protocol buffers

README.md

proto example

Install and run

• install protoc (google for download)
• clone repo
• go get ./...
• make
• go run proto-main.go

Makefile

.PHONY: gen_protos
gen_protos:
	protoc -I=./ --go_out=./generatedprotos/ ./person.proto

person.proto

syntax = "proto3";
package main;

message Person {
    string nickname = 1;
    
    enum Status {
        Unknown = 0;
        Active = 1;
        Disabled = 2;
    }

    Status status = 3;
    string secondNickname = 4;
}

proto-main.go

package main

import (
	"bytes"
	"encoding/json"
	"io"
	"io/ioutil"
	"os"
	"time"

	"github.com/gogo/protobuf/proto"
)

func main() {

	fileName := time.Now().Format(time.Kitchen)

	write(fileName)

	read(fileName)
}

func write(fileName string) {
	file, err := os.Create(fileName)
	if err != nil {
		panic(err)
	}
	defer file.Close()

	person := &Person{
		Nickname: "Johnny",
		Status:   Person_Disabled,
	}

	b, err := proto.Marshal(person)
	if err != nil {
		panic(err)
	}

	_, err = io.Copy(file, bytes.NewBuffer(b))
	if err != nil {
		panic(err)
	}
}

func read(fileName string) {
	file, err := os.Open(fileName)
	if err != nil {
		panic(err)
	}
	defer file.Close()

	b, err := ioutil.ReadAll(file)
	if err != nil {
		panic(err)
	}

	person := new(Person)
	err = proto.Unmarshal(b, person)
	if err != nil {
		panic(err)
	}

	json.NewEncoder(os.Stderr).Encode(person)
}