通过 protobuf 在服务器（node.js）和客户端（python/node.js）之间交换消息

Question

I'm studying protobuf protocol and got the problem when server(node js) + client(python) do not want to exchange msgs. Between server(node js) + client(node js) no problem. Both clients use the same server. I found difference between python and node js clients, after serialization msg byte arrays are different and it can be a cause of issue. But my knowledge is not enough to fix the issue. May be someone see the problem?

client js

const instance = new Product.Id().setValue(12345);
let message = instance.serializeBinary();
console.log(message); //Uint8Array(3) [ 8, 185, 96 ]
let response = await fetch('http://localhost:3008/api/getById', {
    method: 'POST',
    body: message,
    headers: {'Content-Type': 'application/protobuf'}
});

client py

instance.id.value = 12345
byte = instance.SerializeToString()
print(byte) #b'\n\x03\x08\xb9`'
response = requests.post(url = "http://localhost:3008/api/getById", headers={'Content-Type': 'application/protobuf'}, data=byte)

server receives: client js: 08 b9 60 client py: 0a 03 08 b9 60

Also i found this topic: Serialization problem using protobuf between python and nodejs If it is encoding issue how to encode properly?

Answer 1

Problem detected, instead of:

instance.id.value = 12345
byte = instance.SerializeToString()

should be:

instance.id.value = 12345
byte = instance.id.SerializeToString()