一、新建User.proto

文件：User.proto

message User {
  required string name = 1;
  required int32 age = 2;
  required int32 sex = 3;
  required string msg = 4;
}

二、使用

var fs = require('fs');
var protocolBuffers = require('protocol-buffers');

var Schema = protocolBuffers(fs.readFileSync('./user.proto'));

User = {
    init: function() {
    },
    encode: function(obj) {
        var buf = Schema.User.encode(obj);
        console.log('长度：%s---buffer:%j',buf.length,buf);
        return buf;
    },
    decode: function(data) {
        var obj = Schema.User.decode(data);
        return console.log(obj);
    }
};

encoded = User.encode({
    name :'zhangsan',
    age  :16,
    sex  :'1',
    msg  :'hello world'
});
User.decode(encoded);