module ActiveSupport::Gzip

def self.compress(source)

Compresses a string using gzip. 
def self.compress(source)
  output = Stream.new
  gz = Zlib::GzipWriter.new(output)
  gz.write(source)
  gz.close
  output.string
end

def self.decompress(source)

Decompresses a gzipped string. 
def self.decompress(source)
  Zlib::GzipReader.new(StringIO.new(source)).read
end