package transform import ( "bytes" "io" ) type trans func([]byte) []byte type link trans type chain []link func NewChain(trs ...link) chain { return trs } func (c *chain) Apply(w io.Writer, r io.Reader) (err error) { buffer := new(bytes.Buffer) buffer.ReadFrom(r) b := buffer.Bytes() for _, tr := range *c { b = tr(b) } buffer.Reset() buffer.Write(b) buffer.WriteTo(w) return }