1 files changed, 3 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/gzip.rb b/activesupport/lib/active_support/gzip.rb
index c65944dacd..35a50e9a77 100644
--- a/activesupport/lib/active_support/gzip.rb
+++ b/activesupport/lib/active_support/gzip.rb
@@ -2,15 +2,18 @@ require 'zlib'
 require 'stringio'
 
 module ActiveSupport
+  # A convenient wrapper for the zlib standard library that allows compression/decompression of strings with gzip.
   module Gzip
     class Stream < StringIO
       def close; rewind; end
     end
 
+    # Decompresses a gzipped string.
     def self.decompress(source)
       Zlib::GzipReader.new(StringIO.new(source)).read
     end
 
+    # Compresses a string using gzip.
     def self.compress(source)
       output = Stream.new
       gz = Zlib::GzipWriter.new(output)