Дублирование потоков

main.go

package main

import (
	"bytes"
	"io"
	"io/ioutil"
	"log"
	"strings"
)

func main() {
	r := strings.NewReader("io.Reader stream to be read")
	var buf bytes.Buffer
	tee := io.TeeReader(r, &buf)


	teeBuf, _ := ioutil.ReadAll(tee)
	bufBuf, _ := ioutil.ReadAll(&buf)
	
	log.Println(string(teeBuf))
	log.Println(string(bufBuf))
}