问题描述
我需要在计算机之间交换protobuf-net对象和文件，并试图找出实现此目的的最佳方法。 A是否有办法通知B紧随其后的对象是协议缓冲区还是文件？或者，在传输文件时，是否有办法知道文件已结束并且其后的Byte []是protobuf？
I need to exchange both protobuf-net objects and files between computers and am trying to figure out the best way to do that. Is there a way for A to inform B that the object that follows is a protobuf or a file? Alternately, when a file is transmitted, is there a way to know that the file has ended and the Byte[] that follows is a protobuf?
使用C＃4.0，Visual Studio 2010
Using C# 4.0, Visual Studio 2010
谢谢Manish
推荐答案
这无关与protobuf或文件，以及与通讯协议有关的一切，特别是成帧。这意味着简单：如何在单个流中标记子消息。例如，如果这是原始套接字，则可以选择发送（全部）
This has nothing to do with protobuf or files, and everything to do with your comms protocol, specifically "framing". This means simply: how you demark sub-messages in a single stream. For example, if this is a raw socket you might choose to send (all of)
- 简短的消息类型，也许是字节： 01表示文件，02表示特定文件的protobuf消息
- 长度前缀（通常为4字节，网络字节顺序）
- 有效负载，由先前的字节数组成。
然后冲洗并重复每条消息。
Then rinse and repeat for each message.
您没有说明您要问的是什么通讯，所以我可以更具体一些。
You don't state what comms you are asking, so I can be more specific.
顺便说一句，另一种方法是将文件视为protobuf带有byte []成员的消息-尽管主要适用于小文件
Btw, another approach would be to treat a file as a protobuf message with a byte[] member - mainly suitable for small files, though
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