NAME

Apache2::Filter::Minifier::JavaScript - JavaScript minifying output filter for mod_perl

SYNOPSIS

<LocationMatch "\.js$">
    PerlOutputFilterHandler   Apache2::Filter::Minifier::JavaScript

    # if you need to supplement MIME-Type list
    PerlSetVar                JsMimeType  text/json

    # if you want to explicitly specify the minifier to use
    #PerlSetVar               JsMinifier  JavaScript::Minifier::XS
    #PerlSetVar               JsMinifier  JavaScript::Minifier
    #PerlSetVar               JsMinifier  MY::Minifier::function
</LocationMatch>

DESCRIPTION

Apache2::Filter::Minifier::JavaScript is a Mod_perl2 output filter which minifies JavaScript using JavaScript::Minifier or JavaScript::Minifier::XS.

Only JavaScript documents are minified, all others are passed through unaltered. Apache2::Filter::Minifier::JavaScript comes with a list of several known acceptable MIME-Types for JavaScript documents, but you can supplement that list yourself by setting the JsMimeType PerlVar appropriately (use PerlSetVar for a single new MIME-Type, or PerlAddVar when you want to add multiple MIME-Types).

Given a choice, using JavaScript::Minifier::XS is preferred over JavaScript::Minifier, but we'll use whichever one you've got available. If you want to explicitly specify which minifier you want to use, set the JsMinifier PerlVar to the name of the package/function that implements the minifier. Minification functions are expected to accept a single parameter (the JavaScript to be minified) and to return the minified JavaScript on completion. If you specify a package name, we look for a minify() function in that package.

Caching

Minification does require additional CPU resources, and it is recommended that you use some sort of cache in order to keep this to a minimum.

Being that you're already running Apache2, though, here's some examples of a mod_cache setup:

Disk Cache

# Cache root directory
CacheRoot /path/to/your/disk/cache
# Enable cache for "/js/" location
CacheEnable disk /js/

Memory Cache

# Cache size: 4 MBytes
MCacheSize 4096
# Min object size: 128 Bytes
MCacheMinObjectSize 128
# Max object size: 512 KBytes
MCacheMaxObjectSize 524288
# Enable cache for "/js/" location
CacheEnable mem /js/

METHODS

handler($filter)

JavaScript minification output filter.

AUTHOR

Graham TerMarsch (cpan@howlingfrog.com)

Many thanks to Geoffrey Young for writing Apache::Clean, from which several things were lifted. :)

COPYRIGHT

This is free software; you can redistribute it and/or modify it under the same license as Perl itself.

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