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Contents
# Copyright (c) 2008 Michael Fellinger m.fellinger@gmail.com
# All files in this distribution are subject to the terms of the Ruby license.
# gzip_filter.rb
#
# Use this to compress "large" pages with gzip. All major browsers support gzipped pages.
# This filter brought to you by your friends in #ramaze: Pistos, manveru, rikur and Kashia.
#
# Usage, in start.rb:
#
# require 'ramaze/contrib/gzip_filter'
# Ramaze::Dispatcher::Action::FILTER << Ramaze::Filter::Gzip
require 'zlib'
module Ramaze
module Filter
class Gzip
trait :enabled => true
trait :threshold => 32768 # bytes
class << self
include Ramaze::Trinity
# Enables being plugged into Dispatcher::Action::FILTER
def call( response, options = {} )
return response if not trait[ :enabled ]
return response if response.body.nil?
return response if response.body.respond_to?( :read )
accepts = request.env[ 'HTTP_ACCEPT_ENCODING' ]
return response if accepts.nil? || ( accepts !~ /(x-gzip|gzip)/ )
if response.content_type == 'text/html' && response.body.size > trait[ :threshold ]
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( response.body )
gz.close
response.body = output.string
response.header[ 'Content-encoding' ] = 'gzip'
end
response
end
end
end
end
end
Version data entries
8 entries across 8 versions & 3 rubygems