NAME

       Plack::Middleware::Expires - mod_expires for plack

SYNOPSIS

         use Plack::Builder;

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

DESCRIPTION

       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.

CONFIGURATIONS

       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'

AUTHOR

       Masahiro Nagano <kazeburo {at} gmail.com>

SEE ALSO

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

LICENSE

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