最近在用Python写游戏服务器,想更换掉老旧的protobuf2,
看了下proto3的语法,来测试下:
服务器环境 与 protoc 版本:
# cat /etc/redhat-release
CentOS Linux release 7.8.2003 (Core)
# protoc --version
libprotoc 3.11.4
一、安装 Python 的protobuf包:
1.1 默认安装最新版本
# pip install protobuf
1.2 查看protobuf包信息:
# pip show protobuf
Name: protobuf
Version: 3.12.2
Summary: Protocol Buffers
Home-page: https://developers.google.com/protocol-buffers/
Author: None
Author-email: None
License: 3-Clause BSD License
Location: /usr/local/lib/python3.6/site-packages
Requires: setuptools, six
二、编写编译proto文件:
2.1 编写proto文件:
# cat pack.proto
syntax = "proto3"; // 语法协议
package pack.base; // 命名空间
// 枚举,登录类型
enum LoginType{
GUEST = 0;
APPLE = 1;
RENREN = 2;
FACEBOOK = 3;
KAIXIN = 4;
GAMECENTER = 5;
SINA = 6;
WEICHAT = 7;
ALIPAY = 8;
}
message LoginReq{
string sig = 1;
LoginType login_type = 2;
string openid = 3;
string channel = 4;
string version = 5;
string device_id = 6;
string mac_id = 7;
repeated int32 login_num = 8;
}
注意: proto3 仅仅支持 repeated字段修饰,如果使用required,optional编译会报错。
2.2 在proto文件目录,创建编译文件夹:
# mkdir proto_python
2.3 编译proto文件,生成python类:
# protoc --python_out=./proto_python pack.proto
目录结构如下:
─proto_python
│ pack_pb2.py
│ __init__.py
│
└─__pycache__
├─ test_proto.py
三、测试脚本:
# cat test_proto.py
# coding=utf8
"""
protobuf 测试, python
编译proto文件,生成 python类
# protoc --python_out=./proto_python pack.proto
安装protobuf解析第三方包,google出品
# pip install protobuf
"""
import uuid
import time
import random
import string
from proto_python.pack_pb2 import LoginType, LoginReq
# 实例化
req = LoginReq()
req.sig = uuid.uuid4().hex
# 枚举变量
req.login_type = LoginType.WEICHAT
req.openid = 'openid_{}'.format(int(time.time()))
req.channel = '-'.join(random.sample(string.ascii_uppercase, 6))
req.version = 'v{}'.format(random.randint(10, 200))
random_list = string.ascii_lowercase + string.ascii_uppercase + string.digits
req.device_id = ''.join(random.sample(random_list, 25))
req.mac_id = '-'.join(random.sample(string.ascii_lowercase +
string.digits, 10))
# repeated 的两种填充方式,和 protobuf2 不同
req.login_num.append(1)
req.login_num.extend([2, 3, 4])
# 序列化成二进制字符串
data = req.SerializeToString()
# 解析实例化
req_parse = LoginReq()
# 二进制字符串反序列化
req_parse.ParseFromString(data)
print(type(req_parse), req_parse)
print(req_parse.sig, req_parse.login_type,
req_parse.openid, req_parse.login_num)
输出结果如下:
# python test_proto.py
<class 'pack_pb2.LoginReq'> sig: "e8ab25f6f1474cb7b2e2c85f61fdad12"
login_type: WEICHAT
openid: "openid_1597743198"
channel: "S-N-T-A-E-L"
version: "v163"
device_id: "UP5xYgMdOlEvXsezGc23QNua6"
mac_id: "c-7-f-q-y-j-8-5-s-g"
login_num: 1
login_num: 2
login_num: 3
login_num: 4
e8ab25f6f1474cb7b2e2c85f61fdad12 7 openid_1597743198 [1, 2, 3, 4]
来源:oschina
链接:https://my.oschina.net/u/3906711/blog/4505656