Golang base64 加密解密

base64.stdEncoding （标准加密）
base64.URLEncoding（URL 加密）

Demo : 替换一个经过URL 加密的URL

const PRESIGN_URL = "http://www.jack.com:9200"

func getpresign(url string) (result string) {
	m := strings.SplitAfter(url, "/")
	s := m[4:]
	var num string
	for _, v := range s {
		num = num + v
	}
	n, _ := base64.URLEncoding.DecodeString(num)
	result = string(n)
	return PRESIGN_URL + result
}

func main() {
	var str = "https://www.baidu.com/s/L2xiNTkuNjBfdXNlcjAxX2J1Y2tldDAxL016RXhNams1T1RBeE9URXdNakl3T0RBd01EQXdNRGczP0FXU0FjY2Vzc0tleUlkPWxiNTkuNjBfdXNlcjAxJkV4cGlyZXM9MTYzMjY2MTYwMCZTaWduYXR1cmU9QXFIRCUyRlQzUWVNYyUyQlNFZ3lYVXpHcUhlNXZ3dyUzRA==/rIa18v0ymr4vVj5rH5pOa99K"
	result := getpresign(str)
	fmt.Println(result)
}