CocosCreator使用protobuf

素颜马尾好姑娘i 2022-06-12 05:44 620阅读 0赞

一、环境

操作系统 mac 10.12.2

CocosCreator 1.5.1

protobuf.js 6.7.0

二、正文

1、把与服务器协议好的.proto(我的文件是client.proto)文件放在assets/resources文件夹下。

2、在[https://github.com/dcodeIO/protobuf.js/releases/][https_github.com_dcodeIO_protobuf.js_releases]上下载相应的protobuf.js，把protobuf.js放到你的项目的script文件夹下（不一定是script文件夹，这只是一个规范，因为CocosCreator是仿照u3d来做的，而u3d的做法是把脚本放在script文件夹下）。

新建ProtobufManager.js（依旧是script文件夹下或者script的子目录），然后，上代码，这是本人小封装了一下的代码：

var ProtobufManager;
    (function(ProtobufManager) {
    	ProtobufManager.heartCount = 1;
    
    	var loadProtobuf = function() {
    		function callback(err, root) {
    			ProtobufManager.Root = root;
    			ProtobufManager.Command = root.lookup("proto.Command").values;
                GameServerManager.connectServer();
    		};
    		protobuf.load(cc.url.raw("resources/proto/client.proto"), callback);
    	};
    	ProtobufManager.loadProtobuf = loadProtobuf;
    
    	ProtobufManager.sendAutoID = function() {
    		var autoID = {id : this.heartCount};
    		this.serialize("proto.AutoID", autoID, this.Command.client_heart_beat);
    	}
    
    	ProtobufManager.getAutoID = function(buffer) {
    		return this.decode("proto.AutoID", buffer);
    	}
    
    	ProtobufManager.serialize = function(proto, object, command) {
    		var protobufObj = this.Root.lookupType(proto);
    		this.serializeProtobuf(protobufObj, object, command);
    	} 
    
    	ProtobufManager.serializeProtobuf = function(protobufObj, object, command) {
    		var message = this.checkMessage(protobufObj, object);
    		var buffer = this.serializeMessage(protobufObj, message);
    		this.packProtobuf(command, buffer);
    	}
    	ProtobufManager.checkMessage = function(protobufObj, object) {
    		var errMsg = protobufObj.verify(object);
    		if(errMsg) {
    			throw Error(errMsg);
    		}
    		var message = protobufObj.fromObject(object);
    		return message;
    	}
    	ProtobufManager.serializeMessage = function(protobufObj, message) {
    		var buffer = protobufObj.encode(message).finish();
    		var array = new Uint8Array(buffer);
    		return array;
    	}
    	ProtobufManager.decode = function(proto, buffer) {
    		var protobufObj = this.Root.lookupType(proto);
    		return this.decodeProtobuf(protobufObj, buffer);
    	}
    	ProtobufManager.decodeProtobuf = function(protobufObj, buffer) {
    		return protobufObj.decode(buffer);
    	}
    	ProtobufManager.packProtobuf = function(command, buffer) {
    		var len = buffer.length;
    		
    		var byteArr = new ArrayBuffer(len + 10);
    		var dv = new DataView(byteArr, 0);
    		dv.setUint32(0, len + 6, false);
    		dv.setUint32(4, this.heartCount, false);
    		dv.setUint16(8, command, false);
    		for(var i = 0; i < len; i++) {
    			dv.setUint8(10 + i, buffer[i], false);
    		}
    		this.heartCount++;
    		GameServerManager.send(byteArr);
    		
    	}
    })(ProtobufManager || (ProtobufManager = {}));
    window.ProtobufManager = ProtobufManager;

下面，给出我用的client.proto文件

// 包结构
    // +------------------+-------------------+------------------+----------------+
    // |  length(uint32)  |  sequence(uint32) | command(uint16)  |  frame([]byte) |
    // +------------------+-------------------+------------------+----------------+
    //       4 byte              4 byte              2 byte
    // length: 包大小
    // sequence: 请求包的序号,新会话自1开始递增
    // command: 协议号  
    // frame: 具体Message序列化后的二进制数据
    
    // 返回包与请求包格式一致,服务器主动推送包sequence为0,请求返回包sequence同请求包一致
    
    
    // server 
    // 113.10.201.102:3800
    
    enum Proto {
        option allow_alias = true;
        UNKNOWN     = 0;
        PackSize    = 4;
        SeqIDSize   = 4;
        CommandSize = 2;
    }
    
    
    enum Command {
        // 主命令 (0 ~ 99)
        client_heart_beat     = 0;   // 心跳包..    -> AutoID  
        client_heart_beat_ack = 1;   // 心跳响应     -> AutoID   
    
        // 测试命令 (10000 ~)
        //test_any = 10001;
        test_oneof = 10002;
        test_map   = 10003;
        
    }
    
    
    message Test {
        // enum anyType {
        //    t_int64 = 0;   // AutoID
        //    t_str = 1;    // String
        // }
        // message Any {
        //    anyType type = 1;
        //    google.protobuf.Any body = 2;
        // }
        message Oneof {
            oneof test_oneof{
                string name = 1;
                int32 age = 2;
            }
        }
        message Map {
            map<uint32, double> body = 1;
        }
    }
    
    
    // 请求的通用回复
    message CommonReply {
        enum Code {
            SUCCESS                   = 0;
            ERR_INVALID_PROTOCOL      = 1;
            ERR_INVALID_DATA          = 2; //客户端数据错误
            ERR_INVALID_OPERATION     = 3; //无效操作
            ERR_USER_UNUSABLE         = 6; //用户未激活
            ERR_ACCOUT_LOCK           = 7; //账户被锁定，禁止下注
            ERR_AUTHFAIL              = 401; //登录认证失败
            ERR_SERVER_INTERNAL_ERROR = 500; //服务端内部错误
        }
        Code code = 1;
        string desc = 2;
    }
    
    
    // 用于只传id或一个数字的结果, 如心跳, 大厅人数
    message AutoID {
        int64 id = 1;
    }

代码里的GameServerManager是一个websocket。  
如果大家不了解websocket怎么使用，这里有我的[下一篇文章][Link 1]，是和这篇protobuf衔接的。

[https_github.com_dcodeIO_protobuf.js_releases]: https://github.com/dcodeIO/protobuf.js/releases/
[Link 1]: http://blog.csdn.net/u013654125/article/details/75222939