http dump

log.WithField("dump=", "start").Debug("auth start")
dump, err := httputil.DumpResponse(resp, true)
if err != nil {
   log.Fatal(err)
}
log.WithField("dump??", string(dump[:])).Debug("auth dump")

// fmt.Printf("DUMP => %q", dump)

참고 : https://golang.org/pkg/net/http/httputil/