---
name: "Plack::Middleware::Expires"
section: "3pm"
platform: "linux"
package: "libplack-middleware-expires-perl"
version: "0.06-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Plack::Middleware::Expires"
---

# Plack::Middleware::Expires(3pm)

mod\_expires for plack

## 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.