protobuf-net（De）SerializeWithLengthPrefix的原始原型表示形式

Question

First of all, this is NOT a duplicate of this other question so please read my question fully before flagging it.

I need to write out raw proto files that match up with C# (de)serialized messages read and written using Serializer.NonGeneric.(De)Serialize. I currently use PrefixStyle.Base128 and would like to continue doing so (unless using PrefixStyle.Fixed32 is the only way forward).

For example, given a message:

message KeyValuePair {
   optional string Key = 1;
   optional string Value = 2 [default = ""];
}

According to this Google groups thread, @marc-gravell says " ...SerializeWithLengthPrefix method, by default, aims to represent data in a way that is a valid protobuf stream - in particular, as though it were simply a member of a parent object or list... "

What would the " parent object or list " look like in a raw proto definition when serialized using

Serializer.NonGeneric.SerializeWithLengthPrefix(<stream>, new KeyValuePair { Name = "foo", Value = "Bar" }, PrefixStyle.Base128, <unique_message_id>)

?

Thanks in advance for any help!

Answer 1

message DummyDoesNotExist {
    optional KeyValuePair Value = <unique_message_id>;
}

On the wire, this is then:

varint: [wire-type: length-prefixed, field: <unique_message_id>] // typically 1 byte
varint: [length] // typically 1 or 2 bytes
[length bytes of KeyValuePair data]