MagicHeader is the start of gzip files.
var MagicHeader = []byte{'\x1f', '\x8b'}
func Is(r io.Reader) (bool, error)
Is detects whether the input stream is compressed.
func ReadCloser(r io.ReadCloser) io.ReadCloser
ReadCloser reads uncompressed input data from the io.ReadCloser and returns an io.ReadCloser from which compressed data may be read. This uses gzip.BestSpeed for the compression level.
func ReadCloserLevel(r io.ReadCloser, level int) io.ReadCloser
ReadCloserLevel reads uncompressed input data from the io.ReadCloser and returns an io.ReadCloser from which compressed data may be read. Refer to compress/gzip for the level: https://golang.org/pkg/compress/gzip/#pkg-constants
func UnzipReadCloser(r io.ReadCloser) (io.ReadCloser, error)
UnzipReadCloser reads compressed input data from the io.ReadCloser and returns an io.ReadCloser from which uncompressed data may be read.