Compress a collection of js files with closure compiler

ruby_closure_compiler_helper.rb

require 'net/http'
require 'uri'

COMPRESS_LEVEL = "SIMPLE_OPTIMIZATIONS"
FILE_PATH = "assets/www/"
FILES = ['application','custom','plugin','base']

def compress(compilation_level,jscode)
  response = Net::HTTP.post_form(URI.parse('http://closure-compiler.appspot.com/compile'), {
                                   'js_code' => jscode,
                                   'compilation_level' => "#{compilation_level}",
                                   'output_format' => 'text',
                                   'output_info' => 'compiled_code'
                                 })
  response.body
end

FILES.each do |f|
  filename = FILE_PATH + f + ".js"
  compressed_filename = FILE_PATH + f + ".min.js"
  content = File.read(filename)
  result = compress(COMPRESS_LEVEL, content)
  File.open(compressed_filename, 'w') {|f| f.write(result) }
end

puts "done"