base64_uuid.go

package main

import (
	"fmt"
	"github.com/gofrs/uuid"
	"encoding/base64"
	"encoding/hex"
)

func main() {
	
	//u, _ := uuid.NewV4()
	//fmt.Println("original uuid: "+u.String())
	u := "1d5c15dd-8e3d-4212-85ff-319dbd5d07e2"
	encodeToHex(u)

	encodeToBase64(u)
	
	input := "aDxf5RxmTxyFatLyn1sNTA=="
	decodeFromBase64(input)
	
	ns := "clJYUtekQZy575dtofLrEA=="
	decodeFromBase64(ns)
}

func encodeToHex(uuidString string) {
	u, err := uuid.FromString(uuidString)
	if err != nil {
	   panic(err)
	}
	fmt.Println("hex string => "+hex.EncodeToString(u.Bytes()))
}

// encode from uuid to base64 string
func encodeToBase64(uuidString string) {
	
	u, err := uuid.FromString(uuidString)
	if err != nil {
	   panic(err)
	}

	encoded := base64.StdEncoding.EncodeToString(u.Bytes())
	fmt.Println("encoded uuid => base64 string: "+encoded)

}

// decode from base64 string to uuid string
func decodeFromBase64(input string) {
	decoded, err := base64.StdEncoding.DecodeString(input)
	if err != nil {
		panic(err)
	}
	
	uuid, err := uuid.FromBytes(decoded)
	if err != nil {
		panic(err)
	}
	
	fmt.Println("decoded base64 => uuid string: "+uuid.String())

}