diff options
Diffstat (limited to 'activesupport/lib/active_support/gzip.rb')
-rw-r--r-- | activesupport/lib/active_support/gzip.rb | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/gzip.rb b/activesupport/lib/active_support/gzip.rb new file mode 100644 index 0000000000..7ffa6d90a2 --- /dev/null +++ b/activesupport/lib/active_support/gzip.rb @@ -0,0 +1,38 @@ +# frozen_string_literal: true + +require "zlib" +require "stringio" + +module ActiveSupport + # A convenient wrapper for the zlib standard library that allows + # compression/decompression of strings with gzip. + # + # gzip = ActiveSupport::Gzip.compress('compress me!') + # # => "\x1F\x8B\b\x00o\x8D\xCDO\x00\x03K\xCE\xCF-(J-.V\xC8MU\x04\x00R>n\x83\f\x00\x00\x00" + # + # ActiveSupport::Gzip.decompress(gzip) + # # => "compress me!" + module Gzip + class Stream < StringIO + def initialize(*) + super + set_encoding "BINARY" + end + def close; rewind; end + end + + # Decompresses a gzipped string. + def self.decompress(source) + Zlib::GzipReader.wrap(StringIO.new(source), &:read) + end + + # Compresses a string using gzip. + def self.compress(source, level = Zlib::DEFAULT_COMPRESSION, strategy = Zlib::DEFAULT_STRATEGY) + output = Stream.new + gz = Zlib::GzipWriter.new(output, level, strategy) + gz.write(source) + gz.close + output.string + end + end +end |