proto与json的互相转换

proto使用

生成逻辑请参考
https://blog.csdn.net/qq_43645782/article/details/127112663

proto

syntax = "proto3";

message testRequest {
  string id = 1;
}

python dict和message

import json

from google.protobuf.json_format import MessageToJson, MessageToDict
from google.protobuf.json_format import ParseDict, Parse

from grpc0.code.test_pb2 import testRequest

if __name__ == '__main__':
    proto_obj = testRequest(
        id="123",
    )
    print(f"{MessageToDict(proto_obj)=}")
    print(f"{MessageToJson(proto_obj)=}")

    json_obj = {"id": "456"}
    print(f"{Parse(json.dumps(json_obj), testRequest)=}")
    print(f"{ParseDict(json_obj, testRequest)=}")

MessageToDict(proto_obj)={'id': '123'}
MessageToJson(proto_obj)='{\n  "id": "123"\n}'
Parse(json.dumps(json_obj), testRequest)=<class 'test_pb2.testRequest'>
ParseDict(json_obj, testRequest)=<class 'test_pb2.testRequest'>

python message序列化

import json

from google.protobuf.json_format import MessageToJson, MessageToDict
from google.protobuf.json_format import ParseDict, Parse

from grpc0.code.test_pb2 import testRequest

if __name__ == '__main__':
    proto_obj = testRequest(
        id="123",
    )
    proto_bytes = proto_obj.SerializeToString()
    print(proto_bytes)
    proto_obj1 = testRequest()
    proto_obj1.ParseFromString(proto_bytes)
    print(proto_obj)
    print(proto_obj1)

b'\n\x03123'
id: "123"
id: "123"

golang

在golang使用比较简单，protobuf生成的go struct是支持proto和json的序列化和反序列化的

message序列化

out, err := proto.Marshal(protoObj)

err := proto.Unmarshal(in, &protoObj)

message转json

out, err := json.Marshal(protoObj)

err := json.Unmarshal(in, &protoObj)