Convert the content of file in args[1] to base64 and saves it to the location in args[2] Example: $ go run base64convert ./foo.pdf ./fooInBase64.txt

base64convert.go

package main

import (
	"encoding/base64"
	"fmt"
	"os"
	"io/ioutil"
)

// Take the file specified in args[1]
// and convert it to base64 and save
// save the result in the file specified
// in args[2]
func main() {
	
	if len(os.Args) == 3 {
		startFile := os.Args[1]
		endFile := os.Args[2]
		// read whole the file
		b, err := ioutil.ReadFile(startFile)
		if err != nil {
			panic(err) 
		}

		//Convert it
		base64str := base64.StdEncoding.EncodeToString(b)
	
		//Save it to file again
		err = ioutil.WriteFile(endFile, []byte(base64str), 0644)
		if err != nil { 
			panic(err) 
		}
		fmt.Println("Done!")

	} else {
		fmt.Println("Wrong number of start arguments:")
		fmt.Println("Arg 1: Filepath to read from")
		fmt.Println("Arg 2: Filepath to save the converted version to")	
	}
}