vendor/rails/activesupport/lib/active_support/gzip.rb

   1 require 'zlib'
   2 require 'stringio'
   3
   4 module ActiveSupport
   5   # A convenient wrapper for the zlib standard library that allows compression/decompression of strings with gzip.
   6   module Gzip
   7     class Stream < StringIO
   8       def close; rewind; end
   9     end
  10
  11     # Decompresses a gzipped string.
  12     def self.decompress(source)
  13       Zlib::GzipReader.new(StringIO.new(source)).read
  14     end
  15
  16     # Compresses a string using gzip.
  17     def self.compress(source)
  18       output = Stream.new
  19       gz = Zlib::GzipWriter.new(output)
  20       gz.write(source)
  21       gz.close
  22       output.string
  23     end
  24   end
  25 end