when "application/gzip" then io = Zlib::GzipReader.open(@file)
when "application/x-bzip" then io = Bzip2::FFI::Reader.open(@file)
end
when "application/gzip" then io = Zlib::GzipReader.open(@file)
when "application/x-bzip" then io = Bzip2::FFI::Reader.open(@file)
end