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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
#
# Setting options (at any point in your code):
#
# Ramaze::Filter::Gzip.trait(
# :threshold => 1024,
# :content_type => /^text\/.+/
# )
require 'zlib'
module Ramaze
module Filter
class Gzip
trait :enabled => true,
:content_type => /^text\/.+/,
:threshold => 32768 # bytes
class << self
include Ramaze::Trinity
# Enables being plugged into Dispatcher::Action::FILTER
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
end
end
end
end
Version data entries
14 entries across 14 versions & 4 rubygems