https://www.base64encoder.io/golang/
f := func(s string) (bsStr string) { sEnc := base64.StdEncoding.EncodeToString([]byte(s)) bsStr = sEnc return}
python3字符串base64编解码 - 槛外人666 - 博客园 https://www.cnblogs.com/kanneiren/p/9981084.html