[Unity热更新]xlua集成luaprotobuf

参考链接：

https://blog.csdn.net/asasj57/article/details/108162925

https://blog.csdn.net/asasj57/article/details/108169282

lua-protobuf：

https://github.com/starwing/lua-protobuf

protobuf语法：

https://blog.csdn.net/qq_22660775/article/details/89163881

protobuf中的import与import public：

https://blog.csdn.net/fighting_mjtao/article/details/93179694

在这篇的基础上继续集成：

https://www.cnblogs.com/lyh916/p/15709042.html

查看dll，确保相关的方法已经在dll中

 

将项目工程\build\lua-protobuf\protoc.lua复制到项目的lua目录下

1.运行lua-protobuf官方的例子：

https://github.com/starwing/lua-protobuf/blob/master/README.zh.md

function Main.TestPB()
  local pb = require "pb"
  local protoc = require "protoc"

  -- 直接载入schema (这么写只是方便, 生产环境推荐使用 protoc.new() 接口)
  assert(protoc:load [[
     message Phone {
        optional string name        = 1;
        optional int64  phonenumber = 2;
     }
     message Person {
        optional string name     = 1;
        optional int32  age      = 2;
        optional string address  = 3;
        repeated Phone  contacts = 4;
     } ]])

  -- lua 表数据
  local data = {
     name = "ilse",
     age  = 18,
     contacts = {
        { name = "alice", phonenumber = 12312341234 },
        { name = "bob",   phonenumber = 45645674567 }
     }
  }

  -- 将Lua表编码为二进制数据
  local bytes = assert(pb.encode("Person", data))
  print(pb.tohex(bytes))

  -- 再解码回Lua表
  local data2 = assert(pb.decode("Person", bytes))
  print(table.dump(data2))
end

输出如下：

 

2.使用.proto文件改写上面的例子1

Phone.proto

syntax = "proto3";

message Phone {
    string name        = 1;
    int64  phonenumber = 2;
}

Person.proto

syntax = "proto3";

import "Phone.proto";

message Person {
    string name     = 1;
    int32  age      = 2;
    string address  = 3;
    repeated Phone  contacts = 4;
}

Main.lua

function Main.LoadProto(fileName)
  local path = CS.UnityEngine.Application.dataPath .. "/LuaScript/Proto/" .. fileName
  return CS.System.IO.File.ReadAllText(path)
end

function Main.TestPB2()
  local pb = require "pb"
  local protoc = require "protoc"
  local pc = protoc.new()

  pc:load(Main.LoadProto("Phone.proto"), "Phone.proto")
  pc:load(Main.LoadProto("Person.proto"), "Person.proto")

  -- lua 表数据
  local data = {
     name = "ilse",
     age  = 18,
     contacts = {
        { name = "alice", phonenumber = 12312341234 },
        { name = "bob",   phonenumber = 45645674567 }
     }
  }

  -- 将Lua表编码为二进制数据
  local bytes = assert(pb.encode("Person", data))
  print(pb.tohex(bytes))

  -- 再解码回Lua表
  local data2 = assert(pb.decode("Person", bytes))
  print(table.dump(data2))
end

输出如下：

3.使用.pb文件改写上面的例子2

下载protoc：https://github.com/protocolbuffers/protobuf/releases?page=1

cd到protoc.exe的目录，将.proto文件也放在该目录下，输入protoc.exe -o xx.pb xx.proto即可生成.pb文件，如下：

生成的Phone.pb如下：

Main.lua

function Main.LoadProtoBytes(fileName)
  local path = CS.UnityEngine.Application.dataPath .. "/LuaScript/Pb/" .. fileName
  return CS.System.IO.File.ReadAllBytes(path)
end

function Main.TestPB3()
  local pb = require "pb"

  pb.load(Main.LoadProtoBytes("Phone.pb"), "Phone.pb")
  pb.load(Main.LoadProtoBytes("Person.pb"), "Person.pb")

  -- lua 表数据
  local data = {
     name = "ilse",
     age  = 18,
     contacts = {
        { name = "alice", phonenumber = 12312341234 },
        { name = "bob",   phonenumber = 45645674567 }
     }
  }

  -- 将Lua表编码为二进制数据
  local bytes = assert(pb.encode("Person", data))
  print(pb.tohex(bytes))

  -- 再解码回Lua表
  local data2 = assert(pb.decode("Person", bytes))
  print(table.dump(data2))
end

注意上面使用的是pb.load

protoc:load传入的是字符串，然后内部转换为byte[]，再调用pb.load

pb.load传入的是byte[]