I've run the example_recursive with some binary files , but after extract I found some files will lost special characters ( for example 0x1a is lost at file end ) .

Modify
def put_into_archive(disk_file_path, io, zip_file_path) io.get_output_stream(zip_file_path) do |f| f.write(File.open(disk_file_path, 'rb').read) end end

to
def put_into_archive(disk_file_path, io, zip_file_path) io.add(zip_file_path, disk_file_path) end

could fix this issue .