Plack::Middleware::Header - modify HTTP response headers

       Masahiro Chiba

       Plack::Middleware::Header

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself.

       Plack::Middleware::Header - modify HTTP response headers

       Plack::Middleware Plack::Builder

perl v5.34.0                                       2022-06-16                     Plack::Middleware::Header(3pm)

         use Plack::Builder;

         my $app = sub {['200', [], ['hello']]};
         builder {
             enable 'Header',
               set => ['X-Plack-One' => '1'],
               append => ['X-Plack-Two' => '2'],
               unset => ['X-Plack-Three'];
             $app;
         };