Golang protobuf marshal and unmarshal example

example.proto

syntax = "proto3";

message Message {
  bytes text = 1;
}

main.go

package main

import (
	fmt "fmt"

	"./example"
	"github.com/golang/protobuf/proto"
)

func main() {
	var text = []byte("hello")
	message := &example.Message{
		Text: text,
	}

	data, err := proto.Marshal(message)
	if err != nil {
		panic(err)
	}

	fmt.Println(data) // [10 5 104 101 108 108 111]

	newMessage := &example.Message{}
	err = proto.Unmarshal(data, newMessage)
	if err != nil {
		panic(err)
	}

	fmt.Println(newMessage.GetText()) // [104 101 108 108 111]
}

proto_pkg.sh

protoc --go_out=example example.proto