Go by Example: Base64 Encoding

Go by Example : Base64 Encoding

Go provides built-in support for base64 encoding/decoding .
	`package main`
This syntax imports the `encoding/base64`package with the `b64`name instead of the default `base64`. It’ll save us some space below.	`import ( b64 "encoding/base64" "fmt" )`
	`func main() {`
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 convert 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.	`$ go run base64-encoding.go YWJjMTIzIT8kKiYoKSctPUB+ abc123!?$*&()'-=@~`
	`YWJjMTIzIT8kKiYoKSctPUB- abc123!?$*&()'-=@~`

Next example: Reading Files .