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# 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](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.
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