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>

LICENSE