In this source code example, we will demonstrate how to use base64.URLEncoding to encode and decode a string (URLs) in Golang.

Golang provides built-in support for base64 encoding/decoding in the package encoding/base64.

Golang Encode and Decode Example using base64.URLEncoding

Here is an example of encoding and then decoding the URL using base64 encoding with URLEncoding.

package main

import (
    "encoding/base64"
    "fmt"
)

func main() {

    // String to encode
    str := "https://www.sourcecodeexamples.net/p/golang-source-code-examples.html"

    // It requires a byte slice so we cast the string to []byte
    encodedStr := base64.URLEncoding.EncodeToString([]byte(str))
    fmt.Println("Encoded:", encodedStr)

    // Decoding may return an error, in case the input is not well formed
    decodedStr, err := base64.URLEncoding.DecodeString(encodedStr )
    if err != nil {
        panic("malformed input")
    }
	
    fmt.Println("Decoded:", string(decodedStr))
}

Output:

Encoded: aHR0cHM6Ly93d3cuc291cmNlY29kZWV4YW1wbGVzLm5ldC9wL2dvbGFuZy1zb3VyY2UtY29kZS1leGFtcGxlcy5odG1s
Decoded: https://www.sourcecodeexamples.net/p/golang-source-code-examples.html

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