Class: Thoth::Minify

Inherits:
Object
  • Object
show all
Defined in:
lib/thoth/middleware/minify.rb

Overview

Rack middleware that intercepts and minifies CSS and JavaScript responses, caching the minified content to speed up future requests.

Constant Summary collapse

MINIFIERS = 
{
  'application/javascript' => JSMin,
  'text/css'               => CSSMin,
  'text/javascript'        => JSMin
}
EXCLUDE = 
[
  /-min\.(?:css|js)$/i
]

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Minify

Returns a new instance of Minify.



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# File 'lib/thoth/middleware/minify.rb', line 48

def initialize(app)
  @app = app

  Ramaze::Cache.add(:minify) unless Ramaze::Cache.respond_to?(:minify)
  @cache = Ramaze::Cache.minify
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/thoth/middleware/minify.rb', line 55

def call(env)
  @status, @headers, @body = @app.call(env)

  unless @status == 200 && @minifier = MINIFIERS[@headers['Content-Type']]
    return [@status, @headers, @body]
  end

  @path = Rack::Utils.unescape(env['PATH_INFO'])

  EXCLUDE.each {|ex| return [@status, @headers, @body] if @path =~ ex }

  @headers.delete('Content-Length')
  @headers['Cache-Control'] = 'max-age=3600,public'

  [@status, @headers, self]
end

#each {|@body| ... } ⇒ Object

Yields:

  • (@body) 


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# File 'lib/thoth/middleware/minify.rb', line 72

def each
  content = ''

  @body.each {|part| content << part.to_s }
  @body = @cache["minify_#{@path}"] ||= @minifier.minify(content)

  yield @body
end