File (html/css/js/etc..) minification module for Caddy v2

powered by tdewolff/minify & inspired by hacdias/caddy-v1-minify

Caddy module ID

http.handlers.minify

Support formats

• html: text/html
• css: text/css
• svg: image/svg+xml
• js: ^(application|text)/(x-)?(java|ecma)script$
• json: [/+]json$
• xml: [/+]xml$

Performance

See https://github.com/tdewolff/minify#performance

How to use

Make sure to order the handler in the correct place:

{
    order minify after encode
}

With file_server:

example.com {
    minify
    root ./test
    file_server     
}

or reverse_proxy:

example.com {
    minify
    reverse_proxy localhost:8080
}

limit formats (format all when not specified.):

example.com {
    minify {
        formats html css js
    }
    
    reverse_proxy
}

or simply:

example.com {
    minify html css js
    reverse_proxy localhost:8080
}

Limitations

This module doesn't minify the original responses that have already been compressed, It just skips them.

To work around this, you may send the Accept-Encoding: identity request header to the upstream to tell it not to compress the response. For example:

reverse_proxy localhost:8080 {
    header_up Accept-Encoding identity
}