How to use Google's protocol-buffer

protocbuf introduction

Protocol-buffer is a Technic of Google( aplhabet corp.) , which is used to interchange data on network. Protocol-buffer has its own syntax and compiler and compact serialized output format.
More details about encoding is as following:

Encoding

official intro

Source code

Protocol-buffer

Building

Example

Text

• regreq.txt

head{ magic:0xaabbccdd len:8 version:1 reserved:0 }
body{ name:"harrywu" age:22 }

Protoc-Buffer

• regreq.proto

package com.example.register

message Head{
    required uint32 magic   = 5;
    required uint32 len     = 6;
    required uint32 version = 7;
    required uint32 reserved= 8;
}

message Body{
    required uint32 age  = 3;
    required string name = 4;
}

message RegisterRequest
{
    required Head head = 1;
    required Body body = 2;
}

encode

protoc --encode=com.example.regisger.RegisterRequest ./regreq.proto < regreq.txt >regreq.bin

decode

protoc --decode=com.example.register.RegisterRequest ./regreq.proto <regreq.bin >regreq.txt