
.Sp
Appends a new application to the list of apps to try. You can pass the
multiple apps to the one \f(CW\*(C`add\*(C'\fR call.
.IP catch 4
.IX Item "catch"
.Vb 1
\&  $app\->catch([ 403, 404 ]);
.Ve
.Sp
Sets which error codes to catch and process onwards. Defaults to \f(CW404\fR.
.SH AUTHOR
.IX Header "AUTHOR"
Tatsuhiko Miyagawa
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Plack::App::URLMap Rack::Cascade