blob: fd9263500c36076aff0b49cf406ec600dcdbd854 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
# 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
|
