Security with Go

Base64 encoding data

In the previous example, the QR code was base64 encoded. Since this is a common task, it is worth covering how to encode as well as decode. Any time binary data needs to be stored or transmitted as a string, base64 encoding is useful.

This example demonstrates a very simple use case of encoding and decoding a byte slice. The two important functions for base64 encoding and decoding are EncodeToString() and DecodeString():

package mainimport (   "encoding/base64"   "fmt"   "log")func main() {   data := []byte("Test data")   // Encode bytes to base64 encoded string.   encodedString := base64.StdEncoding.EncodeToString(data)   fmt.Printf("%s\n", encodedString)   // Decode base64 encoded string to bytes. decodedData, err := base64.StdEncoding.DecodeString(encodedString) ...