Add Base64 Encode Decode in Go (#4576)

Author: Kaamkiya

archive/g/go/base64-encode-decode.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"encoding/base64"
+	"fmt"
+	"os"
+)
+
+func die() {
+	fmt.Println("Usage: please provide a mode and a string to encode/decode")
+	os.Exit(1)
+}
+
+func main() {
+	if len(os.Args) < 3 {
+		die()
+	}
+
+	enc := base64.StdEncoding
+
+	if len(os.Args[2]) == 0 {
+		die()
+	}
+
+	switch os.Args[1] {
+	case "encode":
+		fmt.Println(enc.EncodeToString([]byte(os.Args[2])))
+		return
+	case "decode":
+		s, err := enc.DecodeString(os.Args[2])
+		if err != nil {
+			die()
+		}
+
+		fmt.Println(string(s))
+	default:
+		die()
+	}
+}