SYNOPSIS
```perl use Plack::Builder;
my $app = builder { enable "Plack::Middleware::ETag", file_etag => [qw/inode mtime size/]; sub {['200', ['Content-Type' => 'text/html'}, ['hello world']]}; }; ```
DESCRIPTION
Plack::Middleware::ETag adds automatically an ETag header. You may want to use it with "Plack::Middleware::ConditionalGET".
perl
my $app = builder {
enable "Plack::Middleware::ConditionalGET";
enable "Plack::Middleware::ETag", file_etag => "inode";
sub {['200', ['Content-Type' => 'text/html'}, ['hello world']]};
};
CONFIGURATION
file_etag
If the content is a file handle, the ETag will be set using the inode, modified time and the file size. You can select which attributes of the file will be used to set the ETag:
perl
enable "Plack::Middleware::ETag", file_etag => [qw/size/];
cache_control
It's possible to add 'Cache-Control' header.
perl
enable "Plack::Middleware::ETag", cache_control => 1;
Will add "Cache-Control: must-revalidate" to the headers.
perl
enable "Plack::Middleware::ETag", cache_control => [ 'must-revalidate', 'max-age=3600' ];
Will add "Cache-Control: must-revalidate, max-age=3600" to the headers.
perl
check_last_modified_header
Will not add an ETag if there is already a Last-Modified header.
AUTHOR
Franck Cuny franckcuny@gmail.com
LICENSE
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.