解析协议缓冲区，用 Java 编写并用 Python 读取 [英] Parsing Protocol Buffers, written in Java and read in Python

问题描述

我正在处理协议缓冲区已用 Java 写入的情况，但我必须使用 Python 读取它们.

I am dealing with a situation where the protocol buffers have been written to in Java, but I have to read them using Python.

我有 .proto 文件，我使用 protoc 编译它，并生成了 python 类文件.

I have the .proto file with me, I have compiled it using protoc, and generated the python class file.

proto 文件有多条消息，例如:

The proto file has multiple messages, for example:

message ABC {
    optional int64 id = 1 [default = -1];
    optional int64 hello6 = 2;
    optional bool hello5 = 3 [default = true];
    optional int32 hello4 = 4;
    optional int64 hello3 = 5;
    optional int64 hello2 = 6;
    optional int64 duration = 7;
}
message DEF {
    optional int64 hello = 1;
    repeated ABC abc = 5;
    repeated String xyz = 6;
  }

使用 .ParseFromString 在 python 中解析时.

While parsing in python using .ParseFromString.

我收到错误:

google.protobuf.message.DecodeError:标签的连线类型无效.

google.protobuf.message.DecodeError: Tag had invalid wire type.

我认为问题是因为没有明确的分隔符，知道如何解决吗?

I think the issue is because of absence of explicit delimiters, any idea how to solve it?

推荐答案

我遇到了类似的问题，这行得通:

I had similar issue for me this worked:

在 Java 中:

yourGeneratedClass.toByteArray()

在 Python 中你这样做(结果中的解析消息):

In Python you do(parsed message in result):

result = your_pb2.yourGeneratedClass()
result.ParseFromString(body)

这篇关于解析协议缓冲区，用 Java 编写并用 Python 读取的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！