Class: Ramaze::Filter::Gzip

Inherits:
Object show all
Extended by:
Trinity
Defined in:
lib/ramaze/contrib/gzip_filter.rb

Class Method Summary collapse

Methods included from StateAccessor

each, #state_accessor, #state_reader, #state_writer

Class Method Details

.call(response, options = {}) ⇒ Object

Enables being plugged into Dispatcher::Action::FILTER



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# File 'lib/ramaze/contrib/gzip_filter.rb', line 39

def call( response, options = {} )
  return response unless trait[ :enabled ]
  return response unless body = response.body
  return response if body.respond_to?( :read )

  accepts = request.env[ 'HTTP_ACCEPT_ENCODING' ]
  return response if accepts.nil? || ( accepts !~ /(x-gzip|gzip)/ )

  acceptable_size = body.size >= trait[ :threshold ]
  acceptable_type = response.content_type =~ trait[:content_type]

  if acceptable_type and acceptable_size
    output = StringIO.new
    def output.close
      # Zlib closes the file handle, so we want to circumvent this
      rewind
    end
    gz = Zlib::GzipWriter.new( output )
    gz.write( body )
    gz.close

    response.body = output.string
    response.header[ 'Content-encoding' ] = 'gzip'
  end

  response
end