WebSafeBase64Decode

WebSafeBase64Decode  golang  (adapter zplay doubleclick )

func base64url_decode(s string) ([]byte, error) {

    base64Str := strings.Map(func(r rune) rune {

        switch r {

        case '-':

            return '+'

        case '_':

            return '/'

        }

        return r

    }, s)

    if pad := len(base64Str) % ; pad >  {

        base64Str += strings.Repeat("=", -pad)

    }

    return base64.StdEncoding.DecodeString(base64Str)

}