Plack::Middleware::Expires - mod_expires for plack

use Plack::Builder;

builder {
    enable 'Expires',
      content_type => qr!^image/!i,
      expires => 'access plus 3 months';
    $app;
}

Plack::Middleware::Expires is Apache's mod_expires for Plack. This middleware controls the setting of Expires HTTP header and the max-age directive of the Cache-Control HTTP header in server responses.

Note:

• Expires works only for successful response,
• If an Expires HTTP header exists already, it will not be overridden by this middleware.

• content_type

    content_type => qr!^image!,
    content_type => 'text/css',
    content_type => [ 'text/css', 'application/javascript', qr!^image/! ]
  

  Content-Type header to apply Expires

  also content_type accept CodeRef

    content_type => sub { my $env = shift; return 1 if $env->{..} }
  

• Expires

  Same format as the Apache mod_expires

    expires => 'M3600' # last_modified   1 hour
    expires => 'A86400' # access   1 day
    expires => 'modification plus 3 years 3 month 3 day'
    expires => 'access plus 3 days'
  

Masahiro Nagano <kazeburo {at} gmail.com>

http://httpd.apache.org/docs/2.2/en/mod/mod_expires.html

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