Function Handler

middleware/compress/handler.go:26–53

Handler wraps the provided http.Handler and provides transparent body compression based on a Request's "Accept-Encoding" header. Each handler instance pools its own compressors.

(next http.Handler)

//
// Each handler instance pools its own compressors.
func Handler(next http.Handler) http.Handler {
	h := handler{
		next: next,
	}
	h.zstd.New = func() interface{} {
		w, err := zstd.NewWriter(nil, zstd.WithEncoderLevel(zstd.SpeedFastest))
		if err != nil {
			panic(err)
		}
		return w
	}
	h.gzip.New = func() interface{} {
		w, err := gzip.NewWriterLevel(nil, gzip.BestSpeed)
		if err != nil {
			panic(err)
		}
		return w
	}
	h.flate.New = func() interface{} {
		w, err := flate.NewWriter(nil, flate.BestSpeed)
		if err != nil {
			panic(err)
		}
		return w
	}

	return &h
}

var _ http.Handler = (*handler)(nil)