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.