base64.go

package main

// Go provides built-in support for base64 encoding/decoding.

import (
	b64 "encoding/base64"
	"fmt"
)

//This syntax imports the encoding/base64 package with the b64 name
// instead of the default base64. It’ll save us some space below.

// Base64 Illustrate B64 encoding / decoding in go.
func Base64() {
	// Here’s the string we’ll encode/decode.
	data := "abc123!?$*&()'-=@~"

	// Go supports both standard and URL-compatible base64.
	// Here’s how to encode using the standard encoder.
	// The encoder requires a []byte so we cast our string to that type.
	sEnc := b64.StdEncoding.EncodeToString([]byte(data))
	fmt.Println(sEnc)

	// Decoding may return an error,
	// which you can check if you don’t already know the input to be well-formed.
	sDec, _ := b64.StdEncoding.DecodeString(sEnc)
	fmt.Println(string(sDec))
	fmt.Println()

	// This encodes/decodes using a URL-compatible base64 format.
	uEnc := b64.URLEncoding.EncodeToString([]byte(data))
	fmt.Println(uEnc)

	uDec, _ := b64.URLEncoding.DecodeString(uEnc)
	fmt.Println(string(uDec))

	// The string encodes to slightly different values with the standard
	// and URL base64 encoders (trailing + vs -) but they both decode
	// to the original string as desired.

}